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      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 "bindings/v8/ScriptCallStackFactory.h"
     33 
     34 #include "bindings/v8/ScriptScope.h"
     35 #include "bindings/v8/ScriptValue.h"
     36 #include "bindings/v8/V8Binding.h"
     37 #include "bindings/v8/V8Utilities.h"
     38 #include "core/inspector/InspectorInstrumentation.h"
     39 #include "core/inspector/ScriptArguments.h"
     40 #include "core/inspector/ScriptCallFrame.h"
     41 #include "core/inspector/ScriptCallStack.h"
     42 #include "platform/JSONValues.h"
     43 #include "wtf/text/StringBuilder.h"
     44 
     45 #include <v8-debug.h>
     46 
     47 namespace WebCore {
     48 
     49 class ExecutionContext;
     50 
     51 static ScriptCallFrame toScriptCallFrame(v8::Handle<v8::StackFrame> frame)
     52 {
     53     StringBuilder stringBuilder;
     54     stringBuilder.appendNumber(frame->GetScriptId());
     55     String scriptId = stringBuilder.toString();
     56     String sourceName;
     57     v8::Local<v8::String> sourceNameValue(frame->GetScriptNameOrSourceURL());
     58     if (!sourceNameValue.IsEmpty())
     59         sourceName = toCoreString(sourceNameValue);
     60 
     61     String functionName;
     62     v8::Local<v8::String> functionNameValue(frame->GetFunctionName());
     63     if (!functionNameValue.IsEmpty())
     64         functionName = toCoreString(functionNameValue);
     65 
     66     int sourceLineNumber = frame->GetLineNumber();
     67     int sourceColumn = frame->GetColumn();
     68     return ScriptCallFrame(functionName, scriptId, sourceName, sourceLineNumber, sourceColumn);
     69 }
     70 
     71 static void toScriptCallFramesVector(v8::Handle<v8::StackTrace> stackTrace, Vector<ScriptCallFrame>& scriptCallFrames, size_t maxStackSize, bool emptyStackIsAllowed, v8::Isolate* isolate)
     72 {
     73     ASSERT(isolate->InContext());
     74     int frameCount = stackTrace->GetFrameCount();
     75     if (frameCount > static_cast<int>(maxStackSize))
     76         frameCount = maxStackSize;
     77     for (int i = 0; i < frameCount; i++) {
     78         v8::Local<v8::StackFrame> stackFrame = stackTrace->GetFrame(i);
     79         scriptCallFrames.append(toScriptCallFrame(stackFrame));
     80     }
     81     if (!frameCount && !emptyStackIsAllowed) {
     82         // Successfully grabbed stack trace, but there are no frames. It may happen in case
     83         // when a bound function is called from native code for example.
     84         // Fallback to setting lineNumber to 0, and source and function name to "undefined".
     85         scriptCallFrames.append(ScriptCallFrame("undefined", "", "undefined", 0));
     86     }
     87 }
     88 
     89 static PassRefPtr<ScriptCallStack> createScriptCallStack(v8::Handle<v8::StackTrace> stackTrace, size_t maxStackSize, bool emptyStackIsAllowed, v8::Isolate* isolate)
     90 {
     91     ASSERT(isolate->InContext());
     92     v8::HandleScope scope(isolate);
     93     Vector<ScriptCallFrame> scriptCallFrames;
     94     toScriptCallFramesVector(stackTrace, scriptCallFrames, maxStackSize, emptyStackIsAllowed, isolate);
     95     return ScriptCallStack::create(scriptCallFrames);
     96 }
     97 
     98 PassRefPtr<ScriptCallStack> createScriptCallStack(v8::Handle<v8::StackTrace> stackTrace, size_t maxStackSize, v8::Isolate* isolate)
     99 {
    100     return createScriptCallStack(stackTrace, maxStackSize, true, isolate);
    101 }
    102 
    103 PassRefPtr<ScriptCallStack> createScriptCallStack(size_t maxStackSize, bool emptyStackIsAllowed)
    104 {
    105     v8::Isolate* isolate = v8::Isolate::GetCurrent();
    106     if (!isolate->InContext())
    107         return 0;
    108     v8::HandleScope handleScope(isolate);
    109     v8::Handle<v8::StackTrace> stackTrace(v8::StackTrace::CurrentStackTrace(isolate, maxStackSize, stackTraceOptions));
    110     return createScriptCallStack(stackTrace, maxStackSize, emptyStackIsAllowed, isolate);
    111 }
    112 
    113 PassRefPtr<ScriptCallStack> createScriptCallStackForConsole(size_t maxStackSize)
    114 {
    115     size_t stackSize = 1;
    116     if (InspectorInstrumentation::hasFrontends()) {
    117         ExecutionContext* executionContext = getExecutionContext();
    118         if (InspectorInstrumentation::consoleAgentEnabled(executionContext))
    119             stackSize = maxStackSize;
    120     }
    121     return createScriptCallStack(stackSize);
    122 }
    123 
    124 PassRefPtr<ScriptArguments> createScriptArguments(const v8::FunctionCallbackInfo<v8::Value>& v8arguments, unsigned skipArgumentCount)
    125 {
    126     v8::Isolate* isolate = v8arguments.GetIsolate();
    127     v8::HandleScope scope(isolate);
    128     v8::Local<v8::Context> context = isolate->GetCurrentContext();
    129     ScriptState* state = ScriptState::forContext(context);
    130 
    131     Vector<ScriptValue> arguments;
    132     for (int i = skipArgumentCount; i < v8arguments.Length(); ++i)
    133         arguments.append(ScriptValue(v8arguments[i], isolate));
    134 
    135     return ScriptArguments::create(state, arguments);
    136 }
    137 
    138 } // namespace WebCore
    139