Class DTFJJavaStackFrame
java.lang.Object
com.ibm.j9ddr.vm29.view.dtfj.java.DTFJJavaStackFrame
- All Implemented Interfaces:
JavaLocation
,JavaStackFrame
Combined JavaStackFrame invalid input: '&' JavaLocation
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Constructor Summary
ConstructorDescriptionDTFJJavaStackFrame
(DTFJJavaThread dtfjJavaThread, DTFJJavaMethod dtfjMethod, com.ibm.j9ddr.vm29.pointer.generated.J9MethodPointer method, ImagePointer pc, ImagePointer basePointer, U8Pointer bytecodePCOffset, boolean jitted) -
Method Summary
Modifier and TypeMethodDescriptionboolean
Compares the argument to the receiver, and answers true if they represent the same object using a class specific comparison.Fetches the absolute address of the code which this location represents.Get a pointer to the base of this stack frameint
Get the compilation level for this location.Get the source file name.Get the set of object roots from this stack frame.int
Get the line number.Get the location at which the method owning this frame is currently executingGet the method which contains the point of execution.int
hashCode()
Answers an integer hash code for the receiver.toString()
Answers a string containing a concise, human-readable description of the receiver.
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Constructor Details
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DTFJJavaStackFrame
public DTFJJavaStackFrame(DTFJJavaThread dtfjJavaThread, DTFJJavaMethod dtfjMethod, com.ibm.j9ddr.vm29.pointer.generated.J9MethodPointer method, ImagePointer pc, ImagePointer basePointer, U8Pointer bytecodePCOffset, boolean jitted)
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Method Details
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getBasePointer
Description copied from interface:JavaStackFrame
Get a pointer to the base of this stack frame- Specified by:
getBasePointer
in interfaceJavaStackFrame
- Returns:
- the base pointer of the stack frame
- Throws:
CorruptDataException
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getHeapRoots
Description copied from interface:JavaStackFrame
Get the set of object roots from this stack frame.- Specified by:
getHeapRoots
in interfaceJavaStackFrame
- Returns:
- an iterator of JavaReferences
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getLocation
Description copied from interface:JavaStackFrame
Get the location at which the method owning this frame is currently executing- Specified by:
getLocation
in interfaceJavaStackFrame
- Returns:
- a location object describing where the frame is executing
- Throws:
CorruptDataException
- See Also:
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getAddress
Description copied from interface:JavaLocation
Fetches the absolute address of the code which this location represents. This pointer will be contained within one of the segments returned by getBytecodeSections() or getCompiledSections() of the method returned by getMethod().null may be returned, particularly for methods with no bytecode or compiled sections (e.g. some native methods)
Although an offset into the method may be calculated using this pointer, caution should be exercised in attempting to map this offset to an offset within the original class file. Various transformations may have been applied to the bytecodes by the VM or other agents which may make the offset difficult to interpret.
For native methods, the address may be meaningless.
- Specified by:
getAddress
in interfaceJavaLocation
- Returns:
- the address in memory of the managed code
- Throws:
CorruptDataException
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getCompilationLevel
Description copied from interface:JavaLocation
Get the compilation level for this location. This is an implementation defined number indicating the level at which the current location was compiled. 0 indicates interpreted. Any positive number indicates some level of JIT compilation. Typically, higher numbers indicate more aggressive compilation strategiesFor native methods, a non-zero compilation level indicates that some level of JIT compilation has been applied to the native call (e.g. a custom native call stub). To determine if the method is native, use getMethod().getModifiers().
- Specified by:
getCompilationLevel
in interfaceJavaLocation
- Returns:
- the compilation level
- Throws:
CorruptDataException
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getFilename
Description copied from interface:JavaLocation
Get the source file name.- Specified by:
getFilename
in interfaceJavaLocation
- Returns:
- the name of the source file, if available, or throws DataUnavailable if it is not available
- Throws:
DataUnavailable
- if the source file name is unavailable in the coreCorruptDataException
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getLineNumber
Description copied from interface:JavaLocation
Get the line number.- Specified by:
getLineNumber
in interfaceJavaLocation
- Returns:
- the line number, if available, or throws DataUnavailable if it is not available Line numbers are counted from 1
- Throws:
DataUnavailable
- if the line number data is not available for this locationCorruptDataException
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getMethod
Description copied from interface:JavaLocation
Get the method which contains the point of execution.- Specified by:
getMethod
in interfaceJavaLocation
- Returns:
- the method which contains the point of execution
- Throws:
CorruptDataException
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equals
Description copied from class:java.lang.Object
Compares the argument to the receiver, and answers true if they represent the same object using a class specific comparison. The implementation in Object answers true only if the argument is the exact same object as the receiver (==).- Specified by:
equals
in interfaceJavaLocation
- Specified by:
equals
in interfaceJavaStackFrame
- Overrides:
equals
in classObject
- Parameters:
obj
-- Returns:
- True if the given object refers to the same Java Stack Frame in the image
- See Also:
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hashCode
public int hashCode()Description copied from class:java.lang.Object
Answers an integer hash code for the receiver. Any two objects which answertrue
when passed to.equals
must answer the same value for this method.- Specified by:
hashCode
in interfaceJavaLocation
- Specified by:
hashCode
in interfaceJavaStackFrame
- Overrides:
hashCode
in classObject
- Returns:
- the receiver's hash.
- See Also:
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toString
Description copied from class:java.lang.Object
Answers a string containing a concise, human-readable description of the receiver.- Specified by:
toString
in interfaceJavaLocation
- Overrides:
toString
in classObject
- Returns:
- A string representing the location as it would be seen in a Java stack trace
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