--- /dev/null 2016-05-31 09:42:47.975716356 -0700 +++ new/src/jdk.vm.compiler/share/classes/org.graalvm.compiler.hotspot.amd64/src/org/graalvm/compiler/hotspot/amd64/AMD64HotSpotJumpToExceptionHandlerInCallerOp.java 2016-12-07 13:49:34.820680527 -0800 @@ -0,0 +1,80 @@ +/* + * Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ +package org.graalvm.compiler.hotspot.amd64; + +import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG; +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 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 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. + */ +@Opcode("JUMP_TO_EXCEPTION_HANDLER_IN_CALLER") +final class AMD64HotSpotJumpToExceptionHandlerInCallerOp extends AMD64HotSpotEpilogueBlockEndOp { + + public static final LIRInstructionClass 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 (System.getProperty("java.specification.version").compareTo("1.8") < 0) { + // 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)); + } +}