--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/serviceability/sa/TestJhsdbJstackMixed.java Mon Jul 23 18:08:46 2018 +0200
@@ -0,0 +1,187 @@
+/*
+ * Copyright (c) 2018, 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.
+ */
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import jdk.test.lib.JDKToolLauncher;
+import jdk.test.lib.Utils;
+import jdk.test.lib.apps.LingeredApp;
+import jdk.test.lib.process.OutputAnalyzer;
+
+/**
+ * @test
+ * @bug 8208091
+ * @requires (os.family == "linux") & (vm.hasSAandCanAttach)
+ * @library /test/lib
+ * @run main/othervm TestJhsdbJstackMixed
+ */
+public class TestJhsdbJstackMixed {
+
+ private static final int MAX_ITERATIONS = 20;
+ private static final String NATIVE_FUNCTION_NAME = "fib";
+ private static final String LINE_MATCHER_STR = ".*" + NATIVE_FUNCTION_NAME
+ + ".*";
+ private static final Pattern LINE_PATTERN = Pattern
+ .compile(LINE_MATCHER_STR);
+ private static final String HEX_STR_PATTERN = "0x([a-fA-F0-9]+)";
+ private static final String FIB_SPLIT_PATTERN = NATIVE_FUNCTION_NAME
+ + "\\s+\\+";
+ private static final Pattern HEX_PATTERN = Pattern.compile(HEX_STR_PATTERN);
+ private static final int ADDRESS_ALIGNMENT_X86 = 4;
+
+ /*
+ * UnmappedAddressException will be thrown iff:
+ * - The JNI code is being compiled with -fomit-frame-pointer AND
+ * - The JNI code is currently executing at address A = pc() + offset
+ * where A % ADDRESS_SIZE == 0.
+ *
+ * In the below example we have: pc() == f6401546, offset == 56,
+ * ADDRESS_SIZE == 4. Thus, A == F640159C which satisfies this condition.
+ *
+ * "NoFramePointerJNIFib" #11 prio=5 tid=0xa357bc00 nid=0x6de9 runnable [0xa365b000]
+ * java.lang.Thread.State: RUNNABLE
+ * JavaThread state: _thread_in_native
+ * 0xf6401546 fib + 0x56
+ */
+ private static boolean isFibAndAlignedAddress(List<String> lines) {
+ List<String> fibLines = findFibLines(lines);
+ System.out.println("DEBUG: " + fibLines);
+ // we're only interested in the first matched line.
+ if (fibLines.size() >= 1) {
+ String line = fibLines.get(0);
+ return isMatchLine(line);
+ }
+ return false;
+ }
+
+ private static boolean isMatchLine(String line) {
+ String[] tokens = line.split(FIB_SPLIT_PATTERN);
+ if (tokens.length != 2) {
+ return false; // NOT exactly two tokens, ignore.
+ }
+ String pcRaw = tokens[0].trim();
+ String offsetRaw = tokens[1].trim();
+ Matcher matcher = HEX_PATTERN.matcher(pcRaw);
+ long pcVal = 3;
+ boolean pcMatched = matcher.matches();
+ if (pcMatched) {
+ String pc = matcher.group(1);
+ pcVal = Long.parseUnsignedLong(pc, 16);
+ }
+ matcher = HEX_PATTERN.matcher(offsetRaw);
+ long offsetVal = 0;
+ boolean offsetMatched = matcher.matches();
+ if (offsetMatched) {
+ String offset = matcher.group(1);
+ offsetVal = Long.parseUnsignedLong(offset, 16);
+ }
+ if (offsetMatched && pcMatched
+ && (pcVal + offsetVal) % ADDRESS_ALIGNMENT_X86 == 0) {
+ return true;
+ }
+ return false;
+ }
+
+ private static List<String> findFibLines(List<String> lines) {
+ boolean startReached = false;
+ boolean endReached = false;
+ List<String> interestingLines = new ArrayList<>();
+ for (String line : lines) {
+ if (line.contains(LingeredAppWithNativeMethod.THREAD_NAME)) {
+ startReached = true;
+ }
+ if (startReached && line.contains("-------")) {
+ endReached = true;
+ }
+ if (startReached && !endReached) {
+ Matcher matcher = LINE_PATTERN.matcher(line);
+ if (matcher.matches()) {
+ interestingLines.add(line);
+ }
+ }
+ }
+ return interestingLines;
+ }
+
+ private static void runJstackMixedInLoop(LingeredApp app) throws Exception {
+ for (int i = 0; i < MAX_ITERATIONS; i++) {
+ JDKToolLauncher launcher = JDKToolLauncher
+ .createUsingTestJDK("jhsdb");
+ launcher.addToolArg("jstack");
+ launcher.addToolArg("--mixed");
+ launcher.addToolArg("--pid");
+ launcher.addToolArg(Long.toString(app.getPid()));
+
+ ProcessBuilder pb = new ProcessBuilder();
+ pb.command(launcher.getCommand());
+ Process jhsdb = pb.start();
+ OutputAnalyzer out = new OutputAnalyzer(jhsdb);
+
+ jhsdb.waitFor();
+
+ System.out.println(out.getStdout());
+ System.err.println(out.getStderr());
+
+ out.shouldContain(LingeredAppWithNativeMethod.THREAD_NAME);
+ if (isFibAndAlignedAddress(out.asLines())) {
+ System.out.println("DEBUG: Test triggered interesting condition.");
+ out.shouldNotContain("sun.jvm.hotspot.debugger.UnmappedAddressException:");
+ System.out.println("DEBUG: Test PASSED.");
+ return; // If we've reached here, all is well.
+ }
+ System.out.println("DEBUG: Iteration: " + (i + 1)
+ + " - Test didn't trigger interesting condition.");
+ out.shouldNotContain("sun.jvm.hotspot.debugger.UnmappedAddressException:");
+ }
+ System.out.println("DEBUG: Test didn't trigger interesting condition " +
+ "but no UnmappedAddressException was thrown. PASS!");
+ }
+
+ public static void main(String... args) throws Exception {
+
+ LingeredApp app = null;
+
+ try {
+ List<String> vmArgs = new ArrayList<String>(Utils.getVmOptions());
+ // Needed for LingeredApp to be able to resolve native library.
+ String libPath = System.getProperty("java.library.path");
+ if (libPath != null) {
+ vmArgs.add("-Djava.library.path=" + libPath);
+ }
+
+ app = new LingeredAppWithNativeMethod();
+ LingeredApp.startApp(vmArgs, app);
+ System.out.println("Started LingeredApp with pid " + app.getPid());
+ runJstackMixedInLoop(app);
+ System.out.println("Test Completed");
+ } catch (Throwable e) {
+ e.printStackTrace();
+ throw e;
+ } finally {
+ LingeredApp.stopApp(app);
+ }
+ }
+}