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 * @bug 8277602
27 * @library /test/lib
28 * @library ../
29 * @build jdk.test.whitebox.WhiteBox
30 * @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
31 *
32 * @run main/othervm
33 * -Xbootclasspath/a:.
34 * -XX:+UnlockDiagnosticVMOptions
35 * -XX:+WhiteBoxAPI
36 * --enable-native-access=ALL-UNNAMED
37 * -Xbatch
38 * TestUpcallDeopt
39 */
40
41 import java.lang.foreign.Arena;
42 import java.lang.foreign.Linker;
43 import java.lang.foreign.FunctionDescriptor;
44 import java.lang.foreign.MemorySegment;
45
46 import java.lang.invoke.MethodHandle;
47 import java.lang.invoke.MethodType;
48 import java.lang.ref.Reference;
49
50 import jdk.test.whitebox.WhiteBox;
51
52 import static java.lang.invoke.MethodHandles.lookup;
53
54 public class TestUpcallDeopt extends NativeTestHelper {
55 static final WhiteBox WB = WhiteBox.getWhiteBox();
56
57 static final Linker linker = Linker.nativeLinker();
58
59 static final MethodHandle MH_foo;
60 static final MethodHandle MH_m;
61
62 static {
63 try {
64 System.loadLibrary("UpcallDeopt");
65 MH_foo = linker.downcallHandle(
66 findNativeOrThrow("foo"),
67 FunctionDescriptor.ofVoid(C_POINTER, C_INT, C_INT, C_INT, C_INT));
68 MH_m = lookup().findStatic(TestUpcallDeopt.class, "m",
69 MethodType.methodType(void.class, int.class, int.class, int.class, int.class));
70 } catch (ReflectiveOperationException e) {
71 throw new RuntimeException(e);
72 }
73 }
74
75 static boolean armed;
76
77 // we need to deoptimize through an uncommon trap in the callee of the optimized upcall stub
78 // that is created when calling upcallStub below
79 public static void main(String[] args) throws Throwable {
80 try (Arena arena = Arena.ofConfined()) {
81 MemorySegment stub = linker.upcallStub(MH_m, FunctionDescriptor.ofVoid(C_INT, C_INT, C_INT, C_INT), arena);
82 armed = false;
83 for (int i = 0; i < 20_000; i++) {
84 payload(stub); // warmup
85 }
86
87 armed = true;
88 payload(stub); // test
89 }
90 }
91
92 static void payload(MemorySegment cb) throws Throwable {
93 MH_foo.invokeExact(cb, 0, 1, 2, 3);
94 Reference.reachabilityFence(cb); // keep oop alive across call
95 }
96
97 // Takes a bunch of arguments, even though unused, to test
98 // if the caller's frame is extended enough to spill these arguments.
99 static void m(int a0, int a1, int a2, int a3) {
100 if (armed) {
101 // Trigger uncommon trap from this frame
102 WB.verifyFrames(/*log=*/true, /*updateRegisterMap=*/true);
103 WB.verifyFrames(/*log=*/true, /*updateRegisterMap=*/false); // triggers different code paths
104 }
105 }
106
107 }