1*795d594fSAndroid Build Coastguard Worker# dumpjvmti 2*795d594fSAndroid Build Coastguard Worker 3*795d594fSAndroid Build Coastguard Workerdumpjvmti is a JVMTI agent designed for helping debug the working of the openjdkjvmti plugin. It 4*795d594fSAndroid Build Coastguard Workerallows one to use SIGQUIT to dump information about the current JVMTI state to logcat. It does 5*795d594fSAndroid Build Coastguard Workerthis by calling the com.android.art.misc.get_plugin_internal_state extension function. 6*795d594fSAndroid Build Coastguard Worker 7*795d594fSAndroid Build Coastguard Worker# Usage 8*795d594fSAndroid Build Coastguard Worker### Build 9*795d594fSAndroid Build Coastguard Worker> `m libdumpjvmti` 10*795d594fSAndroid Build Coastguard Worker 11*795d594fSAndroid Build Coastguard WorkerThe libraries will be built for 32-bit, 64-bit, host and target. Below examples 12*795d594fSAndroid Build Coastguard Workerassume you want to use the 64-bit version. 13*795d594fSAndroid Build Coastguard Worker 14*795d594fSAndroid Build Coastguard Worker#### ART 15*795d594fSAndroid Build Coastguard Worker> `art -Xplugin:$ANDROID_HOST_OUT/lib64/libopenjdkjvmti.so '-agentpath:libdumpjvmti.so' -cp tmp/java/helloworld.dex -Xint helloworld` 16*795d594fSAndroid Build Coastguard Worker> `kill -3 <pid>` 17*795d594fSAndroid Build Coastguard Worker 18*795d594fSAndroid Build Coastguard Worker* `-Xplugin` and `-agentpath` need to be used, otherwise the agent will fail during init. 19*795d594fSAndroid Build Coastguard Worker* If using `libartd.so`, make sure to use the debug version of jvmti. 20*795d594fSAndroid Build Coastguard Worker 21*795d594fSAndroid Build Coastguard Worker> `adb shell setenforce 0` 22*795d594fSAndroid Build Coastguard Worker> 23*795d594fSAndroid Build Coastguard Worker> `adb push $ANDROID_PRODUCT_OUT/system/lib64/libdumpjvmti.so /data/local/tmp/` 24*795d594fSAndroid Build Coastguard Worker> 25*795d594fSAndroid Build Coastguard Worker> `adb shell am start-activity --attach-agent /data/local/tmp/libdumpjvmti.so some.debuggable.apps/.the.app.MainActivity` 26*795d594fSAndroid Build Coastguard Worker> 27*795d594fSAndroid Build Coastguard Worker> `adb shell kill -3 $(adb shell pidof some.debuggable.apps)` 28