/* * Copyright (c) 2014, 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.
*/
/** * The helper class for running jps utility and verifying output from it
*/ publicfinalclass JpsHelper {
/** * Helper class for handling jps arguments
*/ publicenum JpsArg {
q,
l,
m,
v,
V;
/** * Generate all possible combinations of {@link JpsArg} * (31 argument combinations and no arguments case)
*/ publicstatic List<List<JpsArg>> generateCombinations() { finalint argCount = JpsArg.values().length; // If there are more than 30 args this algorithm will overflow.
Asserts.assertLessThan(argCount, 31, "Too many args");
List<List<JpsArg>> combinations = new ArrayList<>(); int combinationCount = (int) Math.pow(2, argCount); for (int currCombo = 0; currCombo < combinationCount; ++currCombo) {
List<JpsArg> combination = new ArrayList<>(); for (int position = 0; position < argCount; ++position) { int bit = 1 << position; if ((bit & currCombo) != 0) {
combination.add(JpsArg.values()[position]);
}
}
combinations.add(combination);
} return combinations;
}
/** * Return combination of {@link JpsArg} as a String array
*/ publicstatic String[] asCmdArray(List<JpsArg> jpsArgs) {
List<String> list = new ArrayList<>(); for (JpsArg jpsArg : jpsArgs) {
list.add("-" + jpsArg.toString());
} return list.toArray(new String[list.size()]);
}
}
/** * VM flag to start test application with
*/ publicstaticfinal String VM_FLAG = "+DisableExplicitGC";
privatestatic File vmFlagsFile = null; /** * VM arguments to start test application with. * -XX:+UsePerfData is required for running the tests on embedded platforms.
*/ privatestatic String[] testVmArgs = { "-XX:+UsePerfData", "-Xmx512m", "-Xlog:gc", "-Dmultiline.prop=value1\nvalue2\r\nvalue3", "-XX:PerfMaxStringConstLength=8K", // avoid VM flags truncations for "jps -v" null/* lazily initialized -XX:Flags */}; privatestatic File manifestFile = null;
/** * Create a file containing VM_FLAG in the working directory
*/ publicstatic File getVmFlagsFile() throws IOException { if (vmFlagsFile == null) {
vmFlagsFile = new File("vmflags"); try (BufferedWriter output = new BufferedWriter(new FileWriter(vmFlagsFile))) {
output.write(VM_FLAG);
}
vmFlagsFile.deleteOnExit();
} return vmFlagsFile;
}
/** * Return a list of VM arguments
*/ publicstatic String[] getVmArgs() throws IOException { if (testVmArgs[testVmArgs.length - 1] == null) {
testVmArgs[testVmArgs.length - 1] = "-XX:Flags=" + getVmFlagsFile().getAbsolutePath();
} return testVmArgs;
}
/** * Start jps utility without any arguments
*/ publicstatic OutputAnalyzer jps() throws Exception { return jps(null, null);
}
/** * Verify jps stdout contains only pids and programs' name information. * jps stderr may contain VM warning messages which will be ignored. * * The output can look like: * 35536 Jps * 35417 Main * 31103 org.eclipse.equinox.launcher_1.3.0.v20120522-1813.jar
*/ publicstaticvoid verifyJpsOutput(OutputAnalyzer output, String regex) {
output.shouldHaveExitValue(0);
output.stdoutShouldMatchByLine(regex);
output.stderrShouldNotMatch("[E|e]xception");
output.stderrShouldNotMatch("[E|e]rror");
}
/** * Compare jps output with a content in a file line by line
*/ publicstaticvoid verifyOutputAgainstFile(OutputAnalyzer output) throws IOException {
String testSrc = System.getProperty("test.src", "?");
Path path = Paths.get(testSrc, "usage.out");
List<String> fileOutput = Files.readAllLines(path);
List<String> outputAsLines = output.asLines();
assertTrue(outputAsLines.containsAll(fileOutput), "The ouput should contain all content of " + path.toAbsolutePath());
}
boolean isQuiet = false; boolean isFull = false;
String pattern; for (JpsHelper.JpsArg jpsArg : combination) { switch (jpsArg) { case q: // If '-q' is specified output should contain only a list of local VM identifiers: // 30673
isQuiet = true;
JpsHelper.verifyJpsOutput(output, "^\\d+$");
output.shouldContain(Long.toString(pid)); break; case l: // If '-l' is specified output should contain the full package name for the application's main class // or the full path name to the application's JAR file: // 30673 /tmp/jtreg/jtreg-workdir/scratch/LingeredAppForJps.jar ...
isFull = true;
pattern = "^" + pid + "\\s+" + replaceSpecialChars(fullProcessName) + ".*";
output.shouldMatch(pattern); break; case m: // If '-m' is specified output should contain the arguments passed to the main method: // 30673 LingeredAppForJps lockfilename ...
pattern = "^" + pid + ".*" + replaceSpecialChars(argument) + ".*";
output.shouldMatch(pattern); break; case v: // If '-v' is specified output should contain VM arguments: // 30673 LingeredAppForJps -Xmx512m -XX:+UseParallelGC -XX:Flags=/tmp/jtreg/jtreg-workdir/scratch/vmflags ... for (String vmArg : JpsHelper.getVmArgs()) {
pattern = "^" + pid + ".*" + replaceSpecialChars(vmArg) + ".*";
output.shouldMatch(pattern);
} break; case V: // If '-V' is specified output should contain VM flags: // 30673 LingeredAppForJps +DisableExplicitGC ...
pattern = "^" + pid + ".*" + replaceSpecialChars(JpsHelper.VM_FLAG) + ".*";
output.shouldMatch(pattern); break;
}
if (isQuiet) { break;
}
}
if (!isQuiet) { // Verify output line by line. // Output should only contain lines with pids after the first line with pid.
JpsHelper.verifyJpsOutput(output, "^\\d+\\s+.*"); if (!isFull) {
pattern = "^" + pid + "\\s+" + replaceSpecialChars(processName); if (combination.isEmpty()) { // If no arguments are specified output should only contain // pid and process name
pattern += "$";
} else {
pattern += ".*";
}
output.shouldMatch(pattern);
}
}
}
}
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