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/*
* Copyright (c) 2023, 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.
*/
/*
* @test
* @enablePreview
* @library ../ /test/lib
* @requires jdk.foreign.linker != "UNSUPPORTED"
* @run testng/othervm --enable-native-access=ALL-UNNAMED TestAddressDereference
*/
import java.lang.foreign.Arena;
import java.lang.foreign.FunctionDescriptor;
import java.lang.foreign.Linker;
import java.lang.foreign.MemorySegment;
import java.lang.foreign.SymbolLookup;
import java.lang.foreign.ValueLayout;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;
import java.util.ArrayList;
import java.util.List;
import org.testng.annotations.*;
import static org.testng.Assert.*;
public class TestAddressDereference extends UpcallTestHelper {
static final Linker LINKER = Linker.nativeLinker();
static final MemorySegment GET_ADDR_SYM;
static final MethodHandle GET_ADDR_CB_HANDLE, TEST_ARG_HANDLE;
static {
System.loadLibrary("AddressDereference");
GET_ADDR_SYM = SymbolLookup.loaderLookup().find("get_addr").get();
GET_ADDR_CB_HANDLE = LINKER.downcallHandle(
SymbolLookup.loaderLookup().find("get_addr_cb").get(),
FunctionDescriptor.ofVoid(ValueLayout.ADDRESS, ValueLayout.ADDRESS));
try {
TEST_ARG_HANDLE = MethodHandles.lookup().findStatic(TestAddressDereference.class, "testArg",
MethodType.methodType(void.class, MemorySegment.class, long.class));
} catch (Throwable ex) {
throw new AssertionError(ex);
}
}
@Test(dataProvider = "layoutsAndAlignments")
public void testGetAddress(long alignment, ValueLayout layout) {
boolean badAlign = layout.byteAlignment() > alignment;
try (Arena arena = Arena.ofConfined()) {
MemorySegment segment = arena.allocate(ValueLayout.ADDRESS);
segment.set(ValueLayout.ADDRESS, 0, MemorySegment.ofAddress(alignment));
MemorySegment deref = segment.get(ValueLayout.ADDRESS.withTargetLayout(layout), 0);
assertFalse(badAlign);
assertEquals(deref.byteSize(), layout.byteSize());
} catch (IllegalArgumentException ex) {
assertTrue(badAlign);
assertTrue(ex.getMessage().contains("alignment constraint for address"));
}
}
@Test(dataProvider = "layoutsAndAlignments")
public void testGetAddressIndex(long alignment, ValueLayout layout) {
boolean badAlign = layout.byteAlignment() > alignment;
try (Arena arena = Arena.ofConfined()) {
MemorySegment segment = arena.allocate(ValueLayout.ADDRESS);
segment.set(ValueLayout.ADDRESS, 0, MemorySegment.ofAddress(alignment));
MemorySegment deref = segment.getAtIndex(ValueLayout.ADDRESS.withTargetLayout(layout), 0);
assertFalse(badAlign);
assertEquals(deref.byteSize(), layout.byteSize());
} catch (IllegalArgumentException ex) {
assertTrue(badAlign);
assertTrue(ex.getMessage().contains("alignment constraint for address"));
}
}
@Test(dataProvider = "layoutsAndAlignments")
public void testNativeReturn(long alignment, ValueLayout layout) throws Throwable {
boolean badAlign = layout.byteAlignment() > alignment;
try {
MethodHandle get_addr_handle = LINKER.downcallHandle(GET_ADDR_SYM,
FunctionDescriptor.of(ValueLayout.ADDRESS.withTargetLayout(layout), ValueLayout.ADDRESS));
MemorySegment deref = (MemorySegment)get_addr_handle.invokeExact(MemorySegment.ofAddress(alignment));
assertFalse(badAlign);
assertEquals(deref.byteSize(), layout.byteSize());
} catch (IllegalArgumentException ex) {
assertTrue(badAlign);
assertTrue(ex.getMessage().contains("alignment constraint for address"));
}
}
@Test(dataProvider = "layoutsAndAlignments")
public void testNativeUpcallArgPos(long alignment, ValueLayout layout) throws Throwable {
boolean badAlign = layout.byteAlignment() > alignment;
if (badAlign) return; // this will crash the JVM (exception occurs when going into the upcall stub)
try (Arena arena = Arena.ofConfined()) {
FunctionDescriptor testDesc = FunctionDescriptor.ofVoid(ValueLayout.ADDRESS.withTargetLayout(layout));
MethodHandle upcallHandle = MethodHandles.insertArguments(TEST_ARG_HANDLE, 1, layout.byteSize());
MemorySegment testStub = LINKER.upcallStub(upcallHandle, testDesc, arena);
GET_ADDR_CB_HANDLE.invokeExact(MemorySegment.ofAddress(alignment), testStub);
}
}
@Test(dataProvider = "layoutsAndAlignments")
public void testNativeUpcallArgNeg(long alignment, ValueLayout layout) throws Throwable {
boolean badAlign = layout.byteAlignment() > alignment;
if (!badAlign) return;
runInNewProcess(UpcallTestRunner.class, true,
new String[] {Long.toString(alignment), layout.toString() })
.assertStdErrContains("alignment constraint for address");
}
public static class UpcallTestRunner {
public static void main(String[] args) throws Throwable {
long alignment = parseAlignment(args[0]);
ValueLayout layout = parseLayout(args[1]);
try (Arena arena = Arena.ofConfined()) {
FunctionDescriptor testDesc = FunctionDescriptor.ofVoid(ValueLayout.ADDRESS.withTargetLayout(layout));
MethodHandle upcallHandle = MethodHandles.insertArguments(TEST_ARG_HANDLE, 1, layout.byteSize());
MemorySegment testStub = LINKER.upcallStub(upcallHandle, testDesc, arena);
GET_ADDR_CB_HANDLE.invokeExact(MemorySegment.ofAddress(alignment), testStub);
}
}
static long parseAlignment(String s) {
return Long.parseLong(s);
}
static ValueLayout parseLayout(String s) {
return LayoutKind.parse(s).layout;
}
}
static void testArg(MemorySegment deref, long expectedSize) {
assertEquals(deref.byteSize(), expectedSize);
}
@DataProvider(name = "layoutsAndAlignments")
static Object[][] layoutsAndAlignments() {
List<Object[]> layoutsAndAlignments = new ArrayList<>();
for (LayoutKind lk : LayoutKind.values()) {
for (int align : new int[]{ 1, 2, 4, 8 }) {
layoutsAndAlignments.add(new Object[] { align, lk.layout });
}
}
return layoutsAndAlignments.toArray(Object[][]::new);
}
enum LayoutKind {
BOOL(ValueLayout.JAVA_BOOLEAN),
CHAR(ValueLayout.JAVA_CHAR),
SHORT(ValueLayout.JAVA_SHORT),
INT(ValueLayout.JAVA_INT),
FLOAT(ValueLayout.JAVA_FLOAT),
LONG(ValueLayout.JAVA_LONG),
DOUBLE(ValueLayout.JAVA_DOUBLE),
ADDRESS(ValueLayout.ADDRESS);
final ValueLayout layout;
LayoutKind(ValueLayout segment) {
this.layout = segment;
}
static LayoutKind parse(String layoutString) {
return switch (layoutString.charAt(0)) {
case 'A','a' -> ADDRESS;
case 'z','Z' -> BOOL;
case 'c','C' -> CHAR;
case 's','S' -> SHORT;
case 'i','I' -> INT;
case 'f','F' -> FLOAT;
case 'j','J' -> LONG;
case 'd','D' -> DOUBLE;
default -> throw new AssertionError("Invalid layout string: " + layoutString);
};
}
}
}
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