1 /* 2 * Copyright (c) 2010 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 are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include "config.h" 32 #include "ScriptCallStackFactory.h" 33 34 #include "InspectorValues.h" 35 #include "ScriptArguments.h" 36 #include "ScriptCallFrame.h" 37 #include "ScriptCallStack.h" 38 #include "ScriptScope.h" 39 #include "ScriptValue.h" 40 #include "V8Binding.h" 41 42 #include <v8-debug.h> 43 44 namespace WebCore { 45 46 static ScriptCallFrame toScriptCallFrame(v8::Handle<v8::StackFrame> frame) 47 { 48 String sourceName; 49 v8::Local<v8::String> sourceNameValue(frame->GetScriptNameOrSourceURL()); 50 if (!sourceNameValue.IsEmpty()) 51 sourceName = toWebCoreString(sourceNameValue); 52 53 String functionName; 54 v8::Local<v8::String> functionNameValue(frame->GetFunctionName()); 55 if (!functionNameValue.IsEmpty()) 56 functionName = toWebCoreString(functionNameValue); 57 58 int sourceLineNumber = frame->GetLineNumber(); 59 int sourceColumn = frame->GetColumn(); 60 return ScriptCallFrame(functionName, sourceName, sourceLineNumber, sourceColumn); 61 } 62 63 static void toScriptCallFramesVector(v8::Handle<v8::StackTrace> stackTrace, Vector<ScriptCallFrame>& scriptCallFrames, size_t maxStackSize, bool emptyStackIsAllowed) 64 { 65 ASSERT(v8::Context::InContext()); 66 int frameCount = stackTrace->GetFrameCount(); 67 if (frameCount > static_cast<int>(maxStackSize)) 68 frameCount = maxStackSize; 69 for (int i = 0; i < frameCount; i++) { 70 v8::Local<v8::StackFrame> stackFrame = stackTrace->GetFrame(i); 71 scriptCallFrames.append(toScriptCallFrame(stackFrame)); 72 } 73 if (!frameCount && !emptyStackIsAllowed) { 74 // Successfully grabbed stack trace, but there are no frames. It may happen in case 75 // when a bound function is called from native code for example. 76 // Fallback to setting lineNumber to 0, and source and function name to "undefined". 77 scriptCallFrames.append(ScriptCallFrame("undefined", "undefined", 0)); 78 } 79 } 80 81 static PassRefPtr<ScriptCallStack> createScriptCallStack(v8::Handle<v8::StackTrace> stackTrace, size_t maxStackSize, bool emptyStackIsAllowed) 82 { 83 ASSERT(v8::Context::InContext()); 84 v8::HandleScope scope; 85 Vector<ScriptCallFrame> scriptCallFrames; 86 toScriptCallFramesVector(stackTrace, scriptCallFrames, maxStackSize, emptyStackIsAllowed); 87 return ScriptCallStack::create(scriptCallFrames); 88 } 89 90 PassRefPtr<ScriptCallStack> createScriptCallStack(v8::Handle<v8::StackTrace> stackTrace, size_t maxStackSize) 91 { 92 return createScriptCallStack(stackTrace, maxStackSize, true); 93 } 94 95 PassRefPtr<ScriptCallStack> createScriptCallStack(size_t maxStackSize, bool emptyStackIsAllowed) 96 { 97 if (!v8::Context::InContext()) 98 return 0; 99 v8::HandleScope handleScope; 100 v8::Handle<v8::StackTrace> stackTrace(v8::StackTrace::CurrentStackTrace(maxStackSize, stackTraceOptions)); 101 return createScriptCallStack(stackTrace, maxStackSize, emptyStackIsAllowed); 102 } 103 104 PassRefPtr<ScriptArguments> createScriptArguments(const v8::Arguments& v8arguments, unsigned skipArgumentCount) 105 { 106 v8::HandleScope scope; 107 v8::Local<v8::Context> context = v8::Context::GetCurrent(); 108 ScriptState* state = ScriptState::forContext(context); 109 110 Vector<ScriptValue> arguments; 111 for (int i = skipArgumentCount; i < v8arguments.Length(); ++i) 112 arguments.append(ScriptValue(v8arguments[i])); 113 114 return ScriptArguments::create(state, arguments); 115 } 116 117 } // namespace WebCore 118