--- /dev/null 2016-05-31 09:42:47.975716356 -0700
+++ new/src/jdk.vm.compiler/share/classes/org.graalvm.compiler.core.test/src/org/graalvm/compiler/core/test/AllocSpy.java 2016-12-07 13:48:12.992083749 -0800
@@ -0,0 +1,339 @@
+/*
+ * Copyright (c) 2011, 2014, 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.
+ */
+package org.graalvm.compiler.core.test;
+
+import static java.lang.Boolean.parseBoolean;
+import static java.lang.Integer.getInteger;
+import static java.lang.System.getProperty;
+
+import java.io.PrintStream;
+import java.lang.reflect.Field;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import com.google.monitoring.runtime.instrumentation.AllocationRecorder;
+import com.google.monitoring.runtime.instrumentation.Sampler;
+
+/**
+ * Tool for analyzing allocations within a scope using the
+ * Java Allocation
+ * Instrumenter. Allocation records are aggregated per stack trace at an allocation site. The
+ * size of the stack trace is governed by the value of the "AllocSpy.ContextSize" system property
+ * (default is 5).
+ *
+ * Using this facility requires using -javaagent on the command line. For example:
+ *
+ *
+ * mx --vm server unittest -javaagent:lib/java-allocation-instrumenter.jar -dsa -DAllocSpy.ContextSize=6 BC_iadd2
+ *
+ *
+ * @see #SampleBytes
+ * @see #SampleInstances
+ * @see #HistogramLimit
+ * @see #NameSize
+ * @see #BarSize
+ * @see #NumberSize
+ */
+public final class AllocSpy implements AutoCloseable {
+
+ static ThreadLocal current = new ThreadLocal<>();
+
+ private static final boolean ENABLED;
+
+ static {
+ boolean enabled = false;
+ try {
+ Field field = AllocationRecorder.class.getDeclaredField("instrumentation");
+ field.setAccessible(true);
+ enabled = field.get(null) != null;
+ } catch (Exception e) {
+ }
+ ENABLED = enabled;
+ if (ENABLED) {
+ AllocationRecorder.addSampler(new GraalContextSampler());
+ }
+ }
+
+ public static boolean isEnabled() {
+ return ENABLED;
+ }
+
+ static String prop(String sfx) {
+ return AllocSpy.class.getSimpleName() + "." + sfx;
+ }
+
+ /**
+ * Determines if bytes per allocation site are recorded.
+ */
+ private static final boolean SampleBytes = parseBoolean(getProperty(prop("SampleBytes"), "true"));
+
+ /**
+ * Determines if allocations per allocation site are recorded.
+ */
+ private static final boolean SampleInstances = parseBoolean(getProperty(prop("SampleInstances"), "true"));
+
+ /**
+ * The size of context to record for each allocation site in terms of Graal frames.
+ */
+ private static final int ContextSize = getInteger(prop("ContextSize"), 5);
+
+ /**
+ * Only the {@code HistogramLimit} most frequent values are printed.
+ */
+ private static final int HistogramLimit = getInteger(prop("HistogramLimit"), 40);
+
+ /**
+ * The width of the allocation context column.
+ */
+ private static final int NameSize = getInteger(prop("NameSize"), 50);
+
+ /**
+ * The width of the histogram bar column.
+ */
+ private static final int BarSize = getInteger(prop("BarSize"), 100);
+
+ /**
+ * The width of the frequency column.
+ */
+ private static final int NumberSize = getInteger(prop("NumberSize"), 10);
+
+ final Object name;
+ final AllocSpy parent;
+ final Map bytesPerGraalContext = new HashMap<>();
+ final Map instancesPerGraalContext = new HashMap<>();
+
+ public static AllocSpy open(Object name) {
+ if (ENABLED) {
+ return new AllocSpy(name);
+ }
+ return null;
+ }
+
+ private AllocSpy(Object name) {
+ this.name = name;
+ parent = current.get();
+ current.set(this);
+ }
+
+ @Override
+ public void close() {
+ current.set(parent);
+ PrintStream ps = System.out;
+ ps.println("\n\nAllocation histograms for " + name);
+ if (SampleBytes) {
+ print(ps, bytesPerGraalContext, "BytesPerGraalContext", HistogramLimit, NameSize + 60, BarSize);
+ }
+ if (SampleInstances) {
+ print(ps, instancesPerGraalContext, "InstancesPerGraalContext", HistogramLimit, NameSize + 60, BarSize);
+ }
+ }
+
+ private static void printLine(PrintStream printStream, char c, int lineSize) {
+ char[] charArr = new char[lineSize];
+ Arrays.fill(charArr, c);
+ printStream.printf("%s%n", new String(charArr));
+ }
+
+ private static void print(PrintStream ps, Map map, String name, int limit, int nameSize, int barSize) {
+ if (map.isEmpty()) {
+ return;
+ }
+
+ List list = new ArrayList<>(map.values());
+ Collections.sort(list);
+
+ // Sum up the total number of elements.
+ int total = 0;
+ for (CountedValue cv : list) {
+ total += cv.getCount();
+ }
+
+ // Print header.
+ ps.printf("%s has %d unique elements and %d total elements:%n", name, list.size(), total);
+
+ int max = list.get(0).getCount();
+ final int lineSize = nameSize + NumberSize + barSize + 10;
+ printLine(ps, '-', lineSize);
+ String formatString = "| %-" + nameSize + "s | %-" + NumberSize + "d | %-" + barSize + "s |\n";
+ for (int i = 0; i < list.size() && i < limit; ++i) {
+ CountedValue cv = list.get(i);
+ int value = cv.getCount();
+ char[] bar = new char[(int) (((double) value / (double) max) * barSize)];
+ Arrays.fill(bar, '=');
+ String[] lines = String.valueOf(cv.getValue()).split("\\n");
+
+ String objectString = lines[0];
+ if (objectString.length() > nameSize) {
+ objectString = objectString.substring(0, nameSize - 3) + "...";
+ }
+ ps.printf(formatString, objectString, value, new String(bar));
+ for (int j = 1; j < lines.length; j++) {
+ String line = lines[j];
+ if (line.length() > nameSize) {
+ line = line.substring(0, nameSize - 3) + "...";
+ }
+ ps.printf("| %-" + (nameSize - 2) + "s | %-" + NumberSize + "s | %-" + barSize + "s |%n", line, " ", " ");
+
+ }
+ }
+ printLine(ps, '-', lineSize);
+ }
+
+ CountedValue bytesPerGraalContext(String context) {
+ return getCounter(context, bytesPerGraalContext);
+ }
+
+ CountedValue instancesPerGraalContext(String context) {
+ return getCounter(context, instancesPerGraalContext);
+ }
+
+ protected static CountedValue getCounter(String desc, Map map) {
+ CountedValue count = map.get(desc);
+ if (count == null) {
+ count = new CountedValue(0, desc);
+ map.put(desc, count);
+ }
+ return count;
+ }
+
+ private static final String[] Excluded = {AllocSpy.class.getName(), AllocationRecorder.class.getName()};
+
+ private static boolean excludeFrame(String className) {
+ for (String e : Excluded) {
+ if (className.startsWith(e)) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ static class GraalContextSampler implements Sampler {
+
+ @Override
+ public void sampleAllocation(int count, String desc, Object newObj, long size) {
+ AllocSpy scope = current.get();
+ if (scope != null) {
+ StringBuilder sb = new StringBuilder(200);
+ Throwable t = new Throwable();
+ int remainingGraalFrames = ContextSize;
+ for (StackTraceElement e : t.getStackTrace()) {
+ if (remainingGraalFrames < 0) {
+ break;
+ }
+ String className = e.getClassName();
+ boolean isGraalFrame = className.contains(".graal.");
+ if (sb.length() != 0) {
+ append(sb.append('\n'), e);
+ } else {
+ if (!excludeFrame(className)) {
+ sb.append("type=").append(desc);
+ if (count != -1) {
+ sb.append('[').append(count).append(']');
+ }
+ append(sb.append('\n'), e);
+ }
+ }
+ if (isGraalFrame) {
+ remainingGraalFrames--;
+ }
+ }
+ String context = sb.toString();
+ if (SampleBytes) {
+ scope.bytesPerGraalContext(context).add((int) size);
+ }
+ if (SampleInstances) {
+ scope.instancesPerGraalContext(context).inc();
+ }
+ }
+ }
+
+ protected StringBuilder append(StringBuilder sb, StackTraceElement e) {
+ String className = e.getClassName();
+ int period = className.lastIndexOf('.');
+ if (period != -1) {
+ sb.append(className, period + 1, className.length());
+ } else {
+ sb.append(className);
+ }
+ sb.append('.').append(e.getMethodName());
+ if (e.isNativeMethod()) {
+ sb.append("(Native Method)");
+ } else if (e.getFileName() != null && e.getLineNumber() >= 0) {
+ sb.append('(').append(e.getFileName()).append(':').append(e.getLineNumber()).append(")");
+ } else {
+ sb.append("(Unknown Source)");
+ }
+ return sb;
+ }
+ }
+
+ /**
+ * A value and a frequency. The ordering imposed by {@link #compareTo(CountedValue)} places
+ * values with higher frequencies first.
+ */
+ static class CountedValue implements Comparable {
+
+ private int count;
+ private final Object value;
+
+ CountedValue(int count, Object value) {
+ this.count = count;
+ this.value = value;
+ }
+
+ @Override
+ public int compareTo(CountedValue o) {
+ if (count < o.count) {
+ return 1;
+ } else if (count > o.count) {
+ return -1;
+ }
+ return 0;
+ }
+
+ @Override
+ public String toString() {
+ return count + " -> " + value;
+ }
+
+ public void inc() {
+ count++;
+ }
+
+ public void add(int n) {
+ count += n;
+ }
+
+ public int getCount() {
+ return count;
+ }
+
+ public Object getValue() {
+ return value;
+ }
+ }
+}