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