On Tuesday, 11 June 2013 at 12:40:23 UTC, Andrei Alexandrescu
wrote:
Well Jerry can help. Jerry? Nazriel, if you want me to attach
the binary I produced, sure, I can do that. But that works...
Andrei
Thanks to your authority, your posts are more visible than mine
that's why I asked for help :PPP
On Tuesday, 11 June 2013 at 13:32:51 UTC, Jerry wrote:
"nazriel" <s...@dzfl.pl> writes:
Sorry about that. I was hesitant to post a binary to a
newsgroup.
http://d.puremagic.com/issues/attachment.cgi?id=1224
Thanks for looking,
Jerry
Thanks a lot!
Few things I gathered so far:
It isn't your setup/system/hardware problem when launching
application. It does also segfault on my system. So for some
reason DMD or/and linker produce broken executable on your system.
I created same hello world with same DMD revision and segfault
doesn't occur when I launch created binary on my machine.
From fast debugging and reversing looks like segfault occurs in
_d_dso_registry. We may want to ping Martin Nowak with that
because it seems to be related to shared libraries which is his
baby.
Segfault occurs exactly at this instruction:
=> 0x00000000004187b0 <+512>: mov QWORD PTR [rax-0x8],r14
I created an breakpoint at 1 instruction before the one mentioned
above.
Reg info:
Breakpoint 1, 0x00000000004187ac in _d_dso_registry ()
(gdb) info reg
rax 0x43d0a0 4444320
rbx 0x1 1
rcx 0x10043d0a0 4299411616
rdx 0x43d0a0 4444320
rsi 0x0 0
rdi 0x4 4
rbp 0x7fffffffe8d0 0x7fffffffe8d0
rsp 0x7fffffffe810 0x7fffffffe810
r8 0x3 3
r9 0x7fffffffe760 140737488349024
r10 0x7fffffffe5a0 140737488348576
r11 0x7ffff7686320 140737344201504
r12 0x400270 4194928
r13 0x43d050 4444240
r14 0x43d010 4444176
r15 0x1 1
rip 0x4187ac 0x4187ac <_d_dso_registry+508>
eflags 0x206 [ PF IF ]
cs 0x33 51
ss 0x2b 43
ds 0x0 0
es 0x0 0
fs 0x0 0
gs 0x0 0
I can't find address pointed by RAX+SIB in IDA listing unless I
am missing something.
I compared assembly created by my working binary and your's and
there few interesting things:
Working binary:
mov rbx,QWORD PTR [rip+0x247b30] # 0x680808
<_D2rt14sections_linux12_static_dsosS2rt4util9container36__T5ArrayTPS2rt14sections_linux3DSOZ5Array+8>
Borked one:
mov rbx,QWORD PTR [rip+0x2359c] # 0x43bd24
<_D2rt14sections_linux12_static_dsosS2rt4util9container36__T5ArrayTPS2rt14sections_linux3DSOZ5Array+4>
See the 4 vs 8 offset
