1 files changed, 0 insertions, 184 deletions
diff --git a/test/syscalls/linux/kcov.cc b/test/syscalls/linux/kcov.cc
deleted file mode 100644
index 6816c1fd0..000000000
--- a/test/syscalls/linux/kcov.cc
+++ /dev/null
@@ -1,184 +0,0 @@
-// Copyright 2018 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <sys/errno.h>
-#include <sys/ioctl.h>
-#include <sys/mman.h>
-
-#include <atomic>
-
-#include "gtest/gtest.h"
-#include "test/util/capability_util.h"
-#include "test/util/file_descriptor.h"
-#include "test/util/test_util.h"
-#include "test/util/thread_util.h"
-
-namespace gvisor {
-namespace testing {
-
-namespace {
-
-// For this set of tests to run, they must be run with coverage enabled. On
-// native Linux, this involves compiling the kernel with kcov enabled. For
-// gVisor, we need to enable the Go coverage tool, e.g. bazel test --
-// collect_coverage_data --instrumentation_filter=//pkg/... <test>.
-
-constexpr char kcovPath[] = "/sys/kernel/debug/kcov";
-constexpr int kSize = 4096;
-constexpr int KCOV_INIT_TRACE = 0x80086301;
-constexpr int KCOV_ENABLE = 0x6364;
-constexpr int KCOV_DISABLE = 0x6365;
-
-uint64_t* KcovMmap(int fd) {
-  return (uint64_t*)mmap(nullptr, kSize * sizeof(uint64_t),
-                         PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
-}
-
-TEST(KcovTest, Kcov) {
-  SKIP_IF(!ASSERT_NO_ERRNO_AND_VALUE(HaveCapability((CAP_DAC_OVERRIDE))));
-
-  int fd;
-  ASSERT_THAT(fd = open(kcovPath, O_RDWR),
-              AnyOf(SyscallSucceeds(), SyscallFailsWithErrno(ENOENT)));
-  // Kcov not available.
-  SKIP_IF(errno == ENOENT);
-  auto fd_closer = Cleanup([fd]() { close(fd); });
-
-  ASSERT_THAT(ioctl(fd, KCOV_INIT_TRACE, kSize), SyscallSucceeds());
-  uint64_t* area = KcovMmap(fd);
-  ASSERT_TRUE(area != MAP_FAILED);
-  ASSERT_THAT(ioctl(fd, KCOV_ENABLE, 0), SyscallSucceeds());
-
-  for (int i = 0; i < 10; i++) {
-    // Make some syscalls to generate coverage data.
-    ASSERT_THAT(ioctl(fd, KCOV_ENABLE, 0), SyscallFailsWithErrno(EINVAL));
-  }
-
-  uint64_t num_pcs = *(uint64_t*)(area);
-  EXPECT_GT(num_pcs, 0);
-  for (uint64_t i = 1; i <= num_pcs; i++) {
-    // Verify that PCs are in the standard kernel range.
-    EXPECT_GT(area[i], 0xffffffff7fffffffL);
-  }
-
-  ASSERT_THAT(ioctl(fd, KCOV_DISABLE, 0), SyscallSucceeds());
-}
-
-TEST(KcovTest, PrematureMmap) {
-  SKIP_IF(!ASSERT_NO_ERRNO_AND_VALUE(HaveCapability((CAP_DAC_OVERRIDE))));
-
-  int fd;
-  ASSERT_THAT(fd = open(kcovPath, O_RDWR),
-              AnyOf(SyscallSucceeds(), SyscallFailsWithErrno(ENOENT)));
-  // Kcov not available.
-  SKIP_IF(errno == ENOENT);
-  auto fd_closer = Cleanup([fd]() { close(fd); });
-
-  // Cannot mmap before KCOV_INIT_TRACE.
-  uint64_t* area = KcovMmap(fd);
-  ASSERT_TRUE(area == MAP_FAILED);
-}
-
-// Tests that multiple kcov fds can be used simultaneously.
-TEST(KcovTest, MultipleFds) {
-  SKIP_IF(!ASSERT_NO_ERRNO_AND_VALUE(HaveCapability((CAP_DAC_OVERRIDE))));
-
-  int fd1;
-  ASSERT_THAT(fd1 = open(kcovPath, O_RDWR),
-              AnyOf(SyscallSucceeds(), SyscallFailsWithErrno(ENOENT)));
-  // Kcov not available.
-  SKIP_IF(errno == ENOENT);
-
-  int fd2;
-  ASSERT_THAT(fd2 = open(kcovPath, O_RDWR), SyscallSucceeds());
-  auto fd_closer = Cleanup([fd1, fd2]() {
-    close(fd1);
-    close(fd2);
-  });
-
-  auto t1 = ScopedThread([&] {
-    ASSERT_THAT(ioctl(fd1, KCOV_INIT_TRACE, kSize), SyscallSucceeds());
-    uint64_t* area = KcovMmap(fd1);
-    ASSERT_TRUE(area != MAP_FAILED);
-    ASSERT_THAT(ioctl(fd1, KCOV_ENABLE, 0), SyscallSucceeds());
-  });
-
-  ASSERT_THAT(ioctl(fd2, KCOV_INIT_TRACE, kSize), SyscallSucceeds());
-  uint64_t* area = KcovMmap(fd2);
-  ASSERT_TRUE(area != MAP_FAILED);
-  ASSERT_THAT(ioctl(fd2, KCOV_ENABLE, 0), SyscallSucceeds());
-}
-
-// Tests behavior for two threads trying to use the same kcov fd.
-TEST(KcovTest, MultipleThreads) {
-  SKIP_IF(!ASSERT_NO_ERRNO_AND_VALUE(HaveCapability((CAP_DAC_OVERRIDE))));
-
-  int fd;
-  ASSERT_THAT(fd = open(kcovPath, O_RDWR),
-              AnyOf(SyscallSucceeds(), SyscallFailsWithErrno(ENOENT)));
-  // Kcov not available.
-  SKIP_IF(errno == ENOENT);
-  auto fd_closer = Cleanup([fd]() { close(fd); });
-
-  // Test the behavior of multiple threads trying to use the same kcov fd
-  // simultaneously.
-  std::atomic<bool> t1_enabled(false), t1_disabled(false), t2_failed(false),
-      t2_exited(false);
-  auto t1 = ScopedThread([&] {
-    ASSERT_THAT(ioctl(fd, KCOV_INIT_TRACE, kSize), SyscallSucceeds());
-    uint64_t* area = KcovMmap(fd);
-    ASSERT_TRUE(area != MAP_FAILED);
-    ASSERT_THAT(ioctl(fd, KCOV_ENABLE, 0), SyscallSucceeds());
-    t1_enabled = true;
-
-    // After t2 has made sure that enabling kcov again fails, disable it.
-    while (!t2_failed) {
-      sched_yield();
-    }
-    ASSERT_THAT(ioctl(fd, KCOV_DISABLE, 0), SyscallSucceeds());
-    t1_disabled = true;
-
-    // Wait for t2 to enable kcov and then exit, after which we should be able
-    // to enable kcov again, without needing to set up a new memory mapping.
-    while (!t2_exited) {
-      sched_yield();
-    }
-    ASSERT_THAT(ioctl(fd, KCOV_ENABLE, 0), SyscallSucceeds());
-  });
-
-  auto t2 = ScopedThread([&] {
-    // Wait for t1 to enable kcov, and make sure that enabling kcov again fails.
-    while (!t1_enabled) {
-      sched_yield();
-    }
-    ASSERT_THAT(ioctl(fd, KCOV_ENABLE, 0), SyscallFailsWithErrno(EINVAL));
-    t2_failed = true;
-
-    // Wait for t1 to disable kcov, after which using fd should now succeed.
-    while (!t1_disabled) {
-      sched_yield();
-    }
-    uint64_t* area = KcovMmap(fd);
-    ASSERT_TRUE(area != MAP_FAILED);
-    ASSERT_THAT(ioctl(fd, KCOV_ENABLE, 0), SyscallSucceeds());
-  });
-
-  t2.Join();
-  t2_exited = true;
-}
-
-}  // namespace
-
-}  // namespace testing
-}  // namespace gvisor