28 lines
1.1 KiB
Markdown
28 lines
1.1 KiB
Markdown
# dumpjvmti
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dumpjvmti is a JVMTI agent designed for helping debug the working of the openjdkjvmti plugin. It
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allows one to use SIGQUIT to dump information about the current JVMTI state to logcat. It does
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this by calling the com.android.art.misc.get_plugin_internal_state extension function.
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# Usage
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### Build
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> `m libdumpjvmti`
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The libraries will be built for 32-bit, 64-bit, host and target. Below examples
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assume you want to use the 64-bit version.
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#### ART
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> `art -Xplugin:$ANDROID_HOST_OUT/lib64/libopenjdkjvmti.so '-agentpath:libdumpjvmti.so' -cp tmp/java/helloworld.dex -Xint helloworld`
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> `kill -3 <pid>`
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* `-Xplugin` and `-agentpath` need to be used, otherwise the agent will fail during init.
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* If using `libartd.so`, make sure to use the debug version of jvmti.
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> `adb shell setenforce 0`
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>
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> `adb push $ANDROID_PRODUCT_OUT/system/lib64/libdumpjvmti.so /data/local/tmp/`
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>
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> `adb shell am start-activity --attach-agent /data/local/tmp/libdumpjvmti.so some.debuggable.apps/.the.app.MainActivity`
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>
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> `adb shell kill -3 $(adb shell pidof some.debuggable.apps)`
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