1    :  // Copyright 2015 Google Inc. All Rights Reserved.
   2    :  //
   3    :  // Licensed under the Apache License, Version 2.0 (the "License");
   4    :  // you may not use this file except in compliance with the License.
   5    :  // You may obtain a copy of the License at
   6    :  //
   7    :  //     http://www.apache.org/licenses/LICENSE-2.0
   8    :  //
   9    :  // Unless required by applicable law or agreed to in writing, software
  10    :  // distributed under the License is distributed on an "AS IS" BASIS,
  11    :  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12    :  // See the License for the specific language governing permissions and
  13    :  // limitations under the License.
  14    :  
  15    :  // This file exports ReportCrashWithProtobuf, which is an optional API that
  16    :  // instrumented processes may export (from their executable module) in order to
  17    :  // handle SyzyASAN reports. The exit code from this method is used to verify
  18    :  // SyzyASAN functionality in instrument_integration_test.cc .
  19    :  
  20    :  #include <windows.h>
  21    :  
  22    :  #include "base/environment.h"
  23    :  #include "syzygy/crashdata/crashdata.h"
  24    :  #include "syzygy/crashdata/json.h"
  25    :  
  26  E :  void Exit(UINT code) {
  27  E :    ::TerminateProcess(::GetCurrentProcess(), code);
  28  E :  }
  29    :  
  30    :  extern "C" void __declspec(dllexport)
  31    :      ReportCrashWithProtobuf(EXCEPTION_POINTERS* info,
  32    :                              const char* protobuf,
  33  E :                              size_t protobuf_length) {
  34    :    // Bail if there was no protobuf.
  35  E :    if (protobuf == nullptr || protobuf_length == 0)
  36  i :      Exit(97);
  37    :  
  38    :    // Parse the protobuf and bail if that fails.
  39  E :    crashdata::Value value;
  40  E :    if (!value.ParseFromArray(protobuf, protobuf_length))
  41  i :      ::Exit(97);
  42    :  
  43    :    // A useful debugging hack.
  44  E :    scoped_ptr<base::Environment> env(base::Environment::Create());
  45  E :    if (env->HasVar("SYZYGY_ASAN_DUMP_PROTOBUF_ON_CRASH")) {
  46  i :      std::string json;
  47  i :      crashdata::ToJson(true, &value, &json);
  48  i :      ::printf("%s", json.c_str());
  49  i :    }
  50    :  
  51  E :    Exit(98);
  52  E :  }