Hi all,
long time no see :-)
Recently I spent a bit of time trying to piece together an Android VM using the up to date versions of AndroidStudio, SDK and NDK. Once things are building and running, I was planning to fold everything back into the proper build process.
Current (somewhat messy) state of things here https://github.com/mrueger42/st-android
It has been quite a long time since I looked at building VMs, so forgive me if I'm just being stupid here...
I was able to get the original port from Andreas to build and run, but it is a very outdated version. Still nice to have it as a piece of history, I think (AndroidVM in the above repo).
Some puzzle pieces later I have something running that is based on recent CogSpur opensmalltalk code and bits and pieces I found. Unfortunately CogSpur doesn't seem to play well with the setjmp/longjmp used in the code (CogDroid in the above repo).
Plus, the VM is running on the UI thread, not something that is viewed well on mobile. Actually it makes Android just kill the app if you block the UI thread for too long.
Trying to run the VM on a thread runs into a division by 0 exception (I think) and finds me way out of my league to track down why that would be. Crash below...
I haven't really tried getting Dmitry's version to build/work in a current environment, partly because I'm not sure I'm looking at the most up to date version (see below).
Any help, pointers, code snippets highly appreciated!
Cheers
Michael
P.S. Sending this to vm-dev and pharo-dev, but should probably send any followup to vm-dev?
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list of sources I looked at:
-opensmalltalk -pharo
-original port by Andreas git@github.com:timfel/squeak-android-vm.git
-stack https://github.com/sbragagnolo/pharo-vm/
-dmitry gitorious is no longer, just an archival snapshot clicking on snapshot gives you the sources https://gitorious.org/cogvm/dmg-blessed?p=cogvm:dmg-blessed.git;a=summary non-functional jenkins setup https://ci.inria.fr/pharo-contribution/view/VM/job/CogDroid/configure-readon...
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The Cog VM crash when running on a Thread:
D/jni-vm: Java_org_smalltalk_android_vm_VM_runVM D/jni-vm: runVM D/jni-vm: interpret
A/libc: Fatal signal 8 (SIGFPE), code -6, fault addr 0x67db in tid 26636 (Thread-5)
Revision: '6' ABI: 'arm' pid: 26587, tid: 26636, name: Thread-5 >>> org.smalltalk.android <<< signal 8 (SIGFPE), code -6 (SI_TKILL), fault addr 0x67db r0 00000000 r1 0000680c r2 00000008 r3 00000000 r4 e4f7f978 r5 00000008 r6 e4f7f920 r7 0000010c r8 e4f7ef60 r9 e3516400 sl e351648c fp e4f7ecb4 ip 00000002 sp e4f7ce30 lr efca84c7 pc efcaad30 cpsr 600e0010
backtrace: #00 pc 0004ad30 /system/lib/libc.so (tgkill+12) #01 pc 000484c3 /system/lib/libc.so (pthread_kill+34) #02 pc 0001dd99 /system/lib/libc.so (raise+10) #03 pc 000c54a3 /data/app/org.smalltalk.android-2/lib/arm/libStackVM.so #04 pc 00051507 /data/app/org.smalltalk.android-2/lib/arm/libStackVM.so #05 pc 0003d38b /data/app/org.smalltalk.android-2/lib/arm/libStackVM.so (interpret+238) #06 pc 000a4e6f /data/app/org.smalltalk.android-2/lib/arm/libStackVM.so (runVM+22) #07 pc 000a4a55 /data/app/org.smalltalk.android-2/lib/arm/libStackVM.so (Java_org_smalltalk_android_vm_VM_runVM+36) #08 pc 0031ec99 /data/app/org.smalltalk.android-2/oat/arm/base.odex (offset 0x302000)