• Daniel Kozak (24/24) Jan 21 2015 I am trying ldc on ARM. After few days I has been able to compile
• Kagamin (1/1) Jan 21 2015 It's a thread-local variable. See if it's IR fails.
• Kai Nacke (10/34) Jan 21 2015 The problem is in _d_dso_registry. One of the first statements in
• Joakim (6/30) Jan 21 2015 I ran into something like this too, when compiling unoptimized.

"Daniel Kozak" <kozzi11 gmail.com> writes:

I am trying ldc on ARM. After few days I has been able to compile 
it on tizen-common images on qemu (I have to make minor change in 
std.math).

But every app which I build with ldc segfaults. Even void 
main(){} segfaults.

Wierd is, that if I use -O (optimize) flag it works OK. I try GDB 
but it does not help at all.


exception.d:431

exception.d:600

_D2rt4util9container5array36__T5ArrayTPS2rt14sections_linux3DSOZ5Array5
mptyMxFNaNbNdNiNfZb 
(this=...)

sections_linux.d:311


envp=0x7ed7fbcc) at elf-init.c:88



this code _loadedDSOs.empty throw exception with message "null 
this"

So can you give me some advice how to properly debug

"Kagamin" <spam here.lot> writes:

It's a thread-local variable. See if it's IR fails.

"Kai Nacke" <kai redstar.de> writes:

On Wednesday, 21 January 2015 at 14:13:42 UTC, Daniel Kozak wrote:
 I am trying ldc on ARM. After few days I has been able to 
 compile it on tizen-common images on qemu (I have to make minor 
 change in std.math).

 But every app which I build with ldc segfaults. Even void 
 main(){} segfaults.

 Wierd is, that if I use -O (optimize) flag it works OK. I try 
 GDB but it does not help at all.


 exception.d:431

 exception.d:600

 _D2rt4util9container5array36__T5ArrayTPS2rt14sections_linux3DSOZ5Array5
mptyMxFNaNbNdNiNfZb 
 (this=...)

 sections_linux.d:311


 envp=0x7ed7fbcc) at elf-init.c:88



 this code _loadedDSOs.empty throw exception with message "null 
 this"

 So can you give me some advice how to properly debug

The problem is in _d_dso_registry. One of the first statements in 
the function is to call _loadedDSOs.empty. But _loadedDOSs is 
null (I do not understand why!) and the application crashes. This 
does not happen if you use -O1 or higher.

If you find the reason for this then please tell me. :-)

(This happens only on ARM. On x86/x86_64, PowerPC 32/64 bit and 
MIPS64 the code works as expected.)

Regards,
Kai

"Joakim" <dlang joakim.fea.st> writes:

On Wednesday, 21 January 2015 at 14:13:42 UTC, Daniel Kozak wrote:
 I am trying ldc on ARM. After few days I has been able to 
 compile it on tizen-common images on qemu (I have to make minor 
 change in std.math).

 But every app which I build with ldc segfaults. Even void 
 main(){} segfaults.

 Wierd is, that if I use -O (optimize) flag it works OK. I try 
 GDB but it does not help at all.


 exception.d:431

 exception.d:600

 _D2rt4util9container5array36__T5ArrayTPS2rt14sections_linux3DSOZ5Array5
mptyMxFNaNbNdNiNfZb 
 (this=...)

 sections_linux.d:311


 envp=0x7ed7fbcc) at elf-init.c:88



 this code _loadedDSOs.empty throw exception with message "null 
 this"

 So can you give me some advice how to properly debug

I ran into something like this too, when compiling unoptimized.  
When optimized, do all druntime and phobos tests pass for you 
though?  Because I could only get druntime to mostly pass on a 
Cubieboard2, most of phobos's tests would segfault, but that was 
a hard-float system.