Building on android - compiled program segfaults
nathan.huesken at posteo.de
Fri Jan 11 14:47:50 CET 2013
I just find out how to get in usefull backtrace with android ndk
(unfortantly I am also new to the ndk).
Now I get:
Program received signal SIGSEGV, Segmentation fault.
0x003f05a8 in stg_returnToStackTop ()
#0 0x003f05a8 in stg_returnToStackTop ()
#1 0x003c2e74 in schedule (initialCapability=0x3f059c, task=0x530350)
#2 0x003c2e74 in schedule (initialCapability=0x530340, task=0x400a42f0)
#3 0x003c4c50 in scheduleWaitThread (tso=0x401033c0, ret=0x0,
#4 0x00408544 in rts_evalLazyIO (cap=0xbe89ab6c, p=0x50a020, ret=0x0)
#5 0x003c08c8 in real_main () at rts/RtsMain.c:68
#6 0x003c0a54 in hs_main (argc=1, argv=0xbe89abf4, main_closure=0x50a020,
rts_config=...) at rts/RtsMain.c:123
#7 0x0000a23c in main ()
stg_returnToStackTop is defined in rts/StgStartup.cmm (a c-- file).
I would guess that
jump %ENTRY_CODE(Sp(0)) ;
could be the problem. Since p8 $r13 gives me
Sp(0) would be 0x0, correct?
On 01/11/2013 02:16 PM, Simon Marlow wrote:
> On 11/01/13 11:36, Nathan Hüsken wrote:
>> I was succesfull in building ghc (pulled from git) to compile for
>> Now using "inplace/bin/ghc-stage1 -dcore-lint -debug" I compiler this
>> main = putStrLn "Hello, World"
>> I get an executable, which I can run on my android device. Unfortantly
>> it segfaults.
>> Running it with ./Main +RTS -DS gives:
>> cap 0: initialised
>> Now I am trying to debug this in gdb. When I try to display the stack
>> (which should be in r13 on arm of I understand correctly, I get);
> First establish whether the crash is in C or Haskell: what does 'bt'
> tell you in gdb?
>> (gdb) p8 $r13
>> 0xbef00a74: 0x0
>> 0xbef00a70: 0x0
>> 0xbef00a6c: 0x3c2e74
>> 0xbef00a68: 0x530350
>> 0xbef00a64: 0x0
>> 0xbef00a60: 0x0
>> 0xbef00a5c: 0x0
>> 0xbef00a58: 0x0
>> And now I am clueless. So I tried the good old printf debugging in the
>> rts. Using this, I see that it gets before the call to
>> scheduleWaitThread in the function rts_evalLazyIO (in RtsAPI.c).
>> But when I put a printf in the beginning of scheduleWaitThread (in
>> Schedule.c) it is not shown.
>> What else can I do to find out more?
>> ghc-devs mailing list
>> ghc-devs at haskell.org
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