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/v8/V8ScriptRunner.h" 28 29 #include "bindings/v8/ScriptSourceCode.h" 30 #include "bindings/v8/V8Binding.h" 31 #include "bindings/v8/V8GCController.h" 32 #include "bindings/v8/V8RecursionScope.h" 33 #include "core/dom/ExecutionContext.h" 34 #include "core/fetch/CachedMetadata.h" 35 #include "core/fetch/ScriptResource.h" 36 #include "platform/TraceEvent.h" 37 38 namespace WebCore { 39 40 v8::Local<v8::Script> V8ScriptRunner::compileScript(const ScriptSourceCode& source, v8::Isolate* isolate, AccessControlStatus corsStatus) 41 { 42 return compileScript(v8String(isolate, source.source()), source.url(), source.startPosition(), source.resource(), isolate, corsStatus); 43 } 44 45 v8::Local<v8::Script> V8ScriptRunner::compileScript(v8::Handle<v8::String> code, const String& fileName, const TextPosition& scriptStartPosition, ScriptResource* resource, v8::Isolate* isolate, AccessControlStatus corsStatus) 46 { 47 // A pseudo-randomly chosen ID used to store and retrieve V8 ScriptData from 48 // the ScriptResource. If the format changes, this ID should be changed too. 49 static const unsigned dataTypeID = 0xECC13BD7; 50 51 // Very small scripts are not worth the effort to store cached data. 52 static const int minLengthForCachedData = 1024; 53 54 TRACE_EVENT1("v8", "v8.compile", "fileName", fileName.utf8()); 55 TRACE_EVENT_SCOPED_SAMPLING_STATE("V8", "V8Compile"); 56 57 // NOTE: For compatibility with WebCore, ScriptSourceCode's line starts at 58 // 1, whereas v8 starts at 0. 59 v8::Handle<v8::String> name = v8String(isolate, fileName); 60 v8::Handle<v8::Integer> line = v8::Integer::New(isolate, scriptStartPosition.m_line.zeroBasedInt()); 61 v8::Handle<v8::Integer> column = v8::Integer::New(isolate, scriptStartPosition.m_column.zeroBasedInt()); 62 v8::Handle<v8::Boolean> isSharedCrossOrigin = corsStatus == SharableCrossOrigin ? v8::True(isolate) : v8::False(isolate); 63 v8::ScriptOrigin origin(name, line, column, isSharedCrossOrigin); 64 65 v8::ScriptCompiler::CompileOptions options = v8::ScriptCompiler::kNoCompileOptions; 66 OwnPtr<v8::ScriptCompiler::CachedData> cachedData; 67 if (resource) { 68 CachedMetadata* cachedMetadata = resource->cachedMetadata(dataTypeID); 69 if (cachedMetadata) { 70 // Ownership of the buffer is not transferred to CachedData. 71 cachedData = adoptPtr(new v8::ScriptCompiler::CachedData(reinterpret_cast<const uint8_t*>(cachedMetadata->data()), cachedMetadata->size())); 72 } else if (code->Length() >= minLengthForCachedData) { 73 options = v8::ScriptCompiler::kProduceDataToCache; 74 } 75 } 76 // source takes ownership of cachedData. 77 v8::ScriptCompiler::Source source(code, origin, cachedData.leakPtr()); 78 v8::Local<v8::Script> script = v8::ScriptCompiler::Compile(isolate, &source, options); 79 if (options == v8::ScriptCompiler::kProduceDataToCache) { 80 const v8::ScriptCompiler::CachedData* newCachedData = source.GetCachedData(); 81 if (newCachedData) { 82 // Ownership of the buffer is not transferred; source's cachedData continues to own it. 83 resource->setCachedMetadata(dataTypeID, reinterpret_cast<const char*>(newCachedData->data), newCachedData->length); 84 } 85 } 86 return script; 87 } 88 89 v8::Local<v8::Value> V8ScriptRunner::runCompiledScript(v8::Handle<v8::Script> script, ExecutionContext* context, v8::Isolate* isolate) 90 { 91 if (script.IsEmpty()) 92 return v8::Local<v8::Value>(); 93 TRACE_EVENT_SCOPED_SAMPLING_STATE("V8", "V8Execution"); 94 TRACE_EVENT1("v8", "v8.run", "fileName", TRACE_STR_COPY(*v8::String::Utf8Value(script->GetUnboundScript()->GetScriptName()))); 95 96 if (V8RecursionScope::recursionLevel(isolate) >= kMaxRecursionDepth) 97 return handleMaxRecursionDepthExceeded(isolate); 98 99 RELEASE_ASSERT(!context->isIteratingOverObservers()); 100 101 // Run the script and keep track of the current recursion depth. 102 v8::Local<v8::Value> result; 103 { 104 V8RecursionScope recursionScope(isolate, context); 105 result = script->Run(); 106 } 107 108 if (result.IsEmpty()) 109 return v8::Local<v8::Value>(); 110 111 crashIfV8IsDead(); 112 return result; 113 } 114 115 v8::Local<v8::Value> V8ScriptRunner::compileAndRunInternalScript(v8::Handle<v8::String> source, v8::Isolate* isolate, const String& fileName, const TextPosition& scriptStartPosition) 116 { 117 TRACE_EVENT0("v8", "v8.run"); 118 TRACE_EVENT_SCOPED_SAMPLING_STATE("V8", "V8Execution"); 119 v8::Handle<v8::Script> script = V8ScriptRunner::compileScript(source, fileName, scriptStartPosition, 0, isolate); 120 if (script.IsEmpty()) 121 return v8::Local<v8::Value>(); 122 123 V8RecursionScope::MicrotaskSuppression recursionScope(isolate); 124 v8::Local<v8::Value> result = script->Run(); 125 crashIfV8IsDead(); 126 return result; 127 } 128 129 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) 130 { 131 TRACE_EVENT0("v8", "v8.callFunction"); 132 TRACE_EVENT_SCOPED_SAMPLING_STATE("V8", "V8Execution"); 133 134 if (V8RecursionScope::recursionLevel(isolate) >= kMaxRecursionDepth) 135 return handleMaxRecursionDepthExceeded(isolate); 136 137 RELEASE_ASSERT(!context->isIteratingOverObservers()); 138 139 V8RecursionScope recursionScope(isolate, context); 140 v8::Local<v8::Value> result = function->Call(receiver, argc, args); 141 crashIfV8IsDead(); 142 return result; 143 } 144 145 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) 146 { 147 TRACE_EVENT0("v8", "v8.callFunction"); 148 TRACE_EVENT_SCOPED_SAMPLING_STATE("V8", "V8Execution"); 149 V8RecursionScope::MicrotaskSuppression recursionScope(isolate); 150 v8::Local<v8::Value> result = function->Call(receiver, argc, args); 151 crashIfV8IsDead(); 152 return result; 153 } 154 155 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[]) 156 { 157 TRACE_EVENT0("v8", "v8.callFunction"); 158 TRACE_EVENT_SCOPED_SAMPLING_STATE("V8", "V8Execution"); 159 160 V8RecursionScope::MicrotaskSuppression recursionScope(isolate); 161 v8::Local<v8::Value> result = object->CallAsFunction(receiver, argc, args); 162 crashIfV8IsDead(); 163 return result; 164 } 165 166 v8::Local<v8::Object> V8ScriptRunner::instantiateObject(v8::Isolate* isolate, v8::Handle<v8::ObjectTemplate> objectTemplate) 167 { 168 TRACE_EVENT0("v8", "v8.newInstance"); 169 TRACE_EVENT_SCOPED_SAMPLING_STATE("V8", "V8Execution"); 170 171 V8RecursionScope::MicrotaskSuppression scope(isolate); 172 v8::Local<v8::Object> result = objectTemplate->NewInstance(); 173 crashIfV8IsDead(); 174 return result; 175 } 176 177 v8::Local<v8::Object> V8ScriptRunner::instantiateObject(v8::Isolate* isolate, v8::Handle<v8::Function> function, int argc, v8::Handle<v8::Value> argv[]) 178 { 179 TRACE_EVENT0("v8", "v8.newInstance"); 180 TRACE_EVENT_SCOPED_SAMPLING_STATE("V8", "V8Execution"); 181 182 V8RecursionScope::MicrotaskSuppression scope(isolate); 183 v8::Local<v8::Object> result = function->NewInstance(argc, argv); 184 crashIfV8IsDead(); 185 return result; 186 } 187 188 v8::Local<v8::Object> V8ScriptRunner::instantiateObjectInDocument(v8::Isolate* isolate, v8::Handle<v8::Function> function, ExecutionContext* context, int argc, v8::Handle<v8::Value> argv[]) 189 { 190 TRACE_EVENT0("v8", "v8.newInstance"); 191 TRACE_EVENT_SCOPED_SAMPLING_STATE("V8", "V8Execution"); 192 V8RecursionScope scope(isolate, context); 193 v8::Local<v8::Object> result = function->NewInstance(argc, argv); 194 crashIfV8IsDead(); 195 return result; 196 } 197 198 } // namespace WebCore 199
