Bram Moolenaar wrote:
> Liu Yubao wrote:
>> I found VIM(https://vim.svn.sourceforge.net/svnroot/vim/[EMAIL
>> PROTECTED])
>> exits when I enable profiling flags in src/Makefile:
>
>> I compile and test the code on Debian Etch.
>
> I'm running on FreeBSD, it works just fine without disabling that
> SIGPROF line. Is there something about Debian that works differently
> with signals?
>
I test the program below on Debian Etch, Debian Lenny, Ubuntu Gusty,
Fedora Core and FreeBSD, strangely it doesn't trigger func_deadly()
only on FreeBSD. I'm not sure whether it's a bug or a feature in Linux
kernel.
Here are some version information:
Debian Etch: linux kernel 2.6.18-4-686, gcc 4.1.2, libc 2.3.6
Debian Lenny: linux kernel 2.6.22-3-686, gcc 4.2.3, libc 2.7
Ubuntu Gusty: linux kernel 2.6.22-14-generic(x86_64), gcc 4.1.3, libc 2.6.1
Fedora Core 6: linux kernel 2.6.20(x86_64), gcc 4.1.2, libc 2.5
Fedora Core 7: linux kernel 2.6.23.8-34(x86_64), gcc 4.1.2
FreeBSD 6.2: gcc 3.4.6
FreeBSD 7.0: gcc 4.2.1
And the source code:
/*
* $ gcc -g -pg -o sigprof sigprof.c
* $ ./sigprof
*/
#include <stdio.h>
#include <unistd.h>
#include <signal.h>
void func_deadly(int signo)
{
fprintf(stderr, "dead: signo=%d, SIGPROF=%d\n", signo, SIGPROF);
_exit(1);
}
int main(void)
{
int n = 0;
int a = 1, b = 2;
struct sigaction sa;
sa.sa_handler = func_deadly;
sa.sa_flags = SA_ONSTACK;
sigemptyset(&sa.sa_mask);
sigaction(SIGPROF, &sa, NULL);
#if 1
/* can receive SIGPROF */
while (++n < 10000000)
a = a * b * b * a * b * b / 3;
#else
/* can't receive SIGPROF */
while (++n < 4)
sleep(2);
#endif
return 0;
}
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