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7121140: Allocation paths require explicit memory synchronization operations for RMO systems

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Adds store store barrier after initialization of header and body of objects.

Reviewed-by: never, kvn
This commit is contained in:
Roland Westrelin 2011-12-20 16:56:50 +01:00
parent e057d60ca1
commit 97439fb4ff
13 changed files with 196 additions and 7 deletions
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13
hotspot/src/share/vm/opto/graphKit.cpp
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@ -3337,6 +3337,19 @@ InitializeNode* AllocateNode::initialization() {
return NULL;
}
// Trace Allocate -> Proj[Parm] -> MemBarStoreStore
MemBarStoreStoreNode* AllocateNode::storestore() {
ProjNode* rawoop = proj_out(AllocateNode::RawAddress);
if (rawoop == NULL) return NULL;
for (DUIterator_Fast imax, i = rawoop->fast_outs(imax); i < imax; i++) {
Node* storestore = rawoop->fast_out(i);
if (storestore->is_MemBarStoreStore()) {
return storestore->as_MemBarStoreStore();
}
}
return NULL;
}
//----------------------------- loop predicates ---------------------------
//------------------------------add_predicate_impl----------------------------