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package org.graalvm.compiler.hotspot.amd64;

import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG;
import static jdk.vm.ci.code.ValueUtil.asRegister;

import org.graalvm.compiler.asm.amd64.AMD64MacroAssembler;
import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig;
import org.graalvm.compiler.lir.LIRFrameState;
import org.graalvm.compiler.lir.LIRInstructionClass;
import org.graalvm.compiler.lir.Opcode;
import org.graalvm.compiler.lir.amd64.AMD64Call;
import org.graalvm.compiler.lir.amd64.AMD64Call.IndirectCallOp;
import org.graalvm.compiler.lir.asm.CompilationResultBuilder;

import jdk.vm.ci.amd64.AMD64;
import jdk.vm.ci.code.Register;
import jdk.vm.ci.meta.ResolvedJavaMethod;
import jdk.vm.ci.meta.Value;

A register indirect call that complies with the extra conventions for such calls in HotSpot. In particular, the metaspace Method of the callee must be in RBX for the case where a vtable entry's _from_compiled_entry is the address of an C2I adapter. Such adapters expect the target method to be in RBX.
/** * A register indirect call that complies with the extra conventions for such calls in HotSpot. In * particular, the metaspace Method of the callee must be in RBX for the case where a vtable entry's * _from_compiled_entry is the address of an C2I adapter. Such adapters expect the target method to * be in RBX. */
@Opcode("CALL_INDIRECT") final class AMD64IndirectCallOp extends IndirectCallOp { public static final LIRInstructionClass<AMD64IndirectCallOp> TYPE = LIRInstructionClass.create(AMD64IndirectCallOp.class);
Vtable stubs expect the metaspace Method in RBX.
/** * Vtable stubs expect the metaspace Method in RBX. */
public static final Register METHOD = AMD64.rbx; @Use({REG}) protected Value metaspaceMethod; private final GraalHotSpotVMConfig config; AMD64IndirectCallOp(ResolvedJavaMethod targetMethod, Value result, Value[] parameters, Value[] temps, Value metaspaceMethod, Value targetAddress, LIRFrameState state, GraalHotSpotVMConfig config) { super(TYPE, targetMethod, result, parameters, temps, targetAddress, state); this.metaspaceMethod = metaspaceMethod; this.config = config; } @Override public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) { crb.recordMark(config.MARKID_INLINE_INVOKE); Register callReg = asRegister(targetAddress); assert !callReg.equals(METHOD); int pcOffset = AMD64Call.indirectCall(crb, masm, callReg, callTarget, state); crb.recordInlineInvokeCallOp(pcOffset, getPosition()); } @Override public void verify() { super.verify(); assert asRegister(metaspaceMethod).equals(METHOD); } }