X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/6bda480f1d89e26a239de6900837b0285e379cea..f93abc6448737e66b30c1eb5f4d341dc518d6d00:/src/xbt/ex.c diff --git a/src/xbt/ex.c b/src/xbt/ex.c index e45ecf194e..365c922147 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 */ @@ -16,224 +16,105 @@ #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; 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); +} -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; 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); - 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; iused; 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); @@ -241,7 +122,7 @@ void xbt_ex_display(xbt_ex_t *e) { 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; @@ -267,8 +148,8 @@ void __xbt_ex_terminate_default(xbt_ex_t *e) { } /* 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_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) { @@ -305,15 +186,9 @@ const char * xbt_ex_catname(xbt_errcat_t cat) { } } -#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 #include "xbt/ex.h" XBT_TEST_SUITE("xbt_ex","Exception Handling");