1 /*
2 * Copyright (C) 2009 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include "config.h"
27 #include "bindings/core/v8/V8ScriptRunner.h"
28
29 #include "bindings/core/v8/ScriptSourceCode.h"
30 #include "bindings/core/v8/ScriptStreamer.h"
31 #include "bindings/core/v8/V8Binding.h"
32 #include "bindings/core/v8/V8GCController.h"
33 #include "bindings/core/v8/V8RecursionScope.h"
34 #include "bindings/core/v8/V8ThrowException.h"
35 #include "core/dom/ExecutionContext.h"
36 #include "core/fetch/CachedMetadata.h"
37 #include "core/fetch/ScriptResource.h"
38 #include "platform/TraceEvent.h"
39
40 namespace blink {
41
42 namespace {
43
44 // In order to make sure all pending messages to be processed in
45 // v8::Function::Call, we don't call handleMaxRecursionDepthExceeded
46 // directly. Instead, we create a v8::Function of
47 // throwStackOverflowException and call it.
throwStackOverflowException(const v8::FunctionCallbackInfo<v8::Value> & info)48 void throwStackOverflowException(const v8::FunctionCallbackInfo<v8::Value>& info)
49 {
50 V8ThrowException::throwRangeError("Maximum call stack size exceeded.", info.GetIsolate());
51 }
52
throwStackOverflowExceptionIfNeeded(v8::Isolate * isolate)53 v8::Local<v8::Value> throwStackOverflowExceptionIfNeeded(v8::Isolate* isolate)
54 {
55 if (V8PerIsolateData::from(isolate)->isHandlingRecursionLevelError()) {
56 // If we are already handling a recursion level error, we should
57 // not invoke v8::Function::Call.
58 return v8::Undefined(isolate);
59 }
60 V8PerIsolateData::from(isolate)->setIsHandlingRecursionLevelError(true);
61 v8::Local<v8::Value> result = v8::Function::New(isolate, throwStackOverflowException)->Call(v8::Undefined(isolate), 0, 0);
62 V8PerIsolateData::from(isolate)->setIsHandlingRecursionLevelError(false);
63 return result;
64 }
65
compileAndProduceCache(v8::Isolate * isolate,v8::Handle<v8::String> code,v8::ScriptOrigin origin,ScriptResource * resource,v8::ScriptCompiler::CompileOptions options,unsigned cacheTag,Resource::MetadataCacheType cacheType)66 v8::Local<v8::Script> compileAndProduceCache(v8::Isolate* isolate, v8::Handle<v8::String> code, v8::ScriptOrigin origin, ScriptResource* resource, v8::ScriptCompiler::CompileOptions options, unsigned cacheTag, Resource::MetadataCacheType cacheType)
67 {
68 v8::ScriptCompiler::Source source(code, origin);
69 v8::Local<v8::Script> script = v8::ScriptCompiler::Compile(isolate, &source, options);
70 const v8::ScriptCompiler::CachedData* cachedData = source.GetCachedData();
71 if (resource && cachedData) {
72 resource->clearCachedMetadata();
73 resource->setCachedMetadata(
74 cacheTag,
75 reinterpret_cast<const char*>(cachedData->data),
76 cachedData->length,
77 cacheType);
78 }
79 return script;
80 }
81
compileAndConsumeCache(v8::Isolate * isolate,v8::Handle<v8::String> code,v8::ScriptOrigin origin,ScriptResource * resource,v8::ScriptCompiler::CompileOptions options,unsigned cacheTag)82 v8::Local<v8::Script> compileAndConsumeCache(v8::Isolate* isolate, v8::Handle<v8::String> code, v8::ScriptOrigin origin, ScriptResource* resource, v8::ScriptCompiler::CompileOptions options, unsigned cacheTag)
83 {
84 // Consume existing cache data:
85 CachedMetadata* cachedMetadata = resource->cachedMetadata(cacheTag);
86 v8::ScriptCompiler::CachedData* cachedData = new v8::ScriptCompiler::CachedData(
87 reinterpret_cast<const uint8_t*>(cachedMetadata->data()),
88 cachedMetadata->size(),
89 v8::ScriptCompiler::CachedData::BufferNotOwned);
90 v8::ScriptCompiler::Source source(code, origin, cachedData);
91 return v8::ScriptCompiler::Compile(isolate, &source, options);
92 }
93
94 } // namespace
95
compileScript(const ScriptSourceCode & source,v8::Isolate * isolate,AccessControlStatus corsStatus,V8CacheOptions cacheOptions)96 v8::Local<v8::Script> V8ScriptRunner::compileScript(const ScriptSourceCode& source, v8::Isolate* isolate, AccessControlStatus corsStatus, V8CacheOptions cacheOptions)
97 {
98 return compileScript(v8String(isolate, source.source()), source.url(), source.startPosition(), source.resource(), source.streamer(), isolate, corsStatus, cacheOptions);
99 }
100
compileScript(v8::Handle<v8::String> code,const String & fileName,const TextPosition & scriptStartPosition,ScriptResource * resource,ScriptStreamer * streamer,v8::Isolate * isolate,AccessControlStatus corsStatus,V8CacheOptions cacheOptions)101 v8::Local<v8::Script> V8ScriptRunner::compileScript(v8::Handle<v8::String> code, const String& fileName, const TextPosition& scriptStartPosition, ScriptResource* resource, ScriptStreamer* streamer, v8::Isolate* isolate, AccessControlStatus corsStatus, V8CacheOptions cacheOptions)
102 {
103 TRACE_EVENT1("v8", "v8.compile", "fileName", fileName.utf8());
104 TRACE_EVENT_SCOPED_SAMPLING_STATE("v8", "V8Compile");
105
106 // NOTE: For compatibility with WebCore, ScriptSourceCode's line starts at
107 // 1, whereas v8 starts at 0.
108 v8::Handle<v8::String> name = v8String(isolate, fileName);
109 v8::Handle<v8::Integer> line = v8::Integer::New(isolate, scriptStartPosition.m_line.zeroBasedInt());
110 v8::Handle<v8::Integer> column = v8::Integer::New(isolate, scriptStartPosition.m_column.zeroBasedInt());
111 v8::Handle<v8::Boolean> isSharedCrossOrigin = corsStatus == SharableCrossOrigin ? v8::True(isolate) : v8::False(isolate);
112 v8::ScriptOrigin origin(name, line, column, isSharedCrossOrigin);
113
114 v8::Local<v8::Script> script;
115 unsigned cacheTag = 0;
116 if (streamer) {
117 // We don't stream scripts which don't have a Resource.
118 ASSERT(resource);
119 // Failed resources should never get this far.
120 ASSERT(!resource->errorOccurred());
121 ASSERT(streamer->isFinished());
122 ASSERT(!streamer->streamingSuppressed());
123 script = v8::ScriptCompiler::Compile(isolate, streamer->source(), code, origin);
124 // Whether to produce the cached data or not is decided when the
125 // streamer is started. Here we only need to get the data out.
126 const v8::ScriptCompiler::CachedData* newCachedData = streamer->source()->GetCachedData();
127 if (newCachedData) {
128 resource->clearCachedMetadata();
129 resource->setCachedMetadata(streamer->cachedDataType(), reinterpret_cast<const char*>(newCachedData->data), newCachedData->length);
130 }
131 } else if (!resource || !resource->url().protocolIsInHTTPFamily() || code->Length() < 1024) {
132 v8::ScriptCompiler::Source source(code, origin);
133 script = v8::ScriptCompiler::Compile(isolate, &source, v8::ScriptCompiler::kNoCompileOptions);
134 } else {
135 switch (cacheOptions) {
136 case V8CacheOptionsParse:
137 cacheTag = tagForParserCache();
138 script = resource->cachedMetadata(cacheTag)
139 ? compileAndConsumeCache(isolate, code, origin, resource, v8::ScriptCompiler::kConsumeParserCache, cacheTag)
140 : compileAndProduceCache(isolate, code, origin, resource, v8::ScriptCompiler::kProduceParserCache, cacheTag, Resource::SendToPlatform);
141 break;
142 case V8CacheOptionsCode:
143 cacheTag = tagForCodeCache();
144 script = resource->cachedMetadata(cacheTag)
145 ? compileAndConsumeCache(isolate, code, origin, resource, v8::ScriptCompiler::kConsumeCodeCache, cacheTag)
146 : compileAndProduceCache(isolate, code, origin, resource, v8::ScriptCompiler::kProduceCodeCache, cacheTag, Resource::SendToPlatform);
147 break;
148 case V8CacheOptionsOff:
149 // Previous behaviour was to always generate an in-memory parser
150 // cache. We emulate this here.
151 // FIXME: Determine whether this should get its own setting, so we
152 // can also have a true 'off'.
153 cacheTag = tagForParserCache();
154 script = resource->cachedMetadata(cacheTag)
155 ? compileAndConsumeCache(isolate, code, origin, resource, v8::ScriptCompiler::kConsumeParserCache, cacheTag)
156 : compileAndProduceCache(isolate, code, origin, resource, v8::ScriptCompiler::kProduceParserCache, cacheTag, Resource::CacheLocally);
157 break;
158 }
159 }
160 return script;
161 }
162
runCompiledScript(v8::Handle<v8::Script> script,ExecutionContext * context,v8::Isolate * isolate)163 v8::Local<v8::Value> V8ScriptRunner::runCompiledScript(v8::Handle<v8::Script> script, ExecutionContext* context, v8::Isolate* isolate)
164 {
165 if (script.IsEmpty())
166 return v8::Local<v8::Value>();
167 TRACE_EVENT_SCOPED_SAMPLING_STATE("v8", "V8Execution");
168 TRACE_EVENT1("v8", "v8.run", "fileName", TRACE_STR_COPY(*v8::String::Utf8Value(script->GetUnboundScript()->GetScriptName())));
169
170 if (V8RecursionScope::recursionLevel(isolate) >= kMaxRecursionDepth)
171 return throwStackOverflowExceptionIfNeeded(isolate);
172
173 RELEASE_ASSERT(!context->isIteratingOverObservers());
174
175 // Run the script and keep track of the current recursion depth.
176 v8::Local<v8::Value> result;
177 {
178 V8RecursionScope recursionScope(isolate);
179 result = script->Run();
180 }
181
182 if (result.IsEmpty())
183 return v8::Local<v8::Value>();
184
185 crashIfV8IsDead();
186 return result;
187 }
188
compileAndRunInternalScript(v8::Handle<v8::String> source,v8::Isolate * isolate,const String & fileName,const TextPosition & scriptStartPosition)189 v8::Local<v8::Value> V8ScriptRunner::compileAndRunInternalScript(v8::Handle<v8::String> source, v8::Isolate* isolate, const String& fileName, const TextPosition& scriptStartPosition)
190 {
191 v8::Handle<v8::Script> script = V8ScriptRunner::compileScript(source, fileName, scriptStartPosition, 0, 0, isolate);
192 if (script.IsEmpty())
193 return v8::Local<v8::Value>();
194
195 TRACE_EVENT0("v8", "v8.run");
196 TRACE_EVENT_SCOPED_SAMPLING_STATE("v8", "V8Execution");
197 V8RecursionScope::MicrotaskSuppression recursionScope(isolate);
198 v8::Local<v8::Value> result = script->Run();
199 crashIfV8IsDead();
200 return result;
201 }
202
runCompiledInternalScript(v8::Handle<v8::Script> script,v8::Isolate * isolate)203 v8::Local<v8::Value> V8ScriptRunner::runCompiledInternalScript(v8::Handle<v8::Script> script, v8::Isolate* isolate)
204 {
205 TRACE_EVENT0("v8", "v8.run");
206 TRACE_EVENT_SCOPED_SAMPLING_STATE("v8", "V8Execution");
207 V8RecursionScope::MicrotaskSuppression recursionScope(isolate);
208 v8::Local<v8::Value> result = script->Run();
209 crashIfV8IsDead();
210 return result;
211 }
212
callFunction(v8::Handle<v8::Function> function,ExecutionContext * context,v8::Handle<v8::Value> receiver,int argc,v8::Handle<v8::Value> args[],v8::Isolate * isolate)213 v8::Local<v8::Value> V8ScriptRunner::callFunction(v8::Handle<v8::Function> function, ExecutionContext* context, v8::Handle<v8::Value> receiver, int argc, v8::Handle<v8::Value> args[], v8::Isolate* isolate)
214 {
215 TRACE_EVENT0("v8", "v8.callFunction");
216 TRACE_EVENT_SCOPED_SAMPLING_STATE("v8", "V8Execution");
217
218 if (V8RecursionScope::recursionLevel(isolate) >= kMaxRecursionDepth)
219 return throwStackOverflowExceptionIfNeeded(isolate);
220
221 RELEASE_ASSERT(!context->isIteratingOverObservers());
222
223 V8RecursionScope recursionScope(isolate);
224 v8::Local<v8::Value> result = function->Call(receiver, argc, args);
225 crashIfV8IsDead();
226 return result;
227 }
228
callInternalFunction(v8::Handle<v8::Function> function,v8::Handle<v8::Value> receiver,int argc,v8::Handle<v8::Value> args[],v8::Isolate * isolate)229 v8::Local<v8::Value> V8ScriptRunner::callInternalFunction(v8::Handle<v8::Function> function, v8::Handle<v8::Value> receiver, int argc, v8::Handle<v8::Value> args[], v8::Isolate* isolate)
230 {
231 TRACE_EVENT0("v8", "v8.callFunction");
232 TRACE_EVENT_SCOPED_SAMPLING_STATE("v8", "V8Execution");
233 V8RecursionScope::MicrotaskSuppression recursionScope(isolate);
234 v8::Local<v8::Value> result = function->Call(receiver, argc, args);
235 crashIfV8IsDead();
236 return result;
237 }
238
callAsFunction(v8::Isolate * isolate,v8::Handle<v8::Object> object,v8::Handle<v8::Value> receiver,int argc,v8::Handle<v8::Value> args[])239 v8::Local<v8::Value> V8ScriptRunner::callAsFunction(v8::Isolate* isolate, v8::Handle<v8::Object> object, v8::Handle<v8::Value> receiver, int argc, v8::Handle<v8::Value> args[])
240 {
241 TRACE_EVENT0("v8", "v8.callFunction");
242 TRACE_EVENT_SCOPED_SAMPLING_STATE("v8", "V8Execution");
243
244 V8RecursionScope::MicrotaskSuppression recursionScope(isolate);
245 v8::Local<v8::Value> result = object->CallAsFunction(receiver, argc, args);
246 crashIfV8IsDead();
247 return result;
248 }
249
instantiateObject(v8::Isolate * isolate,v8::Handle<v8::ObjectTemplate> objectTemplate)250 v8::Local<v8::Object> V8ScriptRunner::instantiateObject(v8::Isolate* isolate, v8::Handle<v8::ObjectTemplate> objectTemplate)
251 {
252 TRACE_EVENT0("v8", "v8.newInstance");
253 TRACE_EVENT_SCOPED_SAMPLING_STATE("v8", "V8Execution");
254
255 V8RecursionScope::MicrotaskSuppression scope(isolate);
256 v8::Local<v8::Object> result = objectTemplate->NewInstance();
257 crashIfV8IsDead();
258 return result;
259 }
260
instantiateObject(v8::Isolate * isolate,v8::Handle<v8::Function> function,int argc,v8::Handle<v8::Value> argv[])261 v8::Local<v8::Object> V8ScriptRunner::instantiateObject(v8::Isolate* isolate, v8::Handle<v8::Function> function, int argc, v8::Handle<v8::Value> argv[])
262 {
263 TRACE_EVENT0("v8", "v8.newInstance");
264 TRACE_EVENT_SCOPED_SAMPLING_STATE("v8", "V8Execution");
265
266 V8RecursionScope::MicrotaskSuppression scope(isolate);
267 v8::Local<v8::Object> result = function->NewInstance(argc, argv);
268 crashIfV8IsDead();
269 return result;
270 }
271
instantiateObjectInDocument(v8::Isolate * isolate,v8::Handle<v8::Function> function,ExecutionContext * context,int argc,v8::Handle<v8::Value> argv[])272 v8::Local<v8::Object> V8ScriptRunner::instantiateObjectInDocument(v8::Isolate* isolate, v8::Handle<v8::Function> function, ExecutionContext* context, int argc, v8::Handle<v8::Value> argv[])
273 {
274 TRACE_EVENT0("v8", "v8.newInstance");
275 TRACE_EVENT_SCOPED_SAMPLING_STATE("v8", "V8Execution");
276 V8RecursionScope scope(isolate);
277 v8::Local<v8::Object> result = function->NewInstance(argc, argv);
278 crashIfV8IsDead();
279 return result;
280 }
281
tagForParserCache()282 unsigned V8ScriptRunner::tagForParserCache()
283 {
284 return StringHash::hash(v8::V8::GetVersion()) * 2;
285 }
286
tagForCodeCache()287 unsigned V8ScriptRunner::tagForCodeCache()
288 {
289 return StringHash::hash(v8::V8::GetVersion()) * 2 + 1;
290 }
291
292 } // namespace blink
293