-void xbt_ex_setup_backtrace(xbt_ex_t *e) {
-#if defined(HAVE_EXECINFO_H) && defined(HAVE_POPEN) && defined(ADDR2LINE)
- int i;
- /* to get the backtrace from the libc */
- char **backtrace = backtrace_symbols (e->bt, e->used);
-
- /* To build the commandline of addr2line */
- char *cmd, *curr;
-
- /* to extract the addresses from the backtrace */
- char **addrs=xbt_new(char*,e->used);
- char buff[256],*p;
-
- /* To read the output of addr2line */
- FILE *pipe;
- char line_func[1024],line_pos[1024];
-
- /* size (in char) of pointers on this arch */
- int addr_len=0;
-
- /* To search for the right executable path when not trivial */
- struct stat stat_buf;
- char *binary_name = NULL;
-
- /* Some arches only have stubs of backtrace, no implementation (hppa comes to mind) */
- if (!e->used)
- return;
-
- /* build the commandline */
- if (stat(xbt_binary_name,&stat_buf)) {
- /* Damn. binary not in current dir. We'll have to dig the PATH to find it */
- int i;
- for (i=0; environ[i]; i++) {
- if (!strncmp("PATH=",environ[i], 5)) {
- xbt_dynar_t path=xbt_str_split(environ[i] + 5, ":");
- unsigned int cpt;
- char *data;
- xbt_dynar_foreach(path, cpt, data) {
- if (binary_name)
- free(binary_name);
- binary_name = bprintf("%s/%s",data,xbt_binary_name);
- if (!stat(binary_name,&stat_buf)) {
- /* Found. */
- DEBUG1("Looked in the PATH for the binary. Found %s",binary_name);
- xbt_dynar_free(&path);
- break;
- }
- }
- if (stat(binary_name,&stat_buf)) {
- /* not found */
- e->used = 1;
- e->bt_strings = xbt_new(char*,1);
- e->bt_strings[0] = bprintf("(binary '%s' not found the path)",xbt_binary_name);
- return;
- }
- xbt_dynar_free(&path);
- break;
- }
- }
- } else {
- binary_name = xbt_strdup(xbt_binary_name);
- }
- cmd = curr = xbt_new(char,strlen(ADDR2LINE)+25+strlen(binary_name)+32*e->used);
-
- curr += sprintf(curr,"%s -f -e %s ",ADDR2LINE,binary_name);
- free(binary_name);
-
- for (i=0; i<e->used;i++) {
- /* retrieve this address */
- DEBUG2("Retrieving address number %d from '%s'", i, backtrace[i]);
- snprintf(buff,256,"%s",strchr(backtrace[i],'[')+1);
- p=strchr(buff,']');
- *p='\0';
- if (strcmp(buff,"(nil)"))
- addrs[i]=bprintf("%s", buff);
- else
- addrs[i]=bprintf("0x0");
- DEBUG3("Set up a new address: %d, '%s'(%p)", i, addrs[i], addrs[i]);
-
- /* Add it to the command line args */
- curr+=sprintf(curr,"%s ",addrs[i]);
- }
- addr_len = strlen(addrs[0]);
-
- /* parse the output and build a new backtrace */
- e->bt_strings = xbt_new(char*,e->used);
-
- VERB1("Fire a first command: '%s'", cmd);
- pipe = popen(cmd, "r");
- if (!pipe) {
- CRITICAL0("Cannot fork addr2line to display the backtrace");
- abort();
- }