diff options
Diffstat (limited to 'gdb/symtab.h')
| -rw-r--r-- | gdb/symtab.h | 87 |
1 files changed, 44 insertions, 43 deletions
diff --git a/gdb/symtab.h b/gdb/symtab.h index ce1c9fa..b5d9ffd 100644 --- a/gdb/symtab.h +++ b/gdb/symtab.h @@ -1,7 +1,7 @@ /* Symbol table definitions for GDB. Copyright 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, - 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Free Software + 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc. This file is part of GDB. @@ -88,10 +88,10 @@ struct agent_expr; 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. */ + name is allocated on the objfile_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; @@ -311,12 +311,13 @@ struct minimal_symbol 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 + /* 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 allocated on the + objfile_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 @@ -546,21 +547,12 @@ enum address_class LOC_COMPUTED_ARG }; -/* A structure of function pointers describing the location of a - variable, structure member, or structure base class. - - 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. */ - -struct location_funcs +/* The methods needed to implement a symbol class. These methods can + use the symbol's .aux_value for additional per-symbol information. + + At present this is only used to implement location expressions. */ + +struct symbol_ops { /* Return the value of the variable SYMBOL, relative to the stack @@ -608,6 +600,12 @@ struct symbol ENUM_BITFIELD(domain_enum_tag) domain : 6; /* Address class */ + /* NOTE: cagney/2003-11-02: The fields "aclass" and "ops" contain + overlapping information. By creating a per-aclass ops vector, or + using the aclass as an index into an ops table, the aclass and + ops fields can be merged. The latter, for instance, would shave + 32-bits from each symbol (relative to a symbol lookup, any table + index overhead would be in the noise). */ ENUM_BITFIELD(address_class) aclass : 6; @@ -617,28 +615,30 @@ struct symbol unsigned short line; - /* Some symbols require an additional value to be recorded on a per- - symbol basis. Stash those values here. */ + /* Method's for symbol's of this class. */ + /* NOTE: cagney/2003-11-02: See comment above attached to "aclass". */ + + const struct symbol_ops *ops; + + /* Some symbols require additional information to be recorded on a + per- symbol basis. Stash those values here. */ 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. */ + /* An arbitrary data pointer. Note that this data must be + allocated using the same obstack as the symbol itself. */ + /* So far it is only used by LOC_COMPUTED and LOC_COMPUTED_ARG to + find the location location information. 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; + void *ptr; } aux_value; @@ -652,8 +652,8 @@ struct symbol #define SYMBOL_LINE(symbol) (symbol)->line #define SYMBOL_BASEREG(symbol) (symbol)->aux_value.basereg #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 +#define SYMBOL_OPS(symbol) (symbol)->ops +#define SYMBOL_LOCATION_BATON(symbol) (symbol)->aux_value.ptr /* A partial_symbol records the name, domain, and address class of symbols whose types we have not parsed yet. For functions, it also @@ -859,7 +859,7 @@ struct symtab Even after the source file has been read into a symtab, the partial_symtab remains around. They are allocated on an obstack, - psymbol_obstack. FIXME, this is bad for dynamic linking or VxWorks- + objfile_obstack. FIXME, this is bad for dynamic linking or VxWorks- style execution of a bunch of .o's. */ struct partial_symtab @@ -1107,6 +1107,7 @@ extern int find_pc_line_pc_range (CORE_ADDR, CORE_ADDR *, CORE_ADDR *); extern void reread_symbols (void); extern struct type *lookup_transparent_type (const char *); +extern struct type *basic_lookup_transparent_type (const char *); /* Macro for name of symbol to indicate a file compiled with gcc. */ |