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//===-- 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 = {};
void *P = map(nullptr, Size, "ResidentMemorySize", 0, &Data);
ASSERT_NE(nullptr, P);
EXPECT_LT(getResidentMemorySize(), OnStart + Threshold);
memset(P, 1, Size);
EXPECT_GT(getResidentMemorySize(), OnStart + Size - Threshold);
releasePagesToOS((uptr)P, 0, Size, &Data);
EXPECT_LT(getResidentMemorySize(), OnStart + Threshold);
memset(P, 1, Size);
EXPECT_GT(getResidentMemorySize(), OnStart + Size - Threshold);
unmap(P, Size, 0, &Data);
}
TEST(ScudoCommonTest, Zeros) {
const uptr Size = 1ull << 20;
MapPlatformData Data = {};
uptr *P = reinterpret_cast<uptr *>(map(nullptr, Size, "Zeros", 0, &Data));
const ptrdiff_t N = Size / sizeof(*P);
ASSERT_NE(nullptr, P);
EXPECT_EQ(std::count(P, P + N, 0), N);
memset(P, 1, Size);
EXPECT_EQ(std::count(P, P + N, 0), 0);
releasePagesToOS((uptr)P, 0, Size, &Data);
EXPECT_EQ(std::count(P, P + N, 0), N);
unmap(P, Size, 0, &Data);
}
} // namespace scudo
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