summaryrefslogtreecommitdiffstats
path: root/toolkit/crashreporter/breakpad-client/windows/crash_generation/minidump_generator.cc
blob: 0e0643c5a1952824f68f308d591d72560e11b3cd (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
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
// Copyright (c) 2008, 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.

#include "windows/crash_generation/minidump_generator.h"

#include <assert.h>
#include <avrfsdk.h>

#include <algorithm>
#include <iterator>
#include <list>
#include <vector>

#include "windows/common/auto_critical_section.h"
#include "common/scoped_ptr.h"
#include "common/windows/guid_string.h"

using std::wstring;

namespace {

// A helper class used to collect handle operations data. Unlike
// |MiniDumpWithHandleData| it records the operations for a single handle value
// only, making it possible to include this information to a minidump.
class HandleTraceData {
 public:
  HandleTraceData();
  ~HandleTraceData();

  // Collects the handle operations data and formats a user stream to be added
  // to the minidump.
  bool CollectHandleData(HANDLE process_handle,
                         EXCEPTION_POINTERS* exception_pointers);

  // Fills the user dump entry with a pointer to the collected handle operations
  // data. Returns |true| if the entry was initialized successfully, or |false|
  // if no trace data is available.
  bool GetUserStream(MINIDUMP_USER_STREAM* user_stream);

 private:
  // Reads the exception code from the client process's address space.
  // This routine assumes that the client process's pointer width matches ours.
  static bool ReadExceptionCode(HANDLE process_handle,
                                EXCEPTION_POINTERS* exception_pointers,
                                DWORD* exception_code);

  // Stores handle operations retrieved by VerifierEnumerateResource().
  static ULONG CALLBACK RecordHandleOperations(void* resource_description,
                                               void* enumeration_context,
                                               ULONG* enumeration_level);

  // Function pointer type for VerifierEnumerateResource, which is looked up
  // dynamically.
  typedef BOOL (WINAPI* VerifierEnumerateResourceType)(
      HANDLE Process,
      ULONG Flags,
      ULONG ResourceType,
      AVRF_RESOURCE_ENUMERATE_CALLBACK ResourceCallback,
      PVOID EnumerationContext);

  // Handle to dynamically loaded verifier.dll.
  HMODULE verifier_module_;

  // Pointer to the VerifierEnumerateResource function.
  VerifierEnumerateResourceType enumerate_resource_;

  // Handle value to look for.
  ULONG64 handle_;

  // List of handle operations for |handle_|.
  std::list<AVRF_HANDLE_OPERATION> operations_;

  // Minidump stream data.
  std::vector<char> stream_;
};

HandleTraceData::HandleTraceData()
    : verifier_module_(NULL),
      enumerate_resource_(NULL),
      handle_(NULL) {
}

HandleTraceData::~HandleTraceData() {
  if (verifier_module_) {
    FreeLibrary(verifier_module_);
  }
}

bool HandleTraceData::CollectHandleData(
    HANDLE process_handle,
    EXCEPTION_POINTERS* exception_pointers) {
  DWORD exception_code;
  if (!ReadExceptionCode(process_handle, exception_pointers, &exception_code)) {
    return false;
  }

  // Verify whether the execption is STATUS_INVALID_HANDLE. Do not record any
  // handle information if it is a different exception to keep the minidump
  // small.
  if (exception_code != STATUS_INVALID_HANDLE) {
    return true;
  }

  // Load verifier!VerifierEnumerateResource() dynamically.
  verifier_module_ = LoadLibrary(TEXT("verifier.dll"));
  if (!verifier_module_) {
    return false;
  }

  enumerate_resource_ = reinterpret_cast<VerifierEnumerateResourceType>(
      GetProcAddress(verifier_module_, "VerifierEnumerateResource"));
  if (!enumerate_resource_) {
    return false;
  }

  // STATUS_INVALID_HANDLE does not provide the offending handle value in
  // the exception parameters so we have to guess. At the moment we scan
  // the handle operations trace looking for the last invalid handle operation
  // and record only the operations for that handle value.
  if (enumerate_resource_(process_handle,
                          0,
                          AvrfResourceHandleTrace,
                          &RecordHandleOperations,
                          this) != ERROR_SUCCESS) {
    // The handle tracing must have not been enabled.
    return true;
  }

  // Now that |handle_| is initialized, purge all irrelevant operations.
  std::list<AVRF_HANDLE_OPERATION>::iterator i = operations_.begin();
  std::list<AVRF_HANDLE_OPERATION>::iterator i_end = operations_.end();
  while (i != i_end) {
    if (i->Handle == handle_) {
      ++i;
    } else {
      i = operations_.erase(i);
    }
  }

  // Convert the list of recorded operations to a minidump stream.
  stream_.resize(sizeof(MINIDUMP_HANDLE_OPERATION_LIST) +
      sizeof(AVRF_HANDLE_OPERATION) * operations_.size());

  MINIDUMP_HANDLE_OPERATION_LIST* stream_data =
      reinterpret_cast<MINIDUMP_HANDLE_OPERATION_LIST*>(
          &stream_.front());
  stream_data->SizeOfHeader = sizeof(MINIDUMP_HANDLE_OPERATION_LIST);
  stream_data->SizeOfEntry = sizeof(AVRF_HANDLE_OPERATION);
  stream_data->NumberOfEntries = static_cast<ULONG32>(operations_.size());
  stream_data->Reserved = 0;
  std::copy(operations_.begin(),
            operations_.end(),
#if defined(_MSC_VER) && !defined(_LIBCPP_STD_VER)
            stdext::checked_array_iterator<AVRF_HANDLE_OPERATION*>(
                reinterpret_cast<AVRF_HANDLE_OPERATION*>(stream_data + 1),
                operations_.size())
#else
            reinterpret_cast<AVRF_HANDLE_OPERATION*>(stream_data + 1)
#endif
            );

  return true;
}

bool HandleTraceData::GetUserStream(MINIDUMP_USER_STREAM* user_stream) {
  if (stream_.empty()) {
    return false;
  } else {
    user_stream->Type = HandleOperationListStream;
    user_stream->BufferSize = static_cast<ULONG>(stream_.size());
    user_stream->Buffer = &stream_.front();
    return true;
  }
}

bool HandleTraceData::ReadExceptionCode(
    HANDLE process_handle,
    EXCEPTION_POINTERS* exception_pointers,
    DWORD* exception_code) {
  EXCEPTION_POINTERS pointers;
  if (!ReadProcessMemory(process_handle,
                         exception_pointers,
                         &pointers,
                         sizeof(pointers),
                         NULL)) {
    return false;
  }

  if (!ReadProcessMemory(process_handle,
                         pointers.ExceptionRecord,
                         exception_code,
                         sizeof(*exception_code),
                         NULL)) {
    return false;
  }

  return true;
}

ULONG CALLBACK HandleTraceData::RecordHandleOperations(
    void* resource_description,
    void* enumeration_context,
    ULONG* enumeration_level) {
  AVRF_HANDLE_OPERATION* description =
      reinterpret_cast<AVRF_HANDLE_OPERATION*>(resource_description);
  HandleTraceData* self =
      reinterpret_cast<HandleTraceData*>(enumeration_context);

  // Remember the last invalid handle operation.
  if (description->OperationType == OperationDbBADREF) {
    self->handle_ = description->Handle;
  }

  // Record all handle operations.
  self->operations_.push_back(*description);

  *enumeration_level = HeapEnumerationEverything;
  return ERROR_SUCCESS;
}

}  // namespace

namespace google_breakpad {

MinidumpGenerator::MinidumpGenerator(
    const std::wstring& dump_path,
    const HANDLE process_handle,
    const DWORD process_id,
    const DWORD thread_id,
    const DWORD requesting_thread_id,
    EXCEPTION_POINTERS* exception_pointers,
    MDRawAssertionInfo* assert_info,
    const MINIDUMP_TYPE dump_type,
    const bool is_client_pointers)
    : dbghelp_module_(NULL),
      write_dump_(NULL),
      rpcrt4_module_(NULL),
      create_uuid_(NULL),
      process_handle_(process_handle),
      process_id_(process_id),
      thread_id_(thread_id),
      requesting_thread_id_(requesting_thread_id),
      exception_pointers_(exception_pointers),
      assert_info_(assert_info),
      dump_type_(dump_type),
      is_client_pointers_(is_client_pointers),
      dump_path_(dump_path),
      uuid_generated_(false),
      dump_file_(INVALID_HANDLE_VALUE),
      full_dump_file_(INVALID_HANDLE_VALUE),
      dump_file_is_internal_(false),
      full_dump_file_is_internal_(false),
      additional_streams_(NULL),
      callback_info_(NULL) {
  uuid_ = {0};
  InitializeCriticalSection(&module_load_sync_);
  InitializeCriticalSection(&get_proc_address_sync_);
}

MinidumpGenerator::~MinidumpGenerator() {
  if (dump_file_is_internal_ && dump_file_ != INVALID_HANDLE_VALUE) {
    CloseHandle(dump_file_);
  }

  if (full_dump_file_is_internal_ && full_dump_file_ != INVALID_HANDLE_VALUE) {
    CloseHandle(full_dump_file_);
  }

  if (dbghelp_module_) {
    FreeLibrary(dbghelp_module_);
  }

  if (rpcrt4_module_) {
    FreeLibrary(rpcrt4_module_);
  }

  DeleteCriticalSection(&get_proc_address_sync_);
  DeleteCriticalSection(&module_load_sync_);
}

bool MinidumpGenerator::WriteMinidump() {
  bool full_memory_dump = (dump_type_ & MiniDumpWithFullMemory) != 0;
  if (dump_file_ == INVALID_HANDLE_VALUE ||
      (full_memory_dump && full_dump_file_ == INVALID_HANDLE_VALUE)) {
    return false;
  }

  MiniDumpWriteDumpType write_dump = GetWriteDump();
  if (!write_dump) {
    return false;
  }

  MINIDUMP_EXCEPTION_INFORMATION dump_exception_info;

  // Setup the exception information object only if it's a dump
  // due to an exception.
  if (exception_pointers_) {
    dump_exception_info.ThreadId = thread_id_;
    dump_exception_info.ExceptionPointers = exception_pointers_;
    dump_exception_info.ClientPointers = is_client_pointers_;
  }

  // Add an MDRawBreakpadInfo stream to the minidump, to provide additional
  // information about the exception handler to the Breakpad processor.
  // The information will help the processor determine which threads are
  // relevant. The Breakpad processor does not require this information but
  // can function better with Breakpad-generated dumps when it is present.
  // The native debugger is not harmed by the presence of this information.
  MDRawBreakpadInfo breakpad_info = {0};
  if (!is_client_pointers_) {
    // Set the dump thread id and requesting thread id only in case of
    // in-process dump generation.
    breakpad_info.validity = MD_BREAKPAD_INFO_VALID_DUMP_THREAD_ID |
                             MD_BREAKPAD_INFO_VALID_REQUESTING_THREAD_ID;
    breakpad_info.dump_thread_id = thread_id_;
    breakpad_info.requesting_thread_id = requesting_thread_id_;
  }

  int additional_streams_count = additional_streams_ ?
      additional_streams_->UserStreamCount : 0;
  scoped_array<MINIDUMP_USER_STREAM> user_stream_array(
      new MINIDUMP_USER_STREAM[3 + additional_streams_count]);
  user_stream_array[0].Type = MD_BREAKPAD_INFO_STREAM;
  user_stream_array[0].BufferSize = sizeof(breakpad_info);
  user_stream_array[0].Buffer = &breakpad_info;

  MINIDUMP_USER_STREAM_INFORMATION user_streams;
  user_streams.UserStreamCount = 1;
  user_streams.UserStreamArray = user_stream_array.get();

  MDRawAssertionInfo* actual_assert_info = assert_info_;
  MDRawAssertionInfo client_assert_info = {{0}};

  if (assert_info_) {
    // If the assertion info object lives in the client process,
    // read the memory of the client process.
    if (is_client_pointers_) {
      SIZE_T bytes_read = 0;
      if (!ReadProcessMemory(process_handle_,
                             assert_info_,
                             &client_assert_info,
                             sizeof(client_assert_info),
                             &bytes_read)) {
        if (dump_file_is_internal_)
          CloseHandle(dump_file_);
        if (full_dump_file_is_internal_ &&
            full_dump_file_ != INVALID_HANDLE_VALUE)
          CloseHandle(full_dump_file_);
        return false;
      }

      if (bytes_read != sizeof(client_assert_info)) {
        if (dump_file_is_internal_)
          CloseHandle(dump_file_);
        if (full_dump_file_is_internal_ &&
            full_dump_file_ != INVALID_HANDLE_VALUE)
          CloseHandle(full_dump_file_);
        return false;
      }

      actual_assert_info  = &client_assert_info;
    }

    user_stream_array[1].Type = MD_ASSERTION_INFO_STREAM;
    user_stream_array[1].BufferSize = sizeof(MDRawAssertionInfo);
    user_stream_array[1].Buffer = actual_assert_info;
    ++user_streams.UserStreamCount;
  }

  if (additional_streams_) {
    for (size_t i = 0;
         i < additional_streams_->UserStreamCount;
         i++, user_streams.UserStreamCount++) {
      user_stream_array[user_streams.UserStreamCount].Type =
          additional_streams_->UserStreamArray[i].Type;
      user_stream_array[user_streams.UserStreamCount].BufferSize =
          additional_streams_->UserStreamArray[i].BufferSize;
      user_stream_array[user_streams.UserStreamCount].Buffer =
          additional_streams_->UserStreamArray[i].Buffer;
    }
  }

  // If the process is terminated by STATUS_INVALID_HANDLE exception store
  // the trace of operations for the offending handle value. Do nothing special
  // if the client already requested the handle trace to be stored in the dump.
  HandleTraceData handle_trace_data;
  if (exception_pointers_ && (dump_type_ & MiniDumpWithHandleData) == 0) {
    if (!handle_trace_data.CollectHandleData(process_handle_,
                                             exception_pointers_)) {
      if (dump_file_is_internal_)
        CloseHandle(dump_file_);
      if (full_dump_file_is_internal_ &&
          full_dump_file_ != INVALID_HANDLE_VALUE)
        CloseHandle(full_dump_file_);
      return false;
    }
  }

  bool result_full_memory = true;
  if (full_memory_dump) {
    result_full_memory = write_dump(
        process_handle_,
        process_id_,
        full_dump_file_,
        static_cast<MINIDUMP_TYPE>((dump_type_ & (~MiniDumpNormal))
                                    | MiniDumpWithHandleData),
        exception_pointers_ ? &dump_exception_info : NULL,
        &user_streams,
        NULL) != FALSE;
  }

  // Add handle operations trace stream to the minidump if it was collected.
  if (handle_trace_data.GetUserStream(
          &user_stream_array[user_streams.UserStreamCount])) {
    ++user_streams.UserStreamCount;
  }

  bool result_minidump = write_dump(
      process_handle_,
      process_id_,
      dump_file_,
      static_cast<MINIDUMP_TYPE>((dump_type_ & (~MiniDumpWithFullMemory))
                                  | MiniDumpNormal),
      exception_pointers_ ? &dump_exception_info : NULL,
      &user_streams,
      callback_info_) != FALSE;

  return result_minidump && result_full_memory;
}

bool MinidumpGenerator::GenerateDumpFile(wstring* dump_path) {
  // The dump file was already set by handle or this function was previously
  // called.
  if (dump_file_ != INVALID_HANDLE_VALUE) {
    return false;
  }

  wstring dump_file_path;
  if (!GenerateDumpFilePath(&dump_file_path)) {
    return false;
  }

  dump_file_ = CreateFile(dump_file_path.c_str(),
                          GENERIC_WRITE,
                          0,
                          NULL,
                          CREATE_NEW,
                          FILE_ATTRIBUTE_NORMAL,
                          NULL);
  if (dump_file_ == INVALID_HANDLE_VALUE) {
    return false;
  }

  dump_file_is_internal_ = true;
  *dump_path = dump_file_path;
  return true;
}

bool MinidumpGenerator::GenerateFullDumpFile(wstring* full_dump_path) {
  // A full minidump was not requested.
  if ((dump_type_ & MiniDumpWithFullMemory) == 0) {
    return false;
  }

  // The dump file was already set by handle or this function was previously
  // called.
  if (full_dump_file_ != INVALID_HANDLE_VALUE) {
    return false;
  }

  wstring full_dump_file_path;
  if (!GenerateDumpFilePath(&full_dump_file_path)) {
    return false;
  }
  full_dump_file_path.resize(full_dump_file_path.size() - 4);  // strip .dmp
  full_dump_file_path.append(TEXT("-full.dmp"));

  full_dump_file_ = CreateFile(full_dump_file_path.c_str(),
                               GENERIC_WRITE,
                               0,
                               NULL,
                               CREATE_NEW,
                               FILE_ATTRIBUTE_NORMAL,
                               NULL);
  if (full_dump_file_ == INVALID_HANDLE_VALUE) {
    return false;
  }

  full_dump_file_is_internal_ = true;
  *full_dump_path = full_dump_file_path;
  return true;
}

HMODULE MinidumpGenerator::GetDbghelpModule() {
  AutoCriticalSection lock(&module_load_sync_);
  if (!dbghelp_module_) {
    dbghelp_module_ = LoadLibrary(TEXT("dbghelp.dll"));
  }

  return dbghelp_module_;
}

MinidumpGenerator::MiniDumpWriteDumpType MinidumpGenerator::GetWriteDump() {
  AutoCriticalSection lock(&get_proc_address_sync_);
  if (!write_dump_) {
    HMODULE module = GetDbghelpModule();
    if (module) {
      FARPROC proc = GetProcAddress(module, "MiniDumpWriteDump");
      write_dump_ = reinterpret_cast<MiniDumpWriteDumpType>(proc);
    }
  }

  return write_dump_;
}

HMODULE MinidumpGenerator::GetRpcrt4Module() {
  AutoCriticalSection lock(&module_load_sync_);
  if (!rpcrt4_module_) {
    rpcrt4_module_ = LoadLibrary(TEXT("rpcrt4.dll"));
  }

  return rpcrt4_module_;
}

MinidumpGenerator::UuidCreateType MinidumpGenerator::GetCreateUuid() {
  AutoCriticalSection lock(&module_load_sync_);
  if (!create_uuid_) {
    HMODULE module = GetRpcrt4Module();
    if (module) {
      FARPROC proc = GetProcAddress(module, "UuidCreate");
      create_uuid_ = reinterpret_cast<UuidCreateType>(proc);
    }
  }

  return create_uuid_;
}

bool MinidumpGenerator::GenerateDumpFilePath(wstring* file_path) {
  if (!uuid_generated_) {
    UuidCreateType create_uuid = GetCreateUuid();
    if (!create_uuid) {
      return false;
    }

    create_uuid(&uuid_);
    uuid_generated_ = true;
  }

  wstring id_str = GUIDString::GUIDToWString(&uuid_);

  *file_path = dump_path_ + TEXT("\\") + id_str + TEXT(".dmp");
  return true;
}

}  // namespace google_breakpad