X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/e40d8a3c090b9106352693e52ea61e63ecbbe93d..7c49d0269c4163c8b4d8232dd7d43f21abea3a44:/src/xbt/ex.c diff --git a/src/xbt/ex.c b/src/xbt/ex.c index b92e0c1caa..cfd8991891 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 @@ -39,6 +21,9 @@ #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; @@ -63,10 +48,12 @@ void xbt_backtrace_display(void) { e.remote=0; xbt_ex_free(e); #else - fprintf(stderr,"No backtrace on this arch"); + ERROR0("No backtrace on this arch"); #endif } +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) int i; @@ -74,8 +61,7 @@ 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)+strlen(xbt_binary_name)+20*e->used); - char *curr=cmd; + char *cmd, *curr; /* to extract the addresses from the backtrace */ char **addrs=xbt_new(char*,e->used); @@ -87,42 +73,98 @@ 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 */ e->bt_strings = xbt_new(char*,e->used); + VERB1("Fire a first command: '%s'", cmd); pipe = popen(cmd, "r"); - // xbt_assert(pipe);//,"Cannot fork addr2line to display the backtrace"); + 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)) { - e->bt_strings[i] = bprintf("** At %s: %s (%s)", - addrs[i], 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; FILE *maps; char maps_buff[512]; - long int addr,offset,offset_save; + long int addr,offset=0; char *p,*p2; char *subcmd; @@ -133,62 +175,112 @@ void xbt_ex_setup_backtrace(xbt_ex_t *e) { maps_name=bprintf("/proc/%d/maps",(int)getpid()); maps=fopen(maps_name,"r"); - addr=strtol(addrs[i]+2, NULL,16); + 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; - offset_save = offset; - offset=strtol(maps_buff,NULL,16); - if (offset > addr) + 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; + } + 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); - /* Ok, the maps line we just read is beyond the searched symbol. Got it, - the symbol is in previous map, which offset is in offset_save. + 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. */ - offset=offset_save; 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'; + 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); - subpipe = popen(subcmd,"r"); - 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); + /* 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)) { - e->bt_strings[i] = bprintf("** At %s: %s (%s)", - addrs[i], line_func,line_pos); + DEBUG2("Found dynamic symbol %s() at %s", 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 */ - p = bprintf("%s",backtrace[i]); - p2 = strrchr(p,' '); - *p2= '\0'; - e->bt_strings[i] = bprintf("** At %s: ?? (%s)", addrs[i], p); - free(p); + DEBUG1("Dynamic symbol not found. Raw address = %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); @@ -199,14 +291,22 @@ void xbt_ex_setup_backtrace(xbt_ex_t *e) { /** @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(%d)",e->host,e->pid); fprintf(stderr, - "** SimGrid: UNCAUGHT EXCEPTION on %s: category: %s; value: %d\n" + "** SimGrid: UNCAUGHT EXCEPTION received on %s(%d): category: %s; value: %d\n" "** %s\n" - "** Thrown by %s%s%s", - gras_os_myname(), + "** Thrown by %s()%s\n", + gras_os_myname(),(*xbt_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"); + CRITICAL1("%s",e->msg); + + if (thrower) + free(thrower); if (!e->remote && !e->bt_strings) xbt_ex_setup_backtrace(e); @@ -237,8 +337,9 @@ 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_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; + void xbt_ex_free(xbt_ex_t e) { int i; @@ -256,7 +357,7 @@ void xbt_ex_free(xbt_ex_t e) { free((char*)e.bt_strings[i]); free((char **)e.bt_strings); } -// memset(e,0,sizeof(xbt_ex_t)); + /* memset(e,0,sizeof(xbt_ex_t)); */ } /** \brief returns a short name for the given exception category */ @@ -283,6 +384,7 @@ int backtrace (void **__array, int __size) { #endif #ifdef SIMGRID_TEST +#include #include "xbt/ex.h" XBT_TEST_SUITE("xbt_ex","Exception Handling"); @@ -438,9 +540,10 @@ static void bad_example(void) { /* end_of_bad_example */ } #endif - +typedef struct {char *first;} global_context_t; + static void good_example(void) { - struct {char*first;} *globalcontext; + global_context_t *global_context=malloc(sizeof(global_context_t)); xbt_ex_t ex; /* GOOD_EXAMPLE */ @@ -450,7 +553,7 @@ static void good_example(void) { char * volatile /*03*/ cp3 = NULL /*02*/; TRY { cp1 = mallocex(SMALLAMOUNT); - globalcontext->first = cp1; + global_context->first = cp1; cp1 = NULL /*05 give away*/; cp2 = mallocex(TOOBIG); cp3 = mallocex(SMALLAMOUNT);