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8158854: Ensure release_store is paired with load_acquire in lock-free code

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Reviewed-by: shade, dcubed, zgu
This commit is contained in:
David Holmes 2016-08-29 20:13:45 -04:00
parent 56ff858c45
commit 6db26ca5bf
10 changed files with 87 additions and 23 deletions
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17
hotspot/src/share/vm/oops/instanceKlass.inline.hpp
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@ -29,10 +29,27 @@
#include "oops/instanceKlass.hpp"
#include "oops/klass.hpp"
#include "oops/oop.inline.hpp"
#include "runtime/orderAccess.inline.hpp"
#include "utilities/debug.hpp"
#include "utilities/globalDefinitions.hpp"
#include "utilities/macros.hpp"
inline Klass* InstanceKlass::array_klasses_acquire() const {
return (Klass*) OrderAccess::load_ptr_acquire(&_array_klasses);
}
inline void InstanceKlass::release_set_array_klasses(Klass* k) {
OrderAccess::release_store_ptr(&_array_klasses, k);
}
inline jmethodID* InstanceKlass::methods_jmethod_ids_acquire() const {
return (jmethodID*)OrderAccess::load_ptr_acquire(&_methods_jmethod_ids);
}
inline void InstanceKlass::release_set_methods_jmethod_ids(jmethodID* jmeths) {
OrderAccess::release_store_ptr(&_methods_jmethod_ids, jmeths);
}
// The iteration over the oops in objects is a hot path in the GC code.
// By force inlining the following functions, we get similar GC performance
// as the previous macro based implementation.