Re: [boost] [context review] Several Questions

Subject: Re: [boost] [context review] Several Questions
From: Artyom (artyomtnk_at_[hidden])
Date: 2011-03-21 18:28:04

> 

> I'm not sure what you did that it crashes. Can you tell me on  which line of 
>code it happens (gdb -> stacktrace).
> 

This is what I got from gdb so far:

Program received signal SIGSEGV, Segmentation fault.
0x00000000006033f0 in get_fcontext ()
(gdb) bt
#0  0x00000000006033f0 in get_fcontext ()
#1  0x00000000004018cd in context () at 
../../boost_1_46_0/boost/context/context.hpp:68
#2  main () at link.cpp:24
(gdb) frame 0
#0  0x00000000006033f0 in get_fcontext ()
(gdb) disassemble 
Dump of assembler code for function get_fcontext:
=> 0x00000000006033f0 <+0>:    mov    %rbx,(%rdi)
   0x00000000006033f3 <+3>:    mov    %r12,0x8(%rdi)
   0x00000000006033f7 <+7>:    mov    %r13,0x10(%rdi)
   0x00000000006033fb <+11>:    mov    %r14,0x18(%rdi)
   0x00000000006033ff <+15>:    mov    %r15,0x20(%rdi)
   0x0000000000603403 <+19>:    mov    %rbp,0x28(%rdi)
   0x0000000000603407 <+23>:    stmxcsr 0x48(%rdi)
   0x000000000060340b <+27>:    fnstcw 0x4c(%rdi)
   0x000000000060340e <+30>:    lea    0x8(%rsp),%rcx
   0x0000000000603413 <+35>:    mov    %rcx,0x30(%rdi)
   0x0000000000603417 <+39>:    mov    (%rsp),%rcx
   0x000000000060341b <+43>:    mov    %rcx,0x38(%rdi)
   0x000000000060341f <+47>:    xor    %rax,%rax
   0x0000000000603422 <+50>:    retq   
End of assembler dump.
(gdb) info registers 
rax            0x0    0
rbx            0x7fffffffe0b0    140737488347312
rcx            0x0    0
rdx            0x0    0
rsi            0x7fffffffe1e0    140737488347616
rdi            0x7fffffffe0b0    140737488347312
rbp            0x7fffffffe140    0x7fffffffe140
rsp            0x7fffffffe098    0x7fffffffe098
r8             0x5    5
r9             0x0    0
r10            0x7fffffffde20    140737488346656
r11            0x7ffff7bc7378    140737349710712
r12            0x4015f0    4199920
r13            0x7fffffffe1d0    140737488347600
r14            0x0    0
r15            0x0    0
rip            0x6033f0    0x6033f0 <get_fcontext>
eflags         0x10246    [ PF ZF IF RF ]
cs             0x33    51
ss             0x2b    43
ds             0x0    0
es             0x0    0
fs             0x0    0
gs             0x0    0
(gdb) 

Artyom