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8239477: jdk/jfr/jcmd/ fails -XX:+Verify…
…Oops with "verify_oop: rsi: broken oop"

Use T_ADDRESS instead of T_OBJECT to load metadata.

Reviewed-by: kvn
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TobiHartmann committed Jun 2, 2020
1 parent f822eed commit b5775c831d27544870b6155cadc7d9861b93c438
Showing with 7 additions and 5 deletions.
  1. +7 −5 src/hotspot/share/c1/c1_LIRGenerator.cpp
@@ -2975,16 +2975,18 @@ void LIRGenerator::do_ClassIDIntrinsic(Intrinsic* x) {
void LIRGenerator::do_getEventWriter(Intrinsic* x) {
LabelObj* L_end = new LabelObj();

// FIXME T_ADDRESS should actually be T_METADATA but it can't because the
// meaning of these two is mixed up (see JDK-8026837).
LIR_Address* jobj_addr = new LIR_Address(getThreadPointer(),
LIR_Opr result = rlock_result(x);
__ move_wide(jobj_addr, result);
__ cmp(lir_cond_equal, result, LIR_OprFact::oopConst(NULL));
__ move(LIR_OprFact::oopConst(NULL), result);
LIR_Opr jobj = new_register(T_METADATA);
__ move_wide(jobj_addr, jobj);
__ cmp(lir_cond_equal, jobj, LIR_OprFact::metadataConst(0));
__ branch(lir_cond_equal, L_end->label());

LIR_Opr jobj = new_register(T_OBJECT);
__ move(result, jobj);
access_load(IN_NATIVE, T_OBJECT, LIR_OprFact::address(new LIR_Address(jobj, T_OBJECT)), result);

__ branch_destination(L_end->label());

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