I'm trying to compile my homework and I needed to recreate strlwr() (only available on Windows), and I'm getting this error:
Program received signal SIGSEGV, Segmentation fault.
__strlen_avx2 () at ../sysdeps/x86_64/multiarch/strlen-avx2.S:65
65 ../sysdeps/x86_64/multiarch/strlen-avx2.S: No such file or directory.
I'm using this strlwr().
I found the code for strlen-avx2.S, but I can't find it in my system.
If I use this one, there's no mention of strlen-avx2.S, but still getting segmentation fault:
Program received signal SIGSEGV, Segmentation fault.
0x000055555555532d in strlwr (str=0x0) at parser.c:36
36 while (*p) {
Related
I am getting a segmentation fault right after I am creating a thread. The thread that I am creating is globally defined list. gdb descriptioncode Stdout does not print the print statement right after pthread_create. Would appreciate any help
I am using gdb to find out why I am getting a seg fault. I run the command gba myProg core so I can see the core dump from the seg fault. The core dump reads as follows.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 __GI__IO_fwrite (buf=0x7f32040167a0, size=1, count=2, fp=0x0) at iofwrite.c:37
37 iofwrite.c: No such file or directory.
[Current thread is 1 (Thread 0x7f3209bac700 (LWP 20157))]
I'm having a hard time figuring out the error message. It seems to be saying that the seg fault is due to iofwrite.c but I can't seem to find any information on such a file. I assume it relates to fwrite.
You are passing a NULL fp to fwrite(). It's impossible to answer more completely without code.
I had encounted this question too, the reason was my output file name is invalid.
When running my code, it crashes and says "Segmentation fault".
However, when I run through it in gdb, it crashes due to a SIGABRT error not a SIGSEGV.
Are there other signals that also "map" to a general Segmentation fault error on the terminal?
abort() sends the calling process the SIGABRT signal, this is how SIGABRT or Signal 6 is generated. Also, most "assert" implementations make use of SIGABRT in case of a failed assert.
abort() is usually called by library functions which detect an internal error or some seriously broken constraint. For example malloc() will call abort() if its internal structures are damaged by a heap overflow.
SIGSEGV or Signal 11, officially know as "segmentation fault", means that the program accessed a memory location that was not assigned. That's usually a bug in the program. So if you're writing your own program, that's the most likely cause. otherwise I do not see any other signal will create segmentation fault in a program.
I've a problem finishing a thread, and doing the debug with GDB I've found that I've a segmentation after invoking the function pthread_exit(NULL);
Some messages which I've are
Program received signal SIGSEGV, Segmentation fault.
[Switching to LWP 12371]
0x400e9fd0 in free () from /lib/libc.so.6
Debugging with this option "gdb -c core EMBEDDED" I've got this warning message
"warning: Unable to find libthread_db matching inferior's thread library, thread debugging will not be available.
Core was generated by `/home/root/SSL/EMBEDDED'.
Program terminated with signal 11, Segmentation fault.
0 0x400e9fd0 in free () from /lib/libc.so.6"
Some advices, some suggestions are welcome, thanks.
I am teaching myself to use gdb and am running some random tests. It may be worth mentioning that I am using a portable installation of MinGW on Windows 7 x64. I've created a program which I know results in a stack overflow, and as I run through it in gdb I first get two SIGSEGV signals (no surprise), and then it exits (again no surprise) with code 030000000375.
Program received signal SIGSEGV, Segmentation fault.
Program received signal SIGSEGV, Segmentation fault.
Program exited with code 030000000375.
Curiosity getting the best of me... what the heck is that code? I googled it and found very little.
Thanks!
UPDATE: For reference I tried the same program on Ubuntu, and the results are slightly different:
Program received signal SIGSEGV, Segmentation fault.
Program terminated with signal SIGSEGV, Segmentation fault.
The program no longer exists.
gdb prints out the exit code in octal format. Not obvious, but indicated by the leading 0.
So 030000000375 is 0xC00000FD in hex, which makes the code look much more common to a windows programmer.
0xC00000FD is STATUS_STACK_OVERFLOW and should be defined in ntstatus.h.