From 7c73365615f00951272310db44dec2939b91b48e Mon Sep 17 00:00:00 2001
Date: Wed, 19 Feb 2020 19:09:39 +0000
Subject: [PATCH] fix incorrect offset for oop field with weak memory model

Summary: <interpreter>: add loadload membar in fast_storefield and fast_accessfield to avoid loading a incorrect offset
LLT: N/A
Bug url: N/A
---
 hotspot/src/cpu/aarch64/vm/templateTable_aarch64.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/hotspot/src/cpu/aarch64/vm/templateTable_aarch64.cpp b/hotspot/src/cpu/aarch64/vm/templateTable_aarch64.cpp
index 5a619566..aa9545ee 100644
--- a/hotspot/src/cpu/aarch64/vm/templateTable_aarch64.cpp
+++ b/hotspot/src/cpu/aarch64/vm/templateTable_aarch64.cpp
@@ -2922,6 +2922,8 @@ void TemplateTable::fast_storefield(TosState state)
   // access constant pool cache
   __ get_cache_and_index_at_bcp(r2, r1, 1);
 
+  __ membar(MacroAssembler::LoadLoad);
+
   // test for volatile with r3
   __ ldrw(r3, Address(r2, in_bytes(base +
 				   ConstantPoolCacheEntry::flags_offset())));
@@ -3013,6 +3015,9 @@ void TemplateTable::fast_accessfield(TosState state)
 
   // access constant pool cache
   __ get_cache_and_index_at_bcp(r2, r1, 1);
+   
+  __ membar(MacroAssembler::LoadLoad);
+
   __ ldr(r1, Address(r2, in_bytes(ConstantPoolCache::base_offset() +
                                   ConstantPoolCacheEntry::f2_offset())));
   __ ldrw(r3, Address(r2, in_bytes(ConstantPoolCache::base_offset() +
-- 
2.19.0