1 /*
2 * Copyright (c) 2021, 2023, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 /*
25 * @test id=default_gc
26 * @enablePreview
27 * @bug 8277602
28 * @requires jdk.foreign.linker != "UNSUPPORTED"
29 * @library /test/lib
30 * @library ../
31 * @build jdk.test.whitebox.WhiteBox
32 * @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
33 *
34 * @run main/othervm
35 * -Xbootclasspath/a:.
36 * -XX:+UnlockDiagnosticVMOptions
37 * -XX:+WhiteBoxAPI
38 * --enable-native-access=ALL-UNNAMED
39 * -Xbatch
40 * TestUpcallDeopt
41 */
42
43 import java.lang.foreign.Arena;
44 import java.lang.foreign.Linker;
45 import java.lang.foreign.FunctionDescriptor;
46 import java.lang.foreign.MemorySegment;
47
48 import java.lang.invoke.MethodHandle;
49 import java.lang.invoke.MethodType;
50 import java.lang.ref.Reference;
51
52 import jdk.test.whitebox.WhiteBox;
53
54 import static java.lang.invoke.MethodHandles.lookup;
55
56 public class TestUpcallDeopt extends NativeTestHelper {
57 static final WhiteBox WB = WhiteBox.getWhiteBox();
58
59 static final Linker linker = Linker.nativeLinker();
60
61 static final MethodHandle MH_foo;
62 static final MethodHandle MH_m;
63
64 static {
65 try {
66 System.loadLibrary("UpcallDeopt");
67 MH_foo = linker.downcallHandle(
68 findNativeOrThrow("foo"),
69 FunctionDescriptor.ofVoid(C_POINTER, C_INT, C_INT, C_INT, C_INT));
70 MH_m = lookup().findStatic(TestUpcallDeopt.class, "m",
71 MethodType.methodType(void.class, int.class, int.class, int.class, int.class));
72 } catch (ReflectiveOperationException e) {
73 throw new RuntimeException(e);
74 }
75 }
76
77 static boolean armed;
78
79 // we need to deoptimize through an uncommon trap in the callee of the optimized upcall stub
80 // that is created when calling upcallStub below
81 public static void main(String[] args) throws Throwable {
82 try (Arena arena = Arena.ofConfined()) {
83 MemorySegment stub = linker.upcallStub(MH_m, FunctionDescriptor.ofVoid(C_INT, C_INT, C_INT, C_INT), arena);
84 armed = false;
85 for (int i = 0; i < 20_000; i++) {
86 payload(stub); // warmup
87 }
88
89 armed = true;
90 payload(stub); // test
91 }
92 }
93
94 static void payload(MemorySegment cb) throws Throwable {
95 MH_foo.invokeExact(cb, 0, 1, 2, 3);
96 Reference.reachabilityFence(cb); // keep oop alive across call
97 }
98
99 // Takes a bunch of arguments, even though unused, to test
100 // if the caller's frame is extended enough to spill these arguments.
101 static void m(int a0, int a1, int a2, int a3) {
102 if (armed) {
103 // Trigger uncommon trap from this frame
104 WB.verifyFrames(/*log=*/true, /*updateRegisterMap=*/true);
105 WB.verifyFrames(/*log=*/true, /*updateRegisterMap=*/false); // triggers different code paths
106 }
107 }
108
109 }