8009125: Add NMT tests for Virtual Memory operations

Summary: Tests added for Reserve/Commit/Uncommit/Unreserve operations
Reviewed-by: zgu, mgerdin

src/share/vm/prims/whitebox.cpp

@@ -118,45 +118,46 @@ WB_END
 #endif // INCLUDE_ALL_GCS
 
 #ifdef INCLUDE_NMT
-// Keep track of the 3 allocations in NMTAllocTest so we can free them later
-// on and verify that they're not visible anymore
-static void* nmtMtTest1 = NULL, *nmtMtTest2 = NULL, *nmtMtTest3 = NULL;
-
 // Alloc memory using the test memory type so that we can use that to see if
 // NMT picks it up correctly
-WB_ENTRY(jboolean, WB_NMTAllocTest(JNIEnv* env))
-  void *mem;
+WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
+  jlong addr = 0;
 
-  if (!MemTracker::is_on() || MemTracker::shutdown_in_progress()) {
-    return false;
+  if (MemTracker::is_on() && !MemTracker::shutdown_in_progress()) {
+    addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
   }
 
-  // Allocate 2 * 128k + 256k + 1024k and free the 1024k one to make sure we track
-  // everything correctly. Total should be 512k held alive.
-  nmtMtTest1 = os::malloc(128 * 1024, mtTest);
-  mem = os::malloc(1024 * 1024, mtTest);
-  nmtMtTest2 = os::malloc(256 * 1024, mtTest);
-  os::free(mem, mtTest);
-  nmtMtTest3 = os::malloc(128 * 1024, mtTest);
-
-  return true;
+  return addr;
 WB_END
 
 // Free the memory allocated by NMTAllocTest
-WB_ENTRY(jboolean, WB_NMTFreeTestMemory(JNIEnv* env))
+WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
+  os::free((void*)(uintptr_t)mem, mtTest);
+WB_END
 
-  if (nmtMtTest1 == NULL || nmtMtTest2 == NULL || nmtMtTest3 == NULL) {
-    return false;
+WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
+  jlong addr = 0;
+
+  if (MemTracker::is_on() && !MemTracker::shutdown_in_progress()) {
+    addr = (jlong)(uintptr_t)os::reserve_memory(size);
+    MemTracker::record_virtual_memory_type((address)addr, mtTest);
   }
 
-  os::free(nmtMtTest1, mtTest);
-  nmtMtTest1 = NULL;
-  os::free(nmtMtTest2, mtTest);
-  nmtMtTest2 = NULL;
-  os::free(nmtMtTest3, mtTest);
-  nmtMtTest3 = NULL;
+  return addr;
+WB_END
 
-  return true;
+
+WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
+  os::commit_memory((char *)(uintptr_t)addr, size);
+  MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
+WB_END
+
+WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
+  os::uncommit_memory((char *)(uintptr_t)addr, size);
+WB_END
+
+WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
+  os::release_memory((char *)(uintptr_t)addr, size);
 WB_END
 
 // Block until the current generation of NMT data to be merged, used to reliably test the NMT feature
@@ -340,9 +341,13 @@ static JNINativeMethod methods[] = {
   {CC"g1RegionSize",       CC"()I",                   (void*)&WB_G1RegionSize      },
 #endif // INCLUDE_ALL_GCS
 #ifdef INCLUDE_NMT
-  {CC"NMTAllocTest",       CC"()Z",                   (void*)&WB_NMTAllocTest      },
-  {CC"NMTFreeTestMemory",  CC"()Z",                   (void*)&WB_NMTFreeTestMemory },
-  {CC"NMTWaitForDataMerge",CC"()Z",                   (void*)&WB_NMTWaitForDataMerge},
+  {CC"NMTMalloc",           CC"(J)J",                 (void*)&WB_NMTMalloc          },
+  {CC"NMTFree",             CC"(J)V",                 (void*)&WB_NMTFree            },
+  {CC"NMTReserveMemory",    CC"(J)J",                 (void*)&WB_NMTReserveMemory   },
+  {CC"NMTCommitMemory",     CC"(JJ)V",                (void*)&WB_NMTCommitMemory    },
+  {CC"NMTUncommitMemory",   CC"(JJ)V",                (void*)&WB_NMTUncommitMemory  },
+  {CC"NMTReleaseMemory",    CC"(JJ)V",                (void*)&WB_NMTReleaseMemory   },
+  {CC"NMTWaitForDataMerge", CC"()Z",                  (void*)&WB_NMTWaitForDataMerge},
 #endif // INCLUDE_NMT
   {CC"deoptimizeAll",      CC"()V",                   (void*)&WB_DeoptimizeAll     },
   {CC"deoptimizeMethod",   CC"(Ljava/lang/reflect/Method;)I",

test/runtime/NMT/AllocTestType.java → test/runtime/NMT/MallocTestType.java

@@ -26,30 +26,33 @@
  * @summary Test consistency of NMT by leaking a few select allocations of the Test type and then verify visibility with jcmd
  * @key nmt jcmd
  * @library /testlibrary /testlibrary/whitebox
- * @build AllocTestType
+ * @build MallocTestType
  * @run main ClassFileInstaller sun.hotspot.WhiteBox
- * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail AllocTestType
+ * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail MallocTestType
  */
 
 import com.oracle.java.testlibrary.*;
 import sun.hotspot.WhiteBox;
 
-public class AllocTestType {
+public class MallocTestType {
 
   public static void main(String args[]) throws Exception {
     OutputAnalyzer output;
+    WhiteBox wb = WhiteBox.getWhiteBox();
 
     // Grab my own PID
     String pid = Integer.toString(ProcessTools.getProcessId());
     ProcessBuilder pb = new ProcessBuilder();
 
-    // Use WB API to alloc with the mtTest type
-    if (!WhiteBox.getWhiteBox().NMTAllocTest()) {
-      throw new Exception("Call to WB API NMTAllocTest() failed");
-    }
+    // Use WB API to alloc and free with the mtTest type
+    long memAlloc3 = wb.NMTMalloc(128 * 1024);
+    long memAlloc2 = wb.NMTMalloc(256 * 1024);
+    wb.NMTFree(memAlloc3);
+    long memAlloc1 = wb.NMTMalloc(512 * 1024);
+    wb.NMTFree(memAlloc2);
 
     // Use WB API to ensure that all data has been merged before we continue
-    if (!WhiteBox.getWhiteBox().NMTWaitForDataMerge()) {
+    if (!wb.NMTWaitForDataMerge()) {
       throw new Exception("Call to WB API NMTWaitForDataMerge() failed");
     }
 
@@ -59,12 +62,10 @@ public class AllocTestType {
     output.shouldContain("Test (reserved=512KB, committed=512KB)");
 
     // Free the memory allocated by NMTAllocTest
-    if (!WhiteBox.getWhiteBox().NMTFreeTestMemory()) {
-      throw new Exception("Call to WB API NMTFreeTestMemory() failed");
-    }
+    wb.NMTFree(memAlloc1);
 
     // Use WB API to ensure that all data has been merged before we continue
-    if (!WhiteBox.getWhiteBox().NMTWaitForDataMerge()) {
+    if (!wb.NMTWaitForDataMerge()) {
       throw new Exception("Call to WB API NMTWaitForDataMerge() failed");
     }
     output = new OutputAnalyzer(pb.start());

test/runtime/NMT/ThreadedMallocTestType.java

+/*
+ * Copyright (c) 2013, 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
+ * @key nmt jcmd
+ * @library /testlibrary /testlibrary/whitebox
+ * @build ThreadedMallocTestType
+ * @run main ClassFileInstaller sun.hotspot.WhiteBox
+ * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail ThreadedMallocTestType
+ */
+
+import com.oracle.java.testlibrary.*;
+import sun.hotspot.WhiteBox;
+
+public class ThreadedMallocTestType {
+  public static long memAlloc1;
+  public static long memAlloc2;
+  public static long memAlloc3;
+
+  public static void main(String args[]) throws Exception {
+    OutputAnalyzer output;
+    final WhiteBox wb = WhiteBox.getWhiteBox();
+
+    // Grab my own PID
+    String pid = Integer.toString(ProcessTools.getProcessId());
+    ProcessBuilder pb = new ProcessBuilder();
+
+    Thread allocThread = new Thread() {
+      public void run() {
+        // Alloc memory using the WB api
+        memAlloc1 = wb.NMTMalloc(128 * 1024);
+        memAlloc2 = wb.NMTMalloc(256 * 1024);
+        memAlloc3 = wb.NMTMalloc(512 * 1024);
+      }
+    };
+
+    allocThread.start();
+    allocThread.join();
+
+    // Use WB API to ensure that all data has been merged before we continue
+    if (!wb.NMTWaitForDataMerge()) {
+      throw new Exception("Call to WB API NMTWaitForDataMerge() failed");
+    }
+
+    // Run 'jcmd <pid> VM.native_memory summary'
+    pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary"});
+    output = new OutputAnalyzer(pb.start());
+    output.shouldContain("Test (reserved=896KB, committed=896KB)");
+
+    Thread freeThread = new Thread() {
+      public void run() {
+        // Free the memory allocated by NMTMalloc
+        wb.NMTFree(memAlloc1);
+        wb.NMTFree(memAlloc2);
+        wb.NMTFree(memAlloc3);
+      }
+    };
+
+    freeThread.start();
+    freeThread.join();
+
+    // Use WB API to ensure that all data has been merged before we continue
+    if (!wb.NMTWaitForDataMerge()) {
+      throw new Exception("Call to WB API NMTWaitForDataMerge() failed");
+    }
+
+    output = new OutputAnalyzer(pb.start());
+    output.shouldNotContain("Test (reserved=");
+  }
+}

test/runtime/NMT/ThreadedVirtualAllocTestType.java

+/*
+ * Copyright (c) 2013, 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
+ * @key nmt jcmd
+ * @library /testlibrary /testlibrary/whitebox
+ * @build ThreadedVirtualAllocTestType
+ * @run main ClassFileInstaller sun.hotspot.WhiteBox
+ * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail ThreadedVirtualAllocTestType
+ */
+
+import com.oracle.java.testlibrary.*;
+import sun.hotspot.WhiteBox;
+
+public class ThreadedVirtualAllocTestType {
+  public static long addr;
+  public static final WhiteBox wb = WhiteBox.getWhiteBox();
+  public static final long commitSize = 128 * 1024;
+  public static final long reserveSize = 512 * 1024;
+
+  public static void main(String args[]) throws Exception {
+    OutputAnalyzer output;
+
+    String pid = Integer.toString(ProcessTools.getProcessId());
+    ProcessBuilder pb = new ProcessBuilder();
+
+    Thread reserveThread = new Thread() {
+      public void run() {
+        addr = wb.NMTReserveMemory(reserveSize);
+      }
+    };
+    reserveThread.start();
+    reserveThread.join();
+
+    mergeData();
+
+    pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "detail"});
+    output = new OutputAnalyzer(pb.start());
+    output.shouldContain("Test (reserved=512KB, committed=0KB)");
+    output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" + Long.toHexString(addr + reserveSize) + "\\] reserved 512KB for Test");
+
+    Thread commitThread = new Thread() {
+      public void run() {
+        wb.NMTCommitMemory(addr, commitSize);
+      }
+    };
+    commitThread.start();
+    commitThread.join();
+
+    mergeData();
+
+    output = new OutputAnalyzer(pb.start());
+    output.shouldContain("Test (reserved=512KB, committed=128KB)");
+    output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" + Long.toHexString(addr + commitSize) + "\\] committed 128KB");
+
+    Thread uncommitThread = new Thread() {
+      public void run() {
+        wb.NMTUncommitMemory(addr, commitSize);
+      }
+    };
+    uncommitThread.start();
+    uncommitThread.join();
+
+    mergeData();
+
+    output = new OutputAnalyzer(pb.start());
+    output.shouldContain("Test (reserved=512KB, committed=0KB)");
+    output.shouldNotMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" + Long.toHexString(addr + commitSize) + "\\] committed");
+
+    Thread releaseThread = new Thread() {
+      public void run() {
+        wb.NMTReleaseMemory(addr, reserveSize);
+      }
+    };
+    releaseThread.start();
+    releaseThread.join();
+
+    mergeData();
+
+    output = new OutputAnalyzer(pb.start());
+    output.shouldNotContain("Test (reserved=");
+    output.shouldNotContain("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" + Long.toHexString(addr + reserveSize) + "\\] reserved");
+  }
+
+  public static void mergeData() throws Exception {
+    // Use WB API to ensure that all data has been merged before we continue
+    if (!wb.NMTWaitForDataMerge()) {
+      throw new Exception("Call to WB API NMTWaitForDataMerge() failed");
+    }
+  }
+}

test/runtime/NMT/VirtualAllocTestType.java

+/*
+ * Copyright (c) 2013, 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
+ * @summary Test Reserve/Commit/Uncommit/Release of virtual memory and that we track it correctly
+ * @key nmt jcmd
+ * @library /testlibrary /testlibrary/whitebox
+ * @build VirtualAllocTestType
+ * @run main ClassFileInstaller sun.hotspot.WhiteBox
+ * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail VirtualAllocTestType
+ */
+
+import com.oracle.java.testlibrary.*;
+import sun.hotspot.WhiteBox;
+
+public class VirtualAllocTestType {
+
+  public static WhiteBox wb = WhiteBox.getWhiteBox();
+  public static void main(String args[]) throws Exception {
+    OutputAnalyzer output;
+    long commitSize = 128 * 1024;
+    long reserveSize = 256 * 1024;
+    long addr;
+
+    String pid = Integer.toString(ProcessTools.getProcessId());
+    ProcessBuilder pb = new ProcessBuilder();
+
+    addr = wb.NMTReserveMemory(reserveSize);
+    mergeData();
+
+    pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "detail"});
+    output = new OutputAnalyzer(pb.start());
+    output.shouldContain("Test (reserved=256KB, committed=0KB)");
+    output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" + Long.toHexString(addr + reserveSize) + "\\] reserved 256KB for Test");
+
+    wb.NMTCommitMemory(addr, commitSize);
+
+    mergeData();
+
+    output = new OutputAnalyzer(pb.start());
+    output.shouldContain("Test (reserved=256KB, committed=128KB)");
+    output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" + Long.toHexString(addr + commitSize) + "\\] committed 128KB");
+
+    wb.NMTUncommitMemory(addr, commitSize);
+
+    mergeData();
+
+    output = new OutputAnalyzer(pb.start());
+    output.shouldContain("Test (reserved=256KB, committed=0KB)");
+    output.shouldNotMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" + Long.toHexString(addr + commitSize) + "\\] committed");
+
+    wb.NMTReleaseMemory(addr, reserveSize);
+
+    mergeData();
+
+    output = new OutputAnalyzer(pb.start());
+    output.shouldNotContain("Test (reserved=");
+    output.shouldNotMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" + Long.toHexString(addr + reserveSize) + "\\] reserved");
+  }
+
+  public static void mergeData() throws Exception {
+    // Use WB API to ensure that all data has been merged before we continue
+    if (!wb.NMTWaitForDataMerge()) {
+      throw new Exception("Call to WB API NMTWaitForDataMerge() failed");
+    }
+  }
+}

test/testlibrary/OutputAnalyzerTest.java

@@ -36,6 +36,11 @@ public class OutputAnalyzerTest {
     String stdout = "aaaaaa";
     String stderr = "bbbbbb";
 
+    // Regexps used for testing pattern matching of the test input
+    String stdoutPattern = "[a]";
+    String stderrPattern = "[b]";
+    String nonExistingPattern = "[c]";
+
     OutputAnalyzer output = new OutputAnalyzer(stdout, stderr);
 
     if (!stdout.equals(output.getStdout())) {
@@ -104,5 +109,68 @@ public class OutputAnalyzerTest {
     } catch (RuntimeException e) {
         // expected
     }
+
+    // Should match
+    try {
+        output.shouldMatch(stdoutPattern);
+        output.stdoutShouldMatch(stdoutPattern);
+        output.shouldMatch(stderrPattern);
+        output.stderrShouldMatch(stderrPattern);
+    } catch (RuntimeException e) {
+        throw new Exception("shouldMatch() failed", e);
+    }
+
+    try {
+        output.shouldMatch(nonExistingPattern);
+        throw new Exception("shouldMatch() failed to throw exception");
+    } catch (RuntimeException e) {
+        // expected
+    }
+
+    try {
+        output.stdoutShouldMatch(stderrPattern);
+        throw new Exception(
+                "stdoutShouldMatch() failed to throw exception");
+    } catch (RuntimeException e) {
+        // expected
+    }
+
+    try {
+        output.stderrShouldMatch(stdoutPattern);
+        throw new Exception(
+                "stderrShouldMatch() failed to throw exception");
+    } catch (RuntimeException e) {
+        // expected
+    }
+
+    // Should not match
+    try {
+        output.shouldNotMatch(nonExistingPattern);
+        output.stdoutShouldNotMatch(nonExistingPattern);
+        output.stderrShouldNotMatch(nonExistingPattern);
+    } catch (RuntimeException e) {
+        throw new Exception("shouldNotMatch() failed", e);
+    }
+
+    try {
+        output.shouldNotMatch(stdoutPattern);
+        throw new Exception("shouldNotMatch() failed to throw exception");
+    } catch (RuntimeException e) {
+        // expected
+    }
+
+    try {
+        output.stdoutShouldNotMatch(stdoutPattern);
+        throw new Exception("shouldNotMatch() failed to throw exception");
+    } catch (RuntimeException e) {
+        // expected
+    }
+
+    try {
+        output.stderrShouldNotMatch(stderrPattern);
+        throw new Exception("shouldNotMatch() failed to throw exception");
+    } catch (RuntimeException e) {
+        // expected
+    }
   }
 }

test/testlibrary/com/oracle/java/testlibrary/OutputAnalyzer.java

@@ -24,6 +24,8 @@
 package com.oracle.java.testlibrary;
 
 import java.io.IOException;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
 
 public final class OutputAnalyzer {
 
@@ -141,6 +143,103 @@ public final class OutputAnalyzer {
     }
   }
 
+  /**
+   * Verify that the stdout and stderr contents of output buffer matches
+   * the pattern
+   *
+   * @param pattern
+   * @throws RuntimeException If the pattern was not found
+   */
+  public void shouldMatch(String pattern) {
+      Matcher stdoutMatcher = Pattern.compile(pattern, Pattern.MULTILINE).matcher(stdout);
+      Matcher stderrMatcher = Pattern.compile(pattern, Pattern.MULTILINE).matcher(stderr);
+      if (!stdoutMatcher.find() && !stderrMatcher.find()) {
+          throw new RuntimeException("'" + pattern
+                  + "' missing from stdout/stderr: [" + stdout + stderr
+                  + "]\n");
+      }
+  }
+
+  /**
+   * Verify that the stdout contents of output buffer matches the
+   * pattern
+   *
+   * @param pattern
+   * @throws RuntimeException If the pattern was not found
+   */
+  public void stdoutShouldMatch(String pattern) {
+      Matcher matcher = Pattern.compile(pattern, Pattern.MULTILINE).matcher(stdout);
+      if (!matcher.find()) {
+          throw new RuntimeException("'" + pattern
+                  + "' missing from stdout: [" + stdout + "]\n");
+      }
+  }
+
+  /**
+   * Verify that the stderr contents of output buffer matches the
+   * pattern
+   *
+   * @param pattern
+   * @throws RuntimeException If the pattern was not found
+   */
+  public void stderrShouldMatch(String pattern) {
+      Matcher matcher = Pattern.compile(pattern, Pattern.MULTILINE).matcher(stderr);
+      if (!matcher.find()) {
+          throw new RuntimeException("'" + pattern
+                  + "' missing from stderr: [" + stderr + "]\n");
+      }
+  }
+
+  /**
+   * Verify that the stdout and stderr contents of output buffer does not
+   * match the pattern
+   *
+   * @param pattern
+   * @throws RuntimeException If the pattern was found
+   */
+  public void shouldNotMatch(String pattern) {
+      Matcher matcher = Pattern.compile(pattern, Pattern.MULTILINE).matcher(stdout);
+      if (matcher.find()) {
+          throw new RuntimeException("'" + pattern
+                  + "' found in stdout: [" + stdout + "]\n");
+      }
+      matcher = Pattern.compile(pattern, Pattern.MULTILINE).matcher(stderr);
+      if (matcher.find()) {
+          throw new RuntimeException("'" + pattern
+                  + "' found in stderr: [" + stderr + "]\n");
+      }
+  }
+
+  /**
+   * Verify that the stdout contents of output buffer does not match the
+   * pattern
+   *
+   * @param pattern
+   * @throws RuntimeException If the pattern was found
+   */
+  public void stdoutShouldNotMatch(String pattern) {
+      Matcher matcher = Pattern.compile(pattern, Pattern.MULTILINE).matcher(stdout);
+      if (matcher.find()) {
+          throw new RuntimeException("'" + pattern
+                  + "' found in stdout: [" + stdout + "]\n");
+      }
+  }
+
+  /**
+   * Verify that the stderr contents of output buffer does not match the
+   * pattern
+   *
+   * @param pattern
+   * @throws RuntimeException If the pattern was found
+   */
+  public void stderrShouldNotMatch(String pattern) {
+      Matcher matcher = Pattern.compile(pattern, Pattern.MULTILINE).matcher(stderr);
+      if (matcher.find()) {
+          throw new RuntimeException("'" + pattern
+                  + "' found in stderr: [" + stderr + "]\n");
+      }
+  }
+
   /**
    * Verifiy the exit value of the process
    *

test/testlibrary/whitebox/sun/hotspot/WhiteBox.java

@@ -80,8 +80,12 @@ public class WhiteBox {
   public native Object[]    parseCommandLine(String commandline, DiagnosticCommand[] args);
 
   // NMT
-  public native boolean NMTAllocTest();
-  public native boolean NMTFreeTestMemory();
+  public native long NMTMalloc(long size);
+  public native void NMTFree(long mem);
+  public native long NMTReserveMemory(long size);
+  public native void NMTCommitMemory(long addr, long size);
+  public native void NMTUncommitMemory(long addr, long size);
+  public native void NMTReleaseMemory(long addr, long size);
   public native boolean NMTWaitForDataMerge();
 
   // Compiler