X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/6939542e87acfb3ee4b452d2b85098fd9d53d49f..dcbbc368228a7623d2f8a53028f6da8f64a5a128:/src/xbt/ex.c diff --git a/src/xbt/ex.c b/src/xbt/ex.c index bc955a5e1c..02e8edcebd 100644 --- a/src/xbt/ex.c +++ b/src/xbt/ex.c @@ -1,33 +1,15 @@ -/* -** OSSP ex - Exception Handling (modified to fit into SimGrid) -** Copyright (c) 2005 Martin Quinson -** Copyright (c) 2002-2004 Ralf S. Engelschall -** Copyright (c) 2002-2004 The OSSP Project -** Copyright (c) 2002-2004 Cable & Wireless -** -** This file is part of OSSP ex, an exception handling library -** which can be found at http://www.ossp.org/pkg/lib/ex/. -** -** Permission to use, copy, modify, and distribute this software for -** any purpose with or without fee is hereby granted, provided that -** the above copyright notice and this permission notice appear in all -** copies. -** -** THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED -** WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF -** MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. -** IN NO EVENT SHALL THE AUTHORS AND COPYRIGHT HOLDERS AND THEIR -** CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT -** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF -** USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND -** ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, -** OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT -** OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF -** SUCH DAMAGE. -** -** ex.c: exception handling (compiler part) -*/ +/* $Id$ */ + +/* ex - Exception Handling (modified to fit into SimGrid from OSSP version) */ + +/* Copyright (c) 2005-2006 Martin Quinson */ +/* Copyright (c) 2002-2004 Ralf S. Engelschall */ +/* Copyright (c) 2002-2004 The OSSP Project */ +/* Copyright (c) 2002-2004 Cable & Wireless */ +/* All rights reserved. */ + +/* This program is free software; you can redistribute it and/or modify it + * under the terms of the license (GNU LGPL) which comes with this package. */ #include #include @@ -35,9 +17,13 @@ #include "portable.h" /* execinfo when available */ #include "xbt/ex.h" #include "xbt/module.h" /* xbt_binary_name */ +#include "xbt/ex_interface.h" #include "gras/Virtu/virtu_interface.h" /* gras_os_myname */ +XBT_LOG_NEW_DEFAULT_SUBCATEGORY(xbt_ex,xbt,"Exception mecanism"); + + /* default __ex_ctx callback function */ ex_ctx_t *__xbt_ex_ctx_default(void) { static ex_ctx_t ctx = XBT_CTX_INITIALIZER; @@ -45,80 +31,231 @@ ex_ctx_t *__xbt_ex_ctx_default(void) { return &ctx; } -static void xbt_ex_setup_backtrace(xbt_ex_t *e) { - 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)+strlen(xbt_binary_name)+20*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]; + +/** \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; + + e.used = backtrace((void**)e.bt,XBT_BACKTRACE_SIZE); + e.bt_strings = NULL; + xbt_ex_setup_backtrace(&e); + for (i=1; ibt, 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 */ - snprintf(buff,256,"%s",strchr(backtrace[i],'[')+1); - p=strchr(buff,']'); - *p='\0'; - addrs[i]=bprintf("%s",buff); - - /* 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); + /* 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]); - pipe = popen(cmd, "r"); -// xbt_assert(pipe);//,"Cannot fork addr2line to display the backtrace"); - for (i=0; iused; i++) { - fgets(line_func,1024,pipe); + /* 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,pipe); + fgets(line_pos,1024,subpipe); line_pos[strlen(line_pos)-1]='\0'; - - e->bt_strings[i] = bprintf("** At %s: %s (%s)", addrs[i], line_func,line_pos); - free(addrs[i]); - } - free(addrs); - free(backtrace); - free(cmd); + 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); +#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); + CRITICAL1("%s",e->msg); fprintf(stderr, - "** SimGrid: UNCAUGHT EXCEPTION on %s: category: %s; value: %d\n" + "** SimGrid: UNCAUGHT EXCEPTION received on %s(%ld): category: %s; value: %d\n" "** %s\n" - "** Thrown by %s%s%s", - gras_os_myname(), + "** Thrown by %s()%s\n", + gras_os_myname(),gras_os_getpid(), xbt_ex_catname(e->category), e->value, e->msg, - e->procname, (e->host?"@":""),(e->host?e->host:"")); + e->procname,thrower?thrower:" in this process"); + + 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) /* We have everything to build neat backtraces */ - { - int i; - - fprintf(stderr,"\n"); - if (!e->bt_strings) - xbt_ex_setup_backtrace(e); - for (i=0; iused; i++) - printf("%s\n",e->bt_strings[i]); - - } + { + int i; + + fprintf(stderr,"\n"); + for (i=0; iused; i++) + fprintf(stderr,"%s\n",e->bt_strings[i]); + + } #else - fprintf(stderr," at %s:%d:%s (no backtrace available on that arch)\n", e->file,e->line,e->func); + fprintf(stderr," at %s:%d:%s (no backtrace available on that arch)\n", + e->file,e->line,e->func); #endif + xbt_ex_free(*e); } @@ -130,25 +267,27 @@ 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; +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; if (e.msg) free(e.msg); - free(e.procname); if (e.remote) { + free(e.procname); free(e.file); free(e.func); free(e.host); } - /* locally, only one chunk of memory is allocated by the libc */ + if (e.bt_strings) { for (i=0; ifirst = cp1; + global_context->first = cp1; cp1 = NULL /*05 give away*/; cp2 = mallocex(TOOBIG); cp3 = mallocex(SMALLAMOUNT);