/* 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/str.h"
#include "xbt/module.h" /* xbt_binary_name */
-#include "xbt/ex_interface.h"
+#include "xbt_modinter.h" /* backtrace initialization headers */
+#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");
+#undef HAVE_BACKTRACE
+#if defined(HAVE_EXECINFO_H) && defined(HAVE_POPEN) && defined(ADDR2LINE)
+# define HAVE_BACKTRACE 1 /* Hello linux box */
+#endif
+
+#if defined(WIN32) && defined(_M_IX86)
+# define HAVE_BACKTRACE 1 /* Hello x86 windows box */
+#endif
+
+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) {
-#if defined(HAVE_EXECINFO_H) && defined(HAVE_POPEN) && defined(ADDR2LINE)
- xbt_ex_t e;
- int i;
+void xbt_backtrace_current(xbt_ex_t *e) {
+#ifdef HAVE_BACKTRACE
+ 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) {
+#ifdef HAVE_BACKTRACE
+ 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);
+}
-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 = xbt_new(char,strlen(ADDR2LINE)+25+strlen(xbt_binary_name)+32*e->used);
- char *curr=cmd;
-
- /* 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;
-
- /* 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);
- 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)) {
- 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 */
- char *maps_name;
- FILE *maps;
- char maps_buff[512];
-
- long int addr,offset=0;
- char *p,*p2;
-
- char *subcmd;
- FILE *subpipe;
- int found=0;
-
- /* let's look for the offset of this library in our addressing space */
- maps_name=bprintf("/proc/%d/maps",(int)getpid());
- maps=fopen(maps_name,"r");
-
- sscanf(addrs[i],"%lx",&addr);
- sprintf(maps_buff,"%#lx",addr);
-
- if (strcmp(addrs[i],maps_buff)) {
- CRITICAL2("Cannot parse backtrace address '%s' (addr=%#lx)",
- addrs[i], addr);
- }
- DEBUG2("addr=%s (as string) =%#lx (as number)",addrs[i],addr);
-
- while (!found) {
- long int first, last;
- if (fgets(maps_buff,512,maps) == NULL)
- break;
- if (i==0) {
- maps_buff[strlen(maps_buff) -1]='\0';
- DEBUG1("map line: %s", maps_buff);
- }
- sscanf(maps_buff,"%lx",&first);
- p=strchr(maps_buff,'-')+1;
- sscanf(p,"%lx",&last);
- if (first < addr && addr < last) {
- offset = first;
- found=1;
- }
- DEBUG4("%#lx %s [%#lx-%#lx]",
- addr, found? "in":"out of",first,last);
- }
- 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.
- */
-
- free(addrs[i]);
- addrs[i] = bprintf("0x%0*lx",addr_len-2,addr-offset);
- DEBUG2("offset=%#lx new addr=%s",offset,addrs[i]);
-
- /* 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';
-
- /* 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);
-
- /* 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]);
- }
- }
- free(addrs[i]);
- }
- pclose(pipe);
- free(addrs);
- free(backtrace);
- free(cmd);
+# include "backtrace_linux.c"
+#elif (defined(WIN32) && defined (_M_IX86))
+# include "backtrace_windows.c"
+#else
+# include "backtrace_dummy.c"
#endif
-}
/** @brief shows an exception content and the associated stack if available */
void xbt_ex_display(xbt_ex_t *e) {
char *thrower=NULL;
if (e->remote)
- bprintf(" on host %s(%ld)",e->host,e->pid);
+ thrower = 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);
if (!e->remote && !e->bt_strings)
xbt_ex_setup_backtrace(e);
-#if defined(HAVE_EXECINFO_H) && defined(HAVE_POPEN) && defined(ADDR2LINE)
+#ifdef HAVE_BACKTRACE
/* We have everything to build neat backtraces */
{
int i;
}
/* the externally visible API */
-ex_ctx_cb_t XBT_DECLARE_DATA __xbt_ex_ctx = &__xbt_ex_ctx_default;
-ex_term_cb_t XBT_DECLARE_DATA __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) {
}
}
-#ifndef HAVE_EXECINFO_H
-/* dummy implementation. We won't use the result, but ex.h needs it to be defined */
-int backtrace (void **__array, int __size) {
- return 0;
-}
-
-#endif
#ifdef SIMGRID_TEST
+#include <stdio.h>
#include "xbt/ex.h"
XBT_TEST_SUITE("xbt_ex","Exception Handling");
