#include "c-lang.h"
#include "go-lang.h"
#include "valprint.h"
+#include "gdbcore.h" /* for gnutarget */
+#include "gdb/gdb-index.h"
#include <ctype.h>
+#include "gdb_bfd.h"
#include <fcntl.h>
#include "gdb_string.h"
#include "gdb_assert.h"
#include <sys/types.h>
-#ifdef HAVE_ZLIB_H
-#include <zlib.h>
-#endif
-#ifdef HAVE_MMAP
-#include <sys/mman.h>
-#ifndef MAP_FAILED
-#define MAP_FAILED ((void *) -1)
-#endif
-#endif
typedef struct symbol *symbolp;
DEF_VEC_P (symbolp);
+/* When non-zero, print basic high level tracing messages.
+ This is in contrast to the low level DIE reading of dwarf2_die_debug. */
+static int dwarf2_read_debug = 0;
+
/* When non-zero, dump DIEs after they are read in. */
static int dwarf2_die_debug = 0;
static int check_physname = 0;
/* When non-zero, do not reject deprecated .gdb_index sections. */
-int use_deprecated_index_sections = 0;
-
-static int pagesize;
+static int use_deprecated_index_sections = 0;
/* When set, the file that we're processing is known to have debugging
info for C++ namespaces. GCC 3.3.x did not produce this information,
asection *asection;
gdb_byte *buffer;
bfd_size_type size;
- /* Not NULL if the section was actually mmapped. */
- void *map_addr;
- /* Page aligned size of mmapped area. */
- bfd_size_type map_len;
/* True if we have tried to read this section. */
int readin;
};
DEF_VEC_I (offset_type);
+/* Ensure only legit values are used. */
+#define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \
+ do { \
+ gdb_assert ((unsigned int) (value) <= 1); \
+ GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \
+ } while (0)
+
+/* Ensure only legit values are used. */
+#define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \
+ do { \
+ gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \
+ && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \
+ GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \
+ } while (0)
+
+/* Ensure we don't use more than the alloted nuber of bits for the CU. */
+#define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \
+ do { \
+ gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \
+ GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \
+ } while (0)
+
/* A description of the mapped index. The file format is described in
a comment by the code that writes the index. */
struct mapped_index
const char *constant_pool;
};
+typedef struct dwarf2_per_cu_data *dwarf2_per_cu_ptr;
+DEF_VEC_P (dwarf2_per_cu_ptr);
+
/* Collection of data recorded per objfile.
This hangs off of dwarf2_objfile_data_key. */
struct dwarf2_section_info macro;
struct dwarf2_section_info str;
struct dwarf2_section_info ranges;
+ struct dwarf2_section_info addr;
struct dwarf2_section_info frame;
struct dwarf2_section_info eh_frame;
struct dwarf2_section_info gdb_index;
int n_type_units;
/* The .debug_types-related CUs (TUs). */
- struct dwarf2_per_cu_data **all_type_units;
+ struct signatured_type **all_type_units;
- /* A chain of compilation units that are currently read in, so that
- they can be freed later. */
- struct dwarf2_per_cu_data *read_in_chain;
+ /* The number of entries in all_type_unit_groups. */
+ int n_type_unit_groups;
+
+ /* Table of type unit groups.
+ This exists to make it easy to iterate over all CUs and TU groups. */
+ struct type_unit_group **all_type_unit_groups;
+
+ /* Table of struct type_unit_group objects.
+ The hash key is the DW_AT_stmt_list value. */
+ htab_t type_unit_groups;
/* A table mapping .debug_types signatures to its signatured_type entry.
This is NULL if the .debug_types section hasn't been read in yet. */
htab_t signatured_types;
+ /* Type unit statistics, to see how well the scaling improvements
+ are doing. */
+ struct tu_stats
+ {
+ int nr_uniq_abbrev_tables;
+ int nr_symtabs;
+ int nr_symtab_sharers;
+ int nr_stmt_less_type_units;
+ } tu_stats;
+
+ /* A chain of compilation units that are currently read in, so that
+ they can be freed later. */
+ struct dwarf2_per_cu_data *read_in_chain;
+
+ /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
+ This is NULL if the table hasn't been allocated yet. */
+ htab_t dwo_files;
+
+ /* The shared '.dwz' file, if one exists. This is used when the
+ original data was compressed using 'dwz -m'. */
+ struct dwz_file *dwz_file;
+
/* A flag indicating wether this objfile has a section loaded at a
VMA of 0. */
int has_section_at_zero;
This is NULL if not allocated yet.
The mapping is done via (CU/TU signature + DIE offset) -> type. */
htab_t die_type_hash;
+
+ /* The CUs we recently read. */
+ VEC (dwarf2_per_cu_ptr) *just_read_cus;
};
static struct dwarf2_per_objfile *dwarf2_per_objfile;
{ ".debug_str", ".zdebug_str" },
{ ".debug_ranges", ".zdebug_ranges" },
{ ".debug_types", ".zdebug_types" },
+ { ".debug_addr", ".zdebug_addr" },
{ ".debug_frame", ".zdebug_frame" },
{ ".eh_frame", NULL },
{ ".gdb_index", ".zgdb_index" },
23
};
-/* local data types */
+/* List of DWO sections. */
+
+static const struct dwo_section_names
+{
+ struct dwarf2_section_names abbrev_dwo;
+ struct dwarf2_section_names info_dwo;
+ struct dwarf2_section_names line_dwo;
+ struct dwarf2_section_names loc_dwo;
+ struct dwarf2_section_names macinfo_dwo;
+ struct dwarf2_section_names macro_dwo;
+ struct dwarf2_section_names str_dwo;
+ struct dwarf2_section_names str_offsets_dwo;
+ struct dwarf2_section_names types_dwo;
+}
+dwo_section_names =
+{
+ { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
+ { ".debug_info.dwo", ".zdebug_info.dwo" },
+ { ".debug_line.dwo", ".zdebug_line.dwo" },
+ { ".debug_loc.dwo", ".zdebug_loc.dwo" },
+ { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
+ { ".debug_macro.dwo", ".zdebug_macro.dwo" },
+ { ".debug_str.dwo", ".zdebug_str.dwo" },
+ { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
+ { ".debug_types.dwo", ".zdebug_types.dwo" },
+};
-/* We hold several abbreviation tables in memory at the same time. */
-#ifndef ABBREV_HASH_SIZE
-#define ABBREV_HASH_SIZE 121
-#endif
+/* local data types */
/* The data in a compilation unit header, after target2host
translation, looks like this. */
distinguish these in buildsym.c. */
struct pending **list_in_scope;
- /* DWARF abbreviation table associated with this compilation unit. */
- struct abbrev_info **dwarf2_abbrevs;
-
- /* Storage for the abbrev table. */
- struct obstack abbrev_obstack;
+ /* The abbrev table for this CU.
+ Normally this points to the abbrev table in the objfile.
+ But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */
+ struct abbrev_table *abbrev_table;
/* Hash table holding all the loaded partial DIEs
with partial_die->offset.SECT_OFF as hash. */
/* To be copied to symtab->call_site_htab. */
htab_t call_site_htab;
+ /* Non-NULL if this CU came from a DWO file.
+ There is an invariant here that is important to remember:
+ Except for attributes copied from the top level DIE in the "main"
+ (or "stub") file in preparation for reading the DWO file
+ (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
+ Either there isn't a DWO file (in which case this is NULL and the point
+ is moot), or there is and either we're not going to read it (in which
+ case this is NULL) or there is and we are reading it (in which case this
+ is non-NULL). */
+ struct dwo_unit *dwo_unit;
+
+ /* The DW_AT_addr_base attribute if present, zero otherwise
+ (zero is a valid value though).
+ Note this value comes from the stub CU/TU's DIE. */
+ ULONGEST addr_base;
+
+ /* The DW_AT_ranges_base attribute if present, zero otherwise
+ (zero is a valid value though).
+ Note this value comes from the stub CU/TU's DIE.
+ Also note that the value is zero in the non-DWO case so this value can
+ be used without needing to know whether DWO files are in use or not. */
+ ULONGEST ranges_base;
+
/* Mark used when releasing cached dies. */
unsigned int mark : 1;
unoptimized code. For a future better test see GCC PR other/32998. */
unsigned int has_loclist : 1;
- /* These cache the results of producer_is_gxx_lt_4_6.
- CHECKED_PRODUCER is set if PRODUCER_IS_GXX_LT_4_6 is valid. This
- information is cached because profiling CU expansion showed
- excessive time spent in producer_is_gxx_lt_4_6. */
+ /* These cache the results for producer_is_gxx_lt_4_6 and producer_is_icc.
+ CHECKED_PRODUCER is set if both PRODUCER_IS_GXX_LT_4_6 and PRODUCER_IS_ICC
+ are valid. This information is cached because profiling CU expansion
+ showed excessive time spent in producer_is_gxx_lt_4_6. */
unsigned int checked_producer : 1;
unsigned int producer_is_gxx_lt_4_6 : 1;
+ unsigned int producer_is_icc : 1;
};
/* Persistent data held for a compilation unit, even when not
struct dwarf2_per_cu_data
{
- /* The start offset and length of this compilation unit. 2**29-1
- bytes should suffice to store the length of any compilation unit
- - if it doesn't, GDB will fall over anyway.
+ /* The start offset and length of this compilation unit.
NOTE: Unlike comp_unit_head.length, this length includes
- initial_length_size. */
+ initial_length_size.
+ If the DIE refers to a DWO file, this is always of the original die,
+ not the DWO file. */
sect_offset offset;
- unsigned int length : 29;
+ unsigned int length;
/* Flag indicating this compilation unit will be read in before
any of the current compilation units are processed. */
hash table and don't find it. */
unsigned int load_all_dies : 1;
- /* Non-null if this CU is from .debug_types; in which case it points
- to the section. Otherwise it's from .debug_info. */
- struct dwarf2_section_info *debug_types_section;
+ /* Non-zero if this CU is from .debug_types. */
+ unsigned int is_debug_types : 1;
+
+ /* Non-zero if this CU is from the .dwz file. */
+ unsigned int is_dwz : 1;
+
+ /* The section this CU/TU lives in.
+ If the DIE refers to a DWO file, this is always the original die,
+ not the DWO file. */
+ struct dwarf2_section_info *info_or_types_section;
/* Set to non-NULL iff this CU is currently loaded. When it gets freed out
of the CU cache it gets reset to NULL again. */
union
{
/* The partial symbol table associated with this compilation unit,
- or NULL for partial units (which do not have an associated
- symtab). */
+ or NULL for unread partial units. */
struct partial_symtab *psymtab;
/* Data needed by the "quick" functions. */
struct dwarf2_per_cu_quick_data *quick;
} v;
+
+ union
+ {
+ /* The CUs we import using DW_TAG_imported_unit. This is filled in
+ while reading psymtabs, used to compute the psymtab dependencies,
+ and then cleared. Then it is filled in again while reading full
+ symbols, and only deleted when the objfile is destroyed. */
+ VEC (dwarf2_per_cu_ptr) *imported_symtabs;
+
+ /* Type units are grouped by their DW_AT_stmt_list entry so that they
+ can share them. If this is a TU, this points to the containing
+ symtab. */
+ struct type_unit_group *type_unit_group;
+ } s;
};
/* Entry in the signatured_types hash table. */
struct signatured_type
{
+ /* The "per_cu" object of this type.
+ N.B.: This is the first member so that it's easy to convert pointers
+ between them. */
+ struct dwarf2_per_cu_data per_cu;
+
+ /* The type's signature. */
ULONGEST signature;
- /* Offset in this TU of the type defined by this TU. */
- cu_offset type_offset;
+ /* Offset in the TU of the type's DIE, as read from the TU header.
+ If the definition lives in a DWO file, this value is unusable. */
+ cu_offset type_offset_in_tu;
+
+ /* Offset in the section of the type's DIE.
+ If the definition lives in a DWO file, this is the offset in the
+ .debug_types.dwo section.
+ The value is zero until the actual value is known.
+ Zero is otherwise not a valid section offset. */
+ sect_offset type_offset_in_section;
+};
+
+/* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
+ This includes type_unit_group and quick_file_names. */
+
+struct stmt_list_hash
+{
+ /* The DWO unit this table is from or NULL if there is none. */
+ struct dwo_unit *dwo_unit;
+
+ /* Offset in .debug_line or .debug_line.dwo. */
+ sect_offset line_offset;
+};
+
+/* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
+ an object of this type. */
- /* The CU(/TU) of this type. */
+struct type_unit_group
+{
+ /* dwarf2read.c's main "handle" on the symtab.
+ To simplify things we create an artificial CU that "includes" all the
+ type units using this stmt_list so that the rest of the code still has
+ a "per_cu" handle on the symtab.
+ This PER_CU is recognized by having no section. */
+#define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->info_or_types_section == NULL)
struct dwarf2_per_cu_data per_cu;
+
+ union
+ {
+ /* The TUs that share this DW_AT_stmt_list entry.
+ This is added to while parsing type units to build partial symtabs,
+ and is deleted afterwards and not used again. */
+ VEC (dwarf2_per_cu_ptr) *tus;
+
+ /* When reading the line table in "quick" functions, we need a real TU.
+ Any will do, we know they all share the same DW_AT_stmt_list entry.
+ For simplicity's sake, we pick the first one. */
+ struct dwarf2_per_cu_data *first_tu;
+ } t;
+
+ /* The primary symtab.
+ Type units in a group needn't all be defined in the same source file,
+ so we create an essentially anonymous symtab as the primary symtab. */
+ struct symtab *primary_symtab;
+
+ /* The data used to construct the hash key. */
+ struct stmt_list_hash hash;
+
+ /* The number of symtabs from the line header.
+ The value here must match line_header.num_file_names. */
+ unsigned int num_symtabs;
+
+ /* The symbol tables for this TU (obtained from the files listed in
+ DW_AT_stmt_list).
+ WARNING: The order of entries here must match the order of entries
+ in the line header. After the first TU using this type_unit_group, the
+ line header for the subsequent TUs is recreated from this. This is done
+ because we need to use the same symtabs for each TU using the same
+ DW_AT_stmt_list value. Also note that symtabs may be repeated here,
+ there's no guarantee the line header doesn't have duplicate entries. */
+ struct symtab **symtabs;
+};
+
+/* These sections are what may appear in a "dwo" file. */
+
+struct dwo_sections
+{
+ struct dwarf2_section_info abbrev;
+ struct dwarf2_section_info info;
+ struct dwarf2_section_info line;
+ struct dwarf2_section_info loc;
+ struct dwarf2_section_info macinfo;
+ struct dwarf2_section_info macro;
+ struct dwarf2_section_info str;
+ struct dwarf2_section_info str_offsets;
+ VEC (dwarf2_section_info_def) *types;
+};
+
+/* Common bits of DWO CUs/TUs. */
+
+struct dwo_unit
+{
+ /* Backlink to the containing struct dwo_file. */
+ struct dwo_file *dwo_file;
+
+ /* The "id" that distinguishes this CU/TU.
+ .debug_info calls this "dwo_id", .debug_types calls this "signature".
+ Since signatures came first, we stick with it for consistency. */
+ ULONGEST signature;
+
+ /* The section this CU/TU lives in, in the DWO file. */
+ struct dwarf2_section_info *info_or_types_section;
+
+ /* Same as dwarf2_per_cu_data:{offset,length} but for the DWO section. */
+ sect_offset offset;
+ unsigned int length;
+
+ /* For types, offset in the type's DIE of the type defined by this TU. */
+ cu_offset type_offset_in_tu;
+};
+
+/* Data for one DWO file. */
+
+struct dwo_file
+{
+ /* The DW_AT_GNU_dwo_name attribute.
+ We don't manage space for this, it's an attribute. */
+ const char *dwo_name;
+
+ /* The bfd, when the file is open. Otherwise this is NULL. */
+ bfd *dwo_bfd;
+
+ /* Section info for this file. */
+ struct dwo_sections sections;
+
+ /* Table of CUs in the file.
+ Each element is a struct dwo_unit. */
+ htab_t cus;
+
+ /* Table of TUs in the file.
+ Each element is a struct dwo_unit. */
+ htab_t tus;
+};
+
+/* This represents a '.dwz' file. */
+
+struct dwz_file
+{
+ /* A dwz file can only contain a few sections. */
+ struct dwarf2_section_info abbrev;
+ struct dwarf2_section_info info;
+ struct dwarf2_section_info str;
+ struct dwarf2_section_info line;
+ struct dwarf2_section_info macro;
+ struct dwarf2_section_info gdb_index;
+
+ /* The dwz's BFD. */
+ bfd *dwz_bfd;
};
/* Struct used to pass misc. parameters to read_die_and_children, et
/* The CU of the DIE we are parsing. */
struct dwarf2_cu *cu;
+ /* Non-NULL if reading a DWO file. */
+ struct dwo_file *dwo_file;
+
/* The section the die comes from.
- This is either .debug_info or .debug_types. */
+ This is either .debug_info or .debug_types, or the .dwo variants. */
struct dwarf2_section_info *die_section;
/* die_section->buffer. */
gdb_byte *buffer;
+
+ /* The end of the buffer. */
+ const gdb_byte *buffer_end;
};
-/* Type of function passed to init_cu_and_read_dies, et.al. */
+/* Type of function passed to init_cutu_and_read_dies, et.al. */
typedef void (die_reader_func_ftype) (const struct die_reader_specs *reader,
gdb_byte *info_ptr,
struct die_info *comp_unit_die,
/* Flag set if fixup_partial_die has been called on this die. */
unsigned int fixup_called : 1;
+ /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
+ unsigned int is_dwz : 1;
+
+ /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
+ unsigned int spec_is_dwz : 1;
+
/* The name of this DIE. Normally the value of DW_AT_name, but
sometimes a default name for unnamed DIEs. */
char *name;
when this compilation unit leaves the cache. */
char *scope;
- /* The location description associated with this DIE, if any. */
- struct dwarf_block *locdesc;
+ /* Some data associated with the partial DIE. The tag determines
+ which field is live. */
+ union
+ {
+ /* The location description associated with this DIE, if any. */
+ struct dwarf_block *locdesc;
+ /* The offset of an import, for DW_TAG_imported_unit. */
+ sect_offset offset;
+ } d;
/* If HAS_PC_INFO, the PC range associated with this DIE. */
CORE_ADDR lowpc;
ENUM_BITFIELD(dwarf_form) form : 16;
};
+/* Size of abbrev_table.abbrev_hash_table. */
+#define ABBREV_HASH_SIZE 121
+
+/* Top level data structure to contain an abbreviation table. */
+
+struct abbrev_table
+{
+ /* Where the abbrev table came from.
+ This is used as a sanity check when the table is used. */
+ sect_offset offset;
+
+ /* Storage for the abbrev table. */
+ struct obstack abbrev_obstack;
+
+ /* Hash table of abbrevs.
+ This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
+ It could be statically allocated, but the previous code didn't so we
+ don't either. */
+ struct abbrev_info **abbrevs;
+};
+
/* Attributes have a name and a value. */
struct attribute
{
struct dwarf2_queue_item
{
struct dwarf2_per_cu_data *per_cu;
+ enum language pretend_language;
struct dwarf2_queue_item *next;
};
}
static void
-dwarf2_macros_too_long_complaint (struct dwarf2_section_info *section)
+dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info *section)
{
complaint (&symfile_complaints,
- _("macro info runs off end of `%s' section"),
- section->asection->name);
+ _("debug info runs off end of %s section"
+ " [in module %s]"),
+ section->asection->name,
+ bfd_get_filename (section->asection->owner));
}
static void
static void psymtab_to_symtab_1 (struct partial_symtab *);
+static struct abbrev_info *abbrev_table_lookup_abbrev
+ (const struct abbrev_table *, unsigned int);
+
+static struct abbrev_table *abbrev_table_read_table
+ (struct dwarf2_section_info *, sect_offset);
+
+static void abbrev_table_free (struct abbrev_table *);
+
+static void abbrev_table_free_cleanup (void *);
+
static void dwarf2_read_abbrevs (struct dwarf2_cu *,
struct dwarf2_section_info *);
static unsigned int peek_abbrev_code (bfd *, gdb_byte *);
-static struct abbrev_info *peek_die_abbrev (gdb_byte *, unsigned int *,
- struct dwarf2_cu *);
-
-static struct abbrev_info *dwarf2_lookup_abbrev (unsigned int,
- struct dwarf2_cu *);
-
static struct partial_die_info *load_partial_dies
(const struct die_reader_specs *, gdb_byte *, int);
unsigned int,
gdb_byte *);
-static struct partial_die_info *find_partial_die (sect_offset,
+static struct partial_die_info *find_partial_die (sect_offset, int,
struct dwarf2_cu *);
static void fixup_partial_die (struct partial_die_info *,
static LONGEST read_offset_1 (bfd *, gdb_byte *, unsigned int);
+static sect_offset read_abbrev_offset (struct dwarf2_section_info *,
+ sect_offset);
+
static gdb_byte *read_n_bytes (bfd *, gdb_byte *, unsigned int);
static char *read_direct_string (bfd *, gdb_byte *, unsigned int *);
const struct comp_unit_head *,
unsigned int *);
+static char *read_indirect_string_from_dwz (struct dwz_file *, LONGEST);
+
static ULONGEST read_unsigned_leb128 (bfd *, gdb_byte *, unsigned int *);
static LONGEST read_signed_leb128 (bfd *, gdb_byte *, unsigned int *);
-static gdb_byte *skip_leb128 (bfd *, gdb_byte *);
+static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, gdb_byte *,
+ unsigned int *);
+
+static char *read_str_index (const struct die_reader_specs *reader,
+ struct dwarf2_cu *cu, ULONGEST str_index);
static void set_cu_language (unsigned int, struct dwarf2_cu *);
struct dwarf2_cu *);
static struct attribute *dwarf2_attr_no_follow (struct die_info *,
- unsigned int,
- struct dwarf2_cu *);
+ unsigned int);
static int dwarf2_flag_true_p (struct die_info *die, unsigned name,
struct dwarf2_cu *cu);
static void add_file_name (struct line_header *, char *, unsigned int,
unsigned int, unsigned int);
-static struct line_header *(dwarf_decode_line_header
- (unsigned int offset,
- bfd *abfd, struct dwarf2_cu *cu));
+static struct line_header *dwarf_decode_line_header (unsigned int offset,
+ struct dwarf2_cu *cu);
static void dwarf_decode_lines (struct line_header *, const char *,
struct dwarf2_cu *, struct partial_symtab *,
static void dwarf2_start_subfile (char *, const char *, const char *);
+static void dwarf2_start_symtab (struct dwarf2_cu *,
+ char *, char *, CORE_ADDR);
+
static struct symbol *new_symbol (struct die_info *, struct type *,
struct dwarf2_cu *);
gdb_byte **new_info_ptr,
struct die_info *parent);
+static gdb_byte *read_full_die_1 (const struct die_reader_specs *,
+ struct die_info **, gdb_byte *, int *, int);
+
static gdb_byte *read_full_die (const struct die_reader_specs *,
struct die_info **, gdb_byte *, int *);
static struct die_info *dwarf2_extension (struct die_info *die,
struct dwarf2_cu **);
-static char *dwarf_tag_name (unsigned int);
+static const char *dwarf_tag_name (unsigned int);
-static char *dwarf_attr_name (unsigned int);
+static const char *dwarf_attr_name (unsigned int);
-static char *dwarf_form_name (unsigned int);
+static const char *dwarf_form_name (unsigned int);
static char *dwarf_bool_name (unsigned int);
-static char *dwarf_type_encoding_name (unsigned int);
-
-#if 0
-static char *dwarf_cfi_name (unsigned int);
-#endif
+static const char *dwarf_type_encoding_name (unsigned int);
static struct die_info *sibling_die (struct die_info *);
static void read_signatured_type (struct signatured_type *);
+static struct type_unit_group *get_type_unit_group
+ (struct dwarf2_cu *, struct attribute *);
+
+static void build_type_unit_groups (die_reader_func_ftype *, void *);
+
/* memory allocation interface */
static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *);
-static struct abbrev_info *dwarf_alloc_abbrev (struct dwarf2_cu *);
-
static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int);
-static void dwarf_decode_macros (struct line_header *, unsigned int,
- char *, bfd *, struct dwarf2_cu *,
- struct dwarf2_section_info *,
- int);
+static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int,
+ char *, int);
static int attr_form_is_block (struct attribute *);
static int partial_die_eq (const void *item_lhs, const void *item_rhs);
static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit
- (sect_offset offset, struct objfile *objfile);
+ (sect_offset offset, unsigned int offset_in_dwz, struct objfile *objfile);
static void init_one_comp_unit (struct dwarf2_cu *cu,
struct dwarf2_per_cu_data *per_cu);
static void prepare_one_comp_unit (struct dwarf2_cu *cu,
- struct die_info *comp_unit_die);
+ struct die_info *comp_unit_die,
+ enum language pretend_language);
static void free_heap_comp_unit (void *);
static int create_all_type_units (struct objfile *);
-static void load_full_comp_unit (struct dwarf2_per_cu_data *);
+static void load_full_comp_unit (struct dwarf2_per_cu_data *,
+ enum language);
+
+static void process_full_comp_unit (struct dwarf2_per_cu_data *,
+ enum language);
-static void process_full_comp_unit (struct dwarf2_per_cu_data *);
+static void process_full_type_unit (struct dwarf2_per_cu_data *,
+ enum language);
static void dwarf2_add_dependence (struct dwarf2_cu *,
struct dwarf2_per_cu_data *);
static void dwarf2_release_queue (void *dummy);
-static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu);
+static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu,
+ enum language pretend_language);
+
+static int maybe_queue_comp_unit (struct dwarf2_cu *this_cu,
+ struct dwarf2_per_cu_data *per_cu,
+ enum language pretend_language);
static void process_queue (void);
static gdb_byte *read_and_check_comp_unit_head
(struct comp_unit_head *header,
- struct dwarf2_section_info *section, gdb_byte *info_ptr,
+ struct dwarf2_section_info *section,
+ struct dwarf2_section_info *abbrev_section, gdb_byte *info_ptr,
int is_debug_types_section);
+static void init_cutu_and_read_dies
+ (struct dwarf2_per_cu_data *this_cu, struct abbrev_table *abbrev_table,
+ int use_existing_cu, int keep,
+ die_reader_func_ftype *die_reader_func, void *data);
+
static void init_cutu_and_read_dies_simple
(struct dwarf2_per_cu_data *this_cu,
die_reader_func_ftype *die_reader_func, void *data);
static htab_t allocate_signatured_type_table (struct objfile *objfile);
-static void process_psymtab_comp_unit (struct dwarf2_per_cu_data *);
+static htab_t allocate_dwo_unit_table (struct objfile *objfile);
+
+static struct dwo_unit *lookup_dwo_comp_unit
+ (struct dwarf2_per_cu_data *, char *, const char *, ULONGEST);
+
+static struct dwo_unit *lookup_dwo_type_unit
+ (struct signatured_type *, char *, const char *);
+
+static void free_dwo_file_cleanup (void *);
+
+static void process_cu_includes (void);
#if WORDS_BIGENDIAN
dwarf2_per_objfile->str.asection = sectp;
dwarf2_per_objfile->str.size = bfd_get_section_size (sectp);
}
+ else if (section_is_p (sectp->name, &names->addr))
+ {
+ dwarf2_per_objfile->addr.asection = sectp;
+ dwarf2_per_objfile->addr.size = bfd_get_section_size (sectp);
+ }
else if (section_is_p (sectp->name, &names->frame))
{
dwarf2_per_objfile->frame.asection = sectp;
}
else if (section_is_p (sectp->name, &names->eh_frame))
{
- flagword aflag = bfd_get_section_flags (ignore_abfd, sectp);
+ flagword aflag = bfd_get_section_flags (abfd, sectp);
if (aflag & SEC_HAS_CONTENTS)
{
dwarf2_per_objfile->has_section_at_zero = 1;
}
-/* Decompress a section that was compressed using zlib. Store the
- decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
-
-static void
-zlib_decompress_section (struct objfile *objfile, asection *sectp,
- gdb_byte **outbuf, bfd_size_type *outsize)
-{
- bfd *abfd = objfile->obfd;
-#ifndef HAVE_ZLIB_H
- error (_("Support for zlib-compressed DWARF data (from '%s') "
- "is disabled in this copy of GDB"),
- bfd_get_filename (abfd));
-#else
- bfd_size_type compressed_size = bfd_get_section_size (sectp);
- gdb_byte *compressed_buffer = xmalloc (compressed_size);
- struct cleanup *cleanup = make_cleanup (xfree, compressed_buffer);
- bfd_size_type uncompressed_size;
- gdb_byte *uncompressed_buffer;
- z_stream strm;
- int rc;
- int header_size = 12;
-
- if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
- || bfd_bread (compressed_buffer,
- compressed_size, abfd) != compressed_size)
- error (_("Dwarf Error: Can't read DWARF data from '%s'"),
- bfd_get_filename (abfd));
-
- /* Read the zlib header. In this case, it should be "ZLIB" followed
- by the uncompressed section size, 8 bytes in big-endian order. */
- if (compressed_size < header_size
- || strncmp (compressed_buffer, "ZLIB", 4) != 0)
- error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
- bfd_get_filename (abfd));
- uncompressed_size = compressed_buffer[4]; uncompressed_size <<= 8;
- uncompressed_size += compressed_buffer[5]; uncompressed_size <<= 8;
- uncompressed_size += compressed_buffer[6]; uncompressed_size <<= 8;
- uncompressed_size += compressed_buffer[7]; uncompressed_size <<= 8;
- uncompressed_size += compressed_buffer[8]; uncompressed_size <<= 8;
- uncompressed_size += compressed_buffer[9]; uncompressed_size <<= 8;
- uncompressed_size += compressed_buffer[10]; uncompressed_size <<= 8;
- uncompressed_size += compressed_buffer[11];
-
- /* It is possible the section consists of several compressed
- buffers concatenated together, so we uncompress in a loop. */
- strm.zalloc = NULL;
- strm.zfree = NULL;
- strm.opaque = NULL;
- strm.avail_in = compressed_size - header_size;
- strm.next_in = (Bytef*) compressed_buffer + header_size;
- strm.avail_out = uncompressed_size;
- uncompressed_buffer = obstack_alloc (&objfile->objfile_obstack,
- uncompressed_size);
- rc = inflateInit (&strm);
- while (strm.avail_in > 0)
- {
- if (rc != Z_OK)
- error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
- bfd_get_filename (abfd), rc);
- strm.next_out = ((Bytef*) uncompressed_buffer
- + (uncompressed_size - strm.avail_out));
- rc = inflate (&strm, Z_FINISH);
- if (rc != Z_STREAM_END)
- error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
- bfd_get_filename (abfd), rc);
- rc = inflateReset (&strm);
- }
- rc = inflateEnd (&strm);
- if (rc != Z_OK
- || strm.avail_out != 0)
- error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
- bfd_get_filename (abfd), rc);
-
- do_cleanups (cleanup);
- *outbuf = uncompressed_buffer;
- *outsize = uncompressed_size;
-#endif
-}
-
-/* A helper function that decides whether a section is empty. */
+/* A helper function that decides whether a section is empty,
+ or not present. */
static int
dwarf2_section_empty_p (struct dwarf2_section_info *info)
return info->asection == NULL || info->size == 0;
}
-/* Read the contents of the section INFO from object file specified by
- OBJFILE, store info about the section into INFO.
+/* Read the contents of the section INFO.
+ OBJFILE is the main object file, but not necessarily the file where
+ the section comes from. E.g., for DWO files INFO->asection->owner
+ is the bfd of the DWO file.
If the section is compressed, uncompress it before returning. */
static void
dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info)
{
- bfd *abfd = objfile->obfd;
asection *sectp = info->asection;
+ bfd *abfd;
gdb_byte *buf, *retbuf;
unsigned char header[4];
if (info->readin)
return;
info->buffer = NULL;
- info->map_addr = NULL;
info->readin = 1;
if (dwarf2_section_empty_p (info))
return;
- /* Check if the file has a 4-byte header indicating compression. */
- if (info->size > sizeof (header)
- && bfd_seek (abfd, sectp->filepos, SEEK_SET) == 0
- && bfd_bread (header, sizeof (header), abfd) == sizeof (header))
- {
- /* Upon decompression, update the buffer and its size. */
- if (strncmp (header, "ZLIB", sizeof (header)) == 0)
- {
- zlib_decompress_section (objfile, sectp, &info->buffer,
- &info->size);
- return;
- }
- }
-
-#ifdef HAVE_MMAP
- if (pagesize == 0)
- pagesize = getpagesize ();
+ abfd = sectp->owner;
- /* Only try to mmap sections which are large enough: we don't want to
- waste space due to fragmentation. Also, only try mmap for sections
- without relocations. */
-
- if (info->size > 4 * pagesize && (sectp->flags & SEC_RELOC) == 0)
+ /* If the section has relocations, we must read it ourselves.
+ Otherwise we attach it to the BFD. */
+ if ((sectp->flags & SEC_RELOC) == 0)
{
- info->buffer = bfd_mmap (abfd, 0, info->size, PROT_READ,
- MAP_PRIVATE, sectp->filepos,
- &info->map_addr, &info->map_len);
+ const gdb_byte *bytes = gdb_bfd_map_section (sectp, &info->size);
- if ((caddr_t)info->buffer != MAP_FAILED)
- {
-#if HAVE_POSIX_MADVISE
- posix_madvise (info->map_addr, info->map_len, POSIX_MADV_WILLNEED);
-#endif
- return;
- }
+ /* We have to cast away const here for historical reasons.
+ Fixing dwarf2read to be const-correct would be quite nice. */
+ info->buffer = (gdb_byte *) bytes;
+ return;
}
-#endif
- /* If we get here, we are a normal, not-compressed section. */
- info->buffer = buf
- = obstack_alloc (&objfile->objfile_obstack, info->size);
+ buf = obstack_alloc (&objfile->objfile_obstack, info->size);
+ info->buffer = buf;
/* When debugging .o files, we may need to apply relocations; see
http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
*sizep = info->size;
}
+/* A helper function to find the sections for a .dwz file. */
+
+static void
+locate_dwz_sections (bfd *abfd, asection *sectp, void *arg)
+{
+ struct dwz_file *dwz_file = arg;
+
+ /* Note that we only support the standard ELF names, because .dwz
+ is ELF-only (at the time of writing). */
+ if (section_is_p (sectp->name, &dwarf2_elf_names.abbrev))
+ {
+ dwz_file->abbrev.asection = sectp;
+ dwz_file->abbrev.size = bfd_get_section_size (sectp);
+ }
+ else if (section_is_p (sectp->name, &dwarf2_elf_names.info))
+ {
+ dwz_file->info.asection = sectp;
+ dwz_file->info.size = bfd_get_section_size (sectp);
+ }
+ else if (section_is_p (sectp->name, &dwarf2_elf_names.str))
+ {
+ dwz_file->str.asection = sectp;
+ dwz_file->str.size = bfd_get_section_size (sectp);
+ }
+ else if (section_is_p (sectp->name, &dwarf2_elf_names.line))
+ {
+ dwz_file->line.asection = sectp;
+ dwz_file->line.size = bfd_get_section_size (sectp);
+ }
+ else if (section_is_p (sectp->name, &dwarf2_elf_names.macro))
+ {
+ dwz_file->macro.asection = sectp;
+ dwz_file->macro.size = bfd_get_section_size (sectp);
+ }
+ else if (section_is_p (sectp->name, &dwarf2_elf_names.gdb_index))
+ {
+ dwz_file->gdb_index.asection = sectp;
+ dwz_file->gdb_index.size = bfd_get_section_size (sectp);
+ }
+}
+
+/* Open the separate '.dwz' debug file, if needed. Error if the file
+ cannot be found. */
+
+static struct dwz_file *
+dwarf2_get_dwz_file (void)
+{
+ bfd *abfd, *dwz_bfd;
+ asection *section;
+ gdb_byte *data;
+ struct cleanup *cleanup;
+ const char *filename;
+ struct dwz_file *result;
+
+ if (dwarf2_per_objfile->dwz_file != NULL)
+ return dwarf2_per_objfile->dwz_file;
+
+ abfd = dwarf2_per_objfile->objfile->obfd;
+ section = bfd_get_section_by_name (abfd, ".gnu_debugaltlink");
+ if (section == NULL)
+ error (_("could not find '.gnu_debugaltlink' section"));
+ if (!bfd_malloc_and_get_section (abfd, section, &data))
+ error (_("could not read '.gnu_debugaltlink' section: %s"),
+ bfd_errmsg (bfd_get_error ()));
+ cleanup = make_cleanup (xfree, data);
+
+ filename = data;
+ if (!IS_ABSOLUTE_PATH (filename))
+ {
+ char *abs = gdb_realpath (dwarf2_per_objfile->objfile->name);
+ char *rel;
+
+ make_cleanup (xfree, abs);
+ abs = ldirname (abs);
+ make_cleanup (xfree, abs);
+
+ rel = concat (abs, SLASH_STRING, filename, (char *) NULL);
+ make_cleanup (xfree, rel);
+ filename = rel;
+ }
+
+ /* The format is just a NUL-terminated file name, followed by the
+ build-id. For now, though, we ignore the build-id. */
+ dwz_bfd = gdb_bfd_open (filename, gnutarget, -1);
+ if (dwz_bfd == NULL)
+ error (_("could not read '%s': %s"), filename,
+ bfd_errmsg (bfd_get_error ()));
+
+ if (!bfd_check_format (dwz_bfd, bfd_object))
+ {
+ gdb_bfd_unref (dwz_bfd);
+ error (_("file '%s' was not usable: %s"), filename,
+ bfd_errmsg (bfd_get_error ()));
+ }
+
+ result = OBSTACK_ZALLOC (&dwarf2_per_objfile->objfile->objfile_obstack,
+ struct dwz_file);
+ result->dwz_bfd = dwz_bfd;
+
+ bfd_map_over_sections (dwz_bfd, locate_dwz_sections, result);
+
+ do_cleanups (cleanup);
+
+ return result;
+}
\f
/* DWARF quick_symbols_functions support. */
line_header when we're done and don't need to record it here. */
struct quick_file_names
{
- /* The offset in .debug_line of the line table. We hash on this. */
- unsigned int offset;
+ /* The data used to construct the hash key. */
+ struct stmt_list_hash hash;
/* The number of entries in file_names, real_names. */
unsigned int num_file_names;
unsigned int no_file_data : 1;
};
+/* Utility hash function for a stmt_list_hash. */
+
+static hashval_t
+hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash)
+{
+ hashval_t v = 0;
+
+ if (stmt_list_hash->dwo_unit != NULL)
+ v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file;
+ v += stmt_list_hash->line_offset.sect_off;
+ return v;
+}
+
+/* Utility equality function for a stmt_list_hash. */
+
+static int
+eq_stmt_list_entry (const struct stmt_list_hash *lhs,
+ const struct stmt_list_hash *rhs)
+{
+ if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL))
+ return 0;
+ if (lhs->dwo_unit != NULL
+ && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file)
+ return 0;
+
+ return lhs->line_offset.sect_off == rhs->line_offset.sect_off;
+}
+
/* Hash function for a quick_file_names. */
static hashval_t
{
const struct quick_file_names *file_data = e;
- return file_data->offset;
+ return hash_stmt_list_entry (&file_data->hash);
}
/* Equality function for a quick_file_names. */
const struct quick_file_names *ea = a;
const struct quick_file_names *eb = b;
- return ea->offset == eb->offset;
+ return eq_stmt_list_entry (&ea->hash, &eb->hash);
}
/* Delete function for a quick_file_names. */
static void
load_cu (struct dwarf2_per_cu_data *per_cu)
{
- if (per_cu->debug_types_section)
+ if (per_cu->is_debug_types)
load_full_type_unit (per_cu);
else
- load_full_comp_unit (per_cu);
+ load_full_comp_unit (per_cu, language_minimal);
gdb_assert (per_cu->cu != NULL);
{
struct cleanup *back_to;
- back_to = make_cleanup (dwarf2_release_queue, NULL);
+ /* Skip type_unit_groups, reading the type units they contain
+ is handled elsewhere. */
+ if (IS_TYPE_UNIT_GROUP (per_cu))
+ return;
- queue_comp_unit (per_cu);
+ back_to = make_cleanup (dwarf2_release_queue, NULL);
- load_cu (per_cu);
+ if (dwarf2_per_objfile->using_index
+ ? per_cu->v.quick->symtab == NULL
+ : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin))
+ {
+ queue_comp_unit (per_cu, language_minimal);
+ load_cu (per_cu);
+ }
process_queue ();
static struct symtab *
dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu)
{
+ gdb_assert (dwarf2_per_objfile->using_index);
if (!per_cu->v.quick->symtab)
{
struct cleanup *back_to = make_cleanup (free_cached_comp_units, NULL);
increment_reading_symtab ();
dw2_do_instantiate_symtab (per_cu);
+ process_cu_includes ();
do_cleanups (back_to);
}
return per_cu->v.quick->symtab;
}
-/* Return the CU given its index. */
+/* Return the CU given its index.
+
+ This is intended for loops like:
+
+ for (i = 0; i < (dwarf2_per_objfile->n_comp_units
+ + dwarf2_per_objfile->n_type_units); ++i)
+ {
+ struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
+
+ ...;
+ }
+*/
static struct dwarf2_per_cu_data *
dw2_get_cu (int index)
if (index >= dwarf2_per_objfile->n_comp_units)
{
index -= dwarf2_per_objfile->n_comp_units;
- return dwarf2_per_objfile->all_type_units[index];
+ gdb_assert (index < dwarf2_per_objfile->n_type_units);
+ return &dwarf2_per_objfile->all_type_units[index]->per_cu;
+ }
+
+ return dwarf2_per_objfile->all_comp_units[index];
+}
+
+/* Return the primary CU given its index.
+ The difference between this function and dw2_get_cu is in the handling
+ of type units (TUs). Here we return the type_unit_group object.
+
+ This is intended for loops like:
+
+ for (i = 0; i < (dwarf2_per_objfile->n_comp_units
+ + dwarf2_per_objfile->n_type_unit_groups); ++i)
+ {
+ struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i);
+
+ ...;
+ }
+*/
+
+static struct dwarf2_per_cu_data *
+dw2_get_primary_cu (int index)
+{
+ if (index >= dwarf2_per_objfile->n_comp_units)
+ {
+ index -= dwarf2_per_objfile->n_comp_units;
+ gdb_assert (index < dwarf2_per_objfile->n_type_unit_groups);
+ return &dwarf2_per_objfile->all_type_unit_groups[index]->per_cu;
}
+
return dwarf2_per_objfile->all_comp_units[index];
}
return 1;
}
-/* Read the CU list from the mapped index, and use it to create all
- the CU objects for this objfile. Return 0 if something went wrong,
- 1 if everything went ok. */
+/* A helper for create_cus_from_index that handles a given list of
+ CUs. */
static int
-create_cus_from_index (struct objfile *objfile, const gdb_byte *cu_list,
- offset_type cu_list_elements)
+create_cus_from_index_list (struct objfile *objfile,
+ const gdb_byte *cu_list, offset_type n_elements,
+ struct dwarf2_section_info *section,
+ int is_dwz,
+ int base_offset)
{
offset_type i;
- dwarf2_per_objfile->n_comp_units = cu_list_elements / 2;
- dwarf2_per_objfile->all_comp_units
- = obstack_alloc (&objfile->objfile_obstack,
- dwarf2_per_objfile->n_comp_units
- * sizeof (struct dwarf2_per_cu_data *));
-
- for (i = 0; i < cu_list_elements; i += 2)
+ for (i = 0; i < n_elements; i += 2)
{
struct dwarf2_per_cu_data *the_cu;
ULONGEST offset, length;
the_cu->offset.sect_off = offset;
the_cu->length = length;
the_cu->objfile = objfile;
+ the_cu->info_or_types_section = section;
the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack,
struct dwarf2_per_cu_quick_data);
- dwarf2_per_objfile->all_comp_units[i / 2] = the_cu;
+ the_cu->is_dwz = is_dwz;
+ dwarf2_per_objfile->all_comp_units[base_offset + i / 2] = the_cu;
}
return 1;
}
-/* Create the signatured type hash table from the index. */
-
+/* Read the CU list from the mapped index, and use it to create all
+ the CU objects for this objfile. Return 0 if something went wrong,
+ 1 if everything went ok. */
+
+static int
+create_cus_from_index (struct objfile *objfile,
+ const gdb_byte *cu_list, offset_type cu_list_elements,
+ const gdb_byte *dwz_list, offset_type dwz_elements)
+{
+ struct dwz_file *dwz;
+
+ dwarf2_per_objfile->n_comp_units = (cu_list_elements + dwz_elements) / 2;
+ dwarf2_per_objfile->all_comp_units
+ = obstack_alloc (&objfile->objfile_obstack,
+ dwarf2_per_objfile->n_comp_units
+ * sizeof (struct dwarf2_per_cu_data *));
+
+ if (!create_cus_from_index_list (objfile, cu_list, cu_list_elements,
+ &dwarf2_per_objfile->info, 0, 0))
+ return 0;
+
+ if (dwz_elements == 0)
+ return 1;
+
+ dwz = dwarf2_get_dwz_file ();
+ return create_cus_from_index_list (objfile, dwz_list, dwz_elements,
+ &dwz->info, 1, cu_list_elements / 2);
+}
+
+/* Create the signatured type hash table from the index. */
+
static int
create_signatured_type_table_from_index (struct objfile *objfile,
struct dwarf2_section_info *section,
dwarf2_per_objfile->all_type_units
= obstack_alloc (&objfile->objfile_obstack,
dwarf2_per_objfile->n_type_units
- * sizeof (struct dwarf2_per_cu_data *));
+ * sizeof (struct signatured_type *));
sig_types_hash = allocate_signatured_type_table (objfile);
sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack,
struct signatured_type);
sig_type->signature = signature;
- sig_type->type_offset.cu_off = type_offset_in_tu;
- sig_type->per_cu.debug_types_section = section;
+ sig_type->type_offset_in_tu.cu_off = type_offset_in_tu;
+ sig_type->per_cu.is_debug_types = 1;
+ sig_type->per_cu.info_or_types_section = section;
sig_type->per_cu.offset.sect_off = offset;
sig_type->per_cu.objfile = objfile;
sig_type->per_cu.v.quick
slot = htab_find_slot (sig_types_hash, sig_type, INSERT);
*slot = sig_type;
- dwarf2_per_objfile->all_type_units[i / 3] = &sig_type->per_cu;
+ dwarf2_per_objfile->all_type_units[i / 3] = sig_type;
}
dwarf2_per_objfile->signatured_types = sig_types_hash;
}
}
-/* Read the index file. If everything went ok, initialize the "quick"
- elements of all the CUs and return 1. Otherwise, return 0. */
+/* A helper function that reads the .gdb_index from SECTION and fills
+ in MAP. FILENAME is the name of the file containing the section;
+ it is used for error reporting. DEPRECATED_OK is nonzero if it is
+ ok to use deprecated sections.
+
+ CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
+ out parameters that are filled in with information about the CU and
+ TU lists in the section.
+
+ Returns 1 if all went well, 0 otherwise. */
static int
-dwarf2_read_index (struct objfile *objfile)
+read_index_from_section (struct objfile *objfile,
+ const char *filename,
+ int deprecated_ok,
+ struct dwarf2_section_info *section,
+ struct mapped_index *map,
+ const gdb_byte **cu_list,
+ offset_type *cu_list_elements,
+ const gdb_byte **types_list,
+ offset_type *types_list_elements)
{
char *addr;
- struct mapped_index *map;
+ offset_type version;
offset_type *metadata;
- const gdb_byte *cu_list;
- const gdb_byte *types_list = NULL;
- offset_type version, cu_list_elements;
- offset_type types_list_elements = 0;
int i;
- if (dwarf2_section_empty_p (&dwarf2_per_objfile->gdb_index))
+ if (dwarf2_section_empty_p (section))
return 0;
/* Older elfutils strip versions could keep the section in the main
executable while splitting it for the separate debug info file. */
- if ((bfd_get_file_flags (dwarf2_per_objfile->gdb_index.asection)
- & SEC_HAS_CONTENTS) == 0)
+ if ((bfd_get_file_flags (section->asection) & SEC_HAS_CONTENTS) == 0)
return 0;
- dwarf2_read_section (objfile, &dwarf2_per_objfile->gdb_index);
+ dwarf2_read_section (objfile, section);
- addr = dwarf2_per_objfile->gdb_index.buffer;
+ addr = section->buffer;
/* Version check. */
version = MAYBE_SWAP (*(offset_type *) addr);
/* Versions earlier than 3 emitted every copy of a psymbol. This
if (!warning_printed)
{
warning (_("Skipping obsolete .gdb_index section in %s."),
- objfile->name);
+ filename);
warning_printed = 1;
}
return 0;
Versions earlier than 6 did not emit psymbols for inlined
functions. Using these files will cause GDB not to be able to
set breakpoints on inlined functions by name, so we ignore these
- indices unless the --use-deprecated-index-sections command line
- option was supplied. */
- if (version < 6 && !use_deprecated_index_sections)
+ indices unless the user has done
+ "set use-deprecated-index-sections on". */
+ if (version < 6 && !deprecated_ok)
{
static int warning_printed = 0;
if (!warning_printed)
{
- warning (_("Skipping deprecated .gdb_index section in %s, pass "
- "--use-deprecated-index-sections to use them anyway"),
- objfile->name);
+ warning (_("\
+Skipping deprecated .gdb_index section in %s.\n\
+Do \"set use-deprecated-index-sections on\" before the file is read\n\
+to use the section anyway."),
+ filename);
warning_printed = 1;
}
return 0;
}
/* Indexes with higher version than the one supported by GDB may be no
longer backward compatible. */
- if (version > 6)
+ if (version > 7)
return 0;
- map = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct mapped_index);
map->version = version;
- map->total_size = dwarf2_per_objfile->gdb_index.size;
+ map->total_size = section->size;
metadata = (offset_type *) (addr + sizeof (offset_type));
i = 0;
- cu_list = addr + MAYBE_SWAP (metadata[i]);
- cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i]))
- / 8);
+ *cu_list = addr + MAYBE_SWAP (metadata[i]);
+ *cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i]))
+ / 8);
++i;
- types_list = addr + MAYBE_SWAP (metadata[i]);
- types_list_elements = ((MAYBE_SWAP (metadata[i + 1])
- - MAYBE_SWAP (metadata[i]))
- / 8);
+ *types_list = addr + MAYBE_SWAP (metadata[i]);
+ *types_list_elements = ((MAYBE_SWAP (metadata[i + 1])
+ - MAYBE_SWAP (metadata[i]))
+ / 8);
++i;
map->address_table = addr + MAYBE_SWAP (metadata[i]);
map->constant_pool = addr + MAYBE_SWAP (metadata[i]);
+ return 1;
+}
+
+
+/* Read the index file. If everything went ok, initialize the "quick"
+ elements of all the CUs and return 1. Otherwise, return 0. */
+
+static int
+dwarf2_read_index (struct objfile *objfile)
+{
+ struct mapped_index local_map, *map;
+ const gdb_byte *cu_list, *types_list, *dwz_list = NULL;
+ offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0;
+
+ if (!read_index_from_section (objfile, objfile->name,
+ use_deprecated_index_sections,
+ &dwarf2_per_objfile->gdb_index, &local_map,
+ &cu_list, &cu_list_elements,
+ &types_list, &types_list_elements))
+ return 0;
+
/* Don't use the index if it's empty. */
- if (map->symbol_table_slots == 0)
+ if (local_map.symbol_table_slots == 0)
return 0;
- if (!create_cus_from_index (objfile, cu_list, cu_list_elements))
+ /* If there is a .dwz file, read it so we can get its CU list as
+ well. */
+ if (bfd_get_section_by_name (objfile->obfd, ".gnu_debugaltlink") != NULL)
+ {
+ struct dwz_file *dwz = dwarf2_get_dwz_file ();
+ struct mapped_index dwz_map;
+ const gdb_byte *dwz_types_ignore;
+ offset_type dwz_types_elements_ignore;
+
+ if (!read_index_from_section (objfile, bfd_get_filename (dwz->dwz_bfd),
+ 1,
+ &dwz->gdb_index, &dwz_map,
+ &dwz_list, &dwz_list_elements,
+ &dwz_types_ignore,
+ &dwz_types_elements_ignore))
+ {
+ warning (_("could not read '.gdb_index' section from %s; skipping"),
+ bfd_get_filename (dwz->dwz_bfd));
+ return 0;
+ }
+ }
+
+ if (!create_cus_from_index (objfile, cu_list, cu_list_elements,
+ dwz_list, dwz_list_elements))
return 0;
if (types_list_elements)
return 0;
}
- create_addrmap_from_index (objfile, map);
+ create_addrmap_from_index (objfile, &local_map);
+
+ map = obstack_alloc (&objfile->objfile_obstack, sizeof (struct mapped_index));
+ *map = local_map;
dwarf2_per_objfile->index_table = map;
dwarf2_per_objfile->using_index = 1;
gdb_assert (dwarf2_per_objfile);
}
+/* Reader function for dw2_build_type_unit_groups. */
+
+static void
+dw2_build_type_unit_groups_reader (const struct die_reader_specs *reader,
+ gdb_byte *info_ptr,
+ struct die_info *type_unit_die,
+ int has_children,
+ void *data)
+{
+ struct dwarf2_cu *cu = reader->cu;
+ struct attribute *attr;
+ struct type_unit_group *tu_group;
+
+ gdb_assert (data == NULL);
+
+ if (! has_children)
+ return;
+
+ attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list);
+ /* Call this for its side-effect of creating the associated
+ struct type_unit_group if it doesn't already exist. */
+ tu_group = get_type_unit_group (cu, attr);
+}
+
+/* Build dwarf2_per_objfile->type_unit_groups.
+ This function may be called multiple times. */
+
+static void
+dw2_build_type_unit_groups (void)
+{
+ if (dwarf2_per_objfile->type_unit_groups == NULL)
+ build_type_unit_groups (dw2_build_type_unit_groups_reader, NULL);
+}
+
/* die_reader_func for dw2_get_file_names. */
static void
struct dwarf2_cu *cu = reader->cu;
struct dwarf2_per_cu_data *this_cu = cu->per_cu;
struct objfile *objfile = dwarf2_per_objfile->objfile;
- bfd *abfd = objfile->obfd;
+ struct dwarf2_per_cu_data *lh_cu;
struct line_header *lh;
struct attribute *attr;
int i;
- unsigned int bytes_read;
char *name, *comp_dir;
void **slot;
struct quick_file_names *qfn;
unsigned int line_offset;
+ /* Our callers never want to match partial units -- instead they
+ will match the enclosing full CU. */
+ if (comp_unit_die->tag == DW_TAG_partial_unit)
+ {
+ this_cu->v.quick->no_file_data = 1;
+ return;
+ }
+
+ /* If we're reading the line header for TUs, store it in the "per_cu"
+ for tu_group. */
+ if (this_cu->is_debug_types)
+ {
+ struct type_unit_group *tu_group = data;
+
+ gdb_assert (tu_group != NULL);
+ lh_cu = &tu_group->per_cu;
+ }
+ else
+ lh_cu = this_cu;
+
lh = NULL;
slot = NULL;
line_offset = 0;
/* We may have already read in this line header (TU line header sharing).
If we have we're done. */
- find_entry.offset = line_offset;
+ find_entry.hash.dwo_unit = cu->dwo_unit;
+ find_entry.hash.line_offset.sect_off = line_offset;
slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table,
&find_entry, INSERT);
if (*slot != NULL)
{
- this_cu->v.quick->file_names = *slot;
+ lh_cu->v.quick->file_names = *slot;
return;
}
- lh = dwarf_decode_line_header (line_offset, abfd, cu);
+ lh = dwarf_decode_line_header (line_offset, cu);
}
if (lh == NULL)
{
- this_cu->v.quick->no_file_data = 1;
+ lh_cu->v.quick->no_file_data = 1;
return;
}
qfn = obstack_alloc (&objfile->objfile_obstack, sizeof (*qfn));
- qfn->offset = line_offset;
+ qfn->hash.dwo_unit = cu->dwo_unit;
+ qfn->hash.line_offset.sect_off = line_offset;
gdb_assert (slot != NULL);
*slot = qfn;
free_line_header (lh);
- this_cu->v.quick->file_names = qfn;
+ lh_cu->v.quick->file_names = qfn;
}
/* A helper for the "quick" functions which attempts to read the line
dw2_get_file_names (struct objfile *objfile,
struct dwarf2_per_cu_data *this_cu)
{
+ /* For TUs this should only be called on the parent group. */
+ if (this_cu->is_debug_types)
+ gdb_assert (IS_TYPE_UNIT_GROUP (this_cu));
+
if (this_cu->v.quick->file_names != NULL)
return this_cu->v.quick->file_names;
/* If we know there is no line data, no point in looking again. */
if (this_cu->v.quick->no_file_data)
return NULL;
- init_cutu_and_read_dies_simple (this_cu, dw2_get_file_names_reader, NULL);
+ /* If DWO files are in use, we can still find the DW_AT_stmt_list attribute
+ in the stub for CUs, there's is no need to lookup the DWO file.
+ However, that's not the case for TUs where DW_AT_stmt_list lives in the
+ DWO file. */
+ if (this_cu->is_debug_types)
+ {
+ struct type_unit_group *tu_group = this_cu->s.type_unit_group;
+
+ init_cutu_and_read_dies (tu_group->t.first_tu, NULL, 0, 0,
+ dw2_get_file_names_reader, tu_group);
+ }
+ else
+ init_cutu_and_read_dies_simple (this_cu, dw2_get_file_names_reader, NULL);
if (this_cu->v.quick->no_file_data)
return NULL;
dw2_setup (objfile);
+ dw2_build_type_unit_groups ();
+
for (i = 0; i < (dwarf2_per_objfile->n_comp_units
- + dwarf2_per_objfile->n_type_units); ++i)
+ + dwarf2_per_objfile->n_type_unit_groups); ++i)
{
int j;
- struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
+ struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i);
struct quick_file_names *file_data;
/* We only need to look at symtabs not already expanded. */
}
/* A helper function that expands all symtabs that hold an object
- named NAME. */
+ named NAME. If WANT_SPECIFIC_BLOCK is non-zero, only look for
+ symbols in block BLOCK_KIND. */
static void
-dw2_do_expand_symtabs_matching (struct objfile *objfile, const char *name)
+dw2_do_expand_symtabs_matching (struct objfile *objfile,
+ int want_specific_block,
+ enum block_enum block_kind,
+ const char *name, domain_enum domain)
{
+ struct mapped_index *index;
+
dw2_setup (objfile);
+ index = dwarf2_per_objfile->index_table;
+
/* index_table is NULL if OBJF_READNOW. */
- if (dwarf2_per_objfile->index_table)
+ if (index)
{
offset_type *vec;
- if (find_slot_in_mapped_hash (dwarf2_per_objfile->index_table,
- name, &vec))
+ if (find_slot_in_mapped_hash (index, name, &vec))
{
offset_type i, len = MAYBE_SWAP (*vec);
for (i = 0; i < len; ++i)
{
- offset_type cu_index = MAYBE_SWAP (vec[i + 1]);
+ offset_type cu_index_and_attrs = MAYBE_SWAP (vec[i + 1]);
+ offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs);
struct dwarf2_per_cu_data *per_cu = dw2_get_cu (cu_index);
+ int want_static = block_kind != GLOBAL_BLOCK;
+ /* This value is only valid for index versions >= 7. */
+ int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs);
+ gdb_index_symbol_kind symbol_kind =
+ GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs);
+
+ if (want_specific_block
+ && index->version >= 7
+ && want_static != is_static)
+ continue;
+
+ /* Only check the symbol's kind if it has one.
+ Indices prior to version 7 don't record it. */
+ if (index->version >= 7)
+ {
+ switch (domain)
+ {
+ case VAR_DOMAIN:
+ if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE
+ && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION
+ /* Some types are also in VAR_DOMAIN. */
+ && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE)
+ continue;
+ break;
+ case STRUCT_DOMAIN:
+ if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE)
+ continue;
+ break;
+ case LABEL_DOMAIN:
+ if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER)
+ continue;
+ break;
+ default:
+ break;
+ }
+ }
dw2_instantiate_symtab (per_cu);
}
enum block_enum block_kind, const char *name,
domain_enum domain)
{
- dw2_do_expand_symtabs_matching (objfile, name);
+ dw2_do_expand_symtabs_matching (objfile, 1, block_kind, name, domain);
}
static void
dw2_expand_symtabs_for_function (struct objfile *objfile,
const char *func_name)
{
- dw2_do_expand_symtabs_matching (objfile, func_name);
+ /* Note: It doesn't matter what we pass for block_kind here. */
+ dw2_do_expand_symtabs_matching (objfile, 0, GLOBAL_BLOCK, func_name,
+ VAR_DOMAIN);
}
static void
}
}
+/* A helper function for dw2_find_symbol_file that finds the primary
+ file name for a given CU. This is a die_reader_func. */
+
+static void
+dw2_get_primary_filename_reader (const struct die_reader_specs *reader,
+ gdb_byte *info_ptr,
+ struct die_info *comp_unit_die,
+ int has_children,
+ void *data)
+{
+ const char **result_ptr = data;
+ struct dwarf2_cu *cu = reader->cu;
+ struct attribute *attr;
+
+ attr = dwarf2_attr (comp_unit_die, DW_AT_name, cu);
+ if (attr == NULL)
+ *result_ptr = NULL;
+ else
+ *result_ptr = DW_STRING (attr);
+}
+
static const char *
dw2_find_symbol_file (struct objfile *objfile, const char *name)
{
struct dwarf2_per_cu_data *per_cu;
offset_type *vec;
struct quick_file_names *file_data;
+ const char *filename;
dw2_setup (objfile);
{
struct symtab *s;
- ALL_OBJFILE_SYMTABS (objfile, s)
- if (s->primary)
- {
- struct blockvector *bv = BLOCKVECTOR (s);
- const struct block *block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
- struct symbol *sym = lookup_block_symbol (block, name, VAR_DOMAIN);
+ ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s)
+ {
+ struct blockvector *bv = BLOCKVECTOR (s);
+ const struct block *block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
+ struct symbol *sym = lookup_block_symbol (block, name, VAR_DOMAIN);
- if (sym)
- return sym->symtab->filename;
- }
+ if (sym)
+ return sym->symtab->filename;
+ }
return NULL;
}
should be rewritten so that it doesn't require a custom hook. It
could just use the ordinary symbol tables. */
/* vec[0] is the length, which must always be >0. */
- per_cu = dw2_get_cu (MAYBE_SWAP (vec[1]));
+ per_cu = dw2_get_cu (GDB_INDEX_CU_VALUE (MAYBE_SWAP (vec[1])));
- file_data = dw2_get_file_names (objfile, per_cu);
- if (file_data == NULL)
- return NULL;
+ if (per_cu->v.quick->symtab != NULL)
+ return per_cu->v.quick->symtab->filename;
- return file_data->file_names[file_data->num_file_names - 1];
+ init_cutu_and_read_dies (per_cu, NULL, 0, 0,
+ dw2_get_primary_filename_reader, &filename);
+
+ return filename;
}
static void
struct cleanup *cleanup;
htab_t visited_found, visited_not_found;
+ dw2_build_type_unit_groups ();
+
visited_found = htab_create_alloc (10,
htab_hash_pointer, htab_eq_pointer,
NULL, xcalloc, xfree);
make_cleanup_htab_delete (visited_not_found);
for (i = 0; i < (dwarf2_per_objfile->n_comp_units
- + dwarf2_per_objfile->n_type_units); ++i)
+ + dwarf2_per_objfile->n_type_unit_groups); ++i)
{
int j;
- struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
+ struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i);
struct quick_file_names *file_data;
void **slot;
for (vec_idx = 0; vec_idx < vec_len; ++vec_idx)
{
struct dwarf2_per_cu_data *per_cu;
+ offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]);
+ gdb_index_symbol_kind symbol_kind =
+ GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs);
+ int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs);
+
+ /* Don't crash on bad data. */
+ if (cu_index >= (dwarf2_per_objfile->n_comp_units
+ + dwarf2_per_objfile->n_type_units))
+ continue;
+
+ /* Only check the symbol's kind if it has one.
+ Indices prior to version 7 don't record it. */
+ if (index->version >= 7)
+ {
+ switch (kind)
+ {
+ case VARIABLES_DOMAIN:
+ if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE)
+ continue;
+ break;
+ case FUNCTIONS_DOMAIN:
+ if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION)
+ continue;
+ break;
+ case TYPES_DOMAIN:
+ if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE)
+ continue;
+ break;
+ default:
+ break;
+ }
+ }
- per_cu = dw2_get_cu (MAYBE_SWAP (vec[vec_idx + 1]));
+ per_cu = dw2_get_cu (cu_index);
if (file_matcher == NULL || per_cu->v.quick->mark)
dw2_instantiate_symtab (per_cu);
}
}
}
+/* A helper for dw2_find_pc_sect_symtab which finds the most specific
+ symtab. */
+
+static struct symtab *
+recursively_find_pc_sect_symtab (struct symtab *symtab, CORE_ADDR pc)
+{
+ int i;
+
+ if (BLOCKVECTOR (symtab) != NULL
+ && blockvector_contains_pc (BLOCKVECTOR (symtab), pc))
+ return symtab;
+
+ if (symtab->includes == NULL)
+ return NULL;
+
+ for (i = 0; symtab->includes[i]; ++i)
+ {
+ struct symtab *s = symtab->includes[i];
+
+ s = recursively_find_pc_sect_symtab (s, pc);
+ if (s != NULL)
+ return s;
+ }
+
+ return NULL;
+}
+
static struct symtab *
dw2_find_pc_sect_symtab (struct objfile *objfile,
struct minimal_symbol *msymbol,
int warn_if_readin)
{
struct dwarf2_per_cu_data *data;
+ struct symtab *result;
dw2_setup (objfile);
warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
paddress (get_objfile_arch (objfile), pc));
- return dw2_instantiate_symtab (data);
+ result = recursively_find_pc_sect_symtab (dw2_instantiate_symtab (data), pc);
+ gdb_assert (result != NULL);
+ return result;
}
static void
cleanup = make_cleanup_htab_delete (visited);
dw2_setup (objfile);
+ dw2_build_type_unit_groups ();
+
/* We can ignore file names coming from already-expanded CUs. */
for (i = 0; i < (dwarf2_per_objfile->n_comp_units
+ dwarf2_per_objfile->n_type_units); ++i)
}
for (i = 0; i < (dwarf2_per_objfile->n_comp_units
- + dwarf2_per_objfile->n_type_units); ++i)
+ + dwarf2_per_objfile->n_type_unit_groups); ++i)
{
int j;
- struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
+ struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i);
struct quick_file_names *file_data;
void **slot;
dwarf2_build_psymtabs_hard (objfile);
}
+/* Return the total length of the CU described by HEADER. */
+
+static unsigned int
+get_cu_length (const struct comp_unit_head *header)
+{
+ return header->initial_length_size + header->length;
+}
+
/* Return TRUE if OFFSET is within CU_HEADER. */
static inline int
offset_in_cu_p (const struct comp_unit_head *cu_header, sect_offset offset)
{
sect_offset bottom = { cu_header->offset.sect_off };
- sect_offset top = { (cu_header->offset.sect_off + cu_header->length
- + cu_header->initial_length_size) };
+ sect_offset top = { cu_header->offset.sect_off + get_cu_length (cu_header) };
return (offset.sect_off >= bottom.sect_off && offset.sect_off < top.sect_off);
}
+/* Find the base address of the compilation unit for range lists and
+ location lists. It will normally be specified by DW_AT_low_pc.
+ In DWARF-3 draft 4, the base address could be overridden by
+ DW_AT_entry_pc. It's been removed, but GCC still uses this for
+ compilation units with discontinuous ranges. */
+
+static void
+dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct attribute *attr;
+
+ cu->base_known = 0;
+ cu->base_address = 0;
+
+ attr = dwarf2_attr (die, DW_AT_entry_pc, cu);
+ if (attr)
+ {
+ cu->base_address = DW_ADDR (attr);
+ cu->base_known = 1;
+ }
+ else
+ {
+ attr = dwarf2_attr (die, DW_AT_low_pc, cu);
+ if (attr)
+ {
+ cu->base_address = DW_ADDR (attr);
+ cu->base_known = 1;
+ }
+ }
+}
+
/* Read in the comp unit header information from the debug_info at info_ptr.
NOTE: This leaves members offset, first_die_offset to be filled in
by the caller. */
return info_ptr;
}
+/* Helper function that returns the proper abbrev section for
+ THIS_CU. */
+
+static struct dwarf2_section_info *
+get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu)
+{
+ struct dwarf2_section_info *abbrev;
+
+ if (this_cu->is_dwz)
+ abbrev = &dwarf2_get_dwz_file ()->abbrev;
+ else
+ abbrev = &dwarf2_per_objfile->abbrev;
+
+ return abbrev;
+}
+
/* Subroutine of read_and_check_comp_unit_head and
read_and_check_type_unit_head to simplify them.
Perform various error checking on the header. */
static void
error_check_comp_unit_head (struct comp_unit_head *header,
- struct dwarf2_section_info *section)
+ struct dwarf2_section_info *section,
+ struct dwarf2_section_info *abbrev_section)
{
bfd *abfd = section->asection->owner;
const char *filename = bfd_get_filename (abfd);
filename);
if (header->abbrev_offset.sect_off
- >= dwarf2_section_size (dwarf2_per_objfile->objfile,
- &dwarf2_per_objfile->abbrev))
+ >= dwarf2_section_size (dwarf2_per_objfile->objfile, abbrev_section))
error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
"(offset 0x%lx + 6) [in module %s]"),
(long) header->abbrev_offset.sect_off, (long) header->offset.sect_off,
/* Cast to unsigned long to use 64-bit arithmetic when possible to
avoid potential 32-bit overflow. */
- if (((unsigned long) header->offset.sect_off
- + header->length + header->initial_length_size)
+ if (((unsigned long) header->offset.sect_off + get_cu_length (header))
> section->size)
error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
"(offset 0x%lx + 0) [in module %s]"),
static gdb_byte *
read_and_check_comp_unit_head (struct comp_unit_head *header,
struct dwarf2_section_info *section,
+ struct dwarf2_section_info *abbrev_section,
gdb_byte *info_ptr,
int is_debug_types_section)
{
header->first_die_offset.cu_off = info_ptr - beg_of_comp_unit;
- error_check_comp_unit_head (header, section);
+ error_check_comp_unit_head (header, section, abbrev_section);
return info_ptr;
}
static gdb_byte *
read_and_check_type_unit_head (struct comp_unit_head *header,
struct dwarf2_section_info *section,
+ struct dwarf2_section_info *abbrev_section,
gdb_byte *info_ptr,
ULONGEST *signature,
cu_offset *type_offset_in_tu)
header->first_die_offset.cu_off = info_ptr - beg_of_comp_unit;
- error_check_comp_unit_head (header, section);
+ error_check_comp_unit_head (header, section, abbrev_section);
return info_ptr;
}
+/* Fetch the abbreviation table offset from a comp or type unit header. */
+
+static sect_offset
+read_abbrev_offset (struct dwarf2_section_info *section,
+ sect_offset offset)
+{
+ bfd *abfd = section->asection->owner;
+ gdb_byte *info_ptr;
+ unsigned int length, initial_length_size, offset_size;
+ sect_offset abbrev_offset;
+
+ dwarf2_read_section (dwarf2_per_objfile->objfile, section);
+ info_ptr = section->buffer + offset.sect_off;
+ length = read_initial_length (abfd, info_ptr, &initial_length_size);
+ offset_size = initial_length_size == 4 ? 4 : 8;
+ info_ptr += initial_length_size + 2 /*version*/;
+ abbrev_offset.sect_off = read_offset_1 (abfd, info_ptr, offset_size);
+ return abbrev_offset;
+}
+
/* Allocate a new partial symtab for file named NAME and mark this new
partial symtab as being an include of PST. */
struct die_info *die,
struct partial_symtab *pst)
{
- struct objfile *objfile = cu->objfile;
- bfd *abfd = objfile->obfd;
struct line_header *lh = NULL;
struct attribute *attr;
attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
if (attr)
- {
- unsigned int line_offset = DW_UNSND (attr);
-
- lh = dwarf_decode_line_header (line_offset, abfd, cu);
- }
+ lh = dwarf_decode_line_header (DW_UNSND (attr), cu);
if (lh == NULL)
return; /* No linetable, so no includes. */
add_signatured_type_cu_to_table (void **slot, void *datum)
{
struct signatured_type *sigt = *slot;
- struct dwarf2_per_cu_data ***datap = datum;
+ struct signatured_type ***datap = datum;
- **datap = &sigt->per_cu;
+ **datap = sigt;
++*datap;
return 1;
}
-/* Create the hash table of all entries in the .debug_types section(s).
- The result is zero if there are no .debug_types sections,
- otherwise non-zero. */
+/* Create the hash table of all entries in the .debug_types section.
+ DWO_FILE is a pointer to the DWO file for .debug_types.dwo, NULL otherwise.
+ The result is a pointer to the hash table or NULL if there are
+ no types. */
-static int
-create_all_type_units (struct objfile *objfile)
+static htab_t
+create_debug_types_hash_table (struct dwo_file *dwo_file,
+ VEC (dwarf2_section_info_def) *types)
{
- struct bfd *abfd = objfile->obfd;
+ struct objfile *objfile = dwarf2_per_objfile->objfile;
htab_t types_htab = NULL;
- struct dwarf2_per_cu_data **iter;
int ix;
struct dwarf2_section_info *section;
+ struct dwarf2_section_info *abbrev_section;
- if (VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types))
- {
- dwarf2_per_objfile->signatured_types = NULL;
- return 0;
- }
+ if (VEC_empty (dwarf2_section_info_def, types))
+ return NULL;
+
+ abbrev_section = (dwo_file != NULL
+ ? &dwo_file->sections.abbrev
+ : &dwarf2_per_objfile->abbrev);
+
+ if (dwarf2_read_debug)
+ fprintf_unfiltered (gdb_stdlog, "Reading .debug_types%s for %s:\n",
+ dwo_file ? ".dwo" : "",
+ bfd_get_filename (abbrev_section->asection->owner));
for (ix = 0;
- VEC_iterate (dwarf2_section_info_def, dwarf2_per_objfile->types,
- ix, section);
+ VEC_iterate (dwarf2_section_info_def, types, ix, section);
++ix)
{
+ bfd *abfd;
gdb_byte *info_ptr, *end_ptr;
+ struct dwarf2_section_info *abbrev_section;
dwarf2_read_section (objfile, section);
info_ptr = section->buffer;
if (info_ptr == NULL)
continue;
- if (types_htab == NULL)
- types_htab = allocate_signatured_type_table (objfile);
+ /* We can't set abfd until now because the section may be empty or
+ not present, in which case section->asection will be NULL. */
+ abfd = section->asection->owner;
- if (dwarf2_die_debug)
- fprintf_unfiltered (gdb_stdlog, "Reading signatured types for %s:\n",
- bfd_get_filename (abfd));
+ if (dwo_file)
+ abbrev_section = &dwo_file->sections.abbrev;
+ else
+ abbrev_section = &dwarf2_per_objfile->abbrev;
+
+ if (types_htab == NULL)
+ {
+ if (dwo_file)
+ types_htab = allocate_dwo_unit_table (objfile);
+ else
+ types_htab = allocate_signatured_type_table (objfile);
+ }
/* We don't use init_cutu_and_read_dies_simple, or some such, here
because we don't need to read any dies: the signature is in the
while (info_ptr < end_ptr)
{
sect_offset offset;
- cu_offset type_offset;
+ cu_offset type_offset_in_tu;
ULONGEST signature;
struct signatured_type *sig_type;
+ struct dwo_unit *dwo_tu;
void **slot;
gdb_byte *ptr = info_ptr;
struct comp_unit_head header;
/* We need to read the type's signature in order to build the hash
table, but we don't need anything else just yet. */
- ptr = read_and_check_type_unit_head (&header, section, ptr,
- &signature, &type_offset);
+ ptr = read_and_check_type_unit_head (&header, section,
+ abbrev_section, ptr,
+ &signature, &type_offset_in_tu);
- length = header.initial_length_size + header.length;
+ length = get_cu_length (&header);
/* Skip dummy type units. */
if (ptr >= info_ptr + length
|| peek_abbrev_code (abfd, ptr) == 0)
{
- info_ptr += header.initial_length_size + header.length;
+ info_ptr += length;
continue;
}
- sig_type = obstack_alloc (&objfile->objfile_obstack, sizeof (*sig_type));
- memset (sig_type, 0, sizeof (*sig_type));
- sig_type->signature = signature;
- sig_type->type_offset = type_offset;
- sig_type->per_cu.objfile = objfile;
- sig_type->per_cu.debug_types_section = section;
- sig_type->per_cu.offset = offset;
+ if (dwo_file)
+ {
+ sig_type = NULL;
+ dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack,
+ struct dwo_unit);
+ dwo_tu->dwo_file = dwo_file;
+ dwo_tu->signature = signature;
+ dwo_tu->type_offset_in_tu = type_offset_in_tu;
+ dwo_tu->info_or_types_section = section;
+ dwo_tu->offset = offset;
+ dwo_tu->length = length;
+ }
+ else
+ {
+ /* N.B.: type_offset is not usable if this type uses a DWO file.
+ The real type_offset is in the DWO file. */
+ dwo_tu = NULL;
+ sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack,
+ struct signatured_type);
+ sig_type->signature = signature;
+ sig_type->type_offset_in_tu = type_offset_in_tu;
+ sig_type->per_cu.objfile = objfile;
+ sig_type->per_cu.is_debug_types = 1;
+ sig_type->per_cu.info_or_types_section = section;
+ sig_type->per_cu.offset = offset;
+ sig_type->per_cu.length = length;
+ }
- slot = htab_find_slot (types_htab, sig_type, INSERT);
+ slot = htab_find_slot (types_htab,
+ dwo_file ? (void*) dwo_tu : (void *) sig_type,
+ INSERT);
gdb_assert (slot != NULL);
if (*slot != NULL)
{
- const struct signatured_type *dup_sig = *slot;
+ sect_offset dup_offset;
+
+ if (dwo_file)
+ {
+ const struct dwo_unit *dup_tu = *slot;
+
+ dup_offset = dup_tu->offset;
+ }
+ else
+ {
+ const struct signatured_type *dup_tu = *slot;
+
+ dup_offset = dup_tu->per_cu.offset;
+ }
complaint (&symfile_complaints,
_("debug type entry at offset 0x%x is duplicate to the "
"entry at offset 0x%x, signature 0x%s"),
- offset.sect_off, dup_sig->per_cu.offset.sect_off,
+ offset.sect_off, dup_offset.sect_off,
phex (signature, sizeof (signature)));
- gdb_assert (signature == dup_sig->signature);
}
- *slot = sig_type;
+ *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type;
- if (dwarf2_die_debug)
+ if (dwarf2_read_debug)
fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature 0x%s\n",
offset.sect_off,
phex (signature, sizeof (signature)));
}
}
+ return types_htab;
+}
+
+/* Create the hash table of all entries in the .debug_types section,
+ and initialize all_type_units.
+ The result is zero if there is an error (e.g. missing .debug_types section),
+ otherwise non-zero. */
+
+static int
+create_all_type_units (struct objfile *objfile)
+{
+ htab_t types_htab;
+ struct signatured_type **iter;
+
+ types_htab = create_debug_types_hash_table (NULL, dwarf2_per_objfile->types);
+ if (types_htab == NULL)
+ {
+ dwarf2_per_objfile->signatured_types = NULL;
+ return 0;
+ }
+
dwarf2_per_objfile->signatured_types = types_htab;
dwarf2_per_objfile->n_type_units = htab_elements (types_htab);
dwarf2_per_objfile->all_type_units
= obstack_alloc (&objfile->objfile_obstack,
dwarf2_per_objfile->n_type_units
- * sizeof (struct dwarf2_per_cu_data *));
+ * sizeof (struct signatured_type *));
iter = &dwarf2_per_objfile->all_type_units[0];
htab_traverse_noresize (types_htab, add_signatured_type_cu_to_table, &iter);
gdb_assert (iter - &dwarf2_per_objfile->all_type_units[0]
entry = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
return entry;
}
+\f
+/* Low level DIE reading support. */
/* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
static void
init_cu_die_reader (struct die_reader_specs *reader,
struct dwarf2_cu *cu,
- struct dwarf2_section_info *section)
+ struct dwarf2_section_info *section,
+ struct dwo_file *dwo_file)
{
- gdb_assert (section->readin);
+ gdb_assert (section->readin && section->buffer != NULL);
reader->abfd = section->asection->owner;
reader->cu = cu;
+ reader->dwo_file = dwo_file;
reader->die_section = section;
reader->buffer = section->buffer;
+ reader->buffer_end = section->buffer + section->size;
}
-/* Find the base address of the compilation unit for range lists and
- location lists. It will normally be specified by DW_AT_low_pc.
- In DWARF-3 draft 4, the base address could be overridden by
- DW_AT_entry_pc. It's been removed, but GCC still uses this for
- compilation units with discontinuous ranges. */
-
-static void
-dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu)
-{
- struct attribute *attr;
-
- cu->base_known = 0;
- cu->base_address = 0;
-
- attr = dwarf2_attr (die, DW_AT_entry_pc, cu);
- if (attr)
- {
- cu->base_address = DW_ADDR (attr);
- cu->base_known = 1;
- }
- else
- {
- attr = dwarf2_attr (die, DW_AT_low_pc, cu);
- if (attr)
- {
- cu->base_address = DW_ADDR (attr);
- cu->base_known = 1;
- }
- }
-}
+/* Initialize a CU (or TU) and read its DIEs.
+ If the CU defers to a DWO file, read the DWO file as well.
-/* Subroutine of init_{cu,tu}_and_read_dies.
- Do all the work necessary to initialize THIS_CU->cu and read in its DIE(s).
+ ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
+ Otherwise the table specified in the comp unit header is read in and used.
+ This is an optimization for when we already have the abbrev table.
If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
Otherwise, a new CU is allocated with xmalloc.
read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
- linker) then DIE_READER_FUNC will not get called.
-
- FIXME: As an implementation detail between our callers and us,
- USE_EXISTING_CU and KEEP are OK. But bubbling them up into their callers
- isn't as clean as I'd like. Having more callers with good names
- may be the way to go. */
+ linker) then DIE_READER_FUNC will not get called. */
static void
-init_and_read_dies_worker (struct dwarf2_per_cu_data *this_cu,
- int use_existing_cu, int keep,
- die_reader_func_ftype *die_reader_func,
- void *data)
+init_cutu_and_read_dies (struct dwarf2_per_cu_data *this_cu,
+ struct abbrev_table *abbrev_table,
+ int use_existing_cu, int keep,
+ die_reader_func_ftype *die_reader_func,
+ void *data)
{
struct objfile *objfile = dwarf2_per_objfile->objfile;
- struct dwarf2_section_info *section;
- bfd *abfd;
+ struct dwarf2_section_info *section = this_cu->info_or_types_section;
+ bfd *abfd = section->asection->owner;
struct dwarf2_cu *cu;
gdb_byte *begin_info_ptr, *info_ptr;
struct die_reader_specs reader;
struct attribute *attr;
struct cleanup *cleanups, *free_cu_cleanup = NULL;
struct signatured_type *sig_type = NULL;
+ struct dwarf2_section_info *abbrev_section;
+ /* Non-zero if CU currently points to a DWO file and we need to
+ reread it. When this happens we need to reread the skeleton die
+ before we can reread the DWO file. */
+ int rereading_dwo_cu = 0;
+
+ if (dwarf2_die_debug)
+ fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n",
+ this_cu->is_debug_types ? "type" : "comp",
+ this_cu->offset.sect_off);
if (use_existing_cu)
gdb_assert (keep);
- if (this_cu->debug_types_section)
- gdb_assert (! use_existing_cu);
-
- if (this_cu->debug_types_section)
- section = this_cu->debug_types_section;
- else
- section = &dwarf2_per_objfile->info;
- abfd = section->asection->owner;
cleanups = make_cleanup (null_cleanup, NULL);
begin_info_ptr = info_ptr = section->buffer + this_cu->offset.sect_off;
+ abbrev_section = get_abbrev_section_for_cu (this_cu);
+
if (use_existing_cu && this_cu->cu != NULL)
{
cu = this_cu->cu;
- info_ptr += cu->header.first_die_offset.cu_off;
+
+ /* If this CU is from a DWO file we need to start over, we need to
+ refetch the attributes from the skeleton CU.
+ This could be optimized by retrieving those attributes from when we
+ were here the first time: the previous comp_unit_die was stored in
+ comp_unit_obstack. But there's no data yet that we need this
+ optimization. */
+ if (cu->dwo_unit != NULL)
+ rereading_dwo_cu = 1;
}
else
{
/* If an error occurs while loading, release our storage. */
free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu);
+ }
- if (this_cu->debug_types_section)
+ if (cu->header.first_die_offset.cu_off != 0 && ! rereading_dwo_cu)
+ {
+ /* We already have the header, there's no need to read it in again. */
+ info_ptr += cu->header.first_die_offset.cu_off;
+ }
+ else
+ {
+ if (this_cu->is_debug_types)
{
ULONGEST signature;
-
- info_ptr = read_and_check_type_unit_head (&cu->header,
- section, info_ptr,
- &signature, NULL);
-
- /* There's no way to get from PER_CU to its containing
- struct signatured_type.
- But we have the signature so we can use that. */
- sig_type = lookup_signatured_type (signature);
- /* We've already scanned all the signatured types,
- this must succeed. */
- gdb_assert (sig_type != NULL);
- gdb_assert (&sig_type->per_cu == this_cu);
+ cu_offset type_offset_in_tu;
+
+ info_ptr = read_and_check_type_unit_head (&cu->header, section,
+ abbrev_section, info_ptr,
+ &signature,
+ &type_offset_in_tu);
+
+ /* Since per_cu is the first member of struct signatured_type,
+ we can go from a pointer to one to a pointer to the other. */
+ sig_type = (struct signatured_type *) this_cu;
+ gdb_assert (sig_type->signature == signature);
+ gdb_assert (sig_type->type_offset_in_tu.cu_off
+ == type_offset_in_tu.cu_off);
gdb_assert (this_cu->offset.sect_off == cu->header.offset.sect_off);
- /* LENGTH has not been set yet for type units. */
- this_cu->length = cu->header.length + cu->header.initial_length_size;
+ /* LENGTH has not been set yet for type units if we're
+ using .gdb_index. */
+ this_cu->length = get_cu_length (&cu->header);
+
+ /* Establish the type offset that can be used to lookup the type. */
+ sig_type->type_offset_in_section.sect_off =
+ this_cu->offset.sect_off + sig_type->type_offset_in_tu.cu_off;
}
else
{
- info_ptr = read_and_check_comp_unit_head (&cu->header,
- section, info_ptr, 0);
+ info_ptr = read_and_check_comp_unit_head (&cu->header, section,
+ abbrev_section,
+ info_ptr, 0);
gdb_assert (this_cu->offset.sect_off == cu->header.offset.sect_off);
- gdb_assert (this_cu->length
- == cu->header.length + cu->header.initial_length_size);
+ gdb_assert (this_cu->length == get_cu_length (&cu->header));
}
}
return;
}
- /* Read the abbrevs for this compilation unit into a table. */
- if (cu->dwarf2_abbrevs == NULL)
+ /* If we don't have them yet, read the abbrevs for this compilation unit.
+ And if we need to read them now, make sure they're freed when we're
+ done. Note that it's important that if the CU had an abbrev table
+ on entry we don't free it when we're done: Somewhere up the call stack
+ it may be in use. */
+ if (abbrev_table != NULL)
+ {
+ gdb_assert (cu->abbrev_table == NULL);
+ gdb_assert (cu->header.abbrev_offset.sect_off
+ == abbrev_table->offset.sect_off);
+ cu->abbrev_table = abbrev_table;
+ }
+ else if (cu->abbrev_table == NULL)
{
- dwarf2_read_abbrevs (cu, &dwarf2_per_objfile->abbrev);
+ dwarf2_read_abbrevs (cu, abbrev_section);
make_cleanup (dwarf2_free_abbrev_table, cu);
}
+ else if (rereading_dwo_cu)
+ {
+ dwarf2_free_abbrev_table (cu);
+ dwarf2_read_abbrevs (cu, abbrev_section);
+ }
/* Read the top level CU/TU die. */
- init_cu_die_reader (&reader, cu, section);
+ init_cu_die_reader (&reader, cu, section, NULL);
info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children);
+ /* If we have a DWO stub, process it and then read in the DWO file.
+ Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains
+ a DWO CU, that this test will fail. */
+ attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu);
+ if (attr)
+ {
+ char *dwo_name = DW_STRING (attr);
+ const char *comp_dir_string;
+ struct dwo_unit *dwo_unit;
+ ULONGEST signature; /* Or dwo_id. */
+ struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges;
+ int i,num_extra_attrs;
+ struct dwarf2_section_info *dwo_abbrev_section;
+
+ if (has_children)
+ error (_("Dwarf Error: compilation unit with DW_AT_GNU_dwo_name"
+ " has children (offset 0x%x) [in module %s]"),
+ this_cu->offset.sect_off, bfd_get_filename (abfd));
+
+ /* These attributes aren't processed until later:
+ DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
+ However, the attribute is found in the stub which we won't have later.
+ In order to not impose this complication on the rest of the code,
+ we read them here and copy them to the DWO CU/TU die. */
+
+ /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
+ DWO file. */
+ stmt_list = NULL;
+ if (! this_cu->is_debug_types)
+ stmt_list = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu);
+ low_pc = dwarf2_attr (comp_unit_die, DW_AT_low_pc, cu);
+ high_pc = dwarf2_attr (comp_unit_die, DW_AT_high_pc, cu);
+ ranges = dwarf2_attr (comp_unit_die, DW_AT_ranges, cu);
+ comp_dir = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, cu);
+
+ /* There should be a DW_AT_addr_base attribute here (if needed).
+ We need the value before we can process DW_FORM_GNU_addr_index. */
+ cu->addr_base = 0;
+ attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_addr_base, cu);
+ if (attr)
+ cu->addr_base = DW_UNSND (attr);
+
+ /* There should be a DW_AT_ranges_base attribute here (if needed).
+ We need the value before we can process DW_AT_ranges. */
+ cu->ranges_base = 0;
+ attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_ranges_base, cu);
+ if (attr)
+ cu->ranges_base = DW_UNSND (attr);
+
+ if (this_cu->is_debug_types)
+ {
+ gdb_assert (sig_type != NULL);
+ signature = sig_type->signature;
+ }
+ else
+ {
+ attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu);
+ if (! attr)
+ error (_("Dwarf Error: missing dwo_id [in module %s]"),
+ dwo_name);
+ signature = DW_UNSND (attr);
+ }
+
+ /* We may need the comp_dir in order to find the DWO file. */
+ comp_dir_string = NULL;
+ if (comp_dir)
+ comp_dir_string = DW_STRING (comp_dir);
+
+ if (this_cu->is_debug_types)
+ dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir_string);
+ else
+ dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir_string,
+ signature);
+
+ if (dwo_unit == NULL)
+ {
+ error (_("Dwarf Error: CU at offset 0x%x references unknown DWO"
+ " with ID %s [in module %s]"),
+ this_cu->offset.sect_off,
+ phex (signature, sizeof (signature)),
+ objfile->name);
+ }
+
+ /* Set up for reading the DWO CU/TU. */
+ cu->dwo_unit = dwo_unit;
+ section = dwo_unit->info_or_types_section;
+ begin_info_ptr = info_ptr = section->buffer + dwo_unit->offset.sect_off;
+ dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev;
+ init_cu_die_reader (&reader, cu, section, dwo_unit->dwo_file);
+
+ if (this_cu->is_debug_types)
+ {
+ ULONGEST signature;
+
+ info_ptr = read_and_check_type_unit_head (&cu->header, section,
+ dwo_abbrev_section,
+ info_ptr,
+ &signature, NULL);
+ gdb_assert (sig_type->signature == signature);
+ gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off);
+ gdb_assert (dwo_unit->length == get_cu_length (&cu->header));
+
+ /* Establish the type offset that can be used to lookup the type.
+ For DWO files, we don't know it until now. */
+ sig_type->type_offset_in_section.sect_off =
+ dwo_unit->offset.sect_off + dwo_unit->type_offset_in_tu.cu_off;
+ }
+ else
+ {
+ info_ptr = read_and_check_comp_unit_head (&cu->header, section,
+ dwo_abbrev_section,
+ info_ptr, 0);
+ gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off);
+ gdb_assert (dwo_unit->length == get_cu_length (&cu->header));
+ }
+
+ /* Discard the original CU's abbrev table, and read the DWO's. */
+ if (abbrev_table == NULL)
+ {
+ dwarf2_free_abbrev_table (cu);
+ dwarf2_read_abbrevs (cu, dwo_abbrev_section);
+ }
+ else
+ {
+ dwarf2_read_abbrevs (cu, dwo_abbrev_section);
+ make_cleanup (dwarf2_free_abbrev_table, cu);
+ }
+
+ /* Read in the die, but leave space to copy over the attributes
+ from the stub. This has the benefit of simplifying the rest of
+ the code - all the real work is done here. */
+ num_extra_attrs = ((stmt_list != NULL)
+ + (low_pc != NULL)
+ + (high_pc != NULL)
+ + (ranges != NULL)
+ + (comp_dir != NULL));
+ info_ptr = read_full_die_1 (&reader, &comp_unit_die, info_ptr,
+ &has_children, num_extra_attrs);
+
+ /* Copy over the attributes from the stub to the DWO die. */
+ i = comp_unit_die->num_attrs;
+ if (stmt_list != NULL)
+ comp_unit_die->attrs[i++] = *stmt_list;
+ if (low_pc != NULL)
+ comp_unit_die->attrs[i++] = *low_pc;
+ if (high_pc != NULL)
+ comp_unit_die->attrs[i++] = *high_pc;
+ if (ranges != NULL)
+ comp_unit_die->attrs[i++] = *ranges;
+ if (comp_dir != NULL)
+ comp_unit_die->attrs[i++] = *comp_dir;
+ comp_unit_die->num_attrs += num_extra_attrs;
+
+ /* Skip dummy compilation units. */
+ if (info_ptr >= begin_info_ptr + dwo_unit->length
+ || peek_abbrev_code (abfd, info_ptr) == 0)
+ {
+ do_cleanups (cleanups);
+ return;
+ }
+ }
+
die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data);
if (free_cu_cleanup != NULL)
do_cleanups (cleanups);
}
-/* Main entry point for reading a CU.
- Do all the work necessary to initialize THIS_CU->cu and read in its DIE(s).
-
- If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
- Otherwise, a new CU is allocated with xmalloc.
-
- If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
- read_in_chain. Otherwise the dwarf2_cu data is freed at the end. */
-
-static void
-init_cu_and_read_dies (struct dwarf2_per_cu_data *this_cu,
- int use_existing_cu, int keep,
- die_reader_func_ftype *die_reader_func,
- void *data)
-{
- init_and_read_dies_worker (this_cu, use_existing_cu, keep,
- die_reader_func, data);
-}
-
-/* Main entry point for reading a TU.
- Do all the work necessary to initialize THIS_CU->cu and read in its DIE(s).
-
- If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
- read_in_chain. Otherwise the dwarf2_cu data is freed at the end. */
-
-static void
-init_tu_and_read_dies (struct dwarf2_per_cu_data *this_cu,
- int keep,
- die_reader_func_ftype *die_reader_func,
- void *data)
-{
- gdb_assert (this_cu->debug_types_section);
- init_and_read_dies_worker (this_cu, 0, keep, die_reader_func, data);
-}
-
-/* Read the CU/TU at OFFSET in section SECTION.
+/* Read CU/TU THIS_CU in section SECTION,
+ but do not follow DW_AT_GNU_dwo_name if present.
+ DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed to
+ have already done the lookup to find the DWO file).
The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
- THIS_CU->debug_types_section, but nothing else.
+ THIS_CU->is_debug_types, but nothing else.
We fill in THIS_CU->length.
linker) then DIE_READER_FUNC will not get called.
THIS_CU->cu is always freed when done.
- [This is done for Fission reasons, to be specified.] */
+ This is done in order to not leave THIS_CU->cu in a state where we have
+ to care whether it refers to the "main" CU or the DWO CU. */
static void
init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data *this_cu,
struct dwarf2_section_info *abbrev_section,
+ struct dwo_file *dwo_file,
die_reader_func_ftype *die_reader_func,
void *data)
{
struct objfile *objfile = dwarf2_per_objfile->objfile;
- struct dwarf2_section_info *section;
- bfd *abfd;
+ struct dwarf2_section_info *section = this_cu->info_or_types_section;
+ bfd *abfd = section->asection->owner;
struct dwarf2_cu cu;
gdb_byte *begin_info_ptr, *info_ptr;
struct die_reader_specs reader;
struct die_info *comp_unit_die;
int has_children;
- gdb_assert (this_cu->cu == NULL);
+ if (dwarf2_die_debug)
+ fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n",
+ this_cu->is_debug_types ? "type" : "comp",
+ this_cu->offset.sect_off);
- if (this_cu->debug_types_section)
- section = this_cu->debug_types_section;
- else
- section = &dwarf2_per_objfile->info;
- abfd = section->asection->owner;
+ gdb_assert (this_cu->cu == NULL);
/* This is cheap if the section is already read in. */
dwarf2_read_section (objfile, section);
cleanups = make_cleanup (free_stack_comp_unit, &cu);
begin_info_ptr = info_ptr = section->buffer + this_cu->offset.sect_off;
- info_ptr = read_and_check_comp_unit_head (&cu.header, section, info_ptr,
- this_cu->debug_types_section != NULL);
+ info_ptr = read_and_check_comp_unit_head (&cu.header, section,
+ abbrev_section, info_ptr,
+ this_cu->is_debug_types);
- this_cu->length = cu.header.length + cu.header.initial_length_size;
+ this_cu->length = get_cu_length (&cu.header);
/* Skip dummy compilation units. */
if (info_ptr >= begin_info_ptr + this_cu->length
dwarf2_read_abbrevs (&cu, abbrev_section);
make_cleanup (dwarf2_free_abbrev_table, &cu);
- init_cu_die_reader (&reader, &cu, section);
+ init_cu_die_reader (&reader, &cu, section, dwo_file);
info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children);
die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data);
do_cleanups (cleanups);
}
-/* Read a CU/TU.
- [This is a separate routine for Fission, to be specified.]
+/* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
+ does not lookup the specified DWO file.
+ This cannot be used to read DWO files.
THIS_CU->cu is always freed when done.
- [This is done for Fission reasons, to be specified.] */
+ This is done in order to not leave THIS_CU->cu in a state where we have
+ to care whether it refers to the "main" CU or the DWO CU.
+ We can revisit this if the data shows there's a performance issue. */
static void
init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data *this_cu,
void *data)
{
init_cutu_and_read_dies_no_follow (this_cu,
- &dwarf2_per_objfile->abbrev,
+ get_abbrev_section_for_cu (this_cu),
+ NULL,
die_reader_func, data);
}
+/* Create a psymtab named NAME and assign it to PER_CU.
+
+ The caller must fill in the following details:
+ dirname, textlow, texthigh. */
+
+static struct partial_symtab *
+create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name)
+{
+ struct objfile *objfile = per_cu->objfile;
+ struct partial_symtab *pst;
+
+ pst = start_psymtab_common (objfile, objfile->section_offsets,
+ name, 0,
+ objfile->global_psymbols.next,
+ objfile->static_psymbols.next);
+
+ pst->psymtabs_addrmap_supported = 1;
+
+ /* This is the glue that links PST into GDB's symbol API. */
+ pst->read_symtab_private = per_cu;
+ pst->read_symtab = dwarf2_psymtab_to_symtab;
+ per_cu->v.psymtab = pst;
+
+ return pst;
+}
+
/* die_reader_func for process_psymtab_comp_unit. */
static void
struct dwarf2_cu *cu = reader->cu;
struct objfile *objfile = cu->objfile;
struct dwarf2_per_cu_data *per_cu = cu->per_cu;
- bfd *abfd = objfile->obfd;
struct attribute *attr;
CORE_ADDR baseaddr;
CORE_ADDR best_lowpc = 0, best_highpc = 0;
struct partial_symtab *pst;
int has_pc_info;
const char *filename;
+ int *want_partial_unit_ptr = data;
- if (comp_unit_die->tag == DW_TAG_partial_unit)
+ if (comp_unit_die->tag == DW_TAG_partial_unit
+ && (want_partial_unit_ptr == NULL
+ || !*want_partial_unit_ptr))
return;
- prepare_one_comp_unit (cu, comp_unit_die);
+ gdb_assert (! per_cu->is_debug_types);
+
+ prepare_one_comp_unit (cu, comp_unit_die, language_minimal);
cu->list_in_scope = &file_symbols;
filename = "";
else
filename = DW_STRING (attr);
- pst = start_psymtab_common (objfile, objfile->section_offsets,
- filename,
- /* TEXTLOW and TEXTHIGH are set below. */
- 0,
- objfile->global_psymbols.next,
- objfile->static_psymbols.next);
- pst->psymtabs_addrmap_supported = 1;
+ pst = create_partial_symtab (per_cu, filename);
+
+ /* This must be done before calling dwarf2_build_include_psymtabs. */
attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, cu);
if (attr != NULL)
pst->dirname = DW_STRING (attr);
- pst->read_symtab_private = per_cu;
-
baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
- /* Store the function that reads in the rest of the symbol table. */
- pst->read_symtab = dwarf2_psymtab_to_symtab;
-
- per_cu->v.psymtab = pst;
-
dwarf2_find_base_address (comp_unit_die, cu);
/* Possibly set the default values of LOWPC and HIGHPC from
(objfile->static_psymbols.list + pst->statics_offset);
sort_pst_symbols (pst);
- if (per_cu->debug_types_section)
+ if (!VEC_empty (dwarf2_per_cu_ptr, cu->per_cu->s.imported_symtabs))
{
- /* It's not clear we want to do anything with stmt lists here.
- Waiting to see what gcc ultimately does. */
+ int i;
+ int len = VEC_length (dwarf2_per_cu_ptr, cu->per_cu->s.imported_symtabs);
+ struct dwarf2_per_cu_data *iter;
+
+ /* Fill in 'dependencies' here; we fill in 'users' in a
+ post-pass. */
+ pst->number_of_dependencies = len;
+ pst->dependencies = obstack_alloc (&objfile->objfile_obstack,
+ len * sizeof (struct symtab *));
+ for (i = 0;
+ VEC_iterate (dwarf2_per_cu_ptr, cu->per_cu->s.imported_symtabs,
+ i, iter);
+ ++i)
+ pst->dependencies[i] = iter->v.psymtab;
+
+ VEC_free (dwarf2_per_cu_ptr, cu->per_cu->s.imported_symtabs);
}
- else
+
+ /* Get the list of files included in the current compilation unit,
+ and build a psymtab for each of them. */
+ dwarf2_build_include_psymtabs (cu, comp_unit_die, pst);
+
+ if (dwarf2_read_debug)
{
- /* Get the list of files included in the current compilation unit,
- and build a psymtab for each of them. */
- dwarf2_build_include_psymtabs (cu, comp_unit_die, pst);
+ struct gdbarch *gdbarch = get_objfile_arch (objfile);
+
+ fprintf_unfiltered (gdb_stdlog,
+ "Psymtab for %s unit @0x%x: 0x%s - 0x%s"
+ ", %d global, %d static syms\n",
+ per_cu->is_debug_types ? "type" : "comp",
+ per_cu->offset.sect_off,
+ paddress (gdbarch, pst->textlow),
+ paddress (gdbarch, pst->texthigh),
+ pst->n_global_syms, pst->n_static_syms);
}
}
Process compilation unit THIS_CU for a psymtab. */
static void
-process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu)
+process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu,
+ int want_partial_unit)
{
/* If this compilation unit was already read in, free the
cached copy in order to read it in again. This is
if (this_cu->cu != NULL)
free_one_cached_comp_unit (this_cu);
- gdb_assert (! this_cu->debug_types_section);
- init_cu_and_read_dies (this_cu, 0, 0, process_psymtab_comp_unit_reader,
- NULL);
+ gdb_assert (! this_cu->is_debug_types);
+ init_cutu_and_read_dies (this_cu, NULL, 0, 0,
+ process_psymtab_comp_unit_reader,
+ &want_partial_unit);
/* Age out any secondary CUs. */
age_cached_comp_units ();
}
-/* Traversal function for htab_traverse_noresize.
- Process one .debug_types comp-unit. */
-
-static int
-process_psymtab_type_unit (void **slot, void *info)
+static hashval_t
+hash_type_unit_group (const void *item)
{
- struct signatured_type *sig_type = (struct signatured_type *) *slot;
- struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu;
-
- gdb_assert (info == NULL);
-
- /* If this compilation unit was already read in, free the
- cached copy in order to read it in again. This is
- necessary because we skipped some symbols when we first
- read in the compilation unit (see load_partial_dies).
- This problem could be avoided, but the benefit is unclear. */
- if (per_cu->cu != NULL)
- free_one_cached_comp_unit (per_cu);
-
- gdb_assert (per_cu->debug_types_section);
- init_tu_and_read_dies (per_cu, 0, process_psymtab_comp_unit_reader, NULL);
+ const struct type_unit_group *tu_group = item;
- /* Age out any secondary CUs. */
- age_cached_comp_units ();
-
- return 1;
+ return hash_stmt_list_entry (&tu_group->hash);
}
-/* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
- Build partial symbol tables for the .debug_types comp-units. */
-
-static void
-build_type_psymtabs (struct objfile *objfile)
+static int
+eq_type_unit_group (const void *item_lhs, const void *item_rhs)
{
- if (! create_all_type_units (objfile))
- return;
+ const struct type_unit_group *lhs = item_lhs;
+ const struct type_unit_group *rhs = item_rhs;
- htab_traverse_noresize (dwarf2_per_objfile->signatured_types,
- process_psymtab_type_unit, NULL);
+ return eq_stmt_list_entry (&lhs->hash, &rhs->hash);
}
-/* A cleanup function that clears objfile's psymtabs_addrmap field. */
+/* Allocate a hash table for type unit groups. */
-static void
-psymtabs_addrmap_cleanup (void *o)
+static htab_t
+allocate_type_unit_groups_table (void)
{
- struct objfile *objfile = o;
-
- objfile->psymtabs_addrmap = NULL;
+ return htab_create_alloc_ex (3,
+ hash_type_unit_group,
+ eq_type_unit_group,
+ NULL,
+ &dwarf2_per_objfile->objfile->objfile_obstack,
+ hashtab_obstack_allocate,
+ dummy_obstack_deallocate);
}
-/* Build the partial symbol table by doing a quick pass through the
- .debug_info and .debug_abbrev sections. */
-
-static void
-dwarf2_build_psymtabs_hard (struct objfile *objfile)
-{
- struct cleanup *back_to, *addrmap_cleanup;
- struct obstack temp_obstack;
- int i;
-
- dwarf2_per_objfile->reading_partial_symbols = 1;
+/* Type units that don't have DW_AT_stmt_list are grouped into their own
+ partial symtabs. We combine several TUs per psymtab to not let the size
+ of any one psymtab grow too big. */
+#define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
+#define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
- dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
+/* Helper routine for get_type_unit_group.
+ Create the type_unit_group object used to hold one or more TUs. */
- /* Any cached compilation units will be linked by the per-objfile
- read_in_chain. Make sure to free them when we're done. */
- back_to = make_cleanup (free_cached_comp_units, NULL);
+static struct type_unit_group *
+create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct)
+{
+ struct objfile *objfile = dwarf2_per_objfile->objfile;
+ struct dwarf2_per_cu_data *per_cu;
+ struct type_unit_group *tu_group;
- build_type_psymtabs (objfile);
+ tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack,
+ struct type_unit_group);
+ per_cu = &tu_group->per_cu;
+ per_cu->objfile = objfile;
+ per_cu->is_debug_types = 1;
+ per_cu->s.type_unit_group = tu_group;
- create_all_comp_units (objfile);
+ if (dwarf2_per_objfile->using_index)
+ {
+ per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack,
+ struct dwarf2_per_cu_quick_data);
+ tu_group->t.first_tu = cu->per_cu;
+ }
+ else
+ {
+ unsigned int line_offset = line_offset_struct.sect_off;
+ struct partial_symtab *pst;
+ char *name;
- /* Create a temporary address map on a temporary obstack. We later
- copy this to the final obstack. */
- obstack_init (&temp_obstack);
- make_cleanup_obstack_free (&temp_obstack);
- objfile->psymtabs_addrmap = addrmap_create_mutable (&temp_obstack);
- addrmap_cleanup = make_cleanup (psymtabs_addrmap_cleanup, objfile);
+ /* Give the symtab a useful name for debug purposes. */
+ if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0)
+ name = xstrprintf ("<type_units_%d>",
+ (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB));
+ else
+ name = xstrprintf ("<type_units_at_0x%x>", line_offset);
- for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
- {
- struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
+ pst = create_partial_symtab (per_cu, name);
+ pst->anonymous = 1;
- process_psymtab_comp_unit (per_cu);
+ xfree (name);
}
- objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap,
- &objfile->objfile_obstack);
- discard_cleanups (addrmap_cleanup);
+ tu_group->hash.dwo_unit = cu->dwo_unit;
+ tu_group->hash.line_offset = line_offset_struct;
- do_cleanups (back_to);
+ return tu_group;
}
-/* Load the partial DIEs for a secondary CU into memory. */
+/* Look up the type_unit_group for type unit CU, and create it if necessary.
+ STMT_LIST is a DW_AT_stmt_list attribute. */
-static void
-load_partial_comp_unit_reader (const struct die_reader_specs *reader,
- gdb_byte *info_ptr,
- struct die_info *comp_unit_die,
- int has_children,
- void *data)
+static struct type_unit_group *
+get_type_unit_group (struct dwarf2_cu *cu, struct attribute *stmt_list)
{
- struct dwarf2_cu *cu = reader->cu;
+ struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats;
+ struct type_unit_group *tu_group;
+ void **slot;
+ unsigned int line_offset;
+ struct type_unit_group type_unit_group_for_lookup;
- prepare_one_comp_unit (cu, comp_unit_die);
+ if (dwarf2_per_objfile->type_unit_groups == NULL)
+ {
+ dwarf2_per_objfile->type_unit_groups =
+ allocate_type_unit_groups_table ();
+ }
- /* Check if comp unit has_children.
+ /* Do we need to create a new group, or can we use an existing one? */
+
+ if (stmt_list)
+ {
+ line_offset = DW_UNSND (stmt_list);
+ ++tu_stats->nr_symtab_sharers;
+ }
+ else
+ {
+ /* Ugh, no stmt_list. Rare, but we have to handle it.
+ We can do various things here like create one group per TU or
+ spread them over multiple groups to split up the expansion work.
+ To avoid worst case scenarios (too many groups or too large groups)
+ we, umm, group them in bunches. */
+ line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
+ | (tu_stats->nr_stmt_less_type_units
+ / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE));
+ ++tu_stats->nr_stmt_less_type_units;
+ }
+
+ type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit;
+ type_unit_group_for_lookup.hash.line_offset.sect_off = line_offset;
+ slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups,
+ &type_unit_group_for_lookup, INSERT);
+ if (*slot != NULL)
+ {
+ tu_group = *slot;
+ gdb_assert (tu_group != NULL);
+ }
+ else
+ {
+ sect_offset line_offset_struct;
+
+ line_offset_struct.sect_off = line_offset;
+ tu_group = create_type_unit_group (cu, line_offset_struct);
+ *slot = tu_group;
+ ++tu_stats->nr_symtabs;
+ }
+
+ return tu_group;
+}
+
+/* Struct used to sort TUs by their abbreviation table offset. */
+
+struct tu_abbrev_offset
+{
+ struct signatured_type *sig_type;
+ sect_offset abbrev_offset;
+};
+
+/* Helper routine for build_type_unit_groups, passed to qsort. */
+
+static int
+sort_tu_by_abbrev_offset (const void *ap, const void *bp)
+{
+ const struct tu_abbrev_offset * const *a = ap;
+ const struct tu_abbrev_offset * const *b = bp;
+ unsigned int aoff = (*a)->abbrev_offset.sect_off;
+ unsigned int boff = (*b)->abbrev_offset.sect_off;
+
+ return (aoff > boff) - (aoff < boff);
+}
+
+/* A helper function to add a type_unit_group to a table. */
+
+static int
+add_type_unit_group_to_table (void **slot, void *datum)
+{
+ struct type_unit_group *tu_group = *slot;
+ struct type_unit_group ***datap = datum;
+
+ **datap = tu_group;
+ ++*datap;
+
+ return 1;
+}
+
+/* Efficiently read all the type units, calling init_cutu_and_read_dies on
+ each one passing FUNC,DATA.
+
+ The efficiency is because we sort TUs by the abbrev table they use and
+ only read each abbrev table once. In one program there are 200K TUs
+ sharing 8K abbrev tables.
+
+ The main purpose of this function is to support building the
+ dwarf2_per_objfile->type_unit_groups table.
+ TUs typically share the DW_AT_stmt_list of the CU they came from, so we
+ can collapse the search space by grouping them by stmt_list.
+ The savings can be significant, in the same program from above the 200K TUs
+ share 8K stmt_list tables.
+
+ FUNC is expected to call get_type_unit_group, which will create the
+ struct type_unit_group if necessary and add it to
+ dwarf2_per_objfile->type_unit_groups. */
+
+static void
+build_type_unit_groups (die_reader_func_ftype *func, void *data)
+{
+ struct objfile *objfile = dwarf2_per_objfile->objfile;
+ struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats;
+ struct cleanup *cleanups;
+ struct abbrev_table *abbrev_table;
+ sect_offset abbrev_offset;
+ struct tu_abbrev_offset *sorted_by_abbrev;
+ struct type_unit_group **iter;
+ int i;
+
+ /* It's up to the caller to not call us multiple times. */
+ gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL);
+
+ if (dwarf2_per_objfile->n_type_units == 0)
+ return;
+
+ /* TUs typically share abbrev tables, and there can be way more TUs than
+ abbrev tables. Sort by abbrev table to reduce the number of times we
+ read each abbrev table in.
+ Alternatives are to punt or to maintain a cache of abbrev tables.
+ This is simpler and efficient enough for now.
+
+ Later we group TUs by their DW_AT_stmt_list value (as this defines the
+ symtab to use). Typically TUs with the same abbrev offset have the same
+ stmt_list value too so in practice this should work well.
+
+ The basic algorithm here is:
+
+ sort TUs by abbrev table
+ for each TU with same abbrev table:
+ read abbrev table if first user
+ read TU top level DIE
+ [IWBN if DWO skeletons had DW_AT_stmt_list]
+ call FUNC */
+
+ if (dwarf2_read_debug)
+ fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n");
+
+ /* Sort in a separate table to maintain the order of all_type_units
+ for .gdb_index: TU indices directly index all_type_units. */
+ sorted_by_abbrev = XNEWVEC (struct tu_abbrev_offset,
+ dwarf2_per_objfile->n_type_units);
+ for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i)
+ {
+ struct signatured_type *sig_type = dwarf2_per_objfile->all_type_units[i];
+
+ sorted_by_abbrev[i].sig_type = sig_type;
+ sorted_by_abbrev[i].abbrev_offset =
+ read_abbrev_offset (sig_type->per_cu.info_or_types_section,
+ sig_type->per_cu.offset);
+ }
+ cleanups = make_cleanup (xfree, sorted_by_abbrev);
+ qsort (sorted_by_abbrev, dwarf2_per_objfile->n_type_units,
+ sizeof (struct tu_abbrev_offset), sort_tu_by_abbrev_offset);
+
+ /* Note: In the .gdb_index case, get_type_unit_group may have already been
+ called any number of times, so we don't reset tu_stats here. */
+
+ abbrev_offset.sect_off = ~(unsigned) 0;
+ abbrev_table = NULL;
+ make_cleanup (abbrev_table_free_cleanup, &abbrev_table);
+
+ for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i)
+ {
+ const struct tu_abbrev_offset *tu = &sorted_by_abbrev[i];
+
+ /* Switch to the next abbrev table if necessary. */
+ if (abbrev_table == NULL
+ || tu->abbrev_offset.sect_off != abbrev_offset.sect_off)
+ {
+ if (abbrev_table != NULL)
+ {
+ abbrev_table_free (abbrev_table);
+ /* Reset to NULL in case abbrev_table_read_table throws
+ an error: abbrev_table_free_cleanup will get called. */
+ abbrev_table = NULL;
+ }
+ abbrev_offset = tu->abbrev_offset;
+ abbrev_table =
+ abbrev_table_read_table (&dwarf2_per_objfile->abbrev,
+ abbrev_offset);
+ ++tu_stats->nr_uniq_abbrev_tables;
+ }
+
+ init_cutu_and_read_dies (&tu->sig_type->per_cu, abbrev_table, 0, 0,
+ func, data);
+ }
+
+ /* Create a vector of pointers to primary type units to make it easy to
+ iterate over them and CUs. See dw2_get_primary_cu. */
+ dwarf2_per_objfile->n_type_unit_groups =
+ htab_elements (dwarf2_per_objfile->type_unit_groups);
+ dwarf2_per_objfile->all_type_unit_groups =
+ obstack_alloc (&objfile->objfile_obstack,
+ dwarf2_per_objfile->n_type_unit_groups
+ * sizeof (struct type_unit_group *));
+ iter = &dwarf2_per_objfile->all_type_unit_groups[0];
+ htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups,
+ add_type_unit_group_to_table, &iter);
+ gdb_assert (iter - &dwarf2_per_objfile->all_type_unit_groups[0]
+ == dwarf2_per_objfile->n_type_unit_groups);
+
+ do_cleanups (cleanups);
+
+ if (dwarf2_read_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog, "Done building type unit groups:\n");
+ fprintf_unfiltered (gdb_stdlog, " %d TUs\n",
+ dwarf2_per_objfile->n_type_units);
+ fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n",
+ tu_stats->nr_uniq_abbrev_tables);
+ fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n",
+ tu_stats->nr_symtabs);
+ fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n",
+ tu_stats->nr_symtab_sharers);
+ fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n",
+ tu_stats->nr_stmt_less_type_units);
+ }
+}
+
+/* Reader function for build_type_psymtabs. */
+
+static void
+build_type_psymtabs_reader (const struct die_reader_specs *reader,
+ gdb_byte *info_ptr,
+ struct die_info *type_unit_die,
+ int has_children,
+ void *data)
+{
+ struct objfile *objfile = dwarf2_per_objfile->objfile;
+ struct dwarf2_cu *cu = reader->cu;
+ struct dwarf2_per_cu_data *per_cu = cu->per_cu;
+ struct type_unit_group *tu_group;
+ struct attribute *attr;
+ struct partial_die_info *first_die;
+ CORE_ADDR lowpc, highpc;
+ struct partial_symtab *pst;
+
+ gdb_assert (data == NULL);
+
+ if (! has_children)
+ return;
+
+ attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list);
+ tu_group = get_type_unit_group (cu, attr);
+
+ VEC_safe_push (dwarf2_per_cu_ptr, tu_group->t.tus, per_cu);
+
+ prepare_one_comp_unit (cu, type_unit_die, language_minimal);
+ cu->list_in_scope = &file_symbols;
+ pst = create_partial_symtab (per_cu, "");
+ pst->anonymous = 1;
+
+ first_die = load_partial_dies (reader, info_ptr, 1);
+
+ lowpc = (CORE_ADDR) -1;
+ highpc = (CORE_ADDR) 0;
+ scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu);
+
+ pst->n_global_syms = objfile->global_psymbols.next -
+ (objfile->global_psymbols.list + pst->globals_offset);
+ pst->n_static_syms = objfile->static_psymbols.next -
+ (objfile->static_psymbols.list + pst->statics_offset);
+ sort_pst_symbols (pst);
+}
+
+/* Traversal function for build_type_psymtabs. */
+
+static int
+build_type_psymtab_dependencies (void **slot, void *info)
+{
+ struct objfile *objfile = dwarf2_per_objfile->objfile;
+ struct type_unit_group *tu_group = (struct type_unit_group *) *slot;
+ struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu;
+ struct partial_symtab *pst = per_cu->v.psymtab;
+ int len = VEC_length (dwarf2_per_cu_ptr, tu_group->t.tus);
+ struct dwarf2_per_cu_data *iter;
+ int i;
+
+ gdb_assert (len > 0);
+
+ pst->number_of_dependencies = len;
+ pst->dependencies = obstack_alloc (&objfile->objfile_obstack,
+ len * sizeof (struct psymtab *));
+ for (i = 0;
+ VEC_iterate (dwarf2_per_cu_ptr, tu_group->t.tus, i, iter);
+ ++i)
+ {
+ pst->dependencies[i] = iter->v.psymtab;
+ iter->s.type_unit_group = tu_group;
+ }
+
+ VEC_free (dwarf2_per_cu_ptr, tu_group->t.tus);
+
+ return 1;
+}
+
+/* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
+ Build partial symbol tables for the .debug_types comp-units. */
+
+static void
+build_type_psymtabs (struct objfile *objfile)
+{
+ if (! create_all_type_units (objfile))
+ return;
+
+ build_type_unit_groups (build_type_psymtabs_reader, NULL);
+
+ /* Now that all TUs have been processed we can fill in the dependencies. */
+ htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups,
+ build_type_psymtab_dependencies, NULL);
+}
+
+/* A cleanup function that clears objfile's psymtabs_addrmap field. */
+
+static void
+psymtabs_addrmap_cleanup (void *o)
+{
+ struct objfile *objfile = o;
+
+ objfile->psymtabs_addrmap = NULL;
+}
+
+/* Compute the 'user' field for each psymtab in OBJFILE. */
+
+static void
+set_partial_user (struct objfile *objfile)
+{
+ int i;
+
+ for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
+ {
+ struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
+ struct partial_symtab *pst = per_cu->v.psymtab;
+ int j;
+
+ if (pst == NULL)
+ continue;
+
+ for (j = 0; j < pst->number_of_dependencies; ++j)
+ {
+ /* Set the 'user' field only if it is not already set. */
+ if (pst->dependencies[j]->user == NULL)
+ pst->dependencies[j]->user = pst;
+ }
+ }
+}
+
+/* Build the partial symbol table by doing a quick pass through the
+ .debug_info and .debug_abbrev sections. */
+
+static void
+dwarf2_build_psymtabs_hard (struct objfile *objfile)
+{
+ struct cleanup *back_to, *addrmap_cleanup;
+ struct obstack temp_obstack;
+ int i;
+
+ if (dwarf2_read_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n",
+ objfile->name);
+ }
+
+ dwarf2_per_objfile->reading_partial_symbols = 1;
+
+ dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
+
+ /* Any cached compilation units will be linked by the per-objfile
+ read_in_chain. Make sure to free them when we're done. */
+ back_to = make_cleanup (free_cached_comp_units, NULL);
+
+ build_type_psymtabs (objfile);
+
+ create_all_comp_units (objfile);
+
+ /* Create a temporary address map on a temporary obstack. We later
+ copy this to the final obstack. */
+ obstack_init (&temp_obstack);
+ make_cleanup_obstack_free (&temp_obstack);
+ objfile->psymtabs_addrmap = addrmap_create_mutable (&temp_obstack);
+ addrmap_cleanup = make_cleanup (psymtabs_addrmap_cleanup, objfile);
+
+ for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
+ {
+ struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
+
+ process_psymtab_comp_unit (per_cu, 0);
+ }
+
+ set_partial_user (objfile);
+
+ objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap,
+ &objfile->objfile_obstack);
+ discard_cleanups (addrmap_cleanup);
+
+ do_cleanups (back_to);
+
+ if (dwarf2_read_debug)
+ fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n",
+ objfile->name);
+}
+
+/* die_reader_func for load_partial_comp_unit. */
+
+static void
+load_partial_comp_unit_reader (const struct die_reader_specs *reader,
+ gdb_byte *info_ptr,
+ struct die_info *comp_unit_die,
+ int has_children,
+ void *data)
+{
+ struct dwarf2_cu *cu = reader->cu;
+
+ prepare_one_comp_unit (cu, comp_unit_die, language_minimal);
+
+ /* Check if comp unit has_children.
If so, read the rest of the partial symbols from this comp unit.
If not, there's no more debug_info for this comp unit. */
if (has_children)
static void
load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu)
{
- if (this_cu->debug_types_section)
- init_tu_and_read_dies (this_cu, 1, load_partial_comp_unit_reader, NULL);
- else
- init_cu_and_read_dies (this_cu, 0, 1, load_partial_comp_unit_reader, NULL);
+ init_cutu_and_read_dies (this_cu, NULL, 1, 1,
+ load_partial_comp_unit_reader, NULL);
}
-/* Create a list of all compilation units in OBJFILE.
- This is only done for -readnow and building partial symtabs. */
-
static void
-create_all_comp_units (struct objfile *objfile)
+read_comp_units_from_section (struct objfile *objfile,
+ struct dwarf2_section_info *section,
+ unsigned int is_dwz,
+ int *n_allocated,
+ int *n_comp_units,
+ struct dwarf2_per_cu_data ***all_comp_units)
{
- int n_allocated;
- int n_comp_units;
- struct dwarf2_per_cu_data **all_comp_units;
gdb_byte *info_ptr;
+ bfd *abfd = section->asection->owner;
- dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
- info_ptr = dwarf2_per_objfile->info.buffer;
+ dwarf2_read_section (objfile, section);
- n_comp_units = 0;
- n_allocated = 10;
- all_comp_units = xmalloc (n_allocated
- * sizeof (struct dwarf2_per_cu_data *));
+ info_ptr = section->buffer;
- while (info_ptr < dwarf2_per_objfile->info.buffer
- + dwarf2_per_objfile->info.size)
+ while (info_ptr < section->buffer + section->size)
{
unsigned int length, initial_length_size;
struct dwarf2_per_cu_data *this_cu;
sect_offset offset;
- offset.sect_off = info_ptr - dwarf2_per_objfile->info.buffer;
+ offset.sect_off = info_ptr - section->buffer;
/* Read just enough information to find out where the next
compilation unit is. */
- length = read_initial_length (objfile->obfd, info_ptr,
- &initial_length_size);
+ length = read_initial_length (abfd, info_ptr, &initial_length_size);
/* Save the compilation unit for later lookup. */
this_cu = obstack_alloc (&objfile->objfile_obstack,
memset (this_cu, 0, sizeof (*this_cu));
this_cu->offset = offset;
this_cu->length = length + initial_length_size;
+ this_cu->is_dwz = is_dwz;
this_cu->objfile = objfile;
+ this_cu->info_or_types_section = section;
- if (n_comp_units == n_allocated)
+ if (*n_comp_units == *n_allocated)
{
- n_allocated *= 2;
- all_comp_units = xrealloc (all_comp_units,
- n_allocated
- * sizeof (struct dwarf2_per_cu_data *));
+ *n_allocated *= 2;
+ *all_comp_units = xrealloc (*all_comp_units,
+ *n_allocated
+ * sizeof (struct dwarf2_per_cu_data *));
}
- all_comp_units[n_comp_units++] = this_cu;
+ (*all_comp_units)[*n_comp_units] = this_cu;
+ ++*n_comp_units;
info_ptr = info_ptr + this_cu->length;
}
+}
+
+/* Create a list of all compilation units in OBJFILE.
+ This is only done for -readnow and building partial symtabs. */
+
+static void
+create_all_comp_units (struct objfile *objfile)
+{
+ int n_allocated;
+ int n_comp_units;
+ struct dwarf2_per_cu_data **all_comp_units;
+
+ n_comp_units = 0;
+ n_allocated = 10;
+ all_comp_units = xmalloc (n_allocated
+ * sizeof (struct dwarf2_per_cu_data *));
+
+ read_comp_units_from_section (objfile, &dwarf2_per_objfile->info, 0,
+ &n_allocated, &n_comp_units, &all_comp_units);
+
+ if (bfd_get_section_by_name (objfile->obfd, ".gnu_debugaltlink") != NULL)
+ {
+ struct dwz_file *dwz = dwarf2_get_dwz_file ();
+
+ read_comp_units_from_section (objfile, &dwz->info, 1,
+ &n_allocated, &n_comp_units,
+ &all_comp_units);
+ }
dwarf2_per_objfile->all_comp_units
= obstack_alloc (&objfile->objfile_obstack,
enums. */
if (pdi->name != NULL || pdi->tag == DW_TAG_namespace
- || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type)
+ || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type
+ || pdi->tag == DW_TAG_imported_unit)
{
switch (pdi->tag)
{
case DW_TAG_module:
add_partial_module (pdi, lowpc, highpc, need_pc, cu);
break;
+ case DW_TAG_imported_unit:
+ {
+ struct dwarf2_per_cu_data *per_cu;
+
+ /* For now we don't handle imported units in type units. */
+ if (cu->per_cu->is_debug_types)
+ {
+ error (_("Dwarf Error: DW_TAG_imported_unit is not"
+ " supported in type units [in module %s]"),
+ cu->objfile->name);
+ }
+
+ per_cu = dwarf2_find_containing_comp_unit (pdi->d.offset,
+ pdi->is_dwz,
+ cu->objfile);
+
+ /* Go read the partial unit, if needed. */
+ if (per_cu->v.psymtab == NULL)
+ process_psymtab_comp_unit (per_cu, 1);
+
+ VEC_safe_push (dwarf2_per_cu_ptr,
+ cu->per_cu->s.imported_symtabs, per_cu);
+ }
+ break;
default:
break;
}
real_pdi = pdi;
while (real_pdi->has_specification)
- real_pdi = find_partial_die (real_pdi->spec_offset, cu);
+ real_pdi = find_partial_die (real_pdi->spec_offset,
+ real_pdi->spec_is_dwz, cu);
parent = real_pdi->die_parent;
if (parent == NULL)
}
break;
case DW_TAG_variable:
- if (pdi->locdesc)
- addr = decode_locdesc (pdi->locdesc, cu);
+ if (pdi->d.locdesc)
+ addr = decode_locdesc (pdi->d.locdesc, cu);
- if (pdi->locdesc
+ if (pdi->d.locdesc
&& addr == 0
&& !dwarf2_per_objfile->has_section_at_zero)
{
used by GDB, but it comes in handy for debugging partial symbol
table building. */
- if (pdi->locdesc || pdi->has_type)
+ if (pdi->d.locdesc || pdi->has_type)
add_psymbol_to_list (actual_name, strlen (actual_name),
built_actual_name,
VAR_DOMAIN, LOC_STATIC,
else
{
/* Static Variable. Skip symbols without location descriptors. */
- if (pdi->locdesc == NULL)
+ if (pdi->d.locdesc == NULL)
{
if (built_actual_name)
xfree (actual_name);
if (abbrev_number == 0)
return NULL;
- abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
+ abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number);
if (!abbrev)
{
error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"),
bfd *abfd = reader->abfd;
struct dwarf2_cu *cu = reader->cu;
gdb_byte *buffer = reader->buffer;
+ const gdb_byte *buffer_end = reader->buffer_end;
+ gdb_byte *start_info_ptr = info_ptr;
unsigned int form, i;
for (i = 0; i < abbrev->num_attrs; i++)
else
info_ptr += cu->header.offset_size;
break;
+ case DW_FORM_GNU_ref_alt:
+ info_ptr += cu->header.offset_size;
+ break;
case DW_FORM_addr:
info_ptr += cu->header.addr_size;
break;
break;
case DW_FORM_sec_offset:
case DW_FORM_strp:
+ case DW_FORM_GNU_strp_alt:
info_ptr += cu->header.offset_size;
break;
case DW_FORM_exprloc:
case DW_FORM_sdata:
case DW_FORM_udata:
case DW_FORM_ref_udata:
- info_ptr = skip_leb128 (abfd, info_ptr);
+ case DW_FORM_GNU_addr_index:
+ case DW_FORM_GNU_str_index:
+ info_ptr = (gdb_byte *) safe_skip_leb128 (info_ptr, buffer_end);
break;
case DW_FORM_indirect:
form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
printf_filtered (_("done.\n"));
}
}
+
+ process_cu_includes ();
}
\f
/* Reading in full CUs. */
/* Add PER_CU to the queue. */
static void
-queue_comp_unit (struct dwarf2_per_cu_data *per_cu)
+queue_comp_unit (struct dwarf2_per_cu_data *per_cu,
+ enum language pretend_language)
{
struct dwarf2_queue_item *item;
per_cu->queued = 1;
item = xmalloc (sizeof (*item));
item->per_cu = per_cu;
+ item->pretend_language = pretend_language;
item->next = NULL;
if (dwarf2_queue == NULL)
dwarf2_queue_tail = item;
}
+/* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
+ unit and add it to our queue.
+ The result is non-zero if PER_CU was queued, otherwise the result is zero
+ meaning either PER_CU is already queued or it is already loaded. */
+
+static int
+maybe_queue_comp_unit (struct dwarf2_cu *this_cu,
+ struct dwarf2_per_cu_data *per_cu,
+ enum language pretend_language)
+{
+ /* We may arrive here during partial symbol reading, if we need full
+ DIEs to process an unusual case (e.g. template arguments). Do
+ not queue PER_CU, just tell our caller to load its DIEs. */
+ if (dwarf2_per_objfile->reading_partial_symbols)
+ {
+ if (per_cu->cu == NULL || per_cu->cu->dies == NULL)
+ return 1;
+ return 0;
+ }
+
+ /* Mark the dependence relation so that we don't flush PER_CU
+ too early. */
+ dwarf2_add_dependence (this_cu, per_cu);
+
+ /* If it's already on the queue, we have nothing to do. */
+ if (per_cu->queued)
+ return 0;
+
+ /* If the compilation unit is already loaded, just mark it as
+ used. */
+ if (per_cu->cu != NULL)
+ {
+ per_cu->cu->last_used = 0;
+ return 0;
+ }
+
+ /* Add it to the queue. */
+ queue_comp_unit (per_cu, pretend_language);
+
+ return 1;
+}
+
/* Process the queue. */
static void
{
struct dwarf2_queue_item *item, *next_item;
+ if (dwarf2_read_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog,
+ "Expanding one or more symtabs of objfile %s ...\n",
+ dwarf2_per_objfile->objfile->name);
+ }
+
/* The queue starts out with one item, but following a DIE reference
may load a new CU, adding it to the end of the queue. */
for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item)
if (dwarf2_per_objfile->using_index
? !item->per_cu->v.quick->symtab
: (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin))
- process_full_comp_unit (item->per_cu);
+ {
+ struct dwarf2_per_cu_data *per_cu = item->per_cu;
+
+ if (dwarf2_read_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog,
+ "Expanding symtab of %s at offset 0x%x\n",
+ per_cu->is_debug_types ? "TU" : "CU",
+ per_cu->offset.sect_off);
+ }
+
+ if (per_cu->is_debug_types)
+ process_full_type_unit (per_cu, item->pretend_language);
+ else
+ process_full_comp_unit (per_cu, item->pretend_language);
+
+ if (dwarf2_read_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog,
+ "Done expanding %s at offset 0x%x\n",
+ per_cu->is_debug_types ? "TU" : "CU",
+ per_cu->offset.sect_off);
+ }
+ }
item->per_cu->queued = 0;
next_item = item->next;
}
dwarf2_queue_tail = NULL;
+
+ if (dwarf2_read_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n",
+ dwarf2_per_objfile->objfile->name);
+ }
}
/* Free all allocated queue entries. This function only releases anything if
psymtab_to_symtab_1 (struct partial_symtab *pst)
{
struct dwarf2_per_cu_data *per_cu;
- struct cleanup *back_to;
int i;
+ if (pst->readin)
+ return;
+
for (i = 0; i < pst->number_of_dependencies; i++)
- if (!pst->dependencies[i]->readin)
+ if (!pst->dependencies[i]->readin
+ && pst->dependencies[i]->user == NULL)
{
/* Inform about additional files that need to be read in. */
if (info_verbose)
void *data)
{
struct dwarf2_cu *cu = reader->cu;
- struct attribute *attr;
+ enum language *language_ptr = data;
gdb_assert (cu->die_hash == NULL);
cu->die_hash =
or we won't be able to build types correctly.
Similarly, if we do not read the producer, we can not apply
producer-specific interpretation. */
- prepare_one_comp_unit (cu, cu->dies);
+ prepare_one_comp_unit (cu, cu->dies, *language_ptr);
}
/* Load the DIEs associated with PER_CU into memory. */
static void
-load_full_comp_unit (struct dwarf2_per_cu_data *this_cu)
+load_full_comp_unit (struct dwarf2_per_cu_data *this_cu,
+ enum language pretend_language)
{
- gdb_assert (! this_cu->debug_types_section);
+ gdb_assert (! this_cu->is_debug_types);
- init_cu_and_read_dies (this_cu, 1, 1, load_full_comp_unit_reader, NULL);
+ init_cutu_and_read_dies (this_cu, NULL, 1, 1,
+ load_full_comp_unit_reader, &pretend_language);
}
/* Add a DIE to the delayed physname list. */
}
}
+static void compute_symtab_includes (struct dwarf2_per_cu_data *per_cu);
+
+/* Return the symtab for PER_CU. This works properly regardless of
+ whether we're using the index or psymtabs. */
+
+static struct symtab *
+get_symtab (struct dwarf2_per_cu_data *per_cu)
+{
+ return (dwarf2_per_objfile->using_index
+ ? per_cu->v.quick->symtab
+ : per_cu->v.psymtab->symtab);
+}
+
+/* A helper function for computing the list of all symbol tables
+ included by PER_CU. */
+
+static void
+recursively_compute_inclusions (VEC (dwarf2_per_cu_ptr) **result,
+ htab_t all_children,
+ struct dwarf2_per_cu_data *per_cu)
+{
+ void **slot;
+ int ix;
+ struct dwarf2_per_cu_data *iter;
+
+ slot = htab_find_slot (all_children, per_cu, INSERT);
+ if (*slot != NULL)
+ {
+ /* This inclusion and its children have been processed. */
+ return;
+ }
+
+ *slot = per_cu;
+ /* Only add a CU if it has a symbol table. */
+ if (get_symtab (per_cu) != NULL)
+ VEC_safe_push (dwarf2_per_cu_ptr, *result, per_cu);
+
+ for (ix = 0;
+ VEC_iterate (dwarf2_per_cu_ptr, per_cu->s.imported_symtabs, ix, iter);
+ ++ix)
+ recursively_compute_inclusions (result, all_children, iter);
+}
+
+/* Compute the symtab 'includes' fields for the symtab related to
+ PER_CU. */
+
+static void
+compute_symtab_includes (struct dwarf2_per_cu_data *per_cu)
+{
+ gdb_assert (! per_cu->is_debug_types);
+
+ if (!VEC_empty (dwarf2_per_cu_ptr, per_cu->s.imported_symtabs))
+ {
+ int ix, len;
+ struct dwarf2_per_cu_data *iter;
+ VEC (dwarf2_per_cu_ptr) *result_children = NULL;
+ htab_t all_children;
+ struct symtab *symtab = get_symtab (per_cu);
+
+ /* If we don't have a symtab, we can just skip this case. */
+ if (symtab == NULL)
+ return;
+
+ all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer,
+ NULL, xcalloc, xfree);
+
+ for (ix = 0;
+ VEC_iterate (dwarf2_per_cu_ptr, per_cu->s.imported_symtabs,
+ ix, iter);
+ ++ix)
+ recursively_compute_inclusions (&result_children, all_children, iter);
+
+ /* Now we have a transitive closure of all the included CUs, so
+ we can convert it to a list of symtabs. */
+ len = VEC_length (dwarf2_per_cu_ptr, result_children);
+ symtab->includes
+ = obstack_alloc (&dwarf2_per_objfile->objfile->objfile_obstack,
+ (len + 1) * sizeof (struct symtab *));
+ for (ix = 0;
+ VEC_iterate (dwarf2_per_cu_ptr, result_children, ix, iter);
+ ++ix)
+ symtab->includes[ix] = get_symtab (iter);
+ symtab->includes[len] = NULL;
+
+ VEC_free (dwarf2_per_cu_ptr, result_children);
+ htab_delete (all_children);
+ }
+}
+
+/* Compute the 'includes' field for the symtabs of all the CUs we just
+ read. */
+
+static void
+process_cu_includes (void)
+{
+ int ix;
+ struct dwarf2_per_cu_data *iter;
+
+ for (ix = 0;
+ VEC_iterate (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus,
+ ix, iter);
+ ++ix)
+ {
+ if (! iter->is_debug_types)
+ compute_symtab_includes (iter);
+ }
+
+ VEC_free (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus);
+}
+
/* Generate full symbol information for PER_CU, whose DIEs have
already been loaded into memory. */
static void
-process_full_comp_unit (struct dwarf2_per_cu_data *per_cu)
+process_full_comp_unit (struct dwarf2_per_cu_data *per_cu,
+ enum language pretend_language)
{
struct dwarf2_cu *cu = per_cu->cu;
struct objfile *objfile = per_cu->objfile;
struct symtab *symtab;
struct cleanup *back_to, *delayed_list_cleanup;
CORE_ADDR baseaddr;
+ struct block *static_block;
baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
cu->list_in_scope = &file_symbols;
+ cu->language = pretend_language;
+ cu->language_defn = language_def (cu->language);
+
/* Do line number decoding in read_file_scope () */
process_die (cu->dies, cu);
it, by scanning the DIE's below the compilation unit. */
get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu);
- symtab = end_symtab (highpc + baseaddr, objfile, SECT_OFF_TEXT (objfile));
+ static_block
+ = end_symtab_get_static_block (highpc + baseaddr, objfile, 0,
+ per_cu->s.imported_symtabs != NULL);
+
+ /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
+ Also, DW_AT_ranges may record ranges not belonging to any child DIEs
+ (such as virtual method tables). Record the ranges in STATIC_BLOCK's
+ addrmap to help ensure it has an accurate map of pc values belonging to
+ this comp unit. */
+ dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu);
+
+ symtab = end_symtab_from_static_block (static_block, objfile,
+ SECT_OFF_TEXT (objfile), 0);
if (symtab != NULL)
{
pst->readin = 1;
}
+ /* Push it for inclusion processing later. */
+ VEC_safe_push (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, per_cu);
+
+ do_cleanups (back_to);
+}
+
+/* Generate full symbol information for type unit PER_CU, whose DIEs have
+ already been loaded into memory. */
+
+static void
+process_full_type_unit (struct dwarf2_per_cu_data *per_cu,
+ enum language pretend_language)
+{
+ struct dwarf2_cu *cu = per_cu->cu;
+ struct objfile *objfile = per_cu->objfile;
+ struct symtab *symtab;
+ struct cleanup *back_to, *delayed_list_cleanup;
+
+ buildsym_init ();
+ back_to = make_cleanup (really_free_pendings, NULL);
+ delayed_list_cleanup = make_cleanup (free_delayed_list, cu);
+
+ cu->list_in_scope = &file_symbols;
+
+ cu->language = pretend_language;
+ cu->language_defn = language_def (cu->language);
+
+ /* The symbol tables are set up in read_type_unit_scope. */
+ process_die (cu->dies, cu);
+
+ /* For now fudge the Go package. */
+ if (cu->language == language_go)
+ fixup_go_packaging (cu);
+
+ /* Now that we have processed all the DIEs in the CU, all the types
+ should be complete, and it should now be safe to compute all of the
+ physnames. */
+ compute_delayed_physnames (cu);
+ do_cleanups (delayed_list_cleanup);
+
+ /* TUs share symbol tables.
+ If this is the first TU to use this symtab, complete the construction
+ of it with end_expandable_symtab. Otherwise, complete the addition of
+ this TU's symbols to the existing symtab. */
+ if (per_cu->s.type_unit_group->primary_symtab == NULL)
+ {
+ symtab = end_expandable_symtab (0, objfile, SECT_OFF_TEXT (objfile));
+ per_cu->s.type_unit_group->primary_symtab = symtab;
+
+ if (symtab != NULL)
+ {
+ /* Set symtab language to language from DW_AT_language. If the
+ compilation is from a C file generated by language preprocessors,
+ do not set the language if it was already deduced by
+ start_subfile. */
+ if (!(cu->language == language_c && symtab->language != language_c))
+ symtab->language = cu->language;
+ }
+ }
+ else
+ {
+ augment_type_symtab (objfile,
+ per_cu->s.type_unit_group->primary_symtab);
+ symtab = per_cu->s.type_unit_group->primary_symtab;
+ }
+
+ if (dwarf2_per_objfile->using_index)
+ per_cu->v.quick->symtab = symtab;
+ else
+ {
+ struct partial_symtab *pst = per_cu->v.psymtab;
+ pst->symtab = symtab;
+ pst->readin = 1;
+ }
+
do_cleanups (back_to);
}
+/* Process an imported unit DIE. */
+
+static void
+process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct attribute *attr;
+
+ /* For now we don't handle imported units in type units. */
+ if (cu->per_cu->is_debug_types)
+ {
+ error (_("Dwarf Error: DW_TAG_imported_unit is not"
+ " supported in type units [in module %s]"),
+ cu->objfile->name);
+ }
+
+ attr = dwarf2_attr (die, DW_AT_import, cu);
+ if (attr != NULL)
+ {
+ struct dwarf2_per_cu_data *per_cu;
+ struct symtab *imported_symtab;
+ sect_offset offset;
+ int is_dwz;
+
+ offset = dwarf2_get_ref_die_offset (attr);
+ is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz);
+ per_cu = dwarf2_find_containing_comp_unit (offset, is_dwz, cu->objfile);
+
+ /* Queue the unit, if needed. */
+ if (maybe_queue_comp_unit (cu, per_cu, cu->language))
+ load_full_comp_unit (per_cu, cu->language);
+
+ VEC_safe_push (dwarf2_per_cu_ptr, cu->per_cu->s.imported_symtabs,
+ per_cu);
+ }
+}
+
/* Process a die and its children. */
static void
case DW_TAG_padding:
break;
case DW_TAG_compile_unit:
+ case DW_TAG_partial_unit:
read_file_scope (die, cu);
break;
case DW_TAG_type_unit:
dwarf_tag_name (die->tag));
read_import_statement (die, cu);
break;
+
+ case DW_TAG_imported_unit:
+ process_imported_unit_die (die, cu);
+ break;
+
default:
new_symbol (die, NULL, cu);
break;
do_cleanups (cleanups);
}
-/* Cleanup function for read_file_scope. */
+/* Cleanup function for handle_DW_AT_stmt_list. */
static void
free_cu_line_header (void *arg)
*name = "<unknown>";
}
-/* Handle DW_AT_stmt_list for a compilation unit or type unit.
- DIE is the DW_TAG_compile_unit or DW_TAG_type_unit die for CU.
+/* Handle DW_AT_stmt_list for a compilation unit.
+ DIE is the DW_TAG_compile_unit die for CU.
COMP_DIR is the compilation directory.
WANT_LINE_INFO is non-zero if the pc/line-number mapping is needed. */
static void
handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu,
- const char *comp_dir, int want_line_info)
+ const char *comp_dir)
{
struct attribute *attr;
- struct objfile *objfile = cu->objfile;
+
+ gdb_assert (! cu->per_cu->is_debug_types);
+
+ attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
+ if (attr)
+ {
+ unsigned int line_offset = DW_UNSND (attr);
+ struct line_header *line_header
+ = dwarf_decode_line_header (line_offset, cu);
+
+ if (line_header)
+ {
+ cu->line_header = line_header;
+ make_cleanup (free_cu_line_header, cu);
+ dwarf_decode_lines (line_header, comp_dir, cu, NULL, 1);
+ }
+ }
+}
+
+/* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
+
+static void
+read_file_scope (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct objfile *objfile = dwarf2_per_objfile->objfile;
+ struct cleanup *back_to = make_cleanup (null_cleanup, 0);
+ CORE_ADDR lowpc = ((CORE_ADDR) -1);
+ CORE_ADDR highpc = ((CORE_ADDR) 0);
+ struct attribute *attr;
+ char *name = NULL;
+ char *comp_dir = NULL;
+ struct die_info *child_die;
bfd *abfd = objfile->obfd;
+ CORE_ADDR baseaddr;
+
+ baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
+
+ get_scope_pc_bounds (die, &lowpc, &highpc, cu);
+
+ /* If we didn't find a lowpc, set it to highpc to avoid complaints
+ from finish_block. */
+ if (lowpc == ((CORE_ADDR) -1))
+ lowpc = highpc;
+ lowpc += baseaddr;
+ highpc += baseaddr;
+
+ find_file_and_directory (die, cu, &name, &comp_dir);
+
+ prepare_one_comp_unit (cu, die, cu->language);
+
+ /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
+ standardised yet. As a workaround for the language detection we fall
+ back to the DW_AT_producer string. */
+ if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL)
+ cu->language = language_opencl;
+
+ /* Similar hack for Go. */
+ if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL)
+ set_cu_language (DW_LANG_Go, cu);
+
+ dwarf2_start_symtab (cu, name, comp_dir, lowpc);
+
+ /* Decode line number information if present. We do this before
+ processing child DIEs, so that the line header table is available
+ for DW_AT_decl_file. */
+ handle_DW_AT_stmt_list (die, cu, comp_dir);
+
+ /* Process all dies in compilation unit. */
+ if (die->child != NULL)
+ {
+ child_die = die->child;
+ while (child_die && child_die->tag)
+ {
+ process_die (child_die, cu);
+ child_die = sibling_die (child_die);
+ }
+ }
+
+ /* Decode macro information, if present. Dwarf 2 macro information
+ refers to information in the line number info statement program
+ header, so we can only read it if we've read the header
+ successfully. */
+ attr = dwarf2_attr (die, DW_AT_GNU_macros, cu);
+ if (attr && cu->line_header)
+ {
+ if (dwarf2_attr (die, DW_AT_macro_info, cu))
+ complaint (&symfile_complaints,
+ _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
+
+ dwarf_decode_macros (cu, DW_UNSND (attr), comp_dir, 1);
+ }
+ else
+ {
+ attr = dwarf2_attr (die, DW_AT_macro_info, cu);
+ if (attr && cu->line_header)
+ {
+ unsigned int macro_offset = DW_UNSND (attr);
+
+ dwarf_decode_macros (cu, macro_offset, comp_dir, 0);
+ }
+ }
+
+ do_cleanups (back_to);
+}
+
+/* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
+ Create the set of symtabs used by this TU, or if this TU is sharing
+ symtabs with another TU and the symtabs have already been created
+ then restore those symtabs in the line header.
+ We don't need the pc/line-number mapping for type units. */
+
+static void
+setup_type_unit_groups (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct objfile *objfile = dwarf2_per_objfile->objfile;
+ struct dwarf2_per_cu_data *per_cu = cu->per_cu;
+ struct type_unit_group *tu_group;
+ int first_time;
+ struct line_header *lh;
+ struct attribute *attr;
+ unsigned int i, line_offset;
+
+ gdb_assert (per_cu->is_debug_types);
+
+ attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
+
+ /* If we're using .gdb_index (includes -readnow) then
+ per_cu->s.type_unit_group may not have been set up yet. */
+ if (per_cu->s.type_unit_group == NULL)
+ per_cu->s.type_unit_group = get_type_unit_group (cu, attr);
+ tu_group = per_cu->s.type_unit_group;
+
+ /* If we've already processed this stmt_list there's no real need to
+ do it again, we could fake it and just recreate the part we need
+ (file name,index -> symtab mapping). If data shows this optimization
+ is useful we can do it then. */
+ first_time = tu_group->primary_symtab == NULL;
+
+ /* We have to handle the case of both a missing DW_AT_stmt_list or bad
+ debug info. */
+ lh = NULL;
+ if (attr != NULL)
+ {
+ line_offset = DW_UNSND (attr);
+ lh = dwarf_decode_line_header (line_offset, cu);
+ }
+ if (lh == NULL)
+ {
+ if (first_time)
+ dwarf2_start_symtab (cu, "", NULL, 0);
+ else
+ {
+ gdb_assert (tu_group->symtabs == NULL);
+ restart_symtab (0);
+ }
+ /* Note: The primary symtab will get allocated at the end. */
+ return;
+ }
+
+ cu->line_header = lh;
+ make_cleanup (free_cu_line_header, cu);
+
+ if (first_time)
+ {
+ dwarf2_start_symtab (cu, "", NULL, 0);
+
+ tu_group->num_symtabs = lh->num_file_names;
+ tu_group->symtabs = XNEWVEC (struct symtab *, lh->num_file_names);
+
+ for (i = 0; i < lh->num_file_names; ++i)
+ {
+ char *dir = NULL;
+ struct file_entry *fe = &lh->file_names[i];
+
+ if (fe->dir_index)
+ dir = lh->include_dirs[fe->dir_index - 1];
+ dwarf2_start_subfile (fe->name, dir, NULL);
+
+ /* Note: We don't have to watch for the main subfile here, type units
+ don't have DW_AT_name. */
+
+ if (current_subfile->symtab == NULL)
+ {
+ /* NOTE: start_subfile will recognize when it's been passed
+ a file it has already seen. So we can't assume there's a
+ simple mapping from lh->file_names to subfiles,
+ lh->file_names may contain dups. */
+ current_subfile->symtab = allocate_symtab (current_subfile->name,
+ objfile);
+ }
+
+ fe->symtab = current_subfile->symtab;
+ tu_group->symtabs[i] = fe->symtab;
+ }
+ }
+ else
+ {
+ restart_symtab (0);
+
+ for (i = 0; i < lh->num_file_names; ++i)
+ {
+ struct file_entry *fe = &lh->file_names[i];
+
+ fe->symtab = tu_group->symtabs[i];
+ }
+ }
+
+ /* The main symtab is allocated last. Type units don't have DW_AT_name
+ so they don't have a "real" (so to speak) symtab anyway.
+ There is later code that will assign the main symtab to all symbols
+ that don't have one. We need to handle the case of a symbol with a
+ missing symtab (DW_AT_decl_file) anyway. */
+}
+
+/* Process DW_TAG_type_unit.
+ For TUs we want to skip the first top level sibling if it's not the
+ actual type being defined by this TU. In this case the first top
+ level sibling is there to provide context only. */
+
+static void
+read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct die_info *child_die;
+
+ prepare_one_comp_unit (cu, die, language_minimal);
+
+ /* Initialize (or reinitialize) the machinery for building symtabs.
+ We do this before processing child DIEs, so that the line header table
+ is available for DW_AT_decl_file. */
+ setup_type_unit_groups (die, cu);
+
+ if (die->child != NULL)
+ {
+ child_die = die->child;
+ while (child_die && child_die->tag)
+ {
+ process_die (child_die, cu);
+ child_die = sibling_die (child_die);
+ }
+ }
+}
+\f
+/* DWO files. */
+
+static hashval_t
+hash_dwo_file (const void *item)
+{
+ const struct dwo_file *dwo_file = item;
+
+ return htab_hash_string (dwo_file->dwo_name);
+}
+
+static int
+eq_dwo_file (const void *item_lhs, const void *item_rhs)
+{
+ const struct dwo_file *lhs = item_lhs;
+ const struct dwo_file *rhs = item_rhs;
+
+ return strcmp (lhs->dwo_name, rhs->dwo_name) == 0;
+}
+
+/* Allocate a hash table for DWO files. */
+
+static htab_t
+allocate_dwo_file_hash_table (void)
+{
+ struct objfile *objfile = dwarf2_per_objfile->objfile;
+
+ return htab_create_alloc_ex (41,
+ hash_dwo_file,
+ eq_dwo_file,
+ NULL,
+ &objfile->objfile_obstack,
+ hashtab_obstack_allocate,
+ dummy_obstack_deallocate);
+}
+
+static hashval_t
+hash_dwo_unit (const void *item)
+{
+ const struct dwo_unit *dwo_unit = item;
+
+ /* This drops the top 32 bits of the id, but is ok for a hash. */
+ return dwo_unit->signature;
+}
+
+static int
+eq_dwo_unit (const void *item_lhs, const void *item_rhs)
+{
+ const struct dwo_unit *lhs = item_lhs;
+ const struct dwo_unit *rhs = item_rhs;
+
+ /* The signature is assumed to be unique within the DWO file.
+ So while object file CU dwo_id's always have the value zero,
+ that's OK, assuming each object file DWO file has only one CU,
+ and that's the rule for now. */
+ return lhs->signature == rhs->signature;
+}
+
+/* Allocate a hash table for DWO CUs,TUs.
+ There is one of these tables for each of CUs,TUs for each DWO file. */
+
+static htab_t
+allocate_dwo_unit_table (struct objfile *objfile)
+{
+ /* Start out with a pretty small number.
+ Generally DWO files contain only one CU and maybe some TUs. */
+ return htab_create_alloc_ex (3,
+ hash_dwo_unit,
+ eq_dwo_unit,
+ NULL,
+ &objfile->objfile_obstack,
+ hashtab_obstack_allocate,
+ dummy_obstack_deallocate);
+}
+
+/* This function is mapped across the sections and remembers the offset and
+ size of each of the DWO debugging sections we are interested in. */
+
+static void
+dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_file_ptr)
+{
+ struct dwo_file *dwo_file = dwo_file_ptr;
+ const struct dwo_section_names *names = &dwo_section_names;
+
+ if (section_is_p (sectp->name, &names->abbrev_dwo))
+ {
+ dwo_file->sections.abbrev.asection = sectp;
+ dwo_file->sections.abbrev.size = bfd_get_section_size (sectp);
+ }
+ else if (section_is_p (sectp->name, &names->info_dwo))
+ {
+ dwo_file->sections.info.asection = sectp;
+ dwo_file->sections.info.size = bfd_get_section_size (sectp);
+ }
+ else if (section_is_p (sectp->name, &names->line_dwo))
+ {
+ dwo_file->sections.line.asection = sectp;
+ dwo_file->sections.line.size = bfd_get_section_size (sectp);
+ }
+ else if (section_is_p (sectp->name, &names->loc_dwo))
+ {
+ dwo_file->sections.loc.asection = sectp;
+ dwo_file->sections.loc.size = bfd_get_section_size (sectp);
+ }
+ else if (section_is_p (sectp->name, &names->macinfo_dwo))
+ {
+ dwo_file->sections.macinfo.asection = sectp;
+ dwo_file->sections.macinfo.size = bfd_get_section_size (sectp);
+ }
+ else if (section_is_p (sectp->name, &names->macro_dwo))
+ {
+ dwo_file->sections.macro.asection = sectp;
+ dwo_file->sections.macro.size = bfd_get_section_size (sectp);
+ }
+ else if (section_is_p (sectp->name, &names->str_dwo))
+ {
+ dwo_file->sections.str.asection = sectp;
+ dwo_file->sections.str.size = bfd_get_section_size (sectp);
+ }
+ else if (section_is_p (sectp->name, &names->str_offsets_dwo))
+ {
+ dwo_file->sections.str_offsets.asection = sectp;
+ dwo_file->sections.str_offsets.size = bfd_get_section_size (sectp);
+ }
+ else if (section_is_p (sectp->name, &names->types_dwo))
+ {
+ struct dwarf2_section_info type_section;
+
+ memset (&type_section, 0, sizeof (type_section));
+ type_section.asection = sectp;
+ type_section.size = bfd_get_section_size (sectp);
+ VEC_safe_push (dwarf2_section_info_def, dwo_file->sections.types,
+ &type_section);
+ }
+}
+
+/* Structure used to pass data to create_debug_info_hash_table_reader. */
+
+struct create_dwo_info_table_data
+{
+ struct dwo_file *dwo_file;
+ htab_t cu_htab;
+};
+
+/* die_reader_func for create_debug_info_hash_table. */
+
+static void
+create_debug_info_hash_table_reader (const struct die_reader_specs *reader,
+ gdb_byte *info_ptr,
+ struct die_info *comp_unit_die,
+ int has_children,
+ void *datap)
+{
+ struct dwarf2_cu *cu = reader->cu;
+ struct objfile *objfile = dwarf2_per_objfile->objfile;
+ sect_offset offset = cu->per_cu->offset;
+ struct dwarf2_section_info *section = cu->per_cu->info_or_types_section;
+ struct create_dwo_info_table_data *data = datap;
+ struct dwo_file *dwo_file = data->dwo_file;
+ htab_t cu_htab = data->cu_htab;
+ void **slot;
+ struct attribute *attr;
+ struct dwo_unit *dwo_unit;
+
+ attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu);
+ if (attr == NULL)
+ {
+ error (_("Dwarf Error: debug entry at offset 0x%x is missing"
+ " its dwo_id [in module %s]"),
+ offset.sect_off, dwo_file->dwo_name);
+ return;
+ }
+
+ dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit);
+ dwo_unit->dwo_file = dwo_file;
+ dwo_unit->signature = DW_UNSND (attr);
+ dwo_unit->info_or_types_section = section;
+ dwo_unit->offset = offset;
+ dwo_unit->length = cu->per_cu->length;
+
+ slot = htab_find_slot (cu_htab, dwo_unit, INSERT);
+ gdb_assert (slot != NULL);
+ if (*slot != NULL)
+ {
+ const struct dwo_unit *dup_dwo_unit = *slot;
+
+ complaint (&symfile_complaints,
+ _("debug entry at offset 0x%x is duplicate to the entry at"
+ " offset 0x%x, dwo_id 0x%s [in module %s]"),
+ offset.sect_off, dup_dwo_unit->offset.sect_off,
+ phex (dwo_unit->signature, sizeof (dwo_unit->signature)),
+ dwo_file->dwo_name);
+ }
+ else
+ *slot = dwo_unit;
+
+ if (dwarf2_read_debug)
+ fprintf_unfiltered (gdb_stdlog, " offset 0x%x, dwo_id 0x%s\n",
+ offset.sect_off,
+ phex (dwo_unit->signature,
+ sizeof (dwo_unit->signature)));
+}
+
+/* Create a hash table to map DWO IDs to their CU entry in .debug_info.dwo. */
+
+static htab_t
+create_debug_info_hash_table (struct dwo_file *dwo_file)
+{
+ struct objfile *objfile = dwarf2_per_objfile->objfile;
+ struct dwarf2_section_info *section = &dwo_file->sections.info;
+ bfd *abfd;
+ htab_t cu_htab;
+ gdb_byte *info_ptr, *end_ptr;
+ struct create_dwo_info_table_data create_dwo_info_table_data;
+
+ dwarf2_read_section (objfile, section);
+ info_ptr = section->buffer;
+
+ if (info_ptr == NULL)
+ return NULL;
+
+ /* We can't set abfd until now because the section may be empty or
+ not present, in which case section->asection will be NULL. */
+ abfd = section->asection->owner;
+
+ if (dwarf2_read_debug)
+ fprintf_unfiltered (gdb_stdlog, "Reading .debug_info.dwo for %s:\n",
+ bfd_get_filename (abfd));
+
+ cu_htab = allocate_dwo_unit_table (objfile);
+
+ create_dwo_info_table_data.dwo_file = dwo_file;
+ create_dwo_info_table_data.cu_htab = cu_htab;
+
+ end_ptr = info_ptr + section->size;
+ while (info_ptr < end_ptr)
+ {
+ struct dwarf2_per_cu_data per_cu;
+
+ memset (&per_cu, 0, sizeof (per_cu));
+ per_cu.objfile = objfile;
+ per_cu.is_debug_types = 0;
+ per_cu.offset.sect_off = info_ptr - section->buffer;
+ per_cu.info_or_types_section = section;
+
+ init_cutu_and_read_dies_no_follow (&per_cu,
+ &dwo_file->sections.abbrev,
+ dwo_file,
+ create_debug_info_hash_table_reader,
+ &create_dwo_info_table_data);
+
+ info_ptr += per_cu.length;
+ }
+
+ return cu_htab;
+}
+
+/* Subroutine of open_dwo_file to simplify it.
+ Open the file specified by FILE_NAME and hand it off to BFD for
+ preliminary analysis. Return a newly initialized bfd *, which
+ includes a canonicalized copy of FILE_NAME.
+ In case of trouble, return NULL.
+ NOTE: This function is derived from symfile_bfd_open. */
+
+static bfd *
+try_open_dwo_file (const char *file_name)
+{
+ bfd *sym_bfd;
+ int desc;
+ char *absolute_name;
+
+ desc = openp (debug_file_directory, OPF_TRY_CWD_FIRST, file_name,
+ O_RDONLY | O_BINARY, &absolute_name);
+ if (desc < 0)
+ return NULL;
+
+ sym_bfd = gdb_bfd_open (absolute_name, gnutarget, desc);
+ if (!sym_bfd)
+ {
+ xfree (absolute_name);
+ return NULL;
+ }
+ xfree (absolute_name);
+ bfd_set_cacheable (sym_bfd, 1);
+
+ if (!bfd_check_format (sym_bfd, bfd_object))
+ {
+ gdb_bfd_unref (sym_bfd); /* This also closes desc. */
+ return NULL;
+ }
+
+ return sym_bfd;
+}
+
+/* Try to open DWO file DWO_NAME.
+ COMP_DIR is the DW_AT_comp_dir attribute.
+ The result is the bfd handle of the file.
+ If there is a problem finding or opening the file, return NULL.
+ Upon success, the canonicalized path of the file is stored in the bfd,
+ same as symfile_bfd_open. */
+
+static bfd *
+open_dwo_file (const char *dwo_name, const char *comp_dir)
+{
+ bfd *abfd;
+
+ if (IS_ABSOLUTE_PATH (dwo_name))
+ return try_open_dwo_file (dwo_name);
+
+ /* Before trying the search path, try DWO_NAME in COMP_DIR. */
+
+ if (comp_dir != NULL)
+ {
+ char *path_to_try = concat (comp_dir, SLASH_STRING, dwo_name, NULL);
+
+ /* NOTE: If comp_dir is a relative path, this will also try the
+ search path, which seems useful. */
+ abfd = try_open_dwo_file (path_to_try);
+ xfree (path_to_try);
+ if (abfd != NULL)
+ return abfd;
+ }
+
+ /* That didn't work, try debug-file-directory, which, despite its name,
+ is a list of paths. */
+
+ if (*debug_file_directory == '\0')
+ return NULL;
+
+ return try_open_dwo_file (dwo_name);
+}
+
+/* Initialize the use of the DWO file specified by DWO_NAME. */
+
+static struct dwo_file *
+init_dwo_file (const char *dwo_name, const char *comp_dir)
+{
+ struct objfile *objfile = dwarf2_per_objfile->objfile;
+ struct dwo_file *dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack,
+ struct dwo_file);
+ bfd *abfd;
+ struct cleanup *cleanups;
+
+ if (dwarf2_read_debug)
+ fprintf_unfiltered (gdb_stdlog, "Reading DWO file %s:\n", dwo_name);
+
+ abfd = open_dwo_file (dwo_name, comp_dir);
+ if (abfd == NULL)
+ return NULL;
+ dwo_file->dwo_name = dwo_name;
+ dwo_file->dwo_bfd = abfd;
+
+ cleanups = make_cleanup (free_dwo_file_cleanup, dwo_file);
+
+ bfd_map_over_sections (abfd, dwarf2_locate_dwo_sections, dwo_file);
+
+ dwo_file->cus = create_debug_info_hash_table (dwo_file);
+
+ dwo_file->tus = create_debug_types_hash_table (dwo_file,
+ dwo_file->sections.types);
+
+ discard_cleanups (cleanups);
+
+ return dwo_file;
+}
+
+/* Lookup DWO file DWO_NAME. */
+
+static struct dwo_file *
+lookup_dwo_file (char *dwo_name, const char *comp_dir)
+{
+ struct dwo_file *dwo_file;
+ struct dwo_file find_entry;
+ void **slot;
+
+ if (dwarf2_per_objfile->dwo_files == NULL)
+ dwarf2_per_objfile->dwo_files = allocate_dwo_file_hash_table ();
- attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
- if (attr)
- {
- unsigned int line_offset = DW_UNSND (attr);
- struct line_header *line_header
- = dwarf_decode_line_header (line_offset, abfd, cu);
+ /* Have we already seen this DWO file? */
+ find_entry.dwo_name = dwo_name;
+ slot = htab_find_slot (dwarf2_per_objfile->dwo_files, &find_entry, INSERT);
- if (line_header)
- {
- cu->line_header = line_header;
- make_cleanup (free_cu_line_header, cu);
- dwarf_decode_lines (line_header, comp_dir, cu, NULL, want_line_info);
- }
- }
+ /* If not, read it in and build a table of the DWOs it contains. */
+ if (*slot == NULL)
+ *slot = init_dwo_file (dwo_name, comp_dir);
+
+ /* NOTE: This will be NULL if unable to open the file. */
+ dwo_file = *slot;
+
+ return dwo_file;
}
-/* Process DW_TAG_compile_unit. */
+/* Lookup the DWO CU referenced from THIS_CU in DWO file DWO_NAME.
+ If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
+ SIGNATURE is the "dwo_id" of the CU (for consistency we use the same
+ nomenclature as TUs).
+ The result is a pointer to the dwo_unit object or NULL if we didn't find it
+ (dwo_id mismatch or couldn't find the DWO file). */
-static void
-read_file_scope (struct die_info *die, struct dwarf2_cu *cu)
+static struct dwo_unit *
+lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu,
+ char *dwo_name, const char *comp_dir,
+ ULONGEST signature)
{
struct objfile *objfile = dwarf2_per_objfile->objfile;
- struct cleanup *back_to = make_cleanup (null_cleanup, 0);
- CORE_ADDR lowpc = ((CORE_ADDR) -1);
- CORE_ADDR highpc = ((CORE_ADDR) 0);
- struct attribute *attr;
- char *name = NULL;
- char *comp_dir = NULL;
- struct die_info *child_die;
- bfd *abfd = objfile->obfd;
- CORE_ADDR baseaddr;
+ struct dwo_file *dwo_file;
- baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
+ dwo_file = lookup_dwo_file (dwo_name, comp_dir);
+ if (dwo_file == NULL)
+ return NULL;
- get_scope_pc_bounds (die, &lowpc, &highpc, cu);
+ /* Look up the DWO using its signature(dwo_id). */
- /* If we didn't find a lowpc, set it to highpc to avoid complaints
- from finish_block. */
- if (lowpc == ((CORE_ADDR) -1))
- lowpc = highpc;
- lowpc += baseaddr;
- highpc += baseaddr;
+ if (dwo_file->cus != NULL)
+ {
+ struct dwo_unit find_dwo_cu, *dwo_cu;
- find_file_and_directory (die, cu, &name, &comp_dir);
+ find_dwo_cu.signature = signature;
+ dwo_cu = htab_find (dwo_file->cus, &find_dwo_cu);
- prepare_one_comp_unit (cu, die);
+ if (dwo_cu != NULL)
+ return dwo_cu;
+ }
- /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
- standardised yet. As a workaround for the language detection we fall
- back to the DW_AT_producer string. */
- if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL)
- cu->language = language_opencl;
+ /* We didn't find it. This must mean a dwo_id mismatch. */
- /* Similar hack for Go. */
- if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL)
- set_cu_language (DW_LANG_Go, cu);
+ complaint (&symfile_complaints,
+ _("Could not find DWO CU referenced by CU at offset 0x%x"
+ " [in module %s]"),
+ this_cu->offset.sect_off, objfile->name);
+ return NULL;
+}
- /* We assume that we're processing GCC output. */
- processing_gcc_compilation = 2;
+/* Lookup the DWO TU referenced from THIS_TU in DWO file DWO_NAME.
+ If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
+ The result is a pointer to the dwo_unit object or NULL if we didn't find it
+ (dwo_id mismatch or couldn't find the DWO file). */
- processing_has_namespace_info = 0;
+static struct dwo_unit *
+lookup_dwo_type_unit (struct signatured_type *this_tu,
+ char *dwo_name, const char *comp_dir)
+{
+ struct objfile *objfile = dwarf2_per_objfile->objfile;
+ struct dwo_file *dwo_file;
- start_symtab (name, comp_dir, lowpc);
- record_debugformat ("DWARF 2");
- record_producer (cu->producer);
+ dwo_file = lookup_dwo_file (dwo_name, comp_dir);
+ if (dwo_file == NULL)
+ return NULL;
- /* Decode line number information if present. We do this before
- processing child DIEs, so that the line header table is available
- for DW_AT_decl_file. */
- handle_DW_AT_stmt_list (die, cu, comp_dir, 1);
+ /* Look up the DWO using its signature(dwo_id). */
- /* Process all dies in compilation unit. */
- if (die->child != NULL)
+ if (dwo_file->tus != NULL)
{
- child_die = die->child;
- while (child_die && child_die->tag)
- {
- process_die (child_die, cu);
- child_die = sibling_die (child_die);
- }
- }
+ struct dwo_unit find_dwo_tu, *dwo_tu;
- /* Decode macro information, if present. Dwarf 2 macro information
- refers to information in the line number info statement program
- header, so we can only read it if we've read the header
- successfully. */
- attr = dwarf2_attr (die, DW_AT_GNU_macros, cu);
- if (attr && cu->line_header)
- {
- if (dwarf2_attr (die, DW_AT_macro_info, cu))
- complaint (&symfile_complaints,
- _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
+ find_dwo_tu.signature = this_tu->signature;
+ dwo_tu = htab_find (dwo_file->tus, &find_dwo_tu);
- dwarf_decode_macros (cu->line_header, DW_UNSND (attr),
- comp_dir, abfd, cu,
- &dwarf2_per_objfile->macro, 1);
+ if (dwo_tu != NULL)
+ return dwo_tu;
}
- else
- {
- attr = dwarf2_attr (die, DW_AT_macro_info, cu);
- if (attr && cu->line_header)
- {
- unsigned int macro_offset = DW_UNSND (attr);
- dwarf_decode_macros (cu->line_header, macro_offset,
- comp_dir, abfd, cu,
- &dwarf2_per_objfile->macinfo, 0);
- }
- }
+ /* We didn't find it. This must mean a dwo_id mismatch. */
- do_cleanups (back_to);
+ complaint (&symfile_complaints,
+ _("Could not find DWO TU referenced by TU at offset 0x%x"
+ " [in module %s]"),
+ this_tu->per_cu.offset.sect_off, objfile->name);
+ return NULL;
}
-/* Process DW_TAG_type_unit.
- For TUs we want to skip the first top level sibling if it's not the
- actual type being defined by this TU. In this case the first top
- level sibling is there to provide context only. */
+/* Free all resources associated with DWO_FILE.
+ Close the DWO file and munmap the sections.
+ All memory should be on the objfile obstack. */
static void
-read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu)
+free_dwo_file (struct dwo_file *dwo_file, struct objfile *objfile)
{
- struct objfile *objfile = cu->objfile;
- struct cleanup *back_to = make_cleanup (null_cleanup, 0);
- CORE_ADDR lowpc;
- struct attribute *attr;
- char *name = NULL;
- char *comp_dir = NULL;
- struct die_info *child_die;
- bfd *abfd = objfile->obfd;
-
- /* start_symtab needs a low pc, but we don't really have one.
- Do what read_file_scope would do in the absence of such info. */
- lowpc = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
-
- /* Find the filename. Do not use dwarf2_name here, since the filename
- is not a source language identifier. */
- attr = dwarf2_attr (die, DW_AT_name, cu);
- if (attr)
- name = DW_STRING (attr);
-
- attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
- if (attr)
- comp_dir = DW_STRING (attr);
- else if (name != NULL && IS_ABSOLUTE_PATH (name))
- {
- comp_dir = ldirname (name);
- if (comp_dir != NULL)
- make_cleanup (xfree, comp_dir);
- }
+ int ix;
+ struct dwarf2_section_info *section;
- if (name == NULL)
- name = "<unknown>";
+ gdb_assert (dwo_file->dwo_bfd != objfile->obfd);
+ gdb_bfd_unref (dwo_file->dwo_bfd);
- prepare_one_comp_unit (cu, die);
+ VEC_free (dwarf2_section_info_def, dwo_file->sections.types);
+}
- /* We assume that we're processing GCC output. */
- processing_gcc_compilation = 2;
+/* Wrapper for free_dwo_file for use in cleanups. */
- processing_has_namespace_info = 0;
+static void
+free_dwo_file_cleanup (void *arg)
+{
+ struct dwo_file *dwo_file = (struct dwo_file *) arg;
+ struct objfile *objfile = dwarf2_per_objfile->objfile;
- start_symtab (name, comp_dir, lowpc);
- record_debugformat ("DWARF 2");
- record_producer (cu->producer);
+ free_dwo_file (dwo_file, objfile);
+}
- /* Decode line number information if present. We do this before
- processing child DIEs, so that the line header table is available
- for DW_AT_decl_file.
- We don't need the pc/line-number mapping for type units. */
- handle_DW_AT_stmt_list (die, cu, comp_dir, 0);
+/* Traversal function for free_dwo_files. */
- /* Process the dies in the type unit. */
- if (die->child == NULL)
- {
- dump_die_for_error (die);
- error (_("Dwarf Error: Missing children for type unit [in module %s]"),
- bfd_get_filename (abfd));
- }
+static int
+free_dwo_file_from_slot (void **slot, void *info)
+{
+ struct dwo_file *dwo_file = (struct dwo_file *) *slot;
+ struct objfile *objfile = (struct objfile *) info;
- child_die = die->child;
+ free_dwo_file (dwo_file, objfile);
- while (child_die && child_die->tag)
- {
- process_die (child_die, cu);
+ return 1;
+}
- child_die = sibling_die (child_die);
- }
+/* Free all resources associated with DWO_FILES. */
- do_cleanups (back_to);
+static void
+free_dwo_files (htab_t dwo_files, struct objfile *objfile)
+{
+ htab_traverse_noresize (dwo_files, free_dwo_file_from_slot, objfile);
}
+\f
+/* Read in various DIEs. */
/* qsort helper for inherit_abstract_dies. */
child_die && child_die->tag;
child_die = sibling_die (child_die))
{
- struct dwarf2_locexpr_baton *dlbaton;
struct call_site_parameter *parameter;
+ struct attribute *loc, *origin;
if (child_die->tag != DW_TAG_GNU_call_site_parameter)
{
gdb_assert (call_site->parameter_count < nparams);
parameter = &call_site->parameter[call_site->parameter_count];
- /* DW_AT_location specifies the register number. Value of the data
- assumed for the register is contained in DW_AT_GNU_call_site_value. */
+ /* DW_AT_location specifies the register number or DW_AT_abstract_origin
+ specifies DW_TAG_formal_parameter. Value of the data assumed for the
+ register is contained in DW_AT_GNU_call_site_value. */
+
+ loc = dwarf2_attr (child_die, DW_AT_location, cu);
+ origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu);
+ if (loc == NULL && origin != NULL && is_ref_attr (origin))
+ {
+ sect_offset offset;
- attr = dwarf2_attr (child_die, DW_AT_location, cu);
- if (!attr || !attr_form_is_block (attr))
+ parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET;
+ offset = dwarf2_get_ref_die_offset (origin);
+ if (!offset_in_cu_p (&cu->header, offset))
+ {
+ /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
+ binding can be done only inside one CU. Such referenced DIE
+ therefore cannot be even moved to DW_TAG_partial_unit. */
+ complaint (&symfile_complaints,
+ _("DW_AT_abstract_origin offset is not in CU for "
+ "DW_TAG_GNU_call_site child DIE 0x%x "
+ "[in module %s]"),
+ child_die->offset.sect_off, objfile->name);
+ continue;
+ }
+ parameter->u.param_offset.cu_off = (offset.sect_off
+ - cu->header.offset.sect_off);
+ }
+ else if (loc == NULL || origin != NULL || !attr_form_is_block (loc))
{
complaint (&symfile_complaints,
_("No DW_FORM_block* DW_AT_location for "
child_die->offset.sect_off, objfile->name);
continue;
}
- parameter->dwarf_reg = dwarf_block_to_dwarf_reg (DW_BLOCK (attr)->data,
- &DW_BLOCK (attr)->data[DW_BLOCK (attr)->size]);
- if (parameter->dwarf_reg == -1
- && !dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (attr)->data,
- &DW_BLOCK (attr)->data[DW_BLOCK (attr)->size],
- ¶meter->fb_offset))
+ else
{
- complaint (&symfile_complaints,
- _("Only single DW_OP_reg or DW_OP_fbreg is supported "
- "for DW_FORM_block* DW_AT_location for "
- "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
- child_die->offset.sect_off, objfile->name);
- continue;
+ parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg
+ (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]);
+ if (parameter->u.dwarf_reg != -1)
+ parameter->kind = CALL_SITE_PARAMETER_DWARF_REG;
+ else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data,
+ &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size],
+ ¶meter->u.fb_offset))
+ parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET;
+ else
+ {
+ complaint (&symfile_complaints,
+ _("Only single DW_OP_reg or DW_OP_fbreg is supported "
+ "for DW_FORM_block* DW_AT_location is supported for "
+ "DW_TAG_GNU_call_site child DIE 0x%x "
+ "[in module %s]"),
+ child_die->offset.sect_off, objfile->name);
+ continue;
+ }
}
attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu);
range_beginning += base;
range_end += base;
+ /* A not-uncommon case of bad debug info.
+ Don't pollute the addrmap with bad data. */
+ if (range_beginning + baseaddr == 0
+ && !dwarf2_per_objfile->has_section_at_zero)
+ {
+ complaint (&symfile_complaints,
+ _(".debug_ranges entry has start address of zero"
+ " [in module %s]"), objfile->name);
+ continue;
+ }
+
if (ranges_pst != NULL)
addrmap_set_empty (objfile->psymtabs_addrmap,
range_beginning + baseaddr,
if (attr)
{
low = DW_ADDR (attr);
- if (attr_high->form == DW_FORM_addr)
+ if (attr_high->form == DW_FORM_addr
+ || attr_high->form == DW_FORM_GNU_addr_index)
high = DW_ADDR (attr_high);
else
high = low + DW_UNSND (attr_high);
attr = dwarf2_attr (die, DW_AT_ranges, cu);
if (attr != NULL)
{
+ unsigned int ranges_offset = DW_UNSND (attr) + cu->ranges_base;
+
/* Value of the DW_AT_ranges attribute is the offset in the
.debug_ranges section. */
- if (!dwarf2_ranges_read (DW_UNSND (attr), &low, &high, cu, pst))
+ if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst))
return 0;
/* Found discontinuous range of addresses. */
ret = -1;
{
CORE_ADDR low = DW_ADDR (attr);
CORE_ADDR high;
- if (attr_high->form == DW_FORM_addr)
+ if (attr_high->form == DW_FORM_addr
+ || attr_high->form == DW_FORM_GNU_addr_index)
high = DW_ADDR (attr_high);
else
high = low + DW_UNSND (attr_high);
/* The value of the DW_AT_ranges attribute is the offset of the
address range list in the .debug_ranges section. */
- unsigned long offset = DW_UNSND (attr);
+ unsigned long offset = DW_UNSND (attr) + cu->ranges_base;
gdb_byte *buffer = dwarf2_per_objfile->ranges.buffer + offset;
/* For some target architectures, but not others, the
if (start == end)
continue;
- record_block_range (block,
- baseaddr + base + start,
- baseaddr + base + end - 1);
+ start += base + baseaddr;
+ end += base + baseaddr;
+
+ /* A not-uncommon case of bad debug info.
+ Don't pollute the addrmap with bad data. */
+ if (start == 0 && !dwarf2_per_objfile->has_section_at_zero)
+ {
+ complaint (&symfile_complaints,
+ _(".debug_ranges entry has start address of zero"
+ " [in module %s]"), objfile->name);
+ continue;
+ }
+
+ record_block_range (block, start, end - 1);
}
}
}
}
-/* Check for GCC PR debug/45124 fix which is not present in any G++ version up
- to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
- during 4.6.0 experimental. */
+/* Check whether the producer field indicates either of GCC < 4.6, or the
+ Intel C/C++ compiler, and cache the result in CU. */
-static int
-producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu)
+static void
+check_producer (struct dwarf2_cu *cu)
{
const char *cs;
int major, minor, release;
- int result = 0;
if (cu->producer == NULL)
{
for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
interpreted incorrectly by GDB now - GCC PR debug/48229. */
-
- return 0;
- }
-
- if (cu->checked_producer)
- return cu->producer_is_gxx_lt_4_6;
-
- /* Skip any identifier after "GNU " - such as "C++" or "Java". */
-
- if (strncmp (cu->producer, "GNU ", strlen ("GNU ")) != 0)
- {
- /* For non-GCC compilers expect their behavior is DWARF version
- compliant. */
}
- else
+ else if (strncmp (cu->producer, "GNU ", strlen ("GNU ")) == 0)
{
+ /* Skip any identifier after "GNU " - such as "C++" or "Java". */
+
cs = &cu->producer[strlen ("GNU ")];
while (*cs && !isdigit (*cs))
cs++;
/* Not recognized as GCC. */
}
else
- result = major < 4 || (major == 4 && minor < 6);
+ cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6);
+ }
+ else if (strncmp (cu->producer, "Intel(R) C", strlen ("Intel(R) C")) == 0)
+ cu->producer_is_icc = 1;
+ else
+ {
+ /* For other non-GCC compilers, expect their behavior is DWARF version
+ compliant. */
}
cu->checked_producer = 1;
- cu->producer_is_gxx_lt_4_6 = result;
+}
- return result;
+/* Check for GCC PR debug/45124 fix which is not present in any G++ version up
+ to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
+ during 4.6.0 experimental. */
+
+static int
+producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu)
+{
+ if (!cu->checked_producer)
+ check_producer (cu);
+
+ return cu->producer_is_gxx_lt_4_6;
}
/* Return the default accessibility type if it is not overriden by
smash_to_methodptr_type (type, new_type);
}
+/* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
+ (icc). */
+
+static int
+producer_is_icc (struct dwarf2_cu *cu)
+{
+ if (!cu->checked_producer)
+ check_producer (cu);
+
+ return cu->producer_is_icc;
+}
+
/* Called when we find the DIE that starts a structure or union scope
(definition) to create a type for the structure or union. Fill in
the type's name and general properties; the members will not be
/* If the definition of this type lives in .debug_types, read that type.
Don't follow DW_AT_specification though, that will take us back up
the chain and we want to go down. */
- attr = dwarf2_attr_no_follow (die, DW_AT_signature, cu);
+ attr = dwarf2_attr_no_follow (die, DW_AT_signature);
if (attr)
{
struct dwarf2_cu *type_cu = cu;
TYPE_LENGTH (type) = 0;
}
- TYPE_STUB_SUPPORTED (type) = 1;
+ if (producer_is_icc (cu))
+ {
+ /* ICC does not output the required DW_AT_declaration
+ on incomplete types, but gives them a size of zero. */
+ }
+ else
+ TYPE_STUB_SUPPORTED (type) = 1;
+
if (die_is_declaration (die, cu))
TYPE_STUB (type) = 1;
else if (attr == NULL && die->child == NULL
/* If the definition of this type lives in .debug_types, read that type.
Don't follow DW_AT_specification though, that will take us back up
the chain and we want to go down. */
- attr = dwarf2_attr_no_follow (die, DW_AT_signature, cu);
+ attr = dwarf2_attr_no_follow (die, DW_AT_signature);
if (attr)
{
struct dwarf2_cu *type_cu = cu;
actually available. Note that we do not want to do this for all
enums which are just declarations, because C++0x allows forward
enum declarations. */
- if (cu->per_cu->debug_types_section
+ if (cu->per_cu->is_debug_types
&& die_is_declaration (die, cu))
{
struct signatured_type *sig_type;
sig_type
= lookup_signatured_type_at_offset (dwarf2_per_objfile->objfile,
- cu->per_cu->debug_types_section,
+ cu->per_cu->info_or_types_section,
cu->per_cu->offset);
- if (sig_type->per_cu.offset.sect_off + sig_type->type_offset.cu_off
- != die->offset.sect_off)
+ gdb_assert (sig_type->type_offset_in_section.sect_off != 0);
+ if (sig_type->type_offset_in_section.sect_off != die->offset.sect_off)
return;
}
}
}
-/* Read the die from the .debug_info section buffer. Set DIEP to
- point to a newly allocated die with its information, except for its
- child, sibling, and parent fields. Set HAS_CHILDREN to tell
- whether the die has children or not. */
+/* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
+ attributes.
+ The caller is responsible for filling in the extra attributes
+ and updating (*DIEP)->num_attrs.
+ Set DIEP to point to a newly allocated die with its information,
+ except for its child, sibling, and parent fields.
+ Set HAS_CHILDREN to tell whether the die has children or not. */
static gdb_byte *
-read_full_die (const struct die_reader_specs *reader,
- struct die_info **diep, gdb_byte *info_ptr,
- int *has_children)
+read_full_die_1 (const struct die_reader_specs *reader,
+ struct die_info **diep, gdb_byte *info_ptr,
+ int *has_children, int num_extra_attrs)
{
unsigned int abbrev_number, bytes_read, i;
sect_offset offset;
return info_ptr;
}
- abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
+ abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number);
if (!abbrev)
error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
abbrev_number,
bfd_get_filename (abfd));
- die = dwarf_alloc_die (cu, abbrev->num_attrs);
+ die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs);
die->offset = offset;
die->tag = abbrev->tag;
die->abbrev = abbrev_number;
+ /* Make the result usable.
+ The caller needs to update num_attrs after adding the extra
+ attributes. */
die->num_attrs = abbrev->num_attrs;
for (i = 0; i < abbrev->num_attrs; ++i)
return info_ptr;
}
-/* In DWARF version 2, the description of the debugging information is
- stored in a separate .debug_abbrev section. Before we read any
- dies from a section we read in all abbreviations and install them
- in a hash table. This function also sets flags in CU describing
- the data found in the abbrev table. */
+/* Read a die and all its attributes.
+ Set DIEP to point to a newly allocated die with its information,
+ except for its child, sibling, and parent fields.
+ Set HAS_CHILDREN to tell whether the die has children or not. */
+
+static gdb_byte *
+read_full_die (const struct die_reader_specs *reader,
+ struct die_info **diep, gdb_byte *info_ptr,
+ int *has_children)
+{
+ return read_full_die_1 (reader, diep, info_ptr, has_children, 0);
+}
+\f
+/* Abbreviation tables.
+
+ In DWARF version 2, the description of the debugging information is
+ stored in a separate .debug_abbrev section. Before we read any
+ dies from a section we read in all abbreviations and install them
+ in a hash table. */
+
+/* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
+
+static struct abbrev_info *
+abbrev_table_alloc_abbrev (struct abbrev_table *abbrev_table)
+{
+ struct abbrev_info *abbrev;
+
+ abbrev = (struct abbrev_info *)
+ obstack_alloc (&abbrev_table->abbrev_obstack, sizeof (struct abbrev_info));
+ memset (abbrev, 0, sizeof (struct abbrev_info));
+ return abbrev;
+}
+
+/* Add an abbreviation to the table. */
+
+static void
+abbrev_table_add_abbrev (struct abbrev_table *abbrev_table,
+ unsigned int abbrev_number,
+ struct abbrev_info *abbrev)
+{
+ unsigned int hash_number;
+
+ hash_number = abbrev_number % ABBREV_HASH_SIZE;
+ abbrev->next = abbrev_table->abbrevs[hash_number];
+ abbrev_table->abbrevs[hash_number] = abbrev;
+}
+
+/* Look up an abbrev in the table.
+ Returns NULL if the abbrev is not found. */
+
+static struct abbrev_info *
+abbrev_table_lookup_abbrev (const struct abbrev_table *abbrev_table,
+ unsigned int abbrev_number)
+{
+ unsigned int hash_number;
+ struct abbrev_info *abbrev;
+
+ hash_number = abbrev_number % ABBREV_HASH_SIZE;
+ abbrev = abbrev_table->abbrevs[hash_number];
-static void
-dwarf2_read_abbrevs (struct dwarf2_cu *cu,
- struct dwarf2_section_info *abbrev_section)
+ while (abbrev)
+ {
+ if (abbrev->number == abbrev_number)
+ return abbrev;
+ abbrev = abbrev->next;
+ }
+ return NULL;
+}
+/* Read in an abbrev table. */
+
+static struct abbrev_table *
+abbrev_table_read_table (struct dwarf2_section_info *section,
+ sect_offset offset)
{
- bfd *abfd = abbrev_section->asection->owner;
- struct comp_unit_head *cu_header = &cu->header;
+ struct objfile *objfile = dwarf2_per_objfile->objfile;
+ bfd *abfd = section->asection->owner;
+ struct abbrev_table *abbrev_table;
gdb_byte *abbrev_ptr;
struct abbrev_info *cur_abbrev;
unsigned int abbrev_number, bytes_read, abbrev_name;
- unsigned int abbrev_form, hash_number;
+ unsigned int abbrev_form;
struct attr_abbrev *cur_attrs;
unsigned int allocated_attrs;
- /* Initialize dwarf2 abbrevs. */
- obstack_init (&cu->abbrev_obstack);
- cu->dwarf2_abbrevs = obstack_alloc (&cu->abbrev_obstack,
- (ABBREV_HASH_SIZE
- * sizeof (struct abbrev_info *)));
- memset (cu->dwarf2_abbrevs, 0,
- ABBREV_HASH_SIZE * sizeof (struct abbrev_info *));
+ abbrev_table = XMALLOC (struct abbrev_table);
+ abbrev_table->offset = offset;
+ obstack_init (&abbrev_table->abbrev_obstack);
+ abbrev_table->abbrevs = obstack_alloc (&abbrev_table->abbrev_obstack,
+ (ABBREV_HASH_SIZE
+ * sizeof (struct abbrev_info *)));
+ memset (abbrev_table->abbrevs, 0,
+ ABBREV_HASH_SIZE * sizeof (struct abbrev_info *));
- dwarf2_read_section (cu->objfile, abbrev_section);
- abbrev_ptr = abbrev_section->buffer + cu_header->abbrev_offset.sect_off;
+ dwarf2_read_section (objfile, section);
+ abbrev_ptr = section->buffer + offset.sect_off;
abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
abbrev_ptr += bytes_read;
/* Loop until we reach an abbrev number of 0. */
while (abbrev_number)
{
- cur_abbrev = dwarf_alloc_abbrev (cu);
+ cur_abbrev = abbrev_table_alloc_abbrev (abbrev_table);
/* read in abbrev header */
cur_abbrev->number = abbrev_number;
abbrev_ptr += bytes_read;
}
- cur_abbrev->attrs = obstack_alloc (&cu->abbrev_obstack,
+ cur_abbrev->attrs = obstack_alloc (&abbrev_table->abbrev_obstack,
(cur_abbrev->num_attrs
* sizeof (struct attr_abbrev)));
memcpy (cur_abbrev->attrs, cur_attrs,
cur_abbrev->num_attrs * sizeof (struct attr_abbrev));
- hash_number = abbrev_number % ABBREV_HASH_SIZE;
- cur_abbrev->next = cu->dwarf2_abbrevs[hash_number];
- cu->dwarf2_abbrevs[hash_number] = cur_abbrev;
+ abbrev_table_add_abbrev (abbrev_table, abbrev_number, cur_abbrev);
/* Get next abbreviation.
Under Irix6 the abbreviations for a compilation unit are not
already read (which means we are about to read the abbreviations
for the next compile unit) or if the end of the abbreviation
table is reached. */
- if ((unsigned int) (abbrev_ptr - abbrev_section->buffer)
- >= abbrev_section->size)
+ if ((unsigned int) (abbrev_ptr - section->buffer) >= section->size)
break;
abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
abbrev_ptr += bytes_read;
- if (dwarf2_lookup_abbrev (abbrev_number, cu) != NULL)
+ if (abbrev_table_lookup_abbrev (abbrev_table, abbrev_number) != NULL)
break;
}
xfree (cur_attrs);
+ return abbrev_table;
}
-/* Release the memory used by the abbrev table for a compilation unit. */
+/* Free the resources held by ABBREV_TABLE. */
static void
-dwarf2_free_abbrev_table (void *ptr_to_cu)
+abbrev_table_free (struct abbrev_table *abbrev_table)
{
- struct dwarf2_cu *cu = ptr_to_cu;
-
- obstack_free (&cu->abbrev_obstack, NULL);
- cu->dwarf2_abbrevs = NULL;
+ obstack_free (&abbrev_table->abbrev_obstack, NULL);
+ xfree (abbrev_table);
}
-/* Lookup an abbrev_info structure in the abbrev hash table. */
+/* Same as abbrev_table_free but as a cleanup.
+ We pass in a pointer to the pointer to the table so that we can
+ set the pointer to NULL when we're done. It also simplifies
+ build_type_unit_groups. */
-static struct abbrev_info *
-dwarf2_lookup_abbrev (unsigned int number, struct dwarf2_cu *cu)
+static void
+abbrev_table_free_cleanup (void *table_ptr)
{
- unsigned int hash_number;
- struct abbrev_info *abbrev;
+ struct abbrev_table **abbrev_table_ptr = table_ptr;
- hash_number = number % ABBREV_HASH_SIZE;
- abbrev = cu->dwarf2_abbrevs[hash_number];
+ if (*abbrev_table_ptr != NULL)
+ abbrev_table_free (*abbrev_table_ptr);
+ *abbrev_table_ptr = NULL;
+}
- while (abbrev)
- {
- if (abbrev->number == number)
- return abbrev;
- else
- abbrev = abbrev->next;
- }
- return NULL;
+/* Read the abbrev table for CU from ABBREV_SECTION. */
+
+static void
+dwarf2_read_abbrevs (struct dwarf2_cu *cu,
+ struct dwarf2_section_info *abbrev_section)
+{
+ cu->abbrev_table =
+ abbrev_table_read_table (abbrev_section, cu->header.abbrev_offset);
}
+/* Release the memory used by the abbrev table for a compilation unit. */
+
+static void
+dwarf2_free_abbrev_table (void *ptr_to_cu)
+{
+ struct dwarf2_cu *cu = ptr_to_cu;
+
+ abbrev_table_free (cu->abbrev_table);
+ /* Set this to NULL so that we SEGV if we try to read it later,
+ and also because free_comp_unit verifies this is NULL. */
+ cu->abbrev_table = NULL;
+}
+\f
/* Returns nonzero if TAG represents a type that we might generate a partial
symbol for. */
&& abbrev->tag != DW_TAG_variable
&& abbrev->tag != DW_TAG_namespace
&& abbrev->tag != DW_TAG_module
- && abbrev->tag != DW_TAG_member)
+ && abbrev->tag != DW_TAG_member
+ && abbrev->tag != DW_TAG_imported_unit)
{
/* Otherwise we skip to the next sibling, if any. */
info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev);
switch (part_die->tag)
{
case DW_TAG_compile_unit:
+ case DW_TAG_partial_unit:
case DW_TAG_type_unit:
/* Compilation units have a DW_AT_name that is a filename, not
a source language identifier. */
break;
case DW_AT_high_pc:
has_high_pc_attr = 1;
- if (attr.form == DW_FORM_addr)
+ if (attr.form == DW_FORM_addr
+ || attr.form == DW_FORM_GNU_addr_index)
part_die->highpc = DW_ADDR (&attr);
else
{
/* Support the .debug_loc offsets. */
if (attr_form_is_block (&attr))
{
- part_die->locdesc = DW_BLOCK (&attr);
+ part_die->d.locdesc = DW_BLOCK (&attr);
}
else if (attr_form_is_section_offset (&attr))
{
case DW_AT_extension:
part_die->has_specification = 1;
part_die->spec_offset = dwarf2_get_ref_die_offset (&attr);
+ part_die->spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt
+ || cu->per_cu->is_dwz);
break;
case DW_AT_sibling:
/* Ignore absolute siblings, they might point outside of
|| DW_UNSND (&attr) == DW_INL_declared_inlined)
part_die->may_be_inlined = 1;
break;
+
+ case DW_AT_import:
+ if (part_die->tag == DW_TAG_imported_unit)
+ {
+ part_die->d.offset = dwarf2_get_ref_die_offset (&attr);
+ part_die->is_dwz = (attr.form == DW_FORM_GNU_ref_alt
+ || cu->per_cu->is_dwz);
+ }
+ break;
+
default:
break;
}
DW_FORM_ref_sig8). */
static struct partial_die_info *
-find_partial_die (sect_offset offset, struct dwarf2_cu *cu)
+find_partial_die (sect_offset offset, int offset_in_dwz, struct dwarf2_cu *cu)
{
struct objfile *objfile = cu->objfile;
struct dwarf2_per_cu_data *per_cu = NULL;
struct partial_die_info *pd = NULL;
- if (offset_in_cu_p (&cu->header, offset))
+ if (offset_in_dwz == cu->per_cu->is_dwz
+ && offset_in_cu_p (&cu->header, offset))
{
pd = find_partial_die_in_comp_unit (offset, cu);
if (pd != NULL)
else
{
/* TUs don't reference other CUs/TUs (except via type signatures). */
- if (cu->per_cu->debug_types_section)
+ if (cu->per_cu->is_debug_types)
{
error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
" external reference to offset 0x%lx [in module %s].\n"),
(long) cu->header.offset.sect_off, (long) offset.sect_off,
bfd_get_filename (objfile->obfd));
}
- per_cu = dwarf2_find_containing_comp_unit (offset, objfile);
+ per_cu = dwarf2_find_containing_comp_unit (offset, offset_in_dwz,
+ objfile);
if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL)
load_partial_comp_unit (per_cu);
if (pd == NULL && per_cu->load_all_dies == 0)
{
- /* FIXME: The testsuite doesn't trigger this code path.
- http://sourceware.org/bugzilla/show_bug.cgi?id=13961 */
-
- free_one_cached_comp_unit (per_cu);
per_cu->load_all_dies = 1;
+
+ /* This is nasty. When we reread the DIEs, somewhere up the call chain
+ THIS_CU->cu may already be in use. So we can't just free it and
+ replace its DIEs with the ones we read in. Instead, we leave those
+ DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
+ and clobber THIS_CU->cu->partial_dies with the hash table for the new
+ set. */
load_partial_comp_unit (per_cu);
pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
real_pdi = struct_pdi;
while (real_pdi->has_specification)
- real_pdi = find_partial_die (real_pdi->spec_offset, cu);
+ real_pdi = find_partial_die (real_pdi->spec_offset,
+ real_pdi->spec_is_dwz, cu);
if (real_pdi->die_parent != NULL)
return;
{
struct partial_die_info *spec_die;
- spec_die = find_partial_die (part_die->spec_offset, cu);
+ spec_die = find_partial_die (part_die->spec_offset,
+ part_die->spec_is_dwz, cu);
fixup_partial_die (spec_die, cu);
&cu->header, &bytes_read);
info_ptr += bytes_read;
break;
+ case DW_FORM_GNU_ref_alt:
+ DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read);
+ info_ptr += bytes_read;
+ break;
case DW_FORM_addr:
DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
info_ptr += bytes_read;
info_ptr += bytes_read;
break;
case DW_FORM_strp:
- DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header,
- &bytes_read);
- DW_STRING_IS_CANONICAL (attr) = 0;
- info_ptr += bytes_read;
+ if (!cu->per_cu->is_dwz)
+ {
+ DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header,
+ &bytes_read);
+ DW_STRING_IS_CANONICAL (attr) = 0;
+ info_ptr += bytes_read;
+ break;
+ }
+ /* FALLTHROUGH */
+ case DW_FORM_GNU_strp_alt:
+ {
+ struct dwz_file *dwz = dwarf2_get_dwz_file ();
+ LONGEST str_offset = read_offset (abfd, info_ptr, cu_header,
+ &bytes_read);
+
+ DW_STRING (attr) = read_indirect_string_from_dwz (dwz, str_offset);
+ DW_STRING_IS_CANONICAL (attr) = 0;
+ info_ptr += bytes_read;
+ }
break;
case DW_FORM_exprloc:
case DW_FORM_block:
info_ptr += bytes_read;
info_ptr = read_attribute_value (reader, attr, form, info_ptr);
break;
+ case DW_FORM_GNU_addr_index:
+ if (reader->dwo_file == NULL)
+ {
+ /* For now flag a hard error.
+ Later we can turn this into a complaint. */
+ error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
+ dwarf_form_name (form),
+ bfd_get_filename (abfd));
+ }
+ DW_ADDR (attr) = read_addr_index_from_leb128 (cu, info_ptr, &bytes_read);
+ info_ptr += bytes_read;
+ break;
+ case DW_FORM_GNU_str_index:
+ if (reader->dwo_file == NULL)
+ {
+ /* For now flag a hard error.
+ Later we can turn this into a complaint if warranted. */
+ error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
+ dwarf_form_name (form),
+ bfd_get_filename (abfd));
+ }
+ {
+ ULONGEST str_index =
+ read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
+
+ DW_STRING (attr) = read_str_index (reader, cu, str_index);
+ DW_STRING_IS_CANONICAL (attr) = 0;
+ info_ptr += bytes_read;
+ }
+ break;
default:
error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
dwarf_form_name (form),
bfd_get_filename (abfd));
}
+ /* Super hack. */
+ if (cu->per_cu->is_dwz && is_ref_attr (attr))
+ attr->form = DW_FORM_GNU_ref_alt;
+
/* We have seen instances where the compiler tried to emit a byte
size attribute of -1 which ended up being encoded as an unsigned
0xffffffff. Although 0xffffffff is technically a valid size value,
return (char *) (dwarf2_per_objfile->str.buffer + str_offset);
}
+/* Read a string at offset STR_OFFSET in the .debug_str section from
+ the .dwz file DWZ. Throw an error if the offset is too large. If
+ the string consists of a single NUL byte, return NULL; otherwise
+ return a pointer to the string. */
+
+static char *
+read_indirect_string_from_dwz (struct dwz_file *dwz, LONGEST str_offset)
+{
+ dwarf2_read_section (dwarf2_per_objfile->objfile, &dwz->str);
+
+ if (dwz->str.buffer == NULL)
+ error (_("DW_FORM_GNU_strp_alt used without .debug_str "
+ "section [in module %s]"),
+ bfd_get_filename (dwz->dwz_bfd));
+ if (str_offset >= dwz->str.size)
+ error (_("DW_FORM_GNU_strp_alt pointing outside of "
+ ".debug_str section [in module %s]"),
+ bfd_get_filename (dwz->dwz_bfd));
+ gdb_assert (HOST_CHAR_BIT == 8);
+ if (dwz->str.buffer[str_offset] == '\0')
+ return NULL;
+ return (char *) (dwz->str.buffer + str_offset);
+}
+
static char *
read_indirect_string (bfd *abfd, gdb_byte *buf,
const struct comp_unit_head *cu_header,
return result;
}
-/* Return a pointer to just past the end of an LEB128 number in BUF. */
+/* Given index ADDR_INDEX in .debug_addr, fetch the value.
+ ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
+ ADDR_SIZE is the size of addresses from the CU header. */
-static gdb_byte *
-skip_leb128 (bfd *abfd, gdb_byte *buf)
+static CORE_ADDR
+read_addr_index_1 (unsigned int addr_index, ULONGEST addr_base, int addr_size)
+{
+ struct objfile *objfile = dwarf2_per_objfile->objfile;
+ bfd *abfd = objfile->obfd;
+ const gdb_byte *info_ptr;
+
+ dwarf2_read_section (objfile, &dwarf2_per_objfile->addr);
+ if (dwarf2_per_objfile->addr.buffer == NULL)
+ error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
+ objfile->name);
+ if (addr_base + addr_index * addr_size >= dwarf2_per_objfile->addr.size)
+ error (_("DW_FORM_addr_index pointing outside of "
+ ".debug_addr section [in module %s]"),
+ objfile->name);
+ info_ptr = (dwarf2_per_objfile->addr.buffer
+ + addr_base + addr_index * addr_size);
+ if (addr_size == 4)
+ return bfd_get_32 (abfd, info_ptr);
+ else
+ return bfd_get_64 (abfd, info_ptr);
+}
+
+/* Given index ADDR_INDEX in .debug_addr, fetch the value. */
+
+static CORE_ADDR
+read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index)
+{
+ return read_addr_index_1 (addr_index, cu->addr_base, cu->header.addr_size);
+}
+
+/* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
+
+static CORE_ADDR
+read_addr_index_from_leb128 (struct dwarf2_cu *cu, gdb_byte *info_ptr,
+ unsigned int *bytes_read)
+{
+ bfd *abfd = cu->objfile->obfd;
+ unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read);
+
+ return read_addr_index (cu, addr_index);
+}
+
+/* Data structure to pass results from dwarf2_read_addr_index_reader
+ back to dwarf2_read_addr_index. */
+
+struct dwarf2_read_addr_index_data
+{
+ ULONGEST addr_base;
+ int addr_size;
+};
+
+/* die_reader_func for dwarf2_read_addr_index. */
+
+static void
+dwarf2_read_addr_index_reader (const struct die_reader_specs *reader,
+ gdb_byte *info_ptr,
+ struct die_info *comp_unit_die,
+ int has_children,
+ void *data)
+{
+ struct dwarf2_cu *cu = reader->cu;
+ struct dwarf2_read_addr_index_data *aidata =
+ (struct dwarf2_read_addr_index_data *) data;
+
+ aidata->addr_base = cu->addr_base;
+ aidata->addr_size = cu->header.addr_size;
+}
+
+/* Given an index in .debug_addr, fetch the value.
+ NOTE: This can be called during dwarf expression evaluation,
+ long after the debug information has been read, and thus per_cu->cu
+ may no longer exist. */
+
+CORE_ADDR
+dwarf2_read_addr_index (struct dwarf2_per_cu_data *per_cu,
+ unsigned int addr_index)
+{
+ struct objfile *objfile = per_cu->objfile;
+ struct dwarf2_cu *cu = per_cu->cu;
+ ULONGEST addr_base;
+ int addr_size;
+
+ /* This is intended to be called from outside this file. */
+ dw2_setup (objfile);
+
+ /* We need addr_base and addr_size.
+ If we don't have PER_CU->cu, we have to get it.
+ Nasty, but the alternative is storing the needed info in PER_CU,
+ which at this point doesn't seem justified: it's not clear how frequently
+ it would get used and it would increase the size of every PER_CU.
+ Entry points like dwarf2_per_cu_addr_size do a similar thing
+ so we're not in uncharted territory here.
+ Alas we need to be a bit more complicated as addr_base is contained
+ in the DIE.
+
+ We don't need to read the entire CU(/TU).
+ We just need the header and top level die.
+ IWBN to use the aging mechanism to let us lazily later discard the CU.
+ See however init_cutu_and_read_dies_simple. */
+
+ if (cu != NULL)
+ {
+ addr_base = cu->addr_base;
+ addr_size = cu->header.addr_size;
+ }
+ else
+ {
+ struct dwarf2_read_addr_index_data aidata;
+
+ init_cutu_and_read_dies_simple (per_cu, dwarf2_read_addr_index_reader,
+ &aidata);
+ addr_base = aidata.addr_base;
+ addr_size = aidata.addr_size;
+ }
+
+ return read_addr_index_1 (addr_index, addr_base, addr_size);
+}
+
+/* Given a DW_AT_str_index, fetch the string. */
+
+static char *
+read_str_index (const struct die_reader_specs *reader,
+ struct dwarf2_cu *cu, ULONGEST str_index)
+{
+ struct objfile *objfile = dwarf2_per_objfile->objfile;
+ const char *dwo_name = objfile->name;
+ bfd *abfd = objfile->obfd;
+ struct dwo_sections *sections = &reader->dwo_file->sections;
+ gdb_byte *info_ptr;
+ ULONGEST str_offset;
+
+ dwarf2_read_section (objfile, §ions->str);
+ dwarf2_read_section (objfile, §ions->str_offsets);
+ if (sections->str.buffer == NULL)
+ error (_("DW_FORM_str_index used without .debug_str.dwo section"
+ " in CU at offset 0x%lx [in module %s]"),
+ (long) cu->header.offset.sect_off, dwo_name);
+ if (sections->str_offsets.buffer == NULL)
+ error (_("DW_FORM_str_index used without .debug_str_offsets.dwo section"
+ " in CU at offset 0x%lx [in module %s]"),
+ (long) cu->header.offset.sect_off, dwo_name);
+ if (str_index * cu->header.offset_size >= sections->str_offsets.size)
+ error (_("DW_FORM_str_index pointing outside of .debug_str_offsets.dwo"
+ " section in CU at offset 0x%lx [in module %s]"),
+ (long) cu->header.offset.sect_off, dwo_name);
+ info_ptr = (sections->str_offsets.buffer
+ + str_index * cu->header.offset_size);
+ if (cu->header.offset_size == 4)
+ str_offset = bfd_get_32 (abfd, info_ptr);
+ else
+ str_offset = bfd_get_64 (abfd, info_ptr);
+ if (str_offset >= sections->str.size)
+ error (_("Offset from DW_FORM_str_index pointing outside of"
+ " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
+ (long) cu->header.offset.sect_off, dwo_name);
+ return (char *) (sections->str.buffer + str_offset);
+}
+
+/* Return the length of an LEB128 number in BUF. */
+
+static int
+leb128_size (const gdb_byte *buf)
{
- int byte;
+ const gdb_byte *begin = buf;
+ gdb_byte byte;
while (1)
{
- byte = bfd_get_8 (abfd, buf);
- buf++;
+ byte = *buf++;
if ((byte & 128) == 0)
- return buf;
+ return buf - begin;
}
}
back up the chain, and we want to go down. */
static struct attribute *
-dwarf2_attr_no_follow (struct die_info *die, unsigned int name,
- struct dwarf2_cu *cu)
+dwarf2_attr_no_follow (struct die_info *die, unsigned int name)
{
unsigned int i;
fe->symtab = NULL;
}
+/* A convenience function to find the proper .debug_line section for a
+ CU. */
+
+static struct dwarf2_section_info *
+get_debug_line_section (struct dwarf2_cu *cu)
+{
+ struct dwarf2_section_info *section;
+
+ /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
+ DWO file. */
+ if (cu->dwo_unit && cu->per_cu->is_debug_types)
+ section = &cu->dwo_unit->dwo_file->sections.line;
+ else if (cu->per_cu->is_dwz)
+ {
+ struct dwz_file *dwz = dwarf2_get_dwz_file ();
+
+ section = &dwz->line;
+ }
+ else
+ section = &dwarf2_per_objfile->line;
+
+ return section;
+}
+
/* Read the statement program header starting at OFFSET in
- .debug_line, according to the endianness of ABFD. Return a pointer
+ .debug_line, or .debug_line.dwo. Return a pointer
to a struct line_header, allocated using xmalloc.
NOTE: the strings in the include directory and file name tables of
- the returned object point into debug_line_buffer, and must not be
- freed. */
+ the returned object point into the dwarf line section buffer,
+ and must not be freed. */
static struct line_header *
-dwarf_decode_line_header (unsigned int offset, bfd *abfd,
- struct dwarf2_cu *cu)
+dwarf_decode_line_header (unsigned int offset, struct dwarf2_cu *cu)
{
struct cleanup *back_to;
struct line_header *lh;
unsigned int bytes_read, offset_size;
int i;
char *cur_dir, *cur_file;
+ struct dwarf2_section_info *section;
+ bfd *abfd;
- dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->line);
- if (dwarf2_per_objfile->line.buffer == NULL)
+ section = get_debug_line_section (cu);
+ dwarf2_read_section (dwarf2_per_objfile->objfile, section);
+ if (section->buffer == NULL)
{
- complaint (&symfile_complaints, _("missing .debug_line section"));
+ if (cu->dwo_unit && cu->per_cu->is_debug_types)
+ complaint (&symfile_complaints, _("missing .debug_line.dwo section"));
+ else
+ complaint (&symfile_complaints, _("missing .debug_line section"));
return 0;
}
+ /* We can't do this until we know the section is non-empty.
+ Only then do we know we have such a section. */
+ abfd = section->asection->owner;
+
/* Make sure that at least there's room for the total_length field.
That could be 12 bytes long, but we're just going to fudge that. */
- if (offset + 4 >= dwarf2_per_objfile->line.size)
+ if (offset + 4 >= section->size)
{
dwarf2_statement_list_fits_in_line_number_section_complaint ();
return 0;
back_to = make_cleanup ((make_cleanup_ftype *) free_line_header,
(void *) lh);
- line_ptr = dwarf2_per_objfile->line.buffer + offset;
+ line_ptr = section->buffer + offset;
/* Read in the header. */
lh->total_length =
read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header,
&bytes_read, &offset_size);
line_ptr += bytes_read;
- if (line_ptr + lh->total_length > (dwarf2_per_objfile->line.buffer
- + dwarf2_per_objfile->line.size))
+ if (line_ptr + lh->total_length > (section->buffer + section->size))
{
dwarf2_statement_list_fits_in_line_number_section_complaint ();
return 0;
line_ptr += bytes_read;
lh->statement_program_start = line_ptr;
- if (line_ptr > (dwarf2_per_objfile->line.buffer
- + dwarf2_per_objfile->line.size))
+ if (line_ptr > (section->buffer + section->size))
complaint (&symfile_complaints,
_("line number info header doesn't "
"fit in `.debug_line' section"));
GCd by the linker. Ignore it. PR gdb/12528 */
long line_offset
- = line_ptr - dwarf2_per_objfile->line.buffer;
+ = line_ptr - get_debug_line_section (cu)->buffer;
complaint (&symfile_complaints,
_(".debug_line address at offset 0x%lx is 0 "
xfree (fullname);
}
+/* Start a symtab for DWARF.
+ NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
+
+static void
+dwarf2_start_symtab (struct dwarf2_cu *cu,
+ char *name, char *comp_dir, CORE_ADDR low_pc)
+{
+ start_symtab (name, comp_dir, low_pc);
+ record_debugformat ("DWARF 2");
+ record_producer (cu->producer);
+
+ /* We assume that we're processing GCC output. */
+ processing_gcc_compilation = 2;
+
+ processing_has_namespace_info = 0;
+}
+
static void
var_decode_location (struct attribute *attr, struct symbol *sym,
struct dwarf2_cu *cu)
/* Handle one degenerate form of location expression specially, to
preserve GDB's previous behavior when section offsets are
- specified. If this is just a DW_OP_addr then mark this symbol
- as LOC_STATIC. */
+ specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
+ then mark this symbol as LOC_STATIC. */
if (attr_form_is_block (attr)
- && DW_BLOCK (attr)->size == 1 + cu_header->addr_size
- && DW_BLOCK (attr)->data[0] == DW_OP_addr)
+ && ((DW_BLOCK (attr)->data[0] == DW_OP_addr
+ && DW_BLOCK (attr)->size == 1 + cu_header->addr_size)
+ || (DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index
+ && (DW_BLOCK (attr)->size
+ == 1 + leb128_size (&DW_BLOCK (attr)->data[1])))))
{
unsigned int dummy;
- SYMBOL_VALUE_ADDRESS (sym) =
- read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy);
+ if (DW_BLOCK (attr)->data[0] == DW_OP_addr)
+ SYMBOL_VALUE_ADDRESS (sym) =
+ read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy);
+ else
+ SYMBOL_VALUE_ADDRESS (sym) =
+ read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, &dummy);
SYMBOL_CLASS (sym) = LOC_STATIC;
fixup_symbol_section (sym, objfile);
SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets,
switch (attr->form)
{
case DW_FORM_addr:
+ case DW_FORM_GNU_addr_index:
{
gdb_byte *data;
break;
case DW_FORM_string:
case DW_FORM_strp:
+ case DW_FORM_GNU_str_index:
+ case DW_FORM_GNU_strp_alt:
/* DW_STRING is already allocated on the objfile obstack, point
directly to it. */
*bytes = (gdb_byte *) DW_STRING (attr);
/* First see if we have it cached. */
- if (is_ref_attr (attr))
+ if (attr->form == DW_FORM_GNU_ref_alt)
+ {
+ struct dwarf2_per_cu_data *per_cu;
+ sect_offset offset = dwarf2_get_ref_die_offset (attr);
+
+ per_cu = dwarf2_find_containing_comp_unit (offset, 1, cu->objfile);
+ this_type = get_die_type_at_offset (offset, per_cu);
+ }
+ else if (is_ref_attr (attr))
{
sect_offset offset = dwarf2_get_ref_die_offset (attr);
else if (attr->form == DW_FORM_ref_sig8)
{
struct signatured_type *sig_type = DW_SIGNATURED_TYPE (attr);
- sect_offset offset;
/* sig_type will be NULL if the signatured type is missing from
the debug info. */
"at 0x%x [in module %s]"),
die->offset.sect_off, objfile->name);
- gdb_assert (sig_type->per_cu.debug_types_section);
- offset.sect_off = (sig_type->per_cu.offset.sect_off
- + sig_type->type_offset.cu_off);
- this_type = get_die_type_at_offset (offset, &sig_type->per_cu);
+ gdb_assert (sig_type->per_cu.is_debug_types);
+ /* If we haven't filled in type_offset_in_section yet, then we
+ haven't read the type in yet. */
+ this_type = NULL;
+ if (sig_type->type_offset_in_section.sect_off != 0)
+ {
+ this_type =
+ get_die_type_at_offset (sig_type->type_offset_in_section,
+ &sig_type->per_cu);
+ }
}
else
{
struct dwarf2_cu *type_cu = cu;
type_die = follow_die_ref_or_sig (die, attr, &type_cu);
- /* If the type is cached, we should have found it above. */
- gdb_assert (get_die_type (type_die, type_cu) == NULL);
- this_type = read_type_die_1 (type_die, type_cu);
+ /* If we found the type now, it's probably because the type came
+ from an inter-CU reference and the type's CU got expanded before
+ ours. */
+ this_type = get_die_type (type_die, type_cu);
+ if (this_type == NULL)
+ this_type = read_type_die_1 (type_die, type_cu);
}
/* If we still don't have a type use an error marker. */
So it does not need a prefix. */
return "";
case DW_TAG_compile_unit:
+ case DW_TAG_partial_unit:
/* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
if (cu->language == language_cplus
&& !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types)
switch (die->tag)
{
case DW_TAG_compile_unit:
+ case DW_TAG_partial_unit:
/* Compilation units have a DW_AT_name that is a filename, not
a source language identifier. */
case DW_TAG_enumeration_type:
if (die->tag == DW_TAG_class_type)
return dwarf2_name (die, cu);
}
- while (die->tag != DW_TAG_compile_unit);
+ while (die->tag != DW_TAG_compile_unit
+ && die->tag != DW_TAG_partial_unit);
}
break;
{
struct attribute *attr;
- attr = dwarf2_attr (die, DW_AT_extension, *ext_cu);
- if (attr == NULL)
- return NULL;
-
- return follow_die_ref (die, attr, ext_cu);
-}
-
-/* Convert a DIE tag into its string name. */
-
-static char *
-dwarf_tag_name (unsigned tag)
-{
- switch (tag)
- {
- case DW_TAG_padding:
- return "DW_TAG_padding";
- case DW_TAG_array_type:
- return "DW_TAG_array_type";
- case DW_TAG_class_type:
- return "DW_TAG_class_type";
- case DW_TAG_entry_point:
- return "DW_TAG_entry_point";
- case DW_TAG_enumeration_type:
- return "DW_TAG_enumeration_type";
- case DW_TAG_formal_parameter:
- return "DW_TAG_formal_parameter";
- case DW_TAG_imported_declaration:
- return "DW_TAG_imported_declaration";
- case DW_TAG_label:
- return "DW_TAG_label";
- case DW_TAG_lexical_block:
- return "DW_TAG_lexical_block";
- case DW_TAG_member:
- return "DW_TAG_member";
- case DW_TAG_pointer_type:
- return "DW_TAG_pointer_type";
- case DW_TAG_reference_type:
- return "DW_TAG_reference_type";
- case DW_TAG_compile_unit:
- return "DW_TAG_compile_unit";
- case DW_TAG_string_type:
- return "DW_TAG_string_type";
- case DW_TAG_structure_type:
- return "DW_TAG_structure_type";
- case DW_TAG_subroutine_type:
- return "DW_TAG_subroutine_type";
- case DW_TAG_typedef:
- return "DW_TAG_typedef";
- case DW_TAG_union_type:
- return "DW_TAG_union_type";
- case DW_TAG_unspecified_parameters:
- return "DW_TAG_unspecified_parameters";
- case DW_TAG_variant:
- return "DW_TAG_variant";
- case DW_TAG_common_block:
- return "DW_TAG_common_block";
- case DW_TAG_common_inclusion:
- return "DW_TAG_common_inclusion";
- case DW_TAG_inheritance:
- return "DW_TAG_inheritance";
- case DW_TAG_inlined_subroutine:
- return "DW_TAG_inlined_subroutine";
- case DW_TAG_module:
- return "DW_TAG_module";
- case DW_TAG_ptr_to_member_type:
- return "DW_TAG_ptr_to_member_type";
- case DW_TAG_set_type:
- return "DW_TAG_set_type";
- case DW_TAG_subrange_type:
- return "DW_TAG_subrange_type";
- case DW_TAG_with_stmt:
- return "DW_TAG_with_stmt";
- case DW_TAG_access_declaration:
- return "DW_TAG_access_declaration";
- case DW_TAG_base_type:
- return "DW_TAG_base_type";
- case DW_TAG_catch_block:
- return "DW_TAG_catch_block";
- case DW_TAG_const_type:
- return "DW_TAG_const_type";
- case DW_TAG_constant:
- return "DW_TAG_constant";
- case DW_TAG_enumerator:
- return "DW_TAG_enumerator";
- case DW_TAG_file_type:
- return "DW_TAG_file_type";
- case DW_TAG_friend:
- return "DW_TAG_friend";
- case DW_TAG_namelist:
- return "DW_TAG_namelist";
- case DW_TAG_namelist_item:
- return "DW_TAG_namelist_item";
- case DW_TAG_packed_type:
- return "DW_TAG_packed_type";
- case DW_TAG_subprogram:
- return "DW_TAG_subprogram";
- case DW_TAG_template_type_param:
- return "DW_TAG_template_type_param";
- case DW_TAG_template_value_param:
- return "DW_TAG_template_value_param";
- case DW_TAG_thrown_type:
- return "DW_TAG_thrown_type";
- case DW_TAG_try_block:
- return "DW_TAG_try_block";
- case DW_TAG_variant_part:
- return "DW_TAG_variant_part";
- case DW_TAG_variable:
- return "DW_TAG_variable";
- case DW_TAG_volatile_type:
- return "DW_TAG_volatile_type";
- case DW_TAG_dwarf_procedure:
- return "DW_TAG_dwarf_procedure";
- case DW_TAG_restrict_type:
- return "DW_TAG_restrict_type";
- case DW_TAG_interface_type:
- return "DW_TAG_interface_type";
- case DW_TAG_namespace:
- return "DW_TAG_namespace";
- case DW_TAG_imported_module:
- return "DW_TAG_imported_module";
- case DW_TAG_unspecified_type:
- return "DW_TAG_unspecified_type";
- case DW_TAG_partial_unit:
- return "DW_TAG_partial_unit";
- case DW_TAG_imported_unit:
- return "DW_TAG_imported_unit";
- case DW_TAG_condition:
- return "DW_TAG_condition";
- case DW_TAG_shared_type:
- return "DW_TAG_shared_type";
- case DW_TAG_type_unit:
- return "DW_TAG_type_unit";
- case DW_TAG_MIPS_loop:
- return "DW_TAG_MIPS_loop";
- case DW_TAG_HP_array_descriptor:
- return "DW_TAG_HP_array_descriptor";
- case DW_TAG_format_label:
- return "DW_TAG_format_label";
- case DW_TAG_function_template:
- return "DW_TAG_function_template";
- case DW_TAG_class_template:
- return "DW_TAG_class_template";
- case DW_TAG_GNU_BINCL:
- return "DW_TAG_GNU_BINCL";
- case DW_TAG_GNU_EINCL:
- return "DW_TAG_GNU_EINCL";
- case DW_TAG_upc_shared_type:
- return "DW_TAG_upc_shared_type";
- case DW_TAG_upc_strict_type:
- return "DW_TAG_upc_strict_type";
- case DW_TAG_upc_relaxed_type:
- return "DW_TAG_upc_relaxed_type";
- case DW_TAG_PGI_kanji_type:
- return "DW_TAG_PGI_kanji_type";
- case DW_TAG_PGI_interface_block:
- return "DW_TAG_PGI_interface_block";
- case DW_TAG_GNU_call_site:
- return "DW_TAG_GNU_call_site";
- default:
- return "DW_TAG_<unknown>";
- }
+ attr = dwarf2_attr (die, DW_AT_extension, *ext_cu);
+ if (attr == NULL)
+ return NULL;
+
+ return follow_die_ref (die, attr, ext_cu);
+}
+
+/* Convert a DIE tag into its string name. */
+
+static const char *
+dwarf_tag_name (unsigned tag)
+{
+ const char *name = get_DW_TAG_name (tag);
+
+ if (name == NULL)
+ return "DW_TAG_<unknown>";
+
+ return name;
}
/* Convert a DWARF attribute code into its string name. */
-static char *
+static const char *
dwarf_attr_name (unsigned attr)
{
- switch (attr)
- {
- case DW_AT_sibling:
- return "DW_AT_sibling";
- case DW_AT_location:
- return "DW_AT_location";
- case DW_AT_name:
- return "DW_AT_name";
- case DW_AT_ordering:
- return "DW_AT_ordering";
- case DW_AT_subscr_data:
- return "DW_AT_subscr_data";
- case DW_AT_byte_size:
- return "DW_AT_byte_size";
- case DW_AT_bit_offset:
- return "DW_AT_bit_offset";
- case DW_AT_bit_size:
- return "DW_AT_bit_size";
- case DW_AT_element_list:
- return "DW_AT_element_list";
- case DW_AT_stmt_list:
- return "DW_AT_stmt_list";
- case DW_AT_low_pc:
- return "DW_AT_low_pc";
- case DW_AT_high_pc:
- return "DW_AT_high_pc";
- case DW_AT_language:
- return "DW_AT_language";
- case DW_AT_member:
- return "DW_AT_member";
- case DW_AT_discr:
- return "DW_AT_discr";
- case DW_AT_discr_value:
- return "DW_AT_discr_value";
- case DW_AT_visibility:
- return "DW_AT_visibility";
- case DW_AT_import:
- return "DW_AT_import";
- case DW_AT_string_length:
- return "DW_AT_string_length";
- case DW_AT_common_reference:
- return "DW_AT_common_reference";
- case DW_AT_comp_dir:
- return "DW_AT_comp_dir";
- case DW_AT_const_value:
- return "DW_AT_const_value";
- case DW_AT_containing_type:
- return "DW_AT_containing_type";
- case DW_AT_default_value:
- return "DW_AT_default_value";
- case DW_AT_inline:
- return "DW_AT_inline";
- case DW_AT_is_optional:
- return "DW_AT_is_optional";
- case DW_AT_lower_bound:
- return "DW_AT_lower_bound";
- case DW_AT_producer:
- return "DW_AT_producer";
- case DW_AT_prototyped:
- return "DW_AT_prototyped";
- case DW_AT_return_addr:
- return "DW_AT_return_addr";
- case DW_AT_start_scope:
- return "DW_AT_start_scope";
- case DW_AT_bit_stride:
- return "DW_AT_bit_stride";
- case DW_AT_upper_bound:
- return "DW_AT_upper_bound";
- case DW_AT_abstract_origin:
- return "DW_AT_abstract_origin";
- case DW_AT_accessibility:
- return "DW_AT_accessibility";
- case DW_AT_address_class:
- return "DW_AT_address_class";
- case DW_AT_artificial:
- return "DW_AT_artificial";
- case DW_AT_base_types:
- return "DW_AT_base_types";
- case DW_AT_calling_convention:
- return "DW_AT_calling_convention";
- case DW_AT_count:
- return "DW_AT_count";
- case DW_AT_data_member_location:
- return "DW_AT_data_member_location";
- case DW_AT_decl_column:
- return "DW_AT_decl_column";
- case DW_AT_decl_file:
- return "DW_AT_decl_file";
- case DW_AT_decl_line:
- return "DW_AT_decl_line";
- case DW_AT_declaration:
- return "DW_AT_declaration";
- case DW_AT_discr_list:
- return "DW_AT_discr_list";
- case DW_AT_encoding:
- return "DW_AT_encoding";
- case DW_AT_external:
- return "DW_AT_external";
- case DW_AT_frame_base:
- return "DW_AT_frame_base";
- case DW_AT_friend:
- return "DW_AT_friend";
- case DW_AT_identifier_case:
- return "DW_AT_identifier_case";
- case DW_AT_macro_info:
- return "DW_AT_macro_info";
- case DW_AT_namelist_items:
- return "DW_AT_namelist_items";
- case DW_AT_priority:
- return "DW_AT_priority";
- case DW_AT_segment:
- return "DW_AT_segment";
- case DW_AT_specification:
- return "DW_AT_specification";
- case DW_AT_static_link:
- return "DW_AT_static_link";
- case DW_AT_type:
- return "DW_AT_type";
- case DW_AT_use_location:
- return "DW_AT_use_location";
- case DW_AT_variable_parameter:
- return "DW_AT_variable_parameter";
- case DW_AT_virtuality:
- return "DW_AT_virtuality";
- case DW_AT_vtable_elem_location:
- return "DW_AT_vtable_elem_location";
- /* DWARF 3 values. */
- case DW_AT_allocated:
- return "DW_AT_allocated";
- case DW_AT_associated:
- return "DW_AT_associated";
- case DW_AT_data_location:
- return "DW_AT_data_location";
- case DW_AT_byte_stride:
- return "DW_AT_byte_stride";
- case DW_AT_entry_pc:
- return "DW_AT_entry_pc";
- case DW_AT_use_UTF8:
- return "DW_AT_use_UTF8";
- case DW_AT_extension:
- return "DW_AT_extension";
- case DW_AT_ranges:
- return "DW_AT_ranges";
- case DW_AT_trampoline:
- return "DW_AT_trampoline";
- case DW_AT_call_column:
- return "DW_AT_call_column";
- case DW_AT_call_file:
- return "DW_AT_call_file";
- case DW_AT_call_line:
- return "DW_AT_call_line";
- case DW_AT_description:
- return "DW_AT_description";
- case DW_AT_binary_scale:
- return "DW_AT_binary_scale";
- case DW_AT_decimal_scale:
- return "DW_AT_decimal_scale";
- case DW_AT_small:
- return "DW_AT_small";
- case DW_AT_decimal_sign:
- return "DW_AT_decimal_sign";
- case DW_AT_digit_count:
- return "DW_AT_digit_count";
- case DW_AT_picture_string:
- return "DW_AT_picture_string";
- case DW_AT_mutable:
- return "DW_AT_mutable";
- case DW_AT_threads_scaled:
- return "DW_AT_threads_scaled";
- case DW_AT_explicit:
- return "DW_AT_explicit";
- case DW_AT_object_pointer:
- return "DW_AT_object_pointer";
- case DW_AT_endianity:
- return "DW_AT_endianity";
- case DW_AT_elemental:
- return "DW_AT_elemental";
- case DW_AT_pure:
- return "DW_AT_pure";
- case DW_AT_recursive:
- return "DW_AT_recursive";
- /* DWARF 4 values. */
- case DW_AT_signature:
- return "DW_AT_signature";
- case DW_AT_linkage_name:
- return "DW_AT_linkage_name";
- /* SGI/MIPS extensions. */
+ const char *name;
+
#ifdef MIPS /* collides with DW_AT_HP_block_index */
- case DW_AT_MIPS_fde:
- return "DW_AT_MIPS_fde";
-#endif
- case DW_AT_MIPS_loop_begin:
- return "DW_AT_MIPS_loop_begin";
- case DW_AT_MIPS_tail_loop_begin:
- return "DW_AT_MIPS_tail_loop_begin";
- case DW_AT_MIPS_epilog_begin:
- return "DW_AT_MIPS_epilog_begin";
- case DW_AT_MIPS_loop_unroll_factor:
- return "DW_AT_MIPS_loop_unroll_factor";
- case DW_AT_MIPS_software_pipeline_depth:
- return "DW_AT_MIPS_software_pipeline_depth";
- case DW_AT_MIPS_linkage_name:
- return "DW_AT_MIPS_linkage_name";
- case DW_AT_MIPS_stride:
- return "DW_AT_MIPS_stride";
- case DW_AT_MIPS_abstract_name:
- return "DW_AT_MIPS_abstract_name";
- case DW_AT_MIPS_clone_origin:
- return "DW_AT_MIPS_clone_origin";
- case DW_AT_MIPS_has_inlines:
- return "DW_AT_MIPS_has_inlines";
- /* HP extensions. */
-#ifndef MIPS /* collides with DW_AT_MIPS_fde */
- case DW_AT_HP_block_index:
- return "DW_AT_HP_block_index";
+ if (attr == DW_AT_MIPS_fde)
+ return "DW_AT_MIPS_fde";
+#else
+ if (attr == DW_AT_HP_block_index)
+ return "DW_AT_HP_block_index";
#endif
- case DW_AT_HP_unmodifiable:
- return "DW_AT_HP_unmodifiable";
- case DW_AT_HP_actuals_stmt_list:
- return "DW_AT_HP_actuals_stmt_list";
- case DW_AT_HP_proc_per_section:
- return "DW_AT_HP_proc_per_section";
- case DW_AT_HP_raw_data_ptr:
- return "DW_AT_HP_raw_data_ptr";
- case DW_AT_HP_pass_by_reference:
- return "DW_AT_HP_pass_by_reference";
- case DW_AT_HP_opt_level:
- return "DW_AT_HP_opt_level";
- case DW_AT_HP_prof_version_id:
- return "DW_AT_HP_prof_version_id";
- case DW_AT_HP_opt_flags:
- return "DW_AT_HP_opt_flags";
- case DW_AT_HP_cold_region_low_pc:
- return "DW_AT_HP_cold_region_low_pc";
- case DW_AT_HP_cold_region_high_pc:
- return "DW_AT_HP_cold_region_high_pc";
- case DW_AT_HP_all_variables_modifiable:
- return "DW_AT_HP_all_variables_modifiable";
- case DW_AT_HP_linkage_name:
- return "DW_AT_HP_linkage_name";
- case DW_AT_HP_prof_flags:
- return "DW_AT_HP_prof_flags";
- /* GNU extensions. */
- case DW_AT_sf_names:
- return "DW_AT_sf_names";
- case DW_AT_src_info:
- return "DW_AT_src_info";
- case DW_AT_mac_info:
- return "DW_AT_mac_info";
- case DW_AT_src_coords:
- return "DW_AT_src_coords";
- case DW_AT_body_begin:
- return "DW_AT_body_begin";
- case DW_AT_body_end:
- return "DW_AT_body_end";
- case DW_AT_GNU_vector:
- return "DW_AT_GNU_vector";
- case DW_AT_GNU_odr_signature:
- return "DW_AT_GNU_odr_signature";
- /* VMS extensions. */
- case DW_AT_VMS_rtnbeg_pd_address:
- return "DW_AT_VMS_rtnbeg_pd_address";
- /* UPC extension. */
- case DW_AT_upc_threads_scaled:
- return "DW_AT_upc_threads_scaled";
- /* PGI (STMicroelectronics) extensions. */
- case DW_AT_PGI_lbase:
- return "DW_AT_PGI_lbase";
- case DW_AT_PGI_soffset:
- return "DW_AT_PGI_soffset";
- case DW_AT_PGI_lstride:
- return "DW_AT_PGI_lstride";
- default:
- return "DW_AT_<unknown>";
- }
+
+ name = get_DW_AT_name (attr);
+
+ if (name == NULL)
+ return "DW_AT_<unknown>";
+
+ return name;
}
/* Convert a DWARF value form code into its string name. */
-static char *
+static const char *
dwarf_form_name (unsigned form)
{
- switch (form)
- {
- case DW_FORM_addr:
- return "DW_FORM_addr";
- case DW_FORM_block2:
- return "DW_FORM_block2";
- case DW_FORM_block4:
- return "DW_FORM_block4";
- case DW_FORM_data2:
- return "DW_FORM_data2";
- case DW_FORM_data4:
- return "DW_FORM_data4";
- case DW_FORM_data8:
- return "DW_FORM_data8";
- case DW_FORM_string:
- return "DW_FORM_string";
- case DW_FORM_block:
- return "DW_FORM_block";
- case DW_FORM_block1:
- return "DW_FORM_block1";
- case DW_FORM_data1:
- return "DW_FORM_data1";
- case DW_FORM_flag:
- return "DW_FORM_flag";
- case DW_FORM_sdata:
- return "DW_FORM_sdata";
- case DW_FORM_strp:
- return "DW_FORM_strp";
- case DW_FORM_udata:
- return "DW_FORM_udata";
- case DW_FORM_ref_addr:
- return "DW_FORM_ref_addr";
- case DW_FORM_ref1:
- return "DW_FORM_ref1";
- case DW_FORM_ref2:
- return "DW_FORM_ref2";
- case DW_FORM_ref4:
- return "DW_FORM_ref4";
- case DW_FORM_ref8:
- return "DW_FORM_ref8";
- case DW_FORM_ref_udata:
- return "DW_FORM_ref_udata";
- case DW_FORM_indirect:
- return "DW_FORM_indirect";
- case DW_FORM_sec_offset:
- return "DW_FORM_sec_offset";
- case DW_FORM_exprloc:
- return "DW_FORM_exprloc";
- case DW_FORM_flag_present:
- return "DW_FORM_flag_present";
- case DW_FORM_ref_sig8:
- return "DW_FORM_ref_sig8";
- default:
- return "DW_FORM_<unknown>";
- }
-}
-
-/* Convert a DWARF stack opcode into its string name. */
-
-const char *
-dwarf_stack_op_name (unsigned op)
-{
- switch (op)
- {
- case DW_OP_addr:
- return "DW_OP_addr";
- case DW_OP_deref:
- return "DW_OP_deref";
- case DW_OP_const1u:
- return "DW_OP_const1u";
- case DW_OP_const1s:
- return "DW_OP_const1s";
- case DW_OP_const2u:
- return "DW_OP_const2u";
- case DW_OP_const2s:
- return "DW_OP_const2s";
- case DW_OP_const4u:
- return "DW_OP_const4u";
- case DW_OP_const4s:
- return "DW_OP_const4s";
- case DW_OP_const8u:
- return "DW_OP_const8u";
- case DW_OP_const8s:
- return "DW_OP_const8s";
- case DW_OP_constu:
- return "DW_OP_constu";
- case DW_OP_consts:
- return "DW_OP_consts";
- case DW_OP_dup:
- return "DW_OP_dup";
- case DW_OP_drop:
- return "DW_OP_drop";
- case DW_OP_over:
- return "DW_OP_over";
- case DW_OP_pick:
- return "DW_OP_pick";
- case DW_OP_swap:
- return "DW_OP_swap";
- case DW_OP_rot:
- return "DW_OP_rot";
- case DW_OP_xderef:
- return "DW_OP_xderef";
- case DW_OP_abs:
- return "DW_OP_abs";
- case DW_OP_and:
- return "DW_OP_and";
- case DW_OP_div:
- return "DW_OP_div";
- case DW_OP_minus:
- return "DW_OP_minus";
- case DW_OP_mod:
- return "DW_OP_mod";
- case DW_OP_mul:
- return "DW_OP_mul";
- case DW_OP_neg:
- return "DW_OP_neg";
- case DW_OP_not:
- return "DW_OP_not";
- case DW_OP_or:
- return "DW_OP_or";
- case DW_OP_plus:
- return "DW_OP_plus";
- case DW_OP_plus_uconst:
- return "DW_OP_plus_uconst";
- case DW_OP_shl:
- return "DW_OP_shl";
- case DW_OP_shr:
- return "DW_OP_shr";
- case DW_OP_shra:
- return "DW_OP_shra";
- case DW_OP_xor:
- return "DW_OP_xor";
- case DW_OP_bra:
- return "DW_OP_bra";
- case DW_OP_eq:
- return "DW_OP_eq";
- case DW_OP_ge:
- return "DW_OP_ge";
- case DW_OP_gt:
- return "DW_OP_gt";
- case DW_OP_le:
- return "DW_OP_le";
- case DW_OP_lt:
- return "DW_OP_lt";
- case DW_OP_ne:
- return "DW_OP_ne";
- case DW_OP_skip:
- return "DW_OP_skip";
- case DW_OP_lit0:
- return "DW_OP_lit0";
- case DW_OP_lit1:
- return "DW_OP_lit1";
- case DW_OP_lit2:
- return "DW_OP_lit2";
- case DW_OP_lit3:
- return "DW_OP_lit3";
- case DW_OP_lit4:
- return "DW_OP_lit4";
- case DW_OP_lit5:
- return "DW_OP_lit5";
- case DW_OP_lit6:
- return "DW_OP_lit6";
- case DW_OP_lit7:
- return "DW_OP_lit7";
- case DW_OP_lit8:
- return "DW_OP_lit8";
- case DW_OP_lit9:
- return "DW_OP_lit9";
- case DW_OP_lit10:
- return "DW_OP_lit10";
- case DW_OP_lit11:
- return "DW_OP_lit11";
- case DW_OP_lit12:
- return "DW_OP_lit12";
- case DW_OP_lit13:
- return "DW_OP_lit13";
- case DW_OP_lit14:
- return "DW_OP_lit14";
- case DW_OP_lit15:
- return "DW_OP_lit15";
- case DW_OP_lit16:
- return "DW_OP_lit16";
- case DW_OP_lit17:
- return "DW_OP_lit17";
- case DW_OP_lit18:
- return "DW_OP_lit18";
- case DW_OP_lit19:
- return "DW_OP_lit19";
- case DW_OP_lit20:
- return "DW_OP_lit20";
- case DW_OP_lit21:
- return "DW_OP_lit21";
- case DW_OP_lit22:
- return "DW_OP_lit22";
- case DW_OP_lit23:
- return "DW_OP_lit23";
- case DW_OP_lit24:
- return "DW_OP_lit24";
- case DW_OP_lit25:
- return "DW_OP_lit25";
- case DW_OP_lit26:
- return "DW_OP_lit26";
- case DW_OP_lit27:
- return "DW_OP_lit27";
- case DW_OP_lit28:
- return "DW_OP_lit28";
- case DW_OP_lit29:
- return "DW_OP_lit29";
- case DW_OP_lit30:
- return "DW_OP_lit30";
- case DW_OP_lit31:
- return "DW_OP_lit31";
- case DW_OP_reg0:
- return "DW_OP_reg0";
- case DW_OP_reg1:
- return "DW_OP_reg1";
- case DW_OP_reg2:
- return "DW_OP_reg2";
- case DW_OP_reg3:
- return "DW_OP_reg3";
- case DW_OP_reg4:
- return "DW_OP_reg4";
- case DW_OP_reg5:
- return "DW_OP_reg5";
- case DW_OP_reg6:
- return "DW_OP_reg6";
- case DW_OP_reg7:
- return "DW_OP_reg7";
- case DW_OP_reg8:
- return "DW_OP_reg8";
- case DW_OP_reg9:
- return "DW_OP_reg9";
- case DW_OP_reg10:
- return "DW_OP_reg10";
- case DW_OP_reg11:
- return "DW_OP_reg11";
- case DW_OP_reg12:
- return "DW_OP_reg12";
- case DW_OP_reg13:
- return "DW_OP_reg13";
- case DW_OP_reg14:
- return "DW_OP_reg14";
- case DW_OP_reg15:
- return "DW_OP_reg15";
- case DW_OP_reg16:
- return "DW_OP_reg16";
- case DW_OP_reg17:
- return "DW_OP_reg17";
- case DW_OP_reg18:
- return "DW_OP_reg18";
- case DW_OP_reg19:
- return "DW_OP_reg19";
- case DW_OP_reg20:
- return "DW_OP_reg20";
- case DW_OP_reg21:
- return "DW_OP_reg21";
- case DW_OP_reg22:
- return "DW_OP_reg22";
- case DW_OP_reg23:
- return "DW_OP_reg23";
- case DW_OP_reg24:
- return "DW_OP_reg24";
- case DW_OP_reg25:
- return "DW_OP_reg25";
- case DW_OP_reg26:
- return "DW_OP_reg26";
- case DW_OP_reg27:
- return "DW_OP_reg27";
- case DW_OP_reg28:
- return "DW_OP_reg28";
- case DW_OP_reg29:
- return "DW_OP_reg29";
- case DW_OP_reg30:
- return "DW_OP_reg30";
- case DW_OP_reg31:
- return "DW_OP_reg31";
- case DW_OP_breg0:
- return "DW_OP_breg0";
- case DW_OP_breg1:
- return "DW_OP_breg1";
- case DW_OP_breg2:
- return "DW_OP_breg2";
- case DW_OP_breg3:
- return "DW_OP_breg3";
- case DW_OP_breg4:
- return "DW_OP_breg4";
- case DW_OP_breg5:
- return "DW_OP_breg5";
- case DW_OP_breg6:
- return "DW_OP_breg6";
- case DW_OP_breg7:
- return "DW_OP_breg7";
- case DW_OP_breg8:
- return "DW_OP_breg8";
- case DW_OP_breg9:
- return "DW_OP_breg9";
- case DW_OP_breg10:
- return "DW_OP_breg10";
- case DW_OP_breg11:
- return "DW_OP_breg11";
- case DW_OP_breg12:
- return "DW_OP_breg12";
- case DW_OP_breg13:
- return "DW_OP_breg13";
- case DW_OP_breg14:
- return "DW_OP_breg14";
- case DW_OP_breg15:
- return "DW_OP_breg15";
- case DW_OP_breg16:
- return "DW_OP_breg16";
- case DW_OP_breg17:
- return "DW_OP_breg17";
- case DW_OP_breg18:
- return "DW_OP_breg18";
- case DW_OP_breg19:
- return "DW_OP_breg19";
- case DW_OP_breg20:
- return "DW_OP_breg20";
- case DW_OP_breg21:
- return "DW_OP_breg21";
- case DW_OP_breg22:
- return "DW_OP_breg22";
- case DW_OP_breg23:
- return "DW_OP_breg23";
- case DW_OP_breg24:
- return "DW_OP_breg24";
- case DW_OP_breg25:
- return "DW_OP_breg25";
- case DW_OP_breg26:
- return "DW_OP_breg26";
- case DW_OP_breg27:
- return "DW_OP_breg27";
- case DW_OP_breg28:
- return "DW_OP_breg28";
- case DW_OP_breg29:
- return "DW_OP_breg29";
- case DW_OP_breg30:
- return "DW_OP_breg30";
- case DW_OP_breg31:
- return "DW_OP_breg31";
- case DW_OP_regx:
- return "DW_OP_regx";
- case DW_OP_fbreg:
- return "DW_OP_fbreg";
- case DW_OP_bregx:
- return "DW_OP_bregx";
- case DW_OP_piece:
- return "DW_OP_piece";
- case DW_OP_deref_size:
- return "DW_OP_deref_size";
- case DW_OP_xderef_size:
- return "DW_OP_xderef_size";
- case DW_OP_nop:
- return "DW_OP_nop";
- /* DWARF 3 extensions. */
- case DW_OP_push_object_address:
- return "DW_OP_push_object_address";
- case DW_OP_call2:
- return "DW_OP_call2";
- case DW_OP_call4:
- return "DW_OP_call4";
- case DW_OP_call_ref:
- return "DW_OP_call_ref";
- case DW_OP_form_tls_address:
- return "DW_OP_form_tls_address";
- case DW_OP_call_frame_cfa:
- return "DW_OP_call_frame_cfa";
- case DW_OP_bit_piece:
- return "DW_OP_bit_piece";
- /* DWARF 4 extensions. */
- case DW_OP_implicit_value:
- return "DW_OP_implicit_value";
- case DW_OP_stack_value:
- return "DW_OP_stack_value";
- /* GNU extensions. */
- case DW_OP_GNU_push_tls_address:
- return "DW_OP_GNU_push_tls_address";
- case DW_OP_GNU_uninit:
- return "DW_OP_GNU_uninit";
- case DW_OP_GNU_encoded_addr:
- return "DW_OP_GNU_encoded_addr";
- case DW_OP_GNU_implicit_pointer:
- return "DW_OP_GNU_implicit_pointer";
- case DW_OP_GNU_entry_value:
- return "DW_OP_GNU_entry_value";
- case DW_OP_GNU_const_type:
- return "DW_OP_GNU_const_type";
- case DW_OP_GNU_regval_type:
- return "DW_OP_GNU_regval_type";
- case DW_OP_GNU_deref_type:
- return "DW_OP_GNU_deref_type";
- case DW_OP_GNU_convert:
- return "DW_OP_GNU_convert";
- case DW_OP_GNU_reinterpret:
- return "DW_OP_GNU_reinterpret";
- case DW_OP_GNU_parameter_ref:
- return "DW_OP_GNU_parameter_ref";
- default:
- return NULL;
- }
+ const char *name = get_DW_FORM_name (form);
+
+ if (name == NULL)
+ return "DW_FORM_<unknown>";
+
+ return name;
}
static char *
/* Convert a DWARF type code into its string name. */
-static char *
+static const char *
dwarf_type_encoding_name (unsigned enc)
{
- switch (enc)
- {
- case DW_ATE_void:
- return "DW_ATE_void";
- case DW_ATE_address:
- return "DW_ATE_address";
- case DW_ATE_boolean:
- return "DW_ATE_boolean";
- case DW_ATE_complex_float:
- return "DW_ATE_complex_float";
- case DW_ATE_float:
- return "DW_ATE_float";
- case DW_ATE_signed:
- return "DW_ATE_signed";
- case DW_ATE_signed_char:
- return "DW_ATE_signed_char";
- case DW_ATE_unsigned:
- return "DW_ATE_unsigned";
- case DW_ATE_unsigned_char:
- return "DW_ATE_unsigned_char";
- /* DWARF 3. */
- case DW_ATE_imaginary_float:
- return "DW_ATE_imaginary_float";
- case DW_ATE_packed_decimal:
- return "DW_ATE_packed_decimal";
- case DW_ATE_numeric_string:
- return "DW_ATE_numeric_string";
- case DW_ATE_edited:
- return "DW_ATE_edited";
- case DW_ATE_signed_fixed:
- return "DW_ATE_signed_fixed";
- case DW_ATE_unsigned_fixed:
- return "DW_ATE_unsigned_fixed";
- case DW_ATE_decimal_float:
- return "DW_ATE_decimal_float";
- /* DWARF 4. */
- case DW_ATE_UTF:
- return "DW_ATE_UTF";
- /* HP extensions. */
- case DW_ATE_HP_float80:
- return "DW_ATE_HP_float80";
- case DW_ATE_HP_complex_float80:
- return "DW_ATE_HP_complex_float80";
- case DW_ATE_HP_float128:
- return "DW_ATE_HP_float128";
- case DW_ATE_HP_complex_float128:
- return "DW_ATE_HP_complex_float128";
- case DW_ATE_HP_floathpintel:
- return "DW_ATE_HP_floathpintel";
- case DW_ATE_HP_imaginary_float80:
- return "DW_ATE_HP_imaginary_float80";
- case DW_ATE_HP_imaginary_float128:
- return "DW_ATE_HP_imaginary_float128";
- default:
- return "DW_ATE_<unknown>";
- }
-}
+ const char *name = get_DW_ATE_name (enc);
-/* Convert a DWARF call frame info operation to its string name. */
+ if (name == NULL)
+ return "DW_ATE_<unknown>";
-#if 0
-static char *
-dwarf_cfi_name (unsigned cfi_opc)
-{
- switch (cfi_opc)
- {
- case DW_CFA_advance_loc:
- return "DW_CFA_advance_loc";
- case DW_CFA_offset:
- return "DW_CFA_offset";
- case DW_CFA_restore:
- return "DW_CFA_restore";
- case DW_CFA_nop:
- return "DW_CFA_nop";
- case DW_CFA_set_loc:
- return "DW_CFA_set_loc";
- case DW_CFA_advance_loc1:
- return "DW_CFA_advance_loc1";
- case DW_CFA_advance_loc2:
- return "DW_CFA_advance_loc2";
- case DW_CFA_advance_loc4:
- return "DW_CFA_advance_loc4";
- case DW_CFA_offset_extended:
- return "DW_CFA_offset_extended";
- case DW_CFA_restore_extended:
- return "DW_CFA_restore_extended";
- case DW_CFA_undefined:
- return "DW_CFA_undefined";
- case DW_CFA_same_value:
- return "DW_CFA_same_value";
- case DW_CFA_register:
- return "DW_CFA_register";
- case DW_CFA_remember_state:
- return "DW_CFA_remember_state";
- case DW_CFA_restore_state:
- return "DW_CFA_restore_state";
- case DW_CFA_def_cfa:
- return "DW_CFA_def_cfa";
- case DW_CFA_def_cfa_register:
- return "DW_CFA_def_cfa_register";
- case DW_CFA_def_cfa_offset:
- return "DW_CFA_def_cfa_offset";
- /* DWARF 3. */
- case DW_CFA_def_cfa_expression:
- return "DW_CFA_def_cfa_expression";
- case DW_CFA_expression:
- return "DW_CFA_expression";
- case DW_CFA_offset_extended_sf:
- return "DW_CFA_offset_extended_sf";
- case DW_CFA_def_cfa_sf:
- return "DW_CFA_def_cfa_sf";
- case DW_CFA_def_cfa_offset_sf:
- return "DW_CFA_def_cfa_offset_sf";
- case DW_CFA_val_offset:
- return "DW_CFA_val_offset";
- case DW_CFA_val_offset_sf:
- return "DW_CFA_val_offset_sf";
- case DW_CFA_val_expression:
- return "DW_CFA_val_expression";
- /* SGI/MIPS specific. */
- case DW_CFA_MIPS_advance_loc8:
- return "DW_CFA_MIPS_advance_loc8";
- /* GNU extensions. */
- case DW_CFA_GNU_window_save:
- return "DW_CFA_GNU_window_save";
- case DW_CFA_GNU_args_size:
- return "DW_CFA_GNU_args_size";
- case DW_CFA_GNU_negative_offset_extended:
- return "DW_CFA_GNU_negative_offset_extended";
- default:
- return "DW_CFA_<unknown>";
- }
+ return name;
}
-#endif
static void
dump_die_shallow (struct ui_file *f, int indent, struct die_info *die)
switch (die->attrs[i].form)
{
case DW_FORM_addr:
+ case DW_FORM_GNU_addr_index:
fprintf_unfiltered (f, "address: ");
fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f);
break;
fprintf_unfiltered (f, "ref address: ");
fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f);
break;
+ case DW_FORM_GNU_ref_alt:
+ fprintf_unfiltered (f, "alt ref address: ");
+ fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f);
+ break;
case DW_FORM_ref1:
case DW_FORM_ref2:
case DW_FORM_ref4:
break;
case DW_FORM_string:
case DW_FORM_strp:
+ case DW_FORM_GNU_str_index:
+ case DW_FORM_GNU_strp_alt:
fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)",
DW_STRING (&die->attrs[i])
? DW_STRING (&die->attrs[i]) : "",
case DW_FORM_ref4:
case DW_FORM_ref8:
case DW_FORM_ref_udata:
+ case DW_FORM_GNU_ref_alt:
return 1;
default:
return 0;
}
}
-/* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
- unit and add it to our queue.
- The result is non-zero if PER_CU was queued, otherwise the result is zero
- meaning either PER_CU is already queued or it is already loaded. */
-
-static int
-maybe_queue_comp_unit (struct dwarf2_cu *this_cu,
- struct dwarf2_per_cu_data *per_cu)
-{
- /* We may arrive here during partial symbol reading, if we need full
- DIEs to process an unusual case (e.g. template arguments). Do
- not queue PER_CU, just tell our caller to load its DIEs. */
- if (dwarf2_per_objfile->reading_partial_symbols)
- {
- if (per_cu->cu == NULL || per_cu->cu->dies == NULL)
- return 1;
- return 0;
- }
-
- /* Mark the dependence relation so that we don't flush PER_CU
- too early. */
- dwarf2_add_dependence (this_cu, per_cu);
-
- /* If it's already on the queue, we have nothing to do. */
- if (per_cu->queued)
- return 0;
-
- /* If the compilation unit is already loaded, just mark it as
- used. */
- if (per_cu->cu != NULL)
- {
- per_cu->cu->last_used = 0;
- return 0;
- }
-
- /* Add it to the queue. */
- queue_comp_unit (per_cu);
-
- return 1;
-}
-
/* Follow reference or signature attribute ATTR of SRC_DIE.
On entry *REF_CU is the CU of SRC_DIE.
On exit *REF_CU is the CU of the result. */
Returns NULL if OFFSET is invalid. */
static struct die_info *
-follow_die_offset (sect_offset offset, struct dwarf2_cu **ref_cu)
+follow_die_offset (sect_offset offset, int offset_in_dwz,
+ struct dwarf2_cu **ref_cu)
{
struct die_info temp_die;
struct dwarf2_cu *target_cu, *cu = *ref_cu;
target_cu = cu;
- if (cu->per_cu->debug_types_section)
+ if (cu->per_cu->is_debug_types)
{
/* .debug_types CUs cannot reference anything outside their CU.
If they need to, they have to reference a signatured type via
if (! offset_in_cu_p (&cu->header, offset))
return NULL;
}
- else if (! offset_in_cu_p (&cu->header, offset))
+ else if (offset_in_dwz != cu->per_cu->is_dwz
+ || ! offset_in_cu_p (&cu->header, offset))
{
struct dwarf2_per_cu_data *per_cu;
- per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile);
+ per_cu = dwarf2_find_containing_comp_unit (offset, offset_in_dwz,
+ cu->objfile);
/* If necessary, add it to the queue and load its DIEs. */
- if (maybe_queue_comp_unit (cu, per_cu))
- load_full_comp_unit (per_cu);
+ if (maybe_queue_comp_unit (cu, per_cu, cu->language))
+ load_full_comp_unit (per_cu, cu->language);
target_cu = per_cu->cu;
}
{
/* We're loading full DIEs during partial symbol reading. */
gdb_assert (dwarf2_per_objfile->reading_partial_symbols);
- load_full_comp_unit (cu->per_cu);
+ load_full_comp_unit (cu->per_cu, language_minimal);
}
*ref_cu = target_cu;
struct dwarf2_cu *cu = *ref_cu;
struct die_info *die;
- die = follow_die_offset (offset, ref_cu);
+ die = follow_die_offset (offset,
+ (attr->form == DW_FORM_GNU_ref_alt
+ || cu->per_cu->is_dwz),
+ ref_cu);
if (!die)
error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
"at 0x%x [in module %s]"),
load_cu (per_cu);
cu = per_cu->cu;
- die = follow_die_offset (offset, &cu);
+ die = follow_die_offset (offset, per_cu->is_dwz, &cu);
if (!die)
error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
offset.sect_off, per_cu->objfile->name);
/* If necessary, add it to the queue and load its DIEs. */
- if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu))
+ if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal))
read_signatured_type (sig_type);
gdb_assert (sig_type->per_cu.cu != NULL);
sig_cu = sig_type->per_cu.cu;
- temp_die.offset.sect_off = (sig_type->per_cu.offset.sect_off
- + sig_type->type_offset.cu_off);
+ gdb_assert (sig_type->type_offset_in_section.sect_off != 0);
+ temp_die.offset = sig_type->type_offset_in_section;
die = htab_find_with_hash (sig_cu->die_hash, &temp_die,
temp_die.offset.sect_off);
if (die)
static void
load_full_type_unit (struct dwarf2_per_cu_data *per_cu)
{
- struct objfile *objfile = per_cu->objfile;
- struct dwarf2_section_info *sect = per_cu->debug_types_section;
- sect_offset offset = per_cu->offset;
struct signatured_type *sig_type;
- dwarf2_read_section (objfile, sect);
+ /* Caller is responsible for ensuring type_unit_groups don't get here. */
+ gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu));
- /* We have the section offset, but we need the signature to do the
- hash table lookup. */
- /* FIXME: This is sorta unnecessary, read_signatured_type only uses
- the signature to assert we found the right one.
- Ok, but it's a lot of work. We should simplify things so any needed
- assert doesn't require all this clumsiness. */
- sig_type = lookup_signatured_type_at_offset (objfile, sect, offset);
+ /* We have the per_cu, but we need the signatured_type.
+ Fortunately this is an easy translation. */
+ gdb_assert (per_cu->is_debug_types);
+ sig_type = (struct signatured_type *) per_cu;
- gdb_assert (&sig_type->per_cu == per_cu);
- gdb_assert (sig_type->per_cu.cu == NULL);
+ gdb_assert (per_cu->cu == NULL);
read_signatured_type (sig_type);
- gdb_assert (sig_type->per_cu.cu != NULL);
+ gdb_assert (per_cu->cu != NULL);
}
/* die_reader_func for read_signatured_type.
void *data)
{
struct dwarf2_cu *cu = reader->cu;
- struct attribute *attr;
gdb_assert (cu->die_hash == NULL);
cu->die_hash =
or we won't be able to build types correctly.
Similarly, if we do not read the producer, we can not apply
producer-specific interpretation. */
- prepare_one_comp_unit (cu, cu->dies);
+ prepare_one_comp_unit (cu, cu->dies, language_minimal);
}
-/* Read in a signatured type and build its CU and DIEs. */
+/* Read in a signatured type and build its CU and DIEs.
+ If the type is a stub for the real type in a DWO file,
+ read in the real type from the DWO file as well. */
static void
read_signatured_type (struct signatured_type *sig_type)
{
struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu;
- gdb_assert (per_cu->debug_types_section);
+ gdb_assert (per_cu->is_debug_types);
gdb_assert (per_cu->cu == NULL);
- init_tu_and_read_dies (per_cu, 1, read_signatured_type_reader, NULL);
+ init_cutu_and_read_dies (per_cu, NULL, 0, 1,
+ read_signatured_type_reader, NULL);
}
/* Decode simple location descriptions.
case DW_OP_GNU_uninit:
break;
+ case DW_OP_GNU_addr_index:
+ case DW_OP_GNU_const_index:
+ stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i],
+ &bytes_read);
+ i += bytes_read;
+ break;
+
default:
{
- const char *name = dwarf_stack_op_name (op);
+ const char *name = get_DW_OP_name (op);
if (name)
complaint (&symfile_complaints, _("unsupported stack op: '%s'"),
return (blk);
}
-static struct abbrev_info *
-dwarf_alloc_abbrev (struct dwarf2_cu *cu)
-{
- struct abbrev_info *abbrev;
-
- abbrev = (struct abbrev_info *)
- obstack_alloc (&cu->abbrev_obstack, sizeof (struct abbrev_info));
- memset (abbrev, 0, sizeof (struct abbrev_info));
- return (abbrev);
-}
-
static struct die_info *
dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs)
{
objfile->macro_cache);
if (! current_file)
- /* If we have no current file, then this must be the start_file
- directive for the compilation unit's main source file. */
- current_file = macro_set_main (pending_macros, full_name);
+ {
+ /* If we have no current file, then this must be the start_file
+ directive for the compilation unit's main source file. */
+ current_file = macro_set_main (pending_macros, full_name);
+ macro_define_special (pending_macros);
+ }
else
current_file = macro_include (current_file, line, full_name);
Returns the new pointer. */
static gdb_byte *
-skip_form_bytes (bfd *abfd, gdb_byte *bytes,
+skip_form_bytes (bfd *abfd, gdb_byte *bytes, gdb_byte *buffer_end,
enum dwarf_form form,
unsigned int offset_size,
struct dwarf2_section_info *section)
case DW_FORM_sec_offset:
case DW_FORM_strp:
+ case DW_FORM_GNU_strp_alt:
bytes += offset_size;
break;
case DW_FORM_sdata:
case DW_FORM_udata:
- bytes = skip_leb128 (abfd, bytes);
+ case DW_FORM_GNU_addr_index:
+ case DW_FORM_GNU_str_index:
+ bytes = (gdb_byte *) gdb_skip_leb128 (bytes, buffer_end);
+ if (bytes == NULL)
+ {
+ dwarf2_section_buffer_overflow_complaint (section);
+ return NULL;
+ }
break;
default:
static gdb_byte *
skip_unknown_opcode (unsigned int opcode,
gdb_byte **opcode_definitions,
- gdb_byte *mac_ptr,
+ gdb_byte *mac_ptr, gdb_byte *mac_end,
bfd *abfd,
unsigned int offset_size,
struct dwarf2_section_info *section)
for (i = 0; i < arg; ++i)
{
- mac_ptr = skip_form_bytes (abfd, mac_ptr, defn[i], offset_size, section);
+ mac_ptr = skip_form_bytes (abfd, mac_ptr, mac_end, defn[i], offset_size,
+ section);
if (mac_ptr == NULL)
{
/* skip_form_bytes already issued the complaint. */
struct macro_source_file *current_file,
struct line_header *lh, char *comp_dir,
struct dwarf2_section_info *section,
- int section_is_gnu,
+ int section_is_gnu, int section_is_dwz,
unsigned int offset_size,
struct objfile *objfile,
htab_t include_hash)
/* Do we at least have room for a macinfo type byte? */
if (mac_ptr >= mac_end)
{
- dwarf2_macros_too_long_complaint (section);
+ dwarf2_section_buffer_overflow_complaint (section);
break;
}
case DW_MACRO_GNU_undef:
case DW_MACRO_GNU_define_indirect:
case DW_MACRO_GNU_undef_indirect:
+ case DW_MACRO_GNU_define_indirect_alt:
+ case DW_MACRO_GNU_undef_indirect_alt:
{
unsigned int bytes_read;
int line;
str_offset = read_offset_1 (abfd, mac_ptr, offset_size);
mac_ptr += offset_size;
- body = read_indirect_string_at_offset (abfd, str_offset);
+ if (macinfo_type == DW_MACRO_GNU_define_indirect_alt
+ || macinfo_type == DW_MACRO_GNU_undef_indirect_alt
+ || section_is_dwz)
+ {
+ struct dwz_file *dwz = dwarf2_get_dwz_file ();
+
+ body = read_indirect_string_from_dwz (dwz, str_offset);
+ }
+ else
+ body = read_indirect_string_at_offset (abfd, str_offset);
}
is_define = (macinfo_type == DW_MACRO_GNU_define
- || macinfo_type == DW_MACRO_GNU_define_indirect);
+ || macinfo_type == DW_MACRO_GNU_define_indirect
+ || macinfo_type == DW_MACRO_GNU_define_indirect_alt);
if (! current_file)
{
/* DWARF violation as no main source is present. */
else
{
gdb_assert (macinfo_type == DW_MACRO_GNU_undef
- || macinfo_type == DW_MACRO_GNU_undef_indirect);
+ || macinfo_type == DW_MACRO_GNU_undef_indirect
+ || macinfo_type == DW_MACRO_GNU_undef_indirect_alt);
macro_undef (current_file, line, body);
}
}
/* Do we at least have room for a macinfo type byte? */
if (mac_ptr >= mac_end)
{
- dwarf2_macros_too_long_complaint (section);
+ dwarf2_section_buffer_overflow_complaint (section);
return;
}
break;
case DW_MACRO_GNU_transparent_include:
+ case DW_MACRO_GNU_transparent_include_alt:
{
LONGEST offset;
void **slot;
}
else
{
+ bfd *include_bfd = abfd;
+ struct dwarf2_section_info *include_section = section;
+ struct dwarf2_section_info alt_section;
+ gdb_byte *include_mac_end = mac_end;
+ int is_dwz = section_is_dwz;
+
*slot = mac_ptr;
- dwarf_decode_macro_bytes (abfd,
- section->buffer + offset,
- mac_end, current_file,
+ if (macinfo_type == DW_MACRO_GNU_transparent_include_alt)
+ {
+ struct dwz_file *dwz = dwarf2_get_dwz_file ();
+
+ dwarf2_read_section (dwarf2_per_objfile->objfile,
+ &dwz->macro);
+
+ include_bfd = dwz->macro.asection->owner;
+ include_section = &dwz->macro;
+ include_mac_end = dwz->macro.buffer + dwz->macro.size;
+ is_dwz = 1;
+ }
+
+ dwarf_decode_macro_bytes (include_bfd,
+ include_section->buffer + offset,
+ include_mac_end, current_file,
lh, comp_dir,
- section, section_is_gnu,
+ section, section_is_gnu, is_dwz,
offset_size, objfile, include_hash);
htab_remove_elt (include_hash, mac_ptr);
default:
mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions,
- mac_ptr, abfd, offset_size,
+ mac_ptr, mac_end, abfd, offset_size,
section);
if (mac_ptr == NULL)
return;
}
static void
-dwarf_decode_macros (struct line_header *lh, unsigned int offset,
- char *comp_dir, bfd *abfd,
- struct dwarf2_cu *cu,
- struct dwarf2_section_info *section,
- int section_is_gnu)
+dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset,
+ char *comp_dir, int section_is_gnu)
{
struct objfile *objfile = dwarf2_per_objfile->objfile;
+ struct line_header *lh = cu->line_header;
+ bfd *abfd;
gdb_byte *mac_ptr, *mac_end;
struct macro_source_file *current_file = 0;
enum dwarf_macro_record_type macinfo_type;
struct cleanup *cleanup;
htab_t include_hash;
void **slot;
+ struct dwarf2_section_info *section;
+ const char *section_name;
+
+ if (cu->dwo_unit != NULL)
+ {
+ if (section_is_gnu)
+ {
+ section = &cu->dwo_unit->dwo_file->sections.macro;
+ section_name = ".debug_macro.dwo";
+ }
+ else
+ {
+ section = &cu->dwo_unit->dwo_file->sections.macinfo;
+ section_name = ".debug_macinfo.dwo";
+ }
+ }
+ else
+ {
+ if (section_is_gnu)
+ {
+ section = &dwarf2_per_objfile->macro;
+ section_name = ".debug_macro";
+ }
+ else
+ {
+ section = &dwarf2_per_objfile->macinfo;
+ section_name = ".debug_macinfo";
+ }
+ }
dwarf2_read_section (objfile, section);
if (section->buffer == NULL)
{
- complaint (&symfile_complaints, _("missing %s section"),
- section->asection->name);
+ complaint (&symfile_complaints, _("missing %s section"), section_name);
return;
}
+ abfd = section->asection->owner;
/* First pass: Find the name of the base filename.
This filename is needed in order to process all macros whose definition
case DW_MACRO_GNU_define_indirect:
case DW_MACRO_GNU_undef_indirect:
+ case DW_MACRO_GNU_define_indirect_alt:
+ case DW_MACRO_GNU_undef_indirect_alt:
{
unsigned int bytes_read;
break;
case DW_MACRO_GNU_transparent_include:
+ case DW_MACRO_GNU_transparent_include_alt:
/* Note that, according to the spec, a transparent include
chain cannot call DW_MACRO_GNU_start_file. So, we can just
skip this opcode. */
default:
mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions,
- mac_ptr, abfd, offset_size,
+ mac_ptr, mac_end, abfd, offset_size,
section);
if (mac_ptr == NULL)
return;
slot = htab_find_slot (include_hash, mac_ptr, INSERT);
*slot = mac_ptr;
dwarf_decode_macro_bytes (abfd, mac_ptr, mac_end,
- current_file, lh, comp_dir, section, section_is_gnu,
+ current_file, lh, comp_dir, section,
+ section_is_gnu, 0,
offset_size, objfile, include_hash);
do_cleanups (cleanup);
}
}
}
+/* Return the .debug_loc section to use for CU.
+ For DWO files use .debug_loc.dwo. */
+
+static struct dwarf2_section_info *
+cu_debug_loc_section (struct dwarf2_cu *cu)
+{
+ if (cu->dwo_unit)
+ return &cu->dwo_unit->dwo_file->sections.loc;
+ return &dwarf2_per_objfile->loc;
+}
+
/* A helper function that fills in a dwarf2_loclist_baton. */
static void
struct dwarf2_loclist_baton *baton,
struct attribute *attr)
{
- dwarf2_read_section (dwarf2_per_objfile->objfile,
- &dwarf2_per_objfile->loc);
+ struct dwarf2_section_info *section = cu_debug_loc_section (cu);
+
+ dwarf2_read_section (dwarf2_per_objfile->objfile, section);
baton->per_cu = cu->per_cu;
gdb_assert (baton->per_cu);
/* We don't know how long the location list is, but make sure we
don't run off the edge of the section. */
- baton->size = dwarf2_per_objfile->loc.size - DW_UNSND (attr);
- baton->data = dwarf2_per_objfile->loc.buffer + DW_UNSND (attr);
+ baton->size = section->size - DW_UNSND (attr);
+ baton->data = section->buffer + DW_UNSND (attr);
baton->base_address = cu->base_address;
+ baton->from_dwo = cu->dwo_unit != NULL;
}
static void
struct dwarf2_cu *cu)
{
struct objfile *objfile = dwarf2_per_objfile->objfile;
+ struct dwarf2_section_info *section = cu_debug_loc_section (cu);
if (attr_form_is_section_offset (attr)
- /* ".debug_loc" may not exist at all, or the offset may be outside
+ /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
the section. If so, fall through to the complaint in the
other branch. */
- && DW_UNSND (attr) < dwarf2_section_size (objfile,
- &dwarf2_per_objfile->loc))
+ && DW_UNSND (attr) < dwarf2_section_size (objfile, section))
{
struct dwarf2_loclist_baton *baton;
per_cu_header_read_in (struct comp_unit_head *cu_headerp,
struct dwarf2_per_cu_data *per_cu)
{
- struct objfile *objfile;
- struct dwarf2_per_objfile *per_objfile;
gdb_byte *info_ptr;
if (per_cu->cu)
return &per_cu->cu->header;
- objfile = per_cu->objfile;
- per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
- info_ptr = per_objfile->info.buffer + per_cu->offset.sect_off;
+ info_ptr = per_cu->info_or_types_section->buffer + per_cu->offset.sect_off;
memset (cu_headerp, 0, sizeof (*cu_headerp));
- read_comp_unit_head (cu_headerp, info_ptr, objfile->obfd);
+ read_comp_unit_head (cu_headerp, info_ptr, per_cu->objfile->obfd);
return cu_headerp;
}
static struct dwarf2_per_cu_data *
dwarf2_find_containing_comp_unit (sect_offset offset,
+ unsigned int offset_in_dwz,
struct objfile *objfile)
{
struct dwarf2_per_cu_data *this_cu;
int low, high;
+ const sect_offset *cu_off;
low = 0;
high = dwarf2_per_objfile->n_comp_units - 1;
while (high > low)
{
+ struct dwarf2_per_cu_data *mid_cu;
int mid = low + (high - low) / 2;
- if (dwarf2_per_objfile->all_comp_units[mid]->offset.sect_off
- >= offset.sect_off)
+ mid_cu = dwarf2_per_objfile->all_comp_units[mid];
+ cu_off = &mid_cu->offset;
+ if (mid_cu->is_dwz > offset_in_dwz
+ || (mid_cu->is_dwz == offset_in_dwz
+ && cu_off->sect_off >= offset.sect_off))
high = mid;
else
low = mid + 1;
}
gdb_assert (low == high);
- if (dwarf2_per_objfile->all_comp_units[low]->offset.sect_off
- > offset.sect_off)
+ this_cu = dwarf2_per_objfile->all_comp_units[low];
+ cu_off = &this_cu->offset;
+ if (this_cu->is_dwz != offset_in_dwz || cu_off->sect_off > offset.sect_off)
{
- if (low == 0)
+ if (low == 0 || this_cu->is_dwz != offset_in_dwz)
error (_("Dwarf Error: could not find partial DIE containing "
"offset 0x%lx [in module %s]"),
(long) offset.sect_off, bfd_get_filename (objfile->obfd));
/* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
static void
-prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die)
+prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die,
+ enum language pretend_language)
{
struct attribute *attr;
set_cu_language (DW_UNSND (attr), cu);
else
{
- cu->language = language_minimal;
+ cu->language = pretend_language;
cu->language_defn = language_def (cu->language);
}
when the DIEs are flushed out of cache.
The CU "per_cu" pointer is needed because offset alone is not enough to
- uniquely identify the type. A file may have multiple .debug_types sections.
- We have to use something in dwarf2_per_cu_data (or the pointer to it)
- because we can enter the lookup routine, get_die_type_at_offset, from
- outside this file, and thus won't necessarily have PER_CU->cu.
- Fortunately, PER_CU is stable for the life of the objfile. */
+ uniquely identify the type. A file may have multiple .debug_types sections,
+ or the type may come from a DWO file. We have to use something in
+ dwarf2_per_cu_data (or the pointer to it) because we can enter the lookup
+ routine, get_die_type_at_offset, from outside this file, and thus won't
+ necessarily have PER_CU->cu. Fortunately, PER_CU is stable for the life
+ of the objfile. */
struct dwarf2_per_cu_offset_and_type
{
cmd_show_list (show_dwarf2_cmdlist, from_tty, "");
}
-/* If section described by INFO was mmapped, munmap it now. */
-
-static void
-munmap_section_buffer (struct dwarf2_section_info *info)
-{
- if (info->map_addr != NULL)
- {
-#ifdef HAVE_MMAP
- int res;
-
- res = munmap (info->map_addr, info->map_len);
- gdb_assert (res == 0);
-#else
- /* Without HAVE_MMAP, we should never be here to begin with. */
- gdb_assert_not_reached ("no mmap support");
-#endif
- }
-}
-
-/* munmap debug sections for OBJFILE, if necessary. */
+/* Free data associated with OBJFILE, if necessary. */
static void
dwarf2_per_objfile_free (struct objfile *objfile, void *d)
{
struct dwarf2_per_objfile *data = d;
int ix;
- struct dwarf2_section_info *section;
-
- /* This is sorted according to the order they're defined in to make it easier
- to keep in sync. */
- munmap_section_buffer (&data->info);
- munmap_section_buffer (&data->abbrev);
- munmap_section_buffer (&data->line);
- munmap_section_buffer (&data->loc);
- munmap_section_buffer (&data->macinfo);
- munmap_section_buffer (&data->macro);
- munmap_section_buffer (&data->str);
- munmap_section_buffer (&data->ranges);
- munmap_section_buffer (&data->frame);
- munmap_section_buffer (&data->eh_frame);
- munmap_section_buffer (&data->gdb_index);
- for (ix = 0;
- VEC_iterate (dwarf2_section_info_def, data->types, ix, section);
- ++ix)
- munmap_section_buffer (section);
+ for (ix = 0; ix < dwarf2_per_objfile->n_comp_units; ++ix)
+ VEC_free (dwarf2_per_cu_ptr,
+ dwarf2_per_objfile->all_comp_units[ix]->s.imported_symtabs);
VEC_free (dwarf2_section_info_def, data->types);
+
+ if (data->dwo_files)
+ free_dwo_files (data->dwo_files, objfile);
+
+ if (data->dwz_file && data->dwz_file->dwz_bfd)
+ gdb_bfd_unref (data->dwz_file->dwz_bfd);
}
\f
xfree (old_entries);
}
-/* Add an entry to SYMTAB. NAME is the name of the symbol. CU_INDEX
- is the index of the CU in which the symbol appears. */
+/* Add an entry to SYMTAB. NAME is the name of the symbol.
+ CU_INDEX is the index of the CU in which the symbol appears.
+ IS_STATIC is one if the symbol is static, otherwise zero (global). */
static void
add_index_entry (struct mapped_symtab *symtab, const char *name,
+ int is_static, gdb_index_symbol_kind kind,
offset_type cu_index)
{
struct symtab_index_entry **slot;
+ offset_type cu_index_and_attrs;
++symtab->n_elements;
if (4 * symtab->n_elements / 3 >= symtab->size)
{
*slot = XNEW (struct symtab_index_entry);
(*slot)->name = name;
+ /* index_offset is set later. */
(*slot)->cu_indices = NULL;
}
- /* Don't push an index twice. Due to how we add entries we only
- have to check the last one. */
- if (VEC_empty (offset_type, (*slot)->cu_indices)
- || VEC_last (offset_type, (*slot)->cu_indices) != cu_index)
- VEC_safe_push (offset_type, (*slot)->cu_indices, cu_index);
+
+ cu_index_and_attrs = 0;
+ DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs, cu_index);
+ DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs, is_static);
+ DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs, kind);
+
+ /* We don't want to record an index value twice as we want to avoid the
+ duplication.
+ We process all global symbols and then all static symbols
+ (which would allow us to avoid the duplication by only having to check
+ the last entry pushed), but a symbol could have multiple kinds in one CU.
+ To keep things simple we don't worry about the duplication here and
+ sort and uniqufy the list after we've processed all symbols. */
+ VEC_safe_push (offset_type, (*slot)->cu_indices, cu_index_and_attrs);
+}
+
+/* qsort helper routine for uniquify_cu_indices. */
+
+static int
+offset_type_compare (const void *ap, const void *bp)
+{
+ offset_type a = *(offset_type *) ap;
+ offset_type b = *(offset_type *) bp;
+
+ return (a > b) - (b > a);
+}
+
+/* Sort and remove duplicates of all symbols' cu_indices lists. */
+
+static void
+uniquify_cu_indices (struct mapped_symtab *symtab)
+{
+ int i;
+
+ for (i = 0; i < symtab->size; ++i)
+ {
+ struct symtab_index_entry *entry = symtab->data[i];
+
+ if (entry
+ && entry->cu_indices != NULL)
+ {
+ unsigned int next_to_insert, next_to_check;
+ offset_type last_value;
+
+ qsort (VEC_address (offset_type, entry->cu_indices),
+ VEC_length (offset_type, entry->cu_indices),
+ sizeof (offset_type), offset_type_compare);
+
+ last_value = VEC_index (offset_type, entry->cu_indices, 0);
+ next_to_insert = 1;
+ for (next_to_check = 1;
+ next_to_check < VEC_length (offset_type, entry->cu_indices);
+ ++next_to_check)
+ {
+ if (VEC_index (offset_type, entry->cu_indices, next_to_check)
+ != last_value)
+ {
+ last_value = VEC_index (offset_type, entry->cu_indices,
+ next_to_check);
+ VEC_replace (offset_type, entry->cu_indices, next_to_insert,
+ last_value);
+ ++next_to_insert;
+ }
+ }
+ VEC_truncate (offset_type, entry->cu_indices, next_to_insert);
+ }
+ }
}
/* Add a vector of indices to the constant pool. */
{
struct addrmap_index_data *data = datap;
struct partial_symtab *pst = obj;
- offset_type cu_index;
- void **slot;
if (data->previous_valid)
add_address_entry (data->objfile, data->addr_obstack,
addrmap_index_data.previous_cu_index);
}
+/* Return the symbol kind of PSYM. */
+
+static gdb_index_symbol_kind
+symbol_kind (struct partial_symbol *psym)
+{
+ domain_enum domain = PSYMBOL_DOMAIN (psym);
+ enum address_class aclass = PSYMBOL_CLASS (psym);
+
+ switch (domain)
+ {
+ case VAR_DOMAIN:
+ switch (aclass)
+ {
+ case LOC_BLOCK:
+ return GDB_INDEX_SYMBOL_KIND_FUNCTION;
+ case LOC_TYPEDEF:
+ return GDB_INDEX_SYMBOL_KIND_TYPE;
+ case LOC_COMPUTED:
+ case LOC_CONST_BYTES:
+ case LOC_OPTIMIZED_OUT:
+ case LOC_STATIC:
+ return GDB_INDEX_SYMBOL_KIND_VARIABLE;
+ case LOC_CONST:
+ /* Note: It's currently impossible to recognize psyms as enum values
+ short of reading the type info. For now punt. */
+ return GDB_INDEX_SYMBOL_KIND_VARIABLE;
+ default:
+ /* There are other LOC_FOO values that one might want to classify
+ as variables, but dwarf2read.c doesn't currently use them. */
+ return GDB_INDEX_SYMBOL_KIND_OTHER;
+ }
+ case STRUCT_DOMAIN:
+ return GDB_INDEX_SYMBOL_KIND_TYPE;
+ default:
+ return GDB_INDEX_SYMBOL_KIND_OTHER;
+ }
+}
+
/* Add a list of partial symbols to SYMTAB. */
static void
{
for (; count-- > 0; ++psymp)
{
- void **slot, *lookup;
+ struct partial_symbol *psym = *psymp;
+ void **slot;
- if (SYMBOL_LANGUAGE (*psymp) == language_ada)
+ if (SYMBOL_LANGUAGE (psym) == language_ada)
error (_("Ada is not currently supported by the index"));
- /* We only want to add a given psymbol once. However, we also
- want to account for whether it is global or static. So, we
- may add it twice, using slightly different values. */
- if (is_static)
- {
- uintptr_t val = 1 | (uintptr_t) *psymp;
-
- lookup = (void *) val;
- }
- else
- lookup = *psymp;
-
/* Only add a given psymbol once. */
- slot = htab_find_slot (psyms_seen, lookup, INSERT);
+ slot = htab_find_slot (psyms_seen, psym, INSERT);
if (!*slot)
{
- *slot = lookup;
- add_index_entry (symtab, SYMBOL_SEARCH_NAME (*psymp), cu_index);
+ gdb_index_symbol_kind kind = symbol_kind (psym);
+
+ *slot = psym;
+ add_index_entry (symtab, SYMBOL_SEARCH_NAME (psym),
+ is_static, kind, cu_index);
}
}
}
store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE,
entry->per_cu.offset.sect_off);
obstack_grow (info->types_list, val, 8);
- store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, entry->type_offset.cu_off);
+ store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE,
+ entry->type_offset_in_tu.cu_off);
obstack_grow (info->types_list, val, 8);
store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, entry->signature);
obstack_grow (info->types_list, val, 8);
return 1;
}
+/* Recurse into all "included" dependencies and write their symbols as
+ if they appeared in this psymtab. */
+
+static void
+recursively_write_psymbols (struct objfile *objfile,
+ struct partial_symtab *psymtab,
+ struct mapped_symtab *symtab,
+ htab_t psyms_seen,
+ offset_type cu_index)
+{
+ int i;
+
+ for (i = 0; i < psymtab->number_of_dependencies; ++i)
+ if (psymtab->dependencies[i]->user != NULL)
+ recursively_write_psymbols (objfile, psymtab->dependencies[i],
+ symtab, psyms_seen, cu_index);
+
+ write_psymbols (symtab,
+ psyms_seen,
+ objfile->global_psymbols.list + psymtab->globals_offset,
+ psymtab->n_global_syms, cu_index,
+ 0);
+ write_psymbols (symtab,
+ psyms_seen,
+ objfile->static_psymbols.list + psymtab->statics_offset,
+ psymtab->n_static_syms, cu_index,
+ 1);
+}
+
/* Create an index file for OBJFILE in the directory DIR. */
static void
struct mapped_symtab *symtab;
offset_type val, size_of_contents, total_len;
struct stat st;
- char buf[8];
htab_t psyms_seen;
htab_t cu_index_htab;
struct psymtab_cu_index_map *psymtab_cu_index_map;
struct psymtab_cu_index_map *map;
void **slot;
- write_psymbols (symtab,
- psyms_seen,
- objfile->global_psymbols.list + psymtab->globals_offset,
- psymtab->n_global_syms, i,
- 0);
- write_psymbols (symtab,
- psyms_seen,
- objfile->static_psymbols.list + psymtab->statics_offset,
- psymtab->n_static_syms, i,
- 1);
+ if (psymtab->user == NULL)
+ recursively_write_psymbols (objfile, psymtab, symtab, psyms_seen, i);
map = &psymtab_cu_index_map[i];
map->psymtab = psymtab;
write_one_signatured_type, &sig_data);
}
+ /* Now that we've processed all symbols we can shrink their cu_indices
+ lists. */
+ uniquify_cu_indices (symtab);
+
obstack_init (&constant_pool);
make_cleanup_obstack_free (&constant_pool);
obstack_init (&symtab_obstack);
total_len = size_of_contents;
/* The version number. */
- val = MAYBE_SWAP (6);
+ val = MAYBE_SWAP (7);
obstack_grow (&contents, &val, sizeof (val));
/* The offset of the CU list from the start of the file. */
&set_dwarf2_cmdlist,
&show_dwarf2_cmdlist);
+ add_setshow_boolean_cmd ("dwarf2-read", no_class, &dwarf2_read_debug, _("\
+Set debugging of the dwarf2 reader."), _("\
+Show debugging of the dwarf2 reader."), _("\
+When enabled, debugging messages are printed during dwarf2 reading\n\
+and symtab expansion."),
+ NULL,
+ NULL,
+ &setdebuglist, &showdebuglist);
+
add_setshow_zinteger_cmd ("dwarf2-die", no_class, &dwarf2_die_debug, _("\
Set debugging of the dwarf2 DIE reader."), _("\
Show debugging of the dwarf2 DIE reader."), _("\
NULL, show_check_physname,
&setdebuglist, &showdebuglist);
+ add_setshow_boolean_cmd ("use-deprecated-index-sections",
+ no_class, &use_deprecated_index_sections, _("\
+Set whether to use deprecated gdb_index sections."), _("\
+Show whether to use deprecated gdb_index sections."), _("\
+When enabled, deprecated .gdb_index sections are used anyway.\n\
+Normally they are ignored either because of a missing feature or\n\
+performance issue.\n\
+Warning: This option must be enabled before gdb reads the file."),
+ NULL,
+ NULL,
+ &setlist, &showlist);
+
c = add_cmd ("gdb-index", class_files, save_gdb_index_command,
_("\
Save a gdb-index file.\n\
projects / deliverable / binutils-gdb.git / blobdiff