src/cpu/aarch64/vm/sharedRuntime_aarch64.cpp

rev 7516 : 8069593: AARCH64: Changes to JavaThread::_thread_state must use acquire and release
Summary: Use release stores for all changes to thread state.
Reviewed-by: kvn

*** 1843,1853 ****
      __ lea(c_rarg0, Address(rthread, in_bytes(JavaThread::jni_environment_offset())));
    }
  
    // Now set thread in native
    __ mov(rscratch1, _thread_in_native);
!   __ str(rscratch1, Address(rthread, JavaThread::thread_state_offset()));
  
    {
      int return_type = 0;
      switch (ret_type) {
      case T_VOID: break;
--- 1843,1854 ----
      __ lea(c_rarg0, Address(rthread, in_bytes(JavaThread::jni_environment_offset())));
    }
  
    // Now set thread in native
    __ mov(rscratch1, _thread_in_native);
!   __ lea(rscratch2, Address(rthread, JavaThread::thread_state_offset()));
!   __ stlrw(rscratch1, rscratch2);
  
    {
      int return_type = 0;
      switch (ret_type) {
      case T_VOID: break;
*** 1900,1910 ****
    //     Java thread A, in _thread_in_native state, loads _not_synchronized and is preempted.
    //     VM thread changes sync state to synchronizing and suspends threads for GC.
    //     Thread A is resumed to finish this native method, but doesn't block here since it
    //     didn't see any synchronization is progress, and escapes.
    __ mov(rscratch1, _thread_in_native_trans);
!   __ str(rscratch1, Address(rthread, JavaThread::thread_state_offset()));
  
    if(os::is_MP()) {
      if (UseMembar) {
        // Force this write out before the read below
        __ dmb(Assembler::SY);
--- 1901,1912 ----
    //     Java thread A, in _thread_in_native state, loads _not_synchronized and is preempted.
    //     VM thread changes sync state to synchronizing and suspends threads for GC.
    //     Thread A is resumed to finish this native method, but doesn't block here since it
    //     didn't see any synchronization is progress, and escapes.
    __ mov(rscratch1, _thread_in_native_trans);
!   __ lea(rscratch2, Address(rthread, JavaThread::thread_state_offset()));
!   __ stlrw(rscratch1, rscratch2);
  
    if(os::is_MP()) {
      if (UseMembar) {
        // Force this write out before the read below
        __ dmb(Assembler::SY);
*** 1964,1974 ****
      __ bind(Continue);
    }
  
    // change thread state
    __ mov(rscratch1, _thread_in_Java);
!   __ str(rscratch1, Address(rthread, JavaThread::thread_state_offset()));
    __ bind(after_transition);
  
    Label reguard;
    Label reguard_done;
    __ ldrb(rscratch1, Address(rthread, JavaThread::stack_guard_state_offset()));
--- 1966,1977 ----
      __ bind(Continue);
    }
  
    // change thread state
    __ mov(rscratch1, _thread_in_Java);
!   __ lea(rscratch2, Address(rthread, JavaThread::thread_state_offset()));
!   __ stlrw(rscratch1, rscratch2);
    __ bind(after_transition);
  
    Label reguard;
    Label reguard_done;
    __ ldrb(rscratch1, Address(rthread, JavaThread::stack_guard_state_offset()));