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/*
* Copyright (c) 2013, 2016, 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 IsMethodCompilableTest
* @bug 8007270 8006683 8007288 8022832
* @summary testing of WB::isMethodCompilable()
* @requires vm.flavor == "server" & (vm.opt.TieredStopAtLevel == null | vm.opt.TieredStopAtLevel == 4)
* @requires !vm.emulatedClient
* @library /test/lib /
* @modules java.base/jdk.internal.misc
* java.management
*
* @build sun.hotspot.WhiteBox
* @run driver ClassFileInstaller sun.hotspot.WhiteBox
* sun.hotspot.WhiteBox$WhiteBoxPermission
* @run main/othervm/timeout=2400 -XX:-TieredCompilation -Xmixed
* -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
* -XX:PerMethodRecompilationCutoff=3 -XX:-UseCounterDecay
* -XX:CompileCommand=compileonly,compiler.whitebox.SimpleTestCaseHelper::*
* compiler.whitebox.IsMethodCompilableTest
*/
package compiler.whitebox;
import jdk.test.lib.Platform;
public class IsMethodCompilableTest extends CompilerWhiteBoxTest {
/**
* Value of {@code -XX:PerMethodRecompilationCutoff}
*/
protected static final long PER_METHOD_RECOMPILATION_CUTOFF;
static {
long tmp = Long.parseLong(
getVMOption("PerMethodRecompilationCutoff", "400"));
if (tmp == -1) {
PER_METHOD_RECOMPILATION_CUTOFF = -1 /* Inf */;
} else {
PER_METHOD_RECOMPILATION_CUTOFF = (0xFFFFFFFFL & tmp);
}
}
public static void main(String[] args) throws Exception {
CompilerWhiteBoxTest.main(IsMethodCompilableTest::new, args);
}
private IsMethodCompilableTest(TestCase testCase) {
super(testCase);
// to prevent inlining of #method
WHITE_BOX.testSetDontInlineMethod(method, true);
}
/**
* Tests {@code WB::isMethodCompilable()} by recompilation of tested method
* 'PerMethodRecompilationCutoff' times and checks compilation status. Also
* checks that WB::clearMethodState() clears no-compilable flags. Only
* applicable to c2 compiled methods.
*
* @throws Exception if one of the checks fails.
*/
@Override
protected void test() throws Exception {
// Only c2 compilations can be disabled through PerMethodRecompilationCutoff
if (!Platform.isServer() || Platform.isEmulatedClient()) {
throw new Error("TESTBUG: Not server mode");
}
if (skipXcompOSR()) {
return;
}
if (!isCompilable(COMP_LEVEL_FULL_OPTIMIZATION)) {
throw new RuntimeException(method + " must be compilable");
}
System.out.println("PerMethodRecompilationCutoff = "
+ PER_METHOD_RECOMPILATION_CUTOFF);
if (PER_METHOD_RECOMPILATION_CUTOFF == -1) {
System.err.println(
"Warning: test is not applicable if PerMethodRecompilationCutoff == Inf");
return;
}
// deoptimize 'PerMethodRecompilationCutoff' times
for (long attempts = 0, successes = 0;
(successes < PER_METHOD_RECOMPILATION_CUTOFF) &&
(attempts < PER_METHOD_RECOMPILATION_CUTOFF*2) &&
isCompilable(COMP_LEVEL_FULL_OPTIMIZATION); attempts++) {
if (compileAndDeoptimize() == COMP_LEVEL_FULL_OPTIMIZATION) {
successes++;
}
}
if (!testCase.isOsr() && !isCompilable(COMP_LEVEL_FULL_OPTIMIZATION)) {
// in osr test case count of deopt maybe more than iterations
throw new RuntimeException(method + " is not compilable after "
+ PER_METHOD_RECOMPILATION_CUTOFF + " iterations");
}
// Now compile once more
compileAndDeoptimize();
if (isCompilable(COMP_LEVEL_FULL_OPTIMIZATION)) {
throw new RuntimeException(method + " is still compilable after "
+ PER_METHOD_RECOMPILATION_CUTOFF + " iterations");
}
checkNotCompiled();
compile();
waitBackgroundCompilation();
checkNotCompiled(COMP_LEVEL_FULL_OPTIMIZATION);
// WB.clearMethodState() must reset no-compilable flags
WHITE_BOX.clearMethodState(method);
if (!isCompilable(COMP_LEVEL_FULL_OPTIMIZATION)) {
throw new RuntimeException(method
+ " is not compilable after clearMethodState()");
}
compile();
checkCompiled();
}
private int compileAndDeoptimize() throws Exception {
compile();
waitBackgroundCompilation();
int compLevel = getCompLevel();
deoptimize();
return compLevel;
}
}
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