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/*
* DCAP - dCache Access Protocol client interface
*
* Copyright (C) 2000,2004 DESY Hamburg DMG-Division.
*
* AUTHOR: Tigran Mkrtchayn (tigran.mkrtchyan@desy.de)
*
* This program can be distributed under the terms of the GNU LGPL.
* See the file COPYING.LIB
*
*/
/*
* $Id: gettrace.c,v 1.3 2004-11-01 19:33:29 tigran Exp $
*/
#include <stdio.h>
#include <stdlib.h>
#include <bfd.h>
#include <signal.h>
#include <string.h>
#include <unistd.h>
#include <sys/param.h>
#include "dcap.h"
#include "gettrace.h"
#ifndef MAXPATHLEN
#define MAXPATHLEN 4096
#endif
/* Local function prototypes */
static void mcheck_init_bfd(char *name);
static asymbol **read_bfd_stuff(bfd *);
static void mcheck_lookup_method_info(const char **file,
const char **func,
unsigned int *line, const char *address);
static int printStackInfo(const char *address, int i);
static void init_traceBack();
static asymbol **sym;
static bfd *abfd;
static asection *core_text_sect;
static int init;
void mcheck_init_bfd(char *name)
{
bfd_init();
abfd = bfd_openr(name, 0);
if (!abfd) {
dc_debug(DC_CALLS, "Unable to open it '%s'", name);
return;
}
if (!bfd_check_format(abfd, bfd_object)) {
dc_debug(DC_CALLS, "Bad format!");
return;
}
/* get core's text section: */
core_text_sect = bfd_get_section_by_name(abfd, ".text");
if (!core_text_sect) {
core_text_sect = bfd_get_section_by_name(abfd, "$CODE$");
if (!core_text_sect) {
dc_debug(DC_CALLS, "Can't find .text section");
return;
}
sym = (asymbol **) read_bfd_stuff(abfd);
}
}
asymbol **read_bfd_stuff(bfd * abfd)
{
long storage_needed;
asymbol **symbol_table;
long number_of_symbols;
storage_needed = bfd_get_symtab_upper_bound(abfd);
if (storage_needed < 0) {
return 0;
}
if (storage_needed == 0) {
return 0;
}
symbol_table = (asymbol **) malloc(storage_needed);
number_of_symbols = bfd_canonicalize_symtab(abfd, symbol_table);
if (number_of_symbols < 0) {
return 0;
}
return symbol_table;
}
void mcheck_lookup_method_info(const char **file,
const char **func,
unsigned int *line, const char *address)
{
bfd_vma vma;
vma = (bfd_vma) (address - core_text_sect->vma);
bfd_find_nearest_line(abfd, core_text_sect, sym, vma, file, func,
line);
}
int printStackInfo(const char *address, int i)
{
const char *file = NULL;
const char *func = NULL, *s;
unsigned int line;
int ret = 1;
mcheck_lookup_method_info(&file, &func, &line, address);
if (!file) {
file = "<unknown-file>";
} else {
s = strrchr(file, '/');
if (s != NULL)
file = s + 1;
}
if (!func) {
func = "<unknown-function>";
} else {
if ( (strstr(func, "_start") )|| (strstr(func, "main") ) ) {
ret = 0;
}
}
dc_debug(DC_CALLS, "#%d 0x%x in %s () at %s:%d", i, (unsigned int)address, func, file, line);
return ret;
}
void init_traceBack()
{
char exename[MAXPATHLEN];
int res;
if( !init) {
/*
* get the name of the current executable
*/
if ((res = readlink("/proc/self/exe", exename, MAXPATHLEN - 1)) == -1)
exename[0] = '\0';
else
exename[res] = '\0';
mcheck_init_bfd(exename);
++init;
}
}
void showTraceBack()
{
unsigned long returnStack[16];
int i;
int max = 0;
int more = 1;
init_traceBack();
dc_debug(DC_CALLS, "Stack backtrace:");
getStackTrace(returnStack, &max);
for (i = 1; i < max && more; i++) {
more = printStackInfo((const char *) (returnStack[i]), i - 1);
}
return;
}
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