src/cpu/x86/vm/macroAssembler_x86.cpp

rev 14282 : Factor out keep-alive barrier from usual pre-barrier implementations.

*** 5589,5598 ****
--- 5589,5614 ----
    pop(store_addr);
  
    bind(done);
  }
  
+ void MacroAssembler::keep_alive_barrier(Register val,
+                                         Register thread,
+                                         Register tmp) {
+ 
+   if (UseG1GC || (UseShenandoahGC && ShenandoahKeepAliveBarrier)) {
+     // Generate the G1 pre-barrier code to log the value of
+     // the referent field in an SATB buffer.
+     g1_write_barrier_pre(noreg, 
+                          rax /* pre_val */,
+                          thread /* thread */,
+                          tmp,
+                          true /* tosca_live */,
+                          true /* expand_call */);
+   }
+ }
+ 
  #ifndef _LP64
  void MacroAssembler::shenandoah_write_barrier(Register dst) {
    Unimplemented();
  }
  #else