Initial implementation of x86 stackwalker (#9). r=bryner

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@12 4c0a9323-5329-0410-9bdc-e9ce6186880e

src/processor/minidump_stackwalk.cc

@@ -0,0 +1,118 @@
+// Copyright (C) 2006 Google Inc.
+//
+// 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
+//
+//     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.
+
+// minidump_stackwalk.cc: Print the stack of the exception thread from a
+// minidump.
+//
+// Author: Mark Mentovai
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#ifndef _WIN32
+#include <unistd.h>
+#define O_BINARY 0
+#else // !_WIN32
+#include <io.h>
+#define open _open
+#endif // !_WIN32
+
+#include <memory>
+
+#include "processor/minidump.h"
+#include "processor/stackwalker_x86.h"
+
+
+using std::auto_ptr;
+using namespace google_airbag;
+
+
+int main(int argc, char** argv) {
+  if (argc != 2) {
+    fprintf(stderr, "usage: %s <file>\n", argv[0]);
+    exit(1);
+  }
+
+  int fd = open(argv[1], O_RDONLY | O_BINARY);
+  if (fd == -1) {
+    fprintf(stderr, "open failed\n");
+    exit(1);
+  }
+
+  Minidump minidump(fd);
+  if (!minidump.Read()) {
+    fprintf(stderr, "minidump.Read() failed\n");
+    exit(1);
+  }
+
+  MinidumpException* exception = minidump.GetException();
+  if (!exception) {
+    fprintf(stderr, "minidump.GetException() failed\n");
+    exit(1);
+  }
+
+  MinidumpThreadList* thread_list = minidump.GetThreadList();
+  if (!thread_list) {
+    fprintf(stderr, "minidump.GetThreadList() failed\n");
+    exit(1);
+  }
+
+  MinidumpThread* exception_thread =
+   thread_list->GetThreadByID(exception->GetThreadID());
+  if (!exception_thread) {
+    fprintf(stderr, "thread_list->GetThreadByID() failed\n");
+    exit(1);
+  }
+
+  MemoryRegion* stack_memory = exception_thread->GetMemory();
+  if (!stack_memory) {
+    fprintf(stderr, "exception_thread->GetStackMemory() failed\n");
+    exit(1);
+  }
+
+  MinidumpContext* context = exception->GetContext();
+  if (!context) {
+    fprintf(stderr, "exception->GetContext() failed\n");
+    exit(1);
+  }
+
+  MinidumpModuleList* modules = minidump.GetModuleList();
+  if (!modules) {
+    fprintf(stderr, "minidump.GetModuleList() failed\n");
+    exit(1);
+  }
+
+  StackwalkerX86 stackwalker = StackwalkerX86(context, stack_memory, modules);
+
+  auto_ptr<StackFrames> stack(stackwalker.Walk());
+  if (!stack.get()) {
+     fprintf(stderr, "stackwalker->Walk() failed\n");
+     exit(1);
+  }
+
+  unsigned int index;
+  for (index = 0 ; index < stack->size() ; index++) {
+    StackFrame frame = stack->at(index);
+    printf("[%2d]  ebp = 0x%08llx  eip = 0x%08llx  \"%s\" + 0x%08llx\n",
+           index,
+           frame.frame_pointer,
+           frame.instruction,
+           frame.module_base ? frame.module_name.c_str() : "0x0",
+           frame.instruction - frame.module_base);
+  }
+
+  return 0;
+}