#endif
}
+
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 *cmd = xbt_new(char,strlen(ADDR2LINE)+25+strlen(xbt_binary_name)+32*e->used);
char *curr=cmd;
/* to extract the addresses from the backtrace */
/* size (in char) of pointers on this arch */
int addr_len=0;
-
+
+ /* 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);
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);
-
+ addrs[i]=bprintf("%s", buff);
+ 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]);
}
/* 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)) {
+ DEBUG2("Found static symbol %s() at %s", line_func, line_pos);
e->bt_strings[i] = bprintf("** In %s() at %s (static symbol)", line_func,line_pos);
} else {
/* Damn. The symbol is in a dynamic library. Let's get wild */
DEBUG4("%#lx %s [%#lx-%#lx]",
addr, found? "in":"out of",first,last);
}
- if (!found)
- CRITICAL0("Problem while reading the maps file");
-
fclose(maps);
free(maps_name);
+ if (!found) {
+ 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;
+ }
+
/* Ok, Found the offset of the maps line containing the searched symbol.
We now need to substract this from the address we got from backtrace.
*/
p2 = strrchr(p,'(');
if (p2) *p2= '\0';
p2 = strrchr(p,' ');
- if (p2) *p2= '\0';
+ if(p2) *p2= '\0';
/* Here we go, fire an addr2line up */
subcmd = bprintf("%s -f -e %s %s",ADDR2LINE,p, addrs[i]);
/* check whether the trick worked */
if (strcmp("??",line_func)) {
+ DEBUG2("Found dynamic symbol %s() at %s", line_func, line_pos);
e->bt_strings[i] = bprintf("** In %s() at %s (dynamic symbol)", line_func,line_pos);
} else {
/* damn, nothing to do here. Let's print the raw address */
+ DEBUG1("Dynamic symbol not found. Raw address = %s", backtrace[i]);
e->bt_strings[i] = bprintf("** In ?? (%s)", backtrace[i]);
}
}
if (e->remote)
bprintf(" on host %s(%ld)",e->host,e->pid);
+ CRITICAL1("%s",e->msg);
fprintf(stderr,
"** SimGrid: UNCAUGHT EXCEPTION received on %s(%ld): category: %s; value: %d\n"
"** %s\n"
- "** Thrown by %s()%s",
+ "** Thrown by %s()%s\n",
gras_os_myname(),gras_os_getpid(),
xbt_ex_catname(e->category), e->value, e->msg,
e->procname,thrower?thrower:" in this process");
}
/* 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;
+ex_ctx_cb_t XBT_PUBLIC_DATA __xbt_ex_ctx = &__xbt_ex_ctx_default;
+ex_term_cb_t XBT_PUBLIC_DATA __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 */
/* end_of_bad_example */
}
#endif
-
+typedef struct {char *first;} global_context_t;
+
static void good_example(void) {
- struct {char*first;} *globalcontext;
+ global_context_t *global_context=malloc(sizeof(global_context_t));
xbt_ex_t ex;
/* GOOD_EXAMPLE */
char * volatile /*03*/ cp3 = NULL /*02*/;
TRY {
cp1 = mallocex(SMALLAMOUNT);
- globalcontext->first = cp1;
+ global_context->first = cp1;
cp1 = NULL /*05 give away*/;
cp2 = mallocex(TOOBIG);
cp3 = mallocex(SMALLAMOUNT);
