1 files changed, 208 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/interpreter/CallFrame.cpp b/Source/JavaScriptCore/interpreter/CallFrame.cpp
new file mode 100644
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+++ b/Source/JavaScriptCore/interpreter/CallFrame.cpp
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+/*
+ * Copyright (C) 2008, 2013, 2014 Apple 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:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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 "CallFrame.h"
+
+#include "CallFrameInlines.h"
+#include "CodeBlock.h"
+#include "Interpreter.h"
+#include "JSLexicalEnvironment.h"
+#include "JSCInlines.h"
+#include "VMEntryScope.h"
+#include <wtf/StringPrintStream.h>
+
+namespace JSC {
+
+#ifndef NDEBUG
+JSStack* CallFrame::stack()
+{
+    return &interpreter()->stack();
+}
+
+#endif
+
+#if USE(JSVALUE32_64)
+unsigned CallFrame::locationAsBytecodeOffset() const
+{
+    ASSERT(codeBlock());
+    ASSERT(hasLocationAsBytecodeOffset());
+    return currentVPC() - codeBlock()->instructions().begin();
+}
+
+void CallFrame::setLocationAsBytecodeOffset(unsigned offset)
+{
+    ASSERT(codeBlock());
+    setCurrentVPC(codeBlock()->instructions().begin() + offset);
+    ASSERT(hasLocationAsBytecodeOffset());
+}
+#else
+Instruction* CallFrame::currentVPC() const
+{
+    return codeBlock()->instructions().begin() + locationAsBytecodeOffset();
+}
+void CallFrame::setCurrentVPC(Instruction* vpc)
+{
+    setLocationAsBytecodeOffset(vpc - codeBlock()->instructions().begin());
+}
+#endif
+    
+#if ENABLE(DFG_JIT)
+unsigned CallFrame::bytecodeOffsetFromCodeOriginIndex()
+{
+    ASSERT(hasLocationAsCodeOriginIndex());
+    CodeBlock* codeBlock = this->codeBlock();
+    ASSERT(codeBlock);
+
+    CodeOrigin codeOrigin;
+    unsigned index = locationAsCodeOriginIndex();
+    ASSERT(codeBlock->canGetCodeOrigin(index));
+    codeOrigin = codeBlock->codeOrigin(index);
+
+    for (InlineCallFrame* inlineCallFrame = codeOrigin.inlineCallFrame; inlineCallFrame;) {
+        if (inlineCallFrame->baselineCodeBlock() == codeBlock)
+            return codeOrigin.bytecodeIndex;
+
+        codeOrigin = inlineCallFrame->caller;
+        inlineCallFrame = codeOrigin.inlineCallFrame;
+    }
+    return codeOrigin.bytecodeIndex;
+}
+
+#endif // ENABLE(DFG_JIT)
+
+unsigned CallFrame::bytecodeOffset()
+{
+    if (!codeBlock())
+        return 0;
+#if ENABLE(DFG_JIT)
+    if (hasLocationAsCodeOriginIndex())
+        return bytecodeOffsetFromCodeOriginIndex();
+#endif
+    return locationAsBytecodeOffset();
+}
+
+CodeOrigin CallFrame::codeOrigin()
+{
+    if (!codeBlock())
+        return CodeOrigin(0);
+#if ENABLE(DFG_JIT)
+    if (hasLocationAsCodeOriginIndex()) {
+        unsigned index = locationAsCodeOriginIndex();
+        ASSERT(codeBlock()->canGetCodeOrigin(index));
+        return codeBlock()->codeOrigin(index);
+    }
+#endif
+    return CodeOrigin(locationAsBytecodeOffset());
+}
+
+Register* CallFrame::topOfFrameInternal()
+{
+    CodeBlock* codeBlock = this->codeBlock();
+    ASSERT(codeBlock);
+    return registers() + codeBlock->stackPointerOffset();
+}
+
+JSGlobalObject* CallFrame::vmEntryGlobalObject()
+{
+    if (this == lexicalGlobalObject()->globalExec())
+        return lexicalGlobalObject();
+
+    // For any ExecState that's not a globalExec, the 
+    // dynamic global object must be set since code is running
+    ASSERT(vm().entryScope);
+    return vm().entryScope->globalObject();
+}
+
+CallFrame* CallFrame::callerFrame(VMEntryFrame*& currVMEntryFrame)
+{
+    if (callerFrameOrVMEntryFrame() == currVMEntryFrame) {
+        VMEntryRecord* currVMEntryRecord = vmEntryRecord(currVMEntryFrame);
+        currVMEntryFrame = currVMEntryRecord->prevTopVMEntryFrame();
+        return currVMEntryRecord->prevTopCallFrame();
+    }
+    return static_cast<CallFrame*>(callerFrameOrVMEntryFrame());
+}
+
+JSLexicalEnvironment* CallFrame::lexicalEnvironment() const
+{
+    CodeBlock* codeBlock = this->codeBlock();
+    RELEASE_ASSERT(codeBlock->needsActivation());
+    VirtualRegister activationRegister = codeBlock->activationRegister();
+    return registers()[activationRegister.offset()].Register::lexicalEnvironment();
+}
+
+JSLexicalEnvironment* CallFrame::lexicalEnvironmentOrNullptr() const
+{
+    CodeBlock* codeBlock = this->codeBlock();
+    return codeBlock->needsActivation() ? lexicalEnvironment() : nullptr;
+}
+    
+void CallFrame::setActivation(JSLexicalEnvironment* lexicalEnvironment)
+{
+    CodeBlock* codeBlock = this->codeBlock();
+    RELEASE_ASSERT(codeBlock->needsActivation());
+    VirtualRegister activationRegister = codeBlock->activationRegister();
+    registers()[activationRegister.offset()] = lexicalEnvironment;
+}
+
+void CallFrame::dump(PrintStream& out)
+{
+    if (CodeBlock* codeBlock = this->codeBlock()) {
+        out.print(codeBlock->inferredName(), "#", codeBlock->hashAsStringIfPossible(), " [", codeBlock->jitType(), "]");
+
+        out.print("(");
+        thisValue().dumpForBacktrace(out);
+
+        for (size_t i = 0; i < argumentCount(); ++i) {
+            out.print(", ");
+            JSValue value = argument(i);
+            value.dumpForBacktrace(out);
+        }
+
+        out.print(")");
+
+        return;
+    }
+
+    out.print(returnPC());
+}
+
+const char* CallFrame::describeFrame()
+{
+    const size_t bufferSize = 200;
+    static char buffer[bufferSize + 1];
+    
+    WTF::StringPrintStream stringStream;
+
+    dump(stringStream);
+
+    strncpy(buffer, stringStream.toCString().data(), bufferSize);
+    buffer[bufferSize] = '\0';
+    
+    return buffer;
+}
+
+} // namespace JSC