-g was added, The Compile info and gdb is below. thanks!
<gcc4.8 path>/i686-linux5.0-gcc -fsanitize=address -g -Wl,-rpath=<libasan
path>/lib -o segerror1 ./segerror1.c
(gdb) run
Starting program: /tmp/./segerror1
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
Program received signal SIGSEGV, Segmentation fault.
0x0804868b in main () at ./segerror1.c:11
11 memset(&sa, 0, sizeof(sigaction));
(gdb) bt
#0 0x0804868b in main () at ./segerror1.c:11
(gdb) bt full
#0 0x0804868b in main () at ./segerror1.c:11
sa = {__sigaction_handler = {sa_handler = 0xbffff588, sa_sigaction
= 0xbffff588}, sa_mask = {__val = {3087006324, 0, 3062103960, 1, 0, 1,
3087005976, 3061966280, 3061966288,
3221222824, 3064042993, 3063833572, 3061050508, 3221222824,
3061014528, 3061094460, 3062313366, 0, 3064042993, 3221222916, 3061966280,
3064000985, 134518996, 134514512,
0, 3221222776, 134514484, 3064105672, 3064104756, 3221222792,
134514653, 134514512}}, sa_flags = 134519256, sa_restorer = 0xbffff598}
On Thursday, January 16, 2014 11:30:33 AM UTC+8, kcc wrote:
>
> This does not happen for me:
>
> % cat z.c
> #include <signal.h>
> #include <stdio.h>
> #include <stdlib.h>
> #include <string.h>
>
>
> int main(void)
> {
> struct sigaction sa;
>
> memset(&sa, 0, sizeof(sigaction));
> sigemptyset(&sa.sa_mask);
> // sa.sa_flags = SA_SIGINFO;
>
> // sigaction(SIGSEGV, &sa, NULL);
>
> return 0;
> }
> % clang z.c -fsanitize=address && ./a.out
> %
>
>
> Please provide more info. How do you compile? (make sure to add -g)
> run this under gdb and show what 'bt' says.
>
> --kcc
>
>
> On Thu, Jan 16, 2014 at 7:14 AM, laser <[email protected] <javascript:>>
> wrote:
> > Hi experts,
> >
> > asan report segment fault error for memset line in the simple code
> below,
> > valgrind doesn't report it, could you explain the reason?
> >
> >
> > 1 #include <signal.h>
> > 2 #include <stdio.h>
> > 3 #include <stdlib.h>
> > 4 #include <string.h>
> > 5
> > 6
> > 7 int main(void)
> > 8 {
> > 9 struct sigaction sa;
> > 10
> > 11 memset(&sa, 0, sizeof(sigaction));
> > 12 sigemptyset(&sa.sa_mask);
> > 13 // sa.sa_flags = SA_SIGINFO;
> > 14
> > 15 // sigaction(SIGSEGV, &sa, NULL);
> > 16
> > 17 return 0;
> > 18 }
> >
> >
> >
> >
> >
> > root@terry-lx:/tmp# ./segerror1
> >
> > ASAN:SIGSEGV
> >
> > =================================================================
> >
> > ==26565== ERROR: AddressSanitizer: SEGV on unknown address 0x17f91a12
> (pc
> > 0x0804868b sp 0xbfc8d060 bp 0xbfc8d158 T0)
> >
> > AddressSanitizer can not provide additional info.
> >
> > #0 0x804868a (/tmp/segerror1+0x804868a)
> >
> > #1 0xb5fda4d2 (/lib/i386-linux-gnu/libc-2.15.so+0x194d2)
> >
> > #2 0x8048510 (/tmp/segerror1+0x8048510)
> >
> > ==26565== ABORTING
> >
> > root@test-lx:/tmp# ./segerror1 2>&1 | ./asan_symbolize.py | c++filt
> >
> > /tmp/llvm-3.4/llvm/Release+Asserts/bin/llvm-symbolizer
> > --use-symbol-table=true --demangle=False --functions=true
> --inlining=true
> >
> > ASAN:SIGSEGV
> >
> > =================================================================
> >
> > ==26566== ERROR: AddressSanitizer: SEGV on unknown address 0x17ff0c3a
> (pc
> > 0x0804868b sp 0xbff861a0 bp 0xbff86298 T0)
> >
> > AddressSanitizer can not provide additional info.
> >
> > #0 0x804868a (/tmp/segerror1+0x804868a)
> >
> >
> > /tmp/segerror1 0x804868a
> >
> > #0 0x804868a in main /tmp/./segerror1.c:11:0
> >
> > #1 0xb60184d2 (/lib/i386-linux-gnu/libc-2.15.so+0x194d2)
> >
> >
> > /lib/i386-linux-gnu/libc-2.15.so 0x194d2
> >
> > addr2line -f -e /lib/i386-linux-gnu/libc-2.15.so
> >
> > /lib/i386-linux-gnu/libc-2.15.so 0x194d2
> >
> > #1 0xb60184d2 in __libc_start_main
> > /build/buildd/eglibc-2.15/csu/libc-start.c:226
> >
> > #2 0x8048510 (/tmp/segerror1+0x8048510)
> >
> >
> > /tmp/segerror1 0x8048510
> >
> > addr2line -f -e /tmp/segerror1
> >
> > /tmp/segerror1 0x8048510
> >
> > #2 0x8048510 in _start ??:0
> >
> > ==26566== ABORTING
> >
> >
> > --
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