Port JITServer to Power

[dchopra001]

This issue will be used to track all the PRs I will be opening to implement JITServer support on Power. See #6914 for a similar issue for Z.

Below is the list of PRs:

JITServer Branch

• JITServer Compilation Fixes for Power: JITServer Compilation Fixes for Power #6990
• Direct call fixes for JITServer on Power: Direct call fixes for JITServer on Power #7384
• Disable use of TR_VMField on JITServer: Disable use of TR_VMField on JITServer #7385
• Use JITServer check to create a relocation record for interface calls on Power: Use JITServer check to create a relocation record for interface calls on Power #7386
• Disable JNI specialCasing of java_util_zip_CRC32_updateBytes: Disable JNI specialCasing of java_util_zip_CRC32_updateBytes #7391
• Add JITServer assert in getJITTedbodyInfoFromPC: Add JITServer assert in getJITTedbodyInfoFromPC #7392

Master Branch

• Add TR_MethodCallAddress to the relo runtimes table on Power: Add TR_MethodCallAddress to the relo runtimes table on Power #7383
• Enable reloLogging for JITServer: Enable reloLogging for JITServer #7388
• Use FE query to do instanceOfOrCheckcast check on Power: Use FE query to do instanceOfOrCheckcast check on Power #7390
• Use FE query to get ROM method from RAM method: Use FE query to get ROM method from RAM method #7393
• Create relocatable code when inlining string hash code Don't inline java_lang_String_hashCodeImplDecompressed in JITSe… #7387
• Update loadAddressConstant call to generate relocatable code on JITServer: Update loadAddressConstant call to generate relocatable code on… #7389
• Override needRelocationsForLookupEvaluationData: Override needRelocationsForLookupEvaluationData #7793
• Update consumers of loadAddressConstant API: Update consumers of loadAddressConstant API #7796
• Override CG query to decide when to emit data: Override CG query to decide when to emit data #7815
• Add new needRelocationsForCurrentMethodPC query: Add new needRelocationsForCurrentMethodPC query #7959
• Disable TOC for Remote Compilations: Disable TOC for Remote Compilations #7958

[dchopra001]

@mpirvu FYI

[dchopra001]

@mpirvu I have updated the comment with all the changes I have on the OpenJ9 side. Except for the one item that's still WIP, everything else is ready for review.

@ymanton I got your help for many of the fixes here, and so it'll be helpful if you are able to review these PRs as well.

@gita-omr It'd be great if you are able to take a quick look (especially the PRs targeting the master branch) also as most of these changes are going into the power codegen.

[gita-omr]

I took a look at the master branch PRs and they LGTM. Thanks!

[dchopra001]

OMR PRs can be tracked here: eclipse-omr/omr#4464

[dchopra001]

Just a note: the two PRs remaining here depend on an OMR PR which hasn't been merged yet. It should be easy to push these through once that one has been merged.

[dchopra001]

A few of the PRs above need to be double delivered. I'm making a list of the new PRs here:

• Direct call fixes for JITServer on Power: Direct call fixes for JITServer on Power #7801
• Disable use of TR_VMField on JITServer: Disable use of TR_VMField on JITServer #7802
• Use JITServer check to create a relocation record for interface calls on Power: Use JITServer check to create a relocation record for interface calls on Power #7803
• Disable JNI specialCasing of java_util_zip_CRC32_updateBytes: Disable JNI specialCasing of java_util_zip_CRC32_updateBytes #7804

[mpirvu]

I think that the port on Power has finished, so this issue can be closed now.
@dchopra001 if I am mistaken, please reopen.