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/*
* Copyright (c) 2022, 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 TestCaptureCallState
*/
import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;
import java.lang.foreign.Arena;
import java.lang.foreign.FunctionDescriptor;
import java.lang.foreign.Linker;
import java.lang.foreign.MemoryLayout;
import java.lang.foreign.MemorySegment;
import java.lang.foreign.StructLayout;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.VarHandle;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.function.Consumer;
import static java.lang.foreign.MemoryLayout.PathElement.groupElement;
import static java.lang.foreign.ValueLayout.JAVA_DOUBLE;
import static java.lang.foreign.ValueLayout.JAVA_INT;
import static java.lang.foreign.ValueLayout.JAVA_LONG;
import static org.testng.Assert.assertEquals;
import static org.testng.Assert.assertTrue;
public class TestCaptureCallState extends NativeTestHelper {
static {
System.loadLibrary("CaptureCallState");
if (IS_WINDOWS) {
String system32 = System.getenv("SystemRoot") + "\\system32";
System.load(system32 + "\\Kernel32.dll");
System.load(system32 + "\\Ws2_32.dll");
}
}
private record SaveValuesCase(String nativeTarget, FunctionDescriptor nativeDesc, boolean trivial, String threadLocalName, Consumer<Object> resultCheck) {}
@Test(dataProvider = "cases")
public void testSavedThreadLocal(SaveValuesCase testCase) throws Throwable {
List<Linker.Option> options = new ArrayList<>();
options.add(Linker.Option.captureCallState(testCase.threadLocalName()));
if (testCase.trivial()) {
options.add(Linker.Option.isTrivial());
}
MethodHandle handle = downcallHandle(testCase.nativeTarget(), testCase.nativeDesc(), options.toArray(Linker.Option[]::new));
StructLayout capturedStateLayout = Linker.Option.captureStateLayout();
VarHandle errnoHandle = capturedStateLayout.varHandle(groupElement(testCase.threadLocalName()));
try (Arena arena = Arena.ofConfined()) {
MemorySegment saveSeg = arena.allocate(capturedStateLayout);
int testValue = 42;
boolean needsAllocator = testCase.nativeDesc().returnLayout().map(StructLayout.class::isInstance).orElse(false);
Object result = needsAllocator
? handle.invoke(arena, saveSeg, testValue)
: handle.invoke(saveSeg, testValue);
testCase.resultCheck().accept(result);
int savedErrno = (int) errnoHandle.get(saveSeg);
assertEquals(savedErrno, testValue);
}
}
@Test(dataProvider = "invalidCaptureSegmentCases")
public void testInvalidCaptureSegment(MemorySegment captureSegment,
Class<?> expectedExceptionType, String expectedExceptionMessage) {
Linker.Option stl = Linker.Option.captureCallState("errno");
MethodHandle handle = downcallHandle("set_errno_V", FunctionDescriptor.ofVoid(C_INT), stl);
try {
int testValue = 42;
handle.invoke(captureSegment, testValue); // should throw
} catch (Throwable t) {
assertTrue(expectedExceptionType.isInstance(t));
assertTrue(t.getMessage().matches(expectedExceptionMessage));
}
}
interface CaseAdder {
void addCase(String nativeTarget, FunctionDescriptor nativeDesc, String threadLocalName, Consumer<Object> resultCheck);
}
@DataProvider
public static Object[][] cases() {
List<SaveValuesCase> cases = new ArrayList<>();
CaseAdder adder = (nativeTarget, nativeDesc, threadLocalName, resultCheck) -> {
cases.add(new SaveValuesCase(nativeTarget, nativeDesc, false, threadLocalName, resultCheck));
cases.add(new SaveValuesCase(nativeTarget, nativeDesc, true, threadLocalName, resultCheck));
};
adder.addCase("set_errno_V", FunctionDescriptor.ofVoid(JAVA_INT), "errno", o -> {});
adder.addCase("set_errno_I", FunctionDescriptor.of(JAVA_INT, JAVA_INT), "errno", o -> assertEquals((int) o, 42));
adder.addCase("set_errno_D", FunctionDescriptor.of(JAVA_DOUBLE, JAVA_INT), "errno", o -> assertEquals((double) o, 42.0));
structCase(adder, "SL", Map.of(JAVA_LONG.withName("x"), 42L));
structCase(adder, "SLL", Map.of(JAVA_LONG.withName("x"), 42L,
JAVA_LONG.withName("y"), 42L));
structCase(adder, "SLLL", Map.of(JAVA_LONG.withName("x"), 42L,
JAVA_LONG.withName("y"), 42L,
JAVA_LONG.withName("z"), 42L));
structCase(adder, "SD", Map.of(JAVA_DOUBLE.withName("x"), 42D));
structCase(adder, "SDD", Map.of(JAVA_DOUBLE.withName("x"), 42D,
JAVA_DOUBLE.withName("y"), 42D));
structCase(adder, "SDDD", Map.of(JAVA_DOUBLE.withName("x"), 42D,
JAVA_DOUBLE.withName("y"), 42D,
JAVA_DOUBLE.withName("z"), 42D));
if (IS_WINDOWS) {
adder.addCase("SetLastError", FunctionDescriptor.ofVoid(JAVA_INT), "GetLastError", o -> {});
adder.addCase("WSASetLastError", FunctionDescriptor.ofVoid(JAVA_INT), "WSAGetLastError", o -> {});
}
return cases.stream().map(tc -> new Object[] {tc}).toArray(Object[][]::new);
}
static void structCase(CaseAdder adder, String name, Map<MemoryLayout, Object> fields) {
StructLayout layout = MemoryLayout.structLayout(fields.keySet().toArray(MemoryLayout[]::new));
Consumer<Object> check = o -> {};
for (var field : fields.entrySet()) {
MemoryLayout fieldLayout = field.getKey();
VarHandle fieldHandle = layout.varHandle(MemoryLayout.PathElement.groupElement(fieldLayout.name().get()));
Object value = field.getValue();
check = check.andThen(o -> assertEquals(fieldHandle.get(o), value));
}
adder.addCase("set_errno_" + name, FunctionDescriptor.of(layout, JAVA_INT), "errno", check);
}
@DataProvider
public static Object[][] invalidCaptureSegmentCases() {
return new Object[][]{
{Arena.ofAuto().allocate(1), IndexOutOfBoundsException.class, ".*Out of bound access on segment.*"},
{MemorySegment.NULL, IllegalArgumentException.class, ".*Capture segment is NULL.*"},
{Arena.ofAuto().allocate(Linker.Option.captureStateLayout().byteSize() + 3).asSlice(3), // misaligned
IllegalArgumentException.class, ".*Target offset incompatible with alignment constraints.*"},
};
}
}
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