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