Switch chrome_elf exception handling from breakpad to crashpad

chrome_elf/breakpad.cc

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// This module contains the necessary code to register the Breakpad exception
-// handler. This implementation is based on Chrome's crash reporting code.
-
-#include "chrome_elf/breakpad.h"
-
-#include <sddl.h>
-
-#include "base/macros.h"
-#include "base/strings/string16.h"
-#include "breakpad/src/client/windows/handler/exception_handler.h"
-#include "chrome/common/chrome_version.h"
-#include "chrome/install_static/install_util.h"
-
-google_breakpad::ExceptionHandler* g_elf_breakpad = NULL;
-
-namespace {
-
-const wchar_t kBreakpadProductName[] = L"Chrome";
-const wchar_t kBreakpadVersionEntry[] = L"ver";
-const wchar_t kBreakpadProdEntry[] = L"prod";
-const wchar_t kBreakpadPlatformEntry[] = L"plat";
-const wchar_t kBreakpadPlatformWin32[] = L"Win32";
-const wchar_t kBreakpadProcessEntry[] = L"ptype";
-const wchar_t kBreakpadChannelEntry[] = L"channel";
-
-// The protocol for connecting to the out-of-process Breakpad crash
-// reporter is different for x86-32 and x86-64: the message sizes
-// are different because the message struct contains a pointer.  As
-// a result, there are two different named pipes to connect to.  The
-// 64-bit one is distinguished with an "-x64" suffix.
-const wchar_t kChromePipeName[] = L"\\\\.\\pipe\\ChromeCrashServices\\";
-const wchar_t kGoogleUpdatePipeName[] = L"\\\\.\\pipe\\GoogleCrashServices\\";
-const wchar_t kSystemPrincipalSid[] = L"S-1-5-18";
-
-const wchar_t kNoErrorDialogs[] = L"noerrdialogs";
-
-google_breakpad::CustomClientInfo* GetCustomInfo() {
-  base::string16 process =
-      install_static::IsNonBrowserProcess() ? L"renderer" : L"browser";
-
-  wchar_t exe_path[MAX_PATH] = {};
-  base::string16 channel;
-  if (GetModuleFileName(NULL, exe_path, arraysize(exe_path)) &&
-      install_static::IsSxSChrome(exe_path)) {
-    channel = L"canary";
-  }
-
-  static google_breakpad::CustomInfoEntry ver_entry(
-      kBreakpadVersionEntry, TEXT(CHROME_VERSION_STRING));
-  static google_breakpad::CustomInfoEntry prod_entry(
-      kBreakpadProdEntry, kBreakpadProductName);
-  static google_breakpad::CustomInfoEntry plat_entry(
-      kBreakpadPlatformEntry, kBreakpadPlatformWin32);
-  static google_breakpad::CustomInfoEntry proc_entry(
-      kBreakpadProcessEntry, process.c_str());
-  static google_breakpad::CustomInfoEntry channel_entry(
-      kBreakpadChannelEntry, channel.c_str());
-  static google_breakpad::CustomInfoEntry entries[] = {
-      ver_entry, prod_entry, plat_entry, proc_entry, channel_entry};
-  static google_breakpad::CustomClientInfo custom_info = {
-      entries, arraysize(entries) };
-  return &custom_info;
-}
-
-base::string16 GetUserSidString() {
-  // Get the current token.
-  HANDLE token = NULL;
-  base::string16 user_sid;
-  if (!::OpenProcessToken(::GetCurrentProcess(), TOKEN_QUERY, &token))
-    return user_sid;
-
-  DWORD size = sizeof(TOKEN_USER) + SECURITY_MAX_SID_SIZE;
-  BYTE user_bytes[sizeof(TOKEN_USER) + SECURITY_MAX_SID_SIZE] = {};
-  TOKEN_USER* user = reinterpret_cast<TOKEN_USER*>(user_bytes);
-
-  wchar_t* sid_string = NULL;
-  if (::GetTokenInformation(token, TokenUser, user, size, &size) &&
-      user->User.Sid &&
-      ::ConvertSidToStringSid(user->User.Sid, &sid_string)) {
-    user_sid = sid_string;
-    ::LocalFree(sid_string);
-  }
-
-  CloseHandle(token);
-  return user_sid;
-}
-
-bool IsHeadless() {
-  DWORD ret = ::GetEnvironmentVariable(L"CHROME_HEADLESS", NULL, 0);
-  if (ret != 0)
-    return true;
-
-  wchar_t* command_line = ::GetCommandLine();
-
-  // Note: Since this is a pure substring search rather than a check for a
-  // switch, there is a small chance that this code will match things that the
-  // Chrome code (which executes a similar check) does not. However, as long as
-  // no other switches contain the string "noerrdialogs", it should not be an
-  // issue.
-  return (command_line && wcsstr(command_line, kNoErrorDialogs));
-}
-
-}  // namespace
-
-int GenerateCrashDump(EXCEPTION_POINTERS* exinfo) {
-  DWORD code = exinfo->ExceptionRecord->ExceptionCode;
-  if (code == EXCEPTION_BREAKPOINT || code == EXCEPTION_SINGLE_STEP)
-    return EXCEPTION_CONTINUE_SEARCH;
-
-  if (g_elf_breakpad != NULL)
-    g_elf_breakpad->WriteMinidumpForException(exinfo);
-  return EXCEPTION_CONTINUE_SEARCH;
-}
-
-void InitializeCrashReporting() {
-  wchar_t exe_path[MAX_PATH] = {};
-  if (!::GetModuleFileName(NULL, exe_path, arraysize(exe_path)))
-    return;
-
-  // Disable the message box for assertions.
-  _CrtSetReportMode(_CRT_ASSERT, 0);
-
-  // Get the alternate dump directory. We use the temp path.
-  // N.B. We don't use base::GetTempDir() here to avoid running more code then
-  //      necessary before crashes can be properly reported.
-  wchar_t temp_directory[MAX_PATH + 1] = {};
-  DWORD length = GetTempPath(MAX_PATH, temp_directory);
-  if (length == 0)
-    return;
-
-  // Minidump with stacks, PEB, TEBs and unloaded module list.
-  MINIDUMP_TYPE dump_type = static_cast<MINIDUMP_TYPE>(
-      MiniDumpWithProcessThreadData |  // Get PEB and TEB.
-      MiniDumpWithUnloadedModules |  // Get unloaded modules when available.
-      MiniDumpWithIndirectlyReferencedMemory);  // Get memory referenced by
-                                                // stack.
-
-#if defined(GOOGLE_CHROME_BUILD) && defined(OFFICIAL_BUILD)
-  bool is_official_chrome_build = true;
-#else
-  bool is_official_chrome_build = false;
-#endif
-
-  base::string16 pipe_name;
-
-  bool enabled_by_policy = false;
-  bool use_policy =
-      install_static::ReportingIsEnforcedByPolicy(&enabled_by_policy);
-
-  if (!use_policy && IsHeadless()) {
-    pipe_name = kChromePipeName;
-  } else if (use_policy ? enabled_by_policy
-                        : (is_official_chrome_build &&
-                           install_static::GetCollectStatsConsent())) {
-    // Build the pipe name. It can be one of:
-    // 32-bit system: \\.\pipe\GoogleCrashServices\S-1-5-18
-    // 32-bit user: \\.\pipe\GoogleCrashServices\<user SID>
-    // 64-bit system: \\.\pipe\GoogleCrashServices\S-1-5-18-x64
-    // 64-bit user: \\.\pipe\GoogleCrashServices\<user SID>-x64
-    base::string16 user_sid = install_static::IsSystemInstall(exe_path)
-                                  ? kSystemPrincipalSid
-                                  : GetUserSidString();
-    if (user_sid.empty())
-      return;
-
-    pipe_name = kGoogleUpdatePipeName;
-    pipe_name += user_sid;
-
-#if defined(_WIN64)
-    pipe_name += L"-x64";
-#endif
-  } else {
-    // Either this is a Chromium build, reporting is disabled by policy or the
-    // user has not given consent.
-    return;
-  }
-
-  g_elf_breakpad = new google_breakpad::ExceptionHandler(
-      temp_directory,
-      NULL,
-      NULL,
-      NULL,
-      google_breakpad::ExceptionHandler::HANDLER_ALL,
-      dump_type,
-      pipe_name.c_str(),
-      GetCustomInfo());
-
-  if (g_elf_breakpad->IsOutOfProcess()) {
-    // Tells breakpad to handle breakpoint and single step exceptions.
-    g_elf_breakpad->set_handle_debug_exceptions(true);
-  }
-}