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// Copyright (c) 2012 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 "content/renderer/renderer_main_platform_delegate.h"
#include "base/command_line.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "base/string16.h"
#include "base/win/win_util.h"
#include "content/public/common/content_switches.h"
#include "content/public/common/injection_test_win.h"
#include "content/public/renderer/render_thread.h"
#include "content/renderer/render_thread_impl.h"
#include "sandbox/win/src/sandbox.h"
#include "skia/ext/skia_sandbox_support_win.h"
#include "skia/ext/vector_platform_device_emf_win.h"
#include "third_party/icu/public/i18n/unicode/timezone.h"
namespace content {
namespace {
// Windows-only skia sandbox support
void SkiaPreCacheFont(const LOGFONT& logfont) {
RenderThread* render_thread = RenderThread::Get();
if (render_thread) {
render_thread->PreCacheFont(logfont);
}
}
void SkiaPreCacheFontCharacters(const LOGFONT& logfont,
const wchar_t* text,
unsigned int text_length) {
RenderThreadImpl* render_thread_impl = RenderThreadImpl::current();
if (render_thread_impl) {
render_thread_impl->PreCacheFontCharacters(logfont,
string16(text, text_length));
}
}
void InitExitInterceptions() {
// If code subsequently tries to exit using exit(), _exit(), abort(), or
// ExitProcess(), force a crash (since otherwise these would be silent
// terminations and fly under the radar).
base::win::SetShouldCrashOnProcessDetach(true);
base::win::SetAbortBehaviorForCrashReporting();
}
} // namespace
RendererMainPlatformDelegate::RendererMainPlatformDelegate(
const MainFunctionParams& parameters)
: parameters_(parameters),
sandbox_test_module_(NULL) {
}
RendererMainPlatformDelegate::~RendererMainPlatformDelegate() {
}
void RendererMainPlatformDelegate::PlatformInitialize() {
InitExitInterceptions();
// Be mindful of what resources you acquire here. They can be used by
// malicious code if the renderer gets compromised.
const CommandLine& command_line = parameters_.command_line;
bool no_sandbox = command_line.HasSwitch(switches::kNoSandbox);
if (!no_sandbox) {
// ICU DateFormat class (used in base/time_format.cc) needs to get the
// Olson timezone ID by accessing the registry keys under
// HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones.
// After TimeZone::createDefault is called once here, the timezone ID is
// cached and there's no more need to access the registry. If the sandbox
// is disabled, we don't have to make this dummy call.
scoped_ptr<icu::TimeZone> zone(icu::TimeZone::createDefault());
SetSkiaEnsureTypefaceAccessible(SkiaPreCacheFont);
skia::SetSkiaEnsureTypefaceCharactersAccessible(
SkiaPreCacheFontCharacters);
}
}
void RendererMainPlatformDelegate::PlatformUninitialize() {
// At this point we are shutting down in a normal code path, so undo our
// hack to crash on exit.
base::win::SetShouldCrashOnProcessDetach(false);
}
bool RendererMainPlatformDelegate::InitSandboxTests(bool no_sandbox) {
const CommandLine& command_line = parameters_.command_line;
DVLOG(1) << "Started renderer with " << command_line.GetCommandLineString();
sandbox::TargetServices* target_services =
parameters_.sandbox_info->target_services;
if (target_services && !no_sandbox) {
std::wstring test_dll_name =
command_line.GetSwitchValueNative(switches::kTestSandbox);
if (!test_dll_name.empty()) {
sandbox_test_module_ = LoadLibrary(test_dll_name.c_str());
DCHECK(sandbox_test_module_);
if (!sandbox_test_module_) {
return false;
}
}
}
return true;
}
bool RendererMainPlatformDelegate::EnableSandbox() {
sandbox::TargetServices* target_services =
parameters_.sandbox_info->target_services;
if (target_services) {
// Cause advapi32 to load before the sandbox is turned on.
unsigned int dummy_rand;
rand_s(&dummy_rand);
// Warm up language subsystems before the sandbox is turned on.
::GetUserDefaultLangID();
::GetUserDefaultLCID();
target_services->LowerToken();
return true;
}
return false;
}
void RendererMainPlatformDelegate::RunSandboxTests(bool no_sandbox) {
if (sandbox_test_module_) {
RunRendererTests run_security_tests =
reinterpret_cast<RunRendererTests>(GetProcAddress(sandbox_test_module_,
kRenderTestCall));
DCHECK(run_security_tests);
if (run_security_tests) {
int test_count = 0;
DVLOG(1) << "Running renderer security tests";
BOOL result = run_security_tests(&test_count);
CHECK(result) << "Test number " << test_count << " has failed.";
}
}
}
} // namespace content
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