1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
|
// 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/strings/string16.h"
#include "base/win/scoped_comptr.h"
#include "base/win/win_util.h"
#include "base/win/windows_version.h"
#include "content/common/sandbox_win.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/vector_platform_device_emf_win.h"
#include "third_party/WebKit/public/web/win/WebFontRendering.h"
#include "third_party/icu/source/i18n/unicode/timezone.h"
#include "third_party/skia/include/ports/SkFontMgr.h"
#include "third_party/skia/include/ports/SkTypeface_win.h"
#ifdef ENABLE_VTUNE_JIT_INTERFACE
#include "v8/src/third_party/vtune/v8-vtune.h"
#endif
#include <dwrite.h>
namespace content {
namespace {
// Windows-only skia sandbox support
// These are used for GDI-path rendering.
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,
base::string16(text, text_length));
}
}
// Windows-only DirectWrite support. These warm up the DirectWrite paths
// before sandbox lock down to allow Skia access to the Font Manager service.
void CreateDirectWriteFactory(IDWriteFactory** factory) {
typedef decltype(DWriteCreateFactory)* DWriteCreateFactoryProc;
DWriteCreateFactoryProc dwrite_create_factory_proc =
reinterpret_cast<DWriteCreateFactoryProc>(
GetProcAddress(LoadLibraryW(L"dwrite.dll"), "DWriteCreateFactory"));
CHECK(dwrite_create_factory_proc);
CHECK(SUCCEEDED(
dwrite_create_factory_proc(DWRITE_FACTORY_TYPE_ISOLATED,
__uuidof(IDWriteFactory),
reinterpret_cast<IUnknown**>(factory))));
}
void WarmupDirectWrite() {
// The objects used here are intentionally not freed as we want the Skia
// code to use these objects after warmup.
IDWriteFactory* factory;
CreateDirectWriteFactory(&factory);
blink::WebFontRendering::setDirectWriteFactory(factory);
SkFontMgr* fontmgr = SkFontMgr_New_DirectWrite(factory);
SkTypeface* typeface = fontmgr->legacyCreateTypeface("Times New Roman", 0);
SkPaint paint_warmup;
paint_warmup.setTypeface(typeface);
wchar_t glyph = L'S';
paint_warmup.measureText(&glyph, 2);
}
} // namespace
RendererMainPlatformDelegate::RendererMainPlatformDelegate(
const MainFunctionParams& parameters)
: parameters_(parameters),
sandbox_test_module_(NULL) {
}
RendererMainPlatformDelegate::~RendererMainPlatformDelegate() {
}
void RendererMainPlatformDelegate::PlatformInitialize() {
const CommandLine& command_line = parameters_.command_line;
#ifdef ENABLE_VTUNE_JIT_INTERFACE
if (command_line.HasSwitch(switches::kEnableVtune))
vTune::InitializeVtuneForV8();
#endif
// Be mindful of what resources you acquire here. They can be used by
// malicious code if the renderer gets compromised.
bool no_sandbox = command_line.HasSwitch(switches::kNoSandbox);
bool use_direct_write = ShouldUseDirectWrite();
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());
if (use_direct_write) {
WarmupDirectWrite();
} else {
SkTypeface_SetEnsureLOGFONTAccessibleProc(SkiaPreCacheFont);
skia::SetSkiaEnsureTypefaceCharactersAccessible(
SkiaPreCacheFontCharacters);
}
}
blink::WebFontRendering::setUseDirectWrite(use_direct_write);
blink::WebFontRendering::setUseSubpixelPositioning(use_direct_write);
}
void RendererMainPlatformDelegate::PlatformUninitialize() {
}
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
|
