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comparison src/cpu/x86/vm/c1_LIRGenerator_x86.cpp @ 13022:946a8294ab15

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8024919: G1: SPECjbb2013 crashes due to a broken object reference Summary: Pass correct new value to post_barrer() in Unsafe.getAndSetObject() C1 intrinsic Reviewed-by: kvn, roland
author iveresov
date Thu, 31 Oct 2013 04:16:40 -0700
parents 7944aba7ba41
children 4d7678fb8a27
comparison
equal deleted inserted replaced
13021:4d3575d37a07 13022:946a8294ab15
1466 #endif 1466 #endif
1467 } else { 1467 } else {
1468 addr = new LIR_Address(src.result(), offset, type); 1468 addr = new LIR_Address(src.result(), offset, type);
1469 } 1469 }
1470 1470
1471 if (data != dst) { 1471 // Because we want a 2-arg form of xchg and xadd
1472 __ move(data, dst); 1472 __ move(data, dst);
1473 data = dst; 1473
1474 }
1475 if (x->is_add()) { 1474 if (x->is_add()) {
1476 __ xadd(LIR_OprFact::address(addr), data, dst, LIR_OprFact::illegalOpr); 1475 __ xadd(LIR_OprFact::address(addr), dst, dst, LIR_OprFact::illegalOpr);
1477 } else { 1476 } else {
1478 if (is_obj) { 1477 if (is_obj) {
1479 // Do the pre-write barrier, if any. 1478 // Do the pre-write barrier, if any.
1480 pre_barrier(LIR_OprFact::address(addr), LIR_OprFact::illegalOpr /* pre_val */, 1479 pre_barrier(LIR_OprFact::address(addr), LIR_OprFact::illegalOpr /* pre_val */,
1481 true /* do_load */, false /* patch */, NULL); 1480 true /* do_load */, false /* patch */, NULL);
1482 } 1481 }
1483 __ xchg(LIR_OprFact::address(addr), data, dst, LIR_OprFact::illegalOpr); 1482 __ xchg(LIR_OprFact::address(addr), dst, dst, LIR_OprFact::illegalOpr);
1484 if (is_obj) { 1483 if (is_obj) {
1485 // Seems to be a precise address 1484 // Seems to be a precise address
1486 post_barrier(LIR_OprFact::address(addr), data); 1485 post_barrier(LIR_OprFact::address(addr), data);
1487 } 1486 }
1488 } 1487 }