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What is Dalvik Virtual Machine?

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What is Dalvik Virtual Machine?
posted Apr 17, 2017 by Karthick.c

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1 Answer

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Every Android application runs in its own process, with its own instance of the Dalvik virtual machine. Dalvik has been written so that a device can run multiple VMs efficiently. The Dalvik VM executes files in the Dalvik Executable (.dex) format which is optimised for minimal memory footprint.

answer May 26, 2017 by Shyam
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0 votes

I was experimenting something with Android native code and it needs to access a file in dalvik/vm folder from a .cpp file in frameworks/base/core/jni ... I would like to know if this is even possible through #include or some other technique. I think #include may not be the right way to do it and wold like to know if my purpose can be somehow achieved.

0 votes

I tried to run Dalvik in portable mode by setting /data/local.prop as follows:

dalvik.vm.execution-mode = int:portable

But after I reboot the device (which is a Nexus 7), app_process (hosting zygote) still starts in jit mode.

However, if I run:

adb shell stop
adb shell setprop dalvik.vm.execution-mode int:portable
adb shell start

Then app_process will run in portable mode. Is /data/local.prop deprecated or something is missing here?

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