X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/cf7ebd6e502a23cdb48e71cf7521ceb5e4f04417..5b9cf50be0a43c599b20b1ed28341971a571d70d:/src/xbt/ex.c diff --git a/src/xbt/ex.c b/src/xbt/ex.c index 5896971119..29941d5282 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; @@ -48,7 +33,7 @@ ex_ctx_t *__xbt_ex_ctx_default(void) { /** \brief show the backtrace of the current point (lovely while debuging) */ -void xbt_display_backtrace(void) { +void xbt_backtrace_display(void) { #if defined(HAVE_EXECINFO_H) && defined(HAVE_POPEN) && defined(ADDR2LINE) xbt_ex_t e; int i; @@ -56,17 +41,18 @@ void xbt_display_backtrace(void) { e.used = backtrace((void**)e.bt,XBT_BACKTRACE_SIZE); e.bt_strings = NULL; xbt_ex_setup_backtrace(&e); - for (i=0; ibt, e->used); /* To build the commandline of addr2line */ - char *cmd = xbt_new(char,strlen(ADDR2LINE)+strlen(xbt_binary_name)+20*e->used); + 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 */ @@ -84,42 +70,149 @@ void xbt_ex_setup_backtrace(xbt_ex_t *e) { /* 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); - + 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"); - // 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 (static symbol)", line_func,line_pos); } else { - char *p=bprintf("%s",backtrace[i]); - char *pos=strrchr(p,' '); - *pos = '\0'; - e->bt_strings[i] = bprintf("** At %s: ?? (%s)", addrs[i], p); + /* 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); @@ -128,14 +221,22 @@ 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(%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); @@ -154,7 +255,7 @@ void xbt_ex_display(xbt_ex_t *e) { fprintf(stderr," at %s:%d:%s (no backtrace available on that arch)\n", e->file,e->line,e->func); #endif - xbt_ex_free(e); + xbt_ex_free(*e); } @@ -166,26 +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) { +void xbt_ex_free(xbt_ex_t e) { int i; - if (e->msg) free(e->msg); - if (e->remote) { - free(e->procname); - free(e->file); - free(e->func); - free(e->host); + if (e.msg) free(e.msg); + if (e.remote) { + free(e.procname); + free(e.file); + free(e.func); + free(e.host); } - if (e->bt_strings) { - for (i=0; iused; i++) - free((char*)e->bt_strings[i]); - free((char **)e->bt_strings); + if (e.bt_strings) { + for (i=0; i #include "xbt/ex.h" XBT_TEST_SUITE("xbt_ex","Exception Handling"); @@ -235,7 +338,7 @@ XBT_TEST_UNIT("controlflow",test_controlflow, "basic nested control flow") { if (n != 3) xbt_test_fail1("M3: n=%d (!= 3)", n); n++; - xbt_ex_free(&ex); + xbt_ex_free(ex); } n++; TRY { @@ -256,7 +359,7 @@ XBT_TEST_UNIT("controlflow",test_controlflow, "basic nested control flow") { if (n != 7) xbt_test_fail1("M4: n=%d (!= 7)", n); n++; - xbt_ex_free(&ex); + xbt_ex_free(ex); } if (n != 8) xbt_test_fail1("M5: n=%d (!= 8)", n); @@ -275,7 +378,7 @@ XBT_TEST_UNIT("value",test_value,"exception value passing") { xbt_test_fail1("value=%d (!= 2)", ex.value); if (strcmp(ex.msg,"toto")) xbt_test_fail1("message=%s (!= toto)", ex.msg); - xbt_ex_free(&ex); + xbt_ex_free(ex); } } @@ -298,7 +401,7 @@ XBT_TEST_UNIT("variables",test_variables,"variable value preservation") { /* r2 is allowed to be destroyed because not volatile */ if (v2 != 5678) xbt_test_fail1("v2=%d (!= 5678)", v2); - xbt_ex_free(&ex); + xbt_ex_free(ex); } } @@ -323,7 +426,7 @@ XBT_TEST_UNIT("cleanup",test_cleanup,"cleanup handling") { xbt_test_fail1("v1 = %d (!= 5678)", v1); if (!(ex.category == 1 && ex.value == 2 && !strcmp(ex.msg,"blah"))) xbt_test_fail0("unexpected exception contents"); - xbt_ex_free(&ex); + xbt_ex_free(ex); } if (!c) xbt_test_fail0("xbt_ex_free not executed"); @@ -367,9 +470,10 @@ 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 */ @@ -379,7 +483,7 @@ 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);