X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/02e75a7f7efe038912bb2c583d0a84f4e31781c0..ccf56140eb0b973a50ce9a981fa3e38667748495:/src/xbt/ex.c diff --git a/src/xbt/ex.c b/src/xbt/ex.c index 934bfe9af1..adfc14ac21 100644 --- a/src/xbt/ex.c +++ b/src/xbt/ex.c @@ -2,7 +2,7 @@ /* 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 */ /* Copyright (c) 2002-2004 The OSSP Project */ /* Copyright (c) 2002-2004 Cable & Wireless */ @@ -17,41 +17,71 @@ #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; iused == 0) { + fprintf(stderr,"(backtrace not set)\n"); + } else { + fprintf(stderr,"Backtrace (displayed in thread %p):\n", + (void*)xbt_thread_self()); + for (i=1; iused; 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) @@ -60,8 +90,7 @@ void xbt_ex_setup_backtrace(xbt_ex_t *e) { 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); @@ -74,24 +103,68 @@ void xbt_ex_setup_backtrace(xbt_ex_t *e) { /* 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; iused;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 */ @@ -112,8 +185,8 @@ void xbt_ex_setup_backtrace(xbt_ex_t *e) { 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); + 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; @@ -155,8 +228,10 @@ void xbt_ex_setup_backtrace(xbt_ex_t *e) { 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); @@ -179,38 +254,62 @@ void xbt_ex_setup_backtrace(xbt_ex_t *e) { /* 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)) { 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); + 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 */ DEBUG1("Dynamic symbol not found. Raw address = %s", backtrace[i]); - e->bt_strings[i] = bprintf("** In ?? (%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; jused; j++) + free(addrs[j]); + e->used = i+1; + } + + if (!strncmp("__context_wrapper",line_func,strlen("__context_wrapper"))) { + int j; + for (j=i+1; jused; j++) + free(addrs[j]); + e->used = i; + } + + } pclose(pipe); free(addrs); @@ -224,16 +323,16 @@ void xbt_ex_display(xbt_ex_t *e) { 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); @@ -267,8 +366,9 @@ void __xbt_ex_terminate_default(xbt_ex_t *e) { } /* the externally visible API */ -XBT_PUBLIC_NO_IMPORT(ex_ctx_cb_t) __xbt_ex_ctx = &__xbt_ex_ctx_default; -XBT_PUBLIC_NO_IMPORT(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) { int i; @@ -313,6 +413,7 @@ int backtrace (void **__array, int __size) { #endif #ifdef SIMGRID_TEST +#include #include "xbt/ex.h" XBT_TEST_SUITE("xbt_ex","Exception Handling");