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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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4
hotspot/src/share/vm/classfile/verifier.cpp
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@ -67,12 +67,12 @@ static void* volatile _verify_byte_codes_fn = NULL;
static volatile jint _is_new_verify_byte_codes_fn = (jint) true;
static void* verify_byte_codes_fn() {
if (_verify_byte_codes_fn == NULL) {
if (OrderAccess::load_ptr_acquire(&_verify_byte_codes_fn) == NULL) {
void *lib_handle = os::native_java_library();
void *func = os::dll_lookup(lib_handle, "VerifyClassCodesForMajorVersion");
OrderAccess::release_store_ptr(&_verify_byte_codes_fn, func);
if (func == NULL) {
OrderAccess::release_store(&_is_new_verify_byte_codes_fn, false);
_is_new_verify_byte_codes_fn = false;
func = os::dll_lookup(lib_handle, "VerifyClassCodes");
OrderAccess::release_store_ptr(&_verify_byte_codes_fn, func);
}