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309 lines
8.6 KiB
C
309 lines
8.6 KiB
C
/* Build symbol tables in GDB's internal format.
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Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1995, 1996,
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1997, 1998, 1999, 2000, 2002, 2003, 2007, 2008, 2009, 2010
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Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#if !defined (BUILDSYM_H)
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#define BUILDSYM_H 1
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struct objfile;
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struct symbol;
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struct addrmap;
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/* This module provides definitions used for creating and adding to
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the symbol table. These routines are called from various symbol-
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file-reading routines.
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They originated in dbxread.c of gdb-4.2, and were split out to
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make xcoffread.c more maintainable by sharing code.
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Variables declared in this file can be defined by #define-ing the
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name EXTERN to null. It is used to declare variables that are
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normally extern, but which get defined in a single module using
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this technique. */
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struct block;
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#ifndef EXTERN
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#define EXTERN extern
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#endif
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#define HASHSIZE 127 /* Size of things hashed via
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hashname() */
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/* Name of source file whose symbol data we are now processing. This
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comes from a symbol of type N_SO for stabs. For Dwarf it comes from the
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DW_AT_name attribute of a DW_TAG_compile_unit DIE. */
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EXTERN char *last_source_file;
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/* Core address of start of text of current source file. This too
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comes from the N_SO symbol. For Dwarf it typically comes from the
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DW_AT_low_pc attribute of a DW_TAG_compile_unit DIE. */
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EXTERN CORE_ADDR last_source_start_addr;
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/* The list of sub-source-files within the current individual
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compilation. Each file gets its own symtab with its own linetable
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and associated info, but they all share one blockvector. */
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struct subfile
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{
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struct subfile *next;
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char *name;
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char *dirname;
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struct linetable *line_vector;
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int line_vector_length;
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enum language language;
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char *producer;
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char *debugformat;
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struct symtab *symtab;
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};
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EXTERN struct subfile *current_subfile;
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/* Global variable which, when set, indicates that we are processing a
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.o file compiled with gcc */
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EXTERN unsigned char processing_gcc_compilation;
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/* When set, we are processing a .o file compiled by sun acc. This is
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misnamed; it refers to all stabs-in-elf implementations which use
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N_UNDF the way Sun does, including Solaris gcc. Hopefully all
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stabs-in-elf implementations ever invented will choose to be
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compatible. */
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EXTERN unsigned char processing_acc_compilation;
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/* Count symbols as they are processed, for error messages. */
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EXTERN unsigned int symnum;
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/* Record the symbols defined for each context in a list. We don't
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create a struct block for the context until we know how long to
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make it. */
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#define PENDINGSIZE 100
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struct pending
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{
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struct pending *next;
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int nsyms;
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struct symbol *symbol[PENDINGSIZE];
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};
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/* Here are the three lists that symbols are put on. */
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/* static at top level, and types */
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EXTERN struct pending *file_symbols;
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/* global functions and variables */
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EXTERN struct pending *global_symbols;
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/* everything local to lexical context */
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EXTERN struct pending *local_symbols;
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/* func params local to lexical context */
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EXTERN struct pending *param_symbols;
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/* "using" directives local to lexical context. */
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EXTERN struct using_direct *using_directives;
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/* Stack representing unclosed lexical contexts (that will become
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blocks, eventually). */
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struct context_stack
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{
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/* Outer locals at the time we entered */
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struct pending *locals;
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/* Pending func params at the time we entered */
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struct pending *params;
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/* Pending using directives at the time we entered. */
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struct using_direct *using_directives;
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/* Pointer into blocklist as of entry */
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struct pending_block *old_blocks;
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/* Name of function, if any, defining context */
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struct symbol *name;
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/* PC where this context starts */
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CORE_ADDR start_addr;
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/* Temp slot for exception handling. */
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CORE_ADDR end_addr;
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/* For error-checking matching push/pop */
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int depth;
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};
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EXTERN struct context_stack *context_stack;
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/* Index of first unused entry in context stack. */
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EXTERN int context_stack_depth;
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/* Currently allocated size of context stack. */
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EXTERN int context_stack_size;
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/* Non-zero if the context stack is empty. */
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#define outermost_context_p() (context_stack_depth == 0)
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/* Nonzero if within a function (so symbols should be local, if
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nothing says specifically). */
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EXTERN int within_function;
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/* List of blocks already made (lexical contexts already closed).
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This is used at the end to make the blockvector. */
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struct pending_block
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{
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struct pending_block *next;
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struct block *block;
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};
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/* Pointer to the head of a linked list of symbol blocks which have
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already been finalized (lexical contexts already closed) and which
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are just waiting to be built into a blockvector when finalizing the
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associated symtab. */
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EXTERN struct pending_block *pending_blocks;
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struct subfile_stack
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{
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struct subfile_stack *next;
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char *name;
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};
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EXTERN struct subfile_stack *subfile_stack;
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#define next_symbol_text(objfile) (*next_symbol_text_func)(objfile)
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/* Function to invoke get the next symbol. Return the symbol name. */
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EXTERN char *(*next_symbol_text_func) (struct objfile *);
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/* Vector of types defined so far, indexed by their type numbers.
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Used for both stabs and coff. (In newer sun systems, dbx uses a
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pair of numbers in parens, as in "(SUBFILENUM,NUMWITHINSUBFILE)".
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Then these numbers must be translated through the type_translations
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hash table to get the index into the type vector.) */
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EXTERN struct type **type_vector;
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/* Number of elements allocated for type_vector currently. */
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EXTERN int type_vector_length;
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/* Initial size of type vector. Is realloc'd larger if needed, and
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realloc'd down to the size actually used, when completed. */
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#define INITIAL_TYPE_VECTOR_LENGTH 160
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extern void add_free_pendings (struct pending *list);
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extern void add_symbol_to_list (struct symbol *symbol,
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struct pending **listhead);
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extern struct symbol *find_symbol_in_list (struct pending *list,
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char *name, int length);
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extern struct block *finish_block (struct symbol *symbol,
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struct pending **listhead,
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struct pending_block *old_blocks,
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CORE_ADDR start, CORE_ADDR end,
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struct objfile *objfile);
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extern void record_block_range (struct block *,
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CORE_ADDR start, CORE_ADDR end_inclusive);
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extern void really_free_pendings (void *dummy);
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extern void start_subfile (char *name, char *dirname);
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extern void patch_subfile_names (struct subfile *subfile, char *name);
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extern void push_subfile (void);
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extern char *pop_subfile (void);
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extern struct symtab *end_symtab (CORE_ADDR end_addr,
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struct objfile *objfile, int section);
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/* Defined in stabsread.c. */
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extern void scan_file_globals (struct objfile *objfile);
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extern void buildsym_new_init (void);
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extern void buildsym_init (void);
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extern struct context_stack *push_context (int desc, CORE_ADDR valu);
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extern struct context_stack *pop_context (void);
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extern void record_line (struct subfile *subfile, int line, CORE_ADDR pc);
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extern void start_symtab (char *name, char *dirname, CORE_ADDR start_addr);
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extern int hashname (char *name);
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extern void free_pending_blocks (void);
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/* FIXME: Note that this is used only in buildsym.c and dstread.c,
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which should be fixed to not need direct access to
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record_pending_block. */
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extern void record_pending_block (struct objfile *objfile,
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struct block *block,
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struct pending_block *opblock);
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extern void record_debugformat (char *format);
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extern void record_producer (const char *producer);
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extern void merge_symbol_lists (struct pending **srclist,
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struct pending **targetlist);
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/* The macro table for the compilation unit whose symbols we're
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currently reading. All the symtabs for this CU will point to this. */
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EXTERN struct macro_table *pending_macros;
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#undef EXTERN
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#endif /* defined (BUILDSYM_H) */
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