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authorZyad A. Ali <zyad.ali.me@gmail.com>2021-06-01 20:17:06 +0200
committerZyad A. Ali <zyad.ali.me@gmail.com>2021-06-01 20:41:57 +0200
commit69e3476ad5247a11f4b93e29607bb7c1513d3cc4 (patch)
treeba45316c013478e3cb16e0fd6a9d51cb1f0563b5
parent16d25c972c7d66e8f788c853519788f6bffc1bd2 (diff)
Test system-wide semaphore limits.
-rw-r--r--test/syscalls/linux/semaphore.cc18
1 files changed, 16 insertions, 2 deletions
diff --git a/test/syscalls/linux/semaphore.cc b/test/syscalls/linux/semaphore.cc
index 2ce8f836c..54cbda19d 100644
--- a/test/syscalls/linux/semaphore.cc
+++ b/test/syscalls/linux/semaphore.cc
@@ -22,12 +22,12 @@
#include <ctime>
#include <set>
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
#include "absl/base/macros.h"
#include "absl/memory/memory.h"
#include "absl/synchronization/mutex.h"
#include "absl/time/clock.h"
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
#include "test/util/capability_util.h"
#include "test/util/test_util.h"
#include "test/util/thread_util.h"
@@ -49,6 +49,9 @@ constexpr int kSemAem = 32767;
class AutoSem {
public:
+ // Creates a new private semaphore.
+ AutoSem() : id_(semget(IPC_PRIVATE, 1, 0)) {}
+
explicit AutoSem(int id) : id_(id) {}
~AutoSem() {
if (id_ >= 0) {
@@ -101,6 +104,17 @@ TEST(SemaphoreTest, SemGet) {
EXPECT_NE(sem3.get(), sem2.get());
}
+// Tests system-wide limits for semget.
+TEST(SemaphoreTest, SemGetSystemLimits) {
+ // Exceed number of semaphores per set.
+ EXPECT_THAT(semget(IPC_PRIVATE, kSemMsl + 1, 0),
+ SyscallFailsWithErrno(EINVAL));
+
+ // Exceed system-wide limit for semaphore sets by 1.
+ AutoSem sems[kSemMni];
+ EXPECT_THAT(semget(IPC_PRIVATE, 1, 0), SyscallFailsWithErrno(ENOSPC));
+}
+
// Tests simple operations that shouldn't block in a single-thread.
TEST(SemaphoreTest, SemOpSingleNoBlock) {
AutoSem sem(semget(IPC_PRIVATE, 1, 0600 | IPC_CREAT));