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EA Agent Loader is a collection of utilities for java agent developers.

License: Other

Java 100.00%

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ea-agent-loader's Issues

Checking for a Sun VM when DCEVM is used.

I use DCEVM for hot reloading : https://github.com/dcevm/dcevm
When trying to also use ea-agent-loader, I get an error because String jvm = System.getProperty("java.vm.name").toLowerCase(Locale.ENGLISH); is equals to "dynamic code evolution 64-bit server vm"! It doesn't contain "hotspot" or "openjdk".

If I patch the com.ea.agentloader.AgentLoaderHotSpot class to accept this String as a valid Sun VM, everything works fine.

I'm not sure what would be the best way to fix this.

don't work with spring fat jar

spring-projects/spring-boot#4868
Agent class inside fat jar loaded by LaunchedURLClassLoader invisible to SysClassLoader,fire ClassNotFoundException when call sun.instrument.InstrumentationImpl.loadClassAndCallAgentmain

JDK9 is not supported

Hi,

An exception is thrown when loading any agent with the JDK9

Sample of code to reproduce the behavior:

public class AgentTest {
  static class DummyAgent {
    public static void agentmain(String agentArgs, Instrumentation inst) {
    }
  }

  @Test
  void testAgent() throws Exception {
    AgentLoader.loadAgentClass(DummyAgent.class.getName(), "");
  }
}

Stacktrace of thrown exception:

java.lang.RuntimeException: java.lang.reflect.InvocationTargetException

	at com.ea.agentloader.AgentLoader$1.loadAgent(AgentLoader.java:244)
	at com.ea.agentloader.AgentLoader.loadAgent(AgentLoader.java:77)
	at com.ea.agentloader.AgentLoader.loadAgentClass(AgentLoader.java:148)
	at com.ea.agentloader.AgentLoader.loadAgentClass(AgentLoader.java:102)
	at fr.pturpin.lambdaString.AgentTest.testAgent(AgentTest.java:17)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:564)
	at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:389)
	at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:115)
	at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$6(TestMethodTestDescriptor.java:167)
	at org.junit.jupiter.engine.execution.ThrowableCollector.execute(ThrowableCollector.java:40)
	at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:163)
	at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:110)
	at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:57)
	at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.lambda$execute$3(HierarchicalTestExecutor.java:83)
	at org.junit.platform.engine.support.hierarchical.SingleTestExecutor.executeSafely(SingleTestExecutor.java:66)
	at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:77)
	at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.lambda$null$2(HierarchicalTestExecutor.java:92)
	at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184)
	at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177)
	at java.base/java.util.Iterator.forEachRemaining(Iterator.java:133)
	at java.base/java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
	at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
	at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:430)
	at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.lambda$execute$3(HierarchicalTestExecutor.java:92)
	at org.junit.platform.engine.support.hierarchical.SingleTestExecutor.executeSafely(SingleTestExecutor.java:66)
	at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:77)
	at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.lambda$null$2(HierarchicalTestExecutor.java:92)
	at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184)
	at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177)
	at java.base/java.util.Iterator.forEachRemaining(Iterator.java:133)
	at java.base/java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
	at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
	at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:430)
	at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.lambda$execute$3(HierarchicalTestExecutor.java:92)
	at org.junit.platform.engine.support.hierarchical.SingleTestExecutor.executeSafely(SingleTestExecutor.java:66)
	at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:77)
	at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:51)
	at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:43)
	at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:170)
	at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:154)
	at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:90)
	at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:74)
	at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
	at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
	at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Caused by: java.lang.reflect.InvocationTargetException
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:564)
	at com.ea.agentloader.AgentLoader$1.loadAgent(AgentLoader.java:240)
	... 55 more
Caused by: java.lang.RuntimeException: java.io.IOException: Can not attach to current VM
	at com.ea.agentloader.AgentLoaderHotSpot.getVirtualMachine(AgentLoaderHotSpot.java:90)
	at com.ea.agentloader.AgentLoaderHotSpot.loadAgent(AgentLoaderHotSpot.java:56)
	... 60 more
Caused by: java.io.IOException: Can not attach to current VM
	at jdk.attach/sun.tools.attach.HotSpotVirtualMachine.<init>(HotSpotVirtualMachine.java:75)
	at jdk.attach/sun.tools.attach.VirtualMachineImpl.<init>(VirtualMachineImpl.java:48)
	at jdk.attach/sun.tools.attach.AttachProviderImpl.attachVirtualMachine(AttachProviderImpl.java:69)
	at jdk.attach/com.sun.tools.attach.VirtualMachine.attach(VirtualMachine.java:207)
	at com.ea.agentloader.AgentLoaderHotSpot.getVirtualMachine(AgentLoaderHotSpot.java:86)
	... 61 more

Output of java --version:

java 9.0.4
Java(TM) SE Runtime Environment (build 9.0.4+11)
Java HotSpot(TM) 64-Bit Server VM (build 9.0.4+11, mixed mode)

java 1.7 supports

hi why this project not supports java 1.7?

Does not work with aspectjweaver

Do I have to handle somehow specially AspectJ?
I tried to execute as first call in the main method, without any success:

` AgentLoader.loadAgentClass(Agent.class.getName(), null);

where Agent.class is "import org.aspectj.weaver.loadtime.Agent";

My aspect is only getting executed after I add to jvm start:

-javaagent:${env_var:HOME}/.m2/repository/org/aspectj/aspectjweaver/1.8.13/aspectjweaver-1.8.13.jar

Any advice or even better a solution?

Can I unload javaagent in the runtime?

Hi! This agent-loader is wonderful, I use it a lot to test my javaagent.
However, my agent needs to input some params, when I run different test cases, the params might be different. Is there any method to unload / reload the agent? So that I can design my testcases more conveniently.
Thanks!

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