archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-09-18 01:54:47 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

8291360: Create entry points to expose low-level class file information

Browse source 
Reviewed-by: dholmes, rriggs
This commit is contained in:
Harold Seigel 2022-08-04 13:13:01 +00:00
parent ce61eb6ff9
commit a3040fcc2b
9 changed files with 812 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

91
test/hotspot/jtreg/runtime/ClassFile/ClassFileVersionTest.java Normal file
View file

@ -0,0 +1,91 @@
/*
* Copyright (c) 2022, 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
* @bug 8291360
* @summary Test getting the class file version for java.lang.Class API
* @modules java.base/java.lang:open
* @compile classFileVersions.jcod
* @run main/othervm --enable-preview ClassFileVersionTest
*/
import java.lang.reflect.*;
public class ClassFileVersionTest {
static Method m;
public static void testIt(String className, int expectedResult) throws Exception {
Class<?> testClass = Class.forName(className);
int ver = (int)m.invoke(testClass);
if (ver != expectedResult) {
int exp_minor = (expectedResult >> 16) & 0x0000FFFF;
int exp_major = expectedResult & 0x0000FFFF;
int got_minor = (ver >> 16) & 0x0000FFFF;
int got_major = ver & 0x0000FFFF;
throw new RuntimeException(
"Expected " + exp_minor + ":" + exp_major + " but got " + got_minor + ":" + got_major);
}
}
public static void main(String argv[]) throws Throwable {
Class<?> cl = java.lang.Class.class;
m = cl.getDeclaredMethod("getClassFileVersion", new Class[0]);
m.setAccessible(true);
testIt("Version64", 64);
testIt("Version59", 59);
testIt("Version45_3", 0x3002D); // 3:45
// test minor version of 65535.
testIt("Version64_65535", 0xFFFF0040); // 0xFFFF0040 = 65535:64
// test primitive array. should return latest version.
int ver = (int)m.invoke((new int[3]).getClass());
if (ver != 64) {
int got_minor = (ver >> 16) & 0x0000FFFF;
int got_major = ver & 0x0000FFFF;
throw new RuntimeException(
"Expected 0:64, but got " + got_minor + ":" + got_major + " for primitive array");
}
// test object array. should return class file version of component.
ver = (int)m.invoke((new Version59[2]).getClass());
if (ver != 59) {
int got_minor = (ver >> 16) & 0x0000FFFF;
int got_major = ver & 0x0000FFFF;
throw new RuntimeException(
"Expected 0:59, but got " + got_minor + ":" + got_major + " for object array");
}
// test multi-dimensional object array. should return class file version of component.
ver = (int)m.invoke((new Version59[3][2]).getClass());
if (ver != 59) {
int got_minor = (ver >> 16) & 0x0000FFFF;
int got_major = ver & 0x0000FFFF;
throw new RuntimeException(
"Expected 0:59, but got " + got_minor + ":" + got_major + " for object array");
}
}
}