/* Symbol table definitions for GDB.
- Copyright 1986, 89, 91, 92, 93, 94, 95, 96, 1998
- Free Software Foundation, Inc.
+
+ Copyright 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
+ 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Free Software
+ Foundation, Inc.
This file is part of GDB.
#if !defined (SYMTAB_H)
#define SYMTAB_H 1
-/* Some definitions and declarations to go with use of obstacks. */
-
-#include "obstack.h"
-#define obstack_chunk_alloc xmalloc
-#define obstack_chunk_free free
-#include "bcache.h"
-
-/* Don't do this; it means that if some .o's are compiled with GNU C
- and some are not (easy to do accidentally the way we configure
- things; also it is a pain to have to "make clean" every time you
- want to switch compilers), then GDB dies a horrible death. */
-/* GNU C supports enums that are bitfields. Some compilers don't. */
-#if 0 && defined(__GNUC__) && !defined(BYTE_BITFIELD)
-#define BYTE_BITFIELD :8;
-#else
-#define BYTE_BITFIELD /*nothing */
-#endif
+/* Opaque declarations. */
+struct ui_file;
+struct frame_info;
+struct symbol;
+struct obstack;
+struct objfile;
+struct block;
+struct blockvector;
+struct axs_value;
+struct agent_expr;
+
+/* Some of the structures in this file are space critical.
+ The space-critical structures are:
+
+ struct general_symbol_info
+ struct symbol
+ struct partial_symbol
+
+ These structures are layed out to encourage good packing.
+ They use ENUM_BITFIELD and short int fields, and they order the
+ structure members so that fields less than a word are next
+ to each other so they can be packed together. */
+
+/* Rearranged: used ENUM_BITFIELD and rearranged field order in
+ all the space critical structures (plus struct minimal_symbol).
+ Memory usage dropped from 99360768 bytes to 90001408 bytes.
+ I measured this with before-and-after tests of
+ "HEAD-old-gdb -readnow HEAD-old-gdb" and
+ "HEAD-new-gdb -readnow HEAD-old-gdb" on native i686-pc-linux-gnu,
+ red hat linux 8, with LD_LIBRARY_PATH=/usr/lib/debug,
+ typing "maint space 1" at the first command prompt.
+
+ Here is another measurement (from andrew c):
+ # no /usr/lib/debug, just plain glibc, like a normal user
+ gdb HEAD-old-gdb
+ (gdb) break internal_error
+ (gdb) run
+ (gdb) maint internal-error
+ (gdb) backtrace
+ (gdb) maint space 1
+
+ gdb gdb_6_0_branch 2003-08-19 space used: 8896512
+ gdb HEAD 2003-08-19 space used: 8904704
+ gdb HEAD 2003-08-21 space used: 8396800 (+symtab.h)
+ gdb HEAD 2003-08-21 space used: 8265728 (+gdbtypes.h)
+
+ The third line shows the savings from the optimizations in symtab.h.
+ The fourth line shows the savings from the optimizations in
+ gdbtypes.h. Both optimizations are in gdb HEAD now.
+
+ --chastain 2003-08-21 */
+
+
/* Define a structure for the information that is common to all symbol types,
including minimal symbols, partial symbols, and full symbols. In a
multilanguage environment, some language specific information may need to
- be recorded along with each symbol.
+ be recorded along with each symbol. */
- These fields are ordered to encourage good packing, since we frequently
- have tens or hundreds of thousands of these. */
+/* This structure is space critical. See space comments at the top. */
struct general_symbol_info
+{
+ /* Name of the symbol. This is a required field. Storage for the
+ name is allocated on the psymbol_obstack or symbol_obstack for
+ the associated objfile. For languages like C++ that make a
+ distinction between the mangled name and demangled name, this is
+ the mangled name. */
+
+ char *name;
+
+ /* Value of the symbol. Which member of this union to use, and what
+ it means, depends on what kind of symbol this is and its
+ SYMBOL_CLASS. See comments there for more details. All of these
+ are in host byte order (though what they point to might be in
+ target byte order, e.g. LOC_CONST_BYTES). */
+
+ union
{
- /* Name of the symbol. This is a required field. Storage for the name is
- allocated on the psymbol_obstack or symbol_obstack for the associated
- objfile. */
+ /* The fact that this is a long not a LONGEST mainly limits the
+ range of a LOC_CONST. Since LOC_CONST_BYTES exists, I'm not
+ sure that is a big deal. */
+ long ivalue;
- char *name;
+ struct block *block;
- /* Value of the symbol. Which member of this union to use, and what
- it means, depends on what kind of symbol this is and its
- SYMBOL_CLASS. See comments there for more details. All of these
- are in host byte order (though what they point to might be in
- target byte order, e.g. LOC_CONST_BYTES). */
+ char *bytes;
- union
- {
- /* The fact that this is a long not a LONGEST mainly limits the
- range of a LOC_CONST. Since LOC_CONST_BYTES exists, I'm not
- sure that is a big deal. */
- long ivalue;
+ CORE_ADDR address;
- struct block *block;
+ /* for opaque typedef struct chain */
- char *bytes;
-
- CORE_ADDR address;
-
- /* for opaque typedef struct chain */
-
- struct symbol *chain;
- }
- value;
+ struct symbol *chain;
+ }
+ value;
- /* Since one and only one language can apply, wrap the language specific
- information inside a union. */
+ /* Since one and only one language can apply, wrap the language specific
+ information inside a union. */
- union
- {
- struct cplus_specific /* For C++ */
- /* and Java */
- {
- char *demangled_name;
- }
- cplus_specific;
- struct chill_specific /* For Chill */
- {
- char *demangled_name;
- }
- chill_specific;
- }
- language_specific;
+ union
+ {
+ struct cplus_specific
+ {
+ /* This is in fact used for C++, Java, and Objective C. */
+ char *demangled_name;
+ }
+ cplus_specific;
+ }
+ language_specific;
- /* Record the source code language that applies to this symbol.
- This is used to select one of the fields from the language specific
- union above. */
+ /* Record the source code language that applies to this symbol.
+ This is used to select one of the fields from the language specific
+ union above. */
- enum language language BYTE_BITFIELD;
+ ENUM_BITFIELD(language) language : 8;
- /* Which section is this symbol in? This is an index into
- section_offsets for this objfile. Negative means that the symbol
- does not get relocated relative to a section.
- Disclaimer: currently this is just used for xcoff, so don't
- expect all symbol-reading code to set it correctly (the ELF code
- also tries to set it correctly). */
+ /* Which section is this symbol in? This is an index into
+ section_offsets for this objfile. Negative means that the symbol
+ does not get relocated relative to a section.
+ Disclaimer: currently this is just used for xcoff, so don't
+ expect all symbol-reading code to set it correctly (the ELF code
+ also tries to set it correctly). */
- short section;
+ short section;
- /* The bfd section associated with this symbol. */
+ /* The bfd section associated with this symbol. */
- asection *bfd_section;
- };
+ asection *bfd_section;
+};
extern CORE_ADDR symbol_overlayed_address (CORE_ADDR, asection *);
-#define SYMBOL_NAME(symbol) (symbol)->ginfo.name
+/* Note that all the following SYMBOL_* macros are used with the
+ SYMBOL argument being either a partial symbol, a minimal symbol or
+ a full symbol. All three types have a ginfo field. In particular
+ the SYMBOL_INIT_LANGUAGE_SPECIFIC, SYMBOL_INIT_DEMANGLED_NAME,
+ SYMBOL_DEMANGLED_NAME macros cannot be entirely substituted by
+ functions, unless the callers are changed to pass in the ginfo
+ field only, instead of the SYMBOL parameter. */
+
+#define DEPRECATED_SYMBOL_NAME(symbol) (symbol)->ginfo.name
#define SYMBOL_VALUE(symbol) (symbol)->ginfo.value.ivalue
#define SYMBOL_VALUE_ADDRESS(symbol) (symbol)->ginfo.value.address
#define SYMBOL_VALUE_BYTES(symbol) (symbol)->ginfo.value.bytes
#define SYMBOL_CPLUS_DEMANGLED_NAME(symbol) \
(symbol)->ginfo.language_specific.cplus_specific.demangled_name
-/* Macro that initializes the language dependent portion of a symbol
+/* Initializes the language dependent portion of a symbol
depending upon the language for the symbol. */
-
-#define SYMBOL_INIT_LANGUAGE_SPECIFIC(symbol,language) \
- do { \
- SYMBOL_LANGUAGE (symbol) = language; \
- if (SYMBOL_LANGUAGE (symbol) == language_cplus \
- || SYMBOL_LANGUAGE (symbol) == language_java \
- ) \
- { \
- SYMBOL_CPLUS_DEMANGLED_NAME (symbol) = NULL; \
- } \
- else if (SYMBOL_LANGUAGE (symbol) == language_chill) \
- { \
- SYMBOL_CHILL_DEMANGLED_NAME (symbol) = NULL; \
- } \
- else \
- { \
- memset (&(symbol)->ginfo.language_specific, 0, \
- sizeof ((symbol)->ginfo.language_specific)); \
- } \
- } while (0)
-
-/* Macro that attempts to initialize the demangled name for a symbol,
- based on the language of that symbol. If the language is set to
- language_auto, it will attempt to find any demangling algorithm
- that works and then set the language appropriately. If no demangling
- of any kind is found, the language is set back to language_unknown,
- so we can avoid doing this work again the next time we encounter
- the symbol. Any required space to store the name is obtained from the
- specified obstack. */
-
-#define SYMBOL_INIT_DEMANGLED_NAME(symbol,obstack) \
- do { \
- char *demangled = NULL; \
- if (SYMBOL_LANGUAGE (symbol) == language_cplus \
- || SYMBOL_LANGUAGE (symbol) == language_auto) \
- { \
- demangled = \
- cplus_demangle (SYMBOL_NAME (symbol), DMGL_PARAMS | DMGL_ANSI);\
- if (demangled != NULL) \
- { \
- SYMBOL_LANGUAGE (symbol) = language_cplus; \
- SYMBOL_CPLUS_DEMANGLED_NAME (symbol) = \
- obsavestring (demangled, strlen (demangled), (obstack)); \
- free (demangled); \
- } \
- else \
- { \
- SYMBOL_CPLUS_DEMANGLED_NAME (symbol) = NULL; \
- } \
- } \
- if (SYMBOL_LANGUAGE (symbol) == language_java) \
- { \
- demangled = \
- cplus_demangle (SYMBOL_NAME (symbol), \
- DMGL_PARAMS | DMGL_ANSI | DMGL_JAVA); \
- if (demangled != NULL) \
- { \
- SYMBOL_LANGUAGE (symbol) = language_java; \
- SYMBOL_CPLUS_DEMANGLED_NAME (symbol) = \
- obsavestring (demangled, strlen (demangled), (obstack)); \
- free (demangled); \
- } \
- else \
- { \
- SYMBOL_CPLUS_DEMANGLED_NAME (symbol) = NULL; \
- } \
- } \
- if (demangled == NULL \
- && (SYMBOL_LANGUAGE (symbol) == language_chill \
- || SYMBOL_LANGUAGE (symbol) == language_auto)) \
- { \
- demangled = \
- chill_demangle (SYMBOL_NAME (symbol)); \
- if (demangled != NULL) \
- { \
- SYMBOL_LANGUAGE (symbol) = language_chill; \
- SYMBOL_CHILL_DEMANGLED_NAME (symbol) = \
- obsavestring (demangled, strlen (demangled), (obstack)); \
- free (demangled); \
- } \
- else \
- { \
- SYMBOL_CHILL_DEMANGLED_NAME (symbol) = NULL; \
- } \
- } \
- if (SYMBOL_LANGUAGE (symbol) == language_auto) \
- { \
- SYMBOL_LANGUAGE (symbol) = language_unknown; \
- } \
- } while (0)
-
-/* Macro that returns the demangled name for a symbol based on the language
- for that symbol. If no demangled name exists, returns NULL. */
-
-#define SYMBOL_DEMANGLED_NAME(symbol) \
- (SYMBOL_LANGUAGE (symbol) == language_cplus \
- || SYMBOL_LANGUAGE (symbol) == language_java \
- ? SYMBOL_CPLUS_DEMANGLED_NAME (symbol) \
- : (SYMBOL_LANGUAGE (symbol) == language_chill \
- ? SYMBOL_CHILL_DEMANGLED_NAME (symbol) \
- : NULL))
-
-#define SYMBOL_CHILL_DEMANGLED_NAME(symbol) \
- (symbol)->ginfo.language_specific.chill_specific.demangled_name
-
-/* Macro that returns the "natural source name" of a symbol. In C++ this is
- the "demangled" form of the name if demangle is on and the "mangled" form
- of the name if demangle is off. In other languages this is just the
- symbol name. The result should never be NULL. */
-
-#define SYMBOL_SOURCE_NAME(symbol) \
- (demangle && SYMBOL_DEMANGLED_NAME (symbol) != NULL \
- ? SYMBOL_DEMANGLED_NAME (symbol) \
- : SYMBOL_NAME (symbol))
-
-/* Macro that returns the "natural assembly name" of a symbol. In C++ this is
- the "mangled" form of the name if demangle is off, or if demangle is on and
- asm_demangle is off. Otherwise if asm_demangle is on it is the "demangled"
- form. In other languages this is just the symbol name. The result should
- never be NULL. */
-
-#define SYMBOL_LINKAGE_NAME(symbol) \
- (demangle && asm_demangle && SYMBOL_DEMANGLED_NAME (symbol) != NULL \
- ? SYMBOL_DEMANGLED_NAME (symbol) \
- : SYMBOL_NAME (symbol))
+#define SYMBOL_INIT_LANGUAGE_SPECIFIC(symbol,language) \
+ (symbol_init_language_specific (&(symbol)->ginfo, (language)))
+extern void symbol_init_language_specific (struct general_symbol_info *symbol,
+ enum language language);
+
+#define SYMBOL_INIT_DEMANGLED_NAME(symbol,obstack) \
+ (symbol_init_demangled_name (&(symbol)->ginfo, (obstack)))
+extern void symbol_init_demangled_name (struct general_symbol_info *symbol,
+ struct obstack *obstack);
+
+#define SYMBOL_SET_NAMES(symbol,linkage_name,len,objfile) \
+ symbol_set_names (&(symbol)->ginfo, linkage_name, len, objfile)
+extern void symbol_set_names (struct general_symbol_info *symbol,
+ const char *linkage_name, int len,
+ struct objfile *objfile);
+
+/* Now come lots of name accessor macros. Short version as to when to
+ use which: Use SYMBOL_NATURAL_NAME to refer to the name of the
+ symbol in the original source code. Use SYMBOL_LINKAGE_NAME if you
+ want to know what the linker thinks the symbol's name is. Use
+ SYMBOL_PRINT_NAME for output. Use SYMBOL_DEMANGLED_NAME if you
+ specifically need to know whether SYMBOL_NATURAL_NAME and
+ SYMBOL_LINKAGE_NAME are different. Don't use
+ DEPRECATED_SYMBOL_NAME at all: instances of that macro should be
+ replaced by SYMBOL_NATURAL_NAME, SYMBOL_LINKAGE_NAME, or perhaps
+ SYMBOL_PRINT_NAME. */
+
+/* Return SYMBOL's "natural" name, i.e. the name that it was called in
+ the original source code. In languages like C++ where symbols may
+ be mangled for ease of manipulation by the linker, this is the
+ demangled name. */
+
+#define SYMBOL_NATURAL_NAME(symbol) \
+ (symbol_natural_name (&(symbol)->ginfo))
+extern char *symbol_natural_name (const struct general_symbol_info *symbol);
+
+/* Return SYMBOL's name from the point of view of the linker. In
+ languages like C++ where symbols may be mangled for ease of
+ manipulation by the linker, this is the mangled name; otherwise,
+ it's the same as SYMBOL_NATURAL_NAME. This is currently identical
+ to DEPRECATED_SYMBOL_NAME, but please use SYMBOL_LINKAGE_NAME when
+ appropriate: it conveys the additional semantic information that
+ you really have thought about the issue and decided that you mean
+ SYMBOL_LINKAGE_NAME instead of SYMBOL_NATURAL_NAME. */
+
+#define SYMBOL_LINKAGE_NAME(symbol) (symbol)->ginfo.name
+
+/* Return the demangled name for a symbol based on the language for
+ that symbol. If no demangled name exists, return NULL. */
+#define SYMBOL_DEMANGLED_NAME(symbol) \
+ (symbol_demangled_name (&(symbol)->ginfo))
+extern char *symbol_demangled_name (struct general_symbol_info *symbol);
+
+/* Macro that returns a version of the name of a symbol that is
+ suitable for output. In C++ this is the "demangled" form of the
+ name if demangle is on and the "mangled" form of the name if
+ demangle is off. In other languages this is just the symbol name.
+ The result should never be NULL. Don't use this for internal
+ purposes (e.g. storing in a hashtable): it's only suitable for
+ output. */
+
+#define SYMBOL_PRINT_NAME(symbol) \
+ (demangle ? SYMBOL_NATURAL_NAME (symbol) : SYMBOL_LINKAGE_NAME (symbol))
/* Macro that tests a symbol for a match against a specified name string.
First test the unencoded name, then looks for and test a C++ encoded
"foo :: bar (int, long)".
Evaluates to zero if the match fails, or nonzero if it succeeds. */
-#define SYMBOL_MATCHES_NAME(symbol, name) \
- (STREQ (SYMBOL_NAME (symbol), (name)) \
- || (SYMBOL_DEMANGLED_NAME (symbol) != NULL \
- && strcmp_iw (SYMBOL_DEMANGLED_NAME (symbol), (name)) == 0))
-
-/* Macro that tests a symbol for an re-match against the last compiled regular
- expression. First test the unencoded name, then look for and test a C++
- encoded name if it exists.
- Evaluates to zero if the match fails, or nonzero if it succeeds. */
-
-#define SYMBOL_MATCHES_REGEXP(symbol) \
- (re_exec (SYMBOL_NAME (symbol)) != 0 \
- || (SYMBOL_DEMANGLED_NAME (symbol) != NULL \
- && re_exec (SYMBOL_DEMANGLED_NAME (symbol)) != 0))
+/* Macro that tests a symbol for a match against a specified name
+ string. It tests against SYMBOL_NATURAL_NAME, and it ignores
+ whitespace and trailing parentheses. (See strcmp_iw for details
+ about its behavior.) */
+
+#define SYMBOL_MATCHES_NATURAL_NAME(symbol, name) \
+ (strcmp_iw (SYMBOL_NATURAL_NAME (symbol), (name)) == 0)
+
+/* Classification types for a minimal symbol. These should be taken as
+ "advisory only", since if gdb can't easily figure out a
+ classification it simply selects mst_unknown. It may also have to
+ guess when it can't figure out which is a better match between two
+ types (mst_data versus mst_bss) for example. Since the minimal
+ symbol info is sometimes derived from the BFD library's view of a
+ file, we need to live with what information bfd supplies. */
+
+enum minimal_symbol_type
+{
+ mst_unknown = 0, /* Unknown type, the default */
+ mst_text, /* Generally executable instructions */
+ mst_data, /* Generally initialized data */
+ mst_bss, /* Generally uninitialized data */
+ mst_abs, /* Generally absolute (nonrelocatable) */
+ /* GDB uses mst_solib_trampoline for the start address of a shared
+ library trampoline entry. Breakpoints for shared library functions
+ are put there if the shared library is not yet loaded.
+ After the shared library is loaded, lookup_minimal_symbol will
+ prefer the minimal symbol from the shared library (usually
+ a mst_text symbol) over the mst_solib_trampoline symbol, and the
+ breakpoints will be moved to their true address in the shared
+ library via breakpoint_re_set. */
+ mst_solib_trampoline, /* Shared library trampoline code */
+ /* For the mst_file* types, the names are only guaranteed to be unique
+ within a given .o file. */
+ mst_file_text, /* Static version of mst_text */
+ mst_file_data, /* Static version of mst_data */
+ mst_file_bss /* Static version of mst_bss */
+};
/* Define a simple structure used to hold some very basic information about
all defined global symbols (text, data, bss, abs, etc). The only required
used to figure out what full symbol table entries need to be read in. */
struct minimal_symbol
- {
+{
- /* The general symbol info required for all types of symbols.
+ /* The general symbol info required for all types of symbols.
- The SYMBOL_VALUE_ADDRESS contains the address that this symbol
- corresponds to. */
+ The SYMBOL_VALUE_ADDRESS contains the address that this symbol
+ corresponds to. */
- struct general_symbol_info ginfo;
+ struct general_symbol_info ginfo;
- /* The info field is available for caching machine-specific information
- so it doesn't have to rederive the info constantly (over a serial line).
- It is initialized to zero and stays that way until target-dependent code
- sets it. Storage for any data pointed to by this field should be allo-
- cated on the symbol_obstack for the associated objfile.
- The type would be "void *" except for reasons of compatibility with older
- compilers. This field is optional.
+ /* The info field is available for caching machine-specific information
+ so it doesn't have to rederive the info constantly (over a serial line).
+ It is initialized to zero and stays that way until target-dependent code
+ sets it. Storage for any data pointed to by this field should be allo-
+ cated on the symbol_obstack for the associated objfile.
+ The type would be "void *" except for reasons of compatibility with older
+ compilers. This field is optional.
- Currently, the AMD 29000 tdep.c uses it to remember things it has decoded
- from the instructions in the function header, and the MIPS-16 code uses
- it to identify 16-bit procedures. */
+ Currently, the AMD 29000 tdep.c uses it to remember things it has decoded
+ from the instructions in the function header, and the MIPS-16 code uses
+ it to identify 16-bit procedures. */
- char *info;
+ char *info;
#ifdef SOFUN_ADDRESS_MAYBE_MISSING
- /* Which source file is this symbol in? Only relevant for mst_file_*. */
- char *filename;
+ /* Which source file is this symbol in? Only relevant for mst_file_*. */
+ char *filename;
#endif
- /* Classification types for this symbol. These should be taken as "advisory
- only", since if gdb can't easily figure out a classification it simply
- selects mst_unknown. It may also have to guess when it can't figure out
- which is a better match between two types (mst_data versus mst_bss) for
- example. Since the minimal symbol info is sometimes derived from the
- BFD library's view of a file, we need to live with what information bfd
- supplies. */
-
- enum minimal_symbol_type
- {
- mst_unknown = 0, /* Unknown type, the default */
- mst_text, /* Generally executable instructions */
- mst_data, /* Generally initialized data */
- mst_bss, /* Generally uninitialized data */
- mst_abs, /* Generally absolute (nonrelocatable) */
- /* GDB uses mst_solib_trampoline for the start address of a shared
- library trampoline entry. Breakpoints for shared library functions
- are put there if the shared library is not yet loaded.
- After the shared library is loaded, lookup_minimal_symbol will
- prefer the minimal symbol from the shared library (usually
- a mst_text symbol) over the mst_solib_trampoline symbol, and the
- breakpoints will be moved to their true address in the shared
- library via breakpoint_re_set. */
- mst_solib_trampoline, /* Shared library trampoline code */
- /* For the mst_file* types, the names are only guaranteed to be unique
- within a given .o file. */
- mst_file_text, /* Static version of mst_text */
- mst_file_data, /* Static version of mst_data */
- mst_file_bss /* Static version of mst_bss */
- }
- type BYTE_BITFIELD;
-
- /* Minimal symbols with the same hash key are kept on a linked
- list. This is the link. */
-
- struct minimal_symbol *hash_next;
-
- /* Minimal symbols are stored in two different hash tables. This is
- the `next' pointer for the demangled hash table. */
-
- struct minimal_symbol *demangled_hash_next;
- };
+ /* Classification type for this minimal symbol. */
-#define MSYMBOL_INFO(msymbol) (msymbol)->info
-#define MSYMBOL_TYPE(msymbol) (msymbol)->type
-
-\f
-
-/* All of the name-scope contours of the program
- are represented by `struct block' objects.
- All of these objects are pointed to by the blockvector.
-
- Each block represents one name scope.
- Each lexical context has its own block.
-
- The blockvector begins with some special blocks.
- The GLOBAL_BLOCK contains all the symbols defined in this compilation
- whose scope is the entire program linked together.
- The STATIC_BLOCK contains all the symbols whose scope is the
- entire compilation excluding other separate compilations.
- Blocks starting with the FIRST_LOCAL_BLOCK are not special.
-
- Each block records a range of core addresses for the code that
- is in the scope of the block. The STATIC_BLOCK and GLOBAL_BLOCK
- give, for the range of code, the entire range of code produced
- by the compilation that the symbol segment belongs to.
+ ENUM_BITFIELD(minimal_symbol_type) type : 8;
- The blocks appear in the blockvector
- in order of increasing starting-address,
- and, within that, in order of decreasing ending-address.
+ /* Minimal symbols with the same hash key are kept on a linked
+ list. This is the link. */
- This implies that within the body of one function
- the blocks appear in the order of a depth-first tree walk. */
-
-struct blockvector
- {
- /* Number of blocks in the list. */
- int nblocks;
- /* The blocks themselves. */
- struct block *block[1];
- };
-
-#define BLOCKVECTOR_NBLOCKS(blocklist) (blocklist)->nblocks
-#define BLOCKVECTOR_BLOCK(blocklist,n) (blocklist)->block[n]
-
-/* Special block numbers */
-
-#define GLOBAL_BLOCK 0
-#define STATIC_BLOCK 1
-#define FIRST_LOCAL_BLOCK 2
-
-struct block
- {
+ struct minimal_symbol *hash_next;
- /* Addresses in the executable code that are in this block. */
+ /* Minimal symbols are stored in two different hash tables. This is
+ the `next' pointer for the demangled hash table. */
- CORE_ADDR startaddr;
- CORE_ADDR endaddr;
+ struct minimal_symbol *demangled_hash_next;
+};
- /* The symbol that names this block, if the block is the body of a
- function; otherwise, zero. */
-
- struct symbol *function;
-
- /* The `struct block' for the containing block, or 0 if none.
-
- The superblock of a top-level local block (i.e. a function in the
- case of C) is the STATIC_BLOCK. The superblock of the
- STATIC_BLOCK is the GLOBAL_BLOCK. */
-
- struct block *superblock;
-
- /* Version of GCC used to compile the function corresponding
- to this block, or 0 if not compiled with GCC. When possible,
- GCC should be compatible with the native compiler, or if that
- is not feasible, the differences should be fixed during symbol
- reading. As of 16 Apr 93, this flag is never used to distinguish
- between gcc2 and the native compiler.
+#define MSYMBOL_INFO(msymbol) (msymbol)->info
+#define MSYMBOL_TYPE(msymbol) (msymbol)->type
- If there is no function corresponding to this block, this meaning
- of this flag is undefined. */
+\f
- unsigned char gcc_compile_flag;
+/* Represent one symbol name; a variable, constant, function or typedef. */
- /* Number of local symbols. */
+/* Different name domains for symbols. Looking up a symbol specifies a
+ domain and ignores symbol definitions in other name domains. */
- int nsyms;
+typedef enum domain_enum_tag
+{
+ /* UNDEF_DOMAIN is used when a domain has not been discovered or
+ none of the following apply. This usually indicates an error either
+ in the symbol information or in gdb's handling of symbols. */
- /* The symbols. If some of them are arguments, then they must be
- in the order in which we would like to print them. */
+ UNDEF_DOMAIN,
- struct symbol *sym[1];
- };
+ /* VAR_DOMAIN is the usual domain. In C, this contains variables,
+ function names, typedef names and enum type values. */
-#define BLOCK_START(bl) (bl)->startaddr
-#define BLOCK_END(bl) (bl)->endaddr
-#define BLOCK_NSYMS(bl) (bl)->nsyms
-#define BLOCK_SYM(bl, n) (bl)->sym[n]
-#define BLOCK_FUNCTION(bl) (bl)->function
-#define BLOCK_SUPERBLOCK(bl) (bl)->superblock
-#define BLOCK_GCC_COMPILED(bl) (bl)->gcc_compile_flag
+ VAR_DOMAIN,
-/* Nonzero if symbols of block BL should be sorted alphabetically.
- Don't sort a block which corresponds to a function. If we did the
- sorting would have to preserve the order of the symbols for the
- arguments. */
+ /* STRUCT_DOMAIN is used in C to hold struct, union and enum type names.
+ Thus, if `struct foo' is used in a C program, it produces a symbol named
+ `foo' in the STRUCT_DOMAIN. */
-#define BLOCK_SHOULD_SORT(bl) ((bl)->nsyms >= 40 && BLOCK_FUNCTION (bl) == NULL)
-\f
+ STRUCT_DOMAIN,
-/* Represent one symbol name; a variable, constant, function or typedef. */
+ /* LABEL_DOMAIN may be used for names of labels (for gotos);
+ currently it is not used and labels are not recorded at all. */
-/* Different name spaces for symbols. Looking up a symbol specifies a
- namespace and ignores symbol definitions in other name spaces. */
+ LABEL_DOMAIN,
-typedef enum
- {
- /* UNDEF_NAMESPACE is used when a namespace has not been discovered or
- none of the following apply. This usually indicates an error either
- in the symbol information or in gdb's handling of symbols. */
+ /* Searching domains. These overlap with VAR_DOMAIN, providing
+ some granularity with the search_symbols function. */
- UNDEF_NAMESPACE,
+ /* Everything in VAR_DOMAIN minus FUNCTIONS_-, TYPES_-, and
+ METHODS_DOMAIN */
+ VARIABLES_DOMAIN,
- /* VAR_NAMESPACE is the usual namespace. In C, this contains variables,
- function names, typedef names and enum type values. */
+ /* All functions -- for some reason not methods, though. */
+ FUNCTIONS_DOMAIN,
- VAR_NAMESPACE,
+ /* All defined types */
+ TYPES_DOMAIN,
- /* STRUCT_NAMESPACE is used in C to hold struct, union and enum type names.
- Thus, if `struct foo' is used in a C program, it produces a symbol named
- `foo' in the STRUCT_NAMESPACE. */
+ /* All class methods -- why is this separated out? */
+ METHODS_DOMAIN
+}
+domain_enum;
- STRUCT_NAMESPACE,
+/* An address-class says where to find the value of a symbol. */
- /* LABEL_NAMESPACE may be used for names of labels (for gotos);
- currently it is not used and labels are not recorded at all. */
+enum address_class
+{
+ /* Not used; catches errors */
- LABEL_NAMESPACE,
+ LOC_UNDEF,
- /* Searching namespaces. These overlap with VAR_NAMESPACE, providing
- some granularity with the search_symbols function. */
+ /* Value is constant int SYMBOL_VALUE, host byteorder */
- /* Everything in VAR_NAMESPACE minus FUNCTIONS_-, TYPES_-, and
- METHODS_NAMESPACE */
- VARIABLES_NAMESPACE,
+ LOC_CONST,
- /* All functions -- for some reason not methods, though. */
- FUNCTIONS_NAMESPACE,
+ /* Value is at fixed address SYMBOL_VALUE_ADDRESS */
- /* All defined types */
- TYPES_NAMESPACE,
+ LOC_STATIC,
- /* All class methods -- why is this separated out? */
- METHODS_NAMESPACE
+ /* Value is in register. SYMBOL_VALUE is the register number. */
- }
-namespace_enum;
+ LOC_REGISTER,
-/* An address-class says where to find the value of a symbol. */
+ /* It's an argument; the value is at SYMBOL_VALUE offset in arglist. */
-enum address_class
- {
- /* Not used; catches errors */
+ LOC_ARG,
- LOC_UNDEF,
+ /* Value address is at SYMBOL_VALUE offset in arglist. */
- /* Value is constant int SYMBOL_VALUE, host byteorder */
+ LOC_REF_ARG,
- LOC_CONST,
+ /* Value is in register number SYMBOL_VALUE. Just like LOC_REGISTER
+ except this is an argument. Probably the cleaner way to handle
+ this would be to separate address_class (which would include
+ separate ARG and LOCAL to deal with the frame's arguments
+ (get_frame_args_address) versus the frame's locals
+ (get_frame_locals_address), and an is_argument flag.
- /* Value is at fixed address SYMBOL_VALUE_ADDRESS */
+ For some symbol formats (stabs, for some compilers at least),
+ the compiler generates two symbols, an argument and a register.
+ In some cases we combine them to a single LOC_REGPARM in symbol
+ reading, but currently not for all cases (e.g. it's passed on the
+ stack and then loaded into a register). */
- LOC_STATIC,
+ LOC_REGPARM,
- /* Value is in register. SYMBOL_VALUE is the register number. */
+ /* Value is in specified register. Just like LOC_REGPARM except the
+ register holds the address of the argument instead of the argument
+ itself. This is currently used for the passing of structs and unions
+ on sparc and hppa. It is also used for call by reference where the
+ address is in a register, at least by mipsread.c. */
- LOC_REGISTER,
+ LOC_REGPARM_ADDR,
- /* It's an argument; the value is at SYMBOL_VALUE offset in arglist. */
+ /* Value is a local variable at SYMBOL_VALUE offset in stack frame. */
- LOC_ARG,
+ LOC_LOCAL,
- /* Value address is at SYMBOL_VALUE offset in arglist. */
+ /* Value not used; definition in SYMBOL_TYPE. Symbols in the domain
+ STRUCT_DOMAIN all have this class. */
- LOC_REF_ARG,
+ LOC_TYPEDEF,
- /* Value is in register number SYMBOL_VALUE. Just like LOC_REGISTER
- except this is an argument. Probably the cleaner way to handle
- this would be to separate address_class (which would include
- separate ARG and LOCAL to deal with FRAME_ARGS_ADDRESS versus
- FRAME_LOCALS_ADDRESS), and an is_argument flag.
+ /* Value is address SYMBOL_VALUE_ADDRESS in the code */
- For some symbol formats (stabs, for some compilers at least),
- the compiler generates two symbols, an argument and a register.
- In some cases we combine them to a single LOC_REGPARM in symbol
- reading, but currently not for all cases (e.g. it's passed on the
- stack and then loaded into a register). */
+ LOC_LABEL,
- LOC_REGPARM,
+ /* In a symbol table, value is SYMBOL_BLOCK_VALUE of a `struct block'.
+ In a partial symbol table, SYMBOL_VALUE_ADDRESS is the start address
+ of the block. Function names have this class. */
- /* Value is in specified register. Just like LOC_REGPARM except the
- register holds the address of the argument instead of the argument
- itself. This is currently used for the passing of structs and unions
- on sparc and hppa. It is also used for call by reference where the
- address is in a register, at least by mipsread.c. */
+ LOC_BLOCK,
- LOC_REGPARM_ADDR,
+ /* Value is a constant byte-sequence pointed to by SYMBOL_VALUE_BYTES, in
+ target byte order. */
- /* Value is a local variable at SYMBOL_VALUE offset in stack frame. */
+ LOC_CONST_BYTES,
- LOC_LOCAL,
+ /* Value is arg at SYMBOL_VALUE offset in stack frame. Differs from
+ LOC_LOCAL in that symbol is an argument; differs from LOC_ARG in
+ that we find it in the frame (get_frame_locals_address), not in
+ the arglist (get_frame_args_address). Added for i960, which
+ passes args in regs then copies to frame. */
- /* Value not used; definition in SYMBOL_TYPE. Symbols in the namespace
- STRUCT_NAMESPACE all have this class. */
+ LOC_LOCAL_ARG,
- LOC_TYPEDEF,
+ /* Value is at SYMBOL_VALUE offset from the current value of
+ register number SYMBOL_BASEREG. This exists mainly for the same
+ things that LOC_LOCAL and LOC_ARG do; but we need to do this
+ instead because on 88k DWARF gives us the offset from the
+ frame/stack pointer, rather than the offset from the "canonical
+ frame address" used by COFF, stabs, etc., and we don't know how
+ to convert between these until we start examining prologues.
- /* Value is address SYMBOL_VALUE_ADDRESS in the code */
+ Note that LOC_BASEREG is much less general than a DWARF expression.
+ We don't need the generality (at least not yet), and storing a general
+ DWARF expression would presumably take up more space than the existing
+ scheme. */
- LOC_LABEL,
+ LOC_BASEREG,
- /* In a symbol table, value is SYMBOL_BLOCK_VALUE of a `struct block'.
- In a partial symbol table, SYMBOL_VALUE_ADDRESS is the start address
- of the block. Function names have this class. */
+ /* Same as LOC_BASEREG but it is an argument. */
- LOC_BLOCK,
+ LOC_BASEREG_ARG,
- /* Value is a constant byte-sequence pointed to by SYMBOL_VALUE_BYTES, in
- target byte order. */
+ /* Value is at fixed address, but the address of the variable has
+ to be determined from the minimal symbol table whenever the
+ variable is referenced.
+ This happens if debugging information for a global symbol is
+ emitted and the corresponding minimal symbol is defined
+ in another object file or runtime common storage.
+ The linker might even remove the minimal symbol if the global
+ symbol is never referenced, in which case the symbol remains
+ unresolved. */
- LOC_CONST_BYTES,
+ LOC_UNRESOLVED,
- /* Value is arg at SYMBOL_VALUE offset in stack frame. Differs from
- LOC_LOCAL in that symbol is an argument; differs from LOC_ARG in
- that we find it in the frame (FRAME_LOCALS_ADDRESS), not in the
- arglist (FRAME_ARGS_ADDRESS). Added for i960, which passes args
- in regs then copies to frame. */
+ /* Value is at a thread-specific location calculated by a
+ target-specific method. This is used only by hppa. */
- LOC_LOCAL_ARG,
+ LOC_HP_THREAD_LOCAL_STATIC,
- /* Value is at SYMBOL_VALUE offset from the current value of
- register number SYMBOL_BASEREG. This exists mainly for the same
- things that LOC_LOCAL and LOC_ARG do; but we need to do this
- instead because on 88k DWARF gives us the offset from the
- frame/stack pointer, rather than the offset from the "canonical
- frame address" used by COFF, stabs, etc., and we don't know how
- to convert between these until we start examining prologues.
+ /* The variable does not actually exist in the program.
+ The value is ignored. */
- Note that LOC_BASEREG is much less general than a DWARF expression.
- We don't need the generality (at least not yet), and storing a general
- DWARF expression would presumably take up more space than the existing
- scheme. */
+ LOC_OPTIMIZED_OUT,
- LOC_BASEREG,
+ /* The variable is static, but actually lives at * (address).
+ * I.e. do an extra indirection to get to it.
+ * This is used on HP-UX to get at globals that are allocated
+ * in shared libraries, where references from images other
+ * than the one where the global was allocated are done
+ * with a level of indirection.
+ */
- /* Same as LOC_BASEREG but it is an argument. */
+ LOC_INDIRECT,
- LOC_BASEREG_ARG,
+ /* The variable's address is computed by a set of location
+ functions (see "struct location_funcs" below). */
+ LOC_COMPUTED,
- /* Value is at fixed address, but the address of the variable has
- to be determined from the minimal symbol table whenever the
- variable is referenced.
- This happens if debugging information for a global symbol is
- emitted and the corresponding minimal symbol is defined
- in another object file or runtime common storage.
- The linker might even remove the minimal symbol if the global
- symbol is never referenced, in which case the symbol remains
- unresolved. */
+ /* Same as LOC_COMPUTED, but for function arguments. */
+ LOC_COMPUTED_ARG
+};
- LOC_UNRESOLVED,
+/* A structure of function pointers describing the location of a
+ variable, structure member, or structure base class.
- /* Value is at a thread-specific location calculated by a
- target-specific method. */
+ These functions' BATON arguments are generic data pointers, holding
+ whatever data the functions need --- the code which provides this
+ structure also provides the actual contents of the baton, and
+ decides its form. However, there may be other rules about where
+ the baton data must be allocated; whoever is pointing to this
+ `struct location_funcs' object will know the rules. For example,
+ when a symbol S's location is LOC_COMPUTED, then
+ SYMBOL_LOCATION_FUNCS(S) is pointing to a location_funcs structure,
+ and SYMBOL_LOCATION_BATON(S) is the baton, which must be allocated
+ on the same obstack as the symbol itself. */
- LOC_THREAD_LOCAL_STATIC,
+struct location_funcs
+{
- /* The variable does not actually exist in the program.
- The value is ignored. */
+ /* Return the value of the variable SYMBOL, relative to the stack
+ frame FRAME. If the variable has been optimized out, return
+ zero.
- LOC_OPTIMIZED_OUT,
+ Iff `read_needs_frame (SYMBOL)' is zero, then FRAME may be zero. */
- /* The variable is static, but actually lives at * (address).
- * I.e. do an extra indirection to get to it.
- * This is used on HP-UX to get at globals that are allocated
- * in shared libraries, where references from images other
- * than the one where the global was allocated are done
- * with a level of indirection.
- */
+ struct value *(*read_variable) (struct symbol * symbol,
+ struct frame_info * frame);
- LOC_INDIRECT
+ /* Return non-zero if we need a frame to find the value of the SYMBOL. */
+ int (*read_needs_frame) (struct symbol * symbol);
- };
+ /* Write to STREAM a natural-language description of the location of
+ SYMBOL. */
+ int (*describe_location) (struct symbol * symbol, struct ui_file * stream);
-/* Linked list of symbol's live ranges. */
+ /* Tracepoint support. Append bytecodes to the tracepoint agent
+ expression AX that push the address of the object SYMBOL. Set
+ VALUE appropriately. Note --- for objects in registers, this
+ needn't emit any code; as long as it sets VALUE properly, then
+ the caller will generate the right code in the process of
+ treating this as an lvalue or rvalue. */
-struct range_list
- {
- CORE_ADDR start;
- CORE_ADDR end;
- struct range_list *next;
- };
+ void (*tracepoint_var_ref) (struct symbol * symbol, struct agent_expr * ax,
+ struct axs_value * value);
+};
-/* Linked list of aliases for a particular main/primary symbol. */
-struct alias_list
- {
- struct symbol *sym;
- struct alias_list *next;
- };
+/* This structure is space critical. See space comments at the top. */
struct symbol
- {
+{
- /* The general symbol info required for all types of symbols. */
+ /* The general symbol info required for all types of symbols. */
- struct general_symbol_info ginfo;
+ struct general_symbol_info ginfo;
- /* Data type of value */
+ /* Data type of value */
- struct type *type;
+ struct type *type;
- /* Name space code. */
+ /* Domain code. */
-#ifdef __MFC4__
- /* FIXME: don't conflict with C++'s namespace */
- /* would be safer to do a global change for all namespace identifiers. */
-#define namespace _namespace
-#endif
- namespace_enum namespace BYTE_BITFIELD;
+ ENUM_BITFIELD(domain_enum_tag) domain : 6;
- /* Address class */
+ /* Address class */
- enum address_class aclass BYTE_BITFIELD;
+ ENUM_BITFIELD(address_class) aclass : 6;
- /* Line number of definition. FIXME: Should we really make the assumption
- that nobody will try to debug files longer than 64K lines? What about
- machine generated programs? */
+ /* Line number of definition. FIXME: Should we really make the assumption
+ that nobody will try to debug files longer than 64K lines? What about
+ machine generated programs? */
- unsigned short line;
+ unsigned short line;
- /* Some symbols require an additional value to be recorded on a per-
- symbol basis. Stash those values here. */
+ /* Some symbols require an additional value to be recorded on a per-
+ symbol basis. Stash those values here. */
- union
- {
- /* Used by LOC_BASEREG and LOC_BASEREG_ARG. */
- short basereg;
- }
- aux_value;
-
-
- /* Link to a list of aliases for this symbol.
- Only a "primary/main symbol may have aliases. */
- struct alias_list *aliases;
+ union
+ {
+ /* Used by LOC_BASEREG and LOC_BASEREG_ARG. */
+ short basereg;
+
+ /* For a LOC_COMPUTED or LOC_COMPUTED_ARG symbol, this is the
+ baton and location_funcs structure to find its location. For a
+ LOC_BLOCK symbol for a function in a compilation unit compiled
+ with DWARF 2 information, this is information used internally
+ by the DWARF 2 code --- specifically, the location expression
+ for the frame base for this function. */
+ /* FIXME drow/2003-02-21: For the LOC_BLOCK case, it might be better
+ to add a magic symbol to the block containing this information,
+ or to have a generic debug info annotation slot for symbols. */
+ struct
+ {
+ void *baton;
+ struct location_funcs *funcs;
+ } loc;
+ }
+ aux_value;
- /* List of ranges where this symbol is active. This is only
- used by alias symbols at the current time. */
- struct range_list *ranges;
- };
+ struct symbol *hash_next;
+};
-#define SYMBOL_NAMESPACE(symbol) (symbol)->namespace
+#define SYMBOL_DOMAIN(symbol) (symbol)->domain
#define SYMBOL_CLASS(symbol) (symbol)->aclass
#define SYMBOL_TYPE(symbol) (symbol)->type
#define SYMBOL_LINE(symbol) (symbol)->line
#define SYMBOL_BASEREG(symbol) (symbol)->aux_value.basereg
-#define SYMBOL_ALIASES(symbol) (symbol)->aliases
-#define SYMBOL_RANGES(symbol) (symbol)->ranges
+#define SYMBOL_OBJFILE(symbol) (symbol)->aux_value.objfile
+#define SYMBOL_LOCATION_BATON(symbol) (symbol)->aux_value.loc.baton
+#define SYMBOL_LOCATION_FUNCS(symbol) (symbol)->aux_value.loc.funcs
\f
-/* A partial_symbol records the name, namespace, and address class of
+/* A partial_symbol records the name, domain, and address class of
symbols whose types we have not parsed yet. For functions, it also
contains their memory address, so we can find them from a PC value.
Each partial_symbol sits in a partial_symtab, all of which are chained
on a partial symtab list and which points to the corresponding
normal symtab once the partial_symtab has been referenced. */
+/* This structure is space critical. See space comments at the top. */
+
struct partial_symbol
- {
+{
- /* The general symbol info required for all types of symbols. */
+ /* The general symbol info required for all types of symbols. */
- struct general_symbol_info ginfo;
+ struct general_symbol_info ginfo;
- /* Name space code. */
+ /* Name space code. */
- namespace_enum namespace BYTE_BITFIELD;
+ ENUM_BITFIELD(domain_enum_tag) domain : 6;
- /* Address class (for info_symbols) */
+ /* Address class (for info_symbols) */
- enum address_class aclass BYTE_BITFIELD;
+ ENUM_BITFIELD(address_class) aclass : 6;
- };
+};
-#define PSYMBOL_NAMESPACE(psymbol) (psymbol)->namespace
+#define PSYMBOL_DOMAIN(psymbol) (psymbol)->domain
#define PSYMBOL_CLASS(psymbol) (psymbol)->aclass
\f
-/* Source-file information. This describes the relation between source files,
- ine numbers and addresses in the program text. */
-
-struct sourcevector
- {
- int length; /* Number of source files described */
- struct source *source[1]; /* Descriptions of the files */
- };
-
/* Each item represents a line-->pc (or the reverse) mapping. This is
somewhat more wasteful of space than one might wish, but since only
the files which are actually debugged are read in to core, we don't
waste much space. */
struct linetable_entry
- {
- int line;
- CORE_ADDR pc;
- };
+{
+ int line;
+ CORE_ADDR pc;
+};
/* The order of entries in the linetable is significant. They should
be sorted by increasing values of the pc field. If there is more than
30 0x300
10 0x400 - for the increment part of a for stmt.
- */
+ If an entry has a line number of zero, it marks the start of a PC
+ range for which no line number information is available. It is
+ acceptable, though wasteful of table space, for such a range to be
+ zero length. */
struct linetable
- {
- int nitems;
+{
+ int nitems;
- /* Actually NITEMS elements. If you don't like this use of the
- `struct hack', you can shove it up your ANSI (seriously, if the
- committee tells us how to do it, we can probably go along). */
- struct linetable_entry item[1];
- };
-
-/* All the information on one source file. */
-
-struct source
- {
- char *name; /* Name of file */
- struct linetable contents;
- };
+ /* Actually NITEMS elements. If you don't like this use of the
+ `struct hack', you can shove it up your ANSI (seriously, if the
+ committee tells us how to do it, we can probably go along). */
+ struct linetable_entry item[1];
+};
/* How to relocate the symbols from each section in a symbol file.
Each struct contains an array of offsets.
extract offset values in the struct. */
struct section_offsets
- {
- CORE_ADDR offsets[1]; /* As many as needed. */
- };
+{
+ CORE_ADDR offsets[1]; /* As many as needed. */
+};
-#define ANOFFSET(secoff, whichone) (secoff->offsets[whichone])
+#define ANOFFSET(secoff, whichone) \
+ ((whichone == -1) \
+ ? (internal_error (__FILE__, __LINE__, "Section index is uninitialized"), -1) \
+ : secoff->offsets[whichone])
-/* The maximum possible size of a section_offsets table. */
-
-#define SIZEOF_SECTION_OFFSETS \
+/* The size of a section_offsets table for N sections. */
+#define SIZEOF_N_SECTION_OFFSETS(n) \
(sizeof (struct section_offsets) \
- + sizeof (((struct section_offsets *) 0)->offsets) * (SECT_OFF_MAX-1))
+ + sizeof (((struct section_offsets *) 0)->offsets) * ((n)-1))
/* Each source file or header is represented by a struct symtab.
These objects are chained through the `next' field. */
struct symtab
- {
+{
- /* Chain of all existing symtabs. */
+ /* Chain of all existing symtabs. */
- struct symtab *next;
+ struct symtab *next;
- /* List of all symbol scope blocks for this symtab. May be shared
- between different symtabs (and normally is for all the symtabs
- in a given compilation unit). */
+ /* List of all symbol scope blocks for this symtab. May be shared
+ between different symtabs (and normally is for all the symtabs
+ in a given compilation unit). */
- struct blockvector *blockvector;
+ struct blockvector *blockvector;
- /* Table mapping core addresses to line numbers for this file.
- Can be NULL if none. Never shared between different symtabs. */
+ /* Table mapping core addresses to line numbers for this file.
+ Can be NULL if none. Never shared between different symtabs. */
- struct linetable *linetable;
+ struct linetable *linetable;
- /* Section in objfile->section_offsets for the blockvector and
- the linetable. Probably always SECT_OFF_TEXT. */
+ /* Section in objfile->section_offsets for the blockvector and
+ the linetable. Probably always SECT_OFF_TEXT. */
- int block_line_section;
+ int block_line_section;
- /* If several symtabs share a blockvector, exactly one of them
- should be designated the primary, so that the blockvector
- is relocated exactly once by objfile_relocate. */
+ /* If several symtabs share a blockvector, exactly one of them
+ should be designated the primary, so that the blockvector
+ is relocated exactly once by objfile_relocate. */
- int primary;
+ int primary;
- /* Name of this source file. */
+ /* The macro table for this symtab. Like the blockvector, this
+ may be shared between different symtabs --- and normally is for
+ all the symtabs in a given compilation unit. */
+ struct macro_table *macro_table;
- char *filename;
+ /* Name of this source file. */
- /* Directory in which it was compiled, or NULL if we don't know. */
+ char *filename;
- char *dirname;
+ /* Directory in which it was compiled, or NULL if we don't know. */
- /* This component says how to free the data we point to:
- free_contents => do a tree walk and free each object.
- free_nothing => do nothing; some other symtab will free
- the data this one uses.
- free_linetable => free just the linetable. FIXME: Is this redundant
- with the primary field? */
+ char *dirname;
- enum free_code
- {
- free_nothing, free_contents, free_linetable
- }
- free_code;
+ /* This component says how to free the data we point to:
+ free_contents => do a tree walk and free each object.
+ free_nothing => do nothing; some other symtab will free
+ the data this one uses.
+ free_linetable => free just the linetable. FIXME: Is this redundant
+ with the primary field? */
+
+ enum free_code
+ {
+ free_nothing, free_contents, free_linetable
+ }
+ free_code;
- /* Pointer to one block of storage to be freed, if nonzero. */
- /* This is IN ADDITION to the action indicated by free_code. */
+ /* A function to call to free space, if necessary. This is IN
+ ADDITION to the action indicated by free_code. */
- char *free_ptr;
+ void (*free_func)(struct symtab *symtab);
- /* Total number of lines found in source file. */
+ /* Total number of lines found in source file. */
- int nlines;
+ int nlines;
- /* line_charpos[N] is the position of the (N-1)th line of the
- source file. "position" means something we can lseek() to; it
- is not guaranteed to be useful any other way. */
+ /* line_charpos[N] is the position of the (N-1)th line of the
+ source file. "position" means something we can lseek() to; it
+ is not guaranteed to be useful any other way. */
- int *line_charpos;
+ int *line_charpos;
- /* Language of this source file. */
+ /* Language of this source file. */
- enum language language;
+ enum language language;
- /* String that identifies the format of the debugging information, such
- as "stabs", "dwarf 1", "dwarf 2", "coff", etc. This is mostly useful
- for automated testing of gdb but may also be information that is
- useful to the user. */
+ /* String that identifies the format of the debugging information, such
+ as "stabs", "dwarf 1", "dwarf 2", "coff", etc. This is mostly useful
+ for automated testing of gdb but may also be information that is
+ useful to the user. */
- char *debugformat;
+ char *debugformat;
- /* String of version information. May be zero. */
+ /* String of version information. May be zero. */
- char *version;
+ char *version;
- /* Full name of file as found by searching the source path.
- NULL if not yet known. */
+ /* Full name of file as found by searching the source path.
+ NULL if not yet known. */
- char *fullname;
+ char *fullname;
- /* Object file from which this symbol information was read. */
+ /* Object file from which this symbol information was read. */
- struct objfile *objfile;
+ struct objfile *objfile;
- };
+};
#define BLOCKVECTOR(symtab) (symtab)->blockvector
#define LINETABLE(symtab) (symtab)->linetable
style execution of a bunch of .o's. */
struct partial_symtab
- {
+{
+
+ /* Chain of all existing partial symtabs. */
+
+ struct partial_symtab *next;
- /* Chain of all existing partial symtabs. */
+ /* Name of the source file which this partial_symtab defines */
- struct partial_symtab *next;
+ char *filename;
- /* Name of the source file which this partial_symtab defines */
+ /* Full path of the source file. NULL if not known. */
- char *filename;
+ char *fullname;
- /* Information about the object file from which symbols should be read. */
+ /* Information about the object file from which symbols should be read. */
- struct objfile *objfile;
+ struct objfile *objfile;
- /* Set of relocation offsets to apply to each section. */
+ /* Set of relocation offsets to apply to each section. */
- struct section_offsets *section_offsets;
+ struct section_offsets *section_offsets;
- /* Range of text addresses covered by this file; texthigh is the
- beginning of the next section. */
+ /* Range of text addresses covered by this file; texthigh is the
+ beginning of the next section. */
- CORE_ADDR textlow;
- CORE_ADDR texthigh;
+ CORE_ADDR textlow;
+ CORE_ADDR texthigh;
- /* Array of pointers to all of the partial_symtab's which this one
- depends on. Since this array can only be set to previous or
- the current (?) psymtab, this dependency tree is guaranteed not
- to have any loops. "depends on" means that symbols must be read
- for the dependencies before being read for this psymtab; this is
- for type references in stabs, where if foo.c includes foo.h, declarations
- in foo.h may use type numbers defined in foo.c. For other debugging
- formats there may be no need to use dependencies. */
+ /* Array of pointers to all of the partial_symtab's which this one
+ depends on. Since this array can only be set to previous or
+ the current (?) psymtab, this dependency tree is guaranteed not
+ to have any loops. "depends on" means that symbols must be read
+ for the dependencies before being read for this psymtab; this is
+ for type references in stabs, where if foo.c includes foo.h, declarations
+ in foo.h may use type numbers defined in foo.c. For other debugging
+ formats there may be no need to use dependencies. */
- struct partial_symtab **dependencies;
+ struct partial_symtab **dependencies;
- int number_of_dependencies;
+ int number_of_dependencies;
- /* Global symbol list. This list will be sorted after readin to
- improve access. Binary search will be the usual method of
- finding a symbol within it. globals_offset is an integer offset
- within global_psymbols[]. */
+ /* Global symbol list. This list will be sorted after readin to
+ improve access. Binary search will be the usual method of
+ finding a symbol within it. globals_offset is an integer offset
+ within global_psymbols[]. */
- int globals_offset;
- int n_global_syms;
+ int globals_offset;
+ int n_global_syms;
- /* Static symbol list. This list will *not* be sorted after readin;
- to find a symbol in it, exhaustive search must be used. This is
- reasonable because searches through this list will eventually
- lead to either the read in of a files symbols for real (assumed
- to take a *lot* of time; check) or an error (and we don't care
- how long errors take). This is an offset and size within
- static_psymbols[]. */
+ /* Static symbol list. This list will *not* be sorted after readin;
+ to find a symbol in it, exhaustive search must be used. This is
+ reasonable because searches through this list will eventually
+ lead to either the read in of a files symbols for real (assumed
+ to take a *lot* of time; check) or an error (and we don't care
+ how long errors take). This is an offset and size within
+ static_psymbols[]. */
- int statics_offset;
- int n_static_syms;
+ int statics_offset;
+ int n_static_syms;
- /* Pointer to symtab eventually allocated for this source file, 0 if
- !readin or if we haven't looked for the symtab after it was readin. */
+ /* Pointer to symtab eventually allocated for this source file, 0 if
+ !readin or if we haven't looked for the symtab after it was readin. */
- struct symtab *symtab;
+ struct symtab *symtab;
- /* Pointer to function which will read in the symtab corresponding to
- this psymtab. */
+ /* Pointer to function which will read in the symtab corresponding to
+ this psymtab. */
- void (*read_symtab) (struct partial_symtab *);
+ void (*read_symtab) (struct partial_symtab *);
- /* Information that lets read_symtab() locate the part of the symbol table
- that this psymtab corresponds to. This information is private to the
- format-dependent symbol reading routines. For further detail examine
- the various symbol reading modules. Should really be (void *) but is
- (char *) as with other such gdb variables. (FIXME) */
+ /* Information that lets read_symtab() locate the part of the symbol table
+ that this psymtab corresponds to. This information is private to the
+ format-dependent symbol reading routines. For further detail examine
+ the various symbol reading modules. Should really be (void *) but is
+ (char *) as with other such gdb variables. (FIXME) */
- char *read_symtab_private;
+ char *read_symtab_private;
- /* Non-zero if the symtab corresponding to this psymtab has been readin */
+ /* Non-zero if the symtab corresponding to this psymtab has been readin */
- unsigned char readin;
- };
+ unsigned char readin;
+};
/* A fast way to get from a psymtab to its symtab (after the first time). */
#define PSYMTAB_TO_SYMTAB(pst) \
#define VTBL_FNADDR_OFFSET 2
-/* Macro that yields non-zero value iff NAME is the prefix for C++ operator
- names. If you leave out the parenthesis here you will lose!
- Currently 'o' 'p' CPLUS_MARKER is used for both the symbol in the
- symbol-file and the names in gdb's symbol table.
- Note that this macro is g++ specific (FIXME). */
-
-#define OPNAME_PREFIX_P(NAME) \
- ((NAME)[0] == 'o' && (NAME)[1] == 'p' && is_cplus_marker ((NAME)[2]))
-
-/* Macro that yields non-zero value iff NAME is the prefix for C++ vtbl
- names. Note that this macro is g++ specific (FIXME).
- '_vt$' is the old cfront-style vtables; '_VT$' is the new
- style, using thunks (where '$' is really CPLUS_MARKER). */
-
-#define VTBL_PREFIX_P(NAME) \
- (((NAME)[0] == '_' \
- && (((NAME)[1] == 'V' && (NAME)[2] == 'T') \
- || ((NAME)[1] == 'v' && (NAME)[2] == 't')) \
- && is_cplus_marker ((NAME)[3])) || ((NAME)[0]=='_' && (NAME)[1]=='_' \
- && (NAME)[2]=='v' && (NAME)[3]=='t' && (NAME)[4]=='_'))
-
-/* Macro that yields non-zero value iff NAME is the prefix for C++ destructor
- names. Note that this macro is g++ specific (FIXME). */
-
-#define DESTRUCTOR_PREFIX_P(NAME) \
- ((NAME)[0] == '_' && is_cplus_marker ((NAME)[1]) && (NAME)[2] == '_')
-\f
-
/* External variables and functions for the objects described above. */
-/* This symtab variable specifies the current file for printing source lines */
-
-extern struct symtab *current_source_symtab;
-
-/* This is the next line to print for listing source lines. */
-
-extern int current_source_line;
-
/* See the comment in symfile.c about how current_objfile is used. */
extern struct objfile *current_objfile;
/* lookup a symbol table by source file name */
-extern struct symtab *lookup_symtab (char *);
+extern struct symtab *lookup_symtab (const char *);
/* lookup a symbol by name (optional block, optional symtab) */
extern struct symbol *lookup_symbol (const char *, const struct block *,
- const namespace_enum, int *,
+ const domain_enum, int *,
struct symtab **);
+/* A default version of lookup_symbol_nonlocal for use by languages
+ that can't think of anything better to do. */
+
+extern struct symbol *basic_lookup_symbol_nonlocal (const char *,
+ const char *,
+ const struct block *,
+ const domain_enum,
+ struct symtab **);
+
+/* Some helper functions for languages that need to write their own
+ lookup_symbol_nonlocal functions. */
+
+/* Lookup a symbol in the static block associated to BLOCK, if there
+ is one; do nothing if BLOCK is NULL or a global block. */
+
+extern struct symbol *lookup_symbol_static (const char *name,
+ const char *linkage_name,
+ const struct block *block,
+ const domain_enum domain,
+ struct symtab **symtab);
+
+/* Lookup a symbol in all files' global blocks (searching psymtabs if
+ necessary). */
+
+extern struct symbol *lookup_symbol_global (const char *name,
+ const char *linkage_name,
+ const domain_enum domain,
+ struct symtab **symtab);
+
+/* Lookup a symbol within the block BLOCK. This, unlike
+ lookup_symbol_block, will set SYMTAB and BLOCK_FOUND correctly, and
+ will fix up the symbol if necessary. */
+
+extern struct symbol *lookup_symbol_aux_block (const char *name,
+ const char *linkage_name,
+ const struct block *block,
+ const domain_enum domain,
+ struct symtab **symtab);
+
+/* Lookup a partial symbol. */
+
+extern struct partial_symbol *lookup_partial_symbol (struct partial_symtab *,
+ const char *,
+ const char *, int,
+ domain_enum);
+
/* lookup a symbol by name, within a specified block */
extern struct symbol *lookup_block_symbol (const struct block *, const char *,
- const namespace_enum);
+ const char *,
+ const domain_enum);
/* lookup a [struct, union, enum] by name, within a specified block */
extern struct type *lookup_enum (char *, struct block *);
-/* lookup the function corresponding to the block */
-
-extern struct symbol *block_function (struct block *);
-
/* from blockframe.c: */
/* lookup the function symbol corresponding to the address */
/* lookup function from address, return name, start addr and end addr */
-extern int
-find_pc_partial_function (CORE_ADDR, char **, CORE_ADDR *, CORE_ADDR *);
+extern int find_pc_partial_function (CORE_ADDR, char **, CORE_ADDR *,
+ CORE_ADDR *);
extern void clear_pc_function_cache (void);
-extern int
-find_pc_sect_partial_function (CORE_ADDR, asection *,
- char **, CORE_ADDR *, CORE_ADDR *);
+extern int find_pc_sect_partial_function (CORE_ADDR, asection *,
+ char **, CORE_ADDR *, CORE_ADDR *);
/* from symtab.c: */
/* lookup partial symbol table by filename */
-extern struct partial_symtab *lookup_partial_symtab (char *);
+extern struct partial_symtab *lookup_partial_symtab (const char *);
/* lookup partial symbol table by address */
extern int find_pc_line_pc_range (CORE_ADDR, CORE_ADDR *, CORE_ADDR *);
-extern int contained_in (struct block *, struct block *);
-
extern void reread_symbols (void);
extern struct type *lookup_transparent_type (const char *);
enum minimal_symbol_type,
char *info, int section, asection * bfd_section, struct objfile *);
-#ifdef SOFUN_ADDRESS_MAYBE_MISSING
-extern CORE_ADDR find_stab_function_addr (char *, char *, struct objfile *);
-#endif
-
extern unsigned int msymbol_hash_iw (const char *);
extern unsigned int msymbol_hash (const char *);
struct objfile *);
extern struct minimal_symbol *lookup_minimal_symbol_text (const char *,
- const char *,
struct objfile *);
struct minimal_symbol *lookup_minimal_symbol_solib_trampoline (const char *,
- const char *,
struct objfile
*);
extern void msymbols_sort (struct objfile *objfile);
struct symtab_and_line
- {
- struct symtab *symtab;
- asection *section;
- /* Line number. Line numbers start at 1 and proceed through symtab->nlines.
- 0 is never a valid line number; it is used to indicate that line number
- information is not available. */
- int line;
-
- CORE_ADDR pc;
- CORE_ADDR end;
- };
-
-#define INIT_SAL(sal) { \
- (sal)->symtab = 0; \
- (sal)->section = 0; \
- (sal)->line = 0; \
- (sal)->pc = 0; \
- (sal)->end = 0; \
-}
+{
+ struct symtab *symtab;
+ asection *section;
+ /* Line number. Line numbers start at 1 and proceed through symtab->nlines.
+ 0 is never a valid line number; it is used to indicate that line number
+ information is not available. */
+ int line;
+
+ CORE_ADDR pc;
+ CORE_ADDR end;
+};
+
+extern void init_sal (struct symtab_and_line *sal);
struct symtabs_and_lines
- {
- struct symtab_and_line *sals;
- int nelts;
- };
+{
+ struct symtab_and_line *sals;
+ int nelts;
+};
\f
/* Enums for exception-handling support */
enum exception_event_kind
- {
- EX_EVENT_THROW,
- EX_EVENT_CATCH
- };
+{
+ EX_EVENT_THROW,
+ EX_EVENT_CATCH
+};
/* Type for returning info about an exception */
struct exception_event_record
- {
- enum exception_event_kind kind;
- struct symtab_and_line throw_sal;
- struct symtab_and_line catch_sal;
- /* This may need to be extended in the future, if
- some platforms allow reporting more information,
- such as point of rethrow, type of exception object,
- type expected by catch clause, etc. */
- };
+{
+ enum exception_event_kind kind;
+ struct symtab_and_line throw_sal;
+ struct symtab_and_line catch_sal;
+ /* This may need to be extended in the future, if
+ some platforms allow reporting more information,
+ such as point of rethrow, type of exception object,
+ type expected by catch clause, etc. */
+};
#define CURRENT_EXCEPTION_KIND (current_exception_event->kind)
#define CURRENT_EXCEPTION_CATCH_SAL (current_exception_event->catch_sal)
extern struct symtab_and_line find_pc_sect_line (CORE_ADDR, asection *, int);
-/* Given an address, return the nearest symbol at or below it in memory.
- Optionally return the symtab it's from through 2nd arg, and the
- address in inferior memory of the symbol through 3rd arg. */
-
-extern struct symbol *find_addr_symbol (CORE_ADDR, struct symtab **,
- CORE_ADDR *);
-
/* Given a symtab and line number, return the pc there. */
extern int find_line_pc (struct symtab *, int, CORE_ADDR *);
-extern int
-find_line_pc_range (struct symtab_and_line, CORE_ADDR *, CORE_ADDR *);
+extern int find_line_pc_range (struct symtab_and_line, CORE_ADDR *,
+ CORE_ADDR *);
extern void resolve_sal_pc (struct symtab_and_line *);
extern struct symtabs_and_lines decode_line_spec_1 (char *, int);
-extern struct symtabs_and_lines
-decode_line_1 (char **, int, struct symtab *, int, char ***);
-
/* Symmisc.c */
void maintenance_print_symbols (char *, int);
void maintenance_print_objfiles (char *, int);
+void maintenance_info_symtabs (char *, int);
+
+void maintenance_info_psymtabs (char *, int);
+
void maintenance_check_symtabs (char *, int);
/* maint.c */
extern char **make_symbol_completion_list (char *, char *);
-extern struct symbol **make_symbol_overload_list (struct symbol *);
+extern char **make_file_symbol_completion_list (char *, char *, char *);
+
+extern char **make_source_files_completion_list (char *, char *);
/* symtab.c */
extern struct partial_symtab *find_main_psymtab (void);
-/* blockframe.c */
-
-extern struct blockvector *blockvector_for_pc (CORE_ADDR, int *);
+extern struct symtab *find_line_symtab (struct symtab *, int, int *, int *);
-extern struct blockvector *blockvector_for_pc_sect (CORE_ADDR, asection *,
- int *, struct symtab *);
+extern struct symtab_and_line find_function_start_sal (struct symbol *sym,
+ int);
/* symfile.c */
/* Symbol searching */
/* When using search_symbols, a list of the following structs is returned.
- Callers must free the search list using free_symbol_search! */
+ Callers must free the search list using free_search_symbols! */
struct symbol_search
- {
- /* The block in which the match was found. Could be, for example,
- STATIC_BLOCK or GLOBAL_BLOCK. */
- int block;
+{
+ /* The block in which the match was found. Could be, for example,
+ STATIC_BLOCK or GLOBAL_BLOCK. */
+ int block;
- /* Information describing what was found.
+ /* Information describing what was found.
- If symtab abd symbol are NOT NULL, then information was found
- for this match. */
- struct symtab *symtab;
- struct symbol *symbol;
+ If symtab abd symbol are NOT NULL, then information was found
+ for this match. */
+ struct symtab *symtab;
+ struct symbol *symbol;
- /* If msymbol is non-null, then a match was made on something for
- which only minimal_symbols exist. */
- struct minimal_symbol *msymbol;
+ /* If msymbol is non-null, then a match was made on something for
+ which only minimal_symbols exist. */
+ struct minimal_symbol *msymbol;
- /* A link to the next match, or NULL for the end. */
- struct symbol_search *next;
- };
+ /* A link to the next match, or NULL for the end. */
+ struct symbol_search *next;
+};
-extern void search_symbols (char *, namespace_enum, int, char **,
+extern void search_symbols (char *, domain_enum, int, char **,
struct symbol_search **);
extern void free_search_symbols (struct symbol_search *);
-extern struct cleanup *make_cleanup_free_search_symbols (struct symbol_search *);
+extern struct cleanup *make_cleanup_free_search_symbols (struct symbol_search
+ *);
+
+/* The name of the ``main'' function.
+ FIXME: cagney/2001-03-20: Can't make main_name() const since some
+ of the calling code currently assumes that the string isn't
+ const. */
+extern void set_main_name (const char *name);
+extern /*const */ char *main_name (void);
#endif /* !defined(SYMTAB_H) */