Linux Sandbox: add resource limits to NaCl

sandbox/linux/services/resource_limits_unittests.cc

+// Copyright 2015 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 "sandbox/linux/services/resource_limits.h"
+
+#include <errno.h>
+#include <sys/resource.h>
+#include <sys/time.h>
+#include <unistd.h>
+
+#include "base/logging.h"
+#include "sandbox/linux/tests/test_utils.h"
+#include "sandbox/linux/tests/unit_tests.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace sandbox {
+
+namespace {
+
+// Not being able to fork breaks LSAN, so disable on

[Mark Seaborn, 2015/02/13 17:11:54]

LSAN -> LeakSanitizer perhaps.  (Mentioning LSAN and then ASAN looks like it
could be a typo if you don't know how they relate.)

[jln (very slow on Chromium), 2015/02/13 18:00:06]

Done.

+// all ASAN builds.
+SANDBOX_TEST(ResourceLimits, DISABLE_ON_ASAN(NoFork)) {
+  // Make sure that fork will fail with EAGAIN.
+  SANDBOX_ASSERT(ResourceLimits::Lower(RLIMIT_NPROC, 0));
+  errno = 0;
+  pid_t pid = fork();
+  // Reap any child if fork succeeded.
+  TestUtils::HandlePostForkReturn(pid);
+  SANDBOX_ASSERT_EQ(-1, pid);
+  CHECK_EQ(EAGAIN, errno);
+}
+
+}  // namespace
+
+}  // namespace sandbox