1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "content/renderer/render_process_impl.h"
6
7 #include "build/build_config.h"
8
9 #if defined(OS_WIN)
10 #include <windows.h>
11 #include <objidl.h>
12 #include <mlang.h>
13 #endif
14
15 #include "base/basictypes.h"
16 #include "base/command_line.h"
17 #include "base/compiler_specific.h"
18 #include "base/message_loop/message_loop.h"
19 #include "base/strings/utf_string_conversions.h"
20 #include "base/sys_info.h"
21 #include "content/child/child_thread.h"
22 #include "content/child/npapi/plugin_instance.h"
23 #include "content/child/npapi/plugin_lib.h"
24 #include "content/child/site_isolation_policy.h"
25 #include "content/common/view_messages.h"
26 #include "content/public/common/content_switches.h"
27 #include "content/public/renderer/content_renderer_client.h"
28 #include "ipc/ipc_channel.h"
29 #include "ipc/ipc_message_utils.h"
30 #include "skia/ext/platform_canvas.h"
31 #include "third_party/WebKit/public/web/WebFrame.h"
32 #include "ui/surface/transport_dib.h"
33 #include "webkit/glue/webkit_glue.h"
34
35 #if defined(OS_MACOSX)
36 #include "base/mac/mac_util.h"
37 #endif
38
39 #if defined(OS_ANDROID)
40 #include "base/android/sys_utils.h"
41 #endif
42
43 namespace content {
44
RenderProcessImpl()45 RenderProcessImpl::RenderProcessImpl()
46 : shared_mem_cache_cleaner_(
47 FROM_HERE, base::TimeDelta::FromSeconds(5),
48 this, &RenderProcessImpl::ClearTransportDIBCache),
49 transport_dib_next_sequence_number_(0),
50 enabled_bindings_(0) {
51 in_process_plugins_ = InProcessPlugins();
52 for (size_t i = 0; i < arraysize(shared_mem_cache_); ++i)
53 shared_mem_cache_[i] = NULL;
54
55 #if defined(OS_WIN)
56 // HACK: See http://b/issue?id=1024307 for rationale.
57 if (GetModuleHandle(L"LPK.DLL") == NULL) {
58 // Makes sure lpk.dll is loaded by gdi32 to make sure ExtTextOut() works
59 // when buffering into a EMF buffer for printing.
60 typedef BOOL (__stdcall *GdiInitializeLanguagePack)(int LoadedShapingDLLs);
61 GdiInitializeLanguagePack gdi_init_lpk =
62 reinterpret_cast<GdiInitializeLanguagePack>(GetProcAddress(
63 GetModuleHandle(L"GDI32.DLL"),
64 "GdiInitializeLanguagePack"));
65 DCHECK(gdi_init_lpk);
66 if (gdi_init_lpk) {
67 gdi_init_lpk(0);
68 }
69 }
70 #endif
71
72 // Out of process dev tools rely upon auto break behavior.
73 webkit_glue::SetJavaScriptFlags("--debugger-auto-break");
74
75 #if defined(OS_ANDROID)
76 if (base::android::SysUtils::IsLowEndDevice())
77 webkit_glue::SetJavaScriptFlags("--optimize-for-size");
78 #endif
79
80 const CommandLine& command_line = *CommandLine::ForCurrentProcess();
81 if (command_line.HasSwitch(switches::kJavaScriptFlags)) {
82 webkit_glue::SetJavaScriptFlags(
83 command_line.GetSwitchValueASCII(switches::kJavaScriptFlags));
84 }
85
86 // Turn on cross-site document blocking for renderer processes.
87 SiteIsolationPolicy::SetPolicyEnabled(
88 GetContentClient()->renderer()->ShouldEnableSiteIsolationPolicy());
89 }
90
~RenderProcessImpl()91 RenderProcessImpl::~RenderProcessImpl() {
92 #ifndef NDEBUG
93 int count = blink::WebFrame::instanceCount();
94 if (count)
95 DLOG(ERROR) << "WebFrame LEAKED " << count << " TIMES";
96 #endif
97
98 GetShutDownEvent()->Signal();
99 ClearTransportDIBCache();
100 }
101
InProcessPlugins()102 bool RenderProcessImpl::InProcessPlugins() {
103 const CommandLine& command_line = *CommandLine::ForCurrentProcess();
104 #if defined(OS_LINUX) || defined(OS_OPENBSD)
105 // Plugin processes require a UI message loop, and the Linux message loop
106 // implementation only allows one UI loop per process.
107 if (command_line.HasSwitch(switches::kInProcessPlugins))
108 NOTIMPLEMENTED() << ": in process plugins not supported on Linux";
109 return command_line.HasSwitch(switches::kInProcessPlugins);
110 #else
111 return command_line.HasSwitch(switches::kInProcessPlugins) ||
112 command_line.HasSwitch(switches::kSingleProcess);
113 #endif
114 }
115
AddBindings(int bindings)116 void RenderProcessImpl::AddBindings(int bindings) {
117 enabled_bindings_ |= bindings;
118 }
119
GetEnabledBindings() const120 int RenderProcessImpl::GetEnabledBindings() const {
121 return enabled_bindings_;
122 }
123
124 // -----------------------------------------------------------------------------
125 // Platform specific code for dealing with bitmap transport...
126
CreateTransportDIB(size_t size)127 TransportDIB* RenderProcessImpl::CreateTransportDIB(size_t size) {
128 #if defined(OS_POSIX) && !defined(TOOLKIT_GTK) && !defined(OS_ANDROID)
129 // POSIX creates transport DIBs in the browser, so we need to do a sync IPC to
130 // get one. The TransportDIB is cached in the browser.
131 TransportDIB::Handle handle;
132 IPC::Message* msg = new ViewHostMsg_AllocTransportDIB(size, true, &handle);
133 if (!main_thread()->Send(msg))
134 return NULL;
135 if (handle.fd < 0)
136 return NULL;
137 return TransportDIB::Map(handle);
138 #else
139 // Windows, legacy GTK and Android create transport DIBs inside the
140 // renderer.
141 return TransportDIB::Create(size, transport_dib_next_sequence_number_++);
142 #endif
143 }
144
FreeTransportDIB(TransportDIB * dib)145 void RenderProcessImpl::FreeTransportDIB(TransportDIB* dib) {
146 if (!dib)
147 return;
148
149 #if defined(OS_POSIX) && !defined(TOOLKIT_GTK) && !defined(OS_ANDROID)
150 // On POSIX we need to tell the browser that it can drop a reference to the
151 // shared memory.
152 IPC::Message* msg = new ViewHostMsg_FreeTransportDIB(dib->id());
153 main_thread()->Send(msg);
154 #endif
155
156 delete dib;
157 }
158
159 // -----------------------------------------------------------------------------
160
161
GetDrawingCanvas(TransportDIB ** memory,const gfx::Rect & rect)162 skia::PlatformCanvas* RenderProcessImpl::GetDrawingCanvas(
163 TransportDIB** memory, const gfx::Rect& rect) {
164 int width = rect.width();
165 int height = rect.height();
166 const size_t stride = skia::PlatformCanvasStrideForWidth(rect.width());
167 #if defined(OS_LINUX) || defined(OS_OPENBSD)
168 const size_t max_size = base::SysInfo::MaxSharedMemorySize();
169 #else
170 const size_t max_size = 0;
171 #endif
172
173 // If the requested size is too big, reduce the height. Ideally we might like
174 // to reduce the width as well to make the size reduction more "balanced", but
175 // it rarely comes up in practice.
176 if ((max_size != 0) && (height * stride > max_size))
177 height = max_size / stride;
178
179 const size_t size = height * stride;
180
181 if (!GetTransportDIBFromCache(memory, size)) {
182 *memory = CreateTransportDIB(size);
183 if (!*memory)
184 return NULL;
185 }
186
187 return (*memory)->GetPlatformCanvas(width, height);
188 }
189
ReleaseTransportDIB(TransportDIB * mem)190 void RenderProcessImpl::ReleaseTransportDIB(TransportDIB* mem) {
191 if (PutSharedMemInCache(mem)) {
192 shared_mem_cache_cleaner_.Reset();
193 return;
194 }
195
196 FreeTransportDIB(mem);
197 }
198
UseInProcessPlugins() const199 bool RenderProcessImpl::UseInProcessPlugins() const {
200 return in_process_plugins_;
201 }
202
GetTransportDIBFromCache(TransportDIB ** mem,size_t size)203 bool RenderProcessImpl::GetTransportDIBFromCache(TransportDIB** mem,
204 size_t size) {
205 // look for a cached object that is suitable for the requested size.
206 for (size_t i = 0; i < arraysize(shared_mem_cache_); ++i) {
207 if (shared_mem_cache_[i] &&
208 size <= shared_mem_cache_[i]->size()) {
209 *mem = shared_mem_cache_[i];
210 shared_mem_cache_[i] = NULL;
211 return true;
212 }
213 }
214
215 return false;
216 }
217
FindFreeCacheSlot(size_t size)218 int RenderProcessImpl::FindFreeCacheSlot(size_t size) {
219 // simple algorithm:
220 // - look for an empty slot to store mem, or
221 // - if full, then replace smallest entry which is smaller than |size|
222 for (size_t i = 0; i < arraysize(shared_mem_cache_); ++i) {
223 if (shared_mem_cache_[i] == NULL)
224 return i;
225 }
226
227 size_t smallest_size = size;
228 int smallest_index = -1;
229
230 for (size_t i = 1; i < arraysize(shared_mem_cache_); ++i) {
231 const size_t entry_size = shared_mem_cache_[i]->size();
232 if (entry_size < smallest_size) {
233 smallest_size = entry_size;
234 smallest_index = i;
235 }
236 }
237
238 if (smallest_index != -1) {
239 FreeTransportDIB(shared_mem_cache_[smallest_index]);
240 shared_mem_cache_[smallest_index] = NULL;
241 }
242
243 return smallest_index;
244 }
245
PutSharedMemInCache(TransportDIB * mem)246 bool RenderProcessImpl::PutSharedMemInCache(TransportDIB* mem) {
247 const int slot = FindFreeCacheSlot(mem->size());
248 if (slot == -1)
249 return false;
250
251 shared_mem_cache_[slot] = mem;
252 return true;
253 }
254
ClearTransportDIBCache()255 void RenderProcessImpl::ClearTransportDIBCache() {
256 for (size_t i = 0; i < arraysize(shared_mem_cache_); ++i) {
257 if (shared_mem_cache_[i]) {
258 FreeTransportDIB(shared_mem_cache_[i]);
259 shared_mem_cache_[i] = NULL;
260 }
261 }
262 }
263
264 } // namespace content
265