src/third_party/WebKit/Source/bindings/core/v8/V8ScriptRunner.cpp

   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/ScriptForbiddenScope.h"
  39 #include "platform/TraceEvent.h"
  40
  41 namespace blink {
  42
  43 namespace {
  44
  45 // In order to make sure all pending messages to be processed in
  46 // v8::Function::Call, we don't call handleMaxRecursionDepthExceeded
  47 // directly. Instead, we create a v8::Function of
  48 // throwStackOverflowException and call it.
  49 void throwStackOverflowException(const v8::FunctionCallbackInfo<v8::Value>& info)
  50 {
  51     V8ThrowException::throwRangeError(info.GetIsolate(), "Maximum call stack size exceeded.");
  52 }
  53
  54 v8::Local<v8::Value> throwStackOverflowExceptionIfNeeded(v8::Isolate* isolate)
  55 {
  56     if (V8PerIsolateData::from(isolate)->isHandlingRecursionLevelError()) {
  57         // If we are already handling a recursion level error, we should
  58         // not invoke v8::Function::Call.
  59         return v8::Undefined(isolate);
  60     }
  61     V8PerIsolateData::from(isolate)->setIsHandlingRecursionLevelError(true);
  62     v8::Local<v8::Value> result = v8::Function::New(isolate, throwStackOverflowException)->Call(v8::Undefined(isolate), 0, 0);
  63     V8PerIsolateData::from(isolate)->setIsHandlingRecursionLevelError(false);
  64     return result;
  65 }
  66
  67 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)
  68 {
  69     v8::ScriptCompiler::Source source(code, origin);
  70     v8::Local<v8::Script> script = v8::ScriptCompiler::Compile(isolate, &source, options);
  71     const v8::ScriptCompiler::CachedData* cachedData = source.GetCachedData();
  72     if (resource && cachedData) {
  73         resource->clearCachedMetadata();
  74         resource->setCachedMetadata(
  75             cacheTag,
  76             reinterpret_cast<const char*>(cachedData->data),
  77             cachedData->length,
  78             cacheType);
  79     }
  80     return script;
  81 }
  82
  83 v8::Local<v8::Script> compileAndConsumeCache(v8::Isolate* isolate, v8::Handle<v8::String> code, v8::ScriptOrigin origin, ScriptResource* resource, v8::ScriptCompiler::CompileOptions options, unsigned cacheTag)
  84 {
  85     // Consume existing cache data:
  86     CachedMetadata* cachedMetadata = resource->cachedMetadata(cacheTag);
  87     v8::ScriptCompiler::CachedData* cachedData = new v8::ScriptCompiler::CachedData(
  88         reinterpret_cast<const uint8_t*>(cachedMetadata->data()),
  89         cachedMetadata->size(),
  90         v8::ScriptCompiler::CachedData::BufferNotOwned);
  91     v8::ScriptCompiler::Source source(code, origin, cachedData);
  92     return v8::ScriptCompiler::Compile(isolate, &source, options);
  93 }
  94
  95 } // namespace
  96
  97 v8::Local<v8::Script> V8ScriptRunner::compileScript(const ScriptSourceCode& source, v8::Isolate* isolate, AccessControlStatus corsStatus, V8CacheOptions cacheOptions)
  98 {
  99     return compileScript(v8String(isolate, source.source()), source.url(), source.startPosition(), source.resource(), source.streamer(), isolate, corsStatus, cacheOptions);
 100 }
 101
 102 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)
 103 {
 104     TRACE_EVENT1("v8", "v8.compile", "fileName", fileName.utf8());
 105     TRACE_EVENT_SCOPED_SAMPLING_STATE("v8", "V8Compile");
 106
 107     // NOTE: For compatibility with WebCore, ScriptSourceCode's line starts at
 108     // 1, whereas v8 starts at 0.
 109     v8::Handle<v8::String> name = v8String(isolate, fileName);
 110     v8::Handle<v8::Integer> line = v8::Integer::New(isolate, scriptStartPosition.m_line.zeroBasedInt());
 111     v8::Handle<v8::Integer> column = v8::Integer::New(isolate, scriptStartPosition.m_column.zeroBasedInt());
 112     v8::Handle<v8::Boolean> isSharedCrossOrigin = corsStatus == SharableCrossOrigin ? v8::True(isolate) : v8::False(isolate);
 113     v8::ScriptOrigin origin(name, line, column, isSharedCrossOrigin);
 114
 115     v8::Local<v8::Script> script;
 116     unsigned cacheTag = 0;
 117     if (streamer) {
 118         // We don't stream scripts which don't have a Resource.
 119         ASSERT(resource);
 120         // Failed resources should never get this far.
 121         ASSERT(!resource->errorOccurred());
 122         ASSERT(streamer->isFinished());
 123         ASSERT(!streamer->streamingSuppressed());
 124         script = v8::ScriptCompiler::Compile(isolate, streamer->source(), code, origin);
 125         // Whether to produce the cached data or not is decided when the
 126         // streamer is started. Here we only need to get the data out.
 127         const v8::ScriptCompiler::CachedData* newCachedData = streamer->source()->GetCachedData();
 128         if (newCachedData) {
 129             resource->clearCachedMetadata();
 130             // Temporarily disable cached metadata for streaming; it's
 131             // producing broken data. FIXME: enable it again.
 132             // resource->setCachedMetadata(streamer->cachedDataType(), reinterpret_cast<const char*>(newCachedData->data), newCachedData->length);
 133         }
 134     } else if (!resource || !resource->url().protocolIsInHTTPFamily() || code->Length() < 1024) {
 135         v8::ScriptCompiler::Source source(code, origin);
 136         script = v8::ScriptCompiler::Compile(isolate, &source, v8::ScriptCompiler::kNoCompileOptions);
 137     } else {
 138         switch (cacheOptions) {
 139         case V8CacheOptionsParse:
 140             cacheTag = tagForParserCache();
 141             script = resource->cachedMetadata(cacheTag)
 142                 ? compileAndConsumeCache(isolate, code, origin, resource, v8::ScriptCompiler::kConsumeParserCache, cacheTag)
 143                 : compileAndProduceCache(isolate, code, origin, resource, v8::ScriptCompiler::kProduceParserCache, cacheTag, Resource::SendToPlatform);
 144             break;
 145         case V8CacheOptionsCode:
 146             cacheTag = tagForCodeCache();
 147             script = resource->cachedMetadata(cacheTag)
 148                 ? compileAndConsumeCache(isolate, code, origin, resource, v8::ScriptCompiler::kConsumeCodeCache, cacheTag)
 149                 : compileAndProduceCache(isolate, code, origin, resource, v8::ScriptCompiler::kProduceCodeCache, cacheTag, Resource::SendToPlatform);
 150             break;
 151         case V8CacheOptionsOff:
 152             // Previous behaviour was to always generate an in-memory parser
 153             // cache. We emulate this here.
 154             // FIXME: Determine whether this should get its own setting, so we
 155             //        can also have a true 'off'.
 156             cacheTag = tagForParserCache();
 157             script = resource->cachedMetadata(cacheTag)
 158                 ? compileAndConsumeCache(isolate, code, origin, resource, v8::ScriptCompiler::kConsumeParserCache, cacheTag)
 159                 : compileAndProduceCache(isolate, code, origin, resource, v8::ScriptCompiler::kProduceParserCache, cacheTag, Resource::CacheLocally);
 160             break;
 161         }
 162     }
 163     return script;
 164 }
 165
 166 v8::Local<v8::Value> V8ScriptRunner::runCompiledScript(v8::Isolate* isolate, v8::Handle<v8::Script> script, ExecutionContext* context)
 167 {
 168     if (script.IsEmpty())
 169         return v8::Local<v8::Value>();
 170     TRACE_EVENT_SCOPED_SAMPLING_STATE("v8", "V8Execution");
 171     TRACE_EVENT1("v8", "v8.run", "fileName", TRACE_STR_COPY(*v8::String::Utf8Value(script->GetUnboundScript()->GetScriptName())));
 172
 173     if (V8RecursionScope::recursionLevel(isolate) >= kMaxRecursionDepth)
 174         return throwStackOverflowExceptionIfNeeded(isolate);
 175
 176     RELEASE_ASSERT(!context->isIteratingOverObservers());
 177
 178     // Run the script and keep track of the current recursion depth.
 179     v8::Local<v8::Value> result;
 180     {
 181         if (ScriptForbiddenScope::isScriptForbidden())
 182             return v8::Local<v8::Value>();
 183         V8RecursionScope recursionScope(isolate);
 184         result = script->Run();
 185     }
 186
 187     if (result.IsEmpty())
 188         return v8::Local<v8::Value>();
 189
 190     crashIfV8IsDead();
 191     return result;
 192 }
 193
 194 v8::Local<v8::Value> V8ScriptRunner::compileAndRunInternalScript(v8::Handle<v8::String> source, v8::Isolate* isolate, const String& fileName, const TextPosition& scriptStartPosition)
 195 {
 196     v8::Handle<v8::Script> script = V8ScriptRunner::compileScript(source, fileName, scriptStartPosition, 0, 0, isolate);
 197     if (script.IsEmpty())
 198         return v8::Local<v8::Value>();
 199
 200     TRACE_EVENT0("v8", "v8.run");
 201     TRACE_EVENT_SCOPED_SAMPLING_STATE("v8", "V8Execution");
 202     V8RecursionScope::MicrotaskSuppression recursionScope(isolate);
 203     v8::Local<v8::Value> result = script->Run();
 204     crashIfV8IsDead();
 205     return result;
 206 }
 207
 208 v8::Local<v8::Value> V8ScriptRunner::runCompiledInternalScript(v8::Isolate* isolate, v8::Handle<v8::Script> script)
 209 {
 210     TRACE_EVENT0("v8", "v8.run");
 211     TRACE_EVENT_SCOPED_SAMPLING_STATE("v8", "V8Execution");
 212     V8RecursionScope::MicrotaskSuppression recursionScope(isolate);
 213     v8::Local<v8::Value> result = script->Run();
 214     crashIfV8IsDead();
 215     return result;
 216 }
 217
 218 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)
 219 {
 220     TRACE_EVENT0("v8", "v8.callFunction");
 221     TRACE_EVENT_SCOPED_SAMPLING_STATE("v8", "V8Execution");
 222
 223     if (V8RecursionScope::recursionLevel(isolate) >= kMaxRecursionDepth)
 224         return throwStackOverflowExceptionIfNeeded(isolate);
 225
 226     RELEASE_ASSERT(!context->isIteratingOverObservers());
 227
 228     if (ScriptForbiddenScope::isScriptForbidden())
 229         return v8::Local<v8::Value>();
 230     V8RecursionScope recursionScope(isolate);
 231     v8::Local<v8::Value> result = function->Call(receiver, argc, args);
 232     crashIfV8IsDead();
 233     return result;
 234 }
 235
 236 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)
 237 {
 238     TRACE_EVENT0("v8", "v8.callFunction");
 239     TRACE_EVENT_SCOPED_SAMPLING_STATE("v8", "V8Execution");
 240     V8RecursionScope::MicrotaskSuppression recursionScope(isolate);
 241     v8::Local<v8::Value> result = function->Call(receiver, argc, args);
 242     crashIfV8IsDead();
 243     return result;
 244 }
 245
 246 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[])
 247 {
 248     TRACE_EVENT0("v8", "v8.callFunction");
 249     TRACE_EVENT_SCOPED_SAMPLING_STATE("v8", "V8Execution");
 250
 251     V8RecursionScope::MicrotaskSuppression recursionScope(isolate);
 252     v8::Local<v8::Value> result = object->CallAsFunction(receiver, argc, args);
 253     crashIfV8IsDead();
 254     return result;
 255 }
 256
 257 v8::Local<v8::Object> V8ScriptRunner::instantiateObject(v8::Isolate* isolate, v8::Handle<v8::ObjectTemplate> objectTemplate)
 258 {
 259     TRACE_EVENT0("v8", "v8.newInstance");
 260     TRACE_EVENT_SCOPED_SAMPLING_STATE("v8", "V8Execution");
 261
 262     V8RecursionScope::MicrotaskSuppression scope(isolate);
 263     v8::Local<v8::Object> result = objectTemplate->NewInstance();
 264     crashIfV8IsDead();
 265     return result;
 266 }
 267
 268 v8::Local<v8::Object> V8ScriptRunner::instantiateObject(v8::Isolate* isolate, v8::Handle<v8::Function> function, int argc, v8::Handle<v8::Value> argv[])
 269 {
 270     TRACE_EVENT0("v8", "v8.newInstance");
 271     TRACE_EVENT_SCOPED_SAMPLING_STATE("v8", "V8Execution");
 272
 273     V8RecursionScope::MicrotaskSuppression scope(isolate);
 274     v8::Local<v8::Object> result = function->NewInstance(argc, argv);
 275     crashIfV8IsDead();
 276     return result;
 277 }
 278
 279 v8::Local<v8::Object> V8ScriptRunner::instantiateObjectInDocument(v8::Isolate* isolate, v8::Handle<v8::Function> function, ExecutionContext* context, int argc, v8::Handle<v8::Value> argv[])
 280 {
 281     TRACE_EVENT0("v8", "v8.newInstance");
 282     TRACE_EVENT_SCOPED_SAMPLING_STATE("v8", "V8Execution");
 283     if (ScriptForbiddenScope::isScriptForbidden())
 284         return v8::Local<v8::Object>();
 285     V8RecursionScope scope(isolate);
 286     v8::Local<v8::Object> result = function->NewInstance(argc, argv);
 287     crashIfV8IsDead();
 288     return result;
 289 }
 290
 291 unsigned V8ScriptRunner::tagForParserCache()
 292 {
 293     return StringHash::hash(v8::V8::GetVersion()) * 2;
 294 }
 295
 296 unsigned V8ScriptRunner::tagForCodeCache()
 297 {
 298     return StringHash::hash(v8::V8::GetVersion()) * 2 + 1;
 299 }
 300
 301 } // namespace blink