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.
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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
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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 "core/inspector/JavaScriptCallFrame.h"
33
34#include "bindings/core/v8/ScriptValue.h"
35#include "bindings/core/v8/V8Binding.h"
36#include <v8-debug.h>
37
38namespace blink {
39
40JavaScriptCallFrame::JavaScriptCallFrame(v8::Handle<v8::Context> debuggerContext, v8::Handle<v8::Object> callFrame)
41    : m_isolate(v8::Isolate::GetCurrent())
42    , m_debuggerContext(m_isolate, debuggerContext)
43    , m_callFrame(m_isolate, callFrame)
44{
45}
46
47JavaScriptCallFrame::~JavaScriptCallFrame()
48{
49}
50
51JavaScriptCallFrame* JavaScriptCallFrame::caller()
52{
53    if (!m_caller) {
54        v8::HandleScope handleScope(m_isolate);
55        v8::Handle<v8::Context> debuggerContext = m_debuggerContext.newLocal(m_isolate);
56        v8::Context::Scope contextScope(debuggerContext);
57        v8::Handle<v8::Value> callerFrame = m_callFrame.newLocal(m_isolate)->Get(v8AtomicString(m_isolate, "caller"));
58        if (callerFrame.IsEmpty() || !callerFrame->IsObject())
59            return 0;
60        m_caller = JavaScriptCallFrame::create(debuggerContext, v8::Handle<v8::Object>::Cast(callerFrame));
61    }
62    return m_caller.get();
63}
64
65int JavaScriptCallFrame::callV8FunctionReturnInt(const char* name) const
66{
67    v8::HandleScope handleScope(m_isolate);
68    v8::Context::Scope contextScope(m_debuggerContext.newLocal(m_isolate));
69    v8::Handle<v8::Object> callFrame = m_callFrame.newLocal(m_isolate);
70    v8::Handle<v8::Function> func = v8::Handle<v8::Function>::Cast(callFrame->Get(v8AtomicString(m_isolate, name)));
71    v8::Handle<v8::Value> result = func->Call(callFrame, 0, 0);
72    if (result.IsEmpty() || !result->IsInt32())
73        return 0;
74    return result->Int32Value();
75}
76
77String JavaScriptCallFrame::callV8FunctionReturnString(const char* name) const
78{
79    v8::HandleScope handleScope(m_isolate);
80    v8::Context::Scope contextScope(m_debuggerContext.newLocal(m_isolate));
81    v8::Handle<v8::Object> callFrame = m_callFrame.newLocal(m_isolate);
82    v8::Handle<v8::Function> func = v8::Handle<v8::Function>::Cast(callFrame->Get(v8AtomicString(m_isolate, name)));
83    v8::Handle<v8::Value> result = func->Call(callFrame, 0, 0);
84    return toCoreStringWithUndefinedOrNullCheck(result);
85}
86
87int JavaScriptCallFrame::sourceID() const
88{
89    return callV8FunctionReturnInt("sourceID");
90}
91
92int JavaScriptCallFrame::line() const
93{
94    return callV8FunctionReturnInt("line");
95}
96
97int JavaScriptCallFrame::column() const
98{
99    return callV8FunctionReturnInt("column");
100}
101
102String JavaScriptCallFrame::scriptName() const
103{
104    return callV8FunctionReturnString("scriptName");
105}
106
107String JavaScriptCallFrame::functionName() const
108{
109    return callV8FunctionReturnString("functionName");
110}
111
112v8::Handle<v8::Value> JavaScriptCallFrame::scopeChain() const
113{
114    v8::Handle<v8::Object> callFrame = m_callFrame.newLocal(m_isolate);
115    v8::Handle<v8::Function> func = v8::Handle<v8::Function>::Cast(callFrame->Get(v8AtomicString(m_isolate, "scopeChain")));
116    v8::Handle<v8::Array> scopeChain = v8::Handle<v8::Array>::Cast(func->Call(callFrame, 0, 0));
117    v8::Handle<v8::Array> result = v8::Array::New(m_isolate, scopeChain->Length());
118    for (uint32_t i = 0; i < scopeChain->Length(); i++)
119        result->Set(i, scopeChain->Get(i));
120    return result;
121}
122
123int JavaScriptCallFrame::scopeType(int scopeIndex) const
124{
125    v8::Handle<v8::Array> scopeType = v8::Handle<v8::Array>::Cast(m_callFrame.newLocal(m_isolate)->Get(v8AtomicString(m_isolate, "scopeType")));
126    return scopeType->Get(scopeIndex)->Int32Value();
127}
128
129v8::Handle<v8::Value> JavaScriptCallFrame::thisObject() const
130{
131    return m_callFrame.newLocal(m_isolate)->Get(v8AtomicString(m_isolate, "thisObject"));
132}
133
134String JavaScriptCallFrame::stepInPositions() const
135{
136    return callV8FunctionReturnString("stepInPositions");
137}
138
139bool JavaScriptCallFrame::isAtReturn() const
140{
141    v8::HandleScope handleScope(m_isolate);
142    v8::Context::Scope contextScope(m_debuggerContext.newLocal(m_isolate));
143    v8::Handle<v8::Value> result = m_callFrame.newLocal(m_isolate)->Get(v8AtomicString(m_isolate, "isAtReturn"));
144    if (result.IsEmpty() || !result->IsBoolean())
145        return false;
146    return result->BooleanValue();
147}
148
149v8::Handle<v8::Value> JavaScriptCallFrame::returnValue() const
150{
151    return m_callFrame.newLocal(m_isolate)->Get(v8AtomicString(m_isolate, "returnValue"));
152}
153
154v8::Handle<v8::Value> JavaScriptCallFrame::evaluateWithExceptionDetails(const String& expression)
155{
156    v8::Handle<v8::Object> callFrame = m_callFrame.newLocal(m_isolate);
157    v8::Handle<v8::Function> evalFunction = v8::Handle<v8::Function>::Cast(callFrame->Get(v8AtomicString(m_isolate, "evaluate")));
158    v8::Handle<v8::Value> argv[] = { v8String(m_debuggerContext.newLocal(m_isolate)->GetIsolate(), expression) };
159    v8::TryCatch tryCatch;
160    v8::Handle<v8::Value> result = evalFunction->Call(callFrame, WTF_ARRAY_LENGTH(argv), argv);
161
162    v8::Handle<v8::Object> wrappedResult = v8::Object::New(m_isolate);
163    if (tryCatch.HasCaught()) {
164        wrappedResult->Set(v8::String::NewFromUtf8(m_isolate, "result"), tryCatch.Exception());
165        wrappedResult->Set(v8::String::NewFromUtf8(m_isolate, "exceptionDetails"), createExceptionDetails(tryCatch.Message(), m_isolate));
166    } else {
167        wrappedResult->Set(v8::String::NewFromUtf8(m_isolate, "result"), result);
168        wrappedResult->Set(v8::String::NewFromUtf8(m_isolate, "exceptionDetails"), v8::Undefined(m_isolate));
169    }
170    return wrappedResult;
171}
172
173v8::Handle<v8::Value> JavaScriptCallFrame::restart()
174{
175    v8::Handle<v8::Object> callFrame = m_callFrame.newLocal(m_isolate);
176    v8::Handle<v8::Function> restartFunction = v8::Handle<v8::Function>::Cast(callFrame->Get(v8AtomicString(m_isolate, "restart")));
177    v8::Debug::SetLiveEditEnabled(m_isolate, true);
178    v8::Handle<v8::Value> result = restartFunction->Call(callFrame, 0, 0);
179    v8::Debug::SetLiveEditEnabled(m_isolate, false);
180    return result;
181}
182
183ScriptValue JavaScriptCallFrame::setVariableValue(ScriptState* scriptState, int scopeNumber, const String& variableName, const ScriptValue& newValue)
184{
185    ScriptState::Scope scriptScope(scriptState);
186    v8::Handle<v8::Object> callFrame = m_callFrame.newLocal(m_isolate);
187    v8::Handle<v8::Function> setVariableValueFunction = v8::Handle<v8::Function>::Cast(callFrame->Get(v8AtomicString(m_isolate, "setVariableValue")));
188    v8::Handle<v8::Value> argv[] = {
189        v8::Handle<v8::Value>(v8::Integer::New(m_isolate, scopeNumber)),
190        v8String(m_isolate, variableName),
191        newValue.v8Value()
192    };
193    return ScriptValue(scriptState, setVariableValueFunction->Call(callFrame, WTF_ARRAY_LENGTH(argv), argv));
194}
195
196v8::Handle<v8::Object> JavaScriptCallFrame::createExceptionDetails(v8::Handle<v8::Message> message, v8::Isolate* isolate)
197{
198    v8::Handle<v8::Object> exceptionDetails = v8::Object::New(isolate);
199    exceptionDetails->Set(v8::String::NewFromUtf8(isolate, "text"), message->Get());
200    exceptionDetails->Set(v8::String::NewFromUtf8(isolate, "url"), message->GetScriptOrigin().ResourceName());
201    exceptionDetails->Set(v8::String::NewFromUtf8(isolate, "line"), v8::Integer::New(isolate, message->GetLineNumber()));
202    exceptionDetails->Set(v8::String::NewFromUtf8(isolate, "column"), v8::Integer::New(isolate, message->GetStartColumn()));
203    if (!message->GetStackTrace().IsEmpty())
204        exceptionDetails->Set(v8::String::NewFromUtf8(isolate, "stackTrace"), message->GetStackTrace()->AsArray());
205    else
206        exceptionDetails->Set(v8::String::NewFromUtf8(isolate, "stackTrace"), v8::Undefined(isolate));
207    return exceptionDetails;
208}
209
210void JavaScriptCallFrame::trace(Visitor* visitor)
211{
212    visitor->trace(m_caller);
213}
214
215} // namespace blink
216