1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
|
/*
* Copyright (c) 2021, 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 id=default_gc
* @enablePreview
* @bug 8277602
* @requires jdk.foreign.linker != "UNSUPPORTED"
* @library /test/lib
* @library ../
* @build jdk.test.whitebox.WhiteBox
* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
*
* @run main/othervm
* -Xbootclasspath/a:.
* -XX:+UnlockDiagnosticVMOptions
* -XX:+WhiteBoxAPI
* --enable-native-access=ALL-UNNAMED
* -Xbatch
* TestUpcallDeopt
*/
import java.lang.foreign.Arena;
import java.lang.foreign.Linker;
import java.lang.foreign.FunctionDescriptor;
import java.lang.foreign.MemorySegment;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodType;
import java.lang.ref.Reference;
import jdk.test.whitebox.WhiteBox;
import static java.lang.invoke.MethodHandles.lookup;
public class TestUpcallDeopt extends NativeTestHelper {
static final WhiteBox WB = WhiteBox.getWhiteBox();
static final Linker linker = Linker.nativeLinker();
static final MethodHandle MH_foo;
static final MethodHandle MH_m;
static {
try {
System.loadLibrary("UpcallDeopt");
MH_foo = linker.downcallHandle(
findNativeOrThrow("foo"),
FunctionDescriptor.ofVoid(C_POINTER, C_INT, C_INT, C_INT, C_INT));
MH_m = lookup().findStatic(TestUpcallDeopt.class, "m",
MethodType.methodType(void.class, int.class, int.class, int.class, int.class));
} catch (ReflectiveOperationException e) {
throw new RuntimeException(e);
}
}
static boolean armed;
// we need to deoptimize through an uncommon trap in the callee of the optimized upcall stub
// that is created when calling upcallStub below
public static void main(String[] args) throws Throwable {
try (Arena arena = Arena.ofConfined()) {
MemorySegment stub = linker.upcallStub(MH_m, FunctionDescriptor.ofVoid(C_INT, C_INT, C_INT, C_INT), arena);
armed = false;
for (int i = 0; i < 20_000; i++) {
payload(stub); // warmup
}
armed = true;
payload(stub); // test
}
}
static void payload(MemorySegment cb) throws Throwable {
MH_foo.invokeExact(cb, 0, 1, 2, 3);
Reference.reachabilityFence(cb); // keep oop alive across call
}
// Takes a bunch of arguments, even though unused, to test
// if the caller's frame is extended enough to spill these arguments.
static void m(int a0, int a1, int a2, int a3) {
if (armed) {
// Trigger uncommon trap from this frame
WB.verifyFrames(/*log=*/true, /*updateRegisterMap=*/true);
WB.verifyFrames(/*log=*/true, /*updateRegisterMap=*/false); // triggers different code paths
}
}
}
|
