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26 #ifndef StackVisitor_h
27 #define StackVisitor_h
29 #include "VMEntryRecord.h"
30 #include <wtf/text/WTFString.h>
35 struct InlineCallFrame;
42 class ClonedArguments;
45 typedef ExecState CallFrame;
59 size_t index() const { return m_index; }
60 size_t argumentCountIncludingThis() const { return m_argumentCountIncludingThis; }
61 bool callerIsVMEntryFrame() const { return m_callerIsVMEntryFrame; }
62 CallFrame* callerFrame() const { return m_callerFrame; }
63 JSObject* callee() const { return m_callee; }
64 CodeBlock* codeBlock() const { return m_codeBlock; }
65 unsigned bytecodeOffset() const { return m_bytecodeOffset; }
67 InlineCallFrame* inlineCallFrame() const { return m_inlineCallFrame; }
70 bool isJSFrame() const { return !!codeBlock(); }
72 bool isInlinedFrame() const { return !!m_inlineCallFrame; }
75 JS_EXPORT_PRIVATE String functionName();
76 JS_EXPORT_PRIVATE String sourceURL();
77 JS_EXPORT_PRIVATE String toString();
79 CodeType codeType() const;
80 JS_EXPORT_PRIVATE void computeLineAndColumn(unsigned& line, unsigned& column);
82 ClonedArguments* createArguments();
83 VMEntryFrame* vmEntryFrame() const { return m_VMEntryFrame; }
84 CallFrame* callFrame() const { return m_callFrame; }
86 JS_EXPORT_PRIVATE void print(int indentLevel);
92 void retrieveExpressionInfo(int& divot, int& startOffset, int& endOffset, unsigned& line, unsigned& column);
96 size_t m_argumentCountIncludingThis;
97 VMEntryFrame* m_VMEntryFrame;
98 VMEntryFrame* m_CallerVMEntryFrame;
99 CallFrame* m_callerFrame;
101 CodeBlock* m_codeBlock;
102 unsigned m_bytecodeOffset;
103 bool m_callerIsVMEntryFrame;
105 InlineCallFrame* m_inlineCallFrame;
107 CallFrame* m_callFrame;
109 friend class StackVisitor;
117 // StackVisitor::visit() expects a Functor that implements the following method:
118 // Status operator()(StackVisitor&);
120 template <typename Functor>
121 static void visit(CallFrame* startFrame, Functor& functor)
123 StackVisitor visitor(startFrame);
124 while (visitor->callFrame()) {
125 Status status = functor(visitor);
126 if (status != Continue)
128 visitor.gotoNextFrame();
132 Frame& operator*() { return m_frame; }
133 ALWAYS_INLINE Frame* operator->() { return &m_frame; }
134 CodeBlock* unwindToMachineCodeBlockFrame();
137 JS_EXPORT_PRIVATE StackVisitor(CallFrame* startFrame);
139 JS_EXPORT_PRIVATE void gotoNextFrame();
141 void readFrame(CallFrame*);
142 void readNonInlinedFrame(CallFrame*, CodeOrigin* = 0);
144 void readInlinedFrame(CallFrame*, CodeOrigin*);
150 class CallerFunctor {
153 : m_hasSkippedFirstFrame(false)
158 CallFrame* callerFrame() const { return m_callerFrame; }
160 StackVisitor::Status operator()(StackVisitor& visitor)
162 if (!m_hasSkippedFirstFrame) {
163 m_hasSkippedFirstFrame = true;
164 return StackVisitor::Continue;
167 m_callerFrame = visitor->callFrame();
168 return StackVisitor::Done;
172 bool m_hasSkippedFirstFrame;
173 CallFrame* m_callerFrame;
178 #endif // StackVisitor_h