19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test TestSelectDefaultGC 26 * @summary Test selection of GC when no GC option is specified 27 * @bug 8068582 28 * @key gc 29 * @library /testlibrary 30 * @modules java.base/sun.misc 31 * java.management 32 * @run driver TestSelectDefaultGC 33 */ 34 35 import jdk.test.lib.*; 36 import java.util.regex.*; 37 38 public class TestSelectDefaultGC { 39 public static boolean versionStringContains(OutputAnalyzer output, String pattern) { 40 Matcher matcher = Pattern.compile(pattern, Pattern.MULTILINE).matcher(output.getStderr()); 41 return matcher.find(); 42 } 43 44 public static void assertVMOption(OutputAnalyzer output, String option, boolean value) { 45 output.shouldMatch(" " + option + " .*=.* " + value + " "); 46 } 47 48 public static void main(String[] args) throws Exception { 49 // Start VM without specifying GC 50 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+PrintFlagsFinal", "-version"); 51 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 52 output.shouldHaveExitValue(0); 53 54 boolean isServerVM = versionStringContains(output, "Server VM"); 55 56 // Verify GC selection 57 assertVMOption(output, "UseParallelGC", isServerVM); 58 assertVMOption(output, "UseParallelOldGC", isServerVM); 59 assertVMOption(output, "UseSerialGC", !isServerVM); 60 assertVMOption(output, "UseConcMarkSweepGC", false); 61 assertVMOption(output, "UseG1GC", false); 62 assertVMOption(output, "UseParNewGC", false); 63 } 64 } | 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test TestSelectDefaultGC 26 * @summary Test selection of GC when no GC option is specified 27 * @bug 8068582 28 * @key gc 29 * @library /testlibrary 30 * @modules java.base/sun.misc 31 * java.management 32 * @run driver TestSelectDefaultGC 33 */ 34 35 import jdk.test.lib.*; 36 import java.util.regex.*; 37 38 public class TestSelectDefaultGC { 39 public static void assertVMOption(OutputAnalyzer output, String option, boolean value) { 40 output.shouldMatch(" " + option + " .*=.* " + value + " "); 41 } 42 43 public static void main(String[] args) throws Exception { 44 // Start VM without specifying GC 45 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+PrintFlagsFinal", "-version"); 46 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 47 output.shouldHaveExitValue(0); 48 49 boolean isServerVM = Platform.isServer(); 50 boolean isEmbeddedVM = Platform.isEmbedded(); 51 52 // Verify GC selection 53 // G1 is default for non-embedded server VMs 54 assertVMOption(output, "UseG1GC", isServerVM && !isEmbeddedVM); 55 // Parallel is default for embedded server VMs 56 assertVMOption(output, "UseParallelGC", isServerVM && isEmbeddedVM); 57 assertVMOption(output, "UseParallelOldGC", isServerVM && isEmbeddedVM); 58 // Serial is default for non-server VMs 59 assertVMOption(output, "UseSerialGC", !isServerVM); 60 assertVMOption(output, "UseConcMarkSweepGC", false); 61 assertVMOption(output, "UseParNewGC", false); 62 } 63 } |