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rddbg.c stabs FIXMEs

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This should sort out some very old FIXMEs in code handling stabs
debug info.  Necessary if we are to fuss over freeing up memory before
objdump and objcopy exit.  It is of course better from a user
viewpoint to *not* free memory, which takes some time, and leave that
to process exit.  The only reason to do so is that having many memory
leaks in binutils/ code tends to hide leaks in bfd/ or opcodes/, which
we should care about.

	* budbg.h (parse_stab): Update prototype.
	* debug.h (debug_start_source): Update prototype.
	* debug.c (debug_start_source): Add name_used.  Set if stashed.
	* rddbg.c (read_symbol_stabs_debugging_info): Always malloc
	stab string passed to parse_stab.  Free stab string when
	unreferenced.
	(read_section_stabs_debugging_info): Likewise, and strings
	section contents.
	* stabs.c (parse_stab): Add string_used param.  Set if string
	stashed.  Pass to debug_start_source.  Realloc file_types
	array rather that using malloc.  Clarify comment about
	debug_make_indirect_type.
This commit is contained in:
Alan Modra
2023-03-31 13:36:16 +10:30
parent 31991eaaee
commit a633691333
5 changed files with 36 additions and 23 deletions
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25
binutils/stabs.c
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@@ -422,11 +422,12 @@ finish_stab (void *dhandle, void *handle)
bool
parse_stab (void *dhandle, void *handle, int type, int desc, bfd_vma value,
const char *string)
const char *string, bool *string_used)
{
const char * string_end;
struct stab_handle *info = (struct stab_handle *) handle;
*string_used = false;
/* gcc will emit two N_SO strings per compilation unit, one for the
directory name and one for the file name. We just collect N_SO
strings as we see them, and start the new compilation unit when
@@ -447,11 +448,11 @@ parse_stab (void *dhandle, void *handle, int type, int desc, bfd_vma value,
info->file_start_offset = info->so_value;
/* We need to reset the mapping from type numbers to types. We
can't free the old mapping, because of the use of
debug_make_indirect_type. */
can only free the file_types array, not the stab_types
list entries due to the use of debug_make_indirect_type. */
info->files = 1;
info->file_types = ((struct stab_types **)
xmalloc (sizeof *info->file_types));
xrealloc (info->file_types, sizeof *info->file_types));
info->file_types[0] = NULL;
info->so_string = NULL;
@@ -566,21 +567,29 @@ parse_stab (void *dhandle, void *handle, int type, int desc, bfd_vma value,
case N_SOL:
/* Start an include file. */
if (! debug_start_source (dhandle, string))
if (! debug_start_source (dhandle, string, string_used))
return false;
break;
case N_BINCL:
/* Start an include file which may be replaced. */
*string_used = true;
push_bincl (info, string, value);
if (! debug_start_source (dhandle, string))
if (! debug_start_source (dhandle, string, string_used))
return false;
break;
case N_EINCL:
/* End an N_BINCL include. */
if (! debug_start_source (dhandle, pop_bincl (info)))
return false;
string = pop_bincl (info);
if (! debug_start_source (dhandle, string, string_used))
{
free ((char *) string);
return false;
}
if (!*string_used)
free ((char *) string);
*string_used = false;
break;
case N_EXCL: