Preparation patch for moving the chrome crashpad integration into chrome_elf.

chrome_elf/chrome_elf_util.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.
-
-#include "chrome_elf/chrome_elf_util.h"
-
-#include <assert.h>
-#include <windows.h>
-#include <stddef.h>
-
-#include "base/macros.h"
-#include "base/strings/string16.h"
-
-ProcessType g_process_type = ProcessType::UNINITIALIZED;
-
-namespace {
-
-const wchar_t kRegPathClientState[] = L"Software\\Google\\Update\\ClientState";
-const wchar_t kRegPathClientStateMedium[] =
-    L"Software\\Google\\Update\\ClientStateMedium";
-#if defined(GOOGLE_CHROME_BUILD)
-const wchar_t kRegPathChromePolicy[] = L"SOFTWARE\\Policies\\Google\\Chrome";
-#else
-const wchar_t kRegPathChromePolicy[] = L"SOFTWARE\\Policies\\Chromium";
-#endif  // defined(GOOGLE_CHROME_BUILD)
-
-const wchar_t kRegValueUsageStats[] = L"usagestats";
-const wchar_t kUninstallArgumentsField[] = L"UninstallArguments";
-const wchar_t kMetricsReportingEnabled[] =L"MetricsReportingEnabled";
-
-const wchar_t kAppGuidCanary[] =
-    L"{4ea16ac7-fd5a-47c3-875b-dbf4a2008c20}";
-const wchar_t kAppGuidGoogleChrome[] =
-    L"{8A69D345-D564-463c-AFF1-A69D9E530F96}";
-const wchar_t kAppGuidGoogleBinaries[] =
-    L"{4DC8B4CA-1BDA-483e-B5FA-D3C12E15B62D}";
-
-bool ReadKeyValueString(bool system_install, const wchar_t* key_path,
-                        const wchar_t* guid, const wchar_t* value_to_read,
-                        base::string16* value_out) {
-  HKEY key = NULL;
-  value_out->clear();
-
-  base::string16 full_key_path(key_path);
-  full_key_path.append(1, L'\\');
-  full_key_path.append(guid);
-
-  if (::RegOpenKeyEx(system_install ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER,
-                     full_key_path.c_str(), 0,
-                     KEY_QUERY_VALUE | KEY_WOW64_32KEY, &key) !=
-                     ERROR_SUCCESS) {
-    return false;
-  }
-
-  const size_t kMaxStringLength = 1024;
-  wchar_t raw_value[kMaxStringLength] = {};
-  DWORD size = sizeof(raw_value);
-  DWORD type = REG_SZ;
-  LONG result = ::RegQueryValueEx(key, value_to_read, 0, &type,
-                                  reinterpret_cast<LPBYTE>(raw_value), &size);
-
-  if (result == ERROR_SUCCESS) {
-    if (type != REG_SZ || (size & 1) != 0) {
-      result = ERROR_NOT_SUPPORTED;
-    } else if (size == 0) {
-      *raw_value = L'\0';
-    } else if (raw_value[size / sizeof(wchar_t) - 1] != L'\0') {
-      if ((size / sizeof(wchar_t)) < kMaxStringLength)
-        raw_value[size / sizeof(wchar_t)] = L'\0';
-      else
-        result = ERROR_MORE_DATA;
-    }
-  }
-
-  if (result == ERROR_SUCCESS)
-    *value_out = raw_value;
-
-  ::RegCloseKey(key);
-
-  return result == ERROR_SUCCESS;
-}
-
-bool ReadKeyValueDW(bool system_install, const wchar_t* key_path,
-                    base::string16 guid, const wchar_t* value_to_read,
-                    DWORD* value_out) {
-  HKEY key = NULL;
-  *value_out = 0;
-
-  base::string16 full_key_path(key_path);
-  full_key_path.append(1, L'\\');
-  full_key_path.append(guid);
-
-  if (::RegOpenKeyEx(system_install ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER,
-                     full_key_path.c_str(), 0,
-                     KEY_QUERY_VALUE | KEY_WOW64_32KEY, &key) !=
-                     ERROR_SUCCESS) {
-    return false;
-  }
-
-  DWORD size = sizeof(*value_out);
-  DWORD type = REG_DWORD;
-  LONG result = ::RegQueryValueEx(key, value_to_read, 0, &type,
-                                  reinterpret_cast<BYTE*>(value_out), &size);
-
-  ::RegCloseKey(key);
-
-  return result == ERROR_SUCCESS && size == sizeof(*value_out);
-}
-
-}  // namespace
-
-bool IsCanary(const wchar_t* exe_path) {
-  return wcsstr(exe_path, L"Chrome SxS\\Application") != NULL;
-}
-
-bool IsSystemInstall(const wchar_t* exe_path) {
-  wchar_t program_dir[MAX_PATH] = {};
-  DWORD ret = ::GetEnvironmentVariable(L"PROGRAMFILES", program_dir,
-                                       arraysize(program_dir));
-  if (ret && ret < MAX_PATH && !wcsncmp(exe_path, program_dir, ret))
-    return true;
-
-  ret = ::GetEnvironmentVariable(L"PROGRAMFILES(X86)", program_dir,
-                                 arraysize(program_dir));
-  if (ret && ret < MAX_PATH && !wcsncmp(exe_path, program_dir, ret))
-    return true;
-
-  return false;
-}
-
-bool IsMultiInstall(bool is_system_install) {
-  base::string16 args;
-  if (!ReadKeyValueString(is_system_install, kRegPathClientState,
-                          kAppGuidGoogleChrome, kUninstallArgumentsField,
-                          &args)) {
-    return false;
-  }
-  return args.find(L"--multi-install") != base::string16::npos;
-}
-
-bool AreUsageStatsEnabled(const wchar_t* exe_path) {
-  bool enabled = true;
-  bool controlled_by_policy = ReportingIsEnforcedByPolicy(&enabled);
-
-  if (controlled_by_policy && !enabled)
-    return false;
-
-  bool system_install = IsSystemInstall(exe_path);
-  base::string16 app_guid;
-
-  if (IsCanary(exe_path)) {
-    app_guid = kAppGuidCanary;
-  } else {
-    app_guid = IsMultiInstall(system_install) ? kAppGuidGoogleBinaries :
-                                                kAppGuidGoogleChrome;
-  }
-
-  DWORD out_value = 0;
-  if (system_install &&
-      ReadKeyValueDW(system_install, kRegPathClientStateMedium, app_guid,
-                     kRegValueUsageStats, &out_value)) {
-    return out_value == 1;
-  }
-
-  return ReadKeyValueDW(system_install, kRegPathClientState, app_guid,
-                        kRegValueUsageStats, &out_value) && out_value == 1;
-}
-
-bool ReportingIsEnforcedByPolicy(bool* breakpad_enabled) {
-  HKEY key = NULL;
-  DWORD value = 0;
-  BYTE* value_bytes = reinterpret_cast<BYTE*>(&value);
-  DWORD size = sizeof(value);
-  DWORD type = REG_DWORD;
-
-  if (::RegOpenKeyEx(HKEY_LOCAL_MACHINE, kRegPathChromePolicy, 0,
-                     KEY_QUERY_VALUE, &key) == ERROR_SUCCESS) {
-    if (::RegQueryValueEx(key, kMetricsReportingEnabled, 0, &type,
-                          value_bytes, &size) == ERROR_SUCCESS) {
-      *breakpad_enabled = value != 0;
-    }
-    ::RegCloseKey(key);
-    return size == sizeof(value);
-  }
-
-  if (::RegOpenKeyEx(HKEY_CURRENT_USER, kRegPathChromePolicy, 0,
-                     KEY_QUERY_VALUE, &key) == ERROR_SUCCESS) {
-    if (::RegQueryValueEx(key, kMetricsReportingEnabled, 0, &type,
-                          value_bytes, &size) == ERROR_SUCCESS) {
-      *breakpad_enabled = value != 0;
-    }
-    ::RegCloseKey(key);
-    return size == sizeof(value);
-  }
-
-  return false;
-}
-
-void InitializeProcessType() {
-  assert(g_process_type == ProcessType::UNINITIALIZED);
-  typedef bool (*IsSandboxedProcessFunc)();
-  IsSandboxedProcessFunc is_sandboxed_process_func =
-      reinterpret_cast<IsSandboxedProcessFunc>(
-          GetProcAddress(GetModuleHandle(NULL), "IsSandboxedProcess"));
-  if (is_sandboxed_process_func && is_sandboxed_process_func()) {
-    g_process_type = ProcessType::NON_BROWSER_PROCESS;
-    return;
-  }
-
-  // TODO(robertshield): Drop the command line check when we drop support for
-  // enabling chrome_elf in unsandboxed processes.
-  const wchar_t* command_line = GetCommandLine();
-  if (command_line && wcsstr(command_line, L"--type")) {
-    g_process_type = ProcessType::NON_BROWSER_PROCESS;
-    return;
-  }
-
-  g_process_type = ProcessType::BROWSER_PROCESS;
-}
-
-bool IsNonBrowserProcess() {
-  assert(g_process_type != ProcessType::UNINITIALIZED);
-  return g_process_type == ProcessType::NON_BROWSER_PROCESS;
-}