com.oracle.svm.graal.meta.amd64

Class AMD64RuntimeCodeInstallerPlatformHelper

java.lang.Object

com.oracle.svm.graal.meta.amd64.AMD64RuntimeCodeInstallerPlatformHelper

All Implemented Interfaces:

RuntimeCodeInstaller.RuntimeCodeInstallerPlatformHelper

public class AMD64RuntimeCodeInstallerPlatformHelper
extends Object
implements RuntimeCodeInstaller.RuntimeCodeInstallerPlatformHelper

Constructor Summary

Constructors

Constructor and Description
AMD64RuntimeCodeInstallerPlatformHelper()

Method Summary

Modifier and Type	Method and Description
int	getTrampolineCallSize() The size for trampoline jumps: jmp [rip+offset]
int	insertTrampolineCalls(byte[] compiledBytes, int initialPos, Map<Long,Integer> directTargets)
void	performCodeSynchronization(CodeInfo codeInfo) Method to enable platforms to perform any needed operations before code becomes visible.
boolean	targetWithinPCDisplacement(long pcDisplacement) Checking if the pc displacement is within a signed 32 bit range.

Methods inherited from class java.lang.Object

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

Constructor Detail

AMD64RuntimeCodeInstallerPlatformHelper

public AMD64RuntimeCodeInstallerPlatformHelper()

Method Detail

getTrampolineCallSize

public int getTrampolineCallSize()

The size for trampoline jumps: jmp [rip+offset]

Trampoline jumps are added immediately after the method code, where each jump needs 6 bytes. The jump instructions reference the 8-byte destination addresses, which are allocated after the jumps.

Specified by:

getTrampolineCallSize in interface RuntimeCodeInstaller.RuntimeCodeInstallerPlatformHelper

targetWithinPCDisplacement

public boolean targetWithinPCDisplacement(long pcDisplacement)

Checking if the pc displacement is within a signed 32 bit range.

Specified by:

targetWithinPCDisplacement in interface RuntimeCodeInstaller.RuntimeCodeInstallerPlatformHelper

insertTrampolineCalls

public int insertTrampolineCalls(byte[] compiledBytes,
                                 int initialPos,
                                 Map<Long,Integer> directTargets)

Specified by:

insertTrampolineCalls in interface RuntimeCodeInstaller.RuntimeCodeInstallerPlatformHelper

performCodeSynchronization

public void performCodeSynchronization(CodeInfo codeInfo)

Description copied from interface: RuntimeCodeInstaller.RuntimeCodeInstallerPlatformHelper

Method to enable platforms to perform any needed operations before code becomes visible.

Specified by:

performCodeSynchronization in interface RuntimeCodeInstaller.RuntimeCodeInstallerPlatformHelper

Parameters:

codeInfo - the new code to be installed