1 /*
2 * Copyright (C) 2018 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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 copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
13 * distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <cxxabi.h>
30 #include <inttypes.h>
31 #include <pthread.h>
32 #include <stdint.h>
33
34 #include <algorithm>
35 #include <memory>
36 #include <string>
37 #include <vector>
38
39 #include <android-base/stringprintf.h>
40 #include <unwindstack/AndroidUnwinder.h>
41 #include <unwindstack/Unwinder.h>
42
43 #include "UnwindBacktrace.h"
44 #include "debug_log.h"
45
46 #if defined(__LP64__)
47 #define PAD_PTR "016" PRIx64
48 #else
49 #define PAD_PTR "08" PRIx64
50 #endif
51
Unwind(std::vector<uintptr_t> * frames,std::vector<unwindstack::FrameData> * frame_info,size_t max_frames)52 bool Unwind(std::vector<uintptr_t>* frames, std::vector<unwindstack::FrameData>* frame_info,
53 size_t max_frames) {
54 [[clang::no_destroy]] static unwindstack::AndroidLocalUnwinder unwinder(
55 std::vector<std::string>{"libc_malloc_debug.so"});
56 unwindstack::AndroidUnwinderData data(max_frames);
57 if (!unwinder.Unwind(data)) {
58 frames->clear();
59 frame_info->clear();
60 return false;
61 }
62
63 frames->resize(data.frames.size());
64 for (const auto& frame : data.frames) {
65 frames->at(frame.num) = frame.pc;
66 }
67 *frame_info = std::move(data.frames);
68 return true;
69 }
70
UnwindLog(const std::vector<unwindstack::FrameData> & frame_info)71 void UnwindLog(const std::vector<unwindstack::FrameData>& frame_info) {
72 for (size_t i = 0; i < frame_info.size(); i++) {
73 const unwindstack::FrameData* info = &frame_info[i];
74 auto map_info = info->map_info;
75
76 std::string line = android::base::StringPrintf(" #%0zd pc %" PAD_PTR " ", i, info->rel_pc);
77 if (map_info != nullptr && map_info->offset() != 0) {
78 line += android::base::StringPrintf("(offset 0x%" PRIx64 ") ", map_info->offset());
79 }
80
81 if (map_info == nullptr) {
82 line += "<unknown>";
83 } else if (map_info->name().empty()) {
84 line += android::base::StringPrintf("<anonymous:%" PRIx64 ">", map_info->start());
85 } else {
86 line += map_info->name();
87 }
88
89 if (!info->function_name.empty()) {
90 line += " (";
91 char* demangled_name =
92 abi::__cxa_demangle(info->function_name.c_str(), nullptr, nullptr, nullptr);
93 if (demangled_name != nullptr) {
94 line += demangled_name;
95 free(demangled_name);
96 } else {
97 line += info->function_name;
98 }
99 if (info->function_offset != 0) {
100 line += "+" + std::to_string(info->function_offset);
101 }
102 line += ")";
103 }
104 error_log_string(line.c_str());
105 }
106 }
107