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/*
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* Copyright (c) 2009, 2019, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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50858
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package org.graalvm.compiler.core.common.spi;
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import jdk.vm.ci.code.CallingConvention;
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import jdk.vm.ci.meta.InvokeTarget;
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import jdk.vm.ci.meta.Value;
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/**
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* The runtime specific details of a {@linkplain ForeignCallDescriptor foreign} call.
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*/
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public interface ForeignCallLinkage extends InvokeTarget {
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/**
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* Gets the details of where parameters are passed and value(s) are returned from the caller's
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* perspective.
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*/
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CallingConvention getOutgoingCallingConvention();
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/**
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* Gets the details of where parameters are passed and value(s) are returned from the callee's
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* perspective.
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*/
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CallingConvention getIncomingCallingConvention();
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/**
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* Returns the maximum absolute offset of a PC relative call to this stub from any position in
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* the code cache or -1 when not applicable. Intended for determining the required size of
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* address/offset fields.
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*/
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long getMaxCallTargetOffset();
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ForeignCallDescriptor getDescriptor();
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/**
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* Gets the values used/killed by this foreign call.
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*/
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Value[] getTemporaries();
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/**
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* Determines if the foreign call target destroys all registers.
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*
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* @return {@code true} if the register allocator must save all live registers around a call to
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* this target
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*/
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boolean destroysRegisters();
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/**
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* Determines if debug info needs to be associated with this call. Debug info is required if the
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* function can raise an exception, try to lock, trigger GC or do anything else that requires
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* the VM to be able to inspect the thread's execution state.
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*/
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boolean needsDebugInfo();
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/**
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* Returns true if further cleanup on the float registers is needed after performing the foreign
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* call. This is critical on AMD64 as there is a performance penalty switching between legacy
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* SSE and AVX instruction while the upper halves of the xmm registers are not zero.
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*/
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default boolean needsClearUpperVectorRegisters() {
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return false;
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}
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}
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