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/*
* Copyright (c) 2021, 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 8262912
* @library / /test/lib
* @summary Test class resolution based on whitelist created by ciInstanceKlass entries in replay file.
* @requires vm.flightRecorder != true & vm.compMode != "Xint" & vm.debug == true & vm.compiler2.enabled
* @modules java.base/jdk.internal.misc
* @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
* compiler.ciReplay.TestUnresolvedClasses
*/
package compiler.ciReplay;
import jdk.test.lib.Asserts;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.nio.file.Path;
import java.nio.file.StandardOpenOption;
import java.util.ArrayList;
import java.util.List;
public class TestUnresolvedClasses extends CiReplayBase {
private static final String LOG_FILE = "hotspot.log";
private static final String[] COMMAND_LINE = new String[] {"-XX:LogFile='" + LOG_FILE + "'", "-XX:+LogCompilation", "-XX:+PrintIdeal",
"-XX:CompileCommand=dontinline,compiler.ciReplay.Test::dontInline"};
public static void main(String[] args) {
new TestUnresolvedClasses().runTest(false, TIERED_DISABLED_VM_OPTION);
}
@Override
public String getTestClass() {
return Test.class.getName();
}
@Override
public void testAction() {
positiveTest(COMMAND_LINE);
// Should find CallStaticJava node for dontInline() as f.bar() is resolved and parsing completes.
checkLogFile(true);
// Remove ciInstanceKlass entry for Foo in replay file.
try {
Path replayFilePath = Paths.get(REPLAY_FILE_NAME);
List<String> replayContent = Files.readAllLines(replayFilePath);
List<String> newReplayContent = new ArrayList<>();
boolean foundFoo = false;
for (String line : replayContent) {
if (!line.startsWith("ciInstanceKlass compiler/ciReplay/Foo")) {
newReplayContent.add(line);
} else {
foundFoo = true;
}
}
Asserts.assertTrue(foundFoo, "Did not find ciInstanceKlass compiler/ciReplay/Foo entry");
Files.write(replayFilePath, newReplayContent, StandardOpenOption.TRUNCATE_EXISTING);
} catch (IOException ioe) {
throw new Error("Failed to read/write replay data: " + ioe, ioe);
}
positiveTest(COMMAND_LINE);
// No ciInstanceKlass entry for Foo is found in the replay. Replay compilation simulates that Foo is unresolved.
// Therefore, C2 cannot resolve f.bar() at parsing time. It emits an UCT to resolve Foo and stops parsing.
// The call to dontInline() will not be parsed and thus we should not find a CallStaticJava node for it.
checkLogFile(false);
remove(LOG_FILE);
}
// Parse <ideal> entry in hotspot.log file and try to find the call for dontInline().
private void checkLogFile(boolean shouldMatch) {
String toMatch = "Test::dontInline";
try (var br = Files.newBufferedReader(Paths.get(LOG_FILE))) {
String line;
boolean printIdealLine = false;
while ((line = br.readLine()) != null) {
if (printIdealLine) {
if (line.startsWith("</ideal")) {
break;
}
if (line.contains(toMatch)) {
Asserts.assertTrue(line.contains("CallStaticJava"), "must be CallStaticJava node");
Asserts.assertTrue(shouldMatch, "Should not have found " + toMatch);
return;
}
} else {
printIdealLine = line.startsWith("<ideal");
}
}
} catch (IOException e) {
throw new Error("Failed to read " + LOG_FILE + " data: " + e, e);
}
Asserts.assertFalse(shouldMatch, "Should have found " + toMatch);
}
}
class Test {
static Foo f = new Foo();
public static void main(String[] args) {
for (int i = 0; i < 10000; i++) {
test();
}
}
public static void test() {
f.bar();
// At replay compilation: Should emit UCT for f.bar() because class Foo is unloaded. Parsing stops here.
// dontInline() is not parsed anymore.
dontInline();
}
// Not inlined
public static void dontInline() {
}
}
class Foo {
public int bar() {
return 3;
}
}
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