0f86336b69
-- 0b924fe4e9871200792617329d32beb8356daa9b by Derek Mauro <dmauro@google.com>: Use less threads in the GetTID() test to avoid test timeouts PiperOrigin-RevId: 292566826 -- 0b519c4fd48d61b7c4ea94ed6a6be6e981b9c51a by Abseil Team <absl-team@google.com>: Internal change. PiperOrigin-RevId: 292563778 -- 3204f6e07bcc2b5e9098d45f1a20998f25ab808e by Abseil Team <absl-team@google.com>: Internal change. PiperOrigin-RevId: 292550551 -- 09fbbe73833478d3f26f3e33c8291b991fd3be51 by Derek Mauro <dmauro@google.com>: Add a debug bounds-check to absl::string_view::operator[] string_view accesses that are out-of-bounds are undefined behavior: https://en.cppreference.com/w/cpp/string/basic_string_view/operator_at This change causes code to abort in debug mode, indicating a bug and possibly a security issue like a buffer overflow. Code broken by this change should be investigated. PiperOrigin-RevId: 292544735 -- bf2c19cb45682628f963d4067c0cd6deed7e656d by Derek Mauro <dmauro@google.com>: Add debug assertions to absl::string_view::front and absl::string_view::back Calling front() or back() on an empty string_view is undefined behavior. This assertion is to help catch broken code. https://en.cppreference.com/w/cpp/string/basic_string_view/front https://en.cppreference.com/w/cpp/string/basic_string_view/back PiperOrigin-RevId: 292453255 -- 47f573679b322f8c0fd2cb037cc87e7bc822ac6b by Xiaoyi Zhang <zhangxy@google.com>: Release functional/CMakeList.txt. PiperOrigin-RevId: 292417025 GitOrigin-RevId: 0b924fe4e9871200792617329d32beb8356daa9b Change-Id: Ie6980fb1ac351d72a2ce4468f25bd31db396f88a
100 lines
3 KiB
C++
100 lines
3 KiB
C++
// Copyright 2017 The Abseil 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
|
|
//
|
|
// https://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 "absl/base/internal/sysinfo.h"
|
|
|
|
#ifndef _WIN32
|
|
#include <sys/types.h>
|
|
#include <unistd.h>
|
|
#endif
|
|
|
|
#include <thread> // NOLINT(build/c++11)
|
|
#include <unordered_set>
|
|
#include <vector>
|
|
|
|
#include "gtest/gtest.h"
|
|
#include "absl/synchronization/barrier.h"
|
|
#include "absl/synchronization/mutex.h"
|
|
|
|
namespace absl {
|
|
ABSL_NAMESPACE_BEGIN
|
|
namespace base_internal {
|
|
namespace {
|
|
|
|
TEST(SysinfoTest, NumCPUs) {
|
|
EXPECT_NE(NumCPUs(), 0)
|
|
<< "NumCPUs() should not have the default value of 0";
|
|
}
|
|
|
|
TEST(SysinfoTest, NominalCPUFrequency) {
|
|
#if !(defined(__aarch64__) && defined(__linux__)) && !defined(__EMSCRIPTEN__)
|
|
EXPECT_GE(NominalCPUFrequency(), 1000.0)
|
|
<< "NominalCPUFrequency() did not return a reasonable value";
|
|
#else
|
|
// Aarch64 cannot read the CPU frequency from sysfs, so we get back 1.0.
|
|
// Emscripten does not have a sysfs to read from at all.
|
|
EXPECT_EQ(NominalCPUFrequency(), 1.0)
|
|
<< "CPU frequency detection was fixed! Please update unittest.";
|
|
#endif
|
|
}
|
|
|
|
TEST(SysinfoTest, GetTID) {
|
|
EXPECT_EQ(GetTID(), GetTID()); // Basic compile and equality test.
|
|
#ifdef __native_client__
|
|
// Native Client has a race condition bug that leads to memory
|
|
// exaustion when repeatedly creating and joining threads.
|
|
// https://bugs.chromium.org/p/nativeclient/issues/detail?id=1027
|
|
return;
|
|
#endif
|
|
// Test that TIDs are unique to each thread.
|
|
// Uses a few loops to exercise implementations that reallocate IDs.
|
|
for (int i = 0; i < 10; ++i) {
|
|
constexpr int kNumThreads = 10;
|
|
Barrier all_threads_done(kNumThreads);
|
|
std::vector<std::thread> threads;
|
|
|
|
Mutex mutex;
|
|
std::unordered_set<pid_t> tids;
|
|
|
|
for (int j = 0; j < kNumThreads; ++j) {
|
|
threads.push_back(std::thread([&]() {
|
|
pid_t id = GetTID();
|
|
{
|
|
MutexLock lock(&mutex);
|
|
ASSERT_TRUE(tids.find(id) == tids.end());
|
|
tids.insert(id);
|
|
}
|
|
// We can't simply join the threads here. The threads need to
|
|
// be alive otherwise the TID might have been reallocated to
|
|
// another live thread.
|
|
all_threads_done.Block();
|
|
}));
|
|
}
|
|
for (auto& thread : threads) {
|
|
thread.join();
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifdef __linux__
|
|
TEST(SysinfoTest, LinuxGetTID) {
|
|
// On Linux, for the main thread, GetTID()==getpid() is guaranteed by the API.
|
|
EXPECT_EQ(GetTID(), getpid());
|
|
}
|
|
#endif
|
|
|
|
} // namespace
|
|
} // namespace base_internal
|
|
ABSL_NAMESPACE_END
|
|
} // namespace absl
|