// Copyright (c) 2006, Google Inc.
// All rights reserved.
//
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// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
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// minidump_stackwalk.cc: Print the stack of the exception thread from a
// minidump.
//
// Author: Mark Mentovai

#include <stdlib.h>
#include <stdio.h>

#include <string>

#include "google/call_stack.h"
#include "google/stack_frame.h"
#include "processor/minidump.h"
#include "processor/scoped_ptr.h"
#include "processor/stackwalker_x86.h"


using std::string;
using google_airbag::CallStack;
using google_airbag::MemoryRegion;
using google_airbag::Minidump;
using google_airbag::MinidumpContext;
using google_airbag::MinidumpException;
using google_airbag::MinidumpModuleList;
using google_airbag::MinidumpThread;
using google_airbag::MinidumpThreadList;
using google_airbag::scoped_ptr;
using google_airbag::StackFrame;
using google_airbag::Stackwalker;


int main(int argc, char **argv) {
  if (argc != 2) {
    fprintf(stderr, "usage: %s <file>\n", argv[0]);
    exit(1);
  }

  Minidump minidump(argv[1]);
  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);
  }

  scoped_ptr<Stackwalker> stackwalker(
      Stackwalker::StackwalkerForCPU(context, stack_memory, modules, NULL));
  if (!stackwalker.get()) {
    fprintf(stderr, "Stackwalker::StackwalkerForCPU failed\n");
    exit(1);
  }

  scoped_ptr<CallStack> stack(stackwalker->Walk());

  unsigned int index;
  for (index = 0; index < stack->frames()->size(); ++index) {
    StackFrame *frame = stack->frames()->at(index);
    printf("[%2d]  instruction = 0x%08llx  \"%s\" + 0x%08llx\n",
           index,
           frame->instruction,
           frame->module_base ? frame->module_name.c_str() : "0x0",
           frame->instruction - frame->module_base);
  }

  return 0;
}