1e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org// Copyright (c) 2013 Google Inc.
2e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org// All rights reserved.
3e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org//
4e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org// Redistribution and use in source and binary forms, with or without
5e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org// modification, are permitted provided that the following conditions are
6e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org// met:
7e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org//
8e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org//     * Redistributions of source code must retain the above copyright
9e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org// notice, this list of conditions and the following disclaimer.
10e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org//     * Redistributions in binary form must reproduce the above
11e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org// copyright notice, this list of conditions and the following disclaimer
12e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org// in the documentation and/or other materials provided with the
13e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org// distribution.
14e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org//     * Neither the name of Google Inc. nor the names of its
15e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org// contributors may be used to endorse or promote products derived from
16e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org// this software without specific prior written permission.
17e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org//
18e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org
30e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org// stackwalker_address_list.cc: a pseudo stack walker.
31e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org//
32e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org// See stackwalker_address_list.h for documentation.
33e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org//
34e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org// Author: Chris Hamilton <chrisha@chromium.org>
35e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org
36e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org#include <assert.h>
37e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org
38e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org#include <vector>
39e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org
40e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org#include "google_breakpad/processor/call_stack.h"
41e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org#include "google_breakpad/processor/memory_region.h"
42e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org#include "google_breakpad/processor/source_line_resolver_interface.h"
43e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org#include "google_breakpad/processor/stack_frame.h"
44e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org#include "processor/logging.h"
45e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org#include "processor/stackwalker_address_list.h"
46e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org
47e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.orgnamespace google_breakpad {
48e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org
49e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.orgStackwalkerAddressList::StackwalkerAddressList(
50e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org    const uint64_t* frames,
51e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org    size_t frame_count,
52e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org    const CodeModules* modules,
53e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org    StackFrameSymbolizer* frame_symbolizer)
54e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org    : Stackwalker(NULL, NULL, modules, frame_symbolizer),
55e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org      frames_(frames),
56e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org      frame_count_(frame_count) {
57e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org  assert(frames);
58e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org  assert(frame_symbolizer);
59e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org}
60e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org
61e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.orgStackFrame* StackwalkerAddressList::GetContextFrame() {
62e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org  if (frame_count_ == 0)
63e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org    return NULL;
64e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org
65e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org  StackFrame* frame = new StackFrame();
66e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org  frame->instruction = frames_[0];
678d58ea41134906c4e3f3f6ed813720f9d8e5e065chrisha@chromium.org  frame->trust = StackFrame::FRAME_TRUST_PREWALKED;
68e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org  return frame;
69e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org}
70e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org
71e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.orgStackFrame* StackwalkerAddressList::GetCallerFrame(const CallStack* stack,
72e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org                                                   bool stack_scan_allowed) {
73e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org  if (!stack) {
74e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org    BPLOG(ERROR) << "Can't get caller frame without stack";
75e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org    return NULL;
76e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org  }
77e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org
78e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org  size_t frame_index = stack->frames()->size();
79e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org
80e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org  // There are no more frames to fetch.
81e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org  if (frame_index >= frame_count_)
82e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org    return NULL;
83e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org
84e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org  // All frames have the highest level of trust because they were
85e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org  // explicitly provided.
86e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org  StackFrame* frame = new StackFrame();
87e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org  frame->instruction = frames_[frame_index];
885a82db4773c983cfa2adc0d7f9682ce5717d523echrisha@chromium.org  frame->trust = StackFrame::FRAME_TRUST_PREWALKED;
89e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org  return frame;
90e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org}
91e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org
92e6758b14481b3ee1eddc4d51725375c7fc7cf6bfchrisha@chromium.org}  // namespace google_breakpad
93