Hi Michael,

Nice to see you here :-)

I am CCing squeak-dev because there is likely to be interest there, and some
historical expertise also.

Yes, vm-dev is a good place for follow ups.

Dave


On Sat, Jun 17, 2017 at 07:48:31AM +1200, Michael Rueger wrote:
> 
> 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 is a very outdated version.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?
> 
> --------
> 
> 
> list of sources I looked at:
> 
> -opensmalltalk
> -pharo
> 
> -original port by Andreas
> git at 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-readonly/
> 
> 
> 
> -------------
> 
> 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)
>