b1027aa458
a location whose address has to be resolved via the minimal symbol table. * buildsym.c (finish_block), findvar.c (symbol_read_needs_frame, read_var_value), printcmd.c (address_info), symmisc.c (print_symbol, print_partial_symbol): Handle LOC_UNRESOLVED. * stabsread.c (scan_file_globals): Change unresolved LOC_STATIC symbols to LOC_UNRESOLVED. Remove rt_common_objfile lookup kludge, global common symbols are now handled by LOC_UNRESOLVED. (scan_file_globals_1): Move code back to scan_file_globals, delete.
1045 lines
29 KiB
C
1045 lines
29 KiB
C
/* Support routines for building symbol tables in GDB's internal format.
|
||
Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1995
|
||
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. */
|
||
|
||
/* This module provides subroutines used for creating and adding to
|
||
the symbol table. These routines are called from various symbol-
|
||
file-reading routines.
|
||
|
||
Routines to support specific debugging information formats (stabs,
|
||
DWARF, etc) belong somewhere else. */
|
||
|
||
#include "defs.h"
|
||
#include "bfd.h"
|
||
#include "obstack.h"
|
||
#include "symtab.h"
|
||
#include "symfile.h" /* Needed for "struct complaint" */
|
||
#include "objfiles.h"
|
||
#include "gdbtypes.h"
|
||
#include "complaints.h"
|
||
#include "gdb_string.h"
|
||
|
||
/* Ask buildsym.h to define the vars it normally declares `extern'. */
|
||
#define EXTERN /**/
|
||
#include "buildsym.h" /* Our own declarations */
|
||
#undef EXTERN
|
||
|
||
/* For cleanup_undefined_types and finish_global_stabs (somewhat
|
||
questionable--see comment where we call them). */
|
||
#include "stabsread.h"
|
||
|
||
static int
|
||
compare_line_numbers PARAMS ((const void *, const void *));
|
||
|
||
static struct blockvector *
|
||
make_blockvector PARAMS ((struct objfile *));
|
||
|
||
|
||
/* Initial sizes of data structures. These are realloc'd larger if needed,
|
||
and realloc'd down to the size actually used, when completed. */
|
||
|
||
#define INITIAL_CONTEXT_STACK_SIZE 10
|
||
#define INITIAL_LINE_VECTOR_LENGTH 1000
|
||
|
||
|
||
/* Complaints about the symbols we have encountered. */
|
||
|
||
struct complaint innerblock_complaint =
|
||
{"inner block not inside outer block in %s", 0, 0};
|
||
|
||
struct complaint innerblock_anon_complaint =
|
||
{"inner block not inside outer block", 0, 0};
|
||
|
||
struct complaint blockvector_complaint =
|
||
{"block at 0x%lx out of order", 0, 0};
|
||
|
||
|
||
/* maintain the lists of symbols and blocks */
|
||
|
||
/* Add a symbol to one of the lists of symbols. */
|
||
|
||
void
|
||
add_symbol_to_list (symbol, listhead)
|
||
struct symbol *symbol;
|
||
struct pending **listhead;
|
||
{
|
||
register struct pending *link;
|
||
|
||
/* We keep PENDINGSIZE symbols in each link of the list.
|
||
If we don't have a link with room in it, add a new link. */
|
||
if (*listhead == NULL || (*listhead)->nsyms == PENDINGSIZE)
|
||
{
|
||
if (free_pendings)
|
||
{
|
||
link = free_pendings;
|
||
free_pendings = link->next;
|
||
}
|
||
else
|
||
{
|
||
link = (struct pending *) xmalloc (sizeof (struct pending));
|
||
}
|
||
|
||
link->next = *listhead;
|
||
*listhead = link;
|
||
link->nsyms = 0;
|
||
}
|
||
|
||
(*listhead)->symbol[(*listhead)->nsyms++] = symbol;
|
||
}
|
||
|
||
/* Find a symbol named NAME on a LIST. NAME need not be '\0'-terminated;
|
||
LENGTH is the length of the name. */
|
||
|
||
struct symbol *
|
||
find_symbol_in_list (list, name, length)
|
||
struct pending *list;
|
||
char *name;
|
||
int length;
|
||
{
|
||
int j;
|
||
char *pp;
|
||
|
||
while (list != NULL)
|
||
{
|
||
for (j = list->nsyms; --j >= 0; )
|
||
{
|
||
pp = SYMBOL_NAME (list->symbol[j]);
|
||
if (*pp == *name && strncmp (pp, name, length) == 0 &&
|
||
pp[length] == '\0')
|
||
{
|
||
return (list->symbol[j]);
|
||
}
|
||
}
|
||
list = list->next;
|
||
}
|
||
return (NULL);
|
||
}
|
||
|
||
/* At end of reading syms, or in case of quit,
|
||
really free as many `struct pending's as we can easily find. */
|
||
|
||
/* ARGSUSED */
|
||
void
|
||
really_free_pendings (foo)
|
||
int foo;
|
||
{
|
||
struct pending *next, *next1;
|
||
#if 0
|
||
struct pending_block *bnext, *bnext1;
|
||
#endif
|
||
|
||
for (next = free_pendings; next; next = next1)
|
||
{
|
||
next1 = next->next;
|
||
free ((PTR)next);
|
||
}
|
||
free_pendings = NULL;
|
||
|
||
#if 0 /* Now we make the links in the symbol_obstack, so don't free them. */
|
||
for (bnext = pending_blocks; bnext; bnext = bnext1)
|
||
{
|
||
bnext1 = bnext->next;
|
||
free ((PTR)bnext);
|
||
}
|
||
#endif
|
||
pending_blocks = NULL;
|
||
|
||
for (next = file_symbols; next != NULL; next = next1)
|
||
{
|
||
next1 = next->next;
|
||
free ((PTR)next);
|
||
}
|
||
file_symbols = NULL;
|
||
|
||
for (next = global_symbols; next != NULL; next = next1)
|
||
{
|
||
next1 = next->next;
|
||
free ((PTR)next);
|
||
}
|
||
global_symbols = NULL;
|
||
}
|
||
|
||
/* Take one of the lists of symbols and make a block from it.
|
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Keep the order the symbols have in the list (reversed from the input file).
|
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Put the block on the list of pending blocks. */
|
||
|
||
void
|
||
finish_block (symbol, listhead, old_blocks, start, end, objfile)
|
||
struct symbol *symbol;
|
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struct pending **listhead;
|
||
struct pending_block *old_blocks;
|
||
CORE_ADDR start, end;
|
||
struct objfile *objfile;
|
||
{
|
||
register struct pending *next, *next1;
|
||
register struct block *block;
|
||
register struct pending_block *pblock;
|
||
struct pending_block *opblock;
|
||
register int i;
|
||
register int j;
|
||
|
||
/* Count the length of the list of symbols. */
|
||
|
||
for (next = *listhead, i = 0;
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next;
|
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i += next->nsyms, next = next->next)
|
||
{
|
||
/*EMPTY*/;
|
||
}
|
||
|
||
block = (struct block *) obstack_alloc (&objfile -> symbol_obstack,
|
||
(sizeof (struct block) + ((i - 1) * sizeof (struct symbol *))));
|
||
|
||
/* Copy the symbols into the block. */
|
||
|
||
BLOCK_NSYMS (block) = i;
|
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for (next = *listhead; next; next = next->next)
|
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{
|
||
for (j = next->nsyms - 1; j >= 0; j--)
|
||
{
|
||
BLOCK_SYM (block, --i) = next->symbol[j];
|
||
}
|
||
}
|
||
|
||
BLOCK_START (block) = start;
|
||
BLOCK_END (block) = end;
|
||
/* Superblock filled in when containing block is made */
|
||
BLOCK_SUPERBLOCK (block) = NULL;
|
||
BLOCK_GCC_COMPILED (block) = processing_gcc_compilation;
|
||
|
||
/* Put the block in as the value of the symbol that names it. */
|
||
|
||
if (symbol)
|
||
{
|
||
struct type *ftype = SYMBOL_TYPE (symbol);
|
||
SYMBOL_BLOCK_VALUE (symbol) = block;
|
||
BLOCK_FUNCTION (block) = symbol;
|
||
|
||
if (TYPE_NFIELDS (ftype) <= 0)
|
||
{
|
||
/* No parameter type information is recorded with the function's
|
||
type. Set that from the type of the parameter symbols. */
|
||
int nparams = 0, iparams;
|
||
struct symbol *sym;
|
||
for (i = 0; i < BLOCK_NSYMS (block); i++)
|
||
{
|
||
sym = BLOCK_SYM (block, i);
|
||
switch (SYMBOL_CLASS (sym))
|
||
{
|
||
case LOC_ARG:
|
||
case LOC_REF_ARG:
|
||
case LOC_REGPARM:
|
||
case LOC_REGPARM_ADDR:
|
||
nparams++;
|
||
break;
|
||
case LOC_UNDEF:
|
||
case LOC_CONST:
|
||
case LOC_STATIC:
|
||
case LOC_REGISTER:
|
||
case LOC_LOCAL:
|
||
case LOC_TYPEDEF:
|
||
case LOC_LABEL:
|
||
case LOC_BLOCK:
|
||
case LOC_CONST_BYTES:
|
||
case LOC_LOCAL_ARG:
|
||
case LOC_BASEREG:
|
||
case LOC_BASEREG_ARG:
|
||
case LOC_UNRESOLVED:
|
||
case LOC_OPTIMIZED_OUT:
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
if (nparams > 0)
|
||
{
|
||
TYPE_NFIELDS (ftype) = nparams;
|
||
TYPE_FIELDS (ftype) = (struct field *)
|
||
TYPE_ALLOC (ftype, nparams * sizeof (struct field));
|
||
|
||
for (i = iparams = 0; iparams < nparams; i++)
|
||
{
|
||
sym = BLOCK_SYM (block, i);
|
||
switch (SYMBOL_CLASS (sym))
|
||
{
|
||
case LOC_ARG:
|
||
case LOC_REF_ARG:
|
||
case LOC_REGPARM:
|
||
case LOC_REGPARM_ADDR:
|
||
TYPE_FIELD_TYPE (ftype, iparams) = SYMBOL_TYPE (sym);
|
||
iparams++;
|
||
break;
|
||
case LOC_UNDEF:
|
||
case LOC_CONST:
|
||
case LOC_STATIC:
|
||
case LOC_REGISTER:
|
||
case LOC_LOCAL:
|
||
case LOC_TYPEDEF:
|
||
case LOC_LABEL:
|
||
case LOC_BLOCK:
|
||
case LOC_CONST_BYTES:
|
||
case LOC_LOCAL_ARG:
|
||
case LOC_BASEREG:
|
||
case LOC_BASEREG_ARG:
|
||
case LOC_UNRESOLVED:
|
||
case LOC_OPTIMIZED_OUT:
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
else
|
||
{
|
||
BLOCK_FUNCTION (block) = NULL;
|
||
}
|
||
|
||
/* Now "free" the links of the list, and empty the list. */
|
||
|
||
for (next = *listhead; next; next = next1)
|
||
{
|
||
next1 = next->next;
|
||
next->next = free_pendings;
|
||
free_pendings = next;
|
||
}
|
||
*listhead = NULL;
|
||
|
||
/* Install this block as the superblock
|
||
of all blocks made since the start of this scope
|
||
that don't have superblocks yet. */
|
||
|
||
opblock = NULL;
|
||
for (pblock = pending_blocks; pblock != old_blocks; pblock = pblock->next)
|
||
{
|
||
if (BLOCK_SUPERBLOCK (pblock->block) == NULL)
|
||
{
|
||
#if 1
|
||
/* Check to be sure the blocks are nested as we receive them.
|
||
If the compiler/assembler/linker work, this just burns a small
|
||
amount of time. */
|
||
if (BLOCK_START (pblock->block) < BLOCK_START (block) ||
|
||
BLOCK_END (pblock->block) > BLOCK_END (block))
|
||
{
|
||
if (symbol)
|
||
{
|
||
complain (&innerblock_complaint,
|
||
SYMBOL_SOURCE_NAME (symbol));
|
||
}
|
||
else
|
||
{
|
||
complain (&innerblock_anon_complaint);
|
||
}
|
||
BLOCK_START (pblock->block) = BLOCK_START (block);
|
||
BLOCK_END (pblock->block) = BLOCK_END (block);
|
||
}
|
||
#endif
|
||
BLOCK_SUPERBLOCK (pblock->block) = block;
|
||
}
|
||
opblock = pblock;
|
||
}
|
||
|
||
/* Record this block on the list of all blocks in the file.
|
||
Put it after opblock, or at the beginning if opblock is 0.
|
||
This puts the block in the list after all its subblocks. */
|
||
|
||
/* Allocate in the symbol_obstack to save time.
|
||
It wastes a little space. */
|
||
pblock = (struct pending_block *)
|
||
obstack_alloc (&objfile -> symbol_obstack,
|
||
sizeof (struct pending_block));
|
||
pblock->block = block;
|
||
if (opblock)
|
||
{
|
||
pblock->next = opblock->next;
|
||
opblock->next = pblock;
|
||
}
|
||
else
|
||
{
|
||
pblock->next = pending_blocks;
|
||
pending_blocks = pblock;
|
||
}
|
||
}
|
||
|
||
static struct blockvector *
|
||
make_blockvector (objfile)
|
||
struct objfile *objfile;
|
||
{
|
||
register struct pending_block *next;
|
||
register struct blockvector *blockvector;
|
||
register int i;
|
||
|
||
/* Count the length of the list of blocks. */
|
||
|
||
for (next = pending_blocks, i = 0; next; next = next->next, i++) {;}
|
||
|
||
blockvector = (struct blockvector *)
|
||
obstack_alloc (&objfile -> symbol_obstack,
|
||
(sizeof (struct blockvector)
|
||
+ (i - 1) * sizeof (struct block *)));
|
||
|
||
/* Copy the blocks into the blockvector.
|
||
This is done in reverse order, which happens to put
|
||
the blocks into the proper order (ascending starting address).
|
||
finish_block has hair to insert each block into the list
|
||
after its subblocks in order to make sure this is true. */
|
||
|
||
BLOCKVECTOR_NBLOCKS (blockvector) = i;
|
||
for (next = pending_blocks; next; next = next->next)
|
||
{
|
||
BLOCKVECTOR_BLOCK (blockvector, --i) = next->block;
|
||
}
|
||
|
||
#if 0 /* Now we make the links in the obstack, so don't free them. */
|
||
/* Now free the links of the list, and empty the list. */
|
||
|
||
for (next = pending_blocks; next; next = next1)
|
||
{
|
||
next1 = next->next;
|
||
free (next);
|
||
}
|
||
#endif
|
||
pending_blocks = NULL;
|
||
|
||
#if 1 /* FIXME, shut this off after a while to speed up symbol reading. */
|
||
/* Some compilers output blocks in the wrong order, but we depend
|
||
on their being in the right order so we can binary search.
|
||
Check the order and moan about it. FIXME. */
|
||
if (BLOCKVECTOR_NBLOCKS (blockvector) > 1)
|
||
{
|
||
for (i = 1; i < BLOCKVECTOR_NBLOCKS (blockvector); i++)
|
||
{
|
||
if (BLOCK_START(BLOCKVECTOR_BLOCK (blockvector, i-1))
|
||
> BLOCK_START(BLOCKVECTOR_BLOCK (blockvector, i)))
|
||
{
|
||
|
||
/* FIXME-32x64: loses if CORE_ADDR doesn't fit in a
|
||
long. Possible solutions include a version of
|
||
complain which takes a callback, a
|
||
sprintf_address_numeric to match
|
||
print_address_numeric, or a way to set up a GDB_FILE
|
||
* which causes sprintf rather than fprintf to be
|
||
called. */
|
||
|
||
complain (&blockvector_complaint,
|
||
(unsigned long) BLOCK_START(BLOCKVECTOR_BLOCK (blockvector, i)));
|
||
}
|
||
}
|
||
}
|
||
#endif
|
||
|
||
return (blockvector);
|
||
}
|
||
|
||
|
||
/* Start recording information about source code that came from an included
|
||
(or otherwise merged-in) source file with a different name. NAME is
|
||
the name of the file (cannot be NULL), DIRNAME is the directory in which
|
||
it resides (or NULL if not known). */
|
||
|
||
void
|
||
start_subfile (name, dirname)
|
||
char *name;
|
||
char *dirname;
|
||
{
|
||
register struct subfile *subfile;
|
||
|
||
/* See if this subfile is already known as a subfile of the
|
||
current main source file. */
|
||
|
||
for (subfile = subfiles; subfile; subfile = subfile->next)
|
||
{
|
||
if (STREQ (subfile->name, name))
|
||
{
|
||
current_subfile = subfile;
|
||
return;
|
||
}
|
||
}
|
||
|
||
/* This subfile is not known. Add an entry for it.
|
||
Make an entry for this subfile in the list of all subfiles
|
||
of the current main source file. */
|
||
|
||
subfile = (struct subfile *) xmalloc (sizeof (struct subfile));
|
||
subfile->next = subfiles;
|
||
subfiles = subfile;
|
||
current_subfile = subfile;
|
||
|
||
/* Save its name and compilation directory name */
|
||
subfile->name = (name == NULL) ? NULL : savestring (name, strlen (name));
|
||
subfile->dirname =
|
||
(dirname == NULL) ? NULL : savestring (dirname, strlen (dirname));
|
||
|
||
/* Initialize line-number recording for this subfile. */
|
||
subfile->line_vector = NULL;
|
||
|
||
/* Default the source language to whatever can be deduced from
|
||
the filename. If nothing can be deduced (such as for a C/C++
|
||
include file with a ".h" extension), then inherit whatever
|
||
language the previous subfile had. This kludgery is necessary
|
||
because there is no standard way in some object formats to
|
||
record the source language. Also, when symtabs are allocated
|
||
we try to deduce a language then as well, but it is too late
|
||
for us to use that information while reading symbols, since
|
||
symtabs aren't allocated until after all the symbols have
|
||
been processed for a given source file. */
|
||
|
||
subfile->language = deduce_language_from_filename (subfile->name);
|
||
if (subfile->language == language_unknown &&
|
||
subfile->next != NULL)
|
||
{
|
||
subfile->language = subfile->next->language;
|
||
}
|
||
|
||
/* cfront output is a C program, so in most ways it looks like a C
|
||
program. But to demangle we need to set the language to C++. We
|
||
can distinguish cfront code by the fact that it has #line
|
||
directives which specify a file name ending in .C.
|
||
|
||
So if the filename of this subfile ends in .C, then change the language
|
||
of any pending subfiles from C to C++. We also accept any other C++
|
||
suffixes accepted by deduce_language_from_filename (in particular,
|
||
some people use .cxx with cfront). */
|
||
/* Likewise for f2c. */
|
||
|
||
if (subfile->name)
|
||
{
|
||
struct subfile *s;
|
||
enum language sublang = deduce_language_from_filename (subfile->name);
|
||
|
||
if (sublang == language_cplus || sublang == language_fortran)
|
||
for (s = subfiles; s != NULL; s = s->next)
|
||
if (s->language == language_c)
|
||
s->language = sublang;
|
||
}
|
||
|
||
/* And patch up this file if necessary. */
|
||
if (subfile->language == language_c
|
||
&& subfile->next != NULL
|
||
&& (subfile->next->language == language_cplus
|
||
|| subfile->next->language == language_fortran))
|
||
{
|
||
subfile->language = subfile->next->language;
|
||
}
|
||
}
|
||
|
||
/* For stabs readers, the first N_SO symbol is assumed to be the source
|
||
file name, and the subfile struct is initialized using that assumption.
|
||
If another N_SO symbol is later seen, immediately following the first
|
||
one, then the first one is assumed to be the directory name and the
|
||
second one is really the source file name.
|
||
|
||
So we have to patch up the subfile struct by moving the old name value to
|
||
dirname and remembering the new name. Some sanity checking is performed
|
||
to ensure that the state of the subfile struct is reasonable and that the
|
||
old name we are assuming to be a directory name actually is (by checking
|
||
for a trailing '/'). */
|
||
|
||
void
|
||
patch_subfile_names (subfile, name)
|
||
struct subfile *subfile;
|
||
char *name;
|
||
{
|
||
if (subfile != NULL && subfile->dirname == NULL && subfile->name != NULL
|
||
&& subfile->name[strlen(subfile->name)-1] == '/')
|
||
{
|
||
subfile->dirname = subfile->name;
|
||
subfile->name = savestring (name, strlen (name));
|
||
last_source_file = name;
|
||
|
||
/* Default the source language to whatever can be deduced from
|
||
the filename. If nothing can be deduced (such as for a C/C++
|
||
include file with a ".h" extension), then inherit whatever
|
||
language the previous subfile had. This kludgery is necessary
|
||
because there is no standard way in some object formats to
|
||
record the source language. Also, when symtabs are allocated
|
||
we try to deduce a language then as well, but it is too late
|
||
for us to use that information while reading symbols, since
|
||
symtabs aren't allocated until after all the symbols have
|
||
been processed for a given source file. */
|
||
|
||
subfile->language = deduce_language_from_filename (subfile->name);
|
||
if (subfile->language == language_unknown &&
|
||
subfile->next != NULL)
|
||
{
|
||
subfile->language = subfile->next->language;
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
/* Handle the N_BINCL and N_EINCL symbol types
|
||
that act like N_SOL for switching source files
|
||
(different subfiles, as we call them) within one object file,
|
||
but using a stack rather than in an arbitrary order. */
|
||
|
||
void
|
||
push_subfile ()
|
||
{
|
||
register struct subfile_stack *tem
|
||
= (struct subfile_stack *) xmalloc (sizeof (struct subfile_stack));
|
||
|
||
tem->next = subfile_stack;
|
||
subfile_stack = tem;
|
||
if (current_subfile == NULL || current_subfile->name == NULL)
|
||
{
|
||
abort ();
|
||
}
|
||
tem->name = current_subfile->name;
|
||
}
|
||
|
||
char *
|
||
pop_subfile ()
|
||
{
|
||
register char *name;
|
||
register struct subfile_stack *link = subfile_stack;
|
||
|
||
if (link == NULL)
|
||
{
|
||
abort ();
|
||
}
|
||
name = link->name;
|
||
subfile_stack = link->next;
|
||
free ((PTR)link);
|
||
return (name);
|
||
}
|
||
|
||
|
||
/* Add a linetable entry for line number LINE and address PC to the line
|
||
vector for SUBFILE. */
|
||
|
||
void
|
||
record_line (subfile, line, pc)
|
||
register struct subfile *subfile;
|
||
int line;
|
||
CORE_ADDR pc;
|
||
{
|
||
struct linetable_entry *e;
|
||
/* Ignore the dummy line number in libg.o */
|
||
|
||
if (line == 0xffff)
|
||
{
|
||
return;
|
||
}
|
||
|
||
/* Make sure line vector exists and is big enough. */
|
||
if (!subfile->line_vector)
|
||
{
|
||
subfile->line_vector_length = INITIAL_LINE_VECTOR_LENGTH;
|
||
subfile->line_vector = (struct linetable *)
|
||
xmalloc (sizeof (struct linetable)
|
||
+ subfile->line_vector_length * sizeof (struct linetable_entry));
|
||
subfile->line_vector->nitems = 0;
|
||
}
|
||
|
||
if (subfile->line_vector->nitems + 1 >= subfile->line_vector_length)
|
||
{
|
||
subfile->line_vector_length *= 2;
|
||
subfile->line_vector = (struct linetable *)
|
||
xrealloc ((char *) subfile->line_vector, (sizeof (struct linetable)
|
||
+ subfile->line_vector_length * sizeof (struct linetable_entry)));
|
||
}
|
||
|
||
e = subfile->line_vector->item + subfile->line_vector->nitems++;
|
||
e->line = line; e->pc = pc;
|
||
}
|
||
|
||
|
||
/* Needed in order to sort line tables from IBM xcoff files. Sigh! */
|
||
|
||
static int
|
||
compare_line_numbers (ln1p, ln2p)
|
||
const PTR ln1p;
|
||
const PTR ln2p;
|
||
{
|
||
struct linetable_entry *ln1 = (struct linetable_entry *) ln1p;
|
||
struct linetable_entry *ln2 = (struct linetable_entry *) ln2p;
|
||
|
||
/* Note: this code does not assume that CORE_ADDRs can fit in ints.
|
||
Please keep it that way. */
|
||
if (ln1->pc < ln2->pc)
|
||
return -1;
|
||
|
||
if (ln1->pc > ln2->pc)
|
||
return 1;
|
||
|
||
/* If pc equal, sort by line. I'm not sure whether this is optimum
|
||
behavior (see comment at struct linetable in symtab.h). */
|
||
return ln1->line - ln2->line;
|
||
}
|
||
|
||
|
||
/* Start a new symtab for a new source file.
|
||
Called, for example, when a stabs symbol of type N_SO is seen, or when
|
||
a DWARF TAG_compile_unit DIE is seen.
|
||
It indicates the start of data for one original source file. */
|
||
|
||
void
|
||
start_symtab (name, dirname, start_addr)
|
||
char *name;
|
||
char *dirname;
|
||
CORE_ADDR start_addr;
|
||
{
|
||
|
||
last_source_file = name;
|
||
last_source_start_addr = start_addr;
|
||
file_symbols = NULL;
|
||
global_symbols = NULL;
|
||
within_function = 0;
|
||
|
||
/* Context stack is initially empty. Allocate first one with room for
|
||
10 levels; reuse it forever afterward. */
|
||
if (context_stack == NULL)
|
||
{
|
||
context_stack_size = INITIAL_CONTEXT_STACK_SIZE;
|
||
context_stack = (struct context_stack *)
|
||
xmalloc (context_stack_size * sizeof (struct context_stack));
|
||
}
|
||
context_stack_depth = 0;
|
||
|
||
/* Initialize the list of sub source files with one entry
|
||
for this file (the top-level source file). */
|
||
|
||
subfiles = NULL;
|
||
current_subfile = NULL;
|
||
start_subfile (name, dirname);
|
||
}
|
||
|
||
/* Finish the symbol definitions for one main source file,
|
||
close off all the lexical contexts for that file
|
||
(creating struct block's for them), then make the struct symtab
|
||
for that file and put it in the list of all such.
|
||
|
||
END_ADDR is the address of the end of the file's text.
|
||
SECTION is the section number (in objfile->section_offsets) of
|
||
the blockvector and linetable.
|
||
|
||
Note that it is possible for end_symtab() to return NULL. In particular,
|
||
for the DWARF case at least, it will return NULL when it finds a
|
||
compilation unit that has exactly one DIE, a TAG_compile_unit DIE. This
|
||
can happen when we link in an object file that was compiled from an empty
|
||
source file. Returning NULL is probably not the correct thing to do,
|
||
because then gdb will never know about this empty file (FIXME). */
|
||
|
||
struct symtab *
|
||
end_symtab (end_addr, sort_pending, sort_linevec, objfile, section)
|
||
CORE_ADDR end_addr;
|
||
int sort_pending;
|
||
int sort_linevec;
|
||
struct objfile *objfile;
|
||
int section;
|
||
{
|
||
register struct symtab *symtab = NULL;
|
||
register struct blockvector *blockvector;
|
||
register struct subfile *subfile;
|
||
register struct context_stack *cstk;
|
||
struct subfile *nextsub;
|
||
|
||
/* Finish the lexical context of the last function in the file;
|
||
pop the context stack. */
|
||
|
||
if (context_stack_depth > 0)
|
||
{
|
||
context_stack_depth--;
|
||
cstk = &context_stack[context_stack_depth];
|
||
/* Make a block for the local symbols within. */
|
||
finish_block (cstk->name, &local_symbols, cstk->old_blocks,
|
||
cstk->start_addr, end_addr, objfile);
|
||
|
||
if (context_stack_depth > 0)
|
||
{
|
||
/* This is said to happen with SCO. The old coffread.c code
|
||
simply emptied the context stack, so we do the same. FIXME:
|
||
Find out why it is happening. This is not believed to happen
|
||
in most cases (even for coffread.c); it used to be an abort(). */
|
||
static struct complaint msg =
|
||
{"Context stack not empty in end_symtab", 0, 0};
|
||
complain (&msg);
|
||
context_stack_depth = 0;
|
||
}
|
||
}
|
||
|
||
/* It is unfortunate that in xcoff, pending blocks might not be ordered
|
||
in this stage. Especially, blocks for static functions will show up at
|
||
the end. We need to sort them, so tools like `find_pc_function' and
|
||
`find_pc_block' can work reliably. */
|
||
|
||
if (sort_pending && pending_blocks)
|
||
{
|
||
/* FIXME! Remove this horrid bubble sort and use qsort!!! */
|
||
int swapped;
|
||
do
|
||
{
|
||
struct pending_block *pb, *pbnext;
|
||
|
||
pb = pending_blocks;
|
||
pbnext = pb->next;
|
||
swapped = 0;
|
||
|
||
while (pbnext)
|
||
{
|
||
/* swap blocks if unordered! */
|
||
|
||
if (BLOCK_START(pb->block) < BLOCK_START(pbnext->block))
|
||
{
|
||
struct block *tmp = pb->block;
|
||
pb->block = pbnext->block;
|
||
pbnext->block = tmp;
|
||
swapped = 1;
|
||
}
|
||
pb = pbnext;
|
||
pbnext = pbnext->next;
|
||
}
|
||
} while (swapped);
|
||
}
|
||
|
||
/* Cleanup any undefined types that have been left hanging around
|
||
(this needs to be done before the finish_blocks so that
|
||
file_symbols is still good).
|
||
|
||
Both cleanup_undefined_types and finish_global_stabs are stabs
|
||
specific, but harmless for other symbol readers, since on gdb
|
||
startup or when finished reading stabs, the state is set so these
|
||
are no-ops. FIXME: Is this handled right in case of QUIT? Can
|
||
we make this cleaner? */
|
||
|
||
cleanup_undefined_types ();
|
||
finish_global_stabs (objfile);
|
||
|
||
if (pending_blocks == NULL
|
||
&& file_symbols == NULL
|
||
&& global_symbols == NULL)
|
||
{
|
||
/* Ignore symtabs that have no functions with real debugging info */
|
||
blockvector = NULL;
|
||
}
|
||
else
|
||
{
|
||
/* Define the STATIC_BLOCK & GLOBAL_BLOCK, and build the blockvector. */
|
||
finish_block (0, &file_symbols, 0, last_source_start_addr, end_addr,
|
||
objfile);
|
||
finish_block (0, &global_symbols, 0, last_source_start_addr, end_addr,
|
||
objfile);
|
||
blockvector = make_blockvector (objfile);
|
||
}
|
||
|
||
#ifdef PROCESS_LINENUMBER_HOOK
|
||
PROCESS_LINENUMBER_HOOK (); /* Needed for xcoff. */
|
||
#endif
|
||
|
||
/* Now create the symtab objects proper, one for each subfile. */
|
||
/* (The main file is the last one on the chain.) */
|
||
|
||
for (subfile = subfiles; subfile; subfile = nextsub)
|
||
{
|
||
int linetablesize = 0;
|
||
/* If we have blocks of symbols, make a symtab.
|
||
Otherwise, just ignore this file and any line number info in it. */
|
||
symtab = NULL;
|
||
if (blockvector)
|
||
{
|
||
if (subfile->line_vector)
|
||
{
|
||
linetablesize = sizeof (struct linetable) +
|
||
subfile->line_vector->nitems * sizeof (struct linetable_entry);
|
||
#if 0
|
||
/* I think this is artifact from before it went on the obstack.
|
||
I doubt we'll need the memory between now and when we
|
||
free it later in this function. */
|
||
/* First, shrink the linetable to make more memory. */
|
||
subfile->line_vector = (struct linetable *)
|
||
xrealloc ((char *) subfile->line_vector, linetablesize);
|
||
#endif
|
||
/* If sort_linevec is false, we might want just check to make
|
||
sure they are sorted and complain() if not, as a way of
|
||
tracking down compilers/symbol readers which don't get
|
||
them sorted right. */
|
||
|
||
if (sort_linevec)
|
||
qsort (subfile->line_vector->item,
|
||
subfile->line_vector->nitems,
|
||
sizeof (struct linetable_entry), compare_line_numbers);
|
||
}
|
||
|
||
/* Now, allocate a symbol table. */
|
||
symtab = allocate_symtab (subfile->name, objfile);
|
||
|
||
/* Fill in its components. */
|
||
symtab->blockvector = blockvector;
|
||
if (subfile->line_vector)
|
||
{
|
||
/* Reallocate the line table on the symbol obstack */
|
||
symtab->linetable = (struct linetable *)
|
||
obstack_alloc (&objfile -> symbol_obstack, linetablesize);
|
||
memcpy (symtab->linetable, subfile->line_vector, linetablesize);
|
||
}
|
||
else
|
||
{
|
||
symtab->linetable = NULL;
|
||
}
|
||
symtab->block_line_section = section;
|
||
if (subfile->dirname)
|
||
{
|
||
/* Reallocate the dirname on the symbol obstack */
|
||
symtab->dirname = (char *)
|
||
obstack_alloc (&objfile -> symbol_obstack,
|
||
strlen (subfile -> dirname) + 1);
|
||
strcpy (symtab->dirname, subfile->dirname);
|
||
}
|
||
else
|
||
{
|
||
symtab->dirname = NULL;
|
||
}
|
||
symtab->free_code = free_linetable;
|
||
symtab->free_ptr = NULL;
|
||
|
||
/* Use whatever language we have been using for this subfile,
|
||
not the one that was deduced in allocate_symtab from the
|
||
filename. We already did our own deducing when we created
|
||
the subfile, and we may have altered our opinion of what
|
||
language it is from things we found in the symbols. */
|
||
symtab->language = subfile->language;
|
||
|
||
/* All symtabs for the main file and the subfiles share a
|
||
blockvector, so we need to clear primary for everything but
|
||
the main file. */
|
||
|
||
symtab->primary = 0;
|
||
}
|
||
if (subfile->name != NULL)
|
||
{
|
||
free ((PTR) subfile->name);
|
||
}
|
||
if (subfile->dirname != NULL)
|
||
{
|
||
free ((PTR) subfile->dirname);
|
||
}
|
||
if (subfile->line_vector != NULL)
|
||
{
|
||
free ((PTR) subfile->line_vector);
|
||
}
|
||
|
||
nextsub = subfile->next;
|
||
free ((PTR)subfile);
|
||
}
|
||
|
||
/* Set this for the main source file. */
|
||
if (symtab)
|
||
{
|
||
symtab->primary = 1;
|
||
}
|
||
|
||
last_source_file = NULL;
|
||
current_subfile = NULL;
|
||
|
||
return (symtab);
|
||
}
|
||
|
||
|
||
/* Push a context block. Args are an identifying nesting level (checkable
|
||
when you pop it), and the starting PC address of this context. */
|
||
|
||
struct context_stack *
|
||
push_context (desc, valu)
|
||
int desc;
|
||
CORE_ADDR valu;
|
||
{
|
||
register struct context_stack *new;
|
||
|
||
if (context_stack_depth == context_stack_size)
|
||
{
|
||
context_stack_size *= 2;
|
||
context_stack = (struct context_stack *)
|
||
xrealloc ((char *) context_stack,
|
||
(context_stack_size * sizeof (struct context_stack)));
|
||
}
|
||
|
||
new = &context_stack[context_stack_depth++];
|
||
new->depth = desc;
|
||
new->locals = local_symbols;
|
||
new->old_blocks = pending_blocks;
|
||
new->start_addr = valu;
|
||
new->name = NULL;
|
||
|
||
local_symbols = NULL;
|
||
|
||
return (new);
|
||
}
|
||
|
||
|
||
/* Compute a small integer hash code for the given name. */
|
||
|
||
int
|
||
hashname (name)
|
||
char *name;
|
||
{
|
||
register char *p = name;
|
||
register int total = p[0];
|
||
register int c;
|
||
|
||
c = p[1];
|
||
total += c << 2;
|
||
if (c)
|
||
{
|
||
c = p[2];
|
||
total += c << 4;
|
||
if (c)
|
||
{
|
||
total += p[3] << 6;
|
||
}
|
||
}
|
||
|
||
/* Ensure result is positive. */
|
||
if (total < 0)
|
||
{
|
||
total += (1000 << 6);
|
||
}
|
||
return (total % HASHSIZE);
|
||
}
|
||
|
||
|
||
/* Initialize anything that needs initializing when starting to read
|
||
a fresh piece of a symbol file, e.g. reading in the stuff corresponding
|
||
to a psymtab. */
|
||
|
||
void
|
||
buildsym_init ()
|
||
{
|
||
free_pendings = NULL;
|
||
file_symbols = NULL;
|
||
global_symbols = NULL;
|
||
pending_blocks = NULL;
|
||
}
|
||
|
||
/* Initialize anything that needs initializing when a completely new
|
||
symbol file is specified (not just adding some symbols from another
|
||
file, e.g. a shared library). */
|
||
|
||
void
|
||
buildsym_new_init ()
|
||
{
|
||
buildsym_init ();
|
||
}
|
||
|
||
/* Initializer for this module */
|
||
|
||
void
|
||
_initialize_buildsym ()
|
||
{
|
||
}
|