diff -r 000000000000 -r 4f2f89ce4247 WebCore/bindings/v8/ScriptCallStack.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/bindings/v8/ScriptCallStack.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,182 @@
+/*
+ * Copyright (C) 2008, 2009 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "ScriptCallStack.h"
+
+#include "InspectorValues.h"
+#include "ScriptController.h"
+#include "ScriptDebugServer.h"
+#include "ScriptScope.h"
+#include "V8Binding.h"
+
+#include <v8-debug.h>
+
+namespace WebCore {
+
+static void getFrameLocation(v8::Handle<v8::StackFrame> frame, String* sourceName, int* sourceLineNumber, String* functionName)
+{
+    ASSERT(!frame.IsEmpty());
+    v8::Local<v8::String> sourceNameValue(frame->GetScriptName());
+    v8::Local<v8::String> functionNameValue(frame->GetFunctionName());
+    *sourceName = sourceNameValue.IsEmpty() ? "" : toWebCoreString(sourceNameValue);
+    *functionName = functionNameValue.IsEmpty() ? "" : toWebCoreString(functionNameValue);
+    *sourceLineNumber = frame->GetLineNumber();
+}
+
+static void getTopFrameLocation(v8::Handle<v8::StackTrace> stackTrace, String* sourceName, int* sourceLineNumber, String* functionName)
+{
+    if (stackTrace->GetFrameCount() <= 0) {
+        // Successfully grabbed stack trace, but there are no frames. It may happen in case of a syntax error for example.
+        // Fallback to setting lineNumber to 0, and source and function name to "undefined".
+        *sourceName = "undefined";
+        *sourceLineNumber = 0;
+        *functionName = "undefined";
+    } else {
+        v8::Handle<v8::StackFrame> frame = stackTrace->GetFrame(0);
+        getFrameLocation(frame, sourceName, sourceLineNumber, functionName);
+    }
+}
+
+static PassOwnPtr<ScriptCallFrame> toScriptCallFrame(v8::Handle<v8::StackFrame> frame)
+{
+    String sourceName;
+    int sourceLineNumber;
+    String functionName;
+    getFrameLocation(frame, &sourceName, &sourceLineNumber, &functionName);
+    return new ScriptCallFrame(functionName, sourceName, sourceLineNumber);
+}
+
+static void toScriptCallFramesVector(v8::Local<v8::Context> context, v8::Handle<v8::StackTrace> stackTrace, Vector<OwnPtr<ScriptCallFrame> >& scriptCallFrames)
+{
+    v8::Context::Scope contextScope(context);
+    int frameCount = stackTrace->GetFrameCount();
+    for (int i = 0; i < frameCount; i++) {
+        v8::Local<v8::StackFrame> stackFrame = stackTrace->GetFrame(i);
+        scriptCallFrames.append(toScriptCallFrame(stackFrame));
+    }
+}
+
+const int ScriptCallStack::maxCallStackSizeToCapture = 200;
+
+PassOwnPtr<ScriptCallStack> ScriptCallStack::create(const v8::Arguments& arguments, unsigned skipArgumentCount, int framCountLimit)
+{
+    v8::HandleScope scope;
+    v8::Local<v8::Context> context = v8::Context::GetCurrent();
+    v8::Context::Scope contextScope(context);
+    v8::Handle<v8::StackTrace> stackTrace(v8::StackTrace::CurrentStackTrace(framCountLimit));
+
+    if (stackTrace.IsEmpty())
+        return 0;
+
+    String sourceName;
+    int sourceLineNumber;
+    String functionName;
+    getTopFrameLocation(stackTrace, &sourceName, &sourceLineNumber, &functionName);
+
+    Vector<OwnPtr<ScriptCallFrame> > scriptCallFrames;
+    if (framCountLimit > 1)
+        toScriptCallFramesVector(context, stackTrace, scriptCallFrames);
+
+    return new ScriptCallStack(ScriptState::forContext(context), new ScriptCallFrame(functionName, sourceName, sourceLineNumber, arguments, skipArgumentCount), scriptCallFrames);
+}
+
+PassOwnPtr<ScriptCallStack> ScriptCallStack::create(ScriptState* state, v8::Handle<v8::StackTrace> stackTrace)
+{
+    v8::HandleScope scope;
+    Vector<OwnPtr<ScriptCallFrame> > scriptCallFrames;
+    toScriptCallFramesVector(state->context(), stackTrace, scriptCallFrames);
+
+    String sourceName;
+    int sourceLineNumber;
+    String functionName;
+    getTopFrameLocation(stackTrace, &sourceName, &sourceLineNumber, &functionName);
+
+    return new ScriptCallStack(state, new ScriptCallFrame(functionName, sourceName, sourceLineNumber), scriptCallFrames);
+}
+
+ScriptCallStack::ScriptCallStack(ScriptState* scriptState, PassOwnPtr<ScriptCallFrame> topFrame, Vector<OwnPtr<ScriptCallFrame> >& scriptCallFrames)
+    : m_topFrame(topFrame)
+    , m_scriptState(scriptState)
+{
+    m_scriptCallFrames.swap(scriptCallFrames);
+}
+
+ScriptCallStack::~ScriptCallStack()
+{
+}
+
+const ScriptCallFrame& ScriptCallStack::at(unsigned index)
+{
+    if (!index && m_topFrame)
+        return *m_topFrame;
+    return *m_scriptCallFrames.at(index);
+}
+
+unsigned ScriptCallStack::size()
+{
+    if (m_scriptCallFrames.isEmpty())
+        return 1;
+    return m_scriptCallFrames.size();
+}
+
+
+bool ScriptCallStack::stackTrace(int frameLimit, const RefPtr<InspectorArray>& stackTrace)
+{
+#if ENABLE(INSPECTOR)
+    if (!v8::Context::InContext())
+        return false;
+    v8::Handle<v8::Context> context = v8::Context::GetCurrent();
+    if (context.IsEmpty())
+        return false;
+    v8::HandleScope scope;
+    v8::Context::Scope contextScope(context);
+    v8::Handle<v8::StackTrace> trace(v8::StackTrace::CurrentStackTrace(frameLimit));
+    int frameCount = trace->GetFrameCount();
+    if (trace.IsEmpty() || !frameCount)
+        return false;
+    for (int i = 0; i < frameCount; ++i) {
+        v8::Handle<v8::StackFrame> frame = trace->GetFrame(i);
+        RefPtr<InspectorObject> frameObject = InspectorObject::create();
+        v8::Local<v8::String> scriptName = frame->GetScriptName();
+        frameObject->setString("scriptName", scriptName.IsEmpty() ? "" : toWebCoreString(scriptName));
+        v8::Local<v8::String> functionName = frame->GetFunctionName();
+        frameObject->setString("functionName", functionName.IsEmpty() ? "" : toWebCoreString(functionName));
+        frameObject->setNumber("lineNumber", frame->GetLineNumber());
+        frameObject->setNumber("column", frame->GetColumn());
+        stackTrace->push(frameObject);
+    }
+    return true;
+#else
+    return false;
+#endif
+}
+
+} // namespace WebCore