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backtrace by SIGSEGV

I'm debugging an application write in ansi C, a multiple threads program.

Sometime, in the main thread cause a SIGSEGV fault.

(gdb) backtrace full
#0  0x0000000000000000 in ?? ()
No symbol开发者_如何学Python table info available.
#1  0x0000000000000000 in ?? ()
No symbol table info available.
(gdb) info registers
rax            0x1      1
rbx            0x0      0
rcx            0x0      0
rdx            0x2      2
rsi            0x458e7aa0       1166965408
rdi            0x0      0
rbp            0x0      0x0
rsp            0x458e7b60       0x458e7b60
r8             0x458e7b20       1166965536
r9             0x0      0
r10            0x0      0
r11            0x206    518
r12            0x2aaaac400e70   46912522686064
r13            0x2aaaac514090   46912523813008
r14            0x1      1
r15            0x18505f10       407920400
rip            0x0      0
eflags         0x10206  [ PF IF RF ]
cs             0x33     51
ss             0x2b     43
ds             0x0      0
es             0x0      0
fs             0x63     99
gs             0x0      0
fctrl          0x37f    895
fstat          0x0      0
ftag           0xffff   65535
fiseg          0x0      0
fioff          0x0      0
foseg          0x0      0
fooff          0x0      0
fop            0x0      0
mxcsr          0x1f80   [ IM DM ZM OM UM PM ]
(gdb)

This information is from core file, I'm not very family with debug in Linux environment, Is there anything I can do to find where's the problem?

Edit: all of source files are compiled with flag as follow

gcc -O0 -g3 -Wall -c -fmessage-length=0 -MMD -MP -MF"src/redisconnector.d" -MT"src/redisconnector.d" -o"src/redisconnector.o" "../src/redisconnector.c"


Your RIP points to 0. It's probably caused by a stack overflow. Your RBP is also 0, so the backtrace gdb command will tell you nothing.


Recompile the application with "-g" option;

Use Gdb not with core files, but to run entire application:

gdb --args ./application application_options

then "run" command of gdb.

Running from gdb will detect SIGSEGV, and gdb will be focused on failed thread.


Well, first you'll need to compile with debugging enabled so that your backtrace has something usable. The flag is gcc -g

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