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Diffstat (limited to 'test/syscalls/linux/memory_accounting.cc')
-rw-r--r-- | test/syscalls/linux/memory_accounting.cc | 99 |
1 files changed, 0 insertions, 99 deletions
diff --git a/test/syscalls/linux/memory_accounting.cc b/test/syscalls/linux/memory_accounting.cc deleted file mode 100644 index a6e20f9c3..000000000 --- a/test/syscalls/linux/memory_accounting.cc +++ /dev/null @@ -1,99 +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/mman.h> -#include <map> - -#include "gtest/gtest.h" -#include "gtest/gtest.h" -#include "absl/strings/match.h" -#include "absl/strings/numbers.h" -#include "absl/strings/str_format.h" -#include "absl/strings/str_split.h" -#include "test/util/fs_util.h" -#include "test/util/posix_error.h" -#include "test/util/test_util.h" - -namespace gvisor { -namespace testing { -namespace { - -using ::absl::StrFormat; - -// AnonUsageFromMeminfo scrapes the current anonymous memory usage from -// /proc/meminfo and returns it in bytes. -PosixErrorOr<uint64_t> AnonUsageFromMeminfo() { - ASSIGN_OR_RETURN_ERRNO(auto meminfo, GetContents("/proc/meminfo")); - std::vector<std::string> lines(absl::StrSplit(meminfo, '\n')); - - // Try to find AnonPages line, the format is AnonPages:\\s+(\\d+) kB\n. - for (const auto& line : lines) { - if (!absl::StartsWith(line, "AnonPages:")) { - continue; - } - - std::vector<std::string> parts( - absl::StrSplit(line, ' ', absl::SkipEmpty())); - if (parts.size() == 3) { - // The size is the second field, let's try to parse it as a number. - ASSIGN_OR_RETURN_ERRNO(auto anon_kb, Atoi<uint64_t>(parts[1])); - return anon_kb * 1024; - } - - return PosixError(EINVAL, "AnonPages field in /proc/meminfo was malformed"); - } - - return PosixError(EINVAL, "AnonPages field not found in /proc/meminfo"); -} - -TEST(MemoryAccounting, AnonAccountingPreservedOnSaveRestore) { - // This test isn't meaningful on Linux. /proc/meminfo reports system-wide - // memory usage, which can change arbitrarily in Linux from other activity on - // the machine. In gvisor, this test is the only thing running on the - // "machine", so values in /proc/meminfo accurately reflect the memory used by - // the test. - SKIP_IF(!IsRunningOnGvisor()); - - uint64_t anon_initial = ASSERT_NO_ERRNO_AND_VALUE(AnonUsageFromMeminfo()); - - // Cause some anonymous memory usage. - uint64_t map_bytes = Megabytes(512); - char* mem = - static_cast<char*>(mmap(nullptr, map_bytes, PROT_READ | PROT_WRITE, - MAP_POPULATE | MAP_ANON | MAP_PRIVATE, -1, 0)); - ASSERT_NE(mem, MAP_FAILED) - << "Map failed, errno: " << errno << " (" << strerror(errno) << ")."; - - // Write something to each page to prevent them from being decommited on - // S/R. Zero pages are dropped on save. - for (uint64_t i = 0; i < map_bytes; i += kPageSize) { - mem[i] = 'a'; - } - - uint64_t anon_after_alloc = ASSERT_NO_ERRNO_AND_VALUE(AnonUsageFromMeminfo()); - EXPECT_THAT(anon_after_alloc, - EquivalentWithin(anon_initial + map_bytes, 0.03)); - - // We have many implicit S/R cycles from scraping /proc/meminfo throughout the - // test, but throw an explicit S/R in here as well. - MaybeSave(); - - // Usage should remain the same across S/R. - uint64_t anon_after_sr = ASSERT_NO_ERRNO_AND_VALUE(AnonUsageFromMeminfo()); - EXPECT_THAT(anon_after_sr, EquivalentWithin(anon_after_alloc, 0.03)); -} - -} // namespace -} // namespace testing -} // namespace gvisor |