| //===-- common_test.cpp -----------------------------------------*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "internal_defs.h" |
| #include "tests/scudo_unit_test.h" |
| |
| #include "common.h" |
| #include <algorithm> |
| #include <fstream> |
| |
| namespace scudo { |
| |
| static uptr getResidentMemorySize() { |
| if (!SCUDO_LINUX) |
| UNREACHABLE("Not implemented!"); |
| uptr Size; |
| uptr Resident; |
| std::ifstream IFS("/proc/self/statm"); |
| IFS >> Size; |
| IFS >> Resident; |
| return Resident * getPageSizeCached(); |
| } |
| |
| // Fuchsia needs getResidentMemorySize implementation. |
| TEST(ScudoCommonTest, SKIP_ON_FUCHSIA(ResidentMemorySize)) { |
| uptr OnStart = getResidentMemorySize(); |
| EXPECT_GT(OnStart, 0UL); |
| |
| const uptr Size = 1ull << 30; |
| const uptr Threshold = Size >> 3; |
| |
| MapPlatformData Data = {}; |
| uptr *P = reinterpret_cast<uptr *>( |
| map(nullptr, Size, "ResidentMemorySize", 0, &Data)); |
| const ptrdiff_t N = Size / sizeof(*P); |
| ASSERT_NE(nullptr, P); |
| EXPECT_LT(getResidentMemorySize() - OnStart, Threshold); |
| EXPECT_EQ(std::count(P, P + N, 0), N); |
| |
| memset(P, 1, Size); |
| EXPECT_EQ(std::count(P, P + N, 0), 0); |
| EXPECT_GT(getResidentMemorySize() - OnStart, Size - Threshold); |
| |
| releasePagesToOS((uptr)P, 0, Size, &Data); |
| EXPECT_EQ(std::count(P, P + N, 0), N); |
| // FIXME: does not work with QEMU-user. |
| // EXPECT_LT(getResidentMemorySize() - OnStart, Threshold); |
| |
| memset(P, 1, Size); |
| EXPECT_EQ(std::count(P, P + N, 0), 0); |
| EXPECT_GT(getResidentMemorySize() - OnStart, Size - Threshold); |
| |
| unmap(P, Size, 0, &Data); |
| } |
| |
| } // namespace scudo |