X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/b26df2277c5891bfef2822891d4d7235da4c51c7..08aaedd334e95fc144248a31cf6411ecf1b08052:/src/xbt/ex.c?ds=sidebyside

diff --git a/src/xbt/ex.c b/src/xbt/ex.c
index 21215dd52a..4eeaba0f6a 100644
--- a/src/xbt/ex.c
+++ b/src/xbt/ex.c
@@ -16,12 +16,24 @@
 
 #include "portable.h" /* execinfo when available */
 #include "xbt/ex.h"
+#include "xbt/str.h"
 #include "xbt/module.h" /* xbt_binary_name */
+#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"
 
+#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) && !defined(__GNUC__)
+# define HAVE_BACKTRACE 1 /* Hello x86 windows box */
+#endif 
+   
+
 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(xbt_ex,xbt,"Exception mecanism");
 
 /* default __ex_ctx callback function */
@@ -45,15 +57,13 @@ ex_ctx_t *__xbt_ex_ctx_default(void) {
 void xbt_ex_setup_backtrace(xbt_ex_t *e);
 
 void xbt_backtrace_current(xbt_ex_t *e) {
-#if defined(HAVE_EXECINFO_H) && defined(HAVE_POPEN) && defined(ADDR2LINE)
-  e->used     = backtrace((void**)e->bt,XBT_BACKTRACE_SIZE);
-  e->bt_strings = NULL;
+#ifdef HAVE_BACKTRACE
   xbt_ex_setup_backtrace(e);
 #endif
 }
 
 void xbt_backtrace_display(xbt_ex_t *e) {
-#if defined(HAVE_EXECINFO_H) && defined(HAVE_POPEN) && defined(ADDR2LINE)
+#ifdef HAVE_BACKTRACE
   int i;
 
   if (e->used == 0) {
@@ -70,6 +80,7 @@ void xbt_backtrace_display(xbt_ex_t *e) {
   e->remote=0;
   xbt_ex_free(*e);
 #else 
+
   ERROR0("No backtrace on this arch");
 #endif
 }
@@ -81,244 +92,13 @@ void xbt_backtrace_display_current(void) {
   xbt_backtrace_display(&e);
 }
 
-#ifndef WIN32
-extern char **environ; /* the environment, as specified by the opengroup */
-#endif
-
-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, *curr;
-  
-  /* 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;
-
-  /* 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 */
-  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; i<e->used;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';
-    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");
-  if (!pipe) {
-    CRITICAL0("Cannot fork addr2line to display the backtrace");
-    abort();
-  }
-
-  for (i=0; i<e->used; 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", 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;
-	}
-	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);
-
-      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]);
-      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();
-	 }
-	 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", 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 ?? 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; j<e->used; j++)
-	 free(addrs[j]);
-       e->used = i+1;
-    }
-     
-    if (!strncmp("__context_wrapper",line_func,strlen("__context_wrapper"))) {
-       int j;
-       for (j=i+1; j<e->used; j++)
-	 free(addrs[j]);
-       e->used = i;
-    }
-     
-    
-  }
-  pclose(pipe);
-  free(addrs);
-  free(backtrace);
-  free(cmd);
+# include "backtrace_linux.c"
+#elif (defined(WIN32) && defined (_M_IX86)) && !defined(__GNUC__)
+# 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)  {
@@ -342,7 +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;
@@ -368,8 +148,8 @@ void __xbt_ex_terminate_default(xbt_ex_t *e)  {
 }
 
 /* the externally visible API */
-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;
+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) {
@@ -406,13 +186,6 @@ 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 <stdio.h>