#endif
}
+extern char **environ; /* the environment, as specified by the opengroup */
+
void xbt_ex_setup_backtrace(xbt_ex_t *e) {
#if defined(HAVE_EXECINFO_H) && defined(HAVE_POPEN) && defined(ADDR2LINE)
int i;
char **backtrace = backtrace_symbols (e->bt, e->used);
/* To build the commandline of addr2line */
- char *cmd = xbt_new(char,strlen(ADDR2LINE)+strlen(xbt_binary_name)+20*e->used);
- char *curr=cmd;
+ char *cmd, *curr;
/* to extract the addresses from the backtrace */
char **addrs=xbt_new(char*,e->used);
/* 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 */
- curr += sprintf(curr,"%s -f -e %s ",ADDR2LINE,xbt_binary_name);
+ 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, ":");
+ 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';
- addrs[i]=bprintf("%s",buff);
-
+ 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();
}
+
for (i=0; i<e->used; i++) {
+ DEBUG2("Looking for symbol %d, addr = '%s'", i, addrs[i]);
fgets(line_func,1024,pipe);
line_func[strlen(line_func)-1]='\0';
fgets(line_pos,1024,pipe);
line_pos[strlen(line_pos)-1]='\0';
if (strcmp("??",line_func)) {
- e->bt_strings[i] = bprintf("** In %s() at %s (static symbol)", line_func,line_pos);
+ DEBUG2("Found static symbol %s() at %s", line_func, line_pos);
+ e->bt_strings[i] = bprintf("** In %s() at %s", line_func,line_pos);
} else {
/* Damn. The symbol is in a dynamic library. Let's get wild */
char *maps_name;
offset = first;
found=1;
}
- DEBUG4("%#lx %s [%#lx-%#lx]",
- addr, found? "in":"out of",first,last);
+ if (found) {
+ DEBUG3("%#lx in [%#lx-%#lx]", addr, first,last);
+ DEBUG0("Symbol found, map lines not further displayed (even if looking for next ones)");
+ }
}
fclose(maps);
free(maps_name);
if (!found) {
- WARN0("Problem while reading the maps file");
+ VERB0("Problem while reading the maps file. Following backtrace will be mangled.");
+ DEBUG1("No dynamic. Static symbol: %s", backtrace[i]);
e->bt_strings[i] = bprintf("** In ?? (%s)", backtrace[i]);
continue;
}
/* Got it. We have our new address. Let's get the library path and we
are set */
p = xbt_strdup(backtrace[i]);
- p2 = strrchr(p,'(');
- if (p2) *p2= '\0';
- p2 = strrchr(p,' ');
- if (p2) *p2= '\0';
+ if (p[0]=='[') {
+ /* library path not displayed in the map file either... */
+ free(p);
+ sprintf(line_func,"??");
+ } else {
+ p2 = strrchr(p,'(');
+ if (p2) *p2= '\0';
+ p2 = strrchr(p,' ');
+ if(p2) *p2= '\0';
- /* Here we go, fire an addr2line up */
- subcmd = bprintf("%s -f -e %s %s",ADDR2LINE,p, addrs[i]);
- free(p);
- VERB1("Fire a new command: '%s'",subcmd);
- subpipe = popen(subcmd,"r");
- if (!subpipe) {
- CRITICAL0("Cannot fork addr2line to display the backtrace");
- abort();
+ /* Here we go, fire an addr2line up */
+ subcmd = bprintf("%s -f -e %s %s",ADDR2LINE,p, addrs[i]);
+ free(p);
+ VERB1("Fire a new command: '%s'",subcmd);
+ subpipe = popen(subcmd,"r");
+ if (!subpipe) {
+ CRITICAL0("Cannot fork addr2line to display the backtrace");
+ abort();
+ }
+ fgets(line_func,1024,subpipe);
+ line_func[strlen(line_func)-1]='\0';
+ fgets(line_pos,1024,subpipe);
+ line_pos[strlen(line_pos)-1]='\0';
+ pclose(subpipe);
+ free(subcmd);
}
- fgets(line_func,1024,subpipe);
- line_func[strlen(line_func)-1]='\0';
- fgets(line_pos,1024,subpipe);
- line_pos[strlen(line_pos)-1]='\0';
- pclose(subpipe);
- free(subcmd);
/* check whether the trick worked */
if (strcmp("??",line_func)) {
- e->bt_strings[i] = bprintf("** In %s() at %s (dynamic symbol)", line_func,line_pos);
+ DEBUG2("Found dynamic symbol %s() at %s", line_func, line_pos);
+ e->bt_strings[i] = bprintf("** In %s() at %s", line_func,line_pos);
} else {
/* damn, nothing to do here. Let's print the raw address */
- e->bt_strings[i] = bprintf("** In ?? (%s)", backtrace[i]);
+ DEBUG1("Dynamic symbol not found. Raw address = %s", backtrace[i]);
+ e->bt_strings[i] = bprintf("** In ?? at %s", backtrace[i]);
}
+
}
free(addrs[i]);
+
+ /* Mask the bottom of the stack */
+ if (!strncmp("main",line_func,strlen("main"))) {
+ int j;
+ for (j=i+1; j<e->used; j++)
+ free(addrs[j]);
+ e->used = i+1;
+ }
+
+ if (!strncmp("__context_wrapper",line_func,strlen("__context_wrapper"))) {
+ int j;
+ for (j=i+1; j<e->used; j++)
+ free(addrs[j]);
+ e->used = i;
+ }
+
+
}
pclose(pipe);
free(addrs);
char *thrower=NULL;
if (e->remote)
- bprintf(" on host %s(%ld)",e->host,e->pid);
+ bprintf(" on host %s(%d)",e->host,e->pid);
- CRITICAL1("%s",e->msg);
fprintf(stderr,
- "** SimGrid: UNCAUGHT EXCEPTION received on %s(%ld): category: %s; value: %d\n"
+ "** SimGrid: UNCAUGHT EXCEPTION received on %s(%d): category: %s; value: %d\n"
"** %s\n"
"** Thrown by %s()%s\n",
- gras_os_myname(),gras_os_getpid(),
+ gras_os_myname(),(*xbt_getpid)(),
xbt_ex_catname(e->category), e->value, e->msg,
e->procname,thrower?thrower:" in this process");
+ CRITICAL1("%s",e->msg);
if (thrower)
free(thrower);
}
/* the externally visible API */
-ex_ctx_cb_t __xbt_ex_ctx = &__xbt_ex_ctx_default;
-ex_term_cb_t __xbt_ex_terminate = &__xbt_ex_terminate_default;
+XBT_PUBLIC_DATA(ex_ctx_cb_t) __xbt_ex_ctx = &__xbt_ex_ctx_default;
+XBT_PUBLIC_DATA(ex_term_cb_t) __xbt_ex_terminate = &__xbt_ex_terminate_default;
+
void xbt_ex_free(xbt_ex_t e) {
int i;
free((char*)e.bt_strings[i]);
free((char **)e.bt_strings);
}
-// memset(e,0,sizeof(xbt_ex_t));
+ /* memset(e,0,sizeof(xbt_ex_t)); */
}
/** \brief returns a short name for the given exception category */
#endif
#ifdef SIMGRID_TEST
+#include <stdio.h>
#include "xbt/ex.h"
XBT_TEST_SUITE("xbt_ex","Exception Handling");
