/* DWARF 2 debugging format support for GDB.
- Copyright (C) 1994-2013 Free Software Foundation, Inc.
+ Copyright (C) 1994-2014 Free Software Foundation, Inc.
Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
Inc. with support from Florida State University (under contract
#include "jv-lang.h"
#include "psympriv.h"
#include "exceptions.h"
-#include "gdb_stat.h"
+#include <sys/stat.h>
#include "completer.h"
#include "vec.h"
#include "c-lang.h"
#include "gdb_bfd.h"
#include "f-lang.h"
#include "source.h"
+#include "filestuff.h"
+#include "build-id.h"
#include <fcntl.h>
-#include "gdb_string.h"
+#include <string.h>
#include "gdb_assert.h"
#include <sys/types.h>
typedef struct symbol *symbolp;
DEF_VEC_P (symbolp);
-/* When non-zero, print basic high level tracing messages.
+/* When == 1, print basic high level tracing messages.
+ When > 1, be more verbose.
This is in contrast to the low level DIE reading of dwarf2_die_debug. */
-static int dwarf2_read_debug = 0;
+static unsigned int dwarf2_read_debug = 0;
/* When non-zero, dump DIEs after they are read in. */
static unsigned int dwarf2_die_debug = 0;
static int dwarf2_locexpr_block_index;
static int dwarf2_loclist_block_index;
+/* A descriptor for dwarf sections.
+
+ S.ASECTION, SIZE are typically initialized when the objfile is first
+ scanned. BUFFER, READIN are filled in later when the section is read.
+ If the section contained compressed data then SIZE is updated to record
+ the uncompressed size of the section.
+
+ DWP file format V2 introduces a wrinkle that is easiest to handle by
+ creating the concept of virtual sections contained within a real section.
+ In DWP V2 the sections of the input DWO files are concatenated together
+ into one section, but section offsets are kept relative to the original
+ input section.
+ If this is a virtual dwp-v2 section, S.CONTAINING_SECTION is a backlink to
+ the real section this "virtual" section is contained in, and BUFFER,SIZE
+ describe the virtual section. */
+
struct dwarf2_section_info
{
- asection *asection;
- gdb_byte *buffer;
+ union
+ {
+ /* If this is a real section, the bfd section. */
+ asection *asection;
+ /* If this is a virtual section, pointer to the containing ("real")
+ section. */
+ struct dwarf2_section_info *containing_section;
+ } s;
+ /* Pointer to section data, only valid if readin. */
+ const gdb_byte *buffer;
+ /* The size of the section, real or virtual. */
bfd_size_type size;
+ /* If this is a virtual section, the offset in the real section.
+ Only valid if is_virtual. */
+ bfd_size_type virtual_offset;
/* True if we have tried to read this section. */
- int readin;
+ char readin;
+ /* True if this is a virtual section, False otherwise.
+ This specifies which of s.asection and s.containing_section to use. */
+ char is_virtual;
};
typedef struct dwarf2_section_info dwarf2_section_info_def;
/* The number of .debug_types-related CUs. */
int n_type_units;
- /* The .debug_types-related CUs (TUs). */
+ /* The .debug_types-related CUs (TUs).
+ This is stored in malloc space because we may realloc it. */
struct signatured_type **all_type_units;
/* The number of entries in all_type_unit_groups. */
/* Table mapping type DIEs to their struct type *.
This is NULL if not allocated yet.
- The mapping is done via (CU/TU signature + DIE offset) -> type. */
+ The mapping is done via (CU/TU + DIE offset) -> type. */
htab_t die_type_hash;
/* The CUs we recently read. */
compilation units are cached... */
struct dwarf2_per_cu_data *read_in_chain;
- /* Backchain to our per_cu entry if the tree has been built. */
+ /* Backlink to our per_cu entry. */
struct dwarf2_per_cu_data *per_cu;
/* How many compilation units ago was this CU last referenced? */
hash table and don't find it. */
unsigned int load_all_dies : 1;
- /* Non-zero if this CU is from .debug_types. */
+ /* Non-zero if this CU is from .debug_types.
+ Struct dwarf2_per_cu_data is contained in struct signatured_type iff
+ this is non-zero. */
unsigned int is_debug_types : 1;
/* Non-zero if this CU is from the .dwz file. */
unsigned int is_dwz : 1;
+ /* Non-zero if reading a TU directly from a DWO file, bypassing the stub.
+ This flag is only valid if is_debug_types is true.
+ We can't read a CU directly from a DWO file: There are required
+ attributes in the stub. */
+ unsigned int reading_dwo_directly : 1;
+
+ /* Non-zero if the TU has been read.
+ This is used to assist the "Stay in DWO Optimization" for Fission:
+ When reading a DWO, it's faster to read TUs from the DWO instead of
+ fetching them from random other DWOs (due to comdat folding).
+ If the TU has already been read, the optimization is unnecessary
+ (and unwise - we don't want to change where gdb thinks the TU lives
+ "midflight").
+ This flag is only valid if is_debug_types is true. */
+ unsigned int tu_read : 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. */
DW_TAG_imported_unit, so we just use the same mechanism: For
.gdb_index version <=7 this also records the TUs that the CU referred
to. Concurrently with this change gdb was modified to emit version 8
- indices so we only pay a price for gold generated indices. */
+ indices so we only pay a price for gold generated indices.
+ http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
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;
};
/* Entry in the signatured_types hash table. */
struct signatured_type
{
/* The "per_cu" object of this type.
+ This struct is used iff per_cu.is_debug_types.
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 value is zero until the actual value is known.
Zero is otherwise not a valid section offset. */
sect_offset type_offset_in_section;
+
+ /* Type units are grouped by their DW_AT_stmt_list entry so that they
+ can share them. This points to the containing symtab. */
+ struct type_unit_group *type_unit_group;
+
+ /* The type.
+ The first time we encounter this type we fully read it in and install it
+ in the symbol tables. Subsequent times we only need the type. */
+ struct type *type;
+
+ /* Containing DWO unit.
+ This field is valid iff per_cu.reading_dwo_directly. */
+ struct dwo_unit *dwo_unit;
};
+typedef struct signatured_type *sig_type_ptr;
+DEF_VEC_P (sig_type_ptr);
+
/* 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 type_unit_group
{
- /* dwarf2read.c's main "handle" on the symtab.
+ /* dwarf2read.c's main "handle" on a TU 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.
#define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->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 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 (sig_type_ptr) *tus;
/* The primary symtab.
Type units in a group needn't all be defined in the same source file,
struct symtab **symtabs;
};
-/* These sections are what may appear in a DWO file. */
+/* These sections are what may appear in a (real or virtual) DWO file. */
struct dwo_sections
{
/* The section this CU/TU lives in, in the DWO file. */
struct dwarf2_section_info *section;
- /* Same as dwarf2_per_cu_data:{offset,length} but for the DWO section. */
+ /* Same as dwarf2_per_cu_data:{offset,length} but in the DWO section. */
sect_offset offset;
unsigned int length;
cu_offset type_offset_in_tu;
};
+/* include/dwarf2.h defines the DWP section codes.
+ It defines a max value but it doesn't define a min value, which we
+ use for error checking, so provide one. */
+
+enum dwp_v2_section_ids
+{
+ DW_SECT_MIN = 1
+};
+
/* Data for one DWO file.
- This includes virtual DWO files that have been packaged into a
- DWP file. */
+
+ This includes virtual DWO files (a virtual DWO file is a DWO file as it
+ appears in a DWP file). DWP files don't really have DWO files per se -
+ comdat folding of types "loses" the DWO file they came from, and from
+ a high level view DWP files appear to contain a mass of random types.
+ However, to maintain consistency with the non-DWP case we pretend DWP
+ files contain virtual DWO files, and we assign each TU with one virtual
+ DWO file (generally based on the line and abbrev section offsets -
+ a heuristic that seems to work in practice). */
struct dwo_file
{
- /* The DW_AT_GNU_dwo_name attribute. This is the hash key.
+ /* The DW_AT_GNU_dwo_name attribute.
For virtual DWO files the name is constructed from the section offsets
of abbrev,line,loc,str_offsets so that we combine virtual DWO files
from related CU+TUs. */
- const char *name;
+ const char *dwo_name;
+
+ /* The DW_AT_comp_dir attribute. */
+ const char *comp_dir;
/* The bfd, when the file is open. Otherwise this is NULL.
This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
bfd *dbfd;
- /* Section info for this file. */
+ /* The sections that make up this DWO file.
+ Remember that for virtual DWO files in DWP V2, these are virtual
+ sections (for lack of a better name). */
struct dwo_sections sections;
- /* Table of CUs in the file.
- Each element is a struct dwo_unit. */
- htab_t cus;
+ /* The CU in the file.
+ We only support one because having more than one requires hacking the
+ dwo_name of each to match, which is highly unlikely to happen.
+ Doing this means all TUs can share comp_dir: We also assume that
+ DW_AT_comp_dir across all TUs in a DWO file will be identical. */
+ struct dwo_unit *cu;
/* Table of TUs in the file.
Each element is a struct dwo_unit. */
struct dwp_sections
{
+ /* These are used by both DWP version 1 and 2. */
struct dwarf2_section_info str;
struct dwarf2_section_info cu_index;
struct dwarf2_section_info tu_index;
- /* The .debug_info.dwo, .debug_types.dwo, and other sections are referenced
- by section number. We don't need to record them here. */
+
+ /* These are only used by DWP version 2 files.
+ In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
+ sections are referenced by section number, and are not recorded here.
+ In DWP version 2 there is at most one copy of all these sections, each
+ section being (effectively) comprised of the concatenation of all of the
+ individual sections that exist in the version 1 format.
+ To keep the code simple we treat each of these concatenated pieces as a
+ section itself (a virtual section?). */
+ 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_offsets;
+ struct dwarf2_section_info types;
};
-/* These sections are what may appear in a virtual DWO file. */
+/* These sections are what may appear in a virtual DWO file in DWP version 1.
+ A virtual DWO file is a DWO file as it appears in a DWP file. */
-struct virtual_dwo_sections
+struct virtual_v1_dwo_sections
{
struct dwarf2_section_info abbrev;
struct dwarf2_section_info line;
struct dwarf2_section_info info_or_types;
};
+/* Similar to virtual_v1_dwo_sections, but for DWP version 2.
+ In version 2, the sections of the DWO files are concatenated together
+ and stored in one section of that name. Thus each ELF section contains
+ several "virtual" sections. */
+
+struct virtual_v2_dwo_sections
+{
+ bfd_size_type abbrev_offset;
+ bfd_size_type abbrev_size;
+
+ bfd_size_type line_offset;
+ bfd_size_type line_size;
+
+ bfd_size_type loc_offset;
+ bfd_size_type loc_size;
+
+ bfd_size_type macinfo_offset;
+ bfd_size_type macinfo_size;
+
+ bfd_size_type macro_offset;
+ bfd_size_type macro_size;
+
+ bfd_size_type str_offsets_offset;
+ bfd_size_type str_offsets_size;
+
+ /* Each DWP hash table entry records one CU or one TU.
+ That is recorded here, and copied to dwo_unit.section. */
+ bfd_size_type info_or_types_offset;
+ bfd_size_type info_or_types_size;
+};
+
/* Contents of DWP hash tables. */
struct dwp_hash_table
{
+ uint32_t version, nr_columns;
uint32_t nr_units, nr_slots;
- const gdb_byte *hash_table, *unit_table, *section_pool;
+ const gdb_byte *hash_table, *unit_table;
+ union
+ {
+ struct
+ {
+ const gdb_byte *indices;
+ } v1;
+ struct
+ {
+ /* This is indexed by column number and gives the id of the section
+ in that column. */
+#define MAX_NR_V2_DWO_SECTIONS \
+ (1 /* .debug_info or .debug_types */ \
+ + 1 /* .debug_abbrev */ \
+ + 1 /* .debug_line */ \
+ + 1 /* .debug_loc */ \
+ + 1 /* .debug_str_offsets */ \
+ + 1 /* .debug_macro or .debug_macinfo */)
+ int section_ids[MAX_NR_V2_DWO_SECTIONS];
+ const gdb_byte *offsets;
+ const gdb_byte *sizes;
+ } v2;
+ } section_pool;
};
/* Data for one DWP file. */
/* Name of the file. */
const char *name;
- /* The bfd, when the file is open. Otherwise this is NULL. */
+ /* File format version. */
+ int version;
+
+ /* The bfd. */
bfd *dbfd;
/* Section info for this file. */
struct dwp_sections sections;
- /* Table of CUs in the file. */
+ /* Table of CUs in the file. */
const struct dwp_hash_table *cus;
/* Table of TUs in the file. */
const struct dwp_hash_table *tus;
- /* Table of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
- htab_t loaded_cutus;
+ /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
+ htab_t loaded_cus;
+ htab_t loaded_tus;
- /* Table to map ELF section numbers to their sections. */
+ /* Table to map ELF section numbers to their sections.
+ This is only needed for the DWP V1 file format. */
unsigned int num_sections;
asection **elf_sections;
};
struct die_reader_specs
{
- /* die_section->asection->owner. */
+ /* The bfd of die_section. */
bfd* abfd;
/* The CU of the DIE we are parsing. */
struct dwarf2_section_info *die_section;
/* die_section->buffer. */
- gdb_byte *buffer;
+ const gdb_byte *buffer;
/* The end of the buffer. */
const gdb_byte *buffer_end;
+
+ /* The value of the DW_AT_comp_dir attribute. */
+ const char *comp_dir;
};
/* 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,
+ const gdb_byte *info_ptr,
struct die_info *comp_unit_die,
int has_children,
void *data);
debug_line_buffer. If you try to free them, `free' will get
indigestion. */
unsigned int num_include_dirs, include_dirs_size;
- char **include_dirs;
+ const char **include_dirs;
/* The file_names table. NOTE! These strings are not allocated
with xmalloc; instead, they are pointers into debug_line_buffer.
unsigned int num_file_names, file_names_size;
struct file_entry
{
- char *name;
+ const char *name;
unsigned int dir_index;
unsigned int mod_time;
unsigned int length;
/* The start and end of the statement program following this
header. These point into dwarf2_per_objfile->line_buffer. */
- gdb_byte *statement_program_start, *statement_program_end;
+ const gdb_byte *statement_program_start, *statement_program_end;
};
/* When we construct a partial symbol table entry we only
DW_AT_sibling, if any. */
/* NOTE: This member isn't strictly necessary, read_partial_die could
return DW_AT_sibling values to its caller load_partial_dies. */
- gdb_byte *sibling;
+ const gdb_byte *sibling;
/* If HAS_SPECIFICATION, the offset of the DIE referred to by
DW_AT_specification (or DW_AT_abstract_origin or
ULONGEST unsnd;
LONGEST snd;
CORE_ADDR addr;
- struct signatured_type *signatured_type;
+ ULONGEST signature;
}
u;
};
#define DW_BLOCK(attr) ((attr)->u.blk)
#define DW_SND(attr) ((attr)->u.snd)
#define DW_ADDR(attr) ((attr)->u.addr)
-#define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
+#define DW_SIGNATURE(attr) ((attr)->u.signature)
/* Blocks are a bunch of untyped bytes. */
struct dwarf_block
size_t size;
/* Valid only if SIZE is not zero. */
- gdb_byte *data;
+ const gdb_byte *data;
};
#ifndef ATTR_ALLOC_CHUNK
"dwarf2 compilation units is %s.\n"),
value);
}
+\f
+/* local function prototypes */
+static const char *get_section_name (const struct dwarf2_section_info *);
-/* Various complaints about symbol reading that don't abort the process. */
-
-static void
-dwarf2_statement_list_fits_in_line_number_section_complaint (void)
-{
- complaint (&symfile_complaints,
- _("statement list doesn't fit in .debug_line section"));
-}
-
-static void
-dwarf2_debug_line_missing_file_complaint (void)
-{
- complaint (&symfile_complaints,
- _(".debug_line section has line data without a file"));
-}
-
-static void
-dwarf2_debug_line_missing_end_sequence_complaint (void)
-{
- complaint (&symfile_complaints,
- _(".debug_line section has line "
- "program sequence without an end"));
-}
-
-static void
-dwarf2_complex_location_expr_complaint (void)
-{
- complaint (&symfile_complaints, _("location expression too complex"));
-}
-
-static void
-dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2,
- int arg3)
-{
- complaint (&symfile_complaints,
- _("const value length mismatch for '%s', got %d, expected %d"),
- arg1, arg2, arg3);
-}
-
-static void
-dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info *section)
-{
- complaint (&symfile_complaints,
- _("debug info runs off end of %s section"
- " [in module %s]"),
- section->asection->name,
- bfd_get_filename (section->asection->owner));
-}
-
-static void
-dwarf2_macro_malformed_definition_complaint (const char *arg1)
-{
- complaint (&symfile_complaints,
- _("macro debug info contains a "
- "malformed macro definition:\n`%s'"),
- arg1);
-}
-
-static void
-dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2)
-{
- complaint (&symfile_complaints,
- _("invalid attribute class or form for '%s' in '%s'"),
- arg1, arg2);
-}
-
-/* local function prototypes */
+static const char *get_section_file_name (const struct dwarf2_section_info *);
static void dwarf2_locate_sections (bfd *, asection *, void *);
-static void dwarf2_create_include_psymtab (char *, struct partial_symtab *,
- struct objfile *);
-
static void dwarf2_find_base_address (struct die_info *die,
struct dwarf2_cu *cu);
static void dwarf2_free_abbrev_table (void *);
-static unsigned int peek_abbrev_code (bfd *, gdb_byte *);
+static unsigned int peek_abbrev_code (bfd *, const gdb_byte *);
static struct partial_die_info *load_partial_dies
- (const struct die_reader_specs *, gdb_byte *, int);
+ (const struct die_reader_specs *, const gdb_byte *, int);
-static gdb_byte *read_partial_die (const struct die_reader_specs *,
- struct partial_die_info *,
- struct abbrev_info *,
- unsigned int,
- gdb_byte *);
+static const gdb_byte *read_partial_die (const struct die_reader_specs *,
+ struct partial_die_info *,
+ struct abbrev_info *,
+ unsigned int,
+ const gdb_byte *);
static struct partial_die_info *find_partial_die (sect_offset, int,
struct dwarf2_cu *);
static void fixup_partial_die (struct partial_die_info *,
struct dwarf2_cu *);
-static gdb_byte *read_attribute (const struct die_reader_specs *,
- struct attribute *, struct attr_abbrev *,
- gdb_byte *);
+static const gdb_byte *read_attribute (const struct die_reader_specs *,
+ struct attribute *, struct attr_abbrev *,
+ const gdb_byte *);
static unsigned int read_1_byte (bfd *, const gdb_byte *);
static ULONGEST read_8_bytes (bfd *, const gdb_byte *);
-static CORE_ADDR read_address (bfd *, gdb_byte *ptr, struct dwarf2_cu *,
+static CORE_ADDR read_address (bfd *, const gdb_byte *ptr, struct dwarf2_cu *,
unsigned int *);
-static LONGEST read_initial_length (bfd *, gdb_byte *, unsigned int *);
+static LONGEST read_initial_length (bfd *, const gdb_byte *, unsigned int *);
static LONGEST read_checked_initial_length_and_offset
- (bfd *, gdb_byte *, const struct comp_unit_head *,
+ (bfd *, const gdb_byte *, const struct comp_unit_head *,
unsigned int *, unsigned int *);
-static LONGEST read_offset (bfd *, gdb_byte *, const struct comp_unit_head *,
+static LONGEST read_offset (bfd *, const gdb_byte *,
+ const struct comp_unit_head *,
unsigned int *);
-static LONGEST read_offset_1 (bfd *, gdb_byte *, unsigned int);
+static LONGEST read_offset_1 (bfd *, const 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 const gdb_byte *read_n_bytes (bfd *, const gdb_byte *, unsigned int);
-static char *read_direct_string (bfd *, gdb_byte *, unsigned int *);
+static const char *read_direct_string (bfd *, const gdb_byte *, unsigned int *);
-static char *read_indirect_string (bfd *, gdb_byte *,
- const struct comp_unit_head *,
- unsigned int *);
+static const char *read_indirect_string (bfd *, const gdb_byte *,
+ const struct comp_unit_head *,
+ unsigned int *);
-static char *read_indirect_string_from_dwz (struct dwz_file *, LONGEST);
+static const char *read_indirect_string_from_dwz (struct dwz_file *, LONGEST);
-static ULONGEST read_unsigned_leb128 (bfd *, gdb_byte *, unsigned int *);
+static ULONGEST read_unsigned_leb128 (bfd *, const gdb_byte *, unsigned int *);
-static LONGEST read_signed_leb128 (bfd *, gdb_byte *, unsigned int *);
+static LONGEST read_signed_leb128 (bfd *, const gdb_byte *, unsigned int *);
-static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, gdb_byte *,
+static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *,
+ const gdb_byte *,
unsigned int *);
-static char *read_str_index (const struct die_reader_specs *reader,
- struct dwarf2_cu *cu, ULONGEST str_index);
+static const 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 *);
static void free_line_header (struct line_header *lh);
-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,
struct dwarf2_cu *cu);
struct dwarf2_cu *, struct partial_symtab *,
int);
-static void dwarf2_start_subfile (char *, const char *, const char *);
+static void dwarf2_start_subfile (const char *, const char *, const char *);
static void dwarf2_start_symtab (struct dwarf2_cu *,
const char *, const char *, CORE_ADDR);
static struct symbol *new_symbol_full (struct die_info *, struct type *,
struct dwarf2_cu *, struct symbol *);
-static void dwarf2_const_value (struct attribute *, struct symbol *,
+static void dwarf2_const_value (const struct attribute *, struct symbol *,
struct dwarf2_cu *);
-static void dwarf2_const_value_attr (struct attribute *attr,
+static void dwarf2_const_value_attr (const struct attribute *attr,
struct type *type,
const char *name,
struct obstack *obstack,
struct dwarf2_cu *cu, LONGEST *value,
- gdb_byte **bytes,
+ const gdb_byte **bytes,
struct dwarf2_locexpr_baton **baton);
static struct type *die_type (struct die_info *, struct dwarf2_cu *);
static struct type *die_containing_type (struct die_info *,
struct dwarf2_cu *);
-static struct type *lookup_die_type (struct die_info *, struct attribute *,
+static struct type *lookup_die_type (struct die_info *, const struct attribute *,
struct dwarf2_cu *);
static struct type *read_type_die (struct die_info *, struct dwarf2_cu *);
static void read_import_statement (struct die_info *die, struct dwarf2_cu *);
+static int read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu);
+
static struct type *read_module_type (struct die_info *die,
struct dwarf2_cu *cu);
static enum dwarf_array_dim_ordering read_array_order (struct die_info *,
struct dwarf2_cu *);
-static struct die_info *read_die_and_children (const struct die_reader_specs *,
- gdb_byte *info_ptr,
- gdb_byte **new_info_ptr,
- struct die_info *parent);
+static struct die_info *read_die_and_siblings_1
+ (const struct die_reader_specs *, const gdb_byte *, const gdb_byte **,
+ struct die_info *);
static struct die_info *read_die_and_siblings (const struct die_reader_specs *,
- gdb_byte *info_ptr,
- gdb_byte **new_info_ptr,
+ const gdb_byte *info_ptr,
+ const 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 const gdb_byte *read_full_die_1 (const struct die_reader_specs *,
+ struct die_info **, const gdb_byte *,
+ int *, int);
-static gdb_byte *read_full_die (const struct die_reader_specs *,
- struct die_info **, gdb_byte *, int *);
+static const gdb_byte *read_full_die (const struct die_reader_specs *,
+ struct die_info **, const gdb_byte *,
+ int *);
static void process_die (struct die_info *, struct dwarf2_cu *);
static void store_in_ref_table (struct die_info *,
struct dwarf2_cu *);
-static int is_ref_attr (struct attribute *);
-
-static sect_offset dwarf2_get_ref_die_offset (struct attribute *);
+static sect_offset dwarf2_get_ref_die_offset (const struct attribute *);
-static LONGEST dwarf2_get_attr_constant_value (struct attribute *, int);
+static LONGEST dwarf2_get_attr_constant_value (const struct attribute *, int);
static struct die_info *follow_die_ref_or_sig (struct die_info *,
- struct attribute *,
+ const struct attribute *,
struct dwarf2_cu **);
static struct die_info *follow_die_ref (struct die_info *,
- struct attribute *,
+ const struct attribute *,
struct dwarf2_cu **);
static struct die_info *follow_die_sig (struct die_info *,
- struct attribute *,
+ const struct attribute *,
struct dwarf2_cu **);
-static struct signatured_type *lookup_signatured_type_at_offset
- (struct objfile *objfile,
- struct dwarf2_section_info *section, sect_offset offset);
+static struct type *get_signatured_type (struct die_info *, ULONGEST,
+ struct dwarf2_cu *);
+
+static struct type *get_DW_AT_signature_type (struct die_info *,
+ const struct attribute *,
+ struct dwarf2_cu *);
static void load_full_type_unit (struct dwarf2_per_cu_data *per_cu);
static void read_signatured_type (struct signatured_type *);
static struct type_unit_group *get_type_unit_group
- (struct dwarf2_cu *, struct attribute *);
+ (struct dwarf2_cu *, const struct attribute *);
static void build_type_unit_groups (die_reader_func_ftype *, void *);
static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int,
const char *, int);
-static int attr_form_is_block (struct attribute *);
+static int attr_form_is_block (const struct attribute *);
-static int attr_form_is_section_offset (struct attribute *);
+static int attr_form_is_section_offset (const struct attribute *);
-static int attr_form_is_constant (struct attribute *);
+static int attr_form_is_constant (const struct attribute *);
+
+static int attr_form_is_ref (const struct attribute *);
static void fill_in_loclist_baton (struct dwarf2_cu *cu,
struct dwarf2_loclist_baton *baton,
- struct attribute *attr);
+ const struct attribute *attr);
-static void dwarf2_symbol_mark_computed (struct attribute *attr,
+static void dwarf2_symbol_mark_computed (const struct attribute *attr,
struct symbol *sym,
struct dwarf2_cu *cu,
int is_block);
-static gdb_byte *skip_one_die (const struct die_reader_specs *reader,
- gdb_byte *info_ptr,
- struct abbrev_info *abbrev);
+static const gdb_byte *skip_one_die (const struct die_reader_specs *reader,
+ const gdb_byte *info_ptr,
+ struct abbrev_info *abbrev);
static void free_stack_comp_unit (void *);
static void dwarf2_clear_marks (struct dwarf2_per_cu_data *);
static struct type *get_die_type_at_offset (sect_offset,
- struct dwarf2_per_cu_data *per_cu);
+ struct dwarf2_per_cu_data *);
static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *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 void find_file_and_directory (struct die_info *die,
static char *file_full_name (int file, struct line_header *lh,
const char *comp_dir);
-static gdb_byte *read_and_check_comp_unit_head
+static const 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,
+ struct dwarf2_section_info *abbrev_section, const gdb_byte *info_ptr,
int is_debug_types_section);
static void init_cutu_and_read_dies
static htab_t allocate_dwo_unit_table (struct objfile *objfile);
+static struct dwo_unit *lookup_dwo_unit_in_dwp
+ (struct dwp_file *dwp_file, const char *comp_dir,
+ ULONGEST signature, int is_debug_types);
+
+static struct dwp_file *get_dwp_file (void);
+
static struct dwo_unit *lookup_dwo_comp_unit
(struct dwarf2_per_cu_data *, const char *, const char *, ULONGEST);
static struct dwo_unit *lookup_dwo_type_unit
(struct signatured_type *, const char *, const char *);
+static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *);
+
static void free_dwo_file_cleanup (void *);
static void process_cu_includes (void);
static void check_producer (struct dwarf2_cu *cu);
+\f
+/* Various complaints about symbol reading that don't abort the process. */
+
+static void
+dwarf2_statement_list_fits_in_line_number_section_complaint (void)
+{
+ complaint (&symfile_complaints,
+ _("statement list doesn't fit in .debug_line section"));
+}
+
+static void
+dwarf2_debug_line_missing_file_complaint (void)
+{
+ complaint (&symfile_complaints,
+ _(".debug_line section has line data without a file"));
+}
+
+static void
+dwarf2_debug_line_missing_end_sequence_complaint (void)
+{
+ complaint (&symfile_complaints,
+ _(".debug_line section has line "
+ "program sequence without an end"));
+}
+
+static void
+dwarf2_complex_location_expr_complaint (void)
+{
+ complaint (&symfile_complaints, _("location expression too complex"));
+}
+
+static void
+dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2,
+ int arg3)
+{
+ complaint (&symfile_complaints,
+ _("const value length mismatch for '%s', got %d, expected %d"),
+ arg1, arg2, arg3);
+}
+
+static void
+dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info *section)
+{
+ complaint (&symfile_complaints,
+ _("debug info runs off end of %s section"
+ " [in module %s]"),
+ get_section_name (section),
+ get_section_file_name (section));
+}
+
+static void
+dwarf2_macro_malformed_definition_complaint (const char *arg1)
+{
+ complaint (&symfile_complaints,
+ _("macro debug info contains a "
+ "malformed macro definition:\n`%s'"),
+ arg1);
+}
+static void
+dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2)
+{
+ complaint (&symfile_complaints,
+ _("invalid attribute class or form for '%s' in '%s'"),
+ arg1, arg2);
+}
+\f
#if WORDS_BIGENDIAN
/* Convert VALUE between big- and little-endian. */
(void *) names);
dwarf2_per_objfile->objfile = objfile;
}
- return (dwarf2_per_objfile->info.asection != NULL
- && dwarf2_per_objfile->abbrev.asection != NULL);
+ return (!dwarf2_per_objfile->info.is_virtual
+ && dwarf2_per_objfile->info.s.asection != NULL
+ && !dwarf2_per_objfile->abbrev.is_virtual
+ && dwarf2_per_objfile->abbrev.s.asection != NULL);
+}
+
+/* Return the containing section of virtual section SECTION. */
+
+static struct dwarf2_section_info *
+get_containing_section (const struct dwarf2_section_info *section)
+{
+ gdb_assert (section->is_virtual);
+ return section->s.containing_section;
+}
+
+/* Return the bfd owner of SECTION. */
+
+static struct bfd *
+get_section_bfd_owner (const struct dwarf2_section_info *section)
+{
+ if (section->is_virtual)
+ {
+ section = get_containing_section (section);
+ gdb_assert (!section->is_virtual);
+ }
+ return section->s.asection->owner;
+}
+
+/* Return the bfd section of SECTION.
+ Returns NULL if the section is not present. */
+
+static asection *
+get_section_bfd_section (const struct dwarf2_section_info *section)
+{
+ if (section->is_virtual)
+ {
+ section = get_containing_section (section);
+ gdb_assert (!section->is_virtual);
+ }
+ return section->s.asection;
+}
+
+/* Return the name of SECTION. */
+
+static const char *
+get_section_name (const struct dwarf2_section_info *section)
+{
+ asection *sectp = get_section_bfd_section (section);
+
+ gdb_assert (sectp != NULL);
+ return bfd_section_name (get_section_bfd_owner (section), sectp);
+}
+
+/* Return the name of the file SECTION is in. */
+
+static const char *
+get_section_file_name (const struct dwarf2_section_info *section)
+{
+ bfd *abfd = get_section_bfd_owner (section);
+
+ return bfd_get_filename (abfd);
+}
+
+/* Return the id of SECTION.
+ Returns 0 if SECTION doesn't exist. */
+
+static int
+get_section_id (const struct dwarf2_section_info *section)
+{
+ asection *sectp = get_section_bfd_section (section);
+
+ if (sectp == NULL)
+ return 0;
+ return sectp->id;
+}
+
+/* Return the flags of SECTION.
+ SECTION (or containing section if this is a virtual section) must exist. */
+
+static int
+get_section_flags (const struct dwarf2_section_info *section)
+{
+ asection *sectp = get_section_bfd_section (section);
+
+ gdb_assert (sectp != NULL);
+ return bfd_get_section_flags (sectp->owner, sectp);
}
/* When loading sections, we look either for uncompressed section or for
}
else if (section_is_p (sectp->name, &names->info))
{
- dwarf2_per_objfile->info.asection = sectp;
+ dwarf2_per_objfile->info.s.asection = sectp;
dwarf2_per_objfile->info.size = bfd_get_section_size (sectp);
}
else if (section_is_p (sectp->name, &names->abbrev))
{
- dwarf2_per_objfile->abbrev.asection = sectp;
+ dwarf2_per_objfile->abbrev.s.asection = sectp;
dwarf2_per_objfile->abbrev.size = bfd_get_section_size (sectp);
}
else if (section_is_p (sectp->name, &names->line))
{
- dwarf2_per_objfile->line.asection = sectp;
+ dwarf2_per_objfile->line.s.asection = sectp;
dwarf2_per_objfile->line.size = bfd_get_section_size (sectp);
}
else if (section_is_p (sectp->name, &names->loc))
{
- dwarf2_per_objfile->loc.asection = sectp;
+ dwarf2_per_objfile->loc.s.asection = sectp;
dwarf2_per_objfile->loc.size = bfd_get_section_size (sectp);
}
else if (section_is_p (sectp->name, &names->macinfo))
{
- dwarf2_per_objfile->macinfo.asection = sectp;
+ dwarf2_per_objfile->macinfo.s.asection = sectp;
dwarf2_per_objfile->macinfo.size = bfd_get_section_size (sectp);
}
else if (section_is_p (sectp->name, &names->macro))
{
- dwarf2_per_objfile->macro.asection = sectp;
+ dwarf2_per_objfile->macro.s.asection = sectp;
dwarf2_per_objfile->macro.size = bfd_get_section_size (sectp);
}
else if (section_is_p (sectp->name, &names->str))
{
- dwarf2_per_objfile->str.asection = sectp;
+ dwarf2_per_objfile->str.s.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.s.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;
+ dwarf2_per_objfile->frame.s.asection = sectp;
dwarf2_per_objfile->frame.size = bfd_get_section_size (sectp);
}
else if (section_is_p (sectp->name, &names->eh_frame))
{
- dwarf2_per_objfile->eh_frame.asection = sectp;
+ dwarf2_per_objfile->eh_frame.s.asection = sectp;
dwarf2_per_objfile->eh_frame.size = bfd_get_section_size (sectp);
}
else if (section_is_p (sectp->name, &names->ranges))
{
- dwarf2_per_objfile->ranges.asection = sectp;
+ dwarf2_per_objfile->ranges.s.asection = sectp;
dwarf2_per_objfile->ranges.size = bfd_get_section_size (sectp);
}
else if (section_is_p (sectp->name, &names->types))
struct dwarf2_section_info type_section;
memset (&type_section, 0, sizeof (type_section));
- type_section.asection = sectp;
+ type_section.s.asection = sectp;
type_section.size = bfd_get_section_size (sectp);
VEC_safe_push (dwarf2_section_info_def, dwarf2_per_objfile->types,
}
else if (section_is_p (sectp->name, &names->gdb_index))
{
- dwarf2_per_objfile->gdb_index.asection = sectp;
+ dwarf2_per_objfile->gdb_index.s.asection = sectp;
dwarf2_per_objfile->gdb_index.size = bfd_get_section_size (sectp);
}
or not present. */
static int
-dwarf2_section_empty_p (struct dwarf2_section_info *info)
+dwarf2_section_empty_p (const struct dwarf2_section_info *section)
{
- return info->asection == NULL || info->size == 0;
+ if (section->is_virtual)
+ return section->size == 0;
+ return section->s.asection == NULL || section->size == 0;
}
/* 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.
+ the section comes from. E.g., for DWO files the bfd of INFO 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)
{
- asection *sectp = info->asection;
+ asection *sectp;
bfd *abfd;
gdb_byte *buf, *retbuf;
- unsigned char header[4];
if (info->readin)
return;
if (dwarf2_section_empty_p (info))
return;
- abfd = sectp->owner;
+ sectp = get_section_bfd_section (info);
+
+ /* If this is a virtual section we need to read in the real one first. */
+ if (info->is_virtual)
+ {
+ struct dwarf2_section_info *containing_section =
+ get_containing_section (info);
+
+ gdb_assert (sectp != NULL);
+ if ((sectp->flags & SEC_RELOC) != 0)
+ {
+ error (_("Dwarf Error: DWP format V2 with relocations is not"
+ " supported in section %s [in module %s]"),
+ get_section_name (info), get_section_file_name (info));
+ }
+ dwarf2_read_section (objfile, containing_section);
+ /* Other code should have already caught virtual sections that don't
+ fit. */
+ gdb_assert (info->virtual_offset + info->size
+ <= containing_section->size);
+ /* If the real section is empty or there was a problem reading the
+ section we shouldn't get here. */
+ gdb_assert (containing_section->buffer != NULL);
+ info->buffer = containing_section->buffer + info->virtual_offset;
+ return;
+ }
/* If the section has relocations, we must read it ourselves.
Otherwise we attach it to the BFD. */
if ((sectp->flags & SEC_RELOC) == 0)
{
- const gdb_byte *bytes = gdb_bfd_map_section (sectp, &info->size);
-
- /* 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;
+ info->buffer = gdb_bfd_map_section (sectp, &info->size);
return;
}
return;
}
+ abfd = get_section_bfd_owner (info);
+ gdb_assert (abfd != NULL);
+
if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
|| bfd_bread (buf, info->size, abfd) != info->size)
- error (_("Dwarf Error: Can't read DWARF data from '%s'"),
- bfd_get_filename (abfd));
+ {
+ error (_("Dwarf Error: Can't read DWARF data"
+ " in section %s [in module %s]"),
+ bfd_section_name (abfd, sectp), bfd_get_filename (abfd));
+ }
}
/* A helper function that returns the size of a section in a safe way.
void
dwarf2_get_section_info (struct objfile *objfile,
enum dwarf2_section_enum sect,
- asection **sectp, gdb_byte **bufp,
+ asection **sectp, const gdb_byte **bufp,
bfd_size_type *sizep)
{
struct dwarf2_per_objfile *data
dwarf2_read_section (objfile, info);
- *sectp = info->asection;
+ *sectp = get_section_bfd_section (info);
*bufp = info->buffer;
*sizep = info->size;
}
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.s.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.s.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.s.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.s.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.s.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.s.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. */
+/* Open the separate '.dwz' debug file, if needed. Return NULL if
+ there is no .gnu_debugaltlink section in the file. Error if there
+ is such a section but the file cannot be found. */
static struct dwz_file *
dwarf2_get_dwz_file (void)
{
- bfd *abfd, *dwz_bfd;
- asection *section;
- gdb_byte *data;
+ bfd *dwz_bfd;
+ char *data;
struct cleanup *cleanup;
const char *filename;
struct dwz_file *result;
+ bfd_size_type buildid_len_arg;
+ size_t buildid_len;
+ bfd_byte *buildid;
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 ()));
+ bfd_set_error (bfd_error_no_error);
+ data = bfd_get_alt_debug_link_info (dwarf2_per_objfile->objfile->obfd,
+ &buildid_len_arg, &buildid);
+ if (data == NULL)
+ {
+ if (bfd_get_error () == bfd_error_no_error)
+ return NULL;
+ error (_("could not read '.gnu_debugaltlink' section: %s"),
+ bfd_errmsg (bfd_get_error ()));
+ }
cleanup = make_cleanup (xfree, data);
+ make_cleanup (xfree, buildid);
+
+ buildid_len = (size_t) buildid_len_arg;
- filename = data;
+ filename = (const char *) data;
if (!IS_ABSOLUTE_PATH (filename))
{
- char *abs = gdb_realpath (dwarf2_per_objfile->objfile->name);
+ char *abs = gdb_realpath (objfile_name (dwarf2_per_objfile->objfile));
char *rel;
make_cleanup (xfree, abs);
filename = rel;
}
- /* The format is just a NUL-terminated file name, followed by the
- build-id. For now, though, we ignore the build-id. */
+ /* First try the file name given in the section. If that doesn't
+ work, try to use the build-id instead. */
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))
+ if (dwz_bfd != NULL)
{
- gdb_bfd_unref (dwz_bfd);
- error (_("file '%s' was not usable: %s"), filename,
- bfd_errmsg (bfd_get_error ()));
+ if (!build_id_verify (dwz_bfd, buildid_len, buildid))
+ {
+ gdb_bfd_unref (dwz_bfd);
+ dwz_bfd = NULL;
+ }
}
+ if (dwz_bfd == NULL)
+ dwz_bfd = build_id_to_debug_bfd (buildid_len, buildid);
+
+ if (dwz_bfd == NULL)
+ error (_("could not find '.gnu_debugaltlink' file for %s"),
+ objfile_name (dwarf2_per_objfile->objfile));
+
result = OBSTACK_ZALLOC (&dwarf2_per_objfile->objfile->objfile_obstack,
struct dwz_file);
result->dwz_bfd = dwz_bfd;
do_cleanups (cleanup);
+ gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, dwz_bfd);
dwarf2_per_objfile->dwz_file = result;
return result;
}
{
queue_comp_unit (per_cu, language_minimal);
load_cu (per_cu);
+
+ /* If we just loaded a CU from a DWO, and we're working with an index
+ that may badly handle TUs, load all the TUs in that DWO as well.
+ http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
+ if (!per_cu->is_debug_types
+ && per_cu->cu->dwo_unit != NULL
+ && dwarf2_per_objfile->index_table != NULL
+ && dwarf2_per_objfile->index_table->version <= 7
+ /* DWP files aren't supported yet. */
+ && get_dwp_file () == NULL)
+ queue_and_load_all_dwo_tus (per_cu);
}
process_queue ();
dwarf2_per_objfile->n_type_units = elements / 3;
dwarf2_per_objfile->all_type_units
- = obstack_alloc (&objfile->objfile_obstack,
- dwarf2_per_objfile->n_type_units
- * sizeof (struct signatured_type *));
+ = xmalloc (dwarf2_per_objfile->n_type_units
+ * sizeof (struct signatured_type *));
sig_types_hash = allocate_signatured_type_table (objfile);
cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE);
iter += 4;
- if (cu_index < dwarf2_per_objfile->n_comp_units)
+ if (lo > hi)
{
- addrmap_set_empty (mutable_map, lo + baseaddr, hi + baseaddr - 1,
- dw2_get_cu (cu_index));
+ complaint (&symfile_complaints,
+ _(".gdb_index address table has invalid range (%s - %s)"),
+ hex_string (lo), hex_string (hi));
+ continue;
}
- else
+
+ if (cu_index >= dwarf2_per_objfile->n_comp_units)
{
complaint (&symfile_complaints,
_(".gdb_index address table has invalid CU number %u"),
(unsigned) cu_index);
+ continue;
}
+
+ addrmap_set_empty (mutable_map, lo + baseaddr, hi + baseaddr - 1,
+ dw2_get_cu (cu_index));
}
objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map,
const gdb_byte **types_list,
offset_type *types_list_elements)
{
- char *addr;
+ const gdb_byte *addr;
offset_type version;
offset_type *metadata;
int i;
/* 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 (section->asection) & SEC_HAS_CONTENTS) == 0)
+ if ((get_section_flags (section) & SEC_HAS_CONTENTS) == 0)
return 0;
dwarf2_read_section (objfile, section);
return 0;
}
/* Version 7 indices generated by gold refer to the CU for a symbol instead
- of the TU (for symbols coming from TUs). It's just a performance bug, and
- we can't distinguish gdb-generated indices from gold-generated ones, so
- nothing to do here. */
+ of the TU (for symbols coming from TUs),
+ http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
+ Plus gold-generated indices can have duplicate entries for global symbols,
+ http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
+ These are just performance bugs, and we can't distinguish gdb-generated
+ indices from gold-generated ones, so issue no warning here. */
/* Indexes with higher version than the one supported by GDB may be no
longer backward compatible. */
/ (2 * sizeof (offset_type)));
++i;
- map->constant_pool = addr + MAYBE_SWAP (metadata[i]);
+ map->constant_pool = (char *) (addr + MAYBE_SWAP (metadata[i]));
return 1;
}
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;
+ struct dwz_file *dwz;
- if (!read_index_from_section (objfile, objfile->name,
+ if (!read_index_from_section (objfile, objfile_name (objfile),
use_deprecated_index_sections,
&dwarf2_per_objfile->gdb_index, &local_map,
&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)
+ dwz = dwarf2_get_dwz_file ();
+ if (dwz != 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;
static void
dw2_get_file_names_reader (const struct die_reader_specs *reader,
- gdb_byte *info_ptr,
+ const gdb_byte *info_ptr,
struct die_info *comp_unit_die,
int has_children,
void *data)
struct quick_file_names *qfn;
unsigned int line_offset;
+ gdb_assert (! this_cu->is_debug_types);
+
/* 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)
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_cu = this_cu;
lh = NULL;
slot = NULL;
line_offset = 0;
static struct quick_file_names *
dw2_get_file_names (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));
+ /* This should never be called for TUs. */
+ gdb_assert (! this_cu->is_debug_types);
+ /* Nor type unit groups. */
+ gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu));
if (this_cu->v.quick->file_names != NULL)
return this_cu->v.quick->file_names;
if (this_cu->v.quick->no_file_data)
return 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->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);
+ init_cutu_and_read_dies_simple (this_cu, dw2_get_file_names_reader, NULL);
if (this_cu->v.quick->no_file_data)
return NULL;
{
if (qfn->real_names == NULL)
qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack,
- qfn->num_file_names, sizeof (char *));
+ qfn->num_file_names, char *);
if (qfn->real_names[index] == NULL)
qfn->real_names[index] = gdb_realpath (qfn->file_names[index]);
int next;
/* The number of elements in VEC, or zero if there is no match. */
int length;
+ /* Have we seen a global version of the symbol?
+ If so we can ignore all further global instances.
+ This is to work around gold/15646, inefficient gold-generated
+ indices. */
+ int global_seen;
};
/* Initialize the index symtab iterator ITER.
iter->block_index = block_index;
iter->domain = domain;
iter->next = 0;
+ iter->global_seen = 0;
if (find_slot_in_mapped_hash (index, name, &iter->vec))
iter->length = MAYBE_SWAP (*iter->vec);
offset_type cu_index_and_attrs =
MAYBE_SWAP (iter->vec[iter->next + 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);
+ struct dwarf2_per_cu_data *per_cu;
int want_static = iter->block_index != GLOBAL_BLOCK;
/* This value is only valid for index versions >= 7. */
int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs);
(iter->index->version >= 7
&& symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE);
+ /* Don't crash on bad data. */
+ if (cu_index >= (dwarf2_per_objfile->n_comp_units
+ + dwarf2_per_objfile->n_type_units))
+ {
+ complaint (&symfile_complaints,
+ _(".gdb_index entry has bad CU index"
+ " [in module %s]"),
+ objfile_name (dwarf2_per_objfile->objfile));
+ continue;
+ }
+
+ per_cu = dw2_get_cu (cu_index);
+
/* Skip if already read in. */
if (per_cu->v.quick->symtab)
continue;
- if (attrs_valid
- && iter->want_specific_block
- && want_static != is_static)
- continue;
+ /* Check static vs global. */
+ if (attrs_valid)
+ {
+ if (iter->want_specific_block
+ && want_static != is_static)
+ continue;
+ /* Work around gold/15646. */
+ if (!is_static && iter->global_seen)
+ continue;
+ if (!is_static)
+ iter->global_seen = 1;
+ }
/* Only check the symbol's kind if it has one. */
if (attrs_valid)
printf_filtered (_(" Number of unread CUs: %d\n"), count);
}
+/* This dumps minimal information about the index.
+ It is called via "mt print objfiles".
+ One use is to verify .gdb_index has been loaded by the
+ gdb.dwarf2/gdb-index.exp testcase. */
+
static void
dw2_dump (struct objfile *objfile)
{
- /* Nothing worth printing. */
+ dw2_setup (objfile);
+ gdb_assert (dwarf2_per_objfile->using_index);
+ printf_filtered (".gdb_index:");
+ if (dwarf2_per_objfile->index_table != NULL)
+ {
+ printf_filtered (" version %d\n",
+ dwarf2_per_objfile->index_table->version);
+ }
+ else
+ printf_filtered (" faked for \"readnow\"\n");
+ printf_filtered ("\n");
}
static void
-dw2_relocate (struct objfile *objfile, struct section_offsets *new_offsets,
- struct section_offsets *delta)
+dw2_relocate (struct objfile *objfile,
+ const struct section_offsets *new_offsets,
+ const struct section_offsets *delta)
{
/* There's nothing to relocate here. */
}
}
}
-/* 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;
- const char *filename;
-
- dw2_setup (objfile);
-
- /* index_table is NULL if OBJF_READNOW. */
- if (!dwarf2_per_objfile->index_table)
- {
- struct symtab *s;
-
- 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)
- {
- /* Only file extension of returned filename is recognized. */
- return SYMBOL_SYMTAB (sym)->filename;
- }
- }
- return NULL;
- }
-
- if (!find_slot_in_mapped_hash (dwarf2_per_objfile->index_table,
- name, &vec))
- return NULL;
-
- /* Note that this just looks at the very first one named NAME -- but
- actually we are looking for a function. find_main_filename
- 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 (GDB_INDEX_CU_VALUE (MAYBE_SWAP (vec[1])));
-
- if (per_cu->v.quick->symtab != NULL)
- {
- /* Only file extension of returned filename is recognized. */
- return per_cu->v.quick->symtab->filename;
- }
-
- init_cutu_and_read_dies (per_cu, NULL, 0, 0,
- dw2_get_primary_filename_reader, &filename);
-
- /* Only file extension of returned filename is recognized. */
- return filename;
-}
-
static void
-dw2_map_matching_symbols (const char * name, domain_enum namespace,
- struct objfile *objfile, int global,
+dw2_map_matching_symbols (struct objfile *objfile,
+ const char * name, domain_enum namespace,
+ int global,
int (*callback) (struct block *,
struct symbol *, void *),
void *data, symbol_compare_ftype *match,
static void
dw2_expand_symtabs_matching
(struct objfile *objfile,
- int (*file_matcher) (const char *, void *, int basenames),
- int (*name_matcher) (const char *, void *),
+ expand_symtabs_file_matcher_ftype *file_matcher,
+ expand_symtabs_symbol_matcher_ftype *symbol_matcher,
enum search_domain kind,
void *data)
{
offset_type idx = 2 * iter;
const char *name;
offset_type *vec, vec_len, vec_idx;
+ int global_seen = 0;
if (index->symbol_table[idx] == 0 && index->symbol_table[idx + 1] == 0)
continue;
name = index->constant_pool + MAYBE_SWAP (index->symbol_table[idx]);
- if (! (*name_matcher) (name, data))
+ if (! (*symbol_matcher) (name, data))
continue;
/* The name was matched, now expand corresponding CUs that were
{
struct dwarf2_per_cu_data *per_cu;
offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]);
+ /* 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);
int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs);
+ /* Only check the symbol attributes if they're present.
+ Indices prior to version 7 don't record them,
+ and indices >= 7 may elide them for certain symbols
+ (gold does this). */
+ int attrs_valid =
+ (index->version >= 7
+ && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE);
+
+ /* Work around gold/15646. */
+ if (attrs_valid)
+ {
+ if (!is_static && global_seen)
+ continue;
+ if (!is_static)
+ global_seen = 1;
+ }
- /* 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)
+ /* Only check the symbol's kind if it has one. */
+ if (attrs_valid)
{
switch (kind)
{
}
}
+ /* Don't crash on bad data. */
+ if (cu_index >= (dwarf2_per_objfile->n_comp_units
+ + dwarf2_per_objfile->n_type_units))
+ {
+ complaint (&symfile_complaints,
+ _(".gdb_index entry has bad CU index"
+ " [in module %s]"), objfile_name (objfile));
+ continue;
+ }
+
per_cu = dw2_get_cu (cu_index);
if (file_matcher == NULL || per_cu->v.quick->mark)
dw2_instantiate_symtab (per_cu);
dw2_expand_symtabs_for_function,
dw2_expand_all_symtabs,
dw2_expand_symtabs_with_fullname,
- dw2_find_symbol_file,
dw2_map_matching_symbols,
dw2_expand_symtabs_matching,
dw2_find_pc_sect_symtab,
NOTE: This leaves members offset, first_die_offset to be filled in
by the caller. */
-static gdb_byte *
+static const gdb_byte *
read_comp_unit_head (struct comp_unit_head *cu_header,
- gdb_byte *info_ptr, bfd *abfd)
+ const gdb_byte *info_ptr, bfd *abfd)
{
int signed_addr;
unsigned int bytes_read;
struct dwarf2_section_info *section,
struct dwarf2_section_info *abbrev_section)
{
- bfd *abfd = section->asection->owner;
- const char *filename = bfd_get_filename (abfd);
+ bfd *abfd = get_section_bfd_owner (section);
+ const char *filename = get_section_file_name (section);
if (header->version != 2 && header->version != 3 && header->version != 4)
error (_("Dwarf Error: wrong version in compilation unit header "
The contents of the header are stored in HEADER.
The result is a pointer to the start of the first DIE. */
-static gdb_byte *
+static const 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,
+ const gdb_byte *info_ptr,
int is_debug_types_section)
{
- gdb_byte *beg_of_comp_unit = info_ptr;
- bfd *abfd = section->asection->owner;
+ const gdb_byte *beg_of_comp_unit = info_ptr;
+ bfd *abfd = get_section_bfd_owner (section);
header->offset.sect_off = beg_of_comp_unit - section->buffer;
/* Read in the types comp unit header information from .debug_types entry at
types_ptr. The result is a pointer to one past the end of the header. */
-static gdb_byte *
+static const 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,
+ const gdb_byte *info_ptr,
ULONGEST *signature,
cu_offset *type_offset_in_tu)
{
- gdb_byte *beg_of_comp_unit = info_ptr;
- bfd *abfd = section->asection->owner;
+ const gdb_byte *beg_of_comp_unit = info_ptr;
+ bfd *abfd = get_section_bfd_owner (section);
header->offset.sect_off = beg_of_comp_unit - section->buffer;
read_abbrev_offset (struct dwarf2_section_info *section,
sect_offset offset)
{
- bfd *abfd = section->asection->owner;
- gdb_byte *info_ptr;
+ bfd *abfd = get_section_bfd_owner (section);
+ const gdb_byte *info_ptr;
unsigned int length, initial_length_size, offset_size;
sect_offset abbrev_offset;
partial symtab as being an include of PST. */
static void
-dwarf2_create_include_psymtab (char *name, struct partial_symtab *pst,
+dwarf2_create_include_psymtab (const char *name, struct partial_symtab *pst,
struct objfile *objfile)
{
struct partial_symtab *subpst = allocate_psymtab (name, objfile);
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));
+ get_section_file_name (abbrev_section));
for (ix = 0;
VEC_iterate (dwarf2_section_info_def, types, ix, section);
++ix)
{
bfd *abfd;
- gdb_byte *info_ptr, *end_ptr;
- struct dwarf2_section_info *abbrev_section;
+ const gdb_byte *info_ptr, *end_ptr;
dwarf2_read_section (objfile, section);
info_ptr = section->buffer;
continue;
/* 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 (dwo_file)
- abbrev_section = &dwo_file->sections.abbrev;
- else
- abbrev_section = &dwarf2_per_objfile->abbrev;
+ not present, in which case the bfd is unknown. */
+ abfd = get_section_bfd_owner (section);
/* 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
struct signatured_type *sig_type;
struct dwo_unit *dwo_tu;
void **slot;
- gdb_byte *ptr = info_ptr;
+ const gdb_byte *ptr = info_ptr;
struct comp_unit_head header;
unsigned int length;
complaint (&symfile_complaints,
_("debug type entry at offset 0x%x is duplicate to"
- " the entry at offset 0x%x, signature 0x%s"),
+ " the entry at offset 0x%x, signature %s"),
offset.sect_off, dup_offset.sect_off,
- phex (signature, sizeof (signature)));
+ hex_string (signature));
}
*slot = dwo_file ? (void *) dwo_tu : (void *) sig_type;
- if (dwarf2_read_debug)
- fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature 0x%s\n",
+ if (dwarf2_read_debug > 1)
+ fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature %s\n",
offset.sect_off,
- phex (signature, sizeof (signature)));
+ hex_string (signature));
info_ptr += length;
}
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 signatured_type *));
+ = xmalloc (dwarf2_per_objfile->n_type_units
+ * 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]
return 1;
}
+/* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
+ Fill in SIG_ENTRY with DWO_ENTRY. */
+
+static void
+fill_in_sig_entry_from_dwo_entry (struct objfile *objfile,
+ struct signatured_type *sig_entry,
+ struct dwo_unit *dwo_entry)
+{
+ /* Make sure we're not clobbering something we don't expect to. */
+ gdb_assert (! sig_entry->per_cu.queued);
+ gdb_assert (sig_entry->per_cu.cu == NULL);
+ gdb_assert (sig_entry->per_cu.v.quick != NULL);
+ gdb_assert (sig_entry->per_cu.v.quick->symtab == NULL);
+ gdb_assert (sig_entry->signature == dwo_entry->signature);
+ gdb_assert (sig_entry->type_offset_in_section.sect_off == 0);
+ gdb_assert (sig_entry->type_unit_group == NULL);
+ gdb_assert (sig_entry->dwo_unit == NULL);
+
+ sig_entry->per_cu.section = dwo_entry->section;
+ sig_entry->per_cu.offset = dwo_entry->offset;
+ sig_entry->per_cu.length = dwo_entry->length;
+ sig_entry->per_cu.reading_dwo_directly = 1;
+ sig_entry->per_cu.objfile = objfile;
+ sig_entry->type_offset_in_tu = dwo_entry->type_offset_in_tu;
+ sig_entry->dwo_unit = dwo_entry;
+}
+
+/* Subroutine of lookup_signatured_type.
+ If we haven't read the TU yet, create the signatured_type data structure
+ for a TU to be read in directly from a DWO file, bypassing the stub.
+ This is the "Stay in DWO Optimization": When there is no DWP file and we're
+ using .gdb_index, then when reading a CU we want to stay in the DWO file
+ containing that CU. Otherwise we could end up reading several other DWO
+ files (due to comdat folding) to process the transitive closure of all the
+ mentioned TUs, and that can be slow. The current DWO file will have every
+ type signature that it needs.
+ We only do this for .gdb_index because in the psymtab case we already have
+ to read all the DWOs to build the type unit groups. */
+
+static struct signatured_type *
+lookup_dwo_signatured_type (struct dwarf2_cu *cu, ULONGEST sig)
+{
+ struct objfile *objfile = dwarf2_per_objfile->objfile;
+ struct dwo_file *dwo_file;
+ struct dwo_unit find_dwo_entry, *dwo_entry;
+ struct signatured_type find_sig_entry, *sig_entry;
+
+ gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index);
+
+ /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
+ dwo_unit of the TU itself. */
+ dwo_file = cu->dwo_unit->dwo_file;
+
+ /* We only ever need to read in one copy of a signatured type.
+ Just use the global signatured_types array. If this is the first time
+ we're reading this type, replace the recorded data from .gdb_index with
+ this TU. */
+
+ if (dwarf2_per_objfile->signatured_types == NULL)
+ return NULL;
+ find_sig_entry.signature = sig;
+ sig_entry = htab_find (dwarf2_per_objfile->signatured_types, &find_sig_entry);
+ if (sig_entry == NULL)
+ return NULL;
+
+ /* We can get here with the TU already read, *or* in the process of being
+ read. Don't reassign it if that's the case. Also note that if the TU is
+ already being read, it may not have come from a DWO, the program may be
+ a mix of Fission-compiled code and non-Fission-compiled code. */
+ /* Have we already tried to read this TU? */
+ if (sig_entry->per_cu.tu_read)
+ return sig_entry;
+
+ /* Ok, this is the first time we're reading this TU. */
+ if (dwo_file->tus == NULL)
+ return NULL;
+ find_dwo_entry.signature = sig;
+ dwo_entry = htab_find (dwo_file->tus, &find_dwo_entry);
+ if (dwo_entry == NULL)
+ return NULL;
+
+ fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry);
+ sig_entry->per_cu.tu_read = 1;
+ return sig_entry;
+}
+
+/* Subroutine of lookup_dwp_signatured_type.
+ Add an entry for signature SIG to dwarf2_per_objfile->signatured_types. */
+
+static struct signatured_type *
+add_type_unit (ULONGEST sig)
+{
+ struct objfile *objfile = dwarf2_per_objfile->objfile;
+ int n_type_units = dwarf2_per_objfile->n_type_units;
+ struct signatured_type *sig_type;
+ void **slot;
+
+ ++n_type_units;
+ dwarf2_per_objfile->all_type_units =
+ xrealloc (dwarf2_per_objfile->all_type_units,
+ n_type_units * sizeof (struct signatured_type *));
+ dwarf2_per_objfile->n_type_units = n_type_units;
+ sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack,
+ struct signatured_type);
+ dwarf2_per_objfile->all_type_units[n_type_units - 1] = sig_type;
+ sig_type->signature = sig;
+ sig_type->per_cu.is_debug_types = 1;
+ sig_type->per_cu.v.quick =
+ OBSTACK_ZALLOC (&objfile->objfile_obstack,
+ struct dwarf2_per_cu_quick_data);
+ slot = htab_find_slot (dwarf2_per_objfile->signatured_types,
+ sig_type, INSERT);
+ gdb_assert (*slot == NULL);
+ *slot = sig_type;
+ /* The rest of sig_type must be filled in by the caller. */
+ return sig_type;
+}
+
+/* Subroutine of lookup_signatured_type.
+ Look up the type for signature SIG, and if we can't find SIG in .gdb_index
+ then try the DWP file.
+ Normally this "can't happen", but if there's a bug in signature
+ generation and/or the DWP file is built incorrectly, it can happen.
+ Using the type directly from the DWP file means we don't have the stub
+ which has some useful attributes (e.g., DW_AT_comp_dir), but they're
+ not critical. [Eventually the stub may go away for type units anyway.] */
+
+static struct signatured_type *
+lookup_dwp_signatured_type (struct dwarf2_cu *cu, ULONGEST sig)
+{
+ struct objfile *objfile = dwarf2_per_objfile->objfile;
+ struct dwp_file *dwp_file = get_dwp_file ();
+ struct dwo_unit *dwo_entry;
+ struct signatured_type find_sig_entry, *sig_entry;
+
+ gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index);
+ gdb_assert (dwp_file != NULL);
+
+ if (dwarf2_per_objfile->signatured_types != NULL)
+ {
+ find_sig_entry.signature = sig;
+ sig_entry = htab_find (dwarf2_per_objfile->signatured_types,
+ &find_sig_entry);
+ if (sig_entry != NULL)
+ return sig_entry;
+ }
+
+ /* This is the "shouldn't happen" case.
+ Try the DWP file and hope for the best. */
+ if (dwp_file->tus == NULL)
+ return NULL;
+ dwo_entry = lookup_dwo_unit_in_dwp (dwp_file, NULL,
+ sig, 1 /* is_debug_types */);
+ if (dwo_entry == NULL)
+ return NULL;
+
+ sig_entry = add_type_unit (sig);
+ fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry);
+
+ /* The caller will signal a complaint if we return NULL.
+ Here we don't return NULL but we still want to complain. */
+ complaint (&symfile_complaints,
+ _("Bad type signature %s referenced by %s at 0x%x,"
+ " coping by using copy in DWP [in module %s]"),
+ hex_string (sig),
+ cu->per_cu->is_debug_types ? "TU" : "CU",
+ cu->per_cu->offset.sect_off,
+ objfile_name (objfile));
+
+ return sig_entry;
+}
+
/* Lookup a signature based type for DW_FORM_ref_sig8.
Returns NULL if signature SIG is not present in the table.
It is up to the caller to complain about this. */
static struct signatured_type *
-lookup_signatured_type (ULONGEST sig)
+lookup_signatured_type (struct dwarf2_cu *cu, ULONGEST sig)
{
- struct signatured_type find_entry, *entry;
+ if (cu->dwo_unit
+ && dwarf2_per_objfile->using_index)
+ {
+ /* We're in a DWO/DWP file, and we're using .gdb_index.
+ These cases require special processing. */
+ if (get_dwp_file () == NULL)
+ return lookup_dwo_signatured_type (cu, sig);
+ else
+ return lookup_dwp_signatured_type (cu, sig);
+ }
+ else
+ {
+ struct signatured_type find_entry, *entry;
- if (dwarf2_per_objfile->signatured_types == NULL)
- return NULL;
- find_entry.signature = sig;
- entry = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
- return entry;
+ if (dwarf2_per_objfile->signatured_types == NULL)
+ return NULL;
+ find_entry.signature = sig;
+ entry = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
+ return entry;
+ }
}
\f
/* Low level DIE reading support. */
struct dwo_file *dwo_file)
{
gdb_assert (section->readin && section->buffer != NULL);
- reader->abfd = section->asection->owner;
+ reader->abfd = get_section_bfd_owner (section);
reader->cu = cu;
reader->dwo_file = dwo_file;
reader->die_section = section;
reader->buffer = section->buffer;
reader->buffer_end = section->buffer + section->size;
-}
-
-/* Initialize a CU (or TU) and read its DIEs.
- If the CU defers to a DWO file, read the DWO file as well.
-
- 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.
-
- 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.
-
- WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
- linker) then DIE_READER_FUNC will not get called. */
+ reader->comp_dir = NULL;
+}
+
+/* Subroutine of init_cutu_and_read_dies to simplify it.
+ Read in the rest of a CU/TU top level DIE from DWO_UNIT.
+ There's just a lot of work to do, and init_cutu_and_read_dies is big enough
+ already.
+
+ STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
+ from it to the DIE in the DWO. If NULL we are skipping the stub.
+ STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
+ from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
+ attribute of the referencing CU. Exactly one of STUB_COMP_UNIT_DIE and
+ COMP_DIR must be non-NULL.
+ *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
+ are filled in with the info of the DIE from the DWO file.
+ ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies
+ provided an abbrev table to use.
+ The result is non-zero if a valid (non-dummy) DIE was found. */
-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 int
+read_cutu_die_from_dwo (struct dwarf2_per_cu_data *this_cu,
+ struct dwo_unit *dwo_unit,
+ int abbrev_table_provided,
+ struct die_info *stub_comp_unit_die,
+ const char *stub_comp_dir,
+ struct die_reader_specs *result_reader,
+ const gdb_byte **result_info_ptr,
+ struct die_info **result_comp_unit_die,
+ int *result_has_children)
{
struct objfile *objfile = dwarf2_per_objfile->objfile;
- struct dwarf2_section_info *section = this_cu->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;
+ struct dwarf2_cu *cu = this_cu->cu;
+ struct dwarf2_section_info *section;
+ bfd *abfd;
+ const gdb_byte *begin_info_ptr, *info_ptr;
+ const char *comp_dir_string;
+ 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;
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);
+ struct attribute comp_dir_attr;
+ struct die_info *comp_unit_die;
- if (use_existing_cu)
- gdb_assert (keep);
+ /* Both can't be provided. */
+ gdb_assert (! (stub_comp_unit_die && stub_comp_dir));
- cleanups = make_cleanup (null_cleanup, NULL);
+ /* 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. */
- /* This is cheap if the section is already read in. */
- dwarf2_read_section (objfile, section);
+ stmt_list = NULL;
+ low_pc = NULL;
+ high_pc = NULL;
+ ranges = NULL;
+ comp_dir = NULL;
- begin_info_ptr = info_ptr = section->buffer + this_cu->offset.sect_off;
+ if (stub_comp_unit_die != NULL)
+ {
+ /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
+ DWO file. */
+ if (! this_cu->is_debug_types)
+ stmt_list = dwarf2_attr (stub_comp_unit_die, DW_AT_stmt_list, cu);
+ low_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_low_pc, cu);
+ high_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_high_pc, cu);
+ ranges = dwarf2_attr (stub_comp_unit_die, DW_AT_ranges, cu);
+ comp_dir = dwarf2_attr (stub_comp_unit_die, DW_AT_comp_dir, cu);
- abbrev_section = get_abbrev_section_for_cu (this_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 (stub_comp_unit_die, DW_AT_GNU_addr_base, cu);
+ if (attr)
+ cu->addr_base = DW_UNSND (attr);
- if (use_existing_cu && this_cu->cu != NULL)
+ /* 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 (stub_comp_unit_die, DW_AT_GNU_ranges_base, cu);
+ if (attr)
+ cu->ranges_base = DW_UNSND (attr);
+ }
+ else if (stub_comp_dir != NULL)
{
- cu = this_cu->cu;
+ /* Reconstruct the comp_dir attribute to simplify the code below. */
+ comp_dir = (struct attribute *)
+ obstack_alloc (&cu->comp_unit_obstack, sizeof (*comp_dir));
+ comp_dir->name = DW_AT_comp_dir;
+ comp_dir->form = DW_FORM_string;
+ DW_STRING_IS_CANONICAL (comp_dir) = 0;
+ DW_STRING (comp_dir) = stub_comp_dir;
+ }
- /* If this CU is from a DWO file we need to start over, we need to
+ /* Set up for reading the DWO CU/TU. */
+ cu->dwo_unit = dwo_unit;
+ section = dwo_unit->section;
+ dwarf2_read_section (objfile, section);
+ abfd = get_section_bfd_owner (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 (result_reader, cu, section, dwo_unit->dwo_file);
+
+ if (this_cu->is_debug_types)
+ {
+ ULONGEST header_signature;
+ cu_offset type_offset_in_tu;
+ struct signatured_type *sig_type = (struct signatured_type *) this_cu;
+
+ info_ptr = read_and_check_type_unit_head (&cu->header, section,
+ dwo_abbrev_section,
+ info_ptr,
+ &header_signature,
+ &type_offset_in_tu);
+ /* This is not an assert because it can be caused by bad debug info. */
+ if (sig_type->signature != header_signature)
+ {
+ error (_("Dwarf Error: signature mismatch %s vs %s while reading"
+ " TU at offset 0x%x [in module %s]"),
+ hex_string (sig_type->signature),
+ hex_string (header_signature),
+ dwo_unit->offset.sect_off,
+ bfd_get_filename (abfd));
+ }
+ gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off);
+ /* For DWOs coming from DWP files, we don't know the CU length
+ nor the type's offset in the TU until now. */
+ dwo_unit->length = get_cu_length (&cu->header);
+ dwo_unit->type_offset_in_tu = type_offset_in_tu;
+
+ /* 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);
+ /* For DWOs coming from DWP files, we don't know the CU length
+ until now. */
+ dwo_unit->length = get_cu_length (&cu->header);
+ }
+
+ /* Replace the CU's original abbrev table with the DWO's.
+ Reminder: We can't read the abbrev table until we've read the header. */
+ if (abbrev_table_provided)
+ {
+ /* Don't free the provided abbrev table, the caller of
+ init_cutu_and_read_dies owns it. */
+ dwarf2_read_abbrevs (cu, dwo_abbrev_section);
+ /* Ensure the DWO abbrev table gets freed. */
+ make_cleanup (dwarf2_free_abbrev_table, cu);
+ }
+ else
+ {
+ dwarf2_free_abbrev_table (cu);
+ dwarf2_read_abbrevs (cu, dwo_abbrev_section);
+ /* Leave any existing abbrev table cleanup as is. */
+ }
+
+ /* 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 work to maintain the illusion of a single
+ DW_TAG_{compile,type}_unit DIE 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 (result_reader, result_comp_unit_die, info_ptr,
+ result_has_children, num_extra_attrs);
+
+ /* Copy over the attributes from the stub to the DIE we just read in. */
+ comp_unit_die = *result_comp_unit_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;
+
+ if (dwarf2_die_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog,
+ "Read die from %s@0x%x of %s:\n",
+ get_section_name (section),
+ (unsigned) (begin_info_ptr - section->buffer),
+ bfd_get_filename (abfd));
+ dump_die (comp_unit_die, dwarf2_die_debug);
+ }
+
+ /* Save the comp_dir attribute. If there is no DWP file then we'll read
+ TUs by skipping the stub and going directly to the entry in the DWO file.
+ However, skipping the stub means we won't get DW_AT_comp_dir, so we have
+ to get it via circuitous means. Blech. */
+ if (comp_dir != NULL)
+ result_reader->comp_dir = DW_STRING (comp_dir);
+
+ /* Skip dummy compilation units. */
+ if (info_ptr >= begin_info_ptr + dwo_unit->length
+ || peek_abbrev_code (abfd, info_ptr) == 0)
+ return 0;
+
+ *result_info_ptr = info_ptr;
+ return 1;
+}
+
+/* Subroutine of init_cutu_and_read_dies to simplify it.
+ Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
+ Returns NULL if the specified DWO unit cannot be found. */
+
+static struct dwo_unit *
+lookup_dwo_unit (struct dwarf2_per_cu_data *this_cu,
+ struct die_info *comp_unit_die)
+{
+ struct dwarf2_cu *cu = this_cu->cu;
+ struct attribute *attr;
+ ULONGEST signature;
+ struct dwo_unit *dwo_unit;
+ const char *comp_dir, *dwo_name;
+
+ gdb_assert (cu != NULL);
+
+ /* Yeah, we look dwo_name up again, but it simplifies the code. */
+ attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu);
+ gdb_assert (attr != NULL);
+ dwo_name = DW_STRING (attr);
+ comp_dir = NULL;
+ attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, cu);
+ if (attr)
+ comp_dir = DW_STRING (attr);
+
+ if (this_cu->is_debug_types)
+ {
+ struct signatured_type *sig_type;
+
+ /* Since this_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;
+ signature = sig_type->signature;
+ dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir);
+ }
+ else
+ {
+ struct attribute *attr;
+
+ attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu);
+ if (! attr)
+ error (_("Dwarf Error: missing dwo_id for dwo_name %s"
+ " [in module %s]"),
+ dwo_name, objfile_name (this_cu->objfile));
+ signature = DW_UNSND (attr);
+ dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir,
+ signature);
+ }
+
+ return dwo_unit;
+}
+
+/* Subroutine of init_cutu_and_read_dies to simplify it.
+ Read a TU directly from a DWO file, bypassing the stub. */
+
+static void
+init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data *this_cu, int keep,
+ die_reader_func_ftype *die_reader_func,
+ void *data)
+{
+ struct dwarf2_cu *cu;
+ struct signatured_type *sig_type;
+ struct cleanup *cleanups, *free_cu_cleanup;
+ struct die_reader_specs reader;
+ const gdb_byte *info_ptr;
+ struct die_info *comp_unit_die;
+ int has_children;
+
+ /* Verify we can do the following downcast, and that we have the
+ data we need. */
+ gdb_assert (this_cu->is_debug_types && this_cu->reading_dwo_directly);
+ sig_type = (struct signatured_type *) this_cu;
+ gdb_assert (sig_type->dwo_unit != NULL);
+
+ cleanups = make_cleanup (null_cleanup, NULL);
+
+ gdb_assert (this_cu->cu == NULL);
+ cu = xmalloc (sizeof (*cu));
+ init_one_comp_unit (cu, this_cu);
+ /* If an error occurs while loading, release our storage. */
+ free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu);
+
+ if (read_cutu_die_from_dwo (this_cu, sig_type->dwo_unit,
+ 0 /* abbrev_table_provided */,
+ NULL /* stub_comp_unit_die */,
+ sig_type->dwo_unit->dwo_file->comp_dir,
+ &reader, &info_ptr,
+ &comp_unit_die, &has_children) == 0)
+ {
+ /* Dummy die. */
+ do_cleanups (cleanups);
+ return;
+ }
+
+ /* All the "real" work is done here. */
+ die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data);
+
+ /* This duplicates some code in init_cutu_and_read_dies,
+ but the alternative is making the latter more complex.
+ This function is only for the special case of using DWO files directly:
+ no point in overly complicating the general case just to handle this. */
+ if (keep)
+ {
+ /* We've successfully allocated this compilation unit. Let our
+ caller clean it up when finished with it. */
+ discard_cleanups (free_cu_cleanup);
+
+ /* We can only discard free_cu_cleanup and all subsequent cleanups.
+ So we have to manually free the abbrev table. */
+ dwarf2_free_abbrev_table (cu);
+
+ /* Link this CU into read_in_chain. */
+ this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
+ dwarf2_per_objfile->read_in_chain = this_cu;
+ }
+ else
+ do_cleanups (free_cu_cleanup);
+
+ do_cleanups (cleanups);
+}
+
+/* Initialize a CU (or TU) and read its DIEs.
+ If the CU defers to a DWO file, read the DWO file as well.
+
+ 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.
+
+ 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.
+
+ WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
+ linker) then DIE_READER_FUNC will not get called. */
+
+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)
+{
+ struct objfile *objfile = dwarf2_per_objfile->objfile;
+ struct dwarf2_section_info *section = this_cu->section;
+ bfd *abfd = get_section_bfd_owner (section);
+ struct dwarf2_cu *cu;
+ const gdb_byte *begin_info_ptr, *info_ptr;
+ struct die_reader_specs reader;
+ struct die_info *comp_unit_die;
+ int has_children;
+ 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 (this only applies to CUs, not TUs). */
+ 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 we're reading a TU directly from a DWO file, including a virtual DWO
+ file (instead of going through the stub), short-circuit all of this. */
+ if (this_cu->reading_dwo_directly)
+ {
+ /* Narrow down the scope of possibilities to have to understand. */
+ gdb_assert (this_cu->is_debug_types);
+ gdb_assert (abbrev_table == NULL);
+ gdb_assert (!use_existing_cu);
+ init_tu_and_read_dwo_dies (this_cu, keep, die_reader_func, data);
+ return;
+ }
+
+ cleanups = make_cleanup (null_cleanup, NULL);
+
+ /* This is cheap if the section is already read in. */
+ dwarf2_read_section (objfile, section);
+
+ 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;
+
+ /* 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
free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu);
}
+ /* Get the header. */
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. */
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. */
+ /* If we are in a DWO stub, process it and then read in the "real" CU/TU
+ from the DWO file.
+ Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
+ DWO CU, that this test will fail (the attribute will not be present). */
attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu);
if (attr)
{
- const 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;
+ struct die_info *dwo_comp_unit_die;
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->section;
- dwarf2_read_section (objfile, 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;
- cu_offset type_offset_in_tu;
-
- info_ptr = read_and_check_type_unit_head (&cu->header, section,
- dwo_abbrev_section,
- info_ptr,
- &signature,
- &type_offset_in_tu);
- gdb_assert (sig_type->signature == signature);
- gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off);
- /* For DWOs coming from DWP files, we don't know the CU length
- nor the type's offset in the TU until now. */
- dwo_unit->length = get_cu_length (&cu->header);
- dwo_unit->type_offset_in_tu = type_offset_in_tu;
-
- /* 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);
- /* For DWOs coming from DWP files, we don't know the CU length
- until now. */
- dwo_unit->length = get_cu_length (&cu->header);
+ complaint (&symfile_complaints,
+ _("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));
}
-
- /* Discard the original CU's abbrev table, and read the DWO's. */
- if (abbrev_table == NULL)
+ dwo_unit = lookup_dwo_unit (this_cu, comp_unit_die);
+ if (dwo_unit != NULL)
{
- dwarf2_free_abbrev_table (cu);
- dwarf2_read_abbrevs (cu, dwo_abbrev_section);
+ if (read_cutu_die_from_dwo (this_cu, dwo_unit,
+ abbrev_table != NULL,
+ comp_unit_die, NULL,
+ &reader, &info_ptr,
+ &dwo_comp_unit_die, &has_children) == 0)
+ {
+ /* Dummy die. */
+ do_cleanups (cleanups);
+ return;
+ }
+ comp_unit_die = dwo_comp_unit_die;
}
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;
+ /* Yikes, we couldn't find the rest of the DIE, we only have
+ the stub. A complaint has already been logged. There's
+ not much more we can do except pass on the stub DIE to
+ die_reader_func. We don't want to throw an error on bad
+ debug info. */
}
}
+ /* All of the above is setup for this call. Yikes. */
die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data);
+ /* Done, clean up. */
if (free_cu_cleanup != NULL)
{
if (keep)
{
struct objfile *objfile = dwarf2_per_objfile->objfile;
struct dwarf2_section_info *section = this_cu->section;
- bfd *abfd = section->asection->owner;
+ bfd *abfd = get_section_bfd_owner (section);
struct dwarf2_cu cu;
- gdb_byte *begin_info_ptr, *info_ptr;
+ const gdb_byte *begin_info_ptr, *info_ptr;
struct die_reader_specs reader;
struct cleanup *cleanups;
struct die_info *comp_unit_die;
struct type_unit_group);
per_cu = &tu_group->per_cu;
per_cu->objfile = objfile;
- per_cu->is_debug_types = 1;
- per_cu->type_unit_group = tu_group;
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
{
STMT_LIST is a DW_AT_stmt_list attribute. */
static struct type_unit_group *
-get_type_unit_group (struct dwarf2_cu *cu, struct attribute *stmt_list)
+get_type_unit_group (struct dwarf2_cu *cu, const struct attribute *stmt_list)
{
struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats;
struct type_unit_group *tu_group;
func, data);
}
+ /* type_unit_groups can be NULL if there is an error in the debug info.
+ Just create an empty table so the rest of gdb doesn't have to watch
+ for this error case. */
+ if (dwarf2_per_objfile->type_unit_groups == NULL)
+ {
+ dwarf2_per_objfile->type_unit_groups =
+ allocate_type_unit_groups_table ();
+ dwarf2_per_objfile->n_type_unit_groups = 0;
+ }
+
/* 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 =
return pst;
}
+/* The DATA object passed to process_psymtab_comp_unit_reader has this
+ type. */
+
+struct process_psymtab_comp_unit_data
+{
+ /* True if we are reading a DW_TAG_partial_unit. */
+
+ int want_partial_unit;
+
+ /* The "pretend" language that is used if the CU doesn't declare a
+ language. */
+
+ enum language pretend_language;
+};
+
/* die_reader_func for process_psymtab_comp_unit. */
static void
process_psymtab_comp_unit_reader (const struct die_reader_specs *reader,
- gdb_byte *info_ptr,
+ const gdb_byte *info_ptr,
struct die_info *comp_unit_die,
int has_children,
void *data)
struct partial_symtab *pst;
int has_pc_info;
const char *filename;
- int *want_partial_unit_ptr = data;
+ struct process_psymtab_comp_unit_data *info = data;
- if (comp_unit_die->tag == DW_TAG_partial_unit
- && (want_partial_unit_ptr == NULL
- || !*want_partial_unit_ptr))
+ if (comp_unit_die->tag == DW_TAG_partial_unit && !info->want_partial_unit)
return;
gdb_assert (! per_cu->is_debug_types);
- prepare_one_comp_unit (cu, comp_unit_die, language_minimal);
+ prepare_one_comp_unit (cu, comp_unit_die, info->pretend_language);
cu->list_in_scope = &file_symbols;
static void
process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu,
- int want_partial_unit)
+ int want_partial_unit,
+ enum language pretend_language)
{
+ struct process_psymtab_comp_unit_data info;
+
/* 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
free_one_cached_comp_unit (this_cu);
gdb_assert (! this_cu->is_debug_types);
+ info.want_partial_unit = want_partial_unit;
+ info.pretend_language = pretend_language;
init_cutu_and_read_dies (this_cu, NULL, 0, 0,
process_psymtab_comp_unit_reader,
- &want_partial_unit);
+ &info);
/* Age out any secondary CUs. */
age_cached_comp_units ();
static void
build_type_psymtabs_reader (const struct die_reader_specs *reader,
- gdb_byte *info_ptr,
+ const 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 signatured_type *sig_type;
struct type_unit_group *tu_group;
struct attribute *attr;
struct partial_die_info *first_die;
struct partial_symtab *pst;
gdb_assert (data == NULL);
+ gdb_assert (per_cu->is_debug_types);
+ sig_type = (struct signatured_type *) per_cu;
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);
+ VEC_safe_push (sig_type_ptr, tu_group->tus, sig_type);
prepare_one_comp_unit (cu, type_unit_die, language_minimal);
cu->list_in_scope = &file_symbols;
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 len = VEC_length (sig_type_ptr, tu_group->tus);
+ struct signatured_type *iter;
int i;
gdb_assert (len > 0);
+ gdb_assert (IS_TYPE_UNIT_GROUP (per_cu));
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);
+ VEC_iterate (sig_type_ptr, tu_group->tus, i, iter);
++i)
{
- pst->dependencies[i] = iter->v.psymtab;
+ gdb_assert (iter->per_cu.is_debug_types);
+ pst->dependencies[i] = iter->per_cu.v.psymtab;
iter->type_unit_group = tu_group;
}
- VEC_free (dwarf2_per_cu_ptr, tu_group->t.tus);
+ VEC_free (sig_type_ptr, tu_group->tus);
return 1;
}
if (dwarf2_read_debug)
{
fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n",
- objfile->name);
+ objfile_name (objfile));
}
dwarf2_per_objfile->reading_partial_symbols = 1;
{
struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
- process_psymtab_comp_unit (per_cu, 0);
+ process_psymtab_comp_unit (per_cu, 0, language_minimal);
}
set_partial_user (objfile);
if (dwarf2_read_debug)
fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n",
- objfile->name);
+ objfile_name (objfile));
}
/* 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,
+ const gdb_byte *info_ptr,
struct die_info *comp_unit_die,
int has_children,
void *data)
int *n_comp_units,
struct dwarf2_per_cu_data ***all_comp_units)
{
- gdb_byte *info_ptr;
- bfd *abfd = section->asection->owner;
+ const gdb_byte *info_ptr;
+ bfd *abfd = get_section_bfd_owner (section);
+
+ if (dwarf2_read_debug)
+ fprintf_unfiltered (gdb_stdlog, "Reading %s for %s\n",
+ get_section_name (section),
+ get_section_file_name (section));
dwarf2_read_section (objfile, section);
int n_allocated;
int n_comp_units;
struct dwarf2_per_cu_data **all_comp_units;
+ struct dwz_file *dwz;
n_comp_units = 0;
n_allocated = 10;
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);
- }
+ dwz = dwarf2_get_dwz_file ();
+ if (dwz != NULL)
+ 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,
{
error (_("Dwarf Error: DW_TAG_imported_unit is not"
" supported in type units [in module %s]"),
- cu->objfile->name);
+ objfile_name (cu->objfile));
}
per_cu = dwarf2_find_containing_comp_unit (pdi->d.offset,
/* Go read the partial unit, if needed. */
if (per_cu->v.psymtab == NULL)
- process_psymtab_comp_unit (per_cu, 1);
+ process_psymtab_comp_unit (per_cu, 1, cu->language);
VEC_safe_push (dwarf2_per_cu_ptr,
cu->per_cu->imported_symtabs, per_cu);
}
break;
+ case DW_TAG_imported_declaration:
+ add_partial_symbol (pdi, cu);
+ break;
default:
break;
}
&objfile->static_psymbols,
0, (CORE_ADDR) 0, cu->language, objfile);
break;
+ case DW_TAG_imported_declaration:
case DW_TAG_namespace:
add_psymbol_to_list (actual_name, strlen (actual_name),
built_actual_name != NULL,
&objfile->global_psymbols,
0, (CORE_ADDR) 0, cu->language, objfile);
break;
+ case DW_TAG_module:
+ add_psymbol_to_list (actual_name, strlen (actual_name),
+ built_actual_name != NULL,
+ MODULE_DOMAIN, LOC_TYPEDEF,
+ &objfile->global_psymbols,
+ 0, (CORE_ADDR) 0, cu->language, objfile);
+ break;
case DW_TAG_class_type:
case DW_TAG_interface_type:
case DW_TAG_structure_type:
add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
{
+ /* Add a symbol for the namespace. */
+
+ add_partial_symbol (pdi, cu);
+
/* Now scan partial symbols in that module. */
if (pdi->has_children)
/* Return the initial uleb128 in the die at INFO_PTR. */
static unsigned int
-peek_abbrev_code (bfd *abfd, gdb_byte *info_ptr)
+peek_abbrev_code (bfd *abfd, const gdb_byte *info_ptr)
{
unsigned int bytes_read;
the initial number. */
static struct abbrev_info *
-peek_die_abbrev (gdb_byte *info_ptr, unsigned int *bytes_read,
+peek_die_abbrev (const gdb_byte *info_ptr, unsigned int *bytes_read,
struct dwarf2_cu *cu)
{
bfd *abfd = cu->objfile->obfd;
Returns a pointer to the end of a series of DIEs, terminated by an empty
DIE. Any children of the skipped DIEs will also be skipped. */
-static gdb_byte *
-skip_children (const struct die_reader_specs *reader, gdb_byte *info_ptr)
+static const gdb_byte *
+skip_children (const struct die_reader_specs *reader, const gdb_byte *info_ptr)
{
struct dwarf2_cu *cu = reader->cu;
struct abbrev_info *abbrev;
ABBREV. Returns a pointer to this DIE's sibling, skipping any
children. */
-static gdb_byte *
-skip_one_die (const struct die_reader_specs *reader, gdb_byte *info_ptr,
+static const gdb_byte *
+skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr,
struct abbrev_info *abbrev)
{
unsigned int bytes_read;
struct attribute attr;
bfd *abfd = reader->abfd;
struct dwarf2_cu *cu = reader->cu;
- gdb_byte *buffer = reader->buffer;
+ const gdb_byte *buffer = reader->buffer;
const gdb_byte *buffer_end = reader->buffer_end;
- gdb_byte *start_info_ptr = info_ptr;
+ const gdb_byte *start_info_ptr = info_ptr;
unsigned int form, i;
for (i = 0; i < abbrev->num_attrs; i++)
complaint (&symfile_complaints,
_("ignoring absolute DW_AT_sibling"));
else
- return buffer + dwarf2_get_ref_die_offset (&attr).sect_off;
+ {
+ unsigned int off = dwarf2_get_ref_die_offset (&attr).sect_off;
+ const gdb_byte *sibling_ptr = buffer + off;
+
+ if (sibling_ptr < info_ptr)
+ complaint (&symfile_complaints,
+ _("DW_AT_sibling points backwards"));
+ else
+ return sibling_ptr;
+ }
}
/* If it isn't DW_AT_sibling, skip this attribute. */
case DW_FORM_ref_udata:
case DW_FORM_GNU_addr_index:
case DW_FORM_GNU_str_index:
- info_ptr = (gdb_byte *) safe_skip_leb128 (info_ptr, buffer_end);
+ info_ptr = safe_skip_leb128 (info_ptr, buffer_end);
break;
case DW_FORM_indirect:
form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
/* Locate ORIG_PDI's sibling.
INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
-static gdb_byte *
+static const gdb_byte *
locate_pdi_sibling (const struct die_reader_specs *reader,
struct partial_die_info *orig_pdi,
- gdb_byte *info_ptr)
+ const gdb_byte *info_ptr)
{
/* Do we know the sibling already? */
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.
+/* If PER_CU is not yet queued, add it to the queue.
+ If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
+ dependency.
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. */
+ meaning either PER_CU is already queued or it is already loaded.
+
+ N.B. There is an invariant here that if a CU is queued then it is loaded.
+ The caller is required to load PER_CU if we return non-zero. */
static int
-maybe_queue_comp_unit (struct dwarf2_cu *this_cu,
+maybe_queue_comp_unit (struct dwarf2_cu *dependent_cu,
struct dwarf2_per_cu_data *per_cu,
enum language pretend_language)
{
/* Mark the dependence relation so that we don't flush PER_CU
too early. */
- dwarf2_add_dependence (this_cu, per_cu);
+ if (dependent_cu != NULL)
+ dwarf2_add_dependence (dependent_cu, per_cu);
/* If it's already on the queue, we have nothing to do. */
if (per_cu->queued)
{
fprintf_unfiltered (gdb_stdlog,
"Expanding one or more symtabs of objfile %s ...\n",
- dwarf2_per_objfile->objfile->name);
+ objfile_name (dwarf2_per_objfile->objfile));
}
/* The queue starts out with one item, but following a DIE reference
: (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin))
{
struct dwarf2_per_cu_data *per_cu = item->per_cu;
+ unsigned int debug_print_threshold;
+ char buf[100];
- if (dwarf2_read_debug)
+ if (per_cu->is_debug_types)
{
- 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);
+ struct signatured_type *sig_type =
+ (struct signatured_type *) per_cu;
+
+ sprintf (buf, "TU %s at offset 0x%x",
+ hex_string (sig_type->signature),
+ per_cu->offset.sect_off);
+ /* There can be 100s of TUs.
+ Only print them in verbose mode. */
+ debug_print_threshold = 2;
}
+ else
+ {
+ sprintf (buf, "CU at offset 0x%x", per_cu->offset.sect_off);
+ debug_print_threshold = 1;
+ }
+
+ if (dwarf2_read_debug >= debug_print_threshold)
+ fprintf_unfiltered (gdb_stdlog, "Expanding symtab of %s\n", buf);
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);
- }
+ if (dwarf2_read_debug >= debug_print_threshold)
+ fprintf_unfiltered (gdb_stdlog, "Done expanding %s\n", buf);
}
item->per_cu->queued = 0;
if (dwarf2_read_debug)
{
fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n",
- dwarf2_per_objfile->objfile->name);
+ objfile_name (dwarf2_per_objfile->objfile));
}
}
static void
load_full_comp_unit_reader (const struct die_reader_specs *reader,
- gdb_byte *info_ptr,
+ const gdb_byte *info_ptr,
struct die_info *comp_unit_die,
int has_children,
void *data)
_("Symtab %s has objects from two different Go packages: %s and %s"),
(SYMBOL_SYMTAB (sym)
? symtab_to_filename_for_display (SYMBOL_SYMTAB (sym))
- : cu->objfile->name),
+ : objfile_name (cu->objfile)),
this_package_name, package_name);
xfree (this_package_name);
}
TYPE_TAG_NAME (type) = TYPE_NAME (type);
- sym = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct symbol);
- SYMBOL_SET_LANGUAGE (sym, language_go);
+ sym = allocate_symbol (objfile);
+ SYMBOL_SET_LANGUAGE (sym, language_go, &objfile->objfile_obstack);
SYMBOL_SET_NAMES (sym, saved_package_name,
strlen (saved_package_name), 0, objfile);
/* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
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)
+recursively_compute_inclusions (VEC (symtab_ptr) **result,
+ htab_t all_children, htab_t all_type_symtabs,
+ struct dwarf2_per_cu_data *per_cu,
+ struct symtab *immediate_parent)
{
void **slot;
int ix;
+ struct symtab *symtab;
struct dwarf2_per_cu_data *iter;
slot = htab_find_slot (all_children, per_cu, INSERT);
*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);
+ symtab = get_symtab (per_cu);
+ if (symtab != NULL)
+ {
+ /* If this is a type unit only add its symbol table if we haven't
+ seen it yet (type unit per_cu's can share symtabs). */
+ if (per_cu->is_debug_types)
+ {
+ slot = htab_find_slot (all_type_symtabs, symtab, INSERT);
+ if (*slot == NULL)
+ {
+ *slot = symtab;
+ VEC_safe_push (symtab_ptr, *result, symtab);
+ if (symtab->user == NULL)
+ symtab->user = immediate_parent;
+ }
+ }
+ else
+ {
+ VEC_safe_push (symtab_ptr, *result, symtab);
+ if (symtab->user == NULL)
+ symtab->user = immediate_parent;
+ }
+ }
for (ix = 0;
VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, ix, iter);
++ix)
- recursively_compute_inclusions (result, all_children, iter);
+ {
+ recursively_compute_inclusions (result, all_children,
+ all_type_symtabs, iter, symtab);
+ }
}
/* Compute the symtab 'includes' fields for the symtab related to
if (!VEC_empty (dwarf2_per_cu_ptr, per_cu->imported_symtabs))
{
int ix, len;
- struct dwarf2_per_cu_data *iter;
- VEC (dwarf2_per_cu_ptr) *result_children = NULL;
- htab_t all_children;
+ struct dwarf2_per_cu_data *per_cu_iter;
+ struct symtab *symtab_iter;
+ VEC (symtab_ptr) *result_symtabs = NULL;
+ htab_t all_children, all_type_symtabs;
struct symtab *symtab = get_symtab (per_cu);
/* If we don't have a symtab, we can just skip this case. */
all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer,
NULL, xcalloc, xfree);
+ all_type_symtabs = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer,
+ NULL, xcalloc, xfree);
for (ix = 0;
VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs,
- ix, iter);
+ ix, per_cu_iter);
++ix)
- recursively_compute_inclusions (&result_children, all_children, iter);
+ {
+ recursively_compute_inclusions (&result_symtabs, all_children,
+ all_type_symtabs, per_cu_iter,
+ symtab);
+ }
- /* Now we have a transitive closure of all the included CUs, and
- for .gdb_index version 7 the included TUs, so we can convert it
- to a list of symtabs. */
- len = VEC_length (dwarf2_per_cu_ptr, result_children);
+ /* Now we have a transitive closure of all the included symtabs. */
+ len = VEC_length (symtab_ptr, result_symtabs);
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);
+ VEC_iterate (symtab_ptr, result_symtabs, ix, symtab_iter);
++ix)
- symtab->includes[ix] = get_symtab (iter);
+ symtab->includes[ix] = symtab_iter;
symtab->includes[len] = NULL;
- VEC_free (dwarf2_per_cu_ptr, result_children);
+ VEC_free (symtab_ptr, result_symtabs);
htab_delete (all_children);
+ htab_delete (all_type_symtabs);
}
}
get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu);
static_block
- = end_symtab_get_static_block (highpc + baseaddr, objfile, 0,
- per_cu->imported_symtabs != NULL);
+ = end_symtab_get_static_block (highpc + baseaddr, objfile, 0, 1);
/* 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
struct objfile *objfile = per_cu->objfile;
struct symtab *symtab;
struct cleanup *back_to, *delayed_list_cleanup;
+ struct signatured_type *sig_type;
+
+ gdb_assert (per_cu->is_debug_types);
+ sig_type = (struct signatured_type *) per_cu;
buildsym_init ();
back_to = make_cleanup (really_free_pendings, NULL);
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->type_unit_group->primary_symtab == NULL)
+ if (sig_type->type_unit_group->primary_symtab == NULL)
{
symtab = end_expandable_symtab (0, objfile, SECT_OFF_TEXT (objfile));
- per_cu->type_unit_group->primary_symtab = symtab;
+ sig_type->type_unit_group->primary_symtab = symtab;
if (symtab != NULL)
{
else
{
augment_type_symtab (objfile,
- per_cu->type_unit_group->primary_symtab);
- symtab = per_cu->type_unit_group->primary_symtab;
+ sig_type->type_unit_group->primary_symtab);
+ symtab = sig_type->type_unit_group->primary_symtab;
}
if (dwarf2_per_objfile->using_index)
{
error (_("Dwarf Error: DW_TAG_imported_unit is not"
" supported in type units [in module %s]"),
- cu->objfile->name);
+ objfile_name (cu->objfile));
}
attr = dwarf2_attr (die, DW_AT_import, cu);
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 necessary, add it to the queue and load its DIEs. */
if (maybe_queue_comp_unit (cu, per_cu, cu->language))
load_full_comp_unit (per_cu, cu->language);
read_module (die, cu);
break;
case DW_TAG_imported_declaration:
+ cu->processing_has_namespace_info = 1;
+ if (read_namespace_alias (die, cu))
+ break;
+ /* The declaration is not a global namespace alias: fall through. */
case DW_TAG_imported_module:
cu->processing_has_namespace_info = 1;
if (die->child != NULL && (die->tag == DW_TAG_imported_declaration
case DW_TAG_enumerator:
case DW_TAG_subprogram:
case DW_TAG_member:
+ case DW_TAG_imported_declaration:
return 1;
case DW_TAG_variable:
{
struct type *type;
LONGEST value;
- gdb_byte *bytes;
+ const gdb_byte *bytes;
struct dwarf2_locexpr_baton *baton;
struct value *v;
}
else
{
- demangled = cplus_demangle (mangled,
- (DMGL_PARAMS | DMGL_ANSI
- | (cu->language == language_java
- ? DMGL_JAVA | DMGL_RET_POSTFIX
- : DMGL_RET_DROP)));
+ demangled = gdb_demangle (mangled,
+ (DMGL_PARAMS | DMGL_ANSI
+ | (cu->language == language_java
+ ? DMGL_JAVA | DMGL_RET_POSTFIX
+ : DMGL_RET_DROP)));
}
if (demangled)
{
complaint (&symfile_complaints,
_("Computed physname <%s> does not match demangled <%s> "
"(from linkage <%s>) - DIE at 0x%x [in module %s]"),
- physname, canon, mangled, die->offset.sect_off, objfile->name);
+ physname, canon, mangled, die->offset.sect_off,
+ objfile_name (objfile));
/* Prefer DW_AT_linkage_name (in the CANON form) - when it
is available here - over computed PHYSNAME. It is safer
return retval;
}
+/* Inspect DIE in CU for a namespace alias. If one exists, record
+ a new symbol for it.
+
+ Returns 1 if a namespace alias was recorded, 0 otherwise. */
+
+static int
+read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct attribute *attr;
+
+ /* If the die does not have a name, this is not a namespace
+ alias. */
+ attr = dwarf2_attr (die, DW_AT_name, cu);
+ if (attr != NULL)
+ {
+ int num;
+ struct die_info *d = die;
+ struct dwarf2_cu *imported_cu = cu;
+
+ /* If the compiler has nested DW_AT_imported_declaration DIEs,
+ keep inspecting DIEs until we hit the underlying import. */
+#define MAX_NESTED_IMPORTED_DECLARATIONS 100
+ for (num = 0; num < MAX_NESTED_IMPORTED_DECLARATIONS; ++num)
+ {
+ attr = dwarf2_attr (d, DW_AT_import, cu);
+ if (attr == NULL)
+ break;
+
+ d = follow_die_ref (d, attr, &imported_cu);
+ if (d->tag != DW_TAG_imported_declaration)
+ break;
+ }
+
+ if (num == MAX_NESTED_IMPORTED_DECLARATIONS)
+ {
+ complaint (&symfile_complaints,
+ _("DIE at 0x%x has too many recursively imported "
+ "declarations"), d->offset.sect_off);
+ return 0;
+ }
+
+ if (attr != NULL)
+ {
+ struct type *type;
+ sect_offset offset = dwarf2_get_ref_die_offset (attr);
+
+ type = get_die_type_at_offset (offset, cu->per_cu);
+ if (type != NULL && TYPE_CODE (type) == TYPE_CODE_NAMESPACE)
+ {
+ /* This declaration is a global namespace alias. Add
+ a symbol for it whose type is the aliased namespace. */
+ new_symbol (die, type, cu);
+ return 1;
+ }
+ }
+ }
+
+ return 0;
+}
+
/* Read the import statement specified by the given die and record it. */
static void
complaint (&symfile_complaints,
_("child DW_TAG_imported_declaration expected "
"- DIE at 0x%x [in module %s]"),
- child_die->offset.sect_off, objfile->name);
+ child_die->offset.sect_off, objfile_name (objfile));
continue;
}
complaint (&symfile_complaints,
_("child DW_TAG_imported_declaration has unknown "
"imported name - DIE at 0x%x [in module %s]"),
- child_die->offset.sect_off, objfile->name);
+ child_die->offset.sect_off, objfile_name (objfile));
continue;
}
static void
handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu,
- const char *comp_dir)
+ const char *comp_dir) /* ARI: editCase function */
{
struct attribute *attr;
struct line_header *lh;
struct attribute *attr;
unsigned int i, line_offset;
+ struct signatured_type *sig_type;
gdb_assert (per_cu->is_debug_types);
+ sig_type = (struct signatured_type *) per_cu;
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->type_unit_group == NULL)
- per_cu->type_unit_group = get_type_unit_group (cu, attr);
- tu_group = per_cu->type_unit_group;
+ per_cu->type_unit_group may not have been set up yet. */
+ if (sig_type->type_unit_group == NULL)
+ sig_type->type_unit_group = get_type_unit_group (cu, attr);
+ tu_group = sig_type->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
for (i = 0; i < lh->num_file_names; ++i)
{
- char *dir = NULL;
+ const char *dir = NULL;
struct file_entry *fe = &lh->file_names[i];
if (fe->dir_index)
hash_dwo_file (const void *item)
{
const struct dwo_file *dwo_file = item;
+ hashval_t hash;
- return htab_hash_string (dwo_file->name);
+ hash = htab_hash_string (dwo_file->dwo_name);
+ if (dwo_file->comp_dir != NULL)
+ hash += htab_hash_string (dwo_file->comp_dir);
+ return hash;
}
static int
const struct dwo_file *lhs = item_lhs;
const struct dwo_file *rhs = item_rhs;
- return strcmp (lhs->name, rhs->name) == 0;
+ if (strcmp (lhs->dwo_name, rhs->dwo_name) != 0)
+ return 0;
+ if (lhs->comp_dir == NULL || rhs->comp_dir == NULL)
+ return lhs->comp_dir == rhs->comp_dir;
+ return strcmp (lhs->comp_dir, rhs->comp_dir) == 0;
}
/* Allocate a hash table for DWO files. */
/* Lookup DWO file DWO_NAME. */
static void **
-lookup_dwo_file_slot (const char *dwo_name)
+lookup_dwo_file_slot (const char *dwo_name, const char *comp_dir)
{
struct dwo_file find_entry;
void **slot;
dwarf2_per_objfile->dwo_files = allocate_dwo_file_hash_table ();
memset (&find_entry, 0, sizeof (find_entry));
- find_entry.name = dwo_name;
+ find_entry.dwo_name = dwo_name;
+ find_entry.comp_dir = comp_dir;
slot = htab_find_slot (dwarf2_per_objfile->dwo_files, &find_entry, INSERT);
return slot;
/* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
-struct create_dwo_info_table_data
+struct create_dwo_cu_data
{
struct dwo_file *dwo_file;
- htab_t cu_htab;
+ struct dwo_unit dwo_unit;
};
-/* die_reader_func for create_dwo_debug_info_hash_table. */
+/* die_reader_func for create_dwo_cu. */
static void
-create_dwo_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)
+create_dwo_cu_reader (const struct die_reader_specs *reader,
+ const 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->section;
- struct create_dwo_info_table_data *data = datap;
+ struct create_dwo_cu_data *data = datap;
struct dwo_file *dwo_file = data->dwo_file;
- htab_t cu_htab = data->cu_htab;
- void **slot;
+ struct dwo_unit *dwo_unit = &data->dwo_unit;
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->name);
+ complaint (&symfile_complaints,
+ _("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->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->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)));
+ fprintf_unfiltered (gdb_stdlog, " offset 0x%x, dwo_id %s\n",
+ offset.sect_off, hex_string (dwo_unit->signature));
}
-/* Create a hash table to map DWO IDs to their CU entry in
- .debug_info.dwo in DWO_FILE.
- Note: This function processes DWO files only, not DWP files.
- Note: A DWO file generally contains one CU, but we don't assume this. */
+/* Create the dwo_unit for the lone CU in DWO_FILE.
+ Note: This function processes DWO files only, not DWP files. */
-static htab_t
-create_dwo_debug_info_hash_table (struct dwo_file *dwo_file)
+static struct dwo_unit *
+create_dwo_cu (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;
+ const gdb_byte *info_ptr, *end_ptr;
+ struct create_dwo_cu_data create_dwo_cu_data;
+ struct dwo_unit *dwo_unit;
dwarf2_read_section (objfile, section);
info_ptr = section->buffer;
/* 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;
+ abfd = get_section_bfd_owner (section);
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);
+ {
+ fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n",
+ get_section_name (section),
+ get_section_file_name (section));
+ }
- create_dwo_info_table_data.dwo_file = dwo_file;
- create_dwo_info_table_data.cu_htab = cu_htab;
+ create_dwo_cu_data.dwo_file = dwo_file;
+ dwo_unit = NULL;
end_ptr = info_ptr + section->size;
while (info_ptr < end_ptr)
{
struct dwarf2_per_cu_data per_cu;
+ memset (&create_dwo_cu_data.dwo_unit, 0,
+ sizeof (create_dwo_cu_data.dwo_unit));
memset (&per_cu, 0, sizeof (per_cu));
per_cu.objfile = objfile;
per_cu.is_debug_types = 0;
init_cutu_and_read_dies_no_follow (&per_cu,
&dwo_file->sections.abbrev,
dwo_file,
- create_dwo_debug_info_hash_table_reader,
- &create_dwo_info_table_data);
+ create_dwo_cu_reader,
+ &create_dwo_cu_data);
+
+ if (create_dwo_cu_data.dwo_unit.dwo_file != NULL)
+ {
+ /* If we've already found one, complain. We only support one
+ because having more than one requires hacking the dwo_name of
+ each to match, which is highly unlikely to happen. */
+ if (dwo_unit != NULL)
+ {
+ complaint (&symfile_complaints,
+ _("Multiple CUs in DWO file %s [in module %s]"),
+ dwo_file->dwo_name, objfile_name (objfile));
+ break;
+ }
+
+ dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit);
+ *dwo_unit = create_dwo_cu_data.dwo_unit;
+ }
info_ptr += per_cu.length;
}
- return cu_htab;
+ return dwo_unit;
}
/* DWP file .debug_{cu,tu}_index section format:
[ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
+ DWP Version 1:
+
Both index sections have the same format, and serve to map a 64-bit
signature to a set of section numbers. Each section begins with a header,
followed by a hash table of 64-bit signatures, a parallel table of 32-bit
indexes, and a pool of 32-bit section numbers. The index sections will be
aligned at 8-byte boundaries in the file.
- The index section header contains two unsigned 32-bit values (using the
- byte order of the application binary):
-
- N, the number of compilation units or type units in the index
- M, the number of slots in the hash table
-
- (We assume that N and M will not exceed 2^32 - 1.)
-
- The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
-
- The hash table begins at offset 8 in the section, and consists of an array
- of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
- order of the application binary). Unused slots in the hash table are 0.
- (We rely on the extreme unlikeliness of a signature being exactly 0.)
-
- The parallel table begins immediately after the hash table
- (at offset 8 + 8 * M from the beginning of the section), and consists of an
- array of 32-bit indexes (using the byte order of the application binary),
- corresponding 1-1 with slots in the hash table. Each entry in the parallel
- table contains a 32-bit index into the pool of section numbers. For unused
- hash table slots, the corresponding entry in the parallel table will be 0.
-
- Given a 64-bit compilation unit signature or a type signature S, an entry
- in the hash table is located as follows:
-
- 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
- the low-order k bits all set to 1.
-
- 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
-
- 3) If the hash table entry at index H matches the signature, use that
- entry. If the hash table entry at index H is unused (all zeroes),
- terminate the search: the signature is not present in the table.
-
- 4) Let H = (H + H') modulo M. Repeat at Step 3.
-
- Because M > N and H' and M are relatively prime, the search is guaranteed
- to stop at an unused slot or find the match.
-
- The pool of section numbers begins immediately following the hash table
- (at offset 8 + 12 * M from the beginning of the section). The pool of
- section numbers consists of an array of 32-bit words (using the byte order
- of the application binary). Each item in the array is indexed starting
- from 0. The hash table entry provides the index of the first section
- number in the set. Additional section numbers in the set follow, and the
- set is terminated by a 0 entry (section number 0 is not used in ELF).
-
- In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
- section must be the first entry in the set, and the .debug_abbrev.dwo must
- be the second entry. Other members of the set may follow in any order. */
+ The index section header consists of:
+
+ V, 32 bit version number
+ -, 32 bits unused
+ N, 32 bit number of compilation units or type units in the index
+ M, 32 bit number of slots in the hash table
+
+ Numbers are recorded using the byte order of the application binary.
+
+ The hash table begins at offset 16 in the section, and consists of an array
+ of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
+ order of the application binary). Unused slots in the hash table are 0.
+ (We rely on the extreme unlikeliness of a signature being exactly 0.)
+
+ The parallel table begins immediately after the hash table
+ (at offset 16 + 8 * M from the beginning of the section), and consists of an
+ array of 32-bit indexes (using the byte order of the application binary),
+ corresponding 1-1 with slots in the hash table. Each entry in the parallel
+ table contains a 32-bit index into the pool of section numbers. For unused
+ hash table slots, the corresponding entry in the parallel table will be 0.
+
+ The pool of section numbers begins immediately following the hash table
+ (at offset 16 + 12 * M from the beginning of the section). The pool of
+ section numbers consists of an array of 32-bit words (using the byte order
+ of the application binary). Each item in the array is indexed starting
+ from 0. The hash table entry provides the index of the first section
+ number in the set. Additional section numbers in the set follow, and the
+ set is terminated by a 0 entry (section number 0 is not used in ELF).
+
+ In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
+ section must be the first entry in the set, and the .debug_abbrev.dwo must
+ be the second entry. Other members of the set may follow in any order.
+
+ ---
+
+ DWP Version 2:
+
+ DWP Version 2 combines all the .debug_info, etc. sections into one,
+ and the entries in the index tables are now offsets into these sections.
+ CU offsets begin at 0. TU offsets begin at the size of the .debug_info
+ section.
+
+ Index Section Contents:
+ Header
+ Hash Table of Signatures dwp_hash_table.hash_table
+ Parallel Table of Indices dwp_hash_table.unit_table
+ Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
+ Table of Section Sizes dwp_hash_table.v2.sizes
+
+ The index section header consists of:
+
+ V, 32 bit version number
+ L, 32 bit number of columns in the table of section offsets
+ N, 32 bit number of compilation units or type units in the index
+ M, 32 bit number of slots in the hash table
+
+ Numbers are recorded using the byte order of the application binary.
+
+ The hash table has the same format as version 1.
+ The parallel table of indices has the same format as version 1,
+ except that the entries are origin-1 indices into the table of sections
+ offsets and the table of section sizes.
+
+ The table of offsets begins immediately following the parallel table
+ (at offset 16 + 12 * M from the beginning of the section). The table is
+ a two-dimensional array of 32-bit words (using the byte order of the
+ application binary), with L columns and N+1 rows, in row-major order.
+ Each row in the array is indexed starting from 0. The first row provides
+ a key to the remaining rows: each column in this row provides an identifier
+ for a debug section, and the offsets in the same column of subsequent rows
+ refer to that section. The section identifiers are:
+
+ DW_SECT_INFO 1 .debug_info.dwo
+ DW_SECT_TYPES 2 .debug_types.dwo
+ DW_SECT_ABBREV 3 .debug_abbrev.dwo
+ DW_SECT_LINE 4 .debug_line.dwo
+ DW_SECT_LOC 5 .debug_loc.dwo
+ DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
+ DW_SECT_MACINFO 7 .debug_macinfo.dwo
+ DW_SECT_MACRO 8 .debug_macro.dwo
+
+ The offsets provided by the CU and TU index sections are the base offsets
+ for the contributions made by each CU or TU to the corresponding section
+ in the package file. Each CU and TU header contains an abbrev_offset
+ field, used to find the abbreviations table for that CU or TU within the
+ contribution to the .debug_abbrev.dwo section for that CU or TU, and should
+ be interpreted as relative to the base offset given in the index section.
+ Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
+ should be interpreted as relative to the base offset for .debug_line.dwo,
+ and offsets into other debug sections obtained from DWARF attributes should
+ also be interpreted as relative to the corresponding base offset.
+
+ The table of sizes begins immediately following the table of offsets.
+ Like the table of offsets, it is a two-dimensional array of 32-bit words,
+ with L columns and N rows, in row-major order. Each row in the array is
+ indexed starting from 1 (row 0 is shared by the two tables).
+
+ ---
+
+ Hash table lookup is handled the same in version 1 and 2:
+
+ We assume that N and M will not exceed 2^32 - 1.
+ The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
+
+ Given a 64-bit compilation unit signature or a type signature S, an entry
+ in the hash table is located as follows:
+
+ 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
+ the low-order k bits all set to 1.
+
+ 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
+
+ 3) If the hash table entry at index H matches the signature, use that
+ entry. If the hash table entry at index H is unused (all zeroes),
+ terminate the search: the signature is not present in the table.
+
+ 4) Let H = (H + H') modulo M. Repeat at Step 3.
+
+ Because M > N and H' and M are relatively prime, the search is guaranteed
+ to stop at an unused slot or find the match. */
/* Create a hash table to map DWO IDs to their CU/TU entry in
.debug_{info,types}.dwo in DWP_FILE.
{
struct objfile *objfile = dwarf2_per_objfile->objfile;
bfd *dbfd = dwp_file->dbfd;
- char *index_ptr, *index_end;
+ const gdb_byte *index_ptr, *index_end;
struct dwarf2_section_info *index;
- uint32_t version, nr_units, nr_slots;
+ uint32_t version, nr_columns, nr_units, nr_slots;
struct dwp_hash_table *htab;
if (is_debug_types)
index_end = index_ptr + index->size;
version = read_4_bytes (dbfd, index_ptr);
- index_ptr += 8; /* Skip the unused word. */
+ index_ptr += 4;
+ if (version == 2)
+ nr_columns = read_4_bytes (dbfd, index_ptr);
+ else
+ nr_columns = 0;
+ index_ptr += 4;
nr_units = read_4_bytes (dbfd, index_ptr);
index_ptr += 4;
nr_slots = read_4_bytes (dbfd, index_ptr);
index_ptr += 4;
- if (version != 1)
+ if (version != 1 && version != 2)
{
- error (_("Dwarf Error: unsupported DWP file version (%u)"
+ error (_("Dwarf Error: unsupported DWP file version (%s)"
" [in module %s]"),
- version, dwp_file->name);
+ pulongest (version), dwp_file->name);
}
if (nr_slots != (nr_slots & -nr_slots))
{
- error (_("Dwarf Error: number of slots in DWP hash table (%u)"
+ error (_("Dwarf Error: number of slots in DWP hash table (%s)"
" is not power of 2 [in module %s]"),
- nr_slots, dwp_file->name);
+ pulongest (nr_slots), dwp_file->name);
}
htab = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_hash_table);
+ htab->version = version;
+ htab->nr_columns = nr_columns;
htab->nr_units = nr_units;
htab->nr_slots = nr_slots;
htab->hash_table = index_ptr;
htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots;
- htab->section_pool = htab->unit_table + sizeof (uint32_t) * nr_slots;
+
+ /* Exit early if the table is empty. */
+ if (nr_slots == 0 || nr_units == 0
+ || (version == 2 && nr_columns == 0))
+ {
+ /* All must be zero. */
+ if (nr_slots != 0 || nr_units != 0
+ || (version == 2 && nr_columns != 0))
+ {
+ complaint (&symfile_complaints,
+ _("Empty DWP but nr_slots,nr_units,nr_columns not"
+ " all zero [in modules %s]"),
+ dwp_file->name);
+ }
+ return htab;
+ }
+
+ if (version == 1)
+ {
+ htab->section_pool.v1.indices =
+ htab->unit_table + sizeof (uint32_t) * nr_slots;
+ /* It's harder to decide whether the section is too small in v1.
+ V1 is deprecated anyway so we punt. */
+ }
+ else
+ {
+ const gdb_byte *ids_ptr = htab->unit_table + sizeof (uint32_t) * nr_slots;
+ int *ids = htab->section_pool.v2.section_ids;
+ /* Reverse map for error checking. */
+ int ids_seen[DW_SECT_MAX + 1];
+ int i;
+
+ if (nr_columns < 2)
+ {
+ error (_("Dwarf Error: bad DWP hash table, too few columns"
+ " in section table [in module %s]"),
+ dwp_file->name);
+ }
+ if (nr_columns > MAX_NR_V2_DWO_SECTIONS)
+ {
+ error (_("Dwarf Error: bad DWP hash table, too many columns"
+ " in section table [in module %s]"),
+ dwp_file->name);
+ }
+ memset (ids, 255, (DW_SECT_MAX + 1) * sizeof (int32_t));
+ memset (ids_seen, 255, (DW_SECT_MAX + 1) * sizeof (int32_t));
+ for (i = 0; i < nr_columns; ++i)
+ {
+ int id = read_4_bytes (dbfd, ids_ptr + i * sizeof (uint32_t));
+
+ if (id < DW_SECT_MIN || id > DW_SECT_MAX)
+ {
+ error (_("Dwarf Error: bad DWP hash table, bad section id %d"
+ " in section table [in module %s]"),
+ id, dwp_file->name);
+ }
+ if (ids_seen[id] != -1)
+ {
+ error (_("Dwarf Error: bad DWP hash table, duplicate section"
+ " id %d in section table [in module %s]"),
+ id, dwp_file->name);
+ }
+ ids_seen[id] = i;
+ ids[i] = id;
+ }
+ /* Must have exactly one info or types section. */
+ if (((ids_seen[DW_SECT_INFO] != -1)
+ + (ids_seen[DW_SECT_TYPES] != -1))
+ != 1)
+ {
+ error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
+ " DWO info/types section [in module %s]"),
+ dwp_file->name);
+ }
+ /* Must have an abbrev section. */
+ if (ids_seen[DW_SECT_ABBREV] == -1)
+ {
+ error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
+ " section [in module %s]"),
+ dwp_file->name);
+ }
+ htab->section_pool.v2.offsets = ids_ptr + sizeof (uint32_t) * nr_columns;
+ htab->section_pool.v2.sizes =
+ htab->section_pool.v2.offsets + (sizeof (uint32_t)
+ * nr_units * nr_columns);
+ if ((htab->section_pool.v2.sizes + (sizeof (uint32_t)
+ * nr_units * nr_columns))
+ > index_end)
+ {
+ error (_("Dwarf Error: DWP index section is corrupt (too small)"
+ " [in module %s]"),
+ dwp_file->name);
+ }
+ }
return htab;
}
This function is like the other "locate" section routines that are
passed to bfd_map_over_sections, but in this context the sections to
- read comes from the DWP hash table, not the full ELF section table.
+ read comes from the DWP V1 hash table, not the full ELF section table.
The result is non-zero for success, or zero if an error was found. */
static int
-locate_virtual_dwo_sections (asection *sectp,
- struct virtual_dwo_sections *sections)
+locate_v1_virtual_dwo_sections (asection *sectp,
+ struct virtual_v1_dwo_sections *sections)
{
const struct dwop_section_names *names = &dwop_section_names;
if (section_is_p (sectp->name, &names->abbrev_dwo))
{
/* There can be only one. */
- if (sections->abbrev.asection != NULL)
+ if (sections->abbrev.s.asection != NULL)
return 0;
- sections->abbrev.asection = sectp;
+ sections->abbrev.s.asection = sectp;
sections->abbrev.size = bfd_get_section_size (sectp);
}
else if (section_is_p (sectp->name, &names->info_dwo)
|| section_is_p (sectp->name, &names->types_dwo))
{
/* There can be only one. */
- if (sections->info_or_types.asection != NULL)
+ if (sections->info_or_types.s.asection != NULL)
return 0;
- sections->info_or_types.asection = sectp;
+ sections->info_or_types.s.asection = sectp;
sections->info_or_types.size = bfd_get_section_size (sectp);
}
else if (section_is_p (sectp->name, &names->line_dwo))
{
/* There can be only one. */
- if (sections->line.asection != NULL)
+ if (sections->line.s.asection != NULL)
return 0;
- sections->line.asection = sectp;
+ sections->line.s.asection = sectp;
sections->line.size = bfd_get_section_size (sectp);
}
else if (section_is_p (sectp->name, &names->loc_dwo))
{
/* There can be only one. */
- if (sections->loc.asection != NULL)
+ if (sections->loc.s.asection != NULL)
return 0;
- sections->loc.asection = sectp;
+ sections->loc.s.asection = sectp;
sections->loc.size = bfd_get_section_size (sectp);
}
else if (section_is_p (sectp->name, &names->macinfo_dwo))
{
/* There can be only one. */
- if (sections->macinfo.asection != NULL)
+ if (sections->macinfo.s.asection != NULL)
return 0;
- sections->macinfo.asection = sectp;
+ sections->macinfo.s.asection = sectp;
sections->macinfo.size = bfd_get_section_size (sectp);
}
else if (section_is_p (sectp->name, &names->macro_dwo))
{
/* There can be only one. */
- if (sections->macro.asection != NULL)
+ if (sections->macro.s.asection != NULL)
return 0;
- sections->macro.asection = sectp;
+ sections->macro.s.asection = sectp;
sections->macro.size = bfd_get_section_size (sectp);
}
else if (section_is_p (sectp->name, &names->str_offsets_dwo))
{
/* There can be only one. */
- if (sections->str_offsets.asection != NULL)
+ if (sections->str_offsets.s.asection != NULL)
return 0;
- sections->str_offsets.asection = sectp;
+ sections->str_offsets.s.asection = sectp;
sections->str_offsets.size = bfd_get_section_size (sectp);
}
else
return 1;
}
-/* Create a dwo_unit object for the DWO with signature SIGNATURE.
- HTAB is the hash table from the DWP file.
- SECTION_INDEX is the index of the DWO in HTAB. */
+/* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
+ UNIT_INDEX is the index of the DWO unit in the DWP hash table.
+ COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
+ This is for DWP version 1 files. */
static struct dwo_unit *
-create_dwo_in_dwp (struct dwp_file *dwp_file,
- const struct dwp_hash_table *htab,
- uint32_t section_index,
- ULONGEST signature, int is_debug_types)
+create_dwo_unit_in_dwp_v1 (struct dwp_file *dwp_file,
+ uint32_t unit_index,
+ const char *comp_dir,
+ ULONGEST signature, int is_debug_types)
{
struct objfile *objfile = dwarf2_per_objfile->objfile;
+ const struct dwp_hash_table *dwp_htab =
+ is_debug_types ? dwp_file->tus : dwp_file->cus;
bfd *dbfd = dwp_file->dbfd;
const char *kind = is_debug_types ? "TU" : "CU";
struct dwo_file *dwo_file;
struct dwo_unit *dwo_unit;
- struct virtual_dwo_sections sections;
+ struct virtual_v1_dwo_sections sections;
void **dwo_file_slot;
char *virtual_dwo_name;
struct dwarf2_section_info *cutu;
struct cleanup *cleanups;
int i;
+ gdb_assert (dwp_file->version == 1);
+
if (dwarf2_read_debug)
{
- fprintf_unfiltered (gdb_stdlog, "Reading %s %u/0x%s in DWP file: %s\n",
+ fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V1 file: %s\n",
kind,
- section_index, phex (signature, sizeof (signature)),
+ pulongest (unit_index), hex_string (signature),
dwp_file->name);
}
- /* Fetch the sections of this DWO.
+ /* Fetch the sections of this DWO unit.
Put a limit on the number of sections we look for so that bad data
doesn't cause us to loop forever. */
-#define MAX_NR_DWO_SECTIONS \
- (1 /* .debug_info or .debug_types */ \
- + 1 /* .debug_abbrev */ \
- + 1 /* .debug_line */ \
- + 1 /* .debug_loc */ \
- + 1 /* .debug_str_offsets */ \
- + 1 /* .debug_macro */ \
- + 1 /* .debug_macinfo */ \
- + 1 /* trailing zero */)
+#define MAX_NR_V1_DWO_SECTIONS \
+ (1 /* .debug_info or .debug_types */ \
+ + 1 /* .debug_abbrev */ \
+ + 1 /* .debug_line */ \
+ + 1 /* .debug_loc */ \
+ + 1 /* .debug_str_offsets */ \
+ + 1 /* .debug_macro or .debug_macinfo */ \
+ + 1 /* trailing zero */)
+
+ memset (§ions, 0, sizeof (sections));
+ cleanups = make_cleanup (null_cleanup, 0);
+
+ for (i = 0; i < MAX_NR_V1_DWO_SECTIONS; ++i)
+ {
+ asection *sectp;
+ uint32_t section_nr =
+ read_4_bytes (dbfd,
+ dwp_htab->section_pool.v1.indices
+ + (unit_index + i) * sizeof (uint32_t));
+
+ if (section_nr == 0)
+ break;
+ if (section_nr >= dwp_file->num_sections)
+ {
+ error (_("Dwarf Error: bad DWP hash table, section number too large"
+ " [in module %s]"),
+ dwp_file->name);
+ }
+
+ sectp = dwp_file->elf_sections[section_nr];
+ if (! locate_v1_virtual_dwo_sections (sectp, §ions))
+ {
+ error (_("Dwarf Error: bad DWP hash table, invalid section found"
+ " [in module %s]"),
+ dwp_file->name);
+ }
+ }
+
+ if (i < 2
+ || dwarf2_section_empty_p (§ions.info_or_types)
+ || dwarf2_section_empty_p (§ions.abbrev))
+ {
+ error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
+ " [in module %s]"),
+ dwp_file->name);
+ }
+ if (i == MAX_NR_V1_DWO_SECTIONS)
+ {
+ error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
+ " [in module %s]"),
+ dwp_file->name);
+ }
+
+ /* It's easier for the rest of the code if we fake a struct dwo_file and
+ have dwo_unit "live" in that. At least for now.
+
+ The DWP file can be made up of a random collection of CUs and TUs.
+ However, for each CU + set of TUs that came from the same original DWO
+ file, we can combine them back into a virtual DWO file to save space
+ (fewer struct dwo_file objects to allocate). Remember that for really
+ large apps there can be on the order of 8K CUs and 200K TUs, or more. */
+
+ virtual_dwo_name =
+ xstrprintf ("virtual-dwo/%d-%d-%d-%d",
+ get_section_id (§ions.abbrev),
+ get_section_id (§ions.line),
+ get_section_id (§ions.loc),
+ get_section_id (§ions.str_offsets));
+ make_cleanup (xfree, virtual_dwo_name);
+ /* Can we use an existing virtual DWO file? */
+ dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name, comp_dir);
+ /* Create one if necessary. */
+ if (*dwo_file_slot == NULL)
+ {
+ if (dwarf2_read_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n",
+ virtual_dwo_name);
+ }
+ dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file);
+ dwo_file->dwo_name = obstack_copy0 (&objfile->objfile_obstack,
+ virtual_dwo_name,
+ strlen (virtual_dwo_name));
+ dwo_file->comp_dir = comp_dir;
+ dwo_file->sections.abbrev = sections.abbrev;
+ dwo_file->sections.line = sections.line;
+ dwo_file->sections.loc = sections.loc;
+ dwo_file->sections.macinfo = sections.macinfo;
+ dwo_file->sections.macro = sections.macro;
+ dwo_file->sections.str_offsets = sections.str_offsets;
+ /* The "str" section is global to the entire DWP file. */
+ dwo_file->sections.str = dwp_file->sections.str;
+ /* The info or types section is assigned below to dwo_unit,
+ there's no need to record it in dwo_file.
+ Also, we can't simply record type sections in dwo_file because
+ we record a pointer into the vector in dwo_unit. As we collect more
+ types we'll grow the vector and eventually have to reallocate space
+ for it, invalidating all copies of pointers into the previous
+ contents. */
+ *dwo_file_slot = dwo_file;
+ }
+ else
+ {
+ if (dwarf2_read_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n",
+ virtual_dwo_name);
+ }
+ dwo_file = *dwo_file_slot;
+ }
+ do_cleanups (cleanups);
+
+ dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit);
+ dwo_unit->dwo_file = dwo_file;
+ dwo_unit->signature = signature;
+ dwo_unit->section = obstack_alloc (&objfile->objfile_obstack,
+ sizeof (struct dwarf2_section_info));
+ *dwo_unit->section = sections.info_or_types;
+ /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
+
+ return dwo_unit;
+}
+
+/* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
+ Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
+ piece within that section used by a TU/CU, return a virtual section
+ of just that piece. */
+
+static struct dwarf2_section_info
+create_dwp_v2_section (struct dwarf2_section_info *section,
+ bfd_size_type offset, bfd_size_type size)
+{
+ struct dwarf2_section_info result;
+ asection *sectp;
+
+ gdb_assert (section != NULL);
+ gdb_assert (!section->is_virtual);
+
+ memset (&result, 0, sizeof (result));
+ result.s.containing_section = section;
+ result.is_virtual = 1;
+
+ if (size == 0)
+ return result;
+
+ sectp = get_section_bfd_section (section);
+
+ /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
+ bounds of the real section. This is a pretty-rare event, so just
+ flag an error (easier) instead of a warning and trying to cope. */
+ if (sectp == NULL
+ || offset + size > bfd_get_section_size (sectp))
+ {
+ bfd *abfd = sectp->owner;
+
+ error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
+ " in section %s [in module %s]"),
+ sectp ? bfd_section_name (abfd, sectp) : "<unknown>",
+ objfile_name (dwarf2_per_objfile->objfile));
+ }
+
+ result.virtual_offset = offset;
+ result.size = size;
+ return result;
+}
+
+/* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
+ UNIT_INDEX is the index of the DWO unit in the DWP hash table.
+ COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
+ This is for DWP version 2 files. */
+
+static struct dwo_unit *
+create_dwo_unit_in_dwp_v2 (struct dwp_file *dwp_file,
+ uint32_t unit_index,
+ const char *comp_dir,
+ ULONGEST signature, int is_debug_types)
+{
+ struct objfile *objfile = dwarf2_per_objfile->objfile;
+ const struct dwp_hash_table *dwp_htab =
+ is_debug_types ? dwp_file->tus : dwp_file->cus;
+ bfd *dbfd = dwp_file->dbfd;
+ const char *kind = is_debug_types ? "TU" : "CU";
+ struct dwo_file *dwo_file;
+ struct dwo_unit *dwo_unit;
+ struct virtual_v2_dwo_sections sections;
+ void **dwo_file_slot;
+ char *virtual_dwo_name;
+ struct dwarf2_section_info *cutu;
+ struct cleanup *cleanups;
+ int i;
+
+ gdb_assert (dwp_file->version == 2);
+
+ if (dwarf2_read_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V2 file: %s\n",
+ kind,
+ pulongest (unit_index), hex_string (signature),
+ dwp_file->name);
+ }
+
+ /* Fetch the section offsets of this DWO unit. */
memset (§ions, 0, sizeof (sections));
cleanups = make_cleanup (null_cleanup, 0);
- for (i = 0; i < MAX_NR_DWO_SECTIONS; ++i)
+ for (i = 0; i < dwp_htab->nr_columns; ++i)
{
- asection *sectp;
- uint32_t section_nr =
- read_4_bytes (dbfd,
- htab->section_pool
- + (section_index + i) * sizeof (uint32_t));
-
- if (section_nr == 0)
- break;
- if (section_nr >= dwp_file->num_sections)
- {
- error (_("Dwarf Error: bad DWP hash table, section number too large"
- " [in module %s]"),
- dwp_file->name);
- }
+ uint32_t offset = read_4_bytes (dbfd,
+ dwp_htab->section_pool.v2.offsets
+ + (((unit_index - 1) * dwp_htab->nr_columns
+ + i)
+ * sizeof (uint32_t)));
+ uint32_t size = read_4_bytes (dbfd,
+ dwp_htab->section_pool.v2.sizes
+ + (((unit_index - 1) * dwp_htab->nr_columns
+ + i)
+ * sizeof (uint32_t)));
- sectp = dwp_file->elf_sections[section_nr];
- if (! locate_virtual_dwo_sections (sectp, §ions))
+ switch (dwp_htab->section_pool.v2.section_ids[i])
{
- error (_("Dwarf Error: bad DWP hash table, invalid section found"
- " [in module %s]"),
- dwp_file->name);
+ case DW_SECT_INFO:
+ case DW_SECT_TYPES:
+ sections.info_or_types_offset = offset;
+ sections.info_or_types_size = size;
+ break;
+ case DW_SECT_ABBREV:
+ sections.abbrev_offset = offset;
+ sections.abbrev_size = size;
+ break;
+ case DW_SECT_LINE:
+ sections.line_offset = offset;
+ sections.line_size = size;
+ break;
+ case DW_SECT_LOC:
+ sections.loc_offset = offset;
+ sections.loc_size = size;
+ break;
+ case DW_SECT_STR_OFFSETS:
+ sections.str_offsets_offset = offset;
+ sections.str_offsets_size = size;
+ break;
+ case DW_SECT_MACINFO:
+ sections.macinfo_offset = offset;
+ sections.macinfo_size = size;
+ break;
+ case DW_SECT_MACRO:
+ sections.macro_offset = offset;
+ sections.macro_size = size;
+ break;
}
}
- if (i < 2
- || sections.info_or_types.asection == NULL
- || sections.abbrev.asection == NULL)
- {
- error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
- " [in module %s]"),
- dwp_file->name);
- }
- if (i == MAX_NR_DWO_SECTIONS)
- {
- error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
- " [in module %s]"),
- dwp_file->name);
- }
-
/* It's easier for the rest of the code if we fake a struct dwo_file and
have dwo_unit "live" in that. At least for now.
The DWP file can be made up of a random collection of CUs and TUs.
However, for each CU + set of TUs that came from the same original DWO
- file, we want to combine them back into a virtual DWO file to save space
- (fewer struct dwo_file objects to allocated). Remember that for really
+ file, we can combine them back into a virtual DWO file to save space
+ (fewer struct dwo_file objects to allocate). Remember that for really
large apps there can be on the order of 8K CUs and 200K TUs, or more. */
virtual_dwo_name =
- xstrprintf ("virtual-dwo/%d-%d-%d-%d",
- sections.abbrev.asection ? sections.abbrev.asection->id : 0,
- sections.line.asection ? sections.line.asection->id : 0,
- sections.loc.asection ? sections.loc.asection->id : 0,
- (sections.str_offsets.asection
- ? sections.str_offsets.asection->id
- : 0));
+ xstrprintf ("virtual-dwo/%ld-%ld-%ld-%ld",
+ (long) (sections.abbrev_size ? sections.abbrev_offset : 0),
+ (long) (sections.line_size ? sections.line_offset : 0),
+ (long) (sections.loc_size ? sections.loc_offset : 0),
+ (long) (sections.str_offsets_size
+ ? sections.str_offsets_offset : 0));
make_cleanup (xfree, virtual_dwo_name);
/* Can we use an existing virtual DWO file? */
- dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name);
+ dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name, comp_dir);
/* Create one if necessary. */
if (*dwo_file_slot == NULL)
{
virtual_dwo_name);
}
dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file);
- dwo_file->name = obstack_copy0 (&objfile->objfile_obstack,
- virtual_dwo_name,
- strlen (virtual_dwo_name));
- dwo_file->sections.abbrev = sections.abbrev;
- dwo_file->sections.line = sections.line;
- dwo_file->sections.loc = sections.loc;
- dwo_file->sections.macinfo = sections.macinfo;
- dwo_file->sections.macro = sections.macro;
- dwo_file->sections.str_offsets = sections.str_offsets;
+ dwo_file->dwo_name = obstack_copy0 (&objfile->objfile_obstack,
+ virtual_dwo_name,
+ strlen (virtual_dwo_name));
+ dwo_file->comp_dir = comp_dir;
+ dwo_file->sections.abbrev =
+ create_dwp_v2_section (&dwp_file->sections.abbrev,
+ sections.abbrev_offset, sections.abbrev_size);
+ dwo_file->sections.line =
+ create_dwp_v2_section (&dwp_file->sections.line,
+ sections.line_offset, sections.line_size);
+ dwo_file->sections.loc =
+ create_dwp_v2_section (&dwp_file->sections.loc,
+ sections.loc_offset, sections.loc_size);
+ dwo_file->sections.macinfo =
+ create_dwp_v2_section (&dwp_file->sections.macinfo,
+ sections.macinfo_offset, sections.macinfo_size);
+ dwo_file->sections.macro =
+ create_dwp_v2_section (&dwp_file->sections.macro,
+ sections.macro_offset, sections.macro_size);
+ dwo_file->sections.str_offsets =
+ create_dwp_v2_section (&dwp_file->sections.str_offsets,
+ sections.str_offsets_offset,
+ sections.str_offsets_size);
/* The "str" section is global to the entire DWP file. */
dwo_file->sections.str = dwp_file->sections.str;
- /* The info or types section is assigned later to dwo_unit,
+ /* The info or types section is assigned below to dwo_unit,
there's no need to record it in dwo_file.
Also, we can't simply record type sections in dwo_file because
we record a pointer into the vector in dwo_unit. As we collect more
types we'll grow the vector and eventually have to reallocate space
- for it, invalidating all the pointers into the current copy. */
+ for it, invalidating all copies of pointers into the previous
+ contents. */
*dwo_file_slot = dwo_file;
}
else
dwo_unit->signature = signature;
dwo_unit->section = obstack_alloc (&objfile->objfile_obstack,
sizeof (struct dwarf2_section_info));
- *dwo_unit->section = sections.info_or_types;
- /* offset, length, type_offset_in_tu are set later. */
+ *dwo_unit->section = create_dwp_v2_section (is_debug_types
+ ? &dwp_file->sections.types
+ : &dwp_file->sections.info,
+ sections.info_or_types_offset,
+ sections.info_or_types_size);
+ /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
return dwo_unit;
}
-/* Lookup the DWO with SIGNATURE in DWP_FILE. */
+/* Lookup the DWO unit with SIGNATURE in DWP_FILE.
+ Returns NULL if the signature isn't found. */
static struct dwo_unit *
-lookup_dwo_in_dwp (struct dwp_file *dwp_file,
- const struct dwp_hash_table *htab,
- ULONGEST signature, int is_debug_types)
+lookup_dwo_unit_in_dwp (struct dwp_file *dwp_file, const char *comp_dir,
+ ULONGEST signature, int is_debug_types)
{
+ const struct dwp_hash_table *dwp_htab =
+ is_debug_types ? dwp_file->tus : dwp_file->cus;
bfd *dbfd = dwp_file->dbfd;
- uint32_t mask = htab->nr_slots - 1;
+ uint32_t mask = dwp_htab->nr_slots - 1;
uint32_t hash = signature & mask;
uint32_t hash2 = ((signature >> 32) & mask) | 1;
unsigned int i;
memset (&find_dwo_cu, 0, sizeof (find_dwo_cu));
find_dwo_cu.signature = signature;
- slot = htab_find_slot (dwp_file->loaded_cutus, &find_dwo_cu, INSERT);
+ slot = htab_find_slot (is_debug_types
+ ? dwp_file->loaded_tus
+ : dwp_file->loaded_cus,
+ &find_dwo_cu, INSERT);
if (*slot != NULL)
return *slot;
/* Use a for loop so that we don't loop forever on bad debug info. */
- for (i = 0; i < htab->nr_slots; ++i)
+ for (i = 0; i < dwp_htab->nr_slots; ++i)
{
ULONGEST signature_in_table;
signature_in_table =
- read_8_bytes (dbfd, htab->hash_table + hash * sizeof (uint64_t));
+ read_8_bytes (dbfd, dwp_htab->hash_table + hash * sizeof (uint64_t));
if (signature_in_table == signature)
{
- uint32_t section_index =
- read_4_bytes (dbfd, htab->unit_table + hash * sizeof (uint32_t));
+ uint32_t unit_index =
+ read_4_bytes (dbfd,
+ dwp_htab->unit_table + hash * sizeof (uint32_t));
- *slot = create_dwo_in_dwp (dwp_file, htab, section_index,
- signature, is_debug_types);
+ if (dwp_file->version == 1)
+ {
+ *slot = create_dwo_unit_in_dwp_v1 (dwp_file, unit_index,
+ comp_dir, signature,
+ is_debug_types);
+ }
+ else
+ {
+ *slot = create_dwo_unit_in_dwp_v2 (dwp_file, unit_index,
+ comp_dir, signature,
+ is_debug_types);
+ }
return *slot;
}
if (signature_in_table == 0)
dwp_file->name);
}
-/* Subroutine of open_dwop_file to simplify it.
+/* Subroutine of open_dwo_file,open_dwp_file to simplify them.
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.
If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
- In case of trouble, return NULL.
+ SEARCH_CWD is true if the current directory is to be searched.
+ It will be searched before debug-file-directory.
+ If successful, the file is added to the bfd include table of the
+ objfile's bfd (see gdb_bfd_record_inclusion).
+ If unable to find/open the file, return NULL.
NOTE: This function is derived from symfile_bfd_open. */
static bfd *
-try_open_dwop_file (const char *file_name, int is_dwp)
+try_open_dwop_file (const char *file_name, int is_dwp, int search_cwd)
{
bfd *sym_bfd;
int desc, flags;
char *absolute_name;
+ /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
+ FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
+ to debug_file_directory. */
+ char *search_path;
+ static const char dirname_separator_string[] = { DIRNAME_SEPARATOR, '\0' };
- flags = OPF_TRY_CWD_FIRST;
+ if (search_cwd)
+ {
+ if (*debug_file_directory != '\0')
+ search_path = concat (".", dirname_separator_string,
+ debug_file_directory, NULL);
+ else
+ search_path = xstrdup (".");
+ }
+ else
+ search_path = xstrdup (debug_file_directory);
+
+ flags = OPF_RETURN_REALPATH;
if (is_dwp)
flags |= OPF_SEARCH_IN_PATH;
- desc = openp (debug_file_directory, flags, file_name,
+ desc = openp (search_path, flags, file_name,
O_RDONLY | O_BINARY, &absolute_name);
+ xfree (search_path);
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);
+ if (sym_bfd == NULL)
+ return NULL;
bfd_set_cacheable (sym_bfd, 1);
if (!bfd_check_format (sym_bfd, bfd_object))
return NULL;
}
+ /* Success. Record the bfd as having been included by the objfile's bfd.
+ This is important because things like demangled_names_hash lives in the
+ objfile's per_bfd space and may have references to things like symbol
+ names that live in the DWO/DWP file's per_bfd space. PR 16426. */
+ gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, sym_bfd);
+
return sym_bfd;
}
-/* Try to open DWO/DWP file FILE_NAME.
+/* Try to open DWO file FILE_NAME.
COMP_DIR is the DW_AT_comp_dir attribute.
- If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
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_dwop_file (const char *file_name, const char *comp_dir, int is_dwp)
+open_dwo_file (const char *file_name, const char *comp_dir)
{
bfd *abfd;
if (IS_ABSOLUTE_PATH (file_name))
- return try_open_dwop_file (file_name, is_dwp);
+ return try_open_dwop_file (file_name, 0 /*is_dwp*/, 0 /*search_cwd*/);
/* Before trying the search path, try DWO_NAME in COMP_DIR. */
/* NOTE: If comp_dir is a relative path, this will also try the
search path, which seems useful. */
- abfd = try_open_dwop_file (path_to_try, is_dwp);
+ abfd = try_open_dwop_file (path_to_try, 0 /*is_dwp*/, 1 /*search_cwd*/);
xfree (path_to_try);
if (abfd != NULL)
return abfd;
if (*debug_file_directory == '\0')
return NULL;
- return try_open_dwop_file (file_name, is_dwp);
+ return try_open_dwop_file (file_name, 0 /*is_dwp*/, 1 /*search_cwd*/);
}
/* This function is mapped across the sections and remembers the offset and
if (section_is_p (sectp->name, &names->abbrev_dwo))
{
- dwo_sections->abbrev.asection = sectp;
+ dwo_sections->abbrev.s.asection = sectp;
dwo_sections->abbrev.size = bfd_get_section_size (sectp);
}
else if (section_is_p (sectp->name, &names->info_dwo))
{
- dwo_sections->info.asection = sectp;
+ dwo_sections->info.s.asection = sectp;
dwo_sections->info.size = bfd_get_section_size (sectp);
}
else if (section_is_p (sectp->name, &names->line_dwo))
{
- dwo_sections->line.asection = sectp;
+ dwo_sections->line.s.asection = sectp;
dwo_sections->line.size = bfd_get_section_size (sectp);
}
else if (section_is_p (sectp->name, &names->loc_dwo))
{
- dwo_sections->loc.asection = sectp;
+ dwo_sections->loc.s.asection = sectp;
dwo_sections->loc.size = bfd_get_section_size (sectp);
}
else if (section_is_p (sectp->name, &names->macinfo_dwo))
{
- dwo_sections->macinfo.asection = sectp;
+ dwo_sections->macinfo.s.asection = sectp;
dwo_sections->macinfo.size = bfd_get_section_size (sectp);
}
else if (section_is_p (sectp->name, &names->macro_dwo))
{
- dwo_sections->macro.asection = sectp;
+ dwo_sections->macro.s.asection = sectp;
dwo_sections->macro.size = bfd_get_section_size (sectp);
}
else if (section_is_p (sectp->name, &names->str_dwo))
{
- dwo_sections->str.asection = sectp;
+ dwo_sections->str.s.asection = sectp;
dwo_sections->str.size = bfd_get_section_size (sectp);
}
else if (section_is_p (sectp->name, &names->str_offsets_dwo))
{
- dwo_sections->str_offsets.asection = sectp;
+ dwo_sections->str_offsets.s.asection = sectp;
dwo_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.s.asection = sectp;
type_section.size = bfd_get_section_size (sectp);
VEC_safe_push (dwarf2_section_info_def, dwo_sections->types,
&type_section);
}
}
-/* Initialize the use of the DWO file specified by DWO_NAME.
+/* Initialize the use of the DWO file specified by DWO_NAME and referenced
+ by PER_CU. This is for the non-DWP case.
The result is NULL if DWO_NAME can't be found. */
static struct dwo_file *
-open_and_init_dwo_file (const char *dwo_name, const char *comp_dir)
+open_and_init_dwo_file (struct dwarf2_per_cu_data *per_cu,
+ const char *dwo_name, const char *comp_dir)
{
struct objfile *objfile = dwarf2_per_objfile->objfile;
struct dwo_file *dwo_file;
bfd *dbfd;
struct cleanup *cleanups;
- dbfd = open_dwop_file (dwo_name, comp_dir, 0);
+ dbfd = open_dwo_file (dwo_name, comp_dir);
if (dbfd == NULL)
{
if (dwarf2_read_debug)
return NULL;
}
dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file);
- dwo_file->name = obstack_copy0 (&objfile->objfile_obstack,
- dwo_name, strlen (dwo_name));
+ dwo_file->dwo_name = dwo_name;
+ dwo_file->comp_dir = comp_dir;
dwo_file->dbfd = dbfd;
cleanups = make_cleanup (free_dwo_file_cleanup, dwo_file);
bfd_map_over_sections (dbfd, dwarf2_locate_dwo_sections, &dwo_file->sections);
- dwo_file->cus = create_dwo_debug_info_hash_table (dwo_file);
+ dwo_file->cu = create_dwo_cu (dwo_file);
dwo_file->tus = create_debug_types_hash_table (dwo_file,
dwo_file->sections.types);
}
/* This function is mapped across the sections and remembers the offset and
- size of each of the DWP debugging sections we are interested in. */
+ size of each of the DWP debugging sections common to version 1 and 2 that
+ we are interested in. */
static void
-dwarf2_locate_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr)
+dwarf2_locate_common_dwp_sections (bfd *abfd, asection *sectp,
+ void *dwp_file_ptr)
{
struct dwp_file *dwp_file = dwp_file_ptr;
const struct dwop_section_names *names = &dwop_section_names;
unsigned int elf_section_nr = elf_section_data (sectp)->this_idx;
/* Record the ELF section number for later lookup: this is what the
- .debug_cu_index,.debug_tu_index tables use. */
+ .debug_cu_index,.debug_tu_index tables use in DWP V1. */
gdb_assert (elf_section_nr < dwp_file->num_sections);
dwp_file->elf_sections[elf_section_nr] = sectp;
/* Look for specific sections that we need. */
if (section_is_p (sectp->name, &names->str_dwo))
{
- dwp_file->sections.str.asection = sectp;
+ dwp_file->sections.str.s.asection = sectp;
dwp_file->sections.str.size = bfd_get_section_size (sectp);
}
else if (section_is_p (sectp->name, &names->cu_index))
{
- dwp_file->sections.cu_index.asection = sectp;
+ dwp_file->sections.cu_index.s.asection = sectp;
dwp_file->sections.cu_index.size = bfd_get_section_size (sectp);
}
else if (section_is_p (sectp->name, &names->tu_index))
{
- dwp_file->sections.tu_index.asection = sectp;
+ dwp_file->sections.tu_index.s.asection = sectp;
dwp_file->sections.tu_index.size = bfd_get_section_size (sectp);
}
}
+/* This function is mapped across the sections and remembers the offset and
+ size of each of the DWP version 2 debugging sections that we are interested
+ in. This is split into a separate function because we don't know if we
+ have version 1 or 2 until we parse the cu_index/tu_index sections. */
+
+static void
+dwarf2_locate_v2_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr)
+{
+ struct dwp_file *dwp_file = dwp_file_ptr;
+ const struct dwop_section_names *names = &dwop_section_names;
+ unsigned int elf_section_nr = elf_section_data (sectp)->this_idx;
+
+ /* Record the ELF section number for later lookup: this is what the
+ .debug_cu_index,.debug_tu_index tables use in DWP V1. */
+ gdb_assert (elf_section_nr < dwp_file->num_sections);
+ dwp_file->elf_sections[elf_section_nr] = sectp;
+
+ /* Look for specific sections that we need. */
+ if (section_is_p (sectp->name, &names->abbrev_dwo))
+ {
+ dwp_file->sections.abbrev.s.asection = sectp;
+ dwp_file->sections.abbrev.size = bfd_get_section_size (sectp);
+ }
+ else if (section_is_p (sectp->name, &names->info_dwo))
+ {
+ dwp_file->sections.info.s.asection = sectp;
+ dwp_file->sections.info.size = bfd_get_section_size (sectp);
+ }
+ else if (section_is_p (sectp->name, &names->line_dwo))
+ {
+ dwp_file->sections.line.s.asection = sectp;
+ dwp_file->sections.line.size = bfd_get_section_size (sectp);
+ }
+ else if (section_is_p (sectp->name, &names->loc_dwo))
+ {
+ dwp_file->sections.loc.s.asection = sectp;
+ dwp_file->sections.loc.size = bfd_get_section_size (sectp);
+ }
+ else if (section_is_p (sectp->name, &names->macinfo_dwo))
+ {
+ dwp_file->sections.macinfo.s.asection = sectp;
+ dwp_file->sections.macinfo.size = bfd_get_section_size (sectp);
+ }
+ else if (section_is_p (sectp->name, &names->macro_dwo))
+ {
+ dwp_file->sections.macro.s.asection = sectp;
+ dwp_file->sections.macro.size = bfd_get_section_size (sectp);
+ }
+ else if (section_is_p (sectp->name, &names->str_offsets_dwo))
+ {
+ dwp_file->sections.str_offsets.s.asection = sectp;
+ dwp_file->sections.str_offsets.size = bfd_get_section_size (sectp);
+ }
+ else if (section_is_p (sectp->name, &names->types_dwo))
+ {
+ dwp_file->sections.types.s.asection = sectp;
+ dwp_file->sections.types.size = bfd_get_section_size (sectp);
+ }
+}
+
/* Hash function for dwp_file loaded CUs/TUs. */
static hashval_t
dummy_obstack_deallocate);
}
+/* Try to open DWP file FILE_NAME.
+ 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_dwp_file (const char *file_name)
+{
+ bfd *abfd;
+
+ abfd = try_open_dwop_file (file_name, 1 /*is_dwp*/, 1 /*search_cwd*/);
+ if (abfd != NULL)
+ return abfd;
+
+ /* Work around upstream bug 15652.
+ http://sourceware.org/bugzilla/show_bug.cgi?id=15652
+ [Whether that's a "bug" is debatable, but it is getting in our way.]
+ We have no real idea where the dwp file is, because gdb's realpath-ing
+ of the executable's path may have discarded the needed info.
+ [IWBN if the dwp file name was recorded in the executable, akin to
+ .gnu_debuglink, but that doesn't exist yet.]
+ Strip the directory from FILE_NAME and search again. */
+ if (*debug_file_directory != '\0')
+ {
+ /* Don't implicitly search the current directory here.
+ If the user wants to search "." to handle this case,
+ it must be added to debug-file-directory. */
+ return try_open_dwop_file (lbasename (file_name), 1 /*is_dwp*/,
+ 0 /*search_cwd*/);
+ }
+
+ return NULL;
+}
+
/* Initialize the use of the DWP file for the current objfile.
By convention the name of the DWP file is ${objfile}.dwp.
The result is NULL if it can't be found. */
static struct dwp_file *
-open_and_init_dwp_file (const char *comp_dir)
+open_and_init_dwp_file (void)
{
struct objfile *objfile = dwarf2_per_objfile->objfile;
struct dwp_file *dwp_file;
bfd *dbfd;
struct cleanup *cleanups;
- dwp_name = xstrprintf ("%s.dwp", dwarf2_per_objfile->objfile->name);
+ /* Try to find first .dwp for the binary file before any symbolic links
+ resolving. */
+ dwp_name = xstrprintf ("%s.dwp", objfile->original_name);
cleanups = make_cleanup (xfree, dwp_name);
- dbfd = open_dwop_file (dwp_name, comp_dir, 1);
+ dbfd = open_dwp_file (dwp_name);
+ if (dbfd == NULL
+ && strcmp (objfile->original_name, objfile_name (objfile)) != 0)
+ {
+ /* Try to find .dwp for the binary file after gdb_realpath resolving. */
+ dwp_name = xstrprintf ("%s.dwp", objfile_name (objfile));
+ make_cleanup (xfree, dwp_name);
+ dbfd = open_dwp_file (dwp_name);
+ }
+
if (dbfd == NULL)
{
if (dwarf2_read_debug)
return NULL;
}
dwp_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_file);
- dwp_file->name = obstack_copy0 (&objfile->objfile_obstack,
- dwp_name, strlen (dwp_name));
+ dwp_file->name = bfd_get_filename (dbfd);
dwp_file->dbfd = dbfd;
do_cleanups (cleanups);
- cleanups = make_cleanup (free_dwo_file_cleanup, dwp_file);
-
/* +1: section 0 is unused */
dwp_file->num_sections = bfd_count_sections (dbfd) + 1;
dwp_file->elf_sections =
OBSTACK_CALLOC (&objfile->objfile_obstack,
dwp_file->num_sections, asection *);
- bfd_map_over_sections (dbfd, dwarf2_locate_dwp_sections, dwp_file);
+ bfd_map_over_sections (dbfd, dwarf2_locate_common_dwp_sections, dwp_file);
dwp_file->cus = create_dwp_hash_table (dwp_file, 0);
dwp_file->tus = create_dwp_hash_table (dwp_file, 1);
- dwp_file->loaded_cutus = allocate_dwp_loaded_cutus_table (objfile);
+ /* The DWP file version is stored in the hash table. Oh well. */
+ if (dwp_file->cus->version != dwp_file->tus->version)
+ {
+ /* Technically speaking, we should try to limp along, but this is
+ pretty bizarre. We use pulongest here because that's the established
+ portability solution (e.g, we can use %u for uint32_t). */
+ error (_("Dwarf Error: DWP file CU version %s doesn't match"
+ " TU version %s [in DWP file %s]"),
+ pulongest (dwp_file->cus->version),
+ pulongest (dwp_file->tus->version), dwp_name);
+ }
+ dwp_file->version = dwp_file->cus->version;
+
+ if (dwp_file->version == 2)
+ bfd_map_over_sections (dbfd, dwarf2_locate_v2_dwp_sections, dwp_file);
- discard_cleanups (cleanups);
+ dwp_file->loaded_cus = allocate_dwp_loaded_cutus_table (objfile);
+ dwp_file->loaded_tus = allocate_dwp_loaded_cutus_table (objfile);
if (dwarf2_read_debug)
{
fprintf_unfiltered (gdb_stdlog, "DWP file found: %s\n", dwp_file->name);
fprintf_unfiltered (gdb_stdlog,
- " %u CUs, %u TUs\n",
- dwp_file->cus ? dwp_file->cus->nr_units : 0,
- dwp_file->tus ? dwp_file->tus->nr_units : 0);
+ " %s CUs, %s TUs\n",
+ pulongest (dwp_file->cus ? dwp_file->cus->nr_units : 0),
+ pulongest (dwp_file->tus ? dwp_file->tus->nr_units : 0));
}
return dwp_file;
}
+/* Wrapper around open_and_init_dwp_file, only open it once. */
+
+static struct dwp_file *
+get_dwp_file (void)
+{
+ if (! dwarf2_per_objfile->dwp_checked)
+ {
+ dwarf2_per_objfile->dwp_file = open_and_init_dwp_file ();
+ dwarf2_per_objfile->dwp_checked = 1;
+ }
+ return dwarf2_per_objfile->dwp_file;
+}
+
/* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
or in the DWP file for the objfile, referenced by THIS_UNIT.
struct dwo_file *dwo_file;
struct dwp_file *dwp_file;
- /* Have we already read SIGNATURE from a DWP file? */
-
- if (! dwarf2_per_objfile->dwp_checked)
- {
- dwarf2_per_objfile->dwp_file = open_and_init_dwp_file (comp_dir);
- dwarf2_per_objfile->dwp_checked = 1;
- }
- dwp_file = dwarf2_per_objfile->dwp_file;
+ /* First see if there's a DWP file.
+ If we have a DWP file but didn't find the DWO inside it, don't
+ look for the original DWO file. It makes gdb behave differently
+ depending on whether one is debugging in the build tree. */
+ dwp_file = get_dwp_file ();
if (dwp_file != NULL)
{
const struct dwp_hash_table *dwp_htab =
if (dwp_htab != NULL)
{
struct dwo_unit *dwo_cutu =
- lookup_dwo_in_dwp (dwp_file, dwp_htab, signature, is_debug_types);
+ lookup_dwo_unit_in_dwp (dwp_file, comp_dir,
+ signature, is_debug_types);
if (dwo_cutu != NULL)
{
}
}
}
-
- /* Have we already seen DWO_NAME? */
-
- dwo_file_slot = lookup_dwo_file_slot (dwo_name);
- if (*dwo_file_slot == NULL)
+ else
{
- /* Read in the file and build a table of the DWOs it contains. */
- *dwo_file_slot = open_and_init_dwo_file (dwo_name, comp_dir);
- }
- /* NOTE: This will be NULL if unable to open the file. */
- dwo_file = *dwo_file_slot;
+ /* No DWP file, look for the DWO file. */
- if (dwo_file != NULL)
- {
- htab_t htab = is_debug_types ? dwo_file->tus : dwo_file->cus;
+ dwo_file_slot = lookup_dwo_file_slot (dwo_name, comp_dir);
+ if (*dwo_file_slot == NULL)
+ {
+ /* Read in the file and build a table of the CUs/TUs it contains. */
+ *dwo_file_slot = open_and_init_dwo_file (this_unit, dwo_name, comp_dir);
+ }
+ /* NOTE: This will be NULL if unable to open the file. */
+ dwo_file = *dwo_file_slot;
- if (htab != NULL)
+ if (dwo_file != NULL)
{
- struct dwo_unit find_dwo_cutu, *dwo_cutu;
+ struct dwo_unit *dwo_cutu = NULL;
+
+ if (is_debug_types && dwo_file->tus)
+ {
+ struct dwo_unit find_dwo_cutu;
- memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu));
- find_dwo_cutu.signature = signature;
- dwo_cutu = htab_find (htab, &find_dwo_cutu);
+ memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu));
+ find_dwo_cutu.signature = signature;
+ dwo_cutu = htab_find (dwo_file->tus, &find_dwo_cutu);
+ }
+ else if (!is_debug_types && dwo_file->cu)
+ {
+ if (signature == dwo_file->cu->signature)
+ dwo_cutu = dwo_file->cu;
+ }
if (dwo_cutu != NULL)
{
kind, dwo_name, hex_string (signature));
}
- complaint (&symfile_complaints,
- _("Could not find DWO CU referenced by CU at offset 0x%x"
+ /* This is a warning and not a complaint because it can be caused by
+ pilot error (e.g., user accidentally deleting the DWO). */
+ {
+ /* Print the name of the DWP file if we looked there, helps the user
+ better diagnose the problem. */
+ char *dwp_text = NULL;
+ struct cleanup *cleanups;
+
+ if (dwp_file != NULL)
+ dwp_text = xstrprintf (" [in DWP file %s]", lbasename (dwp_file->name));
+ cleanups = make_cleanup (xfree, dwp_text);
+
+ warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x"
" [in module %s]"),
- this_unit->offset.sect_off, objfile->name);
+ kind, dwo_name, hex_string (signature),
+ dwp_text != NULL ? dwp_text : "",
+ this_unit->is_debug_types ? "TU" : "CU",
+ this_unit->offset.sect_off, objfile_name (objfile));
+
+ do_cleanups (cleanups);
+ }
return NULL;
}
return lookup_dwo_cutu (&this_tu->per_cu, dwo_name, comp_dir, this_tu->signature, 1);
}
+/* Traversal function for queue_and_load_all_dwo_tus. */
+
+static int
+queue_and_load_dwo_tu (void **slot, void *info)
+{
+ struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot;
+ struct dwarf2_per_cu_data *per_cu = (struct dwarf2_per_cu_data *) info;
+ ULONGEST signature = dwo_unit->signature;
+ struct signatured_type *sig_type =
+ lookup_dwo_signatured_type (per_cu->cu, signature);
+
+ if (sig_type != NULL)
+ {
+ struct dwarf2_per_cu_data *sig_cu = &sig_type->per_cu;
+
+ /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
+ a real dependency of PER_CU on SIG_TYPE. That is detected later
+ while processing PER_CU. */
+ if (maybe_queue_comp_unit (NULL, sig_cu, per_cu->cu->language))
+ load_full_type_unit (sig_cu);
+ VEC_safe_push (dwarf2_per_cu_ptr, per_cu->imported_symtabs, sig_cu);
+ }
+
+ return 1;
+}
+
+/* Queue all TUs contained in the DWO of PER_CU to be read in.
+ The DWO may have the only definition of the type, though it may not be
+ referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
+ http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
+
+static void
+queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *per_cu)
+{
+ struct dwo_unit *dwo_unit;
+ struct dwo_file *dwo_file;
+
+ gdb_assert (!per_cu->is_debug_types);
+ gdb_assert (get_dwp_file () == NULL);
+ gdb_assert (per_cu->cu != NULL);
+
+ dwo_unit = per_cu->cu->dwo_unit;
+ gdb_assert (dwo_unit != NULL);
+
+ dwo_file = dwo_unit->dwo_file;
+ if (dwo_file->tus != NULL)
+ htab_traverse_noresize (dwo_file->tus, queue_and_load_dwo_tu, per_cu);
+}
+
/* Free all resources associated with DWO_FILE.
Close the DWO file and munmap the sections.
All memory should be on the objfile obstack. */
int ix;
struct dwarf2_section_info *section;
+ /* Note: dbfd is NULL for virtual DWO files. */
gdb_bfd_unref (dwo_file->dbfd);
VEC_free (dwarf2_section_info_def, dwo_file->sections.types);
if (child_die->tag == DW_TAG_template_type_param
|| child_die->tag == DW_TAG_template_value_param)
{
- templ_func = OBSTACK_ZALLOC (&objfile->objfile_obstack,
- struct template_symbol);
+ templ_func = allocate_template_symbol (objfile);
templ_func->base.is_cplus_template_function = 1;
break;
}
complaint (&symfile_complaints,
_("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
"DIE 0x%x [in module %s]"),
- die->offset.sect_off, objfile->name);
+ die->offset.sect_off, objfile_name (objfile));
return;
}
pc = DW_ADDR (attr) + baseaddr;
complaint (&symfile_complaints,
_("Duplicate PC %s for DW_TAG_GNU_call_site "
"DIE 0x%x [in module %s]"),
- paddress (gdbarch, pc), die->offset.sect_off, objfile->name);
+ paddress (gdbarch, pc), die->offset.sect_off,
+ objfile_name (objfile));
return;
}
complaint (&symfile_complaints,
_("Tag %d is not DW_TAG_GNU_call_site_parameter in "
"DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
- child_die->tag, child_die->offset.sect_off, objfile->name);
+ child_die->tag, child_die->offset.sect_off,
+ objfile_name (objfile));
continue;
}
complaint (&symfile_complaints,
_("Cannot find function owning DW_TAG_GNU_call_site "
"DIE 0x%x [in module %s]"),
- die->offset.sect_off, objfile->name);
+ die->offset.sect_off, objfile_name (objfile));
}
}
SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton);
}
- else if (is_ref_attr (attr))
+ else if (attr_form_is_ref (attr))
{
struct dwarf2_cu *target_cu = cu;
struct die_info *target_die;
- target_die = follow_die_ref_or_sig (die, attr, &target_cu);
+ target_die = follow_die_ref (die, attr, &target_cu);
gdb_assert (target_cu->objfile == objfile);
if (die_is_declaration (target_die, target_cu))
{
complaint (&symfile_complaints,
_("DW_AT_GNU_call_site_target target DIE has invalid "
"physname, for referencing DIE 0x%x [in module %s]"),
- die->offset.sect_off, objfile->name);
+ die->offset.sect_off, objfile_name (objfile));
else
SET_FIELD_PHYSNAME (call_site->target, target_physname);
}
complaint (&symfile_complaints,
_("DW_AT_GNU_call_site_target target DIE has invalid "
"low pc, for referencing DIE 0x%x [in module %s]"),
- die->offset.sect_off, objfile->name);
+ die->offset.sect_off, objfile_name (objfile));
else
SET_FIELD_PHYSADDR (call_site->target, lowpc + baseaddr);
}
complaint (&symfile_complaints,
_("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
"block nor reference, for DIE 0x%x [in module %s]"),
- die->offset.sect_off, objfile->name);
+ die->offset.sect_off, objfile_name (objfile));
call_site->per_cu = cu->per_cu;
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))
+ if (loc == NULL && origin != NULL && attr_form_is_ref (origin))
{
sect_offset offset;
_("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);
+ child_die->offset.sect_off, objfile_name (objfile));
continue;
}
parameter->u.param_offset.cu_off = (offset.sect_off
complaint (&symfile_complaints,
_("No 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);
+ child_die->offset.sect_off, objfile_name (objfile));
continue;
}
else
"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);
+ child_die->offset.sect_off, objfile_name (objfile));
continue;
}
}
complaint (&symfile_complaints,
_("No DW_FORM_block* DW_AT_GNU_call_site_value for "
"DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
- child_die->offset.sect_off, objfile->name);
+ child_die->offset.sect_off, objfile_name (objfile));
continue;
}
parameter->value = DW_BLOCK (attr)->data;
complaint (&symfile_complaints,
_("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
"DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
- child_die->offset.sect_off, objfile->name);
+ child_die->offset.sect_off, objfile_name (objfile));
else
{
parameter->data_value = DW_BLOCK (attr)->data;
CORE_ADDR base;
int found_base;
unsigned int dummy;
- gdb_byte *buffer;
+ const gdb_byte *buffer;
CORE_ADDR marker;
int low_set;
CORE_ADDR low = 0;
{
complaint (&symfile_complaints,
_(".debug_ranges entry has start address of zero"
- " [in module %s]"), objfile->name);
+ " [in module %s]"), objfile_name (objfile));
continue;
}
address range list in the .debug_ranges section. */
unsigned long offset = (DW_UNSND (attr)
+ (need_ranges_base ? cu->ranges_base : 0));
- gdb_byte *buffer = dwarf2_per_objfile->ranges.buffer + offset;
+ const gdb_byte *buffer;
/* For some target architectures, but not others, the
read_address function sign-extends the addresses it returns.
CORE_ADDR base = cu->base_address;
int base_known = cu->base_known;
- gdb_assert (dwarf2_per_objfile->ranges.readin);
+ dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges);
if (offset >= dwarf2_per_objfile->ranges.size)
{
complaint (&symfile_complaints,
offset);
return;
}
+ buffer = dwarf2_per_objfile->ranges.buffer + offset;
for (;;)
{
{
complaint (&symfile_complaints,
_(".debug_ranges entry has start address of zero"
- " [in module %s]"), objfile->name);
+ " [in module %s]"), objfile_name (objfile));
continue;
}
/* 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
- processed until process_structure_type.
+ processed until process_structure_scope.
NOTE: we need to call these functions regardless of whether or not the
DIE has a DW_AT_name attribute, since it might be an anonymous
attr = dwarf2_attr_no_follow (die, DW_AT_signature);
if (attr)
{
- struct dwarf2_cu *type_cu = cu;
- struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
-
- /* We could just recurse on read_structure_type, but we need to call
- get_die_type to ensure only one type for this DIE is created.
- This is important, for example, because for c++ classes we need
- TYPE_NAME set which is only done by new_symbol. Blech. */
- type = read_type_die (type_die, type_cu);
+ type = get_DW_AT_signature_type (die, attr, cu);
- /* TYPE_CU may not be the same as CU.
- Ensure TYPE is recorded in CU's type_hash table. */
+ /* The type's CU may not be the same as CU.
+ Ensure TYPE is recorded with CU in die_type_hash. */
return set_die_type (die, type, cu);
}
attr = dwarf2_attr_no_follow (die, DW_AT_signature);
if (attr)
{
- struct dwarf2_cu *type_cu = cu;
- struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
-
- type = read_type_die (type_die, type_cu);
+ type = get_DW_AT_signature_type (die, attr, cu);
- /* TYPE_CU may not be the same as CU.
- Ensure TYPE is recorded in CU's type_hash table. */
+ /* The type's CU may not be the same as CU.
+ Ensure TYPE is recorded with CU in die_type_hash. */
return set_die_type (die, type, cu);
}
{
struct signatured_type *sig_type;
- sig_type
- = lookup_signatured_type_at_offset (dwarf2_per_objfile->objfile,
- cu->per_cu->section,
- cu->per_cu->offset);
+ sig_type = (struct signatured_type *) cu->per_cu;
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;
_("Variable in common block has "
"DW_AT_data_member_location "
"- DIE at 0x%x [in module %s]"),
- child_die->offset.sect_off, cu->objfile->name);
+ child_die->offset.sect_off,
+ objfile_name (cu->objfile));
if (attr_form_is_section_offset (member_loc))
dwarf2_complex_location_expr_complaint ();
type = read_type_die (ext_die, ext_cu);
/* EXT_CU may not be the same as CU.
- Ensure TYPE is recorded in CU's type_hash table. */
+ Ensure TYPE is recorded with CU in die_type_hash. */
return set_die_type (die, type, cu);
}
read_module (struct die_info *die, struct dwarf2_cu *cu)
{
struct die_info *child_die = die->child;
+ struct type *type;
+
+ type = read_type_die (die, cu);
+ new_symbol (die, type, cu);
while (child_die && child_die->tag)
{
return set_die_type (die, type, cu);
}
+/* Assuming that DIE corresponds to a function, returns nonzero
+ if the function is prototyped. */
+
+static int
+prototyped_function_p (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct attribute *attr;
+
+ attr = dwarf2_attr (die, DW_AT_prototyped, cu);
+ if (attr && (DW_UNSND (attr) != 0))
+ return 1;
+
+ /* The DWARF standard implies that the DW_AT_prototyped attribute
+ is only meaninful for C, but the concept also extends to other
+ languages that allow unprototyped functions (Eg: Objective C).
+ For all other languages, assume that functions are always
+ prototyped. */
+ if (cu->language != language_c
+ && cu->language != language_objc
+ && cu->language != language_opencl)
+ return 1;
+
+ /* RealView does not emit DW_AT_prototyped. We can not distinguish
+ prototyped and unprototyped functions; default to prototyped,
+ since that is more common in modern code (and RealView warns
+ about unprototyped functions). */
+ if (producer_is_realview (cu->producer))
+ return 1;
+
+ return 0;
+}
+
/* Handle DIES due to C code like:
struct foo
ftype = lookup_function_type (type);
- /* All functions in C++, Pascal and Java have prototypes. */
- attr = dwarf2_attr (die, DW_AT_prototyped, cu);
- if ((attr && (DW_UNSND (attr) != 0))
- || cu->language == language_cplus
- || cu->language == language_java
- || cu->language == language_pascal)
- TYPE_PROTOTYPED (ftype) = 1;
- else if (producer_is_realview (cu->producer))
- /* RealView does not emit DW_AT_prototyped. We can not
- distinguish prototyped and unprototyped functions; default to
- prototyped, since that is more common in modern code (and
- RealView warns about unprototyped functions). */
+ if (prototyped_function_p (die, cu))
TYPE_PROTOTYPED (ftype) = 1;
/* Store the calling convention in the type if it's available in
complaint (&symfile_complaints,
_("Self-referential DW_TAG_typedef "
"- DIE at 0x%x [in module %s]"),
- die->offset.sect_off, objfile->name);
+ die->offset.sect_off, objfile_name (objfile));
TYPE_TARGET_TYPE (this_type) = NULL;
}
return this_type;
else if (!low_default_is_valid)
complaint (&symfile_complaints, _("Missing DW_AT_lower_bound "
"- DIE at 0x%x [in module %s]"),
- die->offset.sect_off, cu->objfile->name);
+ die->offset.sect_off, objfile_name (cu->objfile));
attr = dwarf2_attr (die, DW_AT_upper_bound, cu);
if (attr)
{
- if (attr_form_is_block (attr) || is_ref_attr (attr))
+ if (attr_form_is_block (attr) || attr_form_is_ref (attr))
{
/* GCC encodes arrays with unspecified or dynamic length
with a DW_FORM_block1 attribute or a reference attribute.
static struct die_info *
read_die_and_children (const struct die_reader_specs *reader,
- gdb_byte *info_ptr,
- gdb_byte **new_info_ptr,
+ const gdb_byte *info_ptr,
+ const gdb_byte **new_info_ptr,
struct die_info *parent)
{
struct die_info *die;
- gdb_byte *cur_ptr;
+ const gdb_byte *cur_ptr;
int has_children;
- cur_ptr = read_full_die (reader, &die, info_ptr, &has_children);
+ cur_ptr = read_full_die_1 (reader, &die, info_ptr, &has_children, 0);
if (die == NULL)
{
*new_info_ptr = cur_ptr;
store_in_ref_table (die, reader->cu);
if (has_children)
- die->child = read_die_and_siblings (reader, cur_ptr, new_info_ptr, die);
+ die->child = read_die_and_siblings_1 (reader, cur_ptr, new_info_ptr, die);
else
{
die->child = NULL;
in read_die_and_children. */
static struct die_info *
-read_die_and_siblings (const struct die_reader_specs *reader,
- gdb_byte *info_ptr,
- gdb_byte **new_info_ptr,
- struct die_info *parent)
+read_die_and_siblings_1 (const struct die_reader_specs *reader,
+ const gdb_byte *info_ptr,
+ const gdb_byte **new_info_ptr,
+ struct die_info *parent)
{
struct die_info *first_die, *last_sibling;
- gdb_byte *cur_ptr;
+ const gdb_byte *cur_ptr;
cur_ptr = info_ptr;
first_die = last_sibling = NULL;
}
}
+/* Read a die, all of its descendents, and all of its siblings; set
+ all of the fields of all of the dies correctly. Arguments are as
+ in read_die_and_children.
+ This the main entry point for reading a DIE and all its children. */
+
+static struct die_info *
+read_die_and_siblings (const struct die_reader_specs *reader,
+ const gdb_byte *info_ptr,
+ const gdb_byte **new_info_ptr,
+ struct die_info *parent)
+{
+ struct die_info *die = read_die_and_siblings_1 (reader, info_ptr,
+ new_info_ptr, parent);
+
+ if (dwarf2_die_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog,
+ "Read die from %s@0x%x of %s:\n",
+ get_section_name (reader->die_section),
+ (unsigned) (info_ptr - reader->die_section->buffer),
+ bfd_get_filename (reader->abfd));
+ dump_die (die, dwarf2_die_debug);
+ }
+
+ return die;
+}
+
/* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
attributes.
The caller is responsible for filling in the extra attributes
except for its child, sibling, and parent fields.
Set HAS_CHILDREN to tell whether the die has children or not. */
-static gdb_byte *
+static const gdb_byte *
read_full_die_1 (const struct die_reader_specs *reader,
- struct die_info **diep, gdb_byte *info_ptr,
+ struct die_info **diep, const gdb_byte *info_ptr,
int *has_children, int num_extra_attrs)
{
unsigned int abbrev_number, bytes_read, i;
except for its child, sibling, and parent fields.
Set HAS_CHILDREN to tell whether the die has children or not. */
-static gdb_byte *
+static const gdb_byte *
read_full_die (const struct die_reader_specs *reader,
- struct die_info **diep, gdb_byte *info_ptr,
+ struct die_info **diep, const gdb_byte *info_ptr,
int *has_children)
{
- return read_full_die_1 (reader, diep, info_ptr, has_children, 0);
+ const gdb_byte *result;
+
+ result = read_full_die_1 (reader, diep, info_ptr, has_children, 0);
+
+ if (dwarf2_die_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog,
+ "Read die from %s@0x%x of %s:\n",
+ get_section_name (reader->die_section),
+ (unsigned) (info_ptr - reader->die_section->buffer),
+ bfd_get_filename (reader->abfd));
+ dump_die (*diep, dwarf2_die_debug);
+ }
+
+ return result;
}
\f
/* Abbreviation tables.
sect_offset offset)
{
struct objfile *objfile = dwarf2_per_objfile->objfile;
- bfd *abfd = section->asection->owner;
+ bfd *abfd = get_section_bfd_owner (section);
struct abbrev_table *abbrev_table;
- gdb_byte *abbrev_ptr;
+ const gdb_byte *abbrev_ptr;
struct abbrev_info *cur_abbrev;
unsigned int abbrev_number, bytes_read, abbrev_name;
unsigned int abbrev_form;
struct attr_abbrev *cur_attrs;
unsigned int allocated_attrs;
- abbrev_table = XMALLOC (struct abbrev_table);
+ abbrev_table = XNEW (struct abbrev_table);
abbrev_table->offset = offset;
obstack_init (&abbrev_table->abbrev_obstack);
abbrev_table->abbrevs = obstack_alloc (&abbrev_table->abbrev_obstack,
{
struct dwarf2_cu *cu = ptr_to_cu;
- abbrev_table_free (cu->abbrev_table);
+ if (cu->abbrev_table != NULL)
+ 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;
static struct partial_die_info *
load_partial_dies (const struct die_reader_specs *reader,
- gdb_byte *info_ptr, int building_psymtab)
+ const gdb_byte *info_ptr, int building_psymtab)
{
struct dwarf2_cu *cu = reader->cu;
struct objfile *objfile = cu->objfile;
&& abbrev->tag != DW_TAG_namespace
&& abbrev->tag != DW_TAG_module
&& abbrev->tag != DW_TAG_member
- && abbrev->tag != DW_TAG_imported_unit)
+ && abbrev->tag != DW_TAG_imported_unit
+ && abbrev->tag != DW_TAG_imported_declaration)
{
/* Otherwise we skip to the next sibling, if any. */
info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev);
complaint (&symfile_complaints,
_("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
"- DIE at 0x%x [in module %s]"),
- part_die->offset.sect_off, objfile->name);
+ part_die->offset.sect_off, objfile_name (objfile));
/* If we're at the second level, and we're an enumerator, and
our parent has no specification (meaning possibly lives in a
/* Read a minimal amount of information into the minimal die structure. */
-static gdb_byte *
+static const gdb_byte *
read_partial_die (const struct die_reader_specs *reader,
struct partial_die_info *part_die,
struct abbrev_info *abbrev, unsigned int abbrev_len,
- gdb_byte *info_ptr)
+ const gdb_byte *info_ptr)
{
struct dwarf2_cu *cu = reader->cu;
struct objfile *objfile = cu->objfile;
- gdb_byte *buffer = reader->buffer;
+ const gdb_byte *buffer = reader->buffer;
unsigned int i;
struct attribute attr;
int has_low_pc_attr = 0;
complaint (&symfile_complaints,
_("ignoring absolute DW_AT_sibling"));
else
- part_die->sibling = buffer + dwarf2_get_ref_die_offset (&attr).sect_off;
+ {
+ unsigned int off = dwarf2_get_ref_die_offset (&attr).sect_off;
+ const gdb_byte *sibling_ptr = buffer + off;
+
+ if (sibling_ptr < info_ptr)
+ complaint (&symfile_complaints,
+ _("DW_AT_sibling points backwards"));
+ else
+ part_die->sibling = sibling_ptr;
+ }
break;
case DW_AT_byte_size:
part_die->has_byte_size = 1;
practice. */
if (DW_UNSND (&attr) == DW_CC_program
&& cu->language == language_fortran)
- {
- set_main_name (part_die->name);
-
- /* As this DIE has a static linkage the name would be difficult
- to look up later. */
- language_of_main = language_fortran;
- }
+ set_objfile_main_name (objfile, part_die->name, language_fortran);
break;
case DW_AT_inline:
if (DW_UNSND (&attr) == DW_INL_inlined
_("DW_AT_low_pc %s is zero "
"for DIE at 0x%x [in module %s]"),
paddress (gdbarch, part_die->lowpc),
- part_die->offset.sect_off, objfile->name);
+ part_die->offset.sect_off, objfile_name (objfile));
}
/* dwarf2_get_pc_bounds has also the strict low < high requirement. */
else if (part_die->lowpc >= part_die->highpc)
"for DIE at 0x%x [in module %s]"),
paddress (gdbarch, part_die->lowpc),
paddress (gdbarch, part_die->highpc),
- part_die->offset.sect_off, objfile->name);
+ part_die->offset.sect_off, objfile_name (objfile));
}
else
part_die->has_pc_info = 1;
{
char *demangled;
- demangled = cplus_demangle (part_die->linkage_name, DMGL_TYPES);
+ demangled = gdb_demangle (part_die->linkage_name, DMGL_TYPES);
if (demangled)
{
const char *base;
/* Read an attribute value described by an attribute form. */
-static gdb_byte *
+static const gdb_byte *
read_attribute_value (const struct die_reader_specs *reader,
struct attribute *attr, unsigned form,
- gdb_byte *info_ptr)
+ const gdb_byte *info_ptr)
{
struct dwarf2_cu *cu = reader->cu;
bfd *abfd = reader->abfd;
info_ptr += 8;
break;
case DW_FORM_ref_sig8:
- /* Convert the signature to something we can record in DW_UNSND
- for later lookup.
- NOTE: This is NULL if the type wasn't found. */
- DW_SIGNATURED_TYPE (attr) =
- lookup_signatured_type (read_8_bytes (abfd, info_ptr));
+ DW_SIGNATURE (attr) = read_8_bytes (abfd, info_ptr);
info_ptr += 8;
break;
case DW_FORM_ref_udata:
}
/* Super hack. */
- if (cu->per_cu->is_dwz && is_ref_attr (attr))
+ if (cu->per_cu->is_dwz && attr_form_is_ref (attr))
attr->form = DW_FORM_GNU_ref_alt;
/* We have seen instances where the compiler tried to emit a byte
/* Read an attribute described by an abbreviated attribute. */
-static gdb_byte *
+static const gdb_byte *
read_attribute (const struct die_reader_specs *reader,
struct attribute *attr, struct attr_abbrev *abbrev,
- gdb_byte *info_ptr)
+ const gdb_byte *info_ptr)
{
attr->name = abbrev->name;
return read_attribute_value (reader, attr, abbrev->form, info_ptr);
}
static CORE_ADDR
-read_address (bfd *abfd, gdb_byte *buf, struct dwarf2_cu *cu,
+read_address (bfd *abfd, const gdb_byte *buf, struct dwarf2_cu *cu,
unsigned int *bytes_read)
{
struct comp_unit_head *cu_header = &cu->header;
] */
static LONGEST
-read_initial_length (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read)
+read_initial_length (bfd *abfd, const gdb_byte *buf, unsigned int *bytes_read)
{
LONGEST length = bfd_get_32 (abfd, buf);
This is useful when reading non-comp-unit headers. */
static LONGEST
-read_checked_initial_length_and_offset (bfd *abfd, gdb_byte *buf,
+read_checked_initial_length_and_offset (bfd *abfd, const gdb_byte *buf,
const struct comp_unit_head *cu_header,
unsigned int *bytes_read,
unsigned int *offset_size)
given by cu_header->offset_size. */
static LONGEST
-read_offset (bfd *abfd, gdb_byte *buf, const struct comp_unit_head *cu_header,
+read_offset (bfd *abfd, const gdb_byte *buf,
+ const struct comp_unit_head *cu_header,
unsigned int *bytes_read)
{
LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size);
/* Read an offset from the data stream. */
static LONGEST
-read_offset_1 (bfd *abfd, gdb_byte *buf, unsigned int offset_size)
+read_offset_1 (bfd *abfd, const gdb_byte *buf, unsigned int offset_size)
{
LONGEST retval = 0;
return retval;
}
-static gdb_byte *
-read_n_bytes (bfd *abfd, gdb_byte *buf, unsigned int size)
+static const gdb_byte *
+read_n_bytes (bfd *abfd, const gdb_byte *buf, unsigned int size)
{
/* If the size of a host char is 8 bits, we can return a pointer
to the buffer, otherwise we have to copy the data to a buffer
return buf;
}
-static char *
-read_direct_string (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
+static const char *
+read_direct_string (bfd *abfd, const gdb_byte *buf,
+ unsigned int *bytes_read_ptr)
{
/* If the size of a host char is 8 bits, we can return a pointer
to the string, otherwise we have to copy the string to a buffer
*bytes_read_ptr = 1;
return NULL;
}
- *bytes_read_ptr = strlen ((char *) buf) + 1;
- return (char *) buf;
+ *bytes_read_ptr = strlen ((const char *) buf) + 1;
+ return (const char *) buf;
}
-static char *
+static const char *
read_indirect_string_at_offset (bfd *abfd, LONGEST str_offset)
{
dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->str);
gdb_assert (HOST_CHAR_BIT == 8);
if (dwarf2_per_objfile->str.buffer[str_offset] == '\0')
return NULL;
- return (char *) (dwarf2_per_objfile->str.buffer + str_offset);
+ return (const char *) (dwarf2_per_objfile->str.buffer + str_offset);
}
/* Read a string at offset STR_OFFSET in the .debug_str section from
the string consists of a single NUL byte, return NULL; otherwise
return a pointer to the string. */
-static char *
+static const char *
read_indirect_string_from_dwz (struct dwz_file *dwz, LONGEST str_offset)
{
dwarf2_read_section (dwarf2_per_objfile->objfile, &dwz->str);
gdb_assert (HOST_CHAR_BIT == 8);
if (dwz->str.buffer[str_offset] == '\0')
return NULL;
- return (char *) (dwz->str.buffer + str_offset);
+ return (const char *) (dwz->str.buffer + str_offset);
}
-static char *
-read_indirect_string (bfd *abfd, gdb_byte *buf,
+static const char *
+read_indirect_string (bfd *abfd, const gdb_byte *buf,
const struct comp_unit_head *cu_header,
unsigned int *bytes_read_ptr)
{
}
static ULONGEST
-read_unsigned_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
+read_unsigned_leb128 (bfd *abfd, const gdb_byte *buf,
+ unsigned int *bytes_read_ptr)
{
ULONGEST result;
unsigned int num_read;
}
static LONGEST
-read_signed_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
+read_signed_leb128 (bfd *abfd, const gdb_byte *buf,
+ unsigned int *bytes_read_ptr)
{
LONGEST result;
int i, shift, num_read;
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);
+ objfile_name (objfile));
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);
+ objfile_name (objfile));
info_ptr = (dwarf2_per_objfile->addr.buffer
+ addr_base + addr_index * addr_size);
if (addr_size == 4)
/* 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,
+read_addr_index_from_leb128 (struct dwarf2_cu *cu, const gdb_byte *info_ptr,
unsigned int *bytes_read)
{
bfd *abfd = cu->objfile->obfd;
static void
dwarf2_read_addr_index_reader (const struct die_reader_specs *reader,
- gdb_byte *info_ptr,
+ const gdb_byte *info_ptr,
struct die_info *comp_unit_die,
int has_children,
void *data)
return read_addr_index_1 (addr_index, addr_base, addr_size);
}
-/* Given a DW_AT_str_index, fetch the string. */
+/* Given a DW_FORM_GNU_str_index, fetch the string.
+ This is only used by the Fission support. */
-static char *
+static const 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;
+ const char *dwo_name = objfile_name (objfile);
bfd *abfd = objfile->obfd;
- struct dwo_sections *sections = &reader->dwo_file->sections;
- gdb_byte *info_ptr;
+ struct dwarf2_section_info *str_section = &reader->dwo_file->sections.str;
+ struct dwarf2_section_info *str_offsets_section =
+ &reader->dwo_file->sections.str_offsets;
+ const gdb_byte *info_ptr;
ULONGEST str_offset;
+ static const char form_name[] = "DW_FORM_GNU_str_index";
- 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"
+ dwarf2_read_section (objfile, str_section);
+ dwarf2_read_section (objfile, str_offsets_section);
+ if (str_section->buffer == NULL)
+ error (_("%s 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"
+ form_name, (long) cu->header.offset.sect_off, dwo_name);
+ if (str_offsets_section->buffer == NULL)
+ error (_("%s 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"
+ form_name, (long) cu->header.offset.sect_off, dwo_name);
+ if (str_index * cu->header.offset_size >= str_offsets_section->size)
+ error (_("%s 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
+ form_name, (long) cu->header.offset.sect_off, dwo_name);
+ info_ptr = (str_offsets_section->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"
+ if (str_offset >= str_section->size)
+ error (_("Offset from %s 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);
+ form_name, (long) cu->header.offset.sect_off, dwo_name);
+ return (const char *) (str_section->buffer + str_offset);
}
/* Return the length of an LEB128 number in BUF. */
case DW_LANG_C89:
case DW_LANG_C99:
case DW_LANG_C:
+ case DW_LANG_UPC:
cu->language = language_c;
break;
case DW_LANG_C_plus_plus:
/* Add an entry to LH's include directory table. */
static void
-add_include_dir (struct line_header *lh, char *include_dir)
+add_include_dir (struct line_header *lh, const char *include_dir)
{
/* Grow the array if necessary. */
if (lh->include_dirs_size == 0)
static void
add_file_name (struct line_header *lh,
- char *name,
+ const char *name,
unsigned int dir_index,
unsigned int mod_time,
unsigned int length)
{
struct cleanup *back_to;
struct line_header *lh;
- gdb_byte *line_ptr;
+ const gdb_byte *line_ptr;
unsigned int bytes_read, offset_size;
int i;
- char *cur_dir, *cur_file;
+ const char *cur_dir, *cur_file;
struct dwarf2_section_info *section;
bfd *abfd;
/* 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;
+ abfd = get_section_bfd_owner (section);
/* 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 (line_ptr + lh->total_length > (section->buffer + section->size))
{
dwarf2_statement_list_fits_in_line_number_section_complaint ();
+ do_cleanups (back_to);
return 0;
}
lh->statement_program_end = line_ptr + lh->total_length;
The function creates dangling cleanup registration. */
-static char *
+static const char *
psymtab_include_file_name (const struct line_header *lh, int file_index,
const struct partial_symtab *pst,
const char *comp_dir)
{
const struct file_entry fe = lh->file_names [file_index];
- char *include_name = fe.name;
- char *include_name_to_compare = include_name;
- char *dir_name = NULL;
+ const char *include_name = fe.name;
+ const char *include_name_to_compare = include_name;
+ const char *dir_name = NULL;
const char *pst_filename;
char *copied_name = NULL;
int file_is_pst;
if (dir_name != NULL)
{
- include_name = concat (dir_name, SLASH_STRING,
- include_name, (char *)NULL);
+ char *tem = concat (dir_name, SLASH_STRING,
+ include_name, (char *)NULL);
+
+ make_cleanup (xfree, tem);
+ include_name = tem;
include_name_to_compare = include_name;
- make_cleanup (xfree, include_name);
}
if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL)
{
- include_name_to_compare = concat (comp_dir, SLASH_STRING,
- include_name, (char *)NULL);
+ char *tem = concat (comp_dir, SLASH_STRING,
+ include_name, (char *)NULL);
+
+ make_cleanup (xfree, tem);
+ include_name_to_compare = tem;
}
}
file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0;
- if (include_name_to_compare != include_name)
- xfree (include_name_to_compare);
if (copied_name != NULL)
xfree (copied_name);
dwarf_decode_lines_1 (struct line_header *lh, const char *comp_dir,
struct dwarf2_cu *cu, struct partial_symtab *pst)
{
- gdb_byte *line_ptr, *extended_end;
- gdb_byte *line_end;
+ const gdb_byte *line_ptr, *extended_end;
+ const gdb_byte *line_end;
unsigned int bytes_read, extended_len;
unsigned char op_code, extended_op, adj_opcode;
CORE_ADDR baseaddr;
directory and file name numbers in the statement program
are 1-based. */
struct file_entry *fe = &lh->file_names[file - 1];
- char *dir = NULL;
+ const char *dir = NULL;
if (fe->dir_index)
dir = lh->include_dirs[fe->dir_index - 1];
complaint (&symfile_complaints,
_(".debug_line address at offset 0x%lx is 0 "
"[in module %s]"),
- line_offset, objfile->name);
+ line_offset, objfile_name (objfile));
p_record_line = noop_record_line;
}
break;
case DW_LNE_define_file:
{
- char *cur_file;
+ const char *cur_file;
unsigned int dir_index, mod_time, length;
cur_file = read_direct_string (abfd, line_ptr,
0-based, but the directory and file name numbers in
the statement program are 1-based. */
struct file_entry *fe;
- char *dir = NULL;
+ const char *dir = NULL;
file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
line_ptr += bytes_read;
for (file_index = 0; file_index < lh->num_file_names; file_index++)
if (lh->file_names[file_index].included_p == 1)
{
- char *include_name =
+ const char *include_name =
psymtab_include_file_name (lh, file_index, pst, comp_dir);
if (include_name != NULL)
dwarf2_create_include_psymtab (include_name, pst, objfile);
for (i = 0; i < lh->num_file_names; i++)
{
- char *dir = NULL;
+ const char *dir = NULL;
struct file_entry *fe;
fe = &lh->file_names[i];
subfile's name. */
static void
-dwarf2_start_subfile (char *filename, const char *dirname,
+dwarf2_start_subfile (const char *filename, const char *dirname,
const char *comp_dir)
{
- char *fullname;
+ char *copy = NULL;
/* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
`start_symtab' will always pass the contents of DW_AT_comp_dir as
`else' branch below isn't an issue. */
if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL)
- fullname = concat (dirname, SLASH_STRING, filename, (char *)NULL);
- else
- fullname = filename;
+ {
+ copy = concat (dirname, SLASH_STRING, filename, (char *)NULL);
+ filename = copy;
+ }
- start_subfile (fullname, comp_dir);
+ start_subfile (filename, comp_dir);
- if (fullname != filename)
- xfree (fullname);
+ if (copy != NULL)
+ xfree (copy);
}
/* Start a symtab for DWARF.
if (space)
sym = space;
else
- sym = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct symbol);
+ sym = allocate_symbol (objfile);
OBJSTAT (objfile, n_syms++);
/* Cache this symbol's name and the name's demangled form (if any). */
- SYMBOL_SET_LANGUAGE (sym, cu->language);
+ SYMBOL_SET_LANGUAGE (sym, cu->language, &objfile->objfile_obstack);
linkagename = dwarf2_physname (name, die, cu);
SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile);
? &global_symbols : cu->list_in_scope);
}
break;
+ case DW_TAG_imported_declaration:
case DW_TAG_namespace:
SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
list_to_add = &global_symbols;
break;
+ case DW_TAG_module:
+ SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
+ SYMBOL_DOMAIN (sym) = MODULE_DOMAIN;
+ list_to_add = &global_symbols;
+ break;
case DW_TAG_common_block:
SYMBOL_ACLASS_INDEX (sym) = LOC_COMMON_BLOCK;
SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN;
because that is the interpretation long in use by GCC. */
static gdb_byte *
-dwarf2_const_value_data (struct attribute *attr, struct type *type,
- const char *name, struct obstack *obstack,
+dwarf2_const_value_data (const struct attribute *attr, struct obstack *obstack,
struct dwarf2_cu *cu, LONGEST *value, int bits)
{
struct objfile *objfile = cu->objfile;
expression. */
static void
-dwarf2_const_value_attr (struct attribute *attr, struct type *type,
+dwarf2_const_value_attr (const struct attribute *attr, struct type *type,
const char *name, struct obstack *obstack,
struct dwarf2_cu *cu,
- LONGEST *value, gdb_byte **bytes,
+ LONGEST *value, const gdb_byte **bytes,
struct dwarf2_locexpr_baton **baton)
{
struct objfile *objfile = cu->objfile;
/* Symbols of this form are reasonably rare, so we just
piggyback on the existing location code rather than writing
a new implementation of symbol_computed_ops. */
- *baton = obstack_alloc (&objfile->objfile_obstack,
- sizeof (struct dwarf2_locexpr_baton));
+ *baton = obstack_alloc (obstack, sizeof (struct dwarf2_locexpr_baton));
(*baton)->per_cu = cu->per_cu;
gdb_assert ((*baton)->per_cu);
(*baton)->size = 2 + cu_header->addr_size;
- data = obstack_alloc (&objfile->objfile_obstack, (*baton)->size);
+ data = obstack_alloc (obstack, (*baton)->size);
(*baton)->data = data;
data[0] = DW_OP_addr;
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);
+ *bytes = (const gdb_byte *) DW_STRING (attr);
break;
case DW_FORM_block1:
case DW_FORM_block2:
converted to host endianness, so we just need to sign- or
zero-extend it as appropriate. */
case DW_FORM_data1:
- *bytes = dwarf2_const_value_data (attr, type, name,
- obstack, cu, value, 8);
+ *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 8);
break;
case DW_FORM_data2:
- *bytes = dwarf2_const_value_data (attr, type, name,
- obstack, cu, value, 16);
+ *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 16);
break;
case DW_FORM_data4:
- *bytes = dwarf2_const_value_data (attr, type, name,
- obstack, cu, value, 32);
+ *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 32);
break;
case DW_FORM_data8:
- *bytes = dwarf2_const_value_data (attr, type, name,
- obstack, cu, value, 64);
+ *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 64);
break;
case DW_FORM_sdata:
/* Copy constant value from an attribute to a symbol. */
static void
-dwarf2_const_value (struct attribute *attr, struct symbol *sym,
+dwarf2_const_value (const struct attribute *attr, struct symbol *sym,
struct dwarf2_cu *cu)
{
struct objfile *objfile = cu->objfile;
struct comp_unit_head *cu_header = &cu->header;
LONGEST value;
- gdb_byte *bytes;
+ const gdb_byte *bytes;
struct dwarf2_locexpr_baton *baton;
dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym),
type_attr = dwarf2_attr (die, DW_AT_containing_type, cu);
if (!type_attr)
error (_("Dwarf Error: Problem turning containing type into gdb type "
- "[in module %s]"), cu->objfile->name);
+ "[in module %s]"), objfile_name (cu->objfile));
return lookup_die_type (die, type_attr, cu);
}
+/* Return an error marker type to use for the ill formed type in DIE/CU. */
+
+static struct type *
+build_error_marker_type (struct dwarf2_cu *cu, struct die_info *die)
+{
+ struct objfile *objfile = dwarf2_per_objfile->objfile;
+ char *message, *saved;
+
+ message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
+ objfile_name (objfile),
+ cu->header.offset.sect_off,
+ die->offset.sect_off);
+ saved = obstack_copy0 (&objfile->objfile_obstack,
+ message, strlen (message));
+ xfree (message);
+
+ return init_type (TYPE_CODE_ERROR, 0, 0, saved, objfile);
+}
+
/* Look up the type of DIE in CU using its type attribute ATTR.
+ ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
+ DW_AT_containing_type.
If there is no type substitute an error marker. */
static struct type *
-lookup_die_type (struct die_info *die, struct attribute *attr,
+lookup_die_type (struct die_info *die, const struct attribute *attr,
struct dwarf2_cu *cu)
{
struct objfile *objfile = cu->objfile;
struct type *this_type;
+ gdb_assert (attr->name == DW_AT_type
+ || attr->name == DW_AT_GNAT_descriptive_type
+ || attr->name == DW_AT_containing_type);
+
/* First see if we have it cached. */
if (attr->form == DW_FORM_GNU_ref_alt)
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))
+ else if (attr_form_is_ref (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);
+ ULONGEST signature = DW_SIGNATURE (attr);
- /* sig_type will be NULL if the signatured type is missing from
- the debug info. */
- if (sig_type == NULL)
- error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
- "at 0x%x [in module %s]"),
- die->offset.sect_off, objfile->name);
-
- 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);
- }
+ return get_signatured_type (die, signature, cu);
}
else
{
- dump_die_for_error (die);
- error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
- dwarf_attr_name (attr->name), objfile->name);
+ complaint (&symfile_complaints,
+ _("Dwarf Error: Bad type attribute %s in DIE"
+ " at 0x%x [in module %s]"),
+ dwarf_attr_name (attr->name), die->offset.sect_off,
+ objfile_name (objfile));
+ return build_error_marker_type (cu, die);
}
/* If not cached we need to read it in. */
if (this_type == NULL)
{
- struct die_info *type_die;
+ struct die_info *type_die = NULL;
struct dwarf2_cu *type_cu = cu;
- type_die = follow_die_ref_or_sig (die, attr, &type_cu);
- /* If we found the type now, it's probably because the type came
+ if (attr_form_is_ref (attr))
+ type_die = follow_die_ref (die, attr, &type_cu);
+ if (type_die == NULL)
+ return build_error_marker_type (cu, die);
+ /* If we find 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);
+ this_type = read_type_die (type_die, type_cu);
}
/* If we still don't have a type use an error marker. */
if (this_type == NULL)
- {
- char *message, *saved;
-
- /* read_type_die already issued a complaint. */
- message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
- objfile->name,
- cu->header.offset.sect_off,
- die->offset.sect_off);
- saved = obstack_copy0 (&objfile->objfile_obstack,
- message, strlen (message));
- xfree (message);
-
- this_type = init_type (TYPE_CODE_ERROR, 0, 0, saved, objfile);
- }
+ return build_error_marker_type (cu, die);
return this_type;
}
/* Return the type in DIE, CU.
Returns NULL for invalid types.
- This first does a lookup in the appropriate type_hash table,
+ This first does a lookup in die_type_hash,
and only reads the die in if necessary.
NOTE: This can be called when reading in partial or full symbols. */
/* Avoid demangling DW_STRING (attr) the second time on a second
call for the same DIE. */
if (!DW_STRING_IS_CANONICAL (attr))
- demangled = cplus_demangle (DW_STRING (attr), DMGL_TYPES);
+ demangled = gdb_demangle (DW_STRING (attr), DMGL_TYPES);
if (demangled)
{
pulongest (DW_UNSND (&die->attrs[i])));
break;
case DW_FORM_ref_sig8:
- if (DW_SIGNATURED_TYPE (&die->attrs[i]) != NULL)
- {
- struct signatured_type *sig_type =
- DW_SIGNATURED_TYPE (&die->attrs[i]);
-
- fprintf_unfiltered (f, "signatured type: 0x%s, offset 0x%x",
- hex_string (sig_type->signature),
- sig_type->per_cu.offset.sect_off);
- }
- else
- fprintf_unfiltered (f, "signatured type, unknown");
+ fprintf_unfiltered (f, "signature: %s",
+ hex_string (DW_SIGNATURE (&die->attrs[i])));
break;
case DW_FORM_string:
case DW_FORM_strp:
*slot = die;
}
-/* DW_ADDR is always stored already as sect_offset; despite for the forms
- besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
-
-static int
-is_ref_attr (struct attribute *attr)
-{
- switch (attr->form)
- {
- case DW_FORM_ref_addr:
- case DW_FORM_ref1:
- case DW_FORM_ref2:
- case DW_FORM_ref4:
- case DW_FORM_ref8:
- case DW_FORM_ref_udata:
- case DW_FORM_GNU_ref_alt:
- return 1;
- default:
- return 0;
- }
-}
-
/* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
required kind. */
static sect_offset
-dwarf2_get_ref_die_offset (struct attribute *attr)
+dwarf2_get_ref_die_offset (const struct attribute *attr)
{
sect_offset retval = { DW_UNSND (attr) };
- if (is_ref_attr (attr))
+ if (attr_form_is_ref (attr))
return retval;
retval.sect_off = 0;
* the value held by the attribute is not constant. */
static LONGEST
-dwarf2_get_attr_constant_value (struct attribute *attr, int default_value)
+dwarf2_get_attr_constant_value (const struct attribute *attr, int default_value)
{
if (attr->form == DW_FORM_sdata)
return DW_SND (attr);
On exit *REF_CU is the CU of the result. */
static struct die_info *
-follow_die_ref_or_sig (struct die_info *src_die, struct attribute *attr,
+follow_die_ref_or_sig (struct die_info *src_die, const struct attribute *attr,
struct dwarf2_cu **ref_cu)
{
struct die_info *die;
- if (is_ref_attr (attr))
+ if (attr_form_is_ref (attr))
die = follow_die_ref (src_die, attr, ref_cu);
else if (attr->form == DW_FORM_ref_sig8)
die = follow_die_sig (src_die, attr, ref_cu);
{
dump_die_for_error (src_die);
error (_("Dwarf Error: Expected reference attribute [in module %s]"),
- (*ref_cu)->objfile->name);
+ objfile_name ((*ref_cu)->objfile));
}
return die;
On exit *REF_CU is the CU of the result. */
static struct die_info *
-follow_die_ref (struct die_info *src_die, struct attribute *attr,
+follow_die_ref (struct die_info *src_die, const struct attribute *attr,
struct dwarf2_cu **ref_cu)
{
sect_offset offset = dwarf2_get_ref_die_offset (attr);
if (!die)
error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
"at 0x%x [in module %s]"),
- offset.sect_off, src_die->offset.sect_off, cu->objfile->name);
+ offset.sect_off, src_die->offset.sect_off,
+ objfile_name (cu->objfile));
return die;
}
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);
+ offset.sect_off, objfile_name (per_cu->objfile));
attr = dwarf2_attr (die, DW_AT_location, cu);
if (!attr)
if (!attr_form_is_block (attr))
error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
"is neither DW_FORM_block* nor DW_FORM_exprloc"),
- offset.sect_off, per_cu->objfile->name);
+ offset.sect_off, objfile_name (per_cu->objfile));
retval.data = DW_BLOCK (attr)->data;
retval.size = DW_BLOCK (attr)->size;
return dwarf2_fetch_die_loc_sect_off (offset, per_cu, get_frame_pc, baton);
}
+/* Write a constant of a given type as target-ordered bytes into
+ OBSTACK. */
+
+static const gdb_byte *
+write_constant_as_bytes (struct obstack *obstack,
+ enum bfd_endian byte_order,
+ struct type *type,
+ ULONGEST value,
+ LONGEST *len)
+{
+ gdb_byte *result;
+
+ *len = TYPE_LENGTH (type);
+ result = obstack_alloc (obstack, *len);
+ store_unsigned_integer (result, *len, byte_order, value);
+
+ return result;
+}
+
+/* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
+ pointer to the constant bytes and set LEN to the length of the
+ data. If memory is needed, allocate it on OBSTACK. If the DIE
+ does not have a DW_AT_const_value, return NULL. */
+
+const gdb_byte *
+dwarf2_fetch_constant_bytes (sect_offset offset,
+ struct dwarf2_per_cu_data *per_cu,
+ struct obstack *obstack,
+ LONGEST *len)
+{
+ struct dwarf2_cu *cu;
+ struct die_info *die;
+ struct attribute *attr;
+ const gdb_byte *result = NULL;
+ struct type *type;
+ LONGEST value;
+ enum bfd_endian byte_order;
+
+ dw2_setup (per_cu->objfile);
+
+ if (per_cu->cu == NULL)
+ load_cu (per_cu);
+ cu = per_cu->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, objfile_name (per_cu->objfile));
+
+
+ attr = dwarf2_attr (die, DW_AT_const_value, cu);
+ if (attr == NULL)
+ return NULL;
+
+ byte_order = (bfd_big_endian (per_cu->objfile->obfd)
+ ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE);
+
+ switch (attr->form)
+ {
+ case DW_FORM_addr:
+ case DW_FORM_GNU_addr_index:
+ {
+ gdb_byte *tem;
+
+ *len = cu->header.addr_size;
+ tem = obstack_alloc (obstack, *len);
+ store_unsigned_integer (tem, *len, byte_order, DW_ADDR (attr));
+ result = tem;
+ }
+ 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. */
+ result = (const gdb_byte *) DW_STRING (attr);
+ *len = strlen (DW_STRING (attr));
+ break;
+ case DW_FORM_block1:
+ case DW_FORM_block2:
+ case DW_FORM_block4:
+ case DW_FORM_block:
+ case DW_FORM_exprloc:
+ result = DW_BLOCK (attr)->data;
+ *len = DW_BLOCK (attr)->size;
+ break;
+
+ /* The DW_AT_const_value attributes are supposed to carry the
+ symbol's value "represented as it would be on the target
+ architecture." By the time we get here, it's already been
+ converted to host endianness, so we just need to sign- or
+ zero-extend it as appropriate. */
+ case DW_FORM_data1:
+ type = die_type (die, cu);
+ result = dwarf2_const_value_data (attr, obstack, cu, &value, 8);
+ if (result == NULL)
+ result = write_constant_as_bytes (obstack, byte_order,
+ type, value, len);
+ break;
+ case DW_FORM_data2:
+ type = die_type (die, cu);
+ result = dwarf2_const_value_data (attr, obstack, cu, &value, 16);
+ if (result == NULL)
+ result = write_constant_as_bytes (obstack, byte_order,
+ type, value, len);
+ break;
+ case DW_FORM_data4:
+ type = die_type (die, cu);
+ result = dwarf2_const_value_data (attr, obstack, cu, &value, 32);
+ if (result == NULL)
+ result = write_constant_as_bytes (obstack, byte_order,
+ type, value, len);
+ break;
+ case DW_FORM_data8:
+ type = die_type (die, cu);
+ result = dwarf2_const_value_data (attr, obstack, cu, &value, 64);
+ if (result == NULL)
+ result = write_constant_as_bytes (obstack, byte_order,
+ type, value, len);
+ break;
+
+ case DW_FORM_sdata:
+ type = die_type (die, cu);
+ result = write_constant_as_bytes (obstack, byte_order,
+ type, DW_SND (attr), len);
+ break;
+
+ case DW_FORM_udata:
+ type = die_type (die, cu);
+ result = write_constant_as_bytes (obstack, byte_order,
+ type, DW_UNSND (attr), len);
+ break;
+
+ default:
+ complaint (&symfile_complaints,
+ _("unsupported const value attribute form: '%s'"),
+ dwarf_form_name (attr->form));
+ break;
+ }
+
+ return result;
+}
+
/* Return the type of the DIE at DIE_OFFSET in the CU named by
PER_CU. */
return get_die_type_at_offset (die_offset_sect, per_cu);
}
-/* Follow the signature attribute ATTR in SRC_DIE.
+/* Follow type unit SIG_TYPE referenced by SRC_DIE.
On entry *REF_CU is the CU of SRC_DIE.
- On exit *REF_CU is the CU of the result. */
+ On exit *REF_CU is the CU of the result.
+ Returns NULL if the referenced DIE isn't found. */
static struct die_info *
-follow_die_sig (struct die_info *src_die, struct attribute *attr,
- struct dwarf2_cu **ref_cu)
+follow_die_sig_1 (struct die_info *src_die, struct signatured_type *sig_type,
+ struct dwarf2_cu **ref_cu)
{
struct objfile *objfile = (*ref_cu)->objfile;
struct die_info temp_die;
- struct signatured_type *sig_type = DW_SIGNATURED_TYPE (attr);
struct dwarf2_cu *sig_cu;
struct die_info *die;
- /* sig_type will be NULL if the signatured type is missing from
- the debug info. */
- if (sig_type == NULL)
- error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
- "at 0x%x [in module %s]"),
- src_die->offset.sect_off, objfile->name);
+ /* While it might be nice to assert sig_type->type == NULL here,
+ we can get here for DW_AT_imported_declaration where we need
+ the DIE not the type. */
/* If necessary, add it to the queue and load its DIEs. */
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;
+ gdb_assert (sig_cu != NULL);
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,
return die;
}
- error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced "
- "from DIE at 0x%x [in module %s]"),
- temp_die.offset.sect_off, src_die->offset.sect_off, objfile->name);
+ return NULL;
}
-/* Given an offset of a signatured type, return its signatured_type. */
+/* Follow signatured type referenced by ATTR in SRC_DIE.
+ On entry *REF_CU is the CU of SRC_DIE.
+ On exit *REF_CU is the CU of the result.
+ The result is the DIE of the type.
+ If the referenced type cannot be found an error is thrown. */
-static struct signatured_type *
-lookup_signatured_type_at_offset (struct objfile *objfile,
- struct dwarf2_section_info *section,
- sect_offset offset)
-{
- gdb_byte *info_ptr = section->buffer + offset.sect_off;
- unsigned int length, initial_length_size;
- unsigned int sig_offset;
- struct signatured_type find_entry, *sig_type;
-
- length = read_initial_length (objfile->obfd, info_ptr, &initial_length_size);
- sig_offset = (initial_length_size
- + 2 /*version*/
- + (initial_length_size == 4 ? 4 : 8) /*debug_abbrev_offset*/
- + 1 /*address_size*/);
- find_entry.signature = bfd_get_64 (objfile->obfd, info_ptr + sig_offset);
- sig_type = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
-
- /* This is only used to lookup previously recorded types.
- If we didn't find it, it's our bug. */
- gdb_assert (sig_type != NULL);
- gdb_assert (offset.sect_off == sig_type->per_cu.offset.sect_off);
+static struct die_info *
+follow_die_sig (struct die_info *src_die, const struct attribute *attr,
+ struct dwarf2_cu **ref_cu)
+{
+ ULONGEST signature = DW_SIGNATURE (attr);
+ struct signatured_type *sig_type;
+ struct die_info *die;
- return sig_type;
+ gdb_assert (attr->form == DW_FORM_ref_sig8);
+
+ sig_type = lookup_signatured_type (*ref_cu, signature);
+ /* sig_type will be NULL if the signatured type is missing from
+ the debug info. */
+ if (sig_type == NULL)
+ {
+ error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
+ " from DIE at 0x%x [in module %s]"),
+ hex_string (signature), src_die->offset.sect_off,
+ objfile_name ((*ref_cu)->objfile));
+ }
+
+ die = follow_die_sig_1 (src_die, sig_type, ref_cu);
+ if (die == NULL)
+ {
+ dump_die_for_error (src_die);
+ error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
+ " from DIE at 0x%x [in module %s]"),
+ hex_string (signature), src_die->offset.sect_off,
+ objfile_name ((*ref_cu)->objfile));
+ }
+
+ return die;
+}
+
+/* Get the type specified by SIGNATURE referenced in DIE/CU,
+ reading in and processing the type unit if necessary. */
+
+static struct type *
+get_signatured_type (struct die_info *die, ULONGEST signature,
+ struct dwarf2_cu *cu)
+{
+ struct signatured_type *sig_type;
+ struct dwarf2_cu *type_cu;
+ struct die_info *type_die;
+ struct type *type;
+
+ sig_type = lookup_signatured_type (cu, signature);
+ /* sig_type will be NULL if the signatured type is missing from
+ the debug info. */
+ if (sig_type == NULL)
+ {
+ complaint (&symfile_complaints,
+ _("Dwarf Error: Cannot find signatured DIE %s referenced"
+ " from DIE at 0x%x [in module %s]"),
+ hex_string (signature), die->offset.sect_off,
+ objfile_name (dwarf2_per_objfile->objfile));
+ return build_error_marker_type (cu, die);
+ }
+
+ /* If we already know the type we're done. */
+ if (sig_type->type != NULL)
+ return sig_type->type;
+
+ type_cu = cu;
+ type_die = follow_die_sig_1 (die, sig_type, &type_cu);
+ if (type_die != NULL)
+ {
+ /* N.B. We need to call get_die_type to ensure only one type for this DIE
+ is created. This is important, for example, because for c++ classes
+ we need TYPE_NAME set which is only done by new_symbol. Blech. */
+ type = read_type_die (type_die, type_cu);
+ if (type == NULL)
+ {
+ complaint (&symfile_complaints,
+ _("Dwarf Error: Cannot build signatured type %s"
+ " referenced from DIE at 0x%x [in module %s]"),
+ hex_string (signature), die->offset.sect_off,
+ objfile_name (dwarf2_per_objfile->objfile));
+ type = build_error_marker_type (cu, die);
+ }
+ }
+ else
+ {
+ complaint (&symfile_complaints,
+ _("Dwarf Error: Problem reading signatured DIE %s referenced"
+ " from DIE at 0x%x [in module %s]"),
+ hex_string (signature), die->offset.sect_off,
+ objfile_name (dwarf2_per_objfile->objfile));
+ type = build_error_marker_type (cu, die);
+ }
+ sig_type->type = type;
+
+ return type;
+}
+
+/* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
+ reading in and processing the type unit if necessary. */
+
+static struct type *
+get_DW_AT_signature_type (struct die_info *die, const struct attribute *attr,
+ struct dwarf2_cu *cu) /* ARI: editCase function */
+{
+ /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
+ if (attr_form_is_ref (attr))
+ {
+ struct dwarf2_cu *type_cu = cu;
+ struct die_info *type_die = follow_die_ref (die, attr, &type_cu);
+
+ return read_type_die (type_die, type_cu);
+ }
+ else if (attr->form == DW_FORM_ref_sig8)
+ {
+ return get_signatured_type (die, DW_SIGNATURE (attr), cu);
+ }
+ else
+ {
+ complaint (&symfile_complaints,
+ _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
+ " at 0x%x [in module %s]"),
+ dwarf_form_name (attr->form), die->offset.sect_off,
+ objfile_name (dwarf2_per_objfile->objfile));
+ return build_error_marker_type (cu, die);
+ }
}
/* Load the DIEs associated with type unit PER_CU into memory. */
static void
read_signatured_type_reader (const struct die_reader_specs *reader,
- gdb_byte *info_ptr,
+ const gdb_byte *info_ptr,
struct die_info *comp_unit_die,
int has_children,
void *data)
init_cutu_and_read_dies (per_cu, NULL, 0, 1,
read_signatured_type_reader, NULL);
+ sig_type->per_cu.tu_read = 1;
}
/* Decode simple location descriptions.
struct objfile *objfile = cu->objfile;
size_t i;
size_t size = blk->size;
- gdb_byte *data = blk->data;
+ const gdb_byte *data = blk->data;
CORE_ADDR stack[64];
int stacki;
unsigned int bytes_read, unsnd;
/* File name relative to the compilation directory of this source file. */
char *file_name = file_file_name (file, lh);
- /* We don't create a macro table for this compilation unit
- at all until we actually get a filename. */
- if (! pending_macros)
- pending_macros = new_macro_table (&objfile->per_bfd->storage_obstack,
- objfile->per_bfd->macro_cache,
- comp_dir);
-
if (! current_file)
{
+ /* Note: We don't create a macro table for this compilation unit
+ at all until we actually get a filename. */
+ struct macro_table *macro_table = get_macro_table (objfile, comp_dir);
+
/* 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, file_name);
- macro_define_special (pending_macros);
+ current_file = macro_set_main (macro_table, file_name);
+ macro_define_special (macro_table);
}
else
current_file = macro_include (current_file, line, file_name);
/* Skip some bytes from BYTES according to the form given in FORM.
Returns the new pointer. */
-static gdb_byte *
-skip_form_bytes (bfd *abfd, gdb_byte *bytes, gdb_byte *buffer_end,
+static const gdb_byte *
+skip_form_bytes (bfd *abfd, const gdb_byte *bytes, const gdb_byte *buffer_end,
enum dwarf_form form,
unsigned int offset_size,
struct dwarf2_section_info *section)
case DW_FORM_udata:
case DW_FORM_GNU_addr_index:
case DW_FORM_GNU_str_index:
- bytes = (gdb_byte *) gdb_skip_leb128 (bytes, buffer_end);
+ bytes = gdb_skip_leb128 (bytes, buffer_end);
if (bytes == NULL)
{
dwarf2_section_buffer_overflow_complaint (section);
complain:
complaint (&symfile_complaints,
_("invalid form 0x%x in `%s'"),
- form,
- section->asection->name);
+ form, get_section_name (section));
return NULL;
}
}
opcode. Returns an updated pointer to the macro data buffer; or,
on error, issues a complaint and returns NULL. */
-static gdb_byte *
+static const gdb_byte *
skip_unknown_opcode (unsigned int opcode,
- gdb_byte **opcode_definitions,
- gdb_byte *mac_ptr, gdb_byte *mac_end,
+ const gdb_byte **opcode_definitions,
+ const gdb_byte *mac_ptr, const gdb_byte *mac_end,
bfd *abfd,
unsigned int offset_size,
struct dwarf2_section_info *section)
{
unsigned int bytes_read, i;
unsigned long arg;
- gdb_byte *defn;
+ const gdb_byte *defn;
if (opcode_definitions[opcode] == NULL)
{
then this updates *OFFSET_SIZE. Returns a pointer to just after
the header, or issues a complaint and returns NULL on error. */
-static gdb_byte *
-dwarf_parse_macro_header (gdb_byte **opcode_definitions,
+static const gdb_byte *
+dwarf_parse_macro_header (const gdb_byte **opcode_definitions,
bfd *abfd,
- gdb_byte *mac_ptr,
+ const gdb_byte *mac_ptr,
unsigned int *offset_size,
int section_is_gnu)
{
including DW_MACRO_GNU_transparent_include. */
static void
-dwarf_decode_macro_bytes (bfd *abfd, gdb_byte *mac_ptr, gdb_byte *mac_end,
+dwarf_decode_macro_bytes (bfd *abfd,
+ const gdb_byte *mac_ptr, const gdb_byte *mac_end,
struct macro_source_file *current_file,
struct line_header *lh, const char *comp_dir,
struct dwarf2_section_info *section,
{
enum dwarf_macro_record_type macinfo_type;
int at_commandline;
- gdb_byte *opcode_definitions[256];
+ const gdb_byte *opcode_definitions[256];
mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr,
&offset_size, section_is_gnu);
{
unsigned int bytes_read;
int line;
- char *body;
+ const char *body;
int is_define;
line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
bfd *include_bfd = abfd;
struct dwarf2_section_info *include_section = section;
struct dwarf2_section_info alt_section;
- gdb_byte *include_mac_end = mac_end;
+ const gdb_byte *include_mac_end = mac_end;
int is_dwz = section_is_dwz;
- gdb_byte *new_mac_ptr;
+ const gdb_byte *new_mac_ptr;
offset = read_offset_1 (abfd, mac_ptr, offset_size);
mac_ptr += offset_size;
dwarf2_read_section (dwarf2_per_objfile->objfile,
&dwz->macro);
- include_bfd = dwz->macro.asection->owner;
include_section = &dwz->macro;
+ include_bfd = get_section_bfd_owner (include_section);
include_mac_end = dwz->macro.buffer + dwz->macro.size;
is_dwz = 1;
}
}
else
{
- *slot = new_mac_ptr;
+ *slot = (void *) new_mac_ptr;
dwarf_decode_macro_bytes (include_bfd, new_mac_ptr,
include_mac_end, current_file,
section, section_is_gnu, is_dwz,
offset_size, objfile, include_hash);
- htab_remove_elt (include_hash, new_mac_ptr);
+ htab_remove_elt (include_hash, (void *) new_mac_ptr);
}
}
break;
struct objfile *objfile = dwarf2_per_objfile->objfile;
struct line_header *lh = cu->line_header;
bfd *abfd;
- gdb_byte *mac_ptr, *mac_end;
+ const gdb_byte *mac_ptr, *mac_end;
struct macro_source_file *current_file = 0;
enum dwarf_macro_record_type macinfo_type;
unsigned int offset_size = cu->header.offset_size;
- gdb_byte *opcode_definitions[256];
+ const gdb_byte *opcode_definitions[256];
struct cleanup *cleanup;
htab_t include_hash;
void **slot;
complaint (&symfile_complaints, _("missing %s section"), section_name);
return;
}
- abfd = section->asection->owner;
+ abfd = get_section_bfd_owner (section);
/* First pass: Find the name of the base filename.
This filename is needed in order to process all macros whose definition
cleanup = make_cleanup_htab_delete (include_hash);
mac_ptr = section->buffer + offset;
slot = htab_find_slot (include_hash, mac_ptr, INSERT);
- *slot = mac_ptr;
+ *slot = (void *) mac_ptr;
dwarf_decode_macro_bytes (abfd, mac_ptr, mac_end,
current_file, lh, comp_dir, section,
section_is_gnu, 0,
if so return true else false. */
static int
-attr_form_is_block (struct attribute *attr)
+attr_form_is_block (const struct attribute *attr)
{
return (attr == NULL ? 0 :
attr->form == DW_FORM_block1
of them. */
static int
-attr_form_is_section_offset (struct attribute *attr)
+attr_form_is_section_offset (const struct attribute *attr)
{
return (attr->form == DW_FORM_data4
|| attr->form == DW_FORM_data8
taken as section offsets, not constants. */
static int
-attr_form_is_constant (struct attribute *attr)
+attr_form_is_constant (const struct attribute *attr)
{
switch (attr->form)
{
}
}
+
+/* DW_ADDR is always stored already as sect_offset; despite for the forms
+ besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
+
+static int
+attr_form_is_ref (const struct attribute *attr)
+{
+ switch (attr->form)
+ {
+ case DW_FORM_ref_addr:
+ case DW_FORM_ref1:
+ case DW_FORM_ref2:
+ case DW_FORM_ref4:
+ case DW_FORM_ref8:
+ case DW_FORM_ref_udata:
+ case DW_FORM_GNU_ref_alt:
+ return 1;
+ default:
+ return 0;
+ }
+}
+
/* Return the .debug_loc section to use for CU.
For DWO files use .debug_loc.dwo. */
static void
fill_in_loclist_baton (struct dwarf2_cu *cu,
struct dwarf2_loclist_baton *baton,
- struct attribute *attr)
+ const struct attribute *attr)
{
struct dwarf2_section_info *section = cu_debug_loc_section (cu);
}
static void
-dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym,
+dwarf2_symbol_mark_computed (const struct attribute *attr, struct symbol *sym,
struct dwarf2_cu *cu, int is_block)
{
struct objfile *objfile = dwarf2_per_objfile->objfile;
per_cu_header_read_in (struct comp_unit_head *cu_headerp,
struct dwarf2_per_cu_data *per_cu)
{
- gdb_byte *info_ptr;
+ const gdb_byte *info_ptr;
if (per_cu->cu)
return &per_cu->cu->header;
return type;
}
-/* Look up the type for the die at OFFSET in the appropriate type_hash
- table, or return NULL if the die does not have a saved type. */
+/* Look up the type for the die at OFFSET in PER_CU in die_type_hash,
+ or return NULL if the die does not have a saved type. */
static struct type *
get_die_type_at_offset (sect_offset offset,
return NULL;
}
-/* Look up the type for DIE in the appropriate type_hash table,
+/* Look up the type for DIE in CU in die_type_hash,
or return NULL if DIE does not have a saved type. */
static struct type *
struct dwarf2_per_objfile *data = d;
int ix;
- for (ix = 0; ix < dwarf2_per_objfile->n_comp_units; ++ix)
- VEC_free (dwarf2_per_cu_ptr,
- dwarf2_per_objfile->all_comp_units[ix]->imported_symtabs);
+ /* Make sure we don't accidentally use dwarf2_per_objfile while
+ cleaning up. */
+ dwarf2_per_objfile = NULL;
+
+ for (ix = 0; ix < data->n_comp_units; ++ix)
+ VEC_free (dwarf2_per_cu_ptr, data->all_comp_units[ix]->imported_symtabs);
- for (ix = 0; ix < dwarf2_per_objfile->n_type_units; ++ix)
+ for (ix = 0; ix < data->n_type_units; ++ix)
VEC_free (dwarf2_per_cu_ptr,
- dwarf2_per_objfile->all_type_units[ix]->per_cu.imported_symtabs);
+ data->all_type_units[ix]->per_cu.imported_symtabs);
+ xfree (data->all_type_units);
VEC_free (dwarf2_section_info_def, data->types);
if (data->dwo_files)
free_dwo_files (data->dwo_files, objfile);
+ if (data->dwp_file)
+ gdb_bfd_unref (data->dwp_file->dbfd);
if (data->dwz_file && data->dwz_file->dwz_bfd)
gdb_bfd_unref (data->dwz_file->dwz_bfd);
CORE_ADDR start, CORE_ADDR end, unsigned int cu_index)
{
offset_type cu_index_to_write;
- char addr[8];
+ gdb_byte addr[8];
CORE_ADDR baseaddr;
baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
{
struct signatured_type_index_data *info = d;
struct signatured_type *entry = (struct signatured_type *) *slot;
- struct dwarf2_per_cu_data *per_cu = &entry->per_cu;
- struct partial_symtab *psymtab = per_cu->v.psymtab;
+ struct partial_symtab *psymtab = entry->per_cu.v.psymtab;
gdb_byte val[8];
write_psymbols (info->symtab,
htab_t cu_index_htab;
struct psymtab_cu_index_map *psymtab_cu_index_map;
- if (!objfile->psymtabs || !objfile->psymtabs_addrmap)
- return;
-
if (dwarf2_per_objfile->using_index)
error (_("Cannot use an index to create the index"));
if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) > 1)
error (_("Cannot make an index when the file has multiple .debug_types sections"));
- if (stat (objfile->name, &st) < 0)
- perror_with_name (objfile->name);
+ if (!objfile->psymtabs || !objfile->psymtabs_addrmap)
+ return;
+
+ if (stat (objfile_name (objfile), &st) < 0)
+ perror_with_name (objfile_name (objfile));
- filename = concat (dir, SLASH_STRING, lbasename (objfile->name),
+ filename = concat (dir, SLASH_STRING, lbasename (objfile_name (objfile)),
INDEX_SUFFIX, (char *) NULL);
cleanup = make_cleanup (xfree, filename);
- out_file = fopen (filename, "wb");
+ out_file = gdb_fopen_cloexec (filename, "wb");
if (!out_file)
error (_("Can't open `%s' for writing"), filename);
struct psymtab_cu_index_map *map;
void **slot;
+ /* CU of a shared file from 'dwz -m' may be unused by this main file.
+ It may be referenced from a local scope but in such case it does not
+ need to be present in .gdb_index. */
+ if (psymtab == NULL)
+ continue;
+
if (psymtab->user == NULL)
recursively_write_psymbols (objfile, psymtab, symtab, psyms_seen, i);
struct stat st;
/* If the objfile does not correspond to an actual file, skip it. */
- if (stat (objfile->name, &st) < 0)
+ if (stat (objfile_name (objfile), &st) < 0)
continue;
dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
if (except.reason < 0)
exception_fprintf (gdb_stderr, except,
_("Error while writing index for `%s': "),
- objfile->name);
+ objfile_name (objfile));
}
}
}
&set_dwarf2_cmdlist,
&show_dwarf2_cmdlist);
- add_setshow_boolean_cmd ("dwarf2-read", no_class, &dwarf2_read_debug, _("\
+ add_setshow_zuinteger_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."),
+When enabled (non-zero), debugging messages are printed during dwarf2\n\
+reading and symtab expansion. A value of 1 (one) provides basic\n\
+information. A value greater than 1 provides more verbose information."),
NULL,
NULL,
&setdebuglist, &showdebuglist);
projects / deliverable / binutils-gdb.git / blobdiff