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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER .
*
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* under the terms of the GNU General Public License version 2 only , as
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*
* 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 ) .
*
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* 2 along with this work ; if not , write to the Free Software Foundation ,
* Inc . , 51 Franklin St , Fifth Floor , Boston , MA 02110 - 1301 USA .
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*/
import org.testng.annotations.Test;
import java.lang.foreign.Arena;
import java.lang.foreign.SegmentScope;
import java.lang.foreign.Linker;
import java.lang.foreign.FunctionDescriptor;
import java.lang.foreign.MemorySegment;
import java.lang.foreign.SymbolLookup;
import java.lang.invoke.MethodHandle;
import java.nio.file.Path;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import static org.testng.Assert .*;
/*
* @ test
* @ enablePreview
* @ requires ( ( os . arch = = " amd64 " | os . arch = = " x86_64 " ) & sun . arch . data . model = = " 64 " ) | os . arch = = " aarch64 "
* @ run testng / othervm - - enable - native - access = ALL - UNNAMED LibraryLookupTest
*/
public class LibraryLookupTest {
static final Path JAVA_LIBRARY_PATH = Path.of(System.getProperty("java.library.path" ));
static final MethodHandle INC = Linker.nativeLinker().downcallHandle(FunctionDescriptor.ofVoid());
static final Path LIB_PATH = JAVA_LIBRARY_PATH.resolve(System.mapLibraryName("LibraryLookup" ));
@Test
void testLoadLibraryConfined() {
try (Arena arena0 = Arena.openConfined()) {
callFunc(loadLibrary(arena0.scope()));
try (Arena arena1 = Arena.openConfined()) {
callFunc(loadLibrary(arena1.scope()));
try (Arena arena2 = Arena.openConfined()) {
callFunc(loadLibrary(arena2.scope()));
}
}
}
}
@Test(expectedExceptions = IllegalStateException.class )
void testLoadLibraryConfinedClosed() {
MemorySegment addr;
try (Arena arena = Arena.openConfined()) {
addr = loadLibrary(arena.scope());
}
callFunc(addr);
}
private static MemorySegment loadLibrary(SegmentScope session) {
SymbolLookup lib = SymbolLookup.libraryLookup(LIB_PATH, session);
MemorySegment addr = lib.find("inc" ).get();
assertEquals(addr.scope(), session);
return addr;
}
private static void callFunc(MemorySegment addr) {
try {
INC.invokeExact(addr);
} catch (IllegalStateException ex) {
throw ex;
} catch (Throwable ex) {
throw new AssertionError(ex);
}
}
static final int ITERATIONS = 100 ;
static final int MAX_EXECUTOR_WAIT_SECONDS = 20 ;
static final int NUM_ACCESSORS = Math.min(10 , Runtime.getRuntime().availableProcessors());
@Test(expectedExceptions = IllegalArgumentException.class )
void testBadLibraryLookupName() {
SymbolLookup.libraryLookup("nonExistent" , SegmentScope.global());
}
@Test(expectedExceptions = IllegalArgumentException.class )
void testBadLibraryLookupPath() {
SymbolLookup.libraryLookup(Path.of("nonExistent" ), SegmentScope.global());
}
@Test
void testLoadLibraryShared() throws Throwable {
ExecutorService accessExecutor = Executors.newCachedThreadPool();
for (int i = 0 ; i < NUM_ACCESSORS ; i++) {
accessExecutor.execute(new LibraryLoadAndAccess());
}
accessExecutor.shutdown();
assertTrue(accessExecutor.awaitTermination(MAX_EXECUTOR_WAIT_SECONDS, TimeUnit.SECONDS));
}
static class LibraryLoadAndAccess implements Runnable {
@Override
public void run() {
for (int i = 0 ; i < ITERATIONS ; i++) {
try (Arena arena = Arena.openConfined()) {
callFunc(loadLibrary(arena.scope()));
}
}
}
}
@Test
void testLoadLibrarySharedClosed() throws Throwable {
Arena arena = Arena.openShared();
MemorySegment addr = loadLibrary(arena.scope());
ExecutorService accessExecutor = Executors.newCachedThreadPool();
for (int i = 0 ; i < NUM_ACCESSORS ; i++) {
accessExecutor.execute(new LibraryAccess(addr));
}
while (true ) {
try {
arena.close();
break ;
} catch (IllegalStateException ex) {
// wait for addressable parameter to be released
Thread .onSpinWait();
}
}
accessExecutor.shutdown();
assertTrue(accessExecutor.awaitTermination(MAX_EXECUTOR_WAIT_SECONDS, TimeUnit.SECONDS));
}
static class LibraryAccess implements Runnable {
final MemorySegment addr;
LibraryAccess(MemorySegment addr) {
this .addr = addr;
}
@Override
public void run() {
for (int i = 0 ; i < ITERATIONS ; i++) {
try {
callFunc(addr);
} catch (IllegalStateException ex) {
// library closed
break ;
}
}
}
}
}
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