changeset 55820:db740ced41c4

8228532: Shenandoah: Implement SBSA::try_resolve_jobject_in_native() Reviewed-by: rkennke
author zgu
date Tue, 23 Jul 2019 15:33:52 -0400
parents 5da01706bf11
children 99d2dd7b84a8
files src/hotspot/cpu/aarch64/gc/shenandoah/shenandoahBarrierSetAssembler_aarch64.cpp src/hotspot/cpu/aarch64/gc/shenandoah/shenandoahBarrierSetAssembler_aarch64.hpp src/hotspot/cpu/x86/gc/shenandoah/shenandoahBarrierSetAssembler_x86.cpp src/hotspot/cpu/x86/gc/shenandoah/shenandoahBarrierSetAssembler_x86.hpp
diffstat 4 files changed, 40 insertions(+), 0 deletions(-) [+]
line wrap: on
line diff
--- a/src/hotspot/cpu/aarch64/gc/shenandoah/shenandoahBarrierSetAssembler_aarch64.cpp	Wed Jul 24 12:36:12 2019 +0200
+++ b/src/hotspot/cpu/aarch64/gc/shenandoah/shenandoahBarrierSetAssembler_aarch64.cpp	Tue Jul 23 15:33:52 2019 -0400
@@ -415,6 +415,26 @@
 
 }
 
+void ShenandoahBarrierSetAssembler::try_resolve_jobject_in_native(MacroAssembler* masm, Register jni_env,
+                                                                  Register obj, Register tmp, Label& slowpath) {
+  Label done;
+  // Resolve jobject
+  BarrierSetAssembler::try_resolve_jobject_in_native(masm, jni_env, obj, tmp, slowpath);
+
+  // Check for null.
+  __ cbz(obj, done);
+
+  assert(obj != rscratch2, "need rscratch2");
+  Address gc_state(rthread, in_bytes(ShenandoahThreadLocalData::gc_state_offset()));
+  __ ldrb(rscratch2, gc_state);
+
+  // Check for heap in evacuation phase
+  __ tbnz(rscratch2, ShenandoahHeap::EVACUATION_BITPOS, slowpath);
+
+  __ bind(done);
+}
+
+
 void ShenandoahBarrierSetAssembler::cmpxchg_oop(MacroAssembler* masm, Register addr, Register expected, Register new_val,
                                                 bool acquire, bool release, bool weak, bool is_cae,
                                                 Register result) {
--- a/src/hotspot/cpu/aarch64/gc/shenandoah/shenandoahBarrierSetAssembler_aarch64.hpp	Wed Jul 24 12:36:12 2019 +0200
+++ b/src/hotspot/cpu/aarch64/gc/shenandoah/shenandoahBarrierSetAssembler_aarch64.hpp	Tue Jul 23 15:33:52 2019 -0400
@@ -81,6 +81,8 @@
                        Register dst, Address src, Register tmp1, Register tmp_thread);
   virtual void store_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
                         Address dst, Register val, Register tmp1, Register tmp2);
+  virtual void try_resolve_jobject_in_native(MacroAssembler* masm, Register jni_env,
+                                             Register obj, Register tmp, Label& slowpath);
   void cmpxchg_oop(MacroAssembler* masm, Register addr, Register expected, Register new_val,
                    bool acquire, bool release, bool weak, bool is_cae, Register result);
 
--- a/src/hotspot/cpu/x86/gc/shenandoah/shenandoahBarrierSetAssembler_x86.cpp	Wed Jul 24 12:36:12 2019 +0200
+++ b/src/hotspot/cpu/x86/gc/shenandoah/shenandoahBarrierSetAssembler_x86.cpp	Tue Jul 23 15:33:52 2019 -0400
@@ -621,6 +621,22 @@
   }
 }
 
+void ShenandoahBarrierSetAssembler::try_resolve_jobject_in_native(MacroAssembler* masm, Register jni_env,
+                                                                  Register obj, Register tmp, Label& slowpath) {
+  Label done;
+  // Resolve jobject
+  BarrierSetAssembler::try_resolve_jobject_in_native(masm, jni_env, obj, tmp, slowpath);
+
+  // Check for null.
+  __ testptr(obj, obj);
+  __ jcc(Assembler::zero, done);
+
+  Address gc_state(jni_env, ShenandoahThreadLocalData::gc_state_offset() - JavaThread::jni_environment_offset());
+  __ testb(gc_state, ShenandoahHeap::EVACUATION);
+  __ jccb(Assembler::notZero, slowpath);
+  __ bind(done);
+}
+
 // Special Shenandoah CAS implementation that handles false negatives
 // due to concurrent evacuation.
 void ShenandoahBarrierSetAssembler::cmpxchg_oop(MacroAssembler* masm,
--- a/src/hotspot/cpu/x86/gc/shenandoah/shenandoahBarrierSetAssembler_x86.hpp	Wed Jul 24 12:36:12 2019 +0200
+++ b/src/hotspot/cpu/x86/gc/shenandoah/shenandoahBarrierSetAssembler_x86.hpp	Tue Jul 23 15:33:52 2019 -0400
@@ -91,6 +91,8 @@
                        Register dst, Address src, Register tmp1, Register tmp_thread);
   virtual void store_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
                         Address dst, Register val, Register tmp1, Register tmp2);
+  virtual void try_resolve_jobject_in_native(MacroAssembler* masm, Register jni_env,
+                                             Register obj, Register tmp, Label& slowpath);
 
   virtual void barrier_stubs_init();