The app can not start up if its decompiled jar is instrumented by jacoco while working well by ASM

Tool Ply

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Jan 29, 2018, 8:14:28 AM1/29/18

to JaCoCo and EclEmma Users

Just like the title.

I decompiled the apk and use ASM and Jacoco to instrument it jar separately. The result shows that ASM work well. However, the apk instrumented by Jacoco could not start up and I did not find any .exec files by command `find . -name jacoco`

In order to verificate if it was caused by file read and write errors, I have tried to config 'output=none' in jacoco-agent.properties in the Dalvik and added the path to classpath. It does not work.

How to fix it?

Marc Hoffmann

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Jan 29, 2018, 11:51:34 AM1/29/18

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> the apk instrumented by Jacoco could not start up

Is there any error message?

Regards,
-marc

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Tool Ply

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Jan 30, 2018, 4:18:57 AM1/30/18

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Yes, as the following:

Ply Truth, [30.01.18 17:11]

01-30 01:07:48.058 1360 1650 D EGL_emulation: eglMakeCurrent: 0x8d8bf4c0: ver 2 0 (tinfo 0x8d8b7ac0)

01-30 01:07:48.344 2831 2831 D AndroidRuntime: Shutting down VM

01-30 01:07:48.355 2831 2831 E AndroidRuntime: FATAL EXCEPTION: main

01-30 01:07:48.355 2831 2831 E AndroidRuntime: Process: com.tsinghua.date.sample, PID: 2831

01-30 01:07:48.355 2831 2831 E AndroidRuntime: java.lang.NoClassDefFoundError: Failed resolution of: Lorg/jacoco/agent/rt/internal_290345e/Offline;

01-30 01:07:48.355 2831 2831 E AndroidRuntime: at com.tsinghua.date.sample.SettingsActivity.$jacocoInit(Unknown Source:13)

01-30 01:07:48.355 2831 2831 E AndroidRuntime: at com.tsinghua.date.sample.SettingsActivity.<clinit😠Unknown Source:0)

01-30 01:07:48.355 2831 2831 E AndroidRuntime: at java.lang.Class.newInstance(Native Method)

01-30 01:07:48.355 2831 2831 E AndroidRuntime: at android.app.Instrumentation.newActivity(Instrumentation.java:1174)

01-30 01:07:48.355 2831 2831 E AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2669)

01-30 01:07:48.355 2831 2831 E AndroidRuntime: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)

01-30 01:07:48.355 2831 2831 E AndroidRuntime: at android.app.ActivityThread.access$1300(ActivityThread.java:176)

01-30 01:07:48.355 2831 2831 E AndroidRuntime: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)

01-30 01:07:48.355 2831 2831 E AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:106)

01-30 01:07:48.355 2831 2831 E AndroidRuntime: at android.os.Looper.loop(Looper.java:164)

01-30 01:07:48.355 2831 2831 E AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:6494)

01-30 01:07:48.355 2831 2831 E AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method)

01-30 01:07:48.355 2831 2831 E AndroidRuntime: at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)

01-30 01:07:48.355 2831 2831 E AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:816)

01-30 01:07:48.355 2831 2831 E AndroidRuntime: Caused by: java.lang.ClassNotFoundException: Didn't find class "org.jacoco.agent.rt.internal_290345e.Offline" on path: DexPathList[[zip file "/data/app/com.tsinghua.date.sample-O4Rk5hb51sr4_D96mT2MnQ==/base.apk"],nativeLibraryDirectories=[/data/app/com.tsinghua.date.sample-O4Rk5hb51sr4_D96mT2MnQ==/lib/arm, /system/lib, /vendor/lib]]

01-30 01:07:48.355 2831 2831 E AndroidRuntime: at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:125)

01-30 01:07:48.355 2831 2831 E AndroidRuntime: at java.lang.ClassLoader.loadClass(ClassLoader.java:379)

01-30 01:07:48.355 2831 2831 E AndroidRuntime: at java.lang.ClassLoader.loadClass(ClassLoader.java:312)

01-30 01:07:48.355 2831 2831 E AndroidRuntime: ... 14 more

01-30 01:07:48.382 1180 1674 W ActivityManager: Force finishing activity com.tsinghua.date.sample/.SettingsActivity

2018-01-30 0:51 GMT+08:00 Marc Hoffmann <hoff...@mountainminds.com>:

> the apk instrumented by Jacoco could not start up

Is there any error message?

Regards,
-marc

On 2018-01-29 14:14, Tool Ply wrote:

Just like the title.

I decompiled the apk and use ASM and Jacoco to instrument it jar separately. The result shows that ASM work well. However, the apk instrumented by Jacoco could not start up and I did not find any .exec files by command `find . -name jacoco`

In order to verificate if it was caused by file read and write errors, I have tried to config 'output=none' in jacoco-agent.properties in the Dalvik and added the path to classpath. It does not work.

How to fix it?

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Tool Ply

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Jan 30, 2018, 4:59:12 AM1/30/18

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I tried the Missing Jacoco Components Jar in this questions java.lang.NoClassDefFoundError: Failed resolution of: Lorg/jacoco/agent/rt/internal_14f7ee5/Offline

The classpath in android is:

/sdcard/app_test/:/sdcard/app_test/lib/org.jacoco.report-0.8.0.jar:/sdcard/app_test/lib/org.jacoco.report-0.8.0.201801022044.jar:/sdcard/app_test/lib/org.jacoco.core-0.8.0.jar:/sdcard/app_test/lib/org.jacoco.core-0.8.0.201801022044.jar:/sdcard/app_test/lib/org.jacoco.cli-0.8.0-nodeps.jar:/sdcard/app_test/lib/org.jacoco.ant-0.8.0.jar:/sdcard/app_test/lib/org.jacoco.ant-0.8.0.201801022044.jar:/sdcard/app_test/lib/org.jacoco.ant-0.8.0-nodeps.jar:/sdcard/app_test/lib/org.jacoco.agent-0.8.0.jar:/sdcard/app_test/lib/org.jacoco.agent-0.8.0.201801022044.jar:/sdcard/app_test/lib/org.jacoco.agent-0.8.0-runtime.jar:/sdcard/app_test/lib/junit-4.12.jar:/sdcard/app_test/lib/jacococli.jar:/sdcard/app_test/lib/jacocoant.jar:/sdcard/app_test/lib/jacocoagent.jar:/sdcard/app_test/lib/hamcrest-core-1.3.jar:/sdcard/app_test/lib/asm-5.2.jar:/sdcard/app_test/lib/args4j-2.0.28.jar:/sdcard/app_test/lib/android-jacoco-the-missing.jar:

it doesn't work👽

2018-01-30 0:51 GMT+08:00 Marc Hoffmann <hoff...@mountainminds.com>:

> the apk instrumented by Jacoco could not start up

Is there any error message?

Regards,
-marc

On 2018-01-29 14:14, Tool Ply wrote:

Just like the title.

I decompiled the apk and use ASM and Jacoco to instrument it jar separately. The result shows that ASM work well. However, the apk instrumented by Jacoco could not start up and I did not find any .exec files by command `find . -name jacoco`

In order to verificate if it was caused by file read and write errors, I have tried to config 'output=none' in jacoco-agent.properties in the Dalvik and added the path to classpath. It does not work.

How to fix it?

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Marc Hoffmann

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Jan 30, 2018, 3:26:43 PM1/30/18

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Hi,

the problem is here that the correct JaCoCo runtime (provided by jacocoagent.jar) cannot be found:

01-30 01:07:48.355 2831 2831 E AndroidRuntime: Caused by: java.lang.ClassNotFoundException: Didn't find class "org.jacoco.agent.rt.internal_290345e.Offline" on path: DexPathList[[zip file "/data/app/com.tsinghua.date.sample-O4Rk5hb51sr4_D96mT2MnQ==/base.apk"],nativeLibraryDirectories=[/data/app/com.tsinghua.date.sample-O4Rk5hb51sr4_D96mT2MnQ==/lib/arm, /system/lib, /vendor/lib]]

Please include jacocoagent.jar in you application class path.

Important: The jacocoagent.jar file must be from the exact same release than the JaCoCo version used for offline instrumentation. In your case 0.8.0.

Regards,
-marc

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Evgeny Mandrikov

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Jan 30, 2018, 5:16:57 PM1/30/18

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On Tuesday, January 30, 2018 at 10:59:12 AM UTC+1, Tool Ply wrote:

I tried the Missing Jacoco Components Jar in this questions java.lang.NoClassDefFoundError: Failed resolution of: Lorg/jacoco/agent/rt/internal_14f7ee5/Offline

As Marc said : you should not use some random JAR from internet, but jacocoagent.jar that is part of JaCoCo distribution ( http://www.jacoco.org/jacoco/ ) of a version that you use for offline instrumentation. In your case this is 0.8.0, so you'll find jacocoagent.jar in folder "lib" of http://search.maven.org/remotecontent?filepath=org/jacoco/jacoco/0.8.0/jacoco-0.8.0.zip

Alternatively exactly the same JAR can be obtained from Maven Central repository - as described on page http://www.jacoco.org/jacoco/trunk/doc/repo.html it has groupId "org.jacoco" artifactId "org.jacoco.agent" classifier "runtime" and version 0.8.0, so http://repo1.maven.org/maven2/org/jacoco/org.jacoco.agent/0.8.0/org.jacoco.agent-0.8.0-runtime.jar

Of course placing it in classpath won't be enough - it should be loadable by Android VM as like instrumented application, so should be translated to Dalvik bytecode.

Tool Ply

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Jan 31, 2018, 11:27:06 PM1/31/18

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Thanks, Marc and Evgeny.

In fact, I have tried what Evgeny said before asking this question, however, it did not work. According to what both you said, I tried it as following steps.

My experiment is based on an emulator with API Level 24, these are the details

and the error in the emulator is changed to

02-01 03:35:45.421 1934 1934 E AndroidRuntime: FATAL EXCEPTION: main

02-01 03:35:45.421 1934 1934 E AndroidRuntime: Process: com.tsinghua.date.sample, PID: 1934

02-01 03:35:45.421 1934 1934 E AndroidRuntime: java.lang.NoClassDefFoundError: Failed resolution of: Lorg/jacoco/agent/rt/internal_290345e/Offline;

02-01 03:35:45.421 1934 1934 E AndroidRuntime: at com.tsinghua.date.sample.SettingsActivity.$jacocoInit(Unknown Source)

02-01 03:35:45.421 1934 1934 E AndroidRuntime: at com.tsinghua.date.sample.SettingsActivity.<clinit>(Unknown Source)

02-01 03:35:45.421 1934 1934 E AndroidRuntime: at java.lang.Class.newInstance(Native Method)

02-01 03:35:45.421 1934 1934 E AndroidRuntime: at android.app.Instrumentation.newActivity(Instrumentation.java:1078)

02-01 03:35:45.421 1934 1934 E AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2538)

02-01 03:35:45.421 1934 1934 E AndroidRuntime: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707)

02-01 03:35:45.421 1934 1934 E AndroidRuntime: at android.app.ActivityThread.-wrap12(ActivityThread.java)

02-01 03:35:45.421 1934 1934 E AndroidRuntime: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)

02-01 03:35:45.421 1934 1934 E AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:102)

02-01 03:35:45.421 1934 1934 E AndroidRuntime: at android.os.Looper.loop(Looper.java:154)

02-01 03:35:45.421 1934 1934 E AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:6077)

02-01 03:35:45.421 1934 1934 E AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method)

02-01 03:35:45.421 1934 1934 E AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)

02-01 03:35:45.421 1934 1934 E AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)

02-01 03:35:45.421 1934 1934 E AndroidRuntime: Caused by: java.lang.ClassNotFoundException: Didn't find class "org.jacoco.agent.rt.internal_290345e.Offline" on path: DexPathList[[zip file "/data/app/com.tsinghua.date.sample-1/base.apk"],nativeLibraryDirectories=[/data/app/com.tsinghua.date.sample-1/lib/arm, /system/lib, /vendor/lib]]

02-01 03:35:45.421 1934 1934 E AndroidRuntime: at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)

02-01 03:35:45.421 1934 1934 E AndroidRuntime: at java.lang.ClassLoader.loadClass(ClassLoader.java:380)

02-01 03:35:45.421 1934 1934 E AndroidRuntime: at java.lang.ClassLoader.loadClass(ClassLoader.java:312)

02-01 03:35:45.421 1934 1934 E AndroidRuntime: ... 14 more

02-01 03:35:45.518 938 1487 W ActivityManager: Force finishing activity com.tsinghua.date.sample/.SettingsActivity

What I did:

Step 1: I parse the jacoco-0.8.0/lib/jacocoagent.jar to Dalvik class. by using $ANDROID_SDK_PATH/build-tools/24.0.3/dx.

Step 2: adb start, to get root

Step 3: push the parsed jacocoagent.jar to /data/app/com.tsinghua.date.sample-1/lib/arm/

Step 4: add the jacocoagent.jar to CLASSPATH, export CLASSPATH=/data/app/com.tsinghua.date.sample-1/lib/arm/jacocoagent.jar:$CLASSPATH

and the CLASSPATH was indeed changed successfully.

Step 5: restart the app, and the error was still there, I was confused.

PS:

PS 1: My little app, sample, was indeed instrumented with jacoco-0.8.0, as the maven config shows.

PS 2: to confirm whether it is because of the differences between jacocoagent.jar from jacoco-0.8.0.zip and the jar from maven, I have tried to replace the jacoco-0.8.0.jar in Step 1 and Step 3 with org.jacoco.agent-0.8.0-runtime.jar which is from maven, .m2/library/... and also contain org.jacoco.agent.rt.internal_290345e.Offline

PS 3: In Step 4, I have alse tried to remount /system and /vendor, and push the jar into /vendor/lib/, it also did't work.

I was fully confused.....please save me🤕

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