79 lines
2.6 KiB
C++
79 lines
2.6 KiB
C++
//===-- map_test.cpp --------------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "tests/scudo_unit_test.h"
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#include "common.h"
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#include <string.h>
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#include <unistd.h>
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static const char *MappingName = "scudo:test";
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TEST(ScudoMapTest, PageSize) {
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EXPECT_EQ(scudo::getPageSizeCached(),
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static_cast<scudo::uptr>(getpagesize()));
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}
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TEST(ScudoMapDeathTest, MapNoAccessUnmap) {
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const scudo::uptr Size = 4 * scudo::getPageSizeCached();
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scudo::MapPlatformData Data = {};
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void *P = scudo::map(nullptr, Size, MappingName, MAP_NOACCESS, &Data);
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EXPECT_NE(P, nullptr);
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EXPECT_DEATH(memset(P, 0xaa, Size), "");
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scudo::unmap(P, Size, UNMAP_ALL, &Data);
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}
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TEST(ScudoMapDeathTest, MapUnmap) {
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const scudo::uptr Size = 4 * scudo::getPageSizeCached();
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EXPECT_DEATH(
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{
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// Repeat few time to avoid missing crash if it's mmaped by unrelated
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// code.
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for (int i = 0; i < 10; ++i) {
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void *P = scudo::map(nullptr, Size, MappingName, 0, nullptr);
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if (!P)
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continue;
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scudo::unmap(P, Size, 0, nullptr);
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memset(P, 0xbb, Size);
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}
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},
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"");
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}
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TEST(ScudoMapDeathTest, MapWithGuardUnmap) {
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const scudo::uptr PageSize = scudo::getPageSizeCached();
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const scudo::uptr Size = 4 * PageSize;
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scudo::MapPlatformData Data = {};
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void *P = scudo::map(nullptr, Size + 2 * PageSize, MappingName, MAP_NOACCESS,
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&Data);
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EXPECT_NE(P, nullptr);
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void *Q =
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reinterpret_cast<void *>(reinterpret_cast<scudo::uptr>(P) + PageSize);
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EXPECT_EQ(scudo::map(Q, Size, MappingName, 0, &Data), Q);
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memset(Q, 0xaa, Size);
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EXPECT_DEATH(memset(Q, 0xaa, Size + 1), "");
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scudo::unmap(P, Size + 2 * PageSize, UNMAP_ALL, &Data);
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}
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TEST(ScudoMapTest, MapGrowUnmap) {
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const scudo::uptr PageSize = scudo::getPageSizeCached();
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const scudo::uptr Size = 4 * PageSize;
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scudo::MapPlatformData Data = {};
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void *P = scudo::map(nullptr, Size, MappingName, MAP_NOACCESS, &Data);
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EXPECT_NE(P, nullptr);
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void *Q =
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reinterpret_cast<void *>(reinterpret_cast<scudo::uptr>(P) + PageSize);
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EXPECT_EQ(scudo::map(Q, PageSize, MappingName, 0, &Data), Q);
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memset(Q, 0xaa, PageSize);
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Q = reinterpret_cast<void *>(reinterpret_cast<scudo::uptr>(Q) + PageSize);
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EXPECT_EQ(scudo::map(Q, PageSize, MappingName, 0, &Data), Q);
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memset(Q, 0xbb, PageSize);
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scudo::unmap(P, Size, UNMAP_ALL, &Data);
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}
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