JDK-8231764 : Shenandoah: SBSA::load_at() should save/restore registers when calling SATB barrier
  • Type: Bug
  • Component: hotspot
  • Sub-Component: gc
  • Affected Version: 14
  • Priority: P3
  • Status: Closed
  • Resolution: Duplicate
  • Submitted: 2019-10-02
  • Updated: 2019-11-18
  • Resolved: 2019-11-18
Related Reports
Duplicate :  
JDK-8233500 - Shenandoah: Shenandoah load barrier should save registers before calling keep alive barrier on x86
Description
This appears to be the root cause of intermittent failures with concurrent GC with concurrent class unloading on(x86_64 and x86_32).

Registers should be saved and restored for calling shenandoah_write_barrier_pre(), which can mess up the registers, especially, on slow path.