Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(1034)

Unified Diff: sandbox/linux/tests/unit_tests.cc

Issue 670183003: Update from chromium 62675d9fb31fb8cedc40f68e78e8445a74f362e7 (Closed) Base URL: git@github.com:domokit/mojo.git@master
Patch Set: Created 6 years, 2 months ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View side-by-side diff with in-line comments
Download patch
« no previous file with comments | « sandbox/linux/tests/unit_tests.h ('k') | sandbox/linux/tests/unit_tests_unittest.cc » ('j') | no next file with comments »
Expand Comments ('e') | Collapse Comments ('c') | Show Comments Hide Comments ('s')
Index: sandbox/linux/tests/unit_tests.cc
diff --git a/sandbox/linux/tests/unit_tests.cc b/sandbox/linux/tests/unit_tests.cc
new file mode 100644
index 0000000000000000000000000000000000000000..b7c3af673e231aac68a57a2428ab4f18ba4a6221
--- /dev/null
+++ b/sandbox/linux/tests/unit_tests.cc
@@ -0,0 +1,326 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <fcntl.h>
+#include <poll.h>
+#include <signal.h>
+#include <stdio.h>
+#include <sys/resource.h>
+#include <sys/time.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "base/debug/leak_annotations.h"
+#include "base/files/file_util.h"
+#include "base/posix/eintr_wrapper.h"
+#include "base/third_party/valgrind/valgrind.h"
+#include "build/build_config.h"
+#include "sandbox/linux/tests/unit_tests.h"
+
+namespace {
+std::string TestFailedMessage(const std::string& msg) {
+ return msg.empty() ? std::string() : "Actual test failure: " + msg;
+}
+
+int GetSubProcessTimeoutTimeInSeconds() {
+ // 10s ought to be enough for anybody.
+ return 10;
+}
+
+// Returns the number of threads of the current process or -1.
+int CountThreads() {
+ struct stat task_stat;
+ int task_d = stat("/proc/self/task", &task_stat);
+ // task_stat.st_nlink should be the number of tasks + 2 (accounting for
+ // "." and "..".
+ if (task_d != 0 || task_stat.st_nlink < 3)
+ return -1;
+ const int num_threads = task_stat.st_nlink - 2;
+ return num_threads;
+}
+
+} // namespace
+
+namespace sandbox {
+
+bool IsAndroid() {
+#if defined(OS_ANDROID)
+ return true;
+#else
+ return false;
+#endif
+}
+
+bool IsArchitectureArm() {
+#if defined(ARCH_CPU_ARM_FAMILY)
+ return true;
+#else
+ return false;
+#endif
+}
+
+// TODO(jln): figure out why base/.../dynamic_annotations.h's
+// RunningOnValgrind() cannot link.
+bool IsRunningOnValgrind() { return RUNNING_ON_VALGRIND; }
+
+static const int kExpectedValue = 42;
+static const int kIgnoreThisTest = 43;
+static const int kExitWithAssertionFailure = 1;
+static const int kExitForTimeout = 2;
+
+#if !defined(OS_ANDROID)
+// This is due to StackDumpSignalHandler() performing _exit(1).
+// TODO(jln): get rid of the collision with kExitWithAssertionFailure.
+const int kExitAfterSIGSEGV = 1;
+#endif
+
+static void SigAlrmHandler(int) {
+ const char failure_message[] = "Timeout reached!\n";
+ // Make sure that we never block here.
+ if (!fcntl(2, F_SETFL, O_NONBLOCK)) {
+ ignore_result(write(2, failure_message, sizeof(failure_message) - 1));
+ }
+ _exit(kExitForTimeout);
+}
+
+// Set a timeout with a handler that will automatically fail the
+// test.
+static void SetProcessTimeout(int time_in_seconds) {
+ struct sigaction act = {};
+ act.sa_handler = SigAlrmHandler;
+ SANDBOX_ASSERT(sigemptyset(&act.sa_mask) == 0);
+ act.sa_flags = 0;
+
+ struct sigaction old_act;
+ SANDBOX_ASSERT(sigaction(SIGALRM, &act, &old_act) == 0);
+
+ // We don't implemenet signal chaining, so make sure that nothing else
+ // is expecting to handle SIGALRM.
+ SANDBOX_ASSERT((old_act.sa_flags & SA_SIGINFO) == 0);
+ SANDBOX_ASSERT(old_act.sa_handler == SIG_DFL);
+ sigset_t sigalrm_set;
+ SANDBOX_ASSERT(sigemptyset(&sigalrm_set) == 0);
+ SANDBOX_ASSERT(sigaddset(&sigalrm_set, SIGALRM) == 0);
+ SANDBOX_ASSERT(sigprocmask(SIG_UNBLOCK, &sigalrm_set, NULL) == 0);
+ SANDBOX_ASSERT(alarm(time_in_seconds) == 0); // There should be no previous
+ // alarm.
+}
+
+// Runs a test in a sub-process. This is necessary for most of the code
+// in the BPF sandbox, as it potentially makes global state changes and as
+// it also tends to raise fatal errors, if the code has been used in an
+// insecure manner.
+void UnitTests::RunTestInProcess(SandboxTestRunner* test_runner,
+ DeathCheck death,
+ const void* death_aux) {
+ CHECK(test_runner);
+ // We need to fork(), so we can't be multi-threaded, as threads could hold
+ // locks.
+ int num_threads = CountThreads();
+#if !defined(THREAD_SANITIZER)
+ const int kNumExpectedThreads = 1;
+#else
+ // Under TSAN, there is a special helper thread. It should be completely
+ // invisible to our testing, so we ignore it. It should be ok to fork()
+ // with this thread. It's currently buggy, but it's the best we can do until
+ // there is a way to delay the start of the thread
+ // (https://code.google.com/p/thread-sanitizer/issues/detail?id=19).
+ const int kNumExpectedThreads = 2;
+#endif
+
+ // The kernel is at liberty to wake a thread id futex before updating /proc.
+ // If another test running in the same process has stopped a thread, it may
+ // appear as still running in /proc.
+ // We poll /proc, with an exponential back-off. At most, we'll sleep around
+ // 2^iterations nanoseconds in nanosleep().
+ for (unsigned int iteration = 0; iteration < 30; iteration++) {
+ struct timespec ts = {0, 1L << iteration /* nanoseconds */};
+ PCHECK(0 == HANDLE_EINTR(nanosleep(&ts, &ts)));
+ num_threads = CountThreads();
+ if (kNumExpectedThreads == num_threads)
+ break;
+ }
+
+ ASSERT_EQ(kNumExpectedThreads, num_threads)
+ << "Running sandbox tests with multiple threads "
+ << "is not supported and will make the tests flaky.";
+ int fds[2];
+ ASSERT_EQ(0, pipe(fds));
+ // Check that our pipe is not on one of the standard file descriptor.
+ SANDBOX_ASSERT(fds[0] > 2 && fds[1] > 2);
+
+ pid_t pid;
+ ASSERT_LE(0, (pid = fork()));
+ if (!pid) {
+ // In child process
+ // Redirect stderr to our pipe. This way, we can capture all error
+ // messages, if we decide we want to do so in our tests.
+ SANDBOX_ASSERT(dup2(fds[1], 2) == 2);
+ SANDBOX_ASSERT(!close(fds[0]));
+ SANDBOX_ASSERT(!close(fds[1]));
+
+ // Don't set a timeout if running on Valgrind, since it's generally much
+ // slower.
+ if (!IsRunningOnValgrind()) {
+ SetProcessTimeout(GetSubProcessTimeoutTimeInSeconds());
+ }
+
+ // Disable core files. They are not very useful for our individual test
+ // cases.
+ struct rlimit no_core = {0};
+ setrlimit(RLIMIT_CORE, &no_core);
+
+ test_runner->Run();
+ if (test_runner->ShouldCheckForLeaks()) {
+#if defined(LEAK_SANITIZER)
+ __lsan_do_leak_check();
+#endif
+ }
+ _exit(kExpectedValue);
+ }
+
+ close(fds[1]);
+ std::vector<char> msg_buf;
+ ssize_t rc;
+
+ // Make sure read() will never block as we'll use poll() to
+ // block with a timeout instead.
+ const int fcntl_ret = fcntl(fds[0], F_SETFL, O_NONBLOCK);
+ ASSERT_EQ(0, fcntl_ret);
+ struct pollfd poll_fd = {fds[0], POLLIN | POLLRDHUP, 0};
+
+ int poll_ret;
+ // We prefer the SIGALRM timeout to trigger in the child than this timeout
+ // so we double the common value here.
+ int poll_timeout = GetSubProcessTimeoutTimeInSeconds() * 2 * 1000;
+ while ((poll_ret = poll(&poll_fd, 1, poll_timeout) > 0)) {
+ const size_t kCapacity = 256;
+ const size_t len = msg_buf.size();
+ msg_buf.resize(len + kCapacity);
+ rc = HANDLE_EINTR(read(fds[0], &msg_buf[len], kCapacity));
+ msg_buf.resize(len + std::max(rc, static_cast<ssize_t>(0)));
+ if (rc <= 0)
+ break;
+ }
+ ASSERT_NE(poll_ret, -1) << "poll() failed";
+ ASSERT_NE(poll_ret, 0) << "Timeout while reading child state";
+ close(fds[0]);
+ std::string msg(msg_buf.begin(), msg_buf.end());
+
+ int status = 0;
+ int waitpid_returned = HANDLE_EINTR(waitpid(pid, &status, 0));
+ ASSERT_EQ(pid, waitpid_returned) << TestFailedMessage(msg);
+
+ // At run-time, we sometimes decide that a test shouldn't actually
+ // run (e.g. when testing sandbox features on a kernel that doesn't
+ // have sandboxing support). When that happens, don't attempt to
+ // call the "death" function, as it might be looking for a
+ // death-test condition that would never have triggered.
+ if (!WIFEXITED(status) || WEXITSTATUS(status) != kIgnoreThisTest ||
+ !msg.empty()) {
+ // We use gtest's ASSERT_XXX() macros instead of the DeathCheck
+ // functions. This means, on failure, "return" is called. This
+ // only works correctly, if the call of the "death" callback is
+ // the very last thing in our function.
+ death(status, msg, death_aux);
+ }
+}
+
+void UnitTests::DeathSuccess(int status, const std::string& msg, const void*) {
+ std::string details(TestFailedMessage(msg));
+
+ bool subprocess_terminated_normally = WIFEXITED(status);
+ ASSERT_TRUE(subprocess_terminated_normally) << details;
+ int subprocess_exit_status = WEXITSTATUS(status);
+ ASSERT_EQ(kExpectedValue, subprocess_exit_status) << details;
+ bool subprocess_exited_but_printed_messages = !msg.empty();
+ EXPECT_FALSE(subprocess_exited_but_printed_messages) << details;
+}
+
+void UnitTests::DeathSuccessAllowNoise(int status,
+ const std::string& msg,
+ const void*) {
+ std::string details(TestFailedMessage(msg));
+
+ bool subprocess_terminated_normally = WIFEXITED(status);
+ ASSERT_TRUE(subprocess_terminated_normally) << details;
+ int subprocess_exit_status = WEXITSTATUS(status);
+ ASSERT_EQ(kExpectedValue, subprocess_exit_status) << details;
+}
+
+void UnitTests::DeathMessage(int status,
+ const std::string& msg,
+ const void* aux) {
+ std::string details(TestFailedMessage(msg));
+ const char* expected_msg = static_cast<const char*>(aux);
+
+ bool subprocess_terminated_normally = WIFEXITED(status);
+ ASSERT_TRUE(subprocess_terminated_normally) << "Exit status: " << status
+ << " " << details;
+ int subprocess_exit_status = WEXITSTATUS(status);
+ ASSERT_EQ(1, subprocess_exit_status) << details;
+
+ bool subprocess_exited_without_matching_message =
+ msg.find(expected_msg) == std::string::npos;
+ EXPECT_FALSE(subprocess_exited_without_matching_message) << details;
+}
+
+void UnitTests::DeathSEGVMessage(int status,
+ const std::string& msg,
+ const void* aux) {
+ std::string details(TestFailedMessage(msg));
+ const char* expected_msg = static_cast<const char*>(aux);
+
+#if defined(OS_ANDROID)
+ const bool subprocess_got_sigsegv =
+ WIFSIGNALED(status) && (SIGSEGV == WTERMSIG(status));
+#else
+ const bool subprocess_got_sigsegv =
+ WIFEXITED(status) && (kExitAfterSIGSEGV == WEXITSTATUS(status));
+#endif
+
+ ASSERT_TRUE(subprocess_got_sigsegv) << "Exit status: " << status
+ << " " << details;
+
+ bool subprocess_exited_without_matching_message =
+ msg.find(expected_msg) == std::string::npos;
+ EXPECT_FALSE(subprocess_exited_without_matching_message) << details;
+}
+
+void UnitTests::DeathExitCode(int status,
+ const std::string& msg,
+ const void* aux) {
+ int expected_exit_code = static_cast<int>(reinterpret_cast<intptr_t>(aux));
+ std::string details(TestFailedMessage(msg));
+
+ bool subprocess_terminated_normally = WIFEXITED(status);
+ ASSERT_TRUE(subprocess_terminated_normally) << details;
+ int subprocess_exit_status = WEXITSTATUS(status);
+ ASSERT_EQ(expected_exit_code, subprocess_exit_status) << details;
+}
+
+void UnitTests::DeathBySignal(int status,
+ const std::string& msg,
+ const void* aux) {
+ int expected_signo = static_cast<int>(reinterpret_cast<intptr_t>(aux));
+ std::string details(TestFailedMessage(msg));
+
+ bool subprocess_terminated_by_signal = WIFSIGNALED(status);
+ ASSERT_TRUE(subprocess_terminated_by_signal) << details;
+ int subprocess_signal_number = WTERMSIG(status);
+ ASSERT_EQ(expected_signo, subprocess_signal_number) << details;
+}
+
+void UnitTests::AssertionFailure(const char* expr, const char* file, int line) {
+ fprintf(stderr, "%s:%d:%s", file, line, expr);
+ fflush(stderr);
+ _exit(kExitWithAssertionFailure);
+}
+
+void UnitTests::IgnoreThisTest() {
+ fflush(stderr);
+ _exit(kIgnoreThisTest);
+}
+
+} // namespace
« no previous file with comments | « sandbox/linux/tests/unit_tests.h ('k') | sandbox/linux/tests/unit_tests_unittest.cc » ('j') | no next file with comments »

Powered by Google App Engine
This is Rietveld 408576698