105 lines
4.2 KiB
Java
105 lines
4.2 KiB
Java
/*
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* Copyright (c) 2023, 2024, 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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/*
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* @test
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* @library ../
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* @modules java.base/jdk.internal.foreign
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* @run junit/othervm --enable-native-access=ALL-UNNAMED TestLargeStub
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*/
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import org.junit.jupiter.api.Test;
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import org.junit.jupiter.params.ParameterizedTest;
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import org.junit.jupiter.params.provider.Arguments;
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import org.junit.jupiter.params.provider.MethodSource;
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import java.lang.foreign.Arena;
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import java.lang.foreign.FunctionDescriptor;
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import java.lang.foreign.Linker;
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import java.lang.foreign.MemoryLayout;
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import java.lang.foreign.MemorySegment;
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import java.lang.foreign.ValueLayout;
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import java.lang.invoke.MethodHandles;
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import java.lang.invoke.MethodType;
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import java.util.stream.Stream;
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import static org.junit.jupiter.params.provider.Arguments.arguments;
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public class TestLargeStub extends NativeTestHelper {
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private static final int DOWNCALL_AVAILABLE_SLOTS = 248;
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private static final int UPCALL_AVAILABLE_SLOTS = 250;
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MemoryLayout STRUCT_LL = MemoryLayout.structLayout(
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C_LONG_LONG,
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C_LONG_LONG
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); // 16 byte struct triggers return buffer usage on SysV
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@ParameterizedTest
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@MethodSource("layouts")
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public void testDowncall(ValueLayout layout, int numSlots) {
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// Link a handle with a large number of arguments, to try and overflow the code buffer
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Linker.nativeLinker().downcallHandle(
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FunctionDescriptor.of(STRUCT_LL,
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Stream.generate(() -> layout).limit(DOWNCALL_AVAILABLE_SLOTS / numSlots).toArray(MemoryLayout[]::new)),
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Linker.Option.captureCallState("errno"));
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}
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@Test
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public void testDowncallAllowHeap() {
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// Link a handle with a large number of address arguments, to try and overflow the code buffer
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// Using 83 parameters should get us 255 parameter slots in total:
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// 83 oops + 166 for offsets + 2 for the target address + 2 for return buffer + MH recv. + NEP
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Linker.nativeLinker().downcallHandle(
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FunctionDescriptor.of(STRUCT_LL,
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Stream.generate(() -> C_POINTER).limit(83).toArray(MemoryLayout[]::new)),
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Linker.Option.critical(true));
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}
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@ParameterizedTest
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@MethodSource("layouts")
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public void testUpcall(ValueLayout layout, int numSlots) {
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// Link a handle with a large number of arguments, to try and overflow the code buffer
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try (Arena arena = Arena.ofConfined()) {
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Linker.nativeLinker().upcallStub(
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MethodHandles.empty(MethodType.methodType(MemorySegment.class,
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Stream.generate(() -> layout).limit(UPCALL_AVAILABLE_SLOTS / numSlots)
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.map(ValueLayout::carrier)
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.toArray(Class<?>[]::new))),
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FunctionDescriptor.of(STRUCT_LL,
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Stream.generate(() -> layout).limit(UPCALL_AVAILABLE_SLOTS / numSlots)
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.toArray(MemoryLayout[]::new)),
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arena);
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}
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}
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private static Stream<Arguments> layouts() {
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return Stream.of(
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arguments(C_INT, 1),
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arguments(C_LONG_LONG, 2),
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arguments(C_FLOAT, 1),
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arguments(C_DOUBLE, 2)
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);
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}
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}
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