amd64/182843: application crashes when compiled with clang 3.3

[alex at ahhyes.net]

The following reply was made to PR amd64/182843; it has been noted by GNATS.

From: alex at ahhyes.net
To: <bug-followup at FreeBSD.org>
Cc:  
Subject: Re: amd64/182843: application crashes when compiled with clang 3.3
Date: Wed, 09 Oct 2013 12:24:26 +1100

 Have run the program in gdb with debugging symbols:
 
 ---------------
 
 Program received signal SIGILL, Illegal instruction.
 [Switching to Thread 804407400 (LWP 100136/jabberd14)]
 0x0000000804a3ef6d in mod_privacy_end_session (m=0x8047b0e68, arg=0x0) 
 at mod_privacy.cc:1522
 1522        mod_privacy_free_current_list_definitions(m->s);
 
 
 ---------- bt --------------
 (gdb) bt
 #0  0x0000000804a3ef6d in mod_privacy_end_session (m=0x8047b0e68, 
 arg=0x0) at mod_privacy.cc:1522
 #1  0x0000000804a29ae3 in js_mapi_call2 (si=0x8044dd480, e=2, 
 packet=0x0, user=0x8047f2140, s=0x8045c3800, serialization_node=0x0) at 
 modules.cc:226
 #2  0x0000000804a2995d in js_mapi_call (si=0x0, e=2, packet=0x0, 
 user=0x8047f2140, s=0x8045c3800) at modules.cc:177
 #3  0x0000000804a2b28c in _js_session_end (arg=0x8045c3800) at 
 sessions.cc:625
 #4  0x0000000800874dc5 in mtq_main (arg=0x80451b9a0) at mtq.cc:208
 #5  0x0000000802a502fb in pth_spawn_trampoline () from 
 /usr/local/lib/pth/libpth.so.20
 #6  0x0000000803d91e49 in makecontext () from /lib/libc.so.7
 
 ----------- bt full --------------
 (gdb) bt full
 #0  0x0000000804a3ef6d in mod_privacy_end_session (m=0x8047b0e68, 
 arg=0x0) at mod_privacy.cc:1522
 No locals.
 #1  0x0000000804a29ae3 in js_mapi_call2 (si=0x8044dd480, e=2, 
 packet=0x0, user=0x8047f2140, s=0x8045c3800, serialization_node=0x0) at 
 modules.cc:226
          l = 0x8045c3cb8
          m = {si = 0x8044dd480, packet = 0x0, e = 2, user = 0x8047f2140, 
 s = 0x8045c3800, serialization_node = 0x0, additional_result = 0x0}
 #2  0x0000000804a2995d in js_mapi_call (si=0x0, e=2, packet=0x0, 
 user=0x8047f2140, s=0x8045c3800) at modules.cc:177
 No locals.
 #3  0x0000000804a2b28c in _js_session_end (arg=0x8045c3800) at 
 sessions.cc:625
          s = 0x8045c3800
 #4  0x0000000800874dc5 in mtq_main (arg=0x80451b9a0) at mtq.cc:208
          t = 0x80451b9a0
          mpevt = 0x80454f830
          c = 0x8045c4570
 #5  0x0000000802a502fb in pth_spawn_trampoline () from 
 /usr/local/lib/pth/libpth.so.20
 No symbol table info available.
 #6  0x0000000803d91e49 in makecontext () from /lib/libc.so.7
 No symbol table info available.
 #7  0x0000000000000000 in ?? ()
 No symbol table info available.
 
 ------------- info registers ---------------
 
 (gdb) info registers
 rax            0x0      0
 rbx            0x0      0
 rcx            0x8047f34c0      34435183808
 rdx            0x0      0
 rsi            0x0      0
 rdi            0x804a4f33d      34437657405
 rbp            0x8047b0e40      0x8047b0e40
 rsp            0x8047b0e20      0x8047b0e20
 r8             0x8045c3800      34432890880
 r9             0x0      0
 r10            0x2601   9729
 r11            0x80472ac48      34434362440
 r12            0x8047a1000      34434846720
 r13            0x804407c00      34431073280
 r14            0x80441d9a0      34431162784
 r15            0x8047b1000      34434912256
 rip            0x804a3ef6d      0x804a3ef6d 
 <mod_privacy_end_session(mapi_struct*, void*)+29>
 eflags         0x10202  66050
 cs             0x43     67
 ss             0x3b     59
 ds             0x0      0
 es             0x0      0
 fs             0x0      0
 gs             0x0      0
 
 ----------- disassembly --------------
 
 (gdb) disass mod_privacy_end_session
 Dump of assembler code for function 
 _ZL23mod_privacy_end_sessionP11mapi_structPv:
 0x0000000804a3ef50 <_ZL23mod_privacy_end_sessionP11mapi_structPv+0>:    
 push   %rbp
 0x0000000804a3ef51 <_ZL23mod_privacy_end_sessionP11mapi_structPv+1>:    
 mov    %rsp,%rbp
 0x0000000804a3ef54 <_ZL23mod_privacy_end_sessionP11mapi_structPv+4>:    
 sub    $0x20,%rsp
 0x0000000804a3ef58 <_ZL23mod_privacy_end_sessionP11mapi_structPv+8>:    
 mov    %rdi,-0x10(%rbp)
 0x0000000804a3ef5c <_ZL23mod_privacy_end_sessionP11mapi_structPv+12>:   
 mov    %rsi,-0x18(%rbp)
 0x0000000804a3ef60 <_ZL23mod_privacy_end_sessionP11mapi_structPv+16>:   
 mov    -0x10(%rbp),%rsi
 0x0000000804a3ef64 <_ZL23mod_privacy_end_sessionP11mapi_structPv+20>:   
 mov    0x20(%rsi),%rdi
 0x0000000804a3ef68 <_ZL23mod_privacy_end_sessionP11mapi_structPv+24>:   
 callq  0x804a3dc20 
 <_ZL41mod_privacy_free_current_list_definitionsP14session_struct>
 0x0000000804a3ef6d <_ZL23mod_privacy_end_sessionP11mapi_structPv+29>:   
 ud2a
 End of assembler dump.
 (gdb)
 
 Hope this helps someone!