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
toScriptCallFrame(v8::Handle<v8::StackFrame> frame)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
toScriptCallFramesVector(v8::Handle<v8::StackTrace> stackTrace,Vector<ScriptCallFrame> & scriptCallFrames,size_t maxStackSize,bool emptyStackIsAllowed)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
createScriptCallStack(v8::Handle<v8::StackTrace> stackTrace,size_t maxStackSize,bool emptyStackIsAllowed)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
createScriptCallStack(v8::Handle<v8::StackTrace> stackTrace,size_t maxStackSize)90 PassRefPtr<ScriptCallStack> createScriptCallStack(v8::Handle<v8::StackTrace> stackTrace, size_t maxStackSize)
91 {
92 return createScriptCallStack(stackTrace, maxStackSize, true);
93 }
94
createScriptCallStack(size_t maxStackSize,bool emptyStackIsAllowed)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
createScriptArguments(const v8::Arguments & v8arguments,unsigned skipArgumentCount)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