Another braindead but useful test. The point here is to start
testing cryo on multiple tasks.
If you run
./tests/fork 0
then restart works fine. If you run
./tests/fork 1 # (or anything greater than 1)
then there is a segfault on restart. It looks a lot like the
problem which Benjamin solved by re-enabling the NPTL code, but
I haven't quite tracked it down yet.
-serge
>From 8dd009389ada5106ad8c5d8b6e565ec75f13177a Mon Sep 17 00:00:00 2001
From: Serge E. Hallyn <[EMAIL PROTECTED]>
Date: Tue, 24 Jun 2008 10:12:34 -0400
Subject: [PATCH 1/1] tests: add simple forker test
Add a test which forks atoi(argv[1]) times, then sleeps 1 min.
Signed-off-by: Serge E. Hallyn <[EMAIL PROTECTED]>
---
tests/Makefile | 2 +-
tests/fork.c | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 54 insertions(+), 1 deletions(-)
create mode 100644 tests/fork.c
diff --git a/tests/Makefile b/tests/Makefile
index 925b7af..f8233a2 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -1,4 +1,4 @@
-TARGETS = sleep mksysvipc pause_asm pipe sockudp
+TARGETS = sleep mksysvipc pause_asm pipe sockudp fork
CFLAGS = -static
diff --git a/tests/fork.c b/tests/fork.c
new file mode 100644
index 0000000..955d475
--- /dev/null
+++ b/tests/fork.c
@@ -0,0 +1,53 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <signal.h>
+#include <string.h>
+
+void sighandler(int sig)
+{
+ printf("%d: got signal %d\n", getpid(), sig);
+}
+
+void do_sleep(int whoami)
+{
+ int i;
+ for (i=0; i<30; i++)
+ sleep(2);
+ printf("%d: exiting\n", whoami);
+ exit(0);
+}
+
+int main(int argc, char *argv[])
+{
+ int nt, i;
+ int *pids;
+ struct sigaction s;
+
+ if (argc<2) {
+ exit(1);
+ }
+
+ memset(&s, 0, sizeof(s));
+ s.sa_handler = sighandler;
+ sigaction(SIGUSR1, &s, NULL);
+ nt = atoi(argv[1]);
+ pids = malloc(nt);
+ if (!pids)
+ exit(2);
+ for (i=0; i<nt; i++) {
+ pids[i] = fork();
+ if (pids[i]<0) {
+ perror("fork");
+ exit(3);
+ } else if (pids[i] == 0)
+ do_sleep(i);
+ printf("forked %d\n", i);
+ }
+ for (i=0; i<30; i++)
+ sleep(2);
+ free(pids);
+ printf("main: exiting\n");
+ exit(0);
+}
--
1.5.4.1
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