1999-01-19 Fernando Nasser <fnasser@totem.to.cygnus.com>

[deliverable/binutils-gdb.git] / gdb / buildsym.h

/* Build symbol tables in GDB's internal format.
   Copyright (C) 1986-1996 Free Software Foundation, Inc.

This file is part of GDB.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

#if !defined (BUILDSYM_H)
#define BUILDSYM_H 1

/* This module provides definitions used for creating and adding to
   the symbol table.  These routines are called from various symbol-
   file-reading routines.  

   They originated in dbxread.c of gdb-4.2, and were split out to
   make xcoffread.c more maintainable by sharing code.

   Variables declared in this file can be defined by #define-ing
   the name EXTERN to null.  It is used to declare variables that
   are normally extern, but which get defined in a single module
   using this technique.  */

#ifndef EXTERN
#define	EXTERN extern
#endif

#define HASHSIZE 127	/* Size of things hashed via hashname() */

/* Name of source file whose symbol data we are now processing.
   This comes from a symbol of type N_SO. */

EXTERN char *last_source_file;

/* Core address of start of text of current source file.
   This too comes from the N_SO symbol. */

EXTERN CORE_ADDR last_source_start_addr;

/* The list of sub-source-files within the current individual compilation.
   Each file gets its own symtab with its own linetable and associated info,
   but they all share one blockvector.  */

struct subfile
{
  struct subfile *next;
  char *name;
  char *dirname;
  struct linetable *line_vector;
  int line_vector_length;
  enum language language;
  char *debugformat;
};

EXTERN struct subfile *subfiles;

EXTERN struct subfile *current_subfile;

/* Global variable which, when set, indicates that we are processing a
   .o file compiled with gcc */

EXTERN unsigned char processing_gcc_compilation;

/* When set, we are processing a .o file compiled by sun acc.  This is
   misnamed; it refers to all stabs-in-elf implementations which use
   N_UNDF the way Sun does, including Solaris gcc.  Hopefully all
   stabs-in-elf implementations ever invented will choose to be
   compatible.  */

EXTERN unsigned char processing_acc_compilation;

/* elz: added this flag to know when a block is compiled with HP
   compilers (cc, aCC). This is necessary because of the macro
   COERCE_FLOAT_TO_DOUBLE defined in tm_hppa.h, which causes
   a coercion of float to double to always occur in parameter passing
   for a function called by gdb (see the function value_arg_coerce in 
   valops.c). This is necessary only if the target
   was compiled with gcc, not with HP compilers or with g++ */

EXTERN unsigned char processing_hp_compilation;

/* Count symbols as they are processed, for error messages.  */

EXTERN unsigned int symnum;

/* Record the symbols defined for each context in a list.
   We don't create a struct block for the context until we
   know how long to make it.  */

#define PENDINGSIZE 100

struct pending
{
  struct pending *next;
  int nsyms;
  struct symbol *symbol[PENDINGSIZE];
};

/* Here are the three lists that symbols are put on.  */

EXTERN struct pending *file_symbols;	/* static at top level, and types */

EXTERN struct pending *global_symbols;	/* global functions and variables */

EXTERN struct pending *local_symbols;	/* everything local to lexic context */

EXTERN struct pending *param_symbols;	/* func params local to lexic context */

/* Stack representing unclosed lexical contexts
   (that will become blocks, eventually).  */

struct context_stack
{
  /* Outer locals at the time we entered */

  struct pending *locals;

  /* Pending func params at the time we entered */

  struct pending *params;

  /* Pointer into blocklist as of entry */

  struct pending_block *old_blocks;

  /* Name of function, if any, defining context*/

  struct symbol *name;

  /* PC where this context starts */

  CORE_ADDR start_addr;

  /* Temp slot for exception handling. */

  CORE_ADDR end_addr;

  /* For error-checking matching push/pop */

  int depth;

};

EXTERN struct context_stack *context_stack;

/* Index of first unused entry in context stack.  */

EXTERN int context_stack_depth;

/* Currently allocated size of context stack.  */

EXTERN int context_stack_size;

/* Macro "function" for popping contexts from the stack.  Pushing is done
   by a real function, push_context.  This returns a pointer to a struct
   context_stack.  */

#define	pop_context() (&context_stack[--context_stack_depth]);

/* Nonzero if within a function (so symbols should be local,
   if nothing says specifically).  */

EXTERN int within_function;

/* List of blocks already made (lexical contexts already closed).
   This is used at the end to make the blockvector.  */

struct pending_block
{
  struct pending_block *next;
  struct block *block;
};

/* Pointer to the head of a linked list of symbol blocks which have
   already been finalized (lexical contexts already closed) and which are
   just waiting to be built into a blockvector when finalizing the
   associated symtab. */

EXTERN struct pending_block *pending_blocks;

\f
struct subfile_stack
{
  struct subfile_stack *next;
  char *name;
};

EXTERN struct subfile_stack *subfile_stack;

#define next_symbol_text(objfile) (*next_symbol_text_func)(objfile)

/* Function to invoke get the next symbol.  Return the symbol name. */

EXTERN char *(*next_symbol_text_func) PARAMS ((struct objfile *));

/* Vector of types defined so far, indexed by their type numbers.
   Used for both stabs and coff.
   (In newer sun systems, dbx uses a pair of numbers in parens,
    as in "(SUBFILENUM,NUMWITHINSUBFILE)".  Then these numbers must be
    translated through the type_translations hash table to get
    the index into the type vector.)  */

EXTERN struct type **type_vector;

/* Number of elements allocated for type_vector currently.  */

EXTERN int type_vector_length;

/* Initial size of type vector.  Is realloc'd larger if needed,
   and realloc'd down to the size actually used, when completed.  */

#define	INITIAL_TYPE_VECTOR_LENGTH	160

extern void
add_symbol_to_list PARAMS ((struct symbol *, struct pending **));

extern struct symbol *
find_symbol_in_list PARAMS ((struct pending *, char *, int));

extern void
finish_block PARAMS ((struct symbol *, struct pending **,
		      struct pending_block *, CORE_ADDR, CORE_ADDR,
		      struct objfile *));

extern void
really_free_pendings PARAMS ((int foo));

extern void
start_subfile PARAMS ((char *, char *));

extern void
patch_subfile_names PARAMS ((struct subfile *subfile, char *name));

extern void
push_subfile PARAMS ((void));

extern char *
pop_subfile PARAMS ((void));

extern struct symtab *
end_symtab PARAMS ((CORE_ADDR, struct objfile *, int));

extern void
scan_file_globals PARAMS ((struct objfile *));

extern void
buildsym_new_init PARAMS ((void));

extern void
buildsym_init PARAMS ((void));

extern struct context_stack *
push_context PARAMS ((int, CORE_ADDR));

extern void
record_line PARAMS ((struct subfile *, int, CORE_ADDR));

extern void
start_symtab PARAMS ((char *, char *, CORE_ADDR));

extern int
hashname PARAMS ((char *));

extern void
free_pending_blocks PARAMS ((void));

/* FIXME: Note that this is used only in buildsym.c and dstread.c,
   which should be fixed to not need direct access to make_blockvector. */

extern struct blockvector *
make_blockvector PARAMS ((struct objfile *));

/* FIXME: Note that this is used only in buildsym.c and dstread.c,
   which should be fixed to not need direct access to record_pending_block. */

extern void
record_pending_block PARAMS ((struct objfile *, struct block *,
			      struct pending_block *));

extern void
record_debugformat PARAMS ((char *));

extern void
merge_symbol_lists PARAMS ((struct pending **, struct pending **));

#undef EXTERN

#endif	/* defined (BUILDSYM_H) */