Re: [Valgrind-users] Valgrind on Android Jelly Beans -- Can not launch app due to unrecognized instructions.

[John R. <jr...@Bi...>]

> I have 
> successfully built Valgrind as instructed in the README and pushed it into 
> my emulator. I used "android setprop wrap...." to redirect the app to be 
> launched through Valgrind, however, I am getting the following error for all 
> the apps launched by Valgrind:
> 
> ================from the logcat =================================
> I/val.sh  ( 1259): disInstr(thumb): unhandled instruction: 0xEEBA 0x7BEF
> I/val.sh  ( 1259): ==1260== valgrind: Unrecognised instruction at address 
> 0xcab86ad.
> I/val.sh  ( 1259): ==1260==    at 0xCAB86AC: ??? (in 
> /system/lib/libjavacore.so)

You forgot to say which version of valgrind (run "valgrind --version")
and which version of hardware (on Linux: "cat /proc/cpuinfo").

Assembling that unhandled Thumb-mode instruction 0xEEBA 0x7BEF:
----- foo.S
	.thumb_func
abc:
	.short 0xEEBA, 0x7BEF
-----
$ gcc -c foo.S
$ gdb foo.o
(gdb) x/i 1
   0x1 <abc+1>:	vcvt.f64.s32	d7, d7, #1
(gdb) x/x 0
0x0 <abc>:	0x7befeeba
-----

So does your hardware have vector floating point to execute 'vcvt.f64.s32' ?
The software believes (or was told) that the hardware does.  Is it true?
Check the configuration steps.  Look for a file "config.h", and see if
its contents describe your setup accurately.

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