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8163589: Add back class id intrinsic method for event based tracing

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Reviewed-by: kvn, mgronlun
This commit is contained in:
Robbin Ehn 2016-09-01 08:30:17 +02:00
parent ddfcdd9299
commit d67d71f44c
6 changed files with 84 additions and 0 deletions
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34
hotspot/src/share/vm/c1/c1_LIRGenerator.cpp
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@ -3083,6 +3083,37 @@ void LIRGenerator::do_IfOp(IfOp* x) {
__ cmove(lir_cond(x->cond()), t_val.result(), f_val.result(), reg, as_BasicType(x->x()->type()));
}
#ifdef TRACE_HAVE_INTRINSICS
void LIRGenerator::do_ClassIDIntrinsic(Intrinsic* x) {
CodeEmitInfo* info = state_for(x);
CodeEmitInfo* info2 = new CodeEmitInfo(info); // Clone for the second null check
assert(info != NULL, "must have info");
LIRItem arg(x->argument_at(0), this);
arg.load_item();
LIR_Opr klass = new_register(T_METADATA);
__ move(new LIR_Address(arg.result(), java_lang_Class::klass_offset_in_bytes(), T_ADDRESS), klass, info);
LIR_Opr id = new_register(T_LONG);
ByteSize offset = TRACE_KLASS_TRACE_ID_OFFSET;
LIR_Address* trace_id_addr = new LIR_Address(klass, in_bytes(offset), T_LONG);
__ move(trace_id_addr, id);
__ logical_or(id, LIR_OprFact::longConst(0x01l), id);
__ store(id, trace_id_addr);
#ifdef TRACE_ID_META_BITS
__ logical_and(id, LIR_OprFact::longConst(~TRACE_ID_META_BITS), id);
#endif
#ifdef TRACE_ID_CLASS_SHIFT
__ unsigned_shift_right(id, TRACE_ID_CLASS_SHIFT, id);
#endif
__ move(id, rlock_result(x));
}
#endif
void LIRGenerator::do_RuntimeCall(address routine, Intrinsic* x) {
assert(x->number_of_arguments() == 0, "wrong type");
// Enforce computation of _reserved_argument_area_size which is required on some platforms.
@ -3108,6 +3139,9 @@ void LIRGenerator::do_Intrinsic(Intrinsic* x) {
}
#ifdef TRACE_HAVE_INTRINSICS
case vmIntrinsics::_getClassId:
do_ClassIDIntrinsic(x);
break;
case vmIntrinsics::_counterTime:
do_RuntimeCall(CAST_FROM_FN_PTR(address, TRACE_TIME_METHOD), x);
break;