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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * version 2 for more details (a copy is included in the LICENSE file that
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package org.graalvm.compiler.hotspot.amd64;

import static jdk.vm.ci.amd64.AMD64.rbp;
import static jdk.vm.ci.amd64.AMD64.rsp;
import static jdk.vm.ci.code.ValueUtil.asRegister;
import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG;

import org.graalvm.compiler.asm.amd64.AMD64Address;
import org.graalvm.compiler.asm.amd64.AMD64Assembler.ConditionFlag;
import org.graalvm.compiler.asm.amd64.AMD64MacroAssembler;
import org.graalvm.compiler.lir.LIRInstructionClass;
import org.graalvm.compiler.lir.Opcode;
import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
import org.graalvm.compiler.serviceprovider.JavaVersionUtil;

import jdk.vm.ci.code.Register;
import jdk.vm.ci.meta.AllocatableValue;

Sets up the arguments for an exception handler in the callers frame, removes the current frame and jumps to the handler.
/** * Sets up the arguments for an exception handler in the callers frame, removes the current frame * and jumps to the handler. */
@Opcode("JUMP_TO_EXCEPTION_HANDLER_IN_CALLER") final class AMD64HotSpotJumpToExceptionHandlerInCallerOp extends AMD64HotSpotEpilogueBlockEndOp { public static final LIRInstructionClass<AMD64HotSpotJumpToExceptionHandlerInCallerOp> TYPE = LIRInstructionClass.create(AMD64HotSpotJumpToExceptionHandlerInCallerOp.class); @Use(REG) AllocatableValue handlerInCallerPc; @Use(REG) AllocatableValue exception; @Use(REG) AllocatableValue exceptionPc; private final Register thread; private final int isMethodHandleReturnOffset; AMD64HotSpotJumpToExceptionHandlerInCallerOp(AllocatableValue handlerInCallerPc, AllocatableValue exception, AllocatableValue exceptionPc, int isMethodHandleReturnOffset, Register thread) { super(TYPE); this.handlerInCallerPc = handlerInCallerPc; this.exception = exception; this.exceptionPc = exceptionPc; this.isMethodHandleReturnOffset = isMethodHandleReturnOffset; this.thread = thread; } @Override public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) { leaveFrameAndRestoreRbp(crb, masm); // Discard the return address, thus completing restoration of caller frame masm.incrementq(rsp, 8); if (JavaVersionUtil.JAVA_SPEC < 8) { // Restore rsp from rbp if the exception PC is a method handle call site. AMD64Address dst = new AMD64Address(thread, isMethodHandleReturnOffset); masm.cmpl(dst, 0); masm.cmovq(ConditionFlag.NotEqual, rsp, rbp); } masm.jmp(asRegister(handlerInCallerPc)); } }