Revert 241548 "Chrome browser process DLL blacklist."

trunk/src/chrome_elf/blacklist/blacklist.cc

Index: trunk/src/chrome_elf/blacklist/blacklist.cc
===================================================================
--- trunk/src/chrome_elf/blacklist/blacklist.cc	(revision 241567)
+++ trunk/src/chrome_elf/blacklist/blacklist.cc	(working copy)
@@ -1,274 +0,0 @@
-// Copyright 2013 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/blacklist/blacklist.h"
-
-#include <string.h>
-
-#include "base/basictypes.h"
-#include "chrome_elf/blacklist/blacklist_interceptions.h"
-#include "sandbox/win/src/interception_internal.h"
-#include "sandbox/win/src/internal_types.h"
-#include "sandbox/win/src/sandbox_utils.h"
-#include "sandbox/win/src/service_resolver.h"
-
-// http://blogs.msdn.com/oldnewthing/archive/2004/10/25/247180.aspx
-extern "C" IMAGE_DOS_HEADER __ImageBase;
-
-namespace blacklist{
-
-const wchar_t* g_troublesome_dlls[kTroublesomeDllsMaxCount] = {};
-int g_troublesome_dlls_cur_index = 0;
-
-const wchar_t kRegistryBeaconPath[] = L"SOFTWARE\\Google\\Chrome\\BLBeacon";
-
-}  // namespace blacklist
-
-// Allocate storage for thunks in a RWX page of this module to save on doing
-// an extra allocation at run time.
-#if !defined(_WIN64)
-// 64-bit images appear to not support writeable and executable pages.
-// This would yield compile warning C4330.
-// TODO(robertshield): Add 64 bit support.
-#pragma section(".crthunk",read,write,execute)
-__declspec(allocate(".crthunk")) sandbox::ThunkData g_thunk_storage;
-#endif
-
-namespace {
-
-enum Version {
-  VERSION_PRE_XP_SP2 = 0,  // Not supported.
-  VERSION_XP_SP2,
-  VERSION_SERVER_2003, // Also includes XP Pro x64 and Server 2003 R2.
-  VERSION_VISTA,       // Also includes Windows Server 2008.
-  VERSION_WIN7,        // Also includes Windows Server 2008 R2.
-  VERSION_WIN8,        // Also includes Windows Server 2012.
-  VERSION_WIN8_1,
-  VERSION_WIN_LAST,    // Indicates error condition.
-};
-
-// Whether a process is running under WOW64 (the wrapper that allows 32-bit
-// processes to run on 64-bit versions of Windows).  This will return
-// WOW64_DISABLED for both "32-bit Chrome on 32-bit Windows" and "64-bit
-// Chrome on 64-bit Windows".  WOW64_UNKNOWN means "an error occurred", e.g.
-// the process does not have sufficient access rights to determine this.
-enum WOW64Status {
-  WOW64_DISABLED,
-  WOW64_ENABLED,
-  WOW64_UNKNOWN,
-};
-
-WOW64Status GetWOW64StatusForCurrentProcess() {
-  typedef BOOL (WINAPI* IsWow64ProcessFunc)(HANDLE, PBOOL);
-  IsWow64ProcessFunc is_wow64_process = reinterpret_cast<IsWow64ProcessFunc>(
-      GetProcAddress(GetModuleHandle(L"kernel32.dll"), "IsWow64Process"));
-  if (!is_wow64_process)
-    return WOW64_DISABLED;
-  BOOL is_wow64 = FALSE;
-  if (!(*is_wow64_process)(GetCurrentProcess(), &is_wow64))
-    return WOW64_UNKNOWN;
-  return is_wow64 ? WOW64_ENABLED : WOW64_DISABLED;
-}
-
-class OSInfo {
- public:
-  struct VersionNumber {
-    int major;
-    int minor;
-    int build;
-  };
-
-  struct ServicePack {
-    int major;
-    int minor;
-  };
-
-  OSInfo() {
-    OSVERSIONINFOEX version_info = { sizeof(version_info) };
-    GetVersionEx(reinterpret_cast<OSVERSIONINFO*>(&version_info));
-    version_number_.major = version_info.dwMajorVersion;
-    version_number_.minor = version_info.dwMinorVersion;
-    version_number_.build = version_info.dwBuildNumber;
-    if ((version_number_.major == 5) && (version_number_.minor > 0)) {
-      // Treat XP Pro x64, Home Server, and Server 2003 R2 as Server 2003.
-      version_ = (version_number_.minor == 1) ? VERSION_XP_SP2 :
-                                                VERSION_SERVER_2003;
-      if (version_ == VERSION_XP_SP2 && version_info.wServicePackMajor < 2)
-        version_ = VERSION_PRE_XP_SP2;
-    } else if (version_number_.major == 6) {
-      switch (version_number_.minor) {
-        case 0:
-          // Treat Windows Server 2008 the same as Windows Vista.
-          version_ = VERSION_VISTA;
-          break;
-        case 1:
-          // Treat Windows Server 2008 R2 the same as Windows 7.
-          version_ = VERSION_WIN7;
-          break;
-        case 2:
-          // Treat Windows Server 2012 the same as Windows 8.
-          version_ = VERSION_WIN8;
-          break;
-        default:
-          version_ = VERSION_WIN8_1;
-          break;
-      }
-    } else if (version_number_.major > 6) {
-      version_ = VERSION_WIN_LAST;
-    } else {
-      version_ = VERSION_PRE_XP_SP2;
-    }
-
-    service_pack_.major = version_info.wServicePackMajor;
-    service_pack_.minor = version_info.wServicePackMinor;
-  }
-
-  Version version() const { return version_; }
-  VersionNumber version_number() const { return version_number_; }
-  ServicePack service_pack() const { return service_pack_; }
-
- private:
-  Version version_;
-  VersionNumber version_number_;
-  ServicePack service_pack_;
-
-  DISALLOW_COPY_AND_ASSIGN(OSInfo);
-};
-
-bool IsNonBrowserProcess() {
-  wchar_t* command_line = GetCommandLine();
-  return (command_line && wcsstr(command_line, L"--type"));
-}
-
-}  // namespace
-
-namespace blacklist {
-
-bool CreateBeacon() {
-  HKEY beacon_key = NULL;
-  DWORD disposition = 0;
-  LONG result = ::RegCreateKeyEx(HKEY_CURRENT_USER,
-                                 kRegistryBeaconPath,
-                                 0,
-                                 NULL,
-                                 0,
-                                 KEY_WRITE,
-                                 NULL,
-                                 &beacon_key,
-                                 &disposition);
-  bool success = (result == ERROR_SUCCESS &&
-                  disposition != REG_OPENED_EXISTING_KEY);
-  if (result == ERROR_SUCCESS)
-    ::RegCloseKey(beacon_key);
-  return success;
-}
-
-bool ClearBeacon() {
-  LONG result = ::RegDeleteKey(HKEY_CURRENT_USER, kRegistryBeaconPath);
-  return (result == ERROR_SUCCESS);
-}
-
-bool AddDllToBlacklist(const wchar_t* dll_name) {
-  if (g_troublesome_dlls_cur_index >= kTroublesomeDllsMaxCount)
-    return false;
-  for (int i = 0; i < g_troublesome_dlls_cur_index; ++i) {
-    if (!wcscmp(g_troublesome_dlls[i], dll_name))
-      return true;
-  }
-
-  // Copy string to blacklist.
-  wchar_t* str_buffer = new wchar_t[wcslen(dll_name) + 1];
-  wcscpy(str_buffer, dll_name);
-
-  g_troublesome_dlls[g_troublesome_dlls_cur_index] = str_buffer;
-  g_troublesome_dlls_cur_index++;
-  return true;
-}
-
-bool RemoveDllFromBlacklist(const wchar_t* dll_name) {
-  for (int i = 0; i < g_troublesome_dlls_cur_index; ++i) {
-    if (!wcscmp(g_troublesome_dlls[i], dll_name)) {
-      // Found the thing to remove. Delete it then replace it with the last
-      // element.
-      g_troublesome_dlls_cur_index--;
-      delete[] g_troublesome_dlls[i];
-      g_troublesome_dlls[i] = g_troublesome_dlls[g_troublesome_dlls_cur_index];
-      g_troublesome_dlls[g_troublesome_dlls_cur_index] = NULL;
-      return true;
-    }
-  }
-  return false;
-}
-
-bool Initialize(bool force) {
-#if defined(_WIN64)
-  // TODO(robertshield): Implement 64-bit support by providing 64-bit
-  //                     interceptors.
-  return false;
-#endif
-
-  // Check to see that we found the functions we need in ntdll.
-  if (!InitializeInterceptImports())
-    return false;
-
-  // Check to see if this is a non-browser process, abort if so.
-  if (IsNonBrowserProcess())
-    return false;
-
-  // Check to see if a beacon is present, abort if so.
-  if (!force && !CreateBeacon())
-    return false;
-
-  // Don't try blacklisting on unsupported OS versions.
-  OSInfo os_info;
-  if (os_info.version() <= VERSION_PRE_XP_SP2)
-    return false;
-
-  // Pseudo-handle, no need to close.
-  HANDLE current_process = ::GetCurrentProcess();
-
-  // Tells the resolver to patch already patched functions.
-  const bool kRelaxed = true;
-
-  // Create a thunk via the appropriate ServiceResolver instance.
-  sandbox::ServiceResolverThunk* thunk;
-#if defined(_WIN64)
-  // TODO(robertshield): Use the appropriate thunk for 64-bit support
-  // when said support is implemented.
-#else
-  if (GetWOW64StatusForCurrentProcess() == WOW64_ENABLED) {
-    if (os_info.version() >= VERSION_WIN8)
-      thunk = new sandbox::Wow64W8ResolverThunk(current_process, kRelaxed);
-    else
-      thunk = new sandbox::Wow64ResolverThunk(current_process, kRelaxed);
-  } else if (os_info.version() >= VERSION_WIN8) {
-    thunk = new sandbox::Win8ResolverThunk(current_process, kRelaxed);
-  } else {
-    thunk = new sandbox::ServiceResolverThunk(current_process, kRelaxed);
-  }
-#endif
-
-#if defined(_WIN64)
-  BYTE* thunk_storage = new BYTE[sizeof(sandbox::ThunkData)];
-#else
-  BYTE* thunk_storage = reinterpret_cast<BYTE*>(&g_thunk_storage);
-#endif
-
-  thunk->AllowLocalPatches();
-
-  // Get ntdll base, target name, interceptor address,
-  NTSTATUS ret = thunk->Setup(::GetModuleHandle(sandbox::kNtdllName),
-                              reinterpret_cast<void*>(&__ImageBase),
-                              "NtMapViewOfSection",
-                              NULL,
-                              &blacklist::BlNtMapViewOfSection,
-                              thunk_storage,
-                              sizeof(sandbox::ThunkData),
-                              NULL);
-
-  delete thunk;
-  return NT_SUCCESS(ret);
-}
-
-}  // namespace blacklist