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Revu configuration de STACK_OVERFLOW_DETECTION 

git-svn-id: http://caml.inria.fr/svn/ocaml/trunk@5723 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
master
Xavier Leroy 2003-07-23 07:57:17 +00:00
parent db806efb49
commit 727d925a85
2 changed files with 12 additions and 12 deletions
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14
config/auto-aux/stackov.c
View File

@ -41,15 +41,10 @@ static void segv_handler(int signo, siginfo_t * info, void * context)
}
}
void f(char * c);
void g(char * c) { char d[1024]; f(d); }
void f(char * c) { char d[1024]; g(d); }
int main(int argc, char ** argv)
{
struct sigaltstack stk;
struct sigaction act;
struct rlimit limit;
stk.ss_sp = sig_alt_stack;
stk.ss_size = SIGSTKSZ;
@ -63,10 +58,11 @@ int main(int argc, char ** argv)
#endif
sigemptyset(&act.sa_mask);
system_stack_top = (char *) &act;
limit.rlim_max = limit.rlim_cur = 0x20000;
if (sigaltstack(&stk, NULL) != 0) { perror("sigaltstack"); return 2; }
if (sigaction(SIGSEGV, &act, NULL) != 0) { perror("sigaction"); return 2; }
if (setrlimit(RLIMIT_STACK, &limit) != 0) { perror("setrlimit"); return 2; }
f(NULL);
return 2;
/* We used to trigger a stack overflow at this point to test whether
the code above works, but this causes problems with POSIX threads
on some BSD systems. So, instead, we just test that all this
code compiles, indicating that the required syscalls are there. */
return 0;
}

10
configure vendored
View File

@ -1003,11 +1003,15 @@ fi
# Determine if system stack overflows can be detected
case "$arch,$system" in
i386,linux_elf|i386,bsd_elf)
i386,*)
if ./runtest -DTARGET_$arch -DSYS_$system stackov.c; then
echo "System stack overflow can be detected."
echo "#define HAS_STACK_OVERFLOW_DETECTION" >> s.h;;
echo "#define HAS_STACK_OVERFLOW_DETECTION" >> s.h
else
echo "Cannot detect system stack overflow."
fi;;
*)
echo "Cannot detect system stack overflow.";;
echo "Cannot detect system stack overflow.";;
esac
# Determine the target architecture for the "num" library