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org.glowroot.agent.weaving.AdviceCache Maven / Gradle / Ivy
/*
* Copyright 2012-2018 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.glowroot.agent.weaving;
import java.io.File;
import java.io.IOException;
import java.lang.instrument.Instrumentation;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.regex.Pattern;
import org.glowroot.agent.shaded.com.google.common.annotations.VisibleForTesting;
import org.glowroot.agent.shaded.com.google.common.base.Supplier;
import org.glowroot.agent.shaded.com.google.common.collect.ImmutableList;
import org.glowroot.agent.shaded.com.google.common.collect.ImmutableMap;
import org.glowroot.agent.shaded.com.google.common.collect.ImmutableSet;
import org.glowroot.agent.shaded.com.google.common.collect.Iterables;
import org.glowroot.agent.shaded.com.google.common.collect.Lists;
import org.glowroot.agent.shaded.com.google.common.collect.Maps;
import org.glowroot.agent.shaded.com.google.common.collect.Sets;
import org.glowroot.agent.shaded.org.checkerframework.checker.nullness.qual.Nullable;
import org.glowroot.agent.shaded.org.slf4j.Logger;
import org.glowroot.agent.shaded.org.slf4j.LoggerFactory;
import org.glowroot.agent.config.PluginDescriptor;
import org.glowroot.agent.live.LiveWeavingServiceImpl;
import org.glowroot.agent.live.LiveWeavingServiceImpl.PointcutClassName;
import org.glowroot.agent.plugin.api.weaving.Shim;
import org.glowroot.agent.weaving.ClassLoaders.LazyDefinedClass;
import org.glowroot.agent.weaving.PluginDetail.MixinClass;
import org.glowroot.agent.weaving.PluginDetail.PointcutClass;
import org.glowroot.agent.weaving.PluginDetail.ShimClass;
import org.glowroot.agent.shaded.org.glowroot.common.config.InstrumentationConfig;
import org.glowroot.agent.shaded.org.glowroot.common.util.OnlyUsedByTests;
import org.glowroot.agent.shaded.org.glowroot.common.util.Versions;
import static org.glowroot.agent.shaded.com.google.common.base.Preconditions.checkNotNull;
public class AdviceCache {
private static final Logger logger = LoggerFactory.getLogger(AdviceCache.class);
private static final AtomicInteger jarFileCounter = new AtomicInteger();
private final ImmutableList pluginAdvisors;
private final ImmutableList shimTypes;
private final ImmutableList mixinTypes;
private final @Nullable Instrumentation instrumentation;
private final File tmpDir;
private volatile ImmutableList reweavableAdvisors;
private volatile ImmutableSet reweavableConfigVersions;
private volatile ImmutableList allAdvisors;
public AdviceCache(List pluginDescriptors,
List reweavableConfigs,
@Nullable Instrumentation instrumentation, File tmpDir) throws Exception {
List pluginAdvisors = Lists.newArrayList();
List shimTypes = Lists.newArrayList();
List mixinTypes = Lists.newArrayList();
Map lazyAdvisors = Maps.newHashMap();
for (PluginDescriptor pluginDescriptor : pluginDescriptors) {
PluginDetailBuilder builder = new PluginDetailBuilder(pluginDescriptor);
PluginDetail pluginDetail = builder.build();
pluginAdvisors.addAll(getAdvisors(pluginDetail.pointcutClasses()));
mixinTypes.addAll(getMixinTypes(pluginDetail.mixinClasses()));
shimTypes.addAll(getShimTypes(pluginDetail.shimClasses()));
List instrumentationConfigs =
pluginDescriptor.instrumentationConfigs();
for (InstrumentationConfig instrumentationConfig : instrumentationConfigs) {
instrumentationConfig.logValidationErrorsIfAny();
}
lazyAdvisors.putAll(AdviceGenerator.createAdvisors(instrumentationConfigs,
pluginDescriptor.id(), false));
}
for (Map.Entry entry : lazyAdvisors.entrySet()) {
pluginAdvisors.add(entry.getKey());
}
if (instrumentation == null) {
// instrumentation is null when debugging with LocalContainer
ClassLoader isolatedWeavingClassLoader = Thread.currentThread().getContextClassLoader();
checkNotNull(isolatedWeavingClassLoader);
ClassLoaders.defineClasses(lazyAdvisors.values(),
isolatedWeavingClassLoader);
} else {
ClassLoaders.createDirectoryOrCleanPreviousContentsWithPrefix(tmpDir,
"plugin-pointcuts.jar");
if (!lazyAdvisors.isEmpty()) {
File jarFile = new File(tmpDir, "plugin-pointcuts.jar");
ClassLoaders.defineClassesInBootstrapClassLoader(lazyAdvisors.values(),
instrumentation, jarFile);
}
}
this.pluginAdvisors = ImmutableList.copyOf(pluginAdvisors);
this.shimTypes = ImmutableList.copyOf(shimTypes);
this.mixinTypes = ImmutableList.copyOf(mixinTypes);
this.instrumentation = instrumentation;
this.tmpDir = tmpDir;
reweavableAdvisors =
createReweavableAdvisors(reweavableConfigs, instrumentation, tmpDir, true);
reweavableConfigVersions = createReweavableConfigVersions(reweavableConfigs);
allAdvisors = ImmutableList.copyOf(Iterables.concat(pluginAdvisors, reweavableAdvisors));
}
public Supplier> getAdvisorsSupplier() {
return new Supplier>() {
@Override
public List get() {
return allAdvisors;
}
};
}
@VisibleForTesting
public List getShimTypes() {
return shimTypes;
}
@VisibleForTesting
public List getMixinTypes() {
return mixinTypes;
}
public void initialReweave(Class[] initialLoadedClasses) {
Set pointcutClassNames = Sets.newHashSet();
for (Advice advice : allAdvisors) {
PointcutClassName pointcutClassName = getPointcutClassName(advice);
// don't add Runnable/Callable subclasses to initial reweave, since they won't work
// anyways since too late to add mixin interface
// this is just an optimization, and (importantly) to keep class retransformation down
// to a minimum since it has been known to have some problems on some JVMs
if (pointcutClassName != null
&& !advice.adviceType().getInternalName().startsWith(
"org/glowroot/agent/plugin/executor/ExecutorAspect$RunnableAdvice")
&& !advice.adviceType().getInternalName().startsWith(
"org/glowroot/agent/plugin/executor/ExecutorAspect$CallableAdvice")) {
pointcutClassNames.add(pointcutClassName);
}
}
LiveWeavingServiceImpl.initialReweave(pointcutClassNames, initialLoadedClasses,
checkNotNull(instrumentation));
}
public void updateAdvisors(List reweavableConfigs) throws Exception {
reweavableAdvisors =
createReweavableAdvisors(reweavableConfigs, instrumentation, tmpDir, false);
reweavableConfigVersions = createReweavableConfigVersions(reweavableConfigs);
allAdvisors = ImmutableList.copyOf(Iterables.concat(pluginAdvisors, reweavableAdvisors));
}
public boolean isOutOfSync(List reweavableConfigs) {
Set versions = Sets.newHashSet();
for (InstrumentationConfig reweavableConfig : reweavableConfigs) {
versions.add(Versions.getVersion(reweavableConfig.toProto()));
}
return !versions.equals(this.reweavableConfigVersions);
}
private static List getAdvisors(List adviceClasses) {
List advisors = Lists.newArrayList();
for (PointcutClass adviceClass : adviceClasses) {
try {
advisors.add(new AdviceBuilder(adviceClass).build());
} catch (Throwable t) {
logger.error("error creating advice: {}", adviceClass.type().getClassName(), t);
}
}
return advisors;
}
private static List getMixinTypes(List mixinClasses) throws IOException {
List mixinTypes = Lists.newArrayList();
for (MixinClass mixinClass : mixinClasses) {
mixinTypes.add(MixinType.create(mixinClass));
}
return mixinTypes;
}
private static List getShimTypes(List shimClasses)
throws ClassNotFoundException {
List shimTypes = Lists.newArrayList();
for (ShimClass shimClass : shimClasses) {
Class clazz = Class.forName(shimClass.type().getClassName(), false,
AdviceCache.class.getClassLoader());
Shim shim = clazz.getAnnotation(Shim.class);
if (shim != null) {
shimTypes.add(ShimType.create(shim, clazz));
}
}
return shimTypes;
}
private static ImmutableList createReweavableAdvisors(
List reweavableConfigs,
@Nullable Instrumentation instrumentation, File tmpDir, boolean cleanTmpDir)
throws Exception {
ImmutableMap advisors =
AdviceGenerator.createAdvisors(reweavableConfigs, null, true);
if (instrumentation == null) {
// instrumentation is null when debugging with LocalContainer
ClassLoader isolatedWeavingClassLoader =
Thread.currentThread().getContextClassLoader();
checkNotNull(isolatedWeavingClassLoader);
ClassLoaders.defineClasses(advisors.values(), isolatedWeavingClassLoader);
} else {
if (cleanTmpDir) {
ClassLoaders.createDirectoryOrCleanPreviousContentsWithPrefix(tmpDir,
"config-pointcuts");
}
if (!advisors.isEmpty()) {
String suffix = "";
int count = jarFileCounter.incrementAndGet();
if (count > 1) {
suffix = "-" + count;
}
File jarFile = new File(tmpDir, "config-pointcuts" + suffix + ".jar");
ClassLoaders.defineClassesInBootstrapClassLoader(advisors.values(), instrumentation,
jarFile);
}
}
return advisors.keySet().asList();
}
private static ImmutableSet createReweavableConfigVersions(
List reweavableConfigs) {
Set versions = Sets.newHashSet();
for (InstrumentationConfig reweavableConfig : reweavableConfigs) {
versions.add(Versions.getVersion(reweavableConfig.toProto()));
}
return ImmutableSet.copyOf(versions);
}
private static @Nullable PointcutClassName getPointcutClassName(Advice advice) {
PointcutClassName subTypeRestrictionPointcutClassName = null;
Pattern subTypeRestrictionPattern = advice.pointcutSubTypeRestrictionPattern();
if (subTypeRestrictionPattern != null) {
subTypeRestrictionPointcutClassName =
PointcutClassName.fromPattern(subTypeRestrictionPattern, null, false);
} else {
String subTypeRestriction = advice.pointcut().subTypeRestriction();
if (!subTypeRestriction.isEmpty()) {
subTypeRestrictionPointcutClassName =
PointcutClassName.fromNonPattern(subTypeRestriction, null, false);
}
}
Pattern classNamePattern = advice.pointcutClassNamePattern();
if (classNamePattern != null) {
return PointcutClassName.fromPattern(classNamePattern,
subTypeRestrictionPointcutClassName,
advice.pointcut().methodName().equals(""));
}
String className = advice.pointcut().className();
if (!className.isEmpty()) {
return PointcutClassName.fromNonPattern(className, subTypeRestrictionPointcutClassName,
advice.pointcut().methodName().equals(""));
}
return null;
}
// this method exists because tests cannot use (sometimes) shaded guava Supplier
@OnlyUsedByTests
public List getAdvisors() {
return getAdvisorsSupplier().get();
}
}
