Bug 31922
| Summary: | SIGTERM cause segfault | ||
|---|---|---|---|
| Product: | [Retired] Red Hat Raw Hide | Reporter: | Olivier Baudron <olivier.baudron> |
| Component: | gcc | Assignee: | Jakub Jelinek <jakub> |
| Status: | CLOSED NOTABUG | QA Contact: | David Lawrence <dkl> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 1.0 | ||
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | i386 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2001-03-16 15:24:17 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
Cannot reproduce it with either glibc 2.2.2-4 and 2.2.2-6, (there were no suspicious changes in 2.2.2-5), on kernel 2.4.0. If this can help, feel free to test the "bug" on my PC: $ ssh -l guest baud.dyndns.org The password is 'guest'. Files 'test.c' and 'test' are in the homedir. The issue is that you don't have compat-glibc installed. kgcc does not require it, since kgcc is for kernel compilation only. If you want to use it for userland compilation, then you should install compat-egcs (and that requires compat-glibc) and use either egcs or i386-glibc21-linux-gcc gcc drivers. BTW: This has been revamped recently, so there is no kgcc package any longer and egcs/kgcc/egcs++ commands in compat-* packages mean egcs 1.1.2 using glibc 2.2.2 headers and linking against those libraries, while i386-glibc21-* commands use glibc 2.1.x headers and link against 2.1.x libraries. In fact the testcase is very sensitive to lots of things. For example, a
different order in the declaration of variables makes it works or not. This
makes me think that something is wrong somewhere in gcc or glibc...
I found a new testcase that segfaults (on a SIGTERM signal) with gcc-2.96-78 +
glibc-2.2.2-5 + kernel-2.4.2. Would you mind testing it at RedHat or on my PC?
test.c:
--------------------------- cut here ---------------------------------
#include <stdlib.h>
#include <stdio.h>
#include <signal.h>
void arret (int n) {
printf ("End.\n");
exit (0);
}
int main (int argc, char **argv) {
struct sigaction sig;
int err;
sig.sa_handler = arret;
err = sigaction (SIGTERM, &sig, NULL);
while (1);
return 0;
}
--------------------------- cut here ---------------------------------
Sorry, the bug was in the programmer (me)! |
The following bug happens when compiling with kcc-1.1.2-40 (and not with gcc-2.96-78). test.c: --------------------------- cut here --------------------------------- #include <stdio.h> #include <signal.h> void arret (int n) { int err=0; printf ("err=%d\n", err); } int main (int argc, char **argv) { int err[4]; struct sigaction sig; sig.sa_handler = arret; err[0] = sigaction (SIGTERM, &sig, NULL); while (1); return 0; } --------------------------- cut here --------------------------------- $ kgcc -Wall -g -o test test.c $ ./test Then, send SIGTERM to the process 'test'. This one halts with: Segmentation fault Note: The kernel is a 2.2.4, and glibc is 2.2.2-5.