Add a program to test if tls data is clean.

3 files changed, 52 insertions, 1 deletions

diff --git a/tools/regression/tls/Makefile b/tools/regression/tls/Makefile
index aea3025..76def96 100644
--- a/tools/regression/tls/Makefile
+++ b/tools/regression/tls/Makefile
@@ -1,6 +1,6 @@
 # $FreeBSD$
 
-SUBDIR=libxx libyy ttls1 ttls2
+SUBDIR=libxx libyy ttls1 ttls2 ttls4
 
 .if ${MACHINE_ARCH} == "i386"
 SUBDIR+=ttls3
diff --git a/tools/regression/tls/ttls4/Makefile b/tools/regression/tls/ttls4/Makefile
new file mode 100644
index 0000000..5fb37df
--- /dev/null
+++ b/tools/regression/tls/ttls4/Makefile
@@ -0,0 +1,8 @@
+# $FreeBSD$
+
+PROG=	ttls4
+LDADD+=	-lpthread
+NO_MAN=
+DEBUG_FLAGS= -g
+
+.include <bsd.prog.mk>
diff --git a/tools/regression/tls/ttls4/ttls4.c b/tools/regression/tls/ttls4/ttls4.c
new file mode 100644
index 0000000..9a1d43b
--- /dev/null
+++ b/tools/regression/tls/ttls4/ttls4.c
@@ -0,0 +1,43 @@
+/*
+ * This program tests if a new thread's initial tls data
+ * is clean.
+ *
+ * David Xu <davidxu@freebsd.org>
+ *
+ * $FreeBSD$
+ */
+
+#include <stdio.h>
+#include <pthread.h>
+
+int __thread n;
+
+void *f1(void *arg)
+{
+	n = 1;
+	return (0);
+}
+
+void *f2(void *arg)
+{
+	if (n != 0) {
+		printf("bug, n == %d \n", n);
+		exit(1);
+	}
+	return (0);
+}
+
+int main()
+{
+	pthread_t td;
+	int i;
+
+	pthread_create(&td, NULL, f1, NULL);
+	pthread_join(td, NULL);
+	for (i = 0; i < 1000; ++i) {
+		pthread_create(&td, NULL, f2, NULL);
+		pthread_yield();
+		pthread_join(td, NULL);
+	}
+	return (0);
+}