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Memory.Manager
Class GCMapIteratorGroup  

java.lang.Object
  Memory.Manager.GCMapIteratorGroup

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public class GCMapIteratorGroup

extends java.lang.Object

Version:

$Id: GCMapIteratorGroup.java,v 1.2 2003/05/12 10:05:19 joewhaley Exp $

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Field Summary
private  GCMapIterator	bootImageCompilerIterator           iterator for VM_BootImageCompiler stackframes
private  GCMapIterator	fallbackCompilerIterator           iterator for fallback compiler (baseline) stackframes
private  GCMapIterator	hardwareTrapIterator           iterator for VM_HardwareTrap stackframes
private  GCMapIterator	jniIterator           iterator for JNI Java -> C stackframes
private  Memory.Address[]	registerLocations           current location (memory address) of each gpr register
private  GCMapIterator	runtimeCompilerIterator           iterator for VM_RuntimeCompiler stackframes
private  GCMapIterator	testOptCompilerIterator           iterator for test compiler (opt) stackframes

 

Constructor Summary
(package private)	GCMapIteratorGroup()

 

Method Summary
(package private)  GCMapIterator	getJniIterator()           get the GCMapIterator used for scanning JNI native stack frames.
(package private)  void	newStackWalk(Scheduler.jq_Thread thread)           Prepare to scan a thread's stack for object references.
(package private)  GCMapIterator	selectIterator(Clazz.jq_CompiledCode compiledMethod)           Select iterator for scanning for object references in a stackframe.

 

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Field Detail

registerLocations

private Memory.Address[] registerLocations

current location (memory address) of each gpr register

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bootImageCompilerIterator

private GCMapIterator bootImageCompilerIterator

iterator for VM_BootImageCompiler stackframes

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runtimeCompilerIterator

private GCMapIterator runtimeCompilerIterator

iterator for VM_RuntimeCompiler stackframes

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hardwareTrapIterator

private GCMapIterator hardwareTrapIterator

iterator for VM_HardwareTrap stackframes

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fallbackCompilerIterator

private GCMapIterator fallbackCompilerIterator

iterator for fallback compiler (baseline) stackframes

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testOptCompilerIterator

private GCMapIterator testOptCompilerIterator

iterator for test compiler (opt) stackframes

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jniIterator

private GCMapIterator jniIterator

iterator for JNI Java -> C stackframes

Constructor Detail

GCMapIteratorGroup

GCMapIteratorGroup()

Method Detail

newStackWalk

void newStackWalk(Scheduler.jq_Thread thread)

Prepare to scan a thread's stack for object references. Called by collector threads when beginning to scan a threads stack. Calls newStackWalk for each of the contained GCMapIterators.

Assumption: the thread is currently suspended, ie. its saved gprs[] contain the thread's full register state.

Side effect: registerLocations[] initialized with pointers to the thread's saved gprs[] (in thread.contextRegisters.gprs)

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selectIterator

GCMapIterator selectIterator(Clazz.jq_CompiledCode compiledMethod)

Select iterator for scanning for object references in a stackframe. Called by collector threads while scanning a threads stack.

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getJniIterator

GCMapIterator getJniIterator()

get the GCMapIterator used for scanning JNI native stack frames.

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