X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=lib%2Fbacktrace.c;h=c6829d77c19bda1feef4cec6ad8f58ae40266145;hb=a64f0b0fcd00da464aa87a93d303f7564a29e1a1;hp=07060390056aa8371e6bbedef3c0bbf8265b0978;hpb=064af42167bf4fc9aaea2702d80ce08074b889c0;p=openvswitch

diff --git a/lib/backtrace.c b/lib/backtrace.c
index 07060390..c6829d77 100644
--- a/lib/backtrace.c
+++ b/lib/backtrace.c
@@ -1,31 +1,48 @@
 /*
- * Copyright (c) 2008, 2009 Nicira Networks.
+ * Copyright (c) 2008, 2009, 2010, 2011 Nicira, Inc.
  *
- * Permission to use, copy, modify, and/or 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.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
  *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
  */
 
 #include <config.h>
+
 #include "backtrace.h"
+
 #include <errno.h>
 #include <inttypes.h>
 #include <stdbool.h>
 #include <stdio.h>
-#include "compiler.h"
 
-#define THIS_MODULE VLM_backtrace
+#include "compiler.h"
 #include "vlog.h"
 
-static uintptr_t UNUSED
+VLOG_DEFINE_THIS_MODULE(backtrace);
+
+#ifdef HAVE_BACKTRACE
+#include <execinfo.h>
+void
+backtrace_capture(struct backtrace *b)
+{
+    void *frames[BACKTRACE_MAX_FRAMES];
+    int i;
+
+    b->n_frames = backtrace(frames, BACKTRACE_MAX_FRAMES);
+    for (i = 0; i < b->n_frames; i++) {
+        b->frames[i] = (uintptr_t) frames[i];
+    }
+}
+#elif __GNUC__
+static uintptr_t
 get_max_stack(void)
 {
     static const char file_name[] = "/proc/self/maps";
@@ -42,7 +59,7 @@ get_max_stack(void)
     for (line_number = 1; fgets(line, sizeof line, f); line_number++) {
         if (strstr(line, "[stack]")) {
             uintptr_t end;
-            if (sscanf(line, "%*"SCNxPTR"-%"SCNxPTR, &end) != 1) {
+            if (sscanf(line, "%*x-%"SCNxPTR, &end) != 1) {
                 VLOG_WARN("%s:%d: parse error", file_name, line_number);
                 continue;
             }
@@ -69,16 +86,8 @@ stack_high(void)
 static uintptr_t
 stack_low(void)
 {
-#ifdef __i386__
-    uintptr_t low;
-    asm("movl %%esp,%0" : "=g" (low));
+    uintptr_t low = (uintptr_t) &low;
     return low;
-#else
-    /* This causes a warning in GCC that cannot be disabled, so use it only on
-     * non-x86. */
-    int dummy;
-    return (uintptr_t) &dummy;
-#endif
 }
 
 static bool
@@ -104,3 +113,10 @@ backtrace_capture(struct backtrace *backtrace)
     }
     backtrace->n_frames = n;
 }
+#else  /* !HAVE_BACKTRACE && !__GNUC__ */
+void
+backtrace_capture(struct backtrace *backtrace)
+{
+    backtrace->n_frames = 0;
+}
+#endif