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/****************************************************************************
* *
* GNATMEM COMPONENTS *
* *
* G M E M *
* *
* *
* C Implementation File *
* *
* Copyright (C) 2000-2001 Free Software Foundation, Inc. *
* *
* GNAT is free software; you can redistribute it and/or modify it under *
* terms of the GNU General Public License as published by the Free Soft- *
* ware Foundation; either version 2, or (at your option) any later ver- *
* sion. GNAT is distributed in the hope that it will be useful, but WITH- *
* OUT 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 distributed with GNAT; see file COPYING. If not, write *
* to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, *
* MA 02111-1307, USA. *
* *
* As a special exception, if you link this file with other files to *
* produce an executable, this file does not by itself cause the resulting *
* executable to be covered by the GNU General Public License. This except- *
* ion does not however invalidate any other reasons why the executable *
* file might be covered by the GNU Public License. *
* *
* GNAT was originally developed by the GNAT team at New York University. *
* Extensive contributions were provided by Ada Core Technologies Inc. *
* *
****************************************************************************/
/* This unit reads the allocation tracking log produced by augmented
__gnat_malloc and __gnat_free procedures (see file a-raise.c) and
provides GNATMEM tool with gdb-compliant output. The output is
processed by GNATMEM to detect dynamic memory allocation errors.
See GNATMEM section in GNAT User's Guide for more information.
NOTE: This capability is currently supported on the following targets:
DEC Unix
SGI Irix
GNU/Linux x86
Solaris (sparc and x86) (*)
Windows 98/95/NT (x86)
(*) on these targets, the compilation must be done with -funwind-tables to
be able to build the stack backtrace. */
#ifdef __alpha_vxworks
#include "vxWorks.h"
#endif
#ifdef IN_RTS
#include "tconfig.h"
#include "tsystem.h"
#else
#include "config.h"
#include "system.h"
#endif
#include "adaint.h"
static FILE *gmemfile;
/* tb_len is the number of call level supported by this module */
#define TB_LEN 200
static char *tracebk[TB_LEN];
static int cur_tb_len, cur_tb_pos;
extern void convert_addresses PARAMS ((char *[], int, void *,
int *));
static void gmem_read_backtrace PARAMS ((void));
static char *spc2nul PARAMS ((char *));
extern int __gnat_gmem_initialize PARAMS ((char *));
extern void __gnat_gmem_a2l_initialize PARAMS ((char *));
extern void __gnat_gmem_read_next PARAMS ((char *));
extern void __gnat_gmem_read_bt_frame PARAMS ((char *));
/* Reads backtrace information from gmemfile placing them in tracebk
array. cur_tb_len is the size of this array. */
static void
gmem_read_backtrace ()
{
fread (&cur_tb_len, sizeof (int), 1, gmemfile);
fread (tracebk, sizeof (char *), cur_tb_len, gmemfile);
cur_tb_pos = 0;
}
/* Initialize gmem feature from the dumpname file. Return 1 if the
dumpname has been generated by GMEM (instrumented malloc/free) and 0 if not
(i.e. probably a GDB generated file). */
int
__gnat_gmem_initialize (dumpname)
char *dumpname;
{
char header[10];
gmemfile = fopen (dumpname, "rb");
fread (header, 10, 1, gmemfile);
/* Check for GMEM magic-tag. */
if (memcmp (header, "GMEM DUMP\n", 10))
{
fclose (gmemfile);
return 0;
}
return 1;
}
/* Initialize addr2line library */
void
__gnat_gmem_a2l_initialize (exename)
char *exename;
{
extern char **gnat_argv;
char s[100];
int l;
gnat_argv[0] = exename;
convert_addresses (tracebk, 1, s, &l);
}
/* Read next allocation of deallocation information from the GMEM file and
write an alloc/free information in buf to be processed by GDB (see gnatmem
implementation). */
void
__gnat_gmem_read_next (buf)
char *buf;
{
void *addr;
int size;
int j;
j = fgetc (gmemfile);
if (j == EOF)
{
fclose (gmemfile);
sprintf (buf, "Program exited.");
}
else
{
switch (j)
{
case 'A' :
fread (&addr, sizeof (char *), 1, gmemfile);
fread (&size, sizeof (int), 1, gmemfile);
sprintf (buf, "ALLOC^%d^0x%lx^", size, (long) addr);
break;
case 'D' :
fread (&addr, sizeof (char *), 1, gmemfile);
sprintf (buf, "DEALL^0x%lx^", (long) addr);
break;
default:
puts ("GMEM dump file corrupt");
__gnat_os_exit (1);
}
gmem_read_backtrace ();
}
}
/* Scans the line until the space or new-line character is encountered;
this character is replaced by nul and its position is returned. */
static char *
spc2nul (s)
char *s;
{
while (*++s)
if (*s == ' ' || *s == '\n')
{
*s = 0;
return s;
}
abort ();
}
/* Convert backtrace address in tracebk at position cur_tb_pos to a symbolic
traceback information returned in buf and to be processed by GDB (see
gnatmem implementation). */
void
__gnat_gmem_read_bt_frame (buf)
char *buf;
{
int l = 0;
char s[1000];
char *name, *file;
if (cur_tb_pos >= cur_tb_len)
{
buf[0] = ' ';
buf[1] = '\0';
return;
}
convert_addresses (tracebk + cur_tb_pos, 1, s, &l);
s[l] = '\0';
name = spc2nul (s) + 4;
file = spc2nul (name) + 4;
spc2nul (file);
++cur_tb_pos;
sprintf (buf, "# %s () at %s", name, file);
}
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