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-rw-r--r--test/util/test_util.cc225
1 files changed, 0 insertions, 225 deletions
diff --git a/test/util/test_util.cc b/test/util/test_util.cc
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--- a/test/util/test_util.cc
+++ /dev/null
@@ -1,225 +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 "test/util/test_util.h"
-
-#include <limits.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <sys/uio.h>
-#include <sys/utsname.h>
-#include <unistd.h>
-
-#include <ctime>
-#include <iostream>
-#include <vector>
-
-#include "absl/base/attributes.h"
-#include "absl/flags/flag.h" // IWYU pragma: keep
-#include "absl/flags/parse.h" // IWYU pragma: keep
-#include "absl/strings/numbers.h"
-#include "absl/strings/str_cat.h"
-#include "absl/strings/str_split.h"
-#include "absl/time/time.h"
-#include "test/util/fs_util.h"
-#include "test/util/posix_error.h"
-
-namespace gvisor {
-namespace testing {
-
-#define TEST_ON_GVISOR "TEST_ON_GVISOR"
-
-bool IsRunningOnGvisor() { return GvisorPlatform() != Platform::kNative; }
-
-Platform GvisorPlatform() {
- // Set by runner.go.
- char* env = getenv(TEST_ON_GVISOR);
- if (!env) {
- return Platform::kNative;
- }
- if (strcmp(env, "ptrace") == 0) {
- return Platform::kPtrace;
- }
- if (strcmp(env, "kvm") == 0) {
- return Platform::kKVM;
- }
- std::cerr << "unknown platform " << env;
- abort();
-}
-
-// Inline cpuid instruction. Preserve %ebx/%rbx register. In PIC compilations
-// %ebx contains the address of the global offset table. %rbx is occasionally
-// used to address stack variables in presence of dynamic allocas.
-#if defined(__x86_64__)
-#define GETCPUID(a, b, c, d, a_inp, c_inp) \
- asm("mov %%rbx, %%rdi\n" \
- "cpuid\n" \
- "xchg %%rdi, %%rbx\n" \
- : "=a"(a), "=D"(b), "=c"(c), "=d"(d) \
- : "a"(a_inp), "2"(c_inp))
-#endif // defined(__x86_64__)
-
-CPUVendor GetCPUVendor() {
- uint32_t eax, ebx, ecx, edx;
- std::string vendor_str;
- // Get vendor string (issue CPUID with eax = 0)
- GETCPUID(eax, ebx, ecx, edx, 0, 0);
- vendor_str.append(reinterpret_cast<char*>(&ebx), 4);
- vendor_str.append(reinterpret_cast<char*>(&edx), 4);
- vendor_str.append(reinterpret_cast<char*>(&ecx), 4);
- if (vendor_str == "GenuineIntel") {
- return CPUVendor::kIntel;
- } else if (vendor_str == "AuthenticAMD") {
- return CPUVendor::kAMD;
- }
- return CPUVendor::kUnknownVendor;
-}
-
-bool operator==(const KernelVersion& first, const KernelVersion& second) {
- return first.major == second.major && first.minor == second.minor &&
- first.micro == second.micro;
-}
-
-PosixErrorOr<KernelVersion> ParseKernelVersion(absl::string_view vers_str) {
- KernelVersion version = {};
- std::vector<std::string> values =
- absl::StrSplit(vers_str, absl::ByAnyChar(".-"));
- if (values.size() == 2) {
- ASSIGN_OR_RETURN_ERRNO(version.major, Atoi<int>(values[0]));
- ASSIGN_OR_RETURN_ERRNO(version.minor, Atoi<int>(values[1]));
- return version;
- } else if (values.size() >= 3) {
- ASSIGN_OR_RETURN_ERRNO(version.major, Atoi<int>(values[0]));
- ASSIGN_OR_RETURN_ERRNO(version.minor, Atoi<int>(values[1]));
- ASSIGN_OR_RETURN_ERRNO(version.micro, Atoi<int>(values[2]));
- return version;
- }
- return PosixError(EINVAL, absl::StrCat("Unknown kernel release: ", vers_str));
-}
-
-PosixErrorOr<KernelVersion> GetKernelVersion() {
- utsname buf;
- RETURN_ERROR_IF_SYSCALL_FAIL(uname(&buf));
- return ParseKernelVersion(buf.release);
-}
-
-std::string CPUSetToString(const cpu_set_t& set, size_t cpus) {
- std::string str = "cpuset[";
- for (unsigned int n = 0; n < cpus; n++) {
- if (CPU_ISSET(n, &set)) {
- if (n != 0) {
- absl::StrAppend(&str, " ");
- }
- absl::StrAppend(&str, n);
- }
- }
- absl::StrAppend(&str, "]");
- return str;
-}
-
-// An overloaded operator<< makes it easy to dump the value of an OpenFd.
-std::ostream& operator<<(std::ostream& out, OpenFd const& ofd) {
- out << ofd.fd << " -> " << ofd.link;
- return out;
-}
-
-// An overloaded operator<< makes it easy to dump a vector of OpenFDs.
-std::ostream& operator<<(std::ostream& out, std::vector<OpenFd> const& v) {
- for (const auto& ofd : v) {
- out << ofd << std::endl;
- }
- return out;
-}
-
-PosixErrorOr<std::vector<OpenFd>> GetOpenFDs() {
- // Get the results from /proc/self/fd.
- ASSIGN_OR_RETURN_ERRNO(auto dir_list,
- ListDir("/proc/self/fd", /*skipdots=*/true));
-
- std::vector<OpenFd> ret_fds;
- for (const auto& str_fd : dir_list) {
- OpenFd open_fd = {};
- ASSIGN_OR_RETURN_ERRNO(open_fd.fd, Atoi<int>(str_fd));
- std::string path = absl::StrCat("/proc/self/fd/", open_fd.fd);
-
- // Resolve the link.
- char buf[PATH_MAX] = {};
- int ret = readlink(path.c_str(), buf, sizeof(buf));
- if (ret < 0) {
- if (errno == ENOENT) {
- // The FD may have been closed, let's be resilient.
- continue;
- }
-
- return PosixError(
- errno, absl::StrCat("readlink of ", path, " returned errno ", errno));
- }
- open_fd.link = std::string(buf, ret);
- ret_fds.emplace_back(std::move(open_fd));
- }
- return ret_fds;
-}
-
-PosixErrorOr<uint64_t> Links(const std::string& path) {
- struct stat st;
- if (stat(path.c_str(), &st)) {
- return PosixError(errno, absl::StrCat("Failed to stat ", path));
- }
- return static_cast<uint64_t>(st.st_nlink);
-}
-
-void RandomizeBuffer(void* buffer, size_t len) {
- struct timespec ts = {};
- clock_gettime(CLOCK_MONOTONIC, &ts);
- uint32_t seed = static_cast<uint32_t>(ts.tv_nsec);
- char* const buf = static_cast<char*>(buffer);
- for (size_t i = 0; i < len; i++) {
- buf[i] = rand_r(&seed) % 255;
- }
-}
-
-std::vector<std::vector<struct iovec>> GenerateIovecs(uint64_t total_size,
- void* buf,
- size_t buflen) {
- std::vector<std::vector<struct iovec>> result;
- for (uint64_t offset = 0; offset < total_size;) {
- auto& iovec_array = *result.emplace(result.end());
-
- for (; offset < total_size && iovec_array.size() < IOV_MAX;
- offset += buflen) {
- struct iovec iov = {};
- iov.iov_base = buf;
- iov.iov_len = std::min<uint64_t>(total_size - offset, buflen);
- iovec_array.push_back(iov);
- }
- }
-
- return result;
-}
-
-uint64_t Megabytes(uint64_t n) {
- // Overflow check, upper 20 bits in n shouldn't be set.
- TEST_CHECK(!(0xfffff00000000000 & n));
- return n << 20;
-}
-
-bool Equivalent(uint64_t current, uint64_t target, double tolerance) {
- auto abs_diff = target > current ? target - current : current - target;
- return abs_diff <= static_cast<uint64_t>(tolerance * target);
-}
-
-} // namespace testing
-} // namespace gvisor
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