Add test about pthread_mutex_t owner tid limit.
Bug: 19216648
Change-Id: I7b12955bdcad31c13bf8ec2740ff88ba15223ec0
diff --git a/tests/pthread_test.cpp b/tests/pthread_test.cpp
index cb32079..5dc60ee 100644
--- a/tests/pthread_test.cpp
+++ b/tests/pthread_test.cpp
@@ -27,6 +27,7 @@
#include <malloc.h>
#include <pthread.h>
#include <signal.h>
+#include <stdio.h>
#include <sys/mman.h>
#include <sys/syscall.h>
#include <time.h>
@@ -1092,3 +1093,14 @@
ASSERT_EQ(EPERM, pthread_mutex_unlock(&lock));
ASSERT_EQ(0, pthread_mutex_destroy(&lock));
}
+
+TEST(pthread, pthread_mutex_owner_tid_limit) {
+ FILE* fp = fopen("/proc/sys/kernel/pid_max", "r");
+ ASSERT_TRUE(fp != NULL);
+ long pid_max;
+ ASSERT_EQ(1, fscanf(fp, "%ld", &pid_max));
+ fclose(fp);
+ // Current pthread_mutex uses 16 bits to represent owner tid.
+ // Change the implementation if we need to support higher value than 65535.
+ ASSERT_LE(pid_max, 65536);
+}