[HARMONY-1942] [drlvm] Back-branch polling TLS offset is incorrect. Stability and performance fix

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Component/s: DRLVM
• Assignee: Weldon Washburn
• Reporter: Mikhail Fursov
• Created: 24/Oct/06 06:41
• Updated: 02/May/13 02:29
• Resolved: 26/Oct/06 13:29

Description

The suspend flag's TLS offset used by JIT agorithms was incorrect after the latest merge of TM.
As the result every loop iteration BBP algorithm uses slow path.

This patch
1) Fixes the problem
2) Adds new functionality to TM: the UDATA VMCALL hythread_tls_get_offset(hythread_tls_key_t key) method.
3) Removes jit_private data field from HyThread
3) Fix JIT to always use allocation algorithm for TLS keys, not hardcoded values.

Issue Links

• is depended upon by: HARMONY-1949 [drlvm][gc_cc] Refactoring TLS access in GC_CC.