First stab at Mac breakpad support.

chrome/app/breakpad_win.cc

Index: chrome/app/breakpad_win.cc
diff --git a/chrome/app/breakpad_win.cc b/chrome/app/breakpad_win.cc
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+// Copyright (c) 2006-2008 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.
+
+#include "chrome/app/breakpad_win.h"
+
+#include <windows.h>
+#include <tchar.h>
+#include <vector>
+
+#include "base/base_switches.h"
+#include "base/command_line.h"
+#include "base/file_util.h"
+#include "base/file_version_info.h"
+#include "base/registry.h"
+#include "base/string_util.h"
+#include "base/win_util.h"
+#include "chrome/app/google_update_client.h"
+#include "chrome/common/env_vars.h"
+#include "chrome/installer/util/install_util.h"
+#include "chrome/installer/util/google_update_settings.h"
+#include "breakpad/src/client/windows/handler/exception_handler.h"
+
+namespace {
+
+const wchar_t kGoogleUpdatePipeName[] = L"\\\\.\\pipe\\GoogleCrashServices\\";
+const wchar_t kChromePipeName[] = L"\\\\.\\pipe\\ChromeCrashServices";
+
+// This is the well known SID for the system principal.
+const wchar_t kSystemPrincipalSid[] =L"S-1-5-18";
+
+google_breakpad::ExceptionHandler* g_breakpad = NULL;
+
+std::vector<wchar_t*>* url_chunks = NULL;
+
+// Dumps the current process memory.
+extern "C" void __declspec(dllexport) __cdecl DumpProcess() {
+  if (g_breakpad)
+    g_breakpad->WriteMinidump();
+}
+
+// Returns the custom info structure based on the dll in parameter and the
+// process type.
+static google_breakpad::CustomClientInfo* custom_info = NULL;
+google_breakpad::CustomClientInfo* GetCustomInfo(const std::wstring& dll_path,
+                                                 const std::wstring& type) {
+  scoped_ptr<FileVersionInfo>
+      version_info(FileVersionInfo::CreateFileVersionInfo(dll_path));
+
+  std::wstring version, product;
+  if (version_info.get()) {
+    // Get the information from the file.
+    product = version_info->product_short_name();
+    version = version_info->product_version();
+    if (!version_info->is_official_build())
+      version.append(L"-devel");
+  } else {
+    // No version info found. Make up the values.
+     product = L"Chrome";
+     version = L"0.0.0.0-devel";
+  }
+
+  google_breakpad::CustomInfoEntry ver_entry(L"ver", version.c_str());
+  google_breakpad::CustomInfoEntry prod_entry(L"prod", product.c_str());
+  google_breakpad::CustomInfoEntry plat_entry(L"plat", L"Win32");
+  google_breakpad::CustomInfoEntry type_entry(L"ptype", type.c_str());
+
+  if (type == L"renderer") {
+    // If we're a renderer create entries for the URL. Currently we only allow
+    // each chunk to be 64 characters, which isn't enough for a URL. As a hack
+    // we create 8 entries and split the URL across the entries.
+    google_breakpad::CustomInfoEntry url1(L"url-chunk-1", L"");
+    google_breakpad::CustomInfoEntry url2(L"url-chunk-2", L"");
+    google_breakpad::CustomInfoEntry url3(L"url-chunk-3", L"");
+    google_breakpad::CustomInfoEntry url4(L"url-chunk-4", L"");
+    google_breakpad::CustomInfoEntry url5(L"url-chunk-5", L"");
+    google_breakpad::CustomInfoEntry url6(L"url-chunk-6", L"");
+    google_breakpad::CustomInfoEntry url7(L"url-chunk-7", L"");
+    google_breakpad::CustomInfoEntry url8(L"url-chunk-8", L"");
+
+    static google_breakpad::CustomInfoEntry entries[] =
+        { ver_entry, prod_entry, plat_entry, type_entry, url1, url2, url3,
+          url4, url5, url6, url7, url8 };
+
+    std::vector<wchar_t*>* tmp_url_chunks = new std::vector<wchar_t*>(8);
+    for (size_t i = 0; i < 8; ++i)
+      (*tmp_url_chunks)[i] = entries[4 + i].value;
+    url_chunks = tmp_url_chunks;
+
+    static google_breakpad::CustomClientInfo custom_info = {entries,
+                                                            arraysize(entries)};
+
+    return &custom_info;
+  }
+  static google_breakpad::CustomInfoEntry entries[] = {ver_entry,
+                                                       prod_entry,
+                                                       plat_entry,
+                                                       type_entry};
+
+  static google_breakpad::CustomClientInfo custom_info = {entries,
+                                                          arraysize(entries)};
+
+  return &custom_info;
+}
+
+// Contains the information needed by the worker thread.
+struct CrashReporterInfo {
+  google_breakpad::CustomClientInfo* custom_info;
+  std::wstring dll_path;
+  std::wstring process_type;
+};
+
+// This callback is executed when the browser process has crashed, after
+// the crash dump has been created. We need to minimize the amount of work
+// done here since we have potentially corrupted process. Our job is to
+// spawn another instance of chrome which will show a 'chrome has crashed'
+// dialog. This code needs to live in the exe and thus has no access to
+// facilities such as the i18n helpers.
+bool DumpDoneCallback(const wchar_t*, const wchar_t*, void*,
+                      EXCEPTION_POINTERS* ex_info,
+                      MDRawAssertionInfo*, bool) {
+  // We set CHROME_CRASHED env var. If the CHROME_RESTART is present.
+  // This signals the child process to show the 'chrome has crashed' dialog.
+  if (!::GetEnvironmentVariableW(env_vars::kRestartInfo, NULL, 0))
+    return true;
+  ::SetEnvironmentVariableW(env_vars::kShowRestart, L"1");
+  // Now we just start chrome browser with the same command line.
+  STARTUPINFOW si = {sizeof(si)};
+  PROCESS_INFORMATION pi;
+  if (::CreateProcessW(NULL, ::GetCommandLineW(), NULL, NULL, FALSE,
+                       CREATE_UNICODE_ENVIRONMENT, NULL, NULL, &si, &pi)) {
+    ::CloseHandle(pi.hProcess);
+    ::CloseHandle(pi.hThread);
+  }
+  // After this return we will be terminated. The actual return value is
+  // not used at all.
+  return true;
+}
+
+// Previous unhandled filter. Will be called if not null when we
+// intercept a crash.
+LPTOP_LEVEL_EXCEPTION_FILTER previous_filter = NULL;
+
+// Exception filter used when breakpad is not enabled. We just display
+// the "Do you want to restart" message and then we call the previous filter.
+long WINAPI ChromeExceptionFilter(EXCEPTION_POINTERS* info) {
+  DumpDoneCallback(NULL, NULL, NULL, info, NULL, false);
+
+  if (previous_filter)
+    return previous_filter(info);
+
+  return EXCEPTION_EXECUTE_HANDLER;
+}
+
+extern "C" void __declspec(dllexport) __cdecl SetActiveRendererURL(
+    const wchar_t* url_cstring) {
+  DCHECK(url_cstring);
+  if (!url_chunks)
+    return;
+
+  std::wstring url(url_cstring);
+  size_t num_chunks = url_chunks->size();
+  size_t chunk_index = 0;
+  size_t url_size = url.size();
+
+  // Split the url across all the chunks.
+  for (size_t url_offset = 0;
+       chunk_index < num_chunks && url_offset < url_size; ++chunk_index) {
+    size_t current_chunk_size = std::min(url_size - url_offset,
+        static_cast<size_t>(
+            google_breakpad::CustomInfoEntry::kValueMaxLength - 1));
+    url._Copy_s((*url_chunks)[chunk_index],
+                google_breakpad::CustomInfoEntry::kValueMaxLength,
+                current_chunk_size, url_offset);
+    (*url_chunks)[chunk_index][current_chunk_size] = L'\0';
+    url_offset += current_chunk_size;
+  }
+
+  // And null terminate any unneeded chunks.
+  for (; chunk_index < num_chunks; ++chunk_index)
+    (*url_chunks)[chunk_index][0] = L'\0';
+}
+
+}  // namespace
+
+// This function is executed by the child process that DumpDoneCallback()
+// spawned and basically just shows the 'chrome has crashed' dialog if
+// the CHROME_CRASHED environment variable is present.
+bool ShowRestartDialogIfCrashed(bool* exit_now) {
+  if (!::GetEnvironmentVariableW(env_vars::kShowRestart, NULL, 0))
+    return false;
+
+  DWORD len = ::GetEnvironmentVariableW(env_vars::kRestartInfo, NULL, 0);
+  if (!len)
+    return true;
+
+  wchar_t* restart_data = new wchar_t[len + 1];
+  ::GetEnvironmentVariableW(env_vars::kRestartInfo, restart_data, len);
+  restart_data[len] = 0;
+  // The CHROME_RESTART var contains the dialog strings separated by '|'.
+  // See PrepareRestartOnCrashEnviroment() function for details.
+  std::vector<std::wstring> dlg_strings;
+  SplitString(restart_data, L'|', &dlg_strings);
+  delete[] restart_data;
+  if (dlg_strings.size() < 3)
+    return true;
+
+  // If the UI layout is right-to-left, we need to pass the appropriate MB_XXX
+  // flags so that an RTL message box is displayed.
+  UINT flags = MB_OKCANCEL | MB_ICONWARNING;
+  if (dlg_strings[2] == env_vars::kRtlLocale)
+    flags |= MB_RIGHT | MB_RTLREADING;
+
+  // Show the dialog now. It is ok if another chrome is started by the
+  // user since we have not initialized the databases.
+  *exit_now = (IDOK != ::MessageBoxW(NULL, dlg_strings[1].c_str(),
+                                     dlg_strings[0].c_str(), flags));
+  return true;
+}
+
+static DWORD __stdcall InitCrashReporterThread(void* param) {
+  CrashReporterInfo* info = reinterpret_cast<CrashReporterInfo*>(param);
+
+  // GetCustomInfo can take a few milliseconds to get the file information, so
+  // we do it here so it can run in a separate thread.
+  info->custom_info = GetCustomInfo(info->dll_path, info->process_type);
+
+  const CommandLine& command = *CommandLine::ForCurrentProcess();
+  bool full_dump = command.HasSwitch(switches::kFullMemoryCrashReport);
+  bool use_crash_service = command.HasSwitch(switches::kNoErrorDialogs) ||
+                           GetEnvironmentVariable(L"CHROME_HEADLESS", NULL, 0);
+
+  google_breakpad::ExceptionHandler::MinidumpCallback callback = NULL;
+
+  if (info->process_type == L"browser") {
+    // We install the post-dump callback only for the browser process. It
+    // spawns a new browser process.
+    callback = &DumpDoneCallback;
+  }
+
+  std::wstring pipe_name;
+  if (use_crash_service) {
+    // Crash reporting is done by crash_service.exe.
+    pipe_name = kChromePipeName;
+  } else {
+    // We want to use the Google Update crash reporting. We need to check if the
+    // user allows it first.
+    if (!GoogleUpdateSettings::GetCollectStatsConsent()) {
+      // The user did not allow Google Update to send crashes, we need to use
+      // our default crash handler instead, but only for the browser process.
+      if (callback)
+        InitDefaultCrashCallback();
+      return 0;
+    }
+
+    // Build the pipe name. It can be either:
+    // System-wide install: "NamedPipe\GoogleCrashServices\S-1-5-18"
+    // Per-user install: "NamedPipe\GoogleCrashServices\<user SID>"
+    std::wstring user_sid;
+    if (InstallUtil::IsPerUserInstall(info->dll_path.c_str())) {
+      if (!win_util::GetUserSidString(&user_sid)) {
+        delete info;
+        return -1;
+      }
+    } else {
+      user_sid = kSystemPrincipalSid;
+    }
+
+    pipe_name = kGoogleUpdatePipeName;
+    pipe_name += user_sid;
+  }
+
+  // Get the alternate dump directory. We use the temp path.
+  wchar_t temp_dir[MAX_PATH] = {0};
+  ::GetTempPathW(MAX_PATH, temp_dir);
+
+  MINIDUMP_TYPE dump_type = full_dump ? MiniDumpWithFullMemory : MiniDumpNormal;
+
+  g_breakpad = new google_breakpad::ExceptionHandler(temp_dir, NULL, callback,
+                   NULL, google_breakpad::ExceptionHandler::HANDLER_ALL,
+                   dump_type, pipe_name.c_str(), info->custom_info);
+
+  if (!g_breakpad->IsOutOfProcess()) {
+    // The out-of-process handler is unavailable.
+    ::SetEnvironmentVariable(env_vars::kNoOOBreakpad,
+                             info->process_type.c_str());
+  } else {
+    // Tells breakpad to handle breakpoint and single step exceptions.
+    // This might break JIT debuggers, but at least it will always
+    // generate a crashdump for these exceptions.
+    g_breakpad->set_handle_debug_exceptions(true);
+  }
+
+  delete info;
+  return 0;
+}
+
+void InitDefaultCrashCallback() {
+  previous_filter = SetUnhandledExceptionFilter(ChromeExceptionFilter);
+}
+
+void InitCrashReporterWithDllPath(const std::wstring& dll_path) {
+  const CommandLine& command = *CommandLine::ForCurrentProcess();
+  if (!command.HasSwitch(switches::kDisableBreakpad)) {
+    // Disable the message box for assertions.
+    _CrtSetReportMode(_CRT_ASSERT, 0);
+
+    // Query the custom_info now because if we do it in the thread it's going to
+    // fail in the sandbox. The thread will delete this object.
+    CrashReporterInfo* info = new CrashReporterInfo;
+    info->process_type = command.GetSwitchValue(switches::kProcessType);
+    if (info->process_type.empty())
+      info->process_type = L"browser";
+
+    info->dll_path = dll_path;
+
+    // If this is not the browser, we can't be sure that we will be able to
+    // initialize the crash_handler in another thread, so we run it right away.
+    // This is important to keep the thread for the browser process because
+    // it may take some times to initialize the crash_service process.  We use
+    // the Windows worker pool to make better reuse of the thread.
+    if (info->process_type != L"browser") {
+      InitCrashReporterThread(info);
+    } else {
+      if (QueueUserWorkItem(
+              &InitCrashReporterThread, info, WT_EXECUTELONGFUNCTION) == 0) {
+        // We failed to queue to the worker pool, initialize in this thread.
+        InitCrashReporterThread(info);
+      }
+    }
+  }
+}