aboutsummaryrefslogtreecommitdiff
path: root/src/processor/microdump.cc
blob: 2473c35ce93d34d01081ea61037c8245fe295209 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
// Copyright (c) 2014 Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// 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.
//     * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

// microdump.cc: A microdump reader.
//
// See microdump.h for documentation.

#include "google_breakpad/processor/microdump.h"

#include <stdio.h>
#include <string.h>

#include <memory>
#include <sstream>
#include <string>
#include <vector>

#include "google_breakpad/common/minidump_cpu_arm.h"
#include "google_breakpad/processor/code_module.h"
#include "processor/basic_code_module.h"
#include "processor/linked_ptr.h"
#include "processor/logging.h"
#include "processor/range_map-inl.h"

namespace {
static const char kGoogleBreakpadKey[] = "google-breakpad";
static const char kMicrodumpBegin[] = "-----BEGIN BREAKPAD MICRODUMP-----";
static const char kMicrodumpEnd[] = "-----END BREAKPAD MICRODUMP-----";
static const char kOsKey[] = ": O ";
static const char kCpuKey[] = ": C ";
static const char kCrashReasonKey[] = ": R ";
static const char kGpuKey[] = ": G ";
static const char kMmapKey[] = ": M ";
static const char kStackKey[] = ": S ";
static const char kStackFirstLineKey[] = ": S 0 ";
static const char kArmArchitecture[] = "arm";
static const char kArm64Architecture[] = "arm64";
static const char kX86Architecture[] = "x86";
static const char kMipsArchitecture[] = "mips";
static const char kMips64Architecture[] = "mips64";
static const char kGpuUnknown[] = "UNKNOWN";

template<typename T>
T HexStrToL(const string& str) {
  uint64_t res = 0;
  std::istringstream ss(str);
  ss >> std::hex >> res;
  return static_cast<T>(res);
}

std::vector<uint8_t> ParseHexBuf(const string& str) {
  std::vector<uint8_t> buf;
  for (size_t i = 0; i < str.length(); i += 2) {
    buf.push_back(HexStrToL<uint8_t>(str.substr(i, 2)));
  }
  return buf;
}

bool GetLine(std::istringstream* istream, string* str) {
  if (std::getline(*istream, *str)) {
    // Trim any trailing newline from the end of the line. Allows us
    // to seamlessly handle both Windows/DOS and Unix formatted input. The
    // adb tool generally writes logcat dumps in Windows/DOS format.
    if (!str->empty() && str->at(str->size() - 1) == '\r') {
      str->erase(str->size() - 1);
    }
    return true;
  }
  return false;
}

}  // namespace

namespace google_breakpad {

//
// MicrodumpModules
//

void MicrodumpModules::Add(const CodeModule* module) {
  linked_ptr<const CodeModule> module_ptr(module);
  if (!map_.StoreRange(module->base_address(), module->size(), module_ptr)) {
    BPLOG(ERROR) << "Module " << module->code_file() <<
                    " could not be stored";
  }
}

void MicrodumpModules::SetEnableModuleShrink(bool is_enabled) {
  map_.SetEnableShrinkDown(is_enabled);
}

//
// MicrodumpContext
//

void MicrodumpContext::SetContextARM(MDRawContextARM* arm) {
  DumpContext::SetContextFlags(MD_CONTEXT_ARM);
  DumpContext::SetContextARM(arm);
  valid_ = true;
}

void MicrodumpContext::SetContextARM64(MDRawContextARM64* arm64) {
  DumpContext::SetContextFlags(MD_CONTEXT_ARM64);
  DumpContext::SetContextARM64(arm64);
  valid_ = true;
}

void MicrodumpContext::SetContextX86(MDRawContextX86* x86) {
  DumpContext::SetContextFlags(MD_CONTEXT_X86);
  DumpContext::SetContextX86(x86);
  valid_ = true;
}

void MicrodumpContext::SetContextMIPS(MDRawContextMIPS* mips32) {
  DumpContext::SetContextFlags(MD_CONTEXT_MIPS);
  DumpContext::SetContextMIPS(mips32);
  valid_ = true;
}

void MicrodumpContext::SetContextMIPS64(MDRawContextMIPS* mips64) {
  DumpContext::SetContextFlags(MD_CONTEXT_MIPS64);
  DumpContext::SetContextMIPS(mips64);
  valid_ = true;
}


//
// MicrodumpMemoryRegion
//

MicrodumpMemoryRegion::MicrodumpMemoryRegion() : base_address_(0) { }

void MicrodumpMemoryRegion::Init(uint64_t base_address,
                                 const std::vector<uint8_t>& contents) {
  base_address_ = base_address;
  contents_ = contents;
}

uint64_t MicrodumpMemoryRegion::GetBase() const { return base_address_; }

uint32_t MicrodumpMemoryRegion::GetSize() const { return contents_.size(); }

bool MicrodumpMemoryRegion::GetMemoryAtAddress(uint64_t address,
                                               uint8_t* value) const {
  return GetMemoryLittleEndian(address, value);
}

bool MicrodumpMemoryRegion::GetMemoryAtAddress(uint64_t address,
                                               uint16_t* value) const {
  return GetMemoryLittleEndian(address, value);
}

bool MicrodumpMemoryRegion::GetMemoryAtAddress(uint64_t address,
                                               uint32_t* value) const {
  return GetMemoryLittleEndian(address, value);
}

bool MicrodumpMemoryRegion::GetMemoryAtAddress(uint64_t address,
                                               uint64_t* value) const {
  return GetMemoryLittleEndian(address, value);
}

template<typename ValueType>
bool MicrodumpMemoryRegion::GetMemoryLittleEndian(uint64_t address,
                                                  ValueType* value) const {
  if (address < base_address_ ||
      address - base_address_ + sizeof(ValueType) > contents_.size())
    return false;
  ValueType v = 0;
  uint64_t start = address - base_address_;
  // The loop condition is odd, but it's correct for size_t.
  for (size_t i = sizeof(ValueType) - 1; i < sizeof(ValueType); i--)
    v = (v << 8) | static_cast<uint8_t>(contents_[start + i]);
  *value = v;
  return true;
}

void MicrodumpMemoryRegion::Print() const {
  // Not reached, just needed to honor the base class contract.
  assert(false);
}

//
// Microdump
//
Microdump::Microdump(const string& contents)
  : context_(new MicrodumpContext()),
    stack_region_(new MicrodumpMemoryRegion()),
    modules_(new MicrodumpModules()),
    system_info_(new SystemInfo()),
    crash_reason_(),
    crash_address_(0u) {
  assert(!contents.empty());

  bool in_microdump = false;
  string line;
  uint64_t stack_start = 0;
  std::vector<uint8_t> stack_content;
  string arch;

  std::istringstream stream(contents);
  while (GetLine(&stream, &line)) {
    if (line.find(kGoogleBreakpadKey) == string::npos) {
      continue;
    }
    if (line.find(kMicrodumpBegin) != string::npos) {
      in_microdump = true;
      continue;
    }
    if (!in_microdump) {
      continue;
    }
    if (line.find(kMicrodumpEnd) != string::npos) {
      break;
    }

    size_t pos;
    if ((pos = line.find(kOsKey)) != string::npos) {
      string os_str(line, pos + strlen(kOsKey));
      std::istringstream os_tokens(os_str);
      string os_id;
      string num_cpus;
      string os_version;
      // This reflect the actual HW arch and might not match the arch emulated
      // for the execution (e.g., running a 32-bit binary on a 64-bit cpu).
      string hw_arch;

      os_tokens >> os_id;
      os_tokens >> arch;
      os_tokens >> num_cpus;
      os_tokens >> hw_arch;
      GetLine(&os_tokens, &os_version);
      os_version.erase(0, 1);  // remove leading space.

      system_info_->cpu = arch;
      system_info_->cpu_count = HexStrToL<uint8_t>(num_cpus);
      system_info_->os_version = os_version;

      if (os_id == "L") {
        system_info_->os = "Linux";
        system_info_->os_short = "linux";
      } else if (os_id == "A") {
        system_info_->os = "Android";
        system_info_->os_short = "android";
        modules_->SetEnableModuleShrink(true);
      }

      // OS line also contains release and version for future use.
    } else if ((pos = line.find(kStackKey)) != string::npos) {
      if (line.find(kStackFirstLineKey) != string::npos) {
        // The first line of the stack (S 0 stack header) provides the value of
        // the stack pointer, the start address of the stack being dumped and
        // the length of the stack. We could use it in future to double check
        // that we received all the stack as expected.
        continue;
      }
      string stack_str(line, pos + strlen(kStackKey));
      std::istringstream stack_tokens(stack_str);
      string start_addr_str;
      string raw_content;
      stack_tokens >> start_addr_str;
      stack_tokens >> raw_content;
      uint64_t start_addr = HexStrToL<uint64_t>(start_addr_str);

      if (stack_start != 0) {
        // Verify that the stack chunks in the microdump are contiguous.
        assert(start_addr == stack_start + stack_content.size());
      } else {
        stack_start = start_addr;
      }
      std::vector<uint8_t> chunk = ParseHexBuf(raw_content);
      stack_content.insert(stack_content.end(), chunk.begin(), chunk.end());

    } else if ((pos = line.find(kCpuKey)) != string::npos) {
      string cpu_state_str(line, pos + strlen(kCpuKey));
      std::vector<uint8_t> cpu_state_raw = ParseHexBuf(cpu_state_str);
      if (strcmp(arch.c_str(), kArmArchitecture) == 0) {
        if (cpu_state_raw.size() != sizeof(MDRawContextARM)) {
          std::cerr << "Malformed CPU context. Got " << cpu_state_raw.size()
                    << " bytes instead of " << sizeof(MDRawContextARM)
                    << std::endl;
          continue;
        }
        MDRawContextARM* arm = new MDRawContextARM();
        memcpy(arm, &cpu_state_raw[0], cpu_state_raw.size());
        context_->SetContextARM(arm);
      } else if (strcmp(arch.c_str(), kArm64Architecture) == 0) {
        if (cpu_state_raw.size() != sizeof(MDRawContextARM64)) {
          std::cerr << "Malformed CPU context. Got " << cpu_state_raw.size()
                    << " bytes instead of " << sizeof(MDRawContextARM64)
                    << std::endl;
          continue;
        }
        MDRawContextARM64* arm = new MDRawContextARM64();
        memcpy(arm, &cpu_state_raw[0], cpu_state_raw.size());
        context_->SetContextARM64(arm);
      } else if (strcmp(arch.c_str(), kX86Architecture) == 0) {
        if (cpu_state_raw.size() != sizeof(MDRawContextX86)) {
          std::cerr << "Malformed CPU context. Got " << cpu_state_raw.size()
                    << " bytes instead of " << sizeof(MDRawContextX86)
                    << std::endl;
          continue;
        }
        MDRawContextX86* x86 = new MDRawContextX86();
        memcpy(x86, &cpu_state_raw[0], cpu_state_raw.size());
        context_->SetContextX86(x86);
      } else if (strcmp(arch.c_str(), kMipsArchitecture) == 0) {
        if (cpu_state_raw.size() != sizeof(MDRawContextMIPS)) {
          std::cerr << "Malformed CPU context. Got " << cpu_state_raw.size()
                    << " bytes instead of " << sizeof(MDRawContextMIPS)
                    << std::endl;
          continue;
        }
        MDRawContextMIPS* mips32 = new MDRawContextMIPS();
        memcpy(mips32, &cpu_state_raw[0], cpu_state_raw.size());
        context_->SetContextMIPS(mips32);
      } else if (strcmp(arch.c_str(), kMips64Architecture) == 0) {
        if (cpu_state_raw.size() != sizeof(MDRawContextMIPS)) {
          std::cerr << "Malformed CPU context. Got " << cpu_state_raw.size()
                    << " bytes instead of " << sizeof(MDRawContextMIPS)
                    << std::endl;
          continue;
        }
        MDRawContextMIPS* mips64 = new MDRawContextMIPS();
        memcpy(mips64, &cpu_state_raw[0], cpu_state_raw.size());
        context_->SetContextMIPS64(mips64);
      } else {
        std::cerr << "Unsupported architecture: " << arch << std::endl;
      }
    } else if ((pos = line.find(kCrashReasonKey)) != string::npos) {
      string crash_reason_str(line, pos + strlen(kCrashReasonKey));
      std::istringstream crash_reason_tokens(crash_reason_str);
      string signal;
      string address;
      crash_reason_tokens >> signal;
      crash_reason_tokens >> crash_reason_;
      crash_reason_tokens >> address;
      crash_address_ = HexStrToL<uint64_t>(address);
    } else if ((pos = line.find(kGpuKey)) != string::npos) {
      string gpu_str(line, pos + strlen(kGpuKey));
      if (strcmp(gpu_str.c_str(), kGpuUnknown) != 0) {
        std::istringstream gpu_tokens(gpu_str);
        std::getline(gpu_tokens, system_info_->gl_version, '|');
        std::getline(gpu_tokens, system_info_->gl_vendor, '|');
        std::getline(gpu_tokens, system_info_->gl_renderer, '|');
      }
    } else if ((pos = line.find(kMmapKey)) != string::npos) {
      string mmap_line(line, pos + strlen(kMmapKey));
      std::istringstream mmap_tokens(mmap_line);
      string addr, offset, size, identifier, filename;
      mmap_tokens >> addr;
      mmap_tokens >> offset;
      mmap_tokens >> size;
      mmap_tokens >> identifier;
      mmap_tokens >> filename;

      modules_->Add(new BasicCodeModule(
          HexStrToL<uint64_t>(addr),  // base_address
          HexStrToL<uint64_t>(size),  // size
          filename,                   // code_file
          identifier,                 // code_identifier
          filename,                   // debug_file
          identifier,                 // debug_identifier
          ""));                       // version
    }
  }
  stack_region_->Init(stack_start, stack_content);
}

}  // namespace google_breakpad