remoting/base/breakpad_win.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 // This module contains the necessary code to register the Breakpad exception
   6 // handler. This implementation is based on Chrome crash reporting code. See:
   7 //   - src/components/crash/app/breakpad_win.cc
   8 //   - src/chrome/installer/setup/setup_main.cc
   9
  10 #include "remoting/base/breakpad.h"
  11
  12 #include <windows.h>
  13 #include <string>
  14
  15 #include "base/atomicops.h"
  16 #include "base/file_version_info.h"
  17 #include "base/lazy_instance.h"
  18 #include "base/logging.h"
  19 #include "base/memory/scoped_ptr.h"
  20 #include "base/process/memory.h"
  21 #include "base/strings/utf_string_conversions.h"
  22 #include "base/win/wrapped_window_proc.h"
  23 #include "breakpad/src/client/windows/handler/exception_handler.h"
  24
  25 namespace remoting {
  26 void InitializeCrashReportingForTest(const wchar_t* pipe_name);
  27 }  // namespace remoting
  28
  29 namespace {
  30
  31 const wchar_t kBreakpadProductName[] = L"Chromoting";
  32 const wchar_t kBreakpadVersionEntry[] = L"ver";
  33 const wchar_t kBreakpadVersionDefault[] = L"0.1.0.0";
  34 const wchar_t kBreakpadProdEntry[] = L"prod";
  35 const wchar_t kBreakpadPlatformEntry[] = L"plat";
  36 const wchar_t kBreakpadPlatformWin32[] = L"Win32";
  37
  38 // The protocol for connecting to the out-of-process Breakpad crash
  39 // reporter is different for x86-32 and x86-64: the message sizes
  40 // are different because the message struct contains a pointer.  As
  41 // a result, there are two different named pipes to connect to.  The
  42 // 64-bit one is distinguished with an "-x64" suffix.
  43 #if defined(_WIN64)
  44 const wchar_t kGoogleUpdatePipeName[] =
  45     L"\\\\.\\pipe\\GoogleCrashServices\\S-1-5-18-x64";
  46 #else
  47 const wchar_t kGoogleUpdatePipeName[] =
  48     L"\\\\.\\pipe\\GoogleCrashServices\\S-1-5-18";
  49 #endif
  50
  51 using base::subtle::AtomicWord;
  52 using base::subtle::NoBarrier_CompareAndSwap;
  53
  54 class BreakpadWin {
  55  public:
  56   BreakpadWin();
  57   ~BreakpadWin();
  58
  59   static BreakpadWin* GetInstance();
  60
  61  private:
  62   // Returns the Custom information to be used for crash reporting.
  63   google_breakpad::CustomClientInfo* GetCustomInfo();
  64
  65   // This callback is executed when the process has crashed and *before*
  66   // the crash dump is created. To prevent duplicate crash reports we
  67   // make every thread calling this method, except the very first one,
  68   // go to sleep.
  69   static bool OnExceptionCallback(void* context,
  70                                   EXCEPTION_POINTERS* exinfo,
  71                                   MDRawAssertionInfo* assertion);
  72
  73   // Crashes the process after generating a dump for the provided exception.
  74   // Note that the crash reporter should be initialized before calling this
  75   // function for it to do anything.
  76   static int OnWindowProcedureException(EXCEPTION_POINTERS* exinfo);
  77
  78   // Breakpad's exception handler.
  79   scoped_ptr<google_breakpad::ExceptionHandler> breakpad_;
  80
  81   // This flag is used to indicate that an exception is already being handled.
  82   volatile AtomicWord handling_exception_;
  83
  84   // The testing hook below allows overriding the crash server pipe name.
  85   static const wchar_t* pipe_name_;
  86
  87   friend void ::remoting::InitializeCrashReportingForTest(const wchar_t*);
  88
  89   DISALLOW_COPY_AND_ASSIGN(BreakpadWin);
  90 };
  91
  92 // |LazyInstance| is used to guarantee that the exception handler will be
  93 // initialized exactly once.
  94 // N.B. LazyInstance does not allow this to be a static member of the class.
  95 static base::LazyInstance<BreakpadWin>::Leaky g_instance =
  96     LAZY_INSTANCE_INITIALIZER;
  97
  98 const wchar_t* BreakpadWin::pipe_name_ = kGoogleUpdatePipeName;
  99
 100 BreakpadWin::BreakpadWin() : handling_exception_(0) {
 101   // Disable the message box for assertions.
 102   _CrtSetReportMode(_CRT_ASSERT, 0);
 103
 104   // Get the alternate dump directory. We use the temp path.
 105   // N.B. We don't use base::GetTempDir() here to avoid running more code then
 106   //      necessary before crashes can be properly reported.
 107   wchar_t temp_directory[MAX_PATH + 1] = { 0 };
 108   DWORD length = GetTempPath(MAX_PATH, temp_directory);
 109   if (length == 0)
 110     return;
 111
 112   // Minidump with stacks, PEB, TEBs and unloaded module list.
 113   MINIDUMP_TYPE dump_type = static_cast<MINIDUMP_TYPE>(
 114       MiniDumpWithProcessThreadData |
 115       MiniDumpWithUnloadedModules);
 116   breakpad_.reset(
 117       new google_breakpad::ExceptionHandler(
 118           temp_directory, &OnExceptionCallback, NULL, NULL,
 119           google_breakpad::ExceptionHandler::HANDLER_ALL, dump_type,
 120           pipe_name_, GetCustomInfo()));
 121
 122   if (breakpad_->IsOutOfProcess()) {
 123     // Tells breakpad to handle breakpoint and single step exceptions.
 124     breakpad_->set_handle_debug_exceptions(true);
 125   }
 126
 127   // Catch exceptions thrown from a window procedure.
 128   base::win::WinProcExceptionFilter exception_filter =
 129       base::win::SetWinProcExceptionFilter(&OnWindowProcedureException);
 130   CHECK(!exception_filter);
 131 }
 132
 133 BreakpadWin::~BreakpadWin() {
 134   // This object should be leaked so that crashes occurred during the process
 135   // shutdown will be caught.
 136   NOTREACHED();
 137 }
 138
 139 // static
 140 BreakpadWin* BreakpadWin::GetInstance() {
 141   return &g_instance.Get();
 142 }
 143
 144 // Returns the Custom information to be used for crash reporting.
 145 google_breakpad::CustomClientInfo* BreakpadWin::GetCustomInfo() {
 146   HMODULE binary = base::GetModuleFromAddress(
 147       reinterpret_cast<void*>(&remoting::InitializeCrashReporting));
 148   scoped_ptr<FileVersionInfo> version_info(
 149       FileVersionInfo::CreateFileVersionInfoForModule(binary));
 150
 151   static wchar_t version[64];
 152   if (version_info.get()) {
 153     wcscpy_s(version, version_info->product_version().c_str());
 154   } else {
 155     wcscpy_s(version, kBreakpadVersionDefault);
 156   }
 157
 158   static google_breakpad::CustomInfoEntry ver_entry(
 159       kBreakpadVersionEntry, version);
 160   static google_breakpad::CustomInfoEntry prod_entry(
 161       kBreakpadProdEntry, kBreakpadProductName);
 162   static google_breakpad::CustomInfoEntry plat_entry(
 163       kBreakpadPlatformEntry, kBreakpadPlatformWin32);
 164   static google_breakpad::CustomInfoEntry entries[] = {
 165       ver_entry, prod_entry, plat_entry  };
 166   static google_breakpad::CustomClientInfo custom_info = {
 167       entries, arraysize(entries) };
 168   return &custom_info;
 169 }
 170
 171 // static
 172 bool BreakpadWin::OnExceptionCallback(void* /* context */,
 173                                       EXCEPTION_POINTERS* /* exinfo */,
 174                                       MDRawAssertionInfo* /* assertion */) {
 175   BreakpadWin* self = BreakpadWin::GetInstance();
 176   if (NoBarrier_CompareAndSwap(&self->handling_exception_, 0, 1) != 0) {
 177     // Capture every thread except the first one in the sleep. We don't
 178     // want multiple threads to concurrently report exceptions.
 179     ::Sleep(INFINITE);
 180   }
 181   return true;
 182 }
 183
 184 // static
 185 int BreakpadWin::OnWindowProcedureException(EXCEPTION_POINTERS* exinfo) {
 186   BreakpadWin* self = BreakpadWin::GetInstance();
 187   if (self->breakpad_.get() != NULL) {
 188     self->breakpad_->WriteMinidumpForException(exinfo);
 189     TerminateProcess(GetCurrentProcess(),
 190                      exinfo->ExceptionRecord->ExceptionCode);
 191   }
 192   return EXCEPTION_CONTINUE_SEARCH;
 193 }
 194
 195 }  // namespace
 196
 197 namespace remoting {
 198
 199 void InitializeCrashReporting() {
 200   // Touch the object to make sure it is initialized.
 201   BreakpadWin::GetInstance();
 202 }
 203
 204 void InitializeCrashReportingForTest(const wchar_t* pipe_name) {
 205   BreakpadWin::pipe_name_ = pipe_name;
 206   InitializeCrashReporting();
 207 }
 208
 209 }  // namespace remoting