dwarf_macro.c revision 49d3bc91e27cd871b950d56c01398fa2f2e12ab4
/*
Copyright (C) 2000, 2002 Silicon Graphics, Inc. All Rights Reserved.
under the terms of version 2.1 of the GNU Lesser General Public License
as published by the Free Software Foundation.
This program is distributed in the hope that it would be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Further, this software is distributed without any warranty that it is
free of the rightful claim of any third person regarding infringement
or the like. Any license provided herein, whether implied or
otherwise, applies only to this software file. Patent licenses, if
any, provided herein do not apply to combinations of this program with
other software, or any other product whatsoever.
You should have received a copy of the GNU Lesser General Public
License along with this program; if not, write the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307,
USA.
Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pky,
Mountain View, CA 94043, or:
For further information regarding this notice, see:
*/
#include "config.h"
#include "dwarf_incl.h"
#include <stdio.h>
#include <limits.h>
#include "dwarf_macro.h"
#define LEFTPAREN '('
#define RIGHTPAREN ')'
#define SPACE ' '
/*
Given the dwarf macro string, return a pointer to
the value. Returns pointer to 0 byte at end of string
if no value found (meaning the value is the empty string).
Only understands well-formed dwarf macinfo strings.
*/
char *
dwarf_find_macro_value_start(char *str)
{
char *lcp;
int funclike = 0;
switch (*lcp) {
case LEFTPAREN:
funclike = 1;
break;
case RIGHTPAREN:
/* lcp+1 must be a space, and following char is the value */
return lcp + 2;
case SPACE:
/* we allow extraneous spaces inside macro parameter **
list, just in case... This is not really needed. */
if (!funclike) {
return lcp + 1;
}
break;
}
}
/* never found value: returns pointer to the 0 byte at end of
string */
return lcp;
}
/*
Try to keep fileindex correct in every Macro_Details
record by tracking file starts and ends.
Uses high water mark: space reused, not freed.
Presumption is that this makes sense for most uses.
STARTERMAX is set so that the array need not be expanded for
most files: it is the initial include file depth.
*/
static Dwarf_Signed *st_base;
static long max;
static long next_to_use;
static int was_fault = 0;
#define STARTERMAX 10
static void
_dwarf_reset_index_stack(void)
{
next_to_use = 0;
was_fault = 0;
}
static int
{
if (next_to_use >= max) {
long new_size;
if (max == 0) {
max = STARTERMAX;
}
newbase =
new_size * sizeof(Dwarf_Signed));
if (newbase == 0) {
/* just leave the old array in place */
was_fault = 1;
return DW_DLV_ERROR;
}
}
++next_to_use;
return DW_DLV_OK;
}
static Dwarf_Signed
_dwarf_mac_pop_index(void)
{
if (was_fault) {
return -1;
}
if (next_to_use > 0) {
next_to_use--;
return (*(st_base + next_to_use));
}
return -1;
}
/* starting at macro_offset in .debug_macinfo,
if maximum_count is 0, treat as if it is infinite.
get macro data up thru
maximum_count entries or the end of a compilation
unit's entries (whichever comes first).
*/
int
Dwarf_Error * error)
{
unsigned char uc;
unsigned long depth;
int res;
/* count space used by strings */
unsigned long str_space = 0;
int done = 0;
unsigned long space_needed;
unsigned long string_offset;
unsigned long final_count = 0;
unsigned long count;
unsigned long max_count = (unsigned long) maximum_count;
return (DW_DLV_ERROR);
}
res =
error);
return res;
}
if (macro_base == NULL) {
return (DW_DLV_NO_ENTRY);
}
return (DW_DLV_NO_ENTRY);
}
if (maximum_count == 0) {
}
/* how many entries and how much space will they take? */
/* normal: found last entry */
return DW_DLV_NO_ENTRY;
}
return (DW_DLV_ERROR);
}
unsigned long slen;
++pnext; /* get past the type code */
switch (uc) {
case DW_MACINFO_define:
case DW_MACINFO_undef:
/* line, string */
case DW_MACINFO_vendor_ext:
/* number, string */
return (DW_DLV_ERROR);
}
return (DW_DLV_ERROR);
}
break;
case DW_MACINFO_start_file:
/* line, file index */
return (DW_DLV_ERROR);
}
return (DW_DLV_ERROR);
}
++depth;
break;
case DW_MACINFO_end_file:
if (--depth == 0) {
done = 1;
}
break; /* no string or number here */
case 0:
/* end of cu's entries */
done = 1;
break;
default:
return (DW_DLV_ERROR);
/* bogus macinfo! */
}
done = 1;
return (DW_DLV_ERROR);
}
}
if (count == 0) {
return (DW_DLV_ERROR);
}
/* we have 'count' array entries to allocate and str_space bytes of
string space to provide for. */
/* extra 2 not really needed */
return_data = pdata =
if (pdata == 0) {
return (DW_DLV_ERROR);
}
done = 0;
unsigned long slen;
*
sizeof
return (DW_DLV_ERROR);
}
pdmd->dmd_lineno = 0;
++pnext; /* get past the type code */
switch (uc) {
case DW_MACINFO_define:
case DW_MACINFO_undef:
/* line, string */
case DW_MACINFO_vendor_ext:
/* number, string */
return (DW_DLV_ERROR);
}
latest_str_loc += slen;
return (DW_DLV_ERROR);
}
break;
case DW_MACINFO_start_file:
/* line, file index */
return (DW_DLV_ERROR);
}
/* we ignore the error, we just let fileindex ** be -1 when
we pop this one */
return (DW_DLV_ERROR);
}
break;
case DW_MACINFO_end_file:
break; /* no string or number here */
case 0:
/* end of cu's entries */
done = 1;
break;
default:
return (DW_DLV_ERROR);
/* bogus macinfo! */
}
}
*entry_count = count;
return DW_DLV_OK;
}