/* ex - Exception Handling (modified to fit into SimGrid from OSSP version) */
-/* Copyright (c) 2005-2006 Martin Quinson */
+/* Copyright (c) 2005, 2006, 2007 Martin Quinson */
/* Copyright (c) 2002-2004 Ralf S. Engelschall <rse@engelschall.com> */
/* Copyright (c) 2002-2004 The OSSP Project <http://www.ossp.org/> */
/* Copyright (c) 2002-2004 Cable & Wireless <http://www.cw.com/> */
#include "portable.h" /* execinfo when available */
#include "xbt/ex.h"
#include "xbt/module.h" /* xbt_binary_name */
-#include "xbt/ex_interface.h"
+#include "xbt/synchro.h" /* xbt_thread_self */
#include "gras/Virtu/virtu_interface.h" /* gras_os_myname */
+#include "xbt/ex_interface.h"
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(xbt_ex,xbt,"Exception mecanism");
-
/* default __ex_ctx callback function */
ex_ctx_t *__xbt_ex_ctx_default(void) {
+ /* Don't scream: this is a default which is never used (so, yes,
+ there is one setjump container by running entity).
+
+ This default gets overriden in xbt/xbt_os_thread.c so that it works in
+ real life and in simulation when using threads to implement the simulation
+ processes (ie, with pthreads and on windows).
+
+ It also gets overriden in xbt/context.c when using ucontextes (as well as
+ in Java for now, but after the java overhaul, it will get cleaned out)
+ */
static ex_ctx_t ctx = XBT_CTX_INITIALIZER;
return &ctx;
}
+/* Change raw libc symbols to file names and line numbers */
+void xbt_ex_setup_backtrace(xbt_ex_t *e);
-/** \brief show the backtrace of the current point (lovely while debuging) */
-void xbt_backtrace_display(void) {
+void xbt_backtrace_current(xbt_ex_t *e) {
#if defined(HAVE_EXECINFO_H) && defined(HAVE_POPEN) && defined(ADDR2LINE)
- xbt_ex_t e;
- int i;
+ e->used = backtrace((void**)e->bt,XBT_BACKTRACE_SIZE);
+ e->bt_strings = NULL;
+ xbt_ex_setup_backtrace(e);
+#endif
+}
- e.used = backtrace((void**)e.bt,XBT_BACKTRACE_SIZE);
- e.bt_strings = NULL;
- xbt_ex_setup_backtrace(&e);
- for (i=1; i<e.used; i++) /* no need to display "xbt_display_backtrace" */
- fprintf(stderr,"%s\n",e.bt_strings[i]);
+void xbt_backtrace_display(xbt_ex_t *e) {
+#if defined(HAVE_EXECINFO_H) && defined(HAVE_POPEN) && defined(ADDR2LINE)
+ int i;
- e.msg=NULL;
- e.remote=0;
- xbt_ex_free(e);
+ if (e->used == 0) {
+ fprintf(stderr,"(backtrace not set)\n");
+ } else {
+ fprintf(stderr,"Backtrace (displayed in thread %p):\n",
+ (void*)xbt_thread_self());
+ for (i=1; i<e->used; i++) /* no need to display "xbt_display_backtrace" */
+ fprintf(stderr,"---> %s\n",e->bt_strings[i] +4);
+ }
+
+ /* don't fool xbt_ex_free with uninitialized msg field */
+ e->msg=NULL;
+ e->remote=0;
+ xbt_ex_free(*e);
#else
ERROR0("No backtrace on this arch");
#endif
}
+/** \brief show the backtrace of the current point (lovely while debuging) */
+void xbt_backtrace_display_current(void) {
+ xbt_ex_t e;
+ xbt_backtrace_current(&e);
+ xbt_backtrace_display(&e);
+}
+
+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)
char **backtrace = backtrace_symbols (e->bt, e->used);
/* To build the commandline of addr2line */
- char *cmd = xbt_new(char,strlen(ADDR2LINE)+25+strlen(xbt_binary_name)+32*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]);
/* 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 */
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);
free(addrs[j]);
e->used = i;
}
-
+
}
pclose(pipe);
}
/* the externally visible API */
-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;
+XBT_EXPORT_NO_IMPORT(ex_ctx_cb_t) __xbt_ex_ctx = &__xbt_ex_ctx_default;
+XBT_EXPORT_NO_IMPORT(ex_term_cb_t) __xbt_ex_terminate = &__xbt_ex_terminate_default;
void xbt_ex_free(xbt_ex_t e) {
