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/*
* Copyright (c) 2020, 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.
*/
package compiler.debug;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.Asserts;
/*
* @test
* @key stress randomness
* @bug 8253765
* @requires vm.debug == true & vm.compiler2.enabled
* @summary Tests that, when compiling with StressLCM or StressGCM, using the
* same seed yields the same code motion trace.
* @library /test/lib /
* @run driver compiler.debug.TestStressCM StressLCM
* @run driver compiler.debug.TestStressCM StressGCM
*/
public class TestStressCM {
static String cmTrace(String stressOpt, int stressSeed) throws Exception {
String className = TestStressCM.class.getName();
String[] procArgs = {
"-Xcomp", "-XX:-TieredCompilation", "-XX:-Inline",
"-XX:CompileOnly=" + className + "::sum",
"-XX:+TraceOptoPipelining", "-XX:+" + stressOpt,
"-XX:StressSeed=" + stressSeed, className, "10"};
ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder(procArgs);
OutputAnalyzer out = new OutputAnalyzer(pb.start());
out.shouldHaveExitValue(0);
// Extract the trace of our method (the last one after those of all
// mandatory stubs such as _new_instance_Java, etc.).
String [] traces = out.getStdout().split("\\R");
int start = -1;
for (int i = traces.length - 1; i >= 0; i--) {
if (traces[i].contains("Start GlobalCodeMotion")) {
start = i;
break;
}
}
// We should have found the start of the trace.
Asserts.assertTrue(start >= 0,
"could not find the code motion trace");
String trace = "";
for (int i = start; i < traces.length; i++) {
trace += traces[i] + "\n";
}
return trace;
}
static void sum(int n) {
int acc = 0;
for (int i = 0; i < n; i++) acc += i;
System.out.println(acc);
}
public static void main(String[] args) throws Exception {
if (args[0].startsWith("Stress")) {
String stressOpt = args[0];
for (int s = 0; s < 10; s++) {
Asserts.assertEQ(cmTrace(stressOpt, s), cmTrace(stressOpt, s),
"got different code motion traces for the same seed " + s);
}
} else if (args.length > 0) {
sum(Integer.parseInt(args[0]));
}
}
}
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