Update copyright notices

[simgrid.git] / src / xbt / backtrace_linux.c

diff --git a/src/xbt/backtrace_linux.c b/src/xbt/backtrace_linux.c
index af6621a..82a3c66 100644 (file)
--- a/src/xbt/backtrace_linux.c
+++ b/src/xbt/backtrace_linux.c
@@ -1,17 +1,25 @@
 /* backtrace_linux - backtrace displaying on linux platform                 */
 /* This file is included by ex.c on need (have execinfo.h, popen & addrline)*/
 
-/* Copyright (c) 2008, 2009, 2010. The SimGrid Team.
+/* Copyright (c) 2008-2015. The SimGrid Team.
  * 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 <execinfo.h>
+#include <sys/stat.h>
+
 /* This file is to be included in ex.c, so the following headers are not mandatory, but it's to make sure that eclipse see them too */
 #include "xbt/ex.h"
+#include "xbt/log.h"
 #include "xbt/str.h"
 #include "xbt/module.h"         /* xbt_binary_name */
 #include "xbt_modinter.h"       /* backtrace initialization headers */
+#ifdef HAVE_MC
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#endif
 /* end of "useless" inclusions */
 
 extern char **environ;          /* the environment, as specified by the opengroup */
@@ -80,7 +88,8 @@ void xbt_backtrace_current(xbt_ex_t * e)
   e->used = backtrace((void **) e->bt, XBT_BACKTRACE_SIZE);
   if (e->used == 0) {
     fprintf(stderr, "The backtrace() function failed, which probably means that the memory is exhausted. Here is a crude dump of the exception that I was trying to build:");
-    fprintf(stderr, "%s:%s(%d) [%s:%d] %s", e->host,e->procname,e->pid, e->file,e->line,e->msg);
+    fprintf(stderr, "%s(%d) [%s:%d] %s",
+            e->procname, e->pid, e->file, e->line, e->msg);
     fprintf(stderr, "Bailing out now since there is nothing I can do without a decent amount of memory. Please go fix the memleaks\n");
     exit(1);
   }
@@ -116,7 +125,7 @@ void xbt_ex_setup_backtrace(xbt_ex_t * e) //FIXME: This code could be greatly im
 
   e->bt_strings = NULL;
 
-  if (!xbt_binary_name) /* no binary name, nothing to do */
+  if (xbt_binary_name == NULL) /* no binary name, nothing to do */
     return;
 
   if (e->used <= 1)
@@ -200,22 +209,21 @@ void xbt_ex_setup_backtrace(xbt_ex_t * e) //FIXME: This code could be greatly im
   }
 
   for (i = 0; i < e->used; i++) {
-    char *fgets_res;
     XBT_DEBUG("Looking for symbol %d, addr = '%s'", i, addrs[i]);
-    fgets_res = fgets(line_func, 1024, pipe);
-    if (fgets_res == NULL)
-      THROWF(system_error, 0,
-             "Cannot run fgets to look for symbol %d, addr %s", i,
-             addrs[i]);
-    line_func[strlen(line_func) - 1] = '\0';
-    fgets_res = fgets(line_pos, 1024, pipe);
-    if (fgets_res == NULL)
-      THROWF(system_error, 0,
-             "Cannot run fgets to look for symbol %d, addr %s", i,
-             addrs[i]);
-    line_pos[strlen(line_pos) - 1] = '\0';
-
-    if (strcmp("??", line_func)) {
+    if (fgets(line_func, 1024, pipe)) {
+      line_func[strlen(line_func) - 1] = '\0';
+    } else {
+      XBT_VERB("Cannot run fgets to look for symbol %d, addr %s", i, addrs[i]);
+      strcpy(line_func, "???");
+    }
+    if (fgets(line_pos, 1024, pipe)) {
+      line_pos[strlen(line_pos) - 1] = '\0';
+    } else {
+      XBT_VERB("Cannot run fgets to look for symbol %d, addr %s", i, addrs[i]);
+      strcpy(line_pos, backtrace_syms[i]);
+    }
+
+    if (strcmp("??", line_func) != 0) {
       XBT_DEBUG("Found static symbol %s() at %s", line_func, line_pos);
       e->bt_strings[i] =
           bprintf("**   In %s() at %s", line_func, line_pos);
@@ -307,16 +315,18 @@ void xbt_ex_setup_backtrace(xbt_ex_t * e) //FIXME: This code could be greatly im
         if (!subpipe) {
           xbt_die("Cannot fork addr2line to display the backtrace");
         }
-        fgets_res = fgets(line_func, 1024, subpipe);
-        if (fgets_res == NULL)
-          THROWF(system_error, 0, "Cannot read result of subcommand %s",
-                 subcmd);
-        line_func[strlen(line_func) - 1] = '\0';
-        fgets_res = fgets(line_pos, 1024, subpipe);
-        if (fgets_res == NULL)
-          THROWF(system_error, 0, "Cannot read result of subcommand %s",
-                 subcmd);
-        line_pos[strlen(line_pos) - 1] = '\0';
+        if (fgets(line_func, 1024, subpipe)) {
+          line_func[strlen(line_func) - 1] = '\0';
+        } else {
+          XBT_VERB("Cannot read result of subcommand %s", subcmd);
+          strcpy(line_func, "???");
+        }
+        if (fgets(line_pos, 1024, subpipe)) {
+          line_pos[strlen(line_pos) - 1] = '\0';
+        } else {
+          XBT_VERB("Cannot read result of subcommand %s", subcmd);
+          strcpy(line_pos, backtrace_syms[i]);
+        }
         pclose(subpipe);
         free(subcmd);
       }
@@ -363,3 +373,37 @@ void xbt_ex_setup_backtrace(xbt_ex_t * e) //FIXME: This code could be greatly im
   free(backtrace_syms);
   free(cmd);
 }
+
+#ifdef HAVE_MC
+
+int xbt_libunwind_backtrace(void* bt[XBT_BACKTRACE_SIZE], int size){
+  
+  int i = 0;
+  for(i=0; i < size; i++)
+    bt[i] = NULL;
+
+  i=0;
+
+  unw_cursor_t c;
+  unw_context_t uc;
+
+  unw_getcontext (&uc);
+       unw_init_local (&c, &uc);
+ 
+  unw_word_t ip;
+
+  unw_step(&c);
+ 
+  while(unw_step(&c) >= 0 && i < size){
+
+    unw_get_reg(&c, UNW_REG_IP, &ip);
+    bt[i] = (void*)(long)ip;
+    i++;
+
+  }
+
+  return i;
+  
+}
+
+#endif