| //===-- Unittests for getrlimit and setrlimit -----------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "src/__support/CPP/string_view.h" |
| #include "src/errno/libc_errno.h" |
| #include "src/fcntl/open.h" |
| #include "src/sys/resource/getrlimit.h" |
| #include "src/sys/resource/setrlimit.h" |
| #include "src/unistd/close.h" |
| #include "src/unistd/unlink.h" |
| #include "test/UnitTest/ErrnoSetterMatcher.h" |
| #include "test/UnitTest/Test.h" |
| |
| #include <sys/resource.h> |
| |
| TEST(LlvmLibcResourceLimitsTest, SetNoFileLimit) { |
| using __llvm_libc::testing::ErrnoSetterMatcher::Fails; |
| using __llvm_libc::testing::ErrnoSetterMatcher::Succeeds; |
| |
| // The test strategy is to first create initialize two file descriptors |
| // successfully. Next, close the files and set the file descriptor limit |
| // to 4. This will allow us to open one of those file but not the other. |
| |
| constexpr const char *TEST_FILE1 = "testdata/resource_limits1.test"; |
| constexpr const char *TEST_FILE2 = "testdata/resource_limits2.test"; |
| libc_errno = 0; |
| |
| int fd1 = __llvm_libc::open(TEST_FILE1, O_CREAT | O_WRONLY, S_IRWXU); |
| ASSERT_GT(fd1, 0); |
| ASSERT_EQ(libc_errno, 0); |
| int fd2 = __llvm_libc::open(TEST_FILE2, O_CREAT | O_WRONLY, S_IRWXU); |
| ASSERT_GT(fd2, 0); |
| ASSERT_EQ(libc_errno, 0); |
| |
| ASSERT_THAT(__llvm_libc::close(fd1), Succeeds(0)); |
| ASSERT_THAT(__llvm_libc::close(fd2), Succeeds(0)); |
| |
| struct rlimit limits { |
| 4, 4 |
| }; |
| ASSERT_THAT(__llvm_libc::setrlimit(RLIMIT_NOFILE, &limits), Succeeds(0)); |
| |
| // One can now only open one of the files successfully. |
| fd1 = __llvm_libc::open(TEST_FILE1, O_RDONLY); |
| ASSERT_GT(fd1, 0); |
| ASSERT_EQ(libc_errno, 0); |
| fd2 = __llvm_libc::open(TEST_FILE2, O_RDONLY); |
| ASSERT_LT(fd2, 0); |
| ASSERT_NE(libc_errno, 0); |
| |
| libc_errno = 0; |
| ASSERT_THAT(__llvm_libc::close(fd1), Succeeds(0)); |
| |
| fd2 = __llvm_libc::open(TEST_FILE2, O_RDONLY); |
| ASSERT_GT(fd2, 0); |
| ASSERT_EQ(libc_errno, 0); |
| fd1 = __llvm_libc::open(TEST_FILE1, O_RDONLY); |
| ASSERT_LT(fd1, 0); |
| ASSERT_NE(libc_errno, 0); |
| |
| libc_errno = 0; |
| ASSERT_THAT(__llvm_libc::close(fd2), Succeeds(0)); |
| |
| ASSERT_THAT(__llvm_libc::unlink(TEST_FILE1), Succeeds(0)); |
| ASSERT_THAT(__llvm_libc::unlink(TEST_FILE2), Succeeds(0)); |
| |
| struct rlimit current_limits; |
| ASSERT_THAT(__llvm_libc::getrlimit(RLIMIT_NOFILE, ¤t_limits), |
| Succeeds(0)); |
| ASSERT_EQ(current_limits.rlim_cur, rlim_t(4)); |
| ASSERT_EQ(current_limits.rlim_max, rlim_t(4)); |
| } |