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llvm-project/compiler-rt/lib/scudo/standalone/tests/combined_test.cpp

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//===-- combined_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 "memtag.h"
#include "tests/scudo_unit_test.h"
#include "allocator_config.h"
#include "combined.h"
#include <condition_variable>
#include <memory>
#include <mutex>
#include <set>
#include <stdlib.h>
#include <thread>
#include <vector>
static constexpr scudo::Chunk::Origin Origin = scudo::Chunk::Origin::Malloc;
static constexpr scudo::uptr MinAlignLog = FIRST_32_SECOND_64(3U, 4U);
// Fuchsia complains that the function is not used.
UNUSED static void disableDebuggerdMaybe() {
#if SCUDO_ANDROID
// Disable the debuggerd signal handler on Android, without this we can end
// up spending a significant amount of time creating tombstones.
signal(SIGSEGV, SIG_DFL);
#endif
}
template <class AllocatorT>
bool isPrimaryAllocation(scudo::uptr Size, scudo::uptr Alignment) {
const scudo::uptr MinAlignment = 1UL << SCUDO_MIN_ALIGNMENT_LOG;
if (Alignment < MinAlignment)
Alignment = MinAlignment;
const scudo::uptr NeededSize =
scudo::roundUpTo(Size, MinAlignment) +
((Alignment > MinAlignment) ? Alignment : scudo::Chunk::getHeaderSize());
return AllocatorT::PrimaryT::canAllocate(NeededSize);
}
template <class AllocatorT>
void checkMemoryTaggingMaybe(AllocatorT *Allocator, void *P, scudo::uptr Size,
scudo::uptr Alignment) {
const scudo::uptr MinAlignment = 1UL << SCUDO_MIN_ALIGNMENT_LOG;
Size = scudo::roundUpTo(Size, MinAlignment);
if (Allocator->useMemoryTaggingTestOnly())
EXPECT_DEATH(
{
disableDebuggerdMaybe();
reinterpret_cast<char *>(P)[-1] = 0xaa;
},
"");
if (isPrimaryAllocation<AllocatorT>(Size, Alignment)
? Allocator->useMemoryTaggingTestOnly()
: Alignment == MinAlignment) {
EXPECT_DEATH(
{
disableDebuggerdMaybe();
reinterpret_cast<char *>(P)[Size] = 0xaa;
},
"");
}
}
template <typename Config> struct TestAllocator : scudo::Allocator<Config> {
TestAllocator() {
this->initThreadMaybe();
if (scudo::archSupportsMemoryTagging() &&
!scudo::systemDetectsMemoryTagFaultsTestOnly())
this->disableMemoryTagging();
}
~TestAllocator() { this->unmapTestOnly(); }
void *operator new(size_t size) {
void *p = nullptr;
EXPECT_EQ(0, posix_memalign(&p, alignof(TestAllocator), size));
return p;
}
void operator delete(void *ptr) { free(ptr); }
};
template <class TypeParam> struct ScudoCombinedTest : public Test {
ScudoCombinedTest() {
UseQuarantine = std::is_same<TypeParam, scudo::AndroidConfig>::value;
Allocator = std::make_unique<AllocatorT>();
}
~ScudoCombinedTest() {
Allocator->releaseToOS();
UseQuarantine = true;
}
void RunTest();
void BasicTest(scudo::uptr SizeLog);
using AllocatorT = TestAllocator<TypeParam>;
std::unique_ptr<AllocatorT> Allocator;
};
template <typename T> using ScudoCombinedDeathTest = ScudoCombinedTest<T>;
#if SCUDO_FUCHSIA
#define SCUDO_TYPED_TEST_ALL_TYPES(FIXTURE, NAME) \
SCUDO_TYPED_TEST_TYPE(FIXTURE, NAME, AndroidSvelteConfig) \
SCUDO_TYPED_TEST_TYPE(FIXTURE, NAME, FuchsiaConfig)
#else
#define SCUDO_TYPED_TEST_ALL_TYPES(FIXTURE, NAME) \
SCUDO_TYPED_TEST_TYPE(FIXTURE, NAME, AndroidSvelteConfig) \
SCUDO_TYPED_TEST_TYPE(FIXTURE, NAME, DefaultConfig) \
SCUDO_TYPED_TEST_TYPE(FIXTURE, NAME, AndroidConfig)
#endif
#define SCUDO_TYPED_TEST_TYPE(FIXTURE, NAME, TYPE) \
using FIXTURE##NAME##_##TYPE = FIXTURE##NAME<scudo::TYPE>; \
TEST_F(FIXTURE##NAME##_##TYPE, NAME) { Run(); }
#define SCUDO_TYPED_TEST(FIXTURE, NAME) \
template <class TypeParam> \
struct FIXTURE##NAME : public FIXTURE<TypeParam> { \
void Run(); \
}; \
SCUDO_TYPED_TEST_ALL_TYPES(FIXTURE, NAME) \
template <class TypeParam> void FIXTURE##NAME<TypeParam>::Run()
SCUDO_TYPED_TEST(ScudoCombinedTest, IsOwned) {
auto *Allocator = this->Allocator.get();
static scudo::u8 StaticBuffer[scudo::Chunk::getHeaderSize() + 1];
EXPECT_FALSE(
Allocator->isOwned(&StaticBuffer[scudo::Chunk::getHeaderSize()]));
scudo::u8 StackBuffer[scudo::Chunk::getHeaderSize() + 1];
for (scudo::uptr I = 0; I < sizeof(StackBuffer); I++)
StackBuffer[I] = 0x42U;
EXPECT_FALSE(Allocator->isOwned(&StackBuffer[scudo::Chunk::getHeaderSize()]));
for (scudo::uptr I = 0; I < sizeof(StackBuffer); I++)
EXPECT_EQ(StackBuffer[I], 0x42U);
}
template <class Config>
void ScudoCombinedTest<Config>::BasicTest(scudo::uptr SizeLog) {
auto *Allocator = this->Allocator.get();
// This allocates and deallocates a bunch of chunks, with a wide range of
// sizes and alignments, with a focus on sizes that could trigger weird
// behaviors (plus or minus a small delta of a power of two for example).
for (scudo::uptr AlignLog = MinAlignLog; AlignLog <= 16U; AlignLog++) {
const scudo::uptr Align = 1U << AlignLog;
for (scudo::sptr Delta = -32; Delta <= 32; Delta++) {
if (static_cast<scudo::sptr>(1U << SizeLog) + Delta <= 0)
continue;
const scudo::uptr Size = (1U << SizeLog) + Delta;
void *P = Allocator->allocate(Size, Origin, Align);
EXPECT_NE(P, nullptr);
EXPECT_TRUE(Allocator->isOwned(P));
EXPECT_TRUE(scudo::isAligned(reinterpret_cast<scudo::uptr>(P), Align));
EXPECT_LE(Size, Allocator->getUsableSize(P));
memset(P, 0xaa, Size);
checkMemoryTaggingMaybe(Allocator, P, Size, Align);
Allocator->deallocate(P, Origin, Size);
}
}
}
#define SCUDO_MAKE_BASIC_TEST(SizeLog) \
SCUDO_TYPED_TEST(ScudoCombinedDeathTest, BasicCombined##SizeLog) { \
this->BasicTest(SizeLog); \
}
SCUDO_MAKE_BASIC_TEST(0)
SCUDO_MAKE_BASIC_TEST(1)
SCUDO_MAKE_BASIC_TEST(2)
SCUDO_MAKE_BASIC_TEST(3)
SCUDO_MAKE_BASIC_TEST(4)
SCUDO_MAKE_BASIC_TEST(5)
SCUDO_MAKE_BASIC_TEST(6)
SCUDO_MAKE_BASIC_TEST(7)
SCUDO_MAKE_BASIC_TEST(8)
SCUDO_MAKE_BASIC_TEST(9)
SCUDO_MAKE_BASIC_TEST(10)
SCUDO_MAKE_BASIC_TEST(11)
SCUDO_MAKE_BASIC_TEST(12)
SCUDO_MAKE_BASIC_TEST(13)
SCUDO_MAKE_BASIC_TEST(14)
SCUDO_MAKE_BASIC_TEST(15)
SCUDO_MAKE_BASIC_TEST(16)
SCUDO_MAKE_BASIC_TEST(17)
SCUDO_MAKE_BASIC_TEST(18)
SCUDO_MAKE_BASIC_TEST(19)
SCUDO_MAKE_BASIC_TEST(20)
SCUDO_TYPED_TEST(ScudoCombinedTest, ZeroContents) {
auto *Allocator = this->Allocator.get();
// Ensure that specifying ZeroContents returns a zero'd out block.
for (scudo::uptr SizeLog = 0U; SizeLog <= 20U; SizeLog++) {
for (scudo::uptr Delta = 0U; Delta <= 4U; Delta++) {
const scudo::uptr Size = (1U << SizeLog) + Delta * 128U;
void *P = Allocator->allocate(Size, Origin, 1U << MinAlignLog, true);
EXPECT_NE(P, nullptr);
for (scudo::uptr I = 0; I < Size; I++)
ASSERT_EQ((reinterpret_cast<char *>(P))[I], 0);
memset(P, 0xaa, Size);
Allocator->deallocate(P, Origin, Size);
}
}
}
SCUDO_TYPED_TEST(ScudoCombinedTest, ZeroFill) {
auto *Allocator = this->Allocator.get();
// Ensure that specifying ZeroFill returns a zero'd out block.
Allocator->setFillContents(scudo::ZeroFill);
for (scudo::uptr SizeLog = 0U; SizeLog <= 20U; SizeLog++) {
for (scudo::uptr Delta = 0U; Delta <= 4U; Delta++) {
const scudo::uptr Size = (1U << SizeLog) + Delta * 128U;
void *P = Allocator->allocate(Size, Origin, 1U << MinAlignLog, false);
EXPECT_NE(P, nullptr);
for (scudo::uptr I = 0; I < Size; I++)
ASSERT_EQ((reinterpret_cast<char *>(P))[I], 0);
memset(P, 0xaa, Size);
Allocator->deallocate(P, Origin, Size);
}
}
}
SCUDO_TYPED_TEST(ScudoCombinedTest, PatternOrZeroFill) {
auto *Allocator = this->Allocator.get();
// Ensure that specifying PatternOrZeroFill returns a pattern or zero filled
// block. The primary allocator only produces pattern filled blocks if MTE
// is disabled, so we only require pattern filled blocks in that case.
Allocator->setFillContents(scudo::PatternOrZeroFill);
for (scudo::uptr SizeLog = 0U; SizeLog <= 20U; SizeLog++) {
for (scudo::uptr Delta = 0U; Delta <= 4U; Delta++) {
const scudo::uptr Size = (1U << SizeLog) + Delta * 128U;
void *P = Allocator->allocate(Size, Origin, 1U << MinAlignLog, false);
EXPECT_NE(P, nullptr);
for (scudo::uptr I = 0; I < Size; I++) {
unsigned char V = (reinterpret_cast<unsigned char *>(P))[I];
if (isPrimaryAllocation<TestAllocator<TypeParam>>(Size,
1U << MinAlignLog) &&
!Allocator->useMemoryTaggingTestOnly())
ASSERT_EQ(V, scudo::PatternFillByte);
else
ASSERT_TRUE(V == scudo::PatternFillByte || V == 0);
}
memset(P, 0xaa, Size);
Allocator->deallocate(P, Origin, Size);
}
}
}
SCUDO_TYPED_TEST(ScudoCombinedTest, BlockReuse) {
auto *Allocator = this->Allocator.get();
// Verify that a chunk will end up being reused, at some point.
const scudo::uptr NeedleSize = 1024U;
void *NeedleP = Allocator->allocate(NeedleSize, Origin);
Allocator->deallocate(NeedleP, Origin);
bool Found = false;
for (scudo::uptr I = 0; I < 1024U && !Found; I++) {
void *P = Allocator->allocate(NeedleSize, Origin);
if (Allocator->getHeaderTaggedPointer(P) ==
Allocator->getHeaderTaggedPointer(NeedleP))
Found = true;
Allocator->deallocate(P, Origin);
}
EXPECT_TRUE(Found);
}
SCUDO_TYPED_TEST(ScudoCombinedTest, ReallocateLargeIncreasing) {
auto *Allocator = this->Allocator.get();
// Reallocate a chunk all the way up to a secondary allocation, verifying that
// we preserve the data in the process.
scudo::uptr Size = 16;
void *P = Allocator->allocate(Size, Origin);
const char Marker = 0xab;
memset(P, Marker, Size);
while (Size < TypeParam::Primary::SizeClassMap::MaxSize * 4) {
void *NewP = Allocator->reallocate(P, Size * 2);
EXPECT_NE(NewP, nullptr);
for (scudo::uptr J = 0; J < Size; J++)
EXPECT_EQ((reinterpret_cast<char *>(NewP))[J], Marker);
memset(reinterpret_cast<char *>(NewP) + Size, Marker, Size);
Size *= 2U;
P = NewP;
}
Allocator->deallocate(P, Origin);
}
SCUDO_TYPED_TEST(ScudoCombinedTest, ReallocateLargeDecreasing) {
auto *Allocator = this->Allocator.get();
// Reallocate a large chunk all the way down to a byte, verifying that we
// preserve the data in the process.
scudo::uptr Size = TypeParam::Primary::SizeClassMap::MaxSize * 2;
const scudo::uptr DataSize = 2048U;
void *P = Allocator->allocate(Size, Origin);
const char Marker = 0xab;
memset(P, Marker, scudo::Min(Size, DataSize));
while (Size > 1U) {
Size /= 2U;
void *NewP = Allocator->reallocate(P, Size);
EXPECT_NE(NewP, nullptr);
for (scudo::uptr J = 0; J < scudo::Min(Size, DataSize); J++)
EXPECT_EQ((reinterpret_cast<char *>(NewP))[J], Marker);
P = NewP;
}
Allocator->deallocate(P, Origin);
}
SCUDO_TYPED_TEST(ScudoCombinedDeathTest, ReallocateSame) {
auto *Allocator = this->Allocator.get();
// Check that reallocating a chunk to a slightly smaller or larger size
// returns the same chunk. This requires that all the sizes we iterate on use
// the same block size, but that should be the case for MaxSize - 64 with our
// default class size maps.
constexpr scudo::uptr ReallocSize =
TypeParam::Primary::SizeClassMap::MaxSize - 64;
void *P = Allocator->allocate(ReallocSize, Origin);
const char Marker = 0xab;
memset(P, Marker, ReallocSize);
for (scudo::sptr Delta = -32; Delta < 32; Delta += 8) {
const scudo::uptr NewSize = ReallocSize + Delta;
void *NewP = Allocator->reallocate(P, NewSize);
EXPECT_EQ(NewP, P);
for (scudo::uptr I = 0; I < ReallocSize - 32; I++)
EXPECT_EQ((reinterpret_cast<char *>(NewP))[I], Marker);
checkMemoryTaggingMaybe(Allocator, NewP, NewSize, 0);
}
Allocator->deallocate(P, Origin);
}
SCUDO_TYPED_TEST(ScudoCombinedTest, IterateOverChunks) {
auto *Allocator = this->Allocator.get();
// Allocates a bunch of chunks, then iterate over all the chunks, ensuring
// they are the ones we allocated. This requires the allocator to not have any
// other allocated chunk at this point (eg: won't work with the Quarantine).
// FIXME: Make it work with UseQuarantine and tagging enabled. Internals of
// iterateOverChunks reads header by tagged and non-tagger pointers so one of
// them will fail.
if (!UseQuarantine) {
std::vector<void *> V;
for (scudo::uptr I = 0; I < 64U; I++)
V.push_back(Allocator->allocate(
rand() % (TypeParam::Primary::SizeClassMap::MaxSize / 2U), Origin));
Allocator->disable();
Allocator->iterateOverChunks(
0U, static_cast<scudo::uptr>(SCUDO_MMAP_RANGE_SIZE - 1),
[](uintptr_t Base, size_t Size, void *Arg) {
std::vector<void *> *V = reinterpret_cast<std::vector<void *> *>(Arg);
void *P = reinterpret_cast<void *>(Base);
EXPECT_NE(std::find(V->begin(), V->end(), P), V->end());
},
reinterpret_cast<void *>(&V));
Allocator->enable();
for (auto P : V)
Allocator->deallocate(P, Origin);
}
}
SCUDO_TYPED_TEST(ScudoCombinedDeathTest, UseAfterFree) {
auto *Allocator = this->Allocator.get();
// Check that use-after-free is detected.
for (scudo::uptr SizeLog = 0U; SizeLog <= 20U; SizeLog++) {
const scudo::uptr Size = 1U << SizeLog;
if (!Allocator->useMemoryTaggingTestOnly())
continue;
EXPECT_DEATH(
{
disableDebuggerdMaybe();
void *P = Allocator->allocate(Size, Origin);
Allocator->deallocate(P, Origin);
reinterpret_cast<char *>(P)[0] = 0xaa;
},
"");
EXPECT_DEATH(
{
disableDebuggerdMaybe();
void *P = Allocator->allocate(Size, Origin);
Allocator->deallocate(P, Origin);
reinterpret_cast<char *>(P)[Size - 1] = 0xaa;
},
"");
}
}
SCUDO_TYPED_TEST(ScudoCombinedDeathTest, DisableMemoryTagging) {
auto *Allocator = this->Allocator.get();
if (Allocator->useMemoryTaggingTestOnly()) {
// Check that disabling memory tagging works correctly.
void *P = Allocator->allocate(2048, Origin);
EXPECT_DEATH(reinterpret_cast<char *>(P)[2048] = 0xaa, "");
scudo::ScopedDisableMemoryTagChecks NoTagChecks;
Allocator->disableMemoryTagging();
reinterpret_cast<char *>(P)[2048] = 0xaa;
Allocator->deallocate(P, Origin);
P = Allocator->allocate(2048, Origin);
EXPECT_EQ(scudo::untagPointer(P), P);
reinterpret_cast<char *>(P)[2048] = 0xaa;
Allocator->deallocate(P, Origin);
Allocator->releaseToOS();
}
}
SCUDO_TYPED_TEST(ScudoCombinedTest, Stats) {
auto *Allocator = this->Allocator.get();
scudo::uptr BufferSize = 8192;
std::vector<char> Buffer(BufferSize);
scudo::uptr ActualSize = Allocator->getStats(Buffer.data(), BufferSize);
while (ActualSize > BufferSize) {
BufferSize = ActualSize + 1024;
Buffer.resize(BufferSize);
ActualSize = Allocator->getStats(Buffer.data(), BufferSize);
}
std::string Stats(Buffer.begin(), Buffer.end());
// Basic checks on the contents of the statistics output, which also allows us
// to verify that we got it all.
EXPECT_NE(Stats.find("Stats: SizeClassAllocator"), std::string::npos);
EXPECT_NE(Stats.find("Stats: MapAllocator"), std::string::npos);
EXPECT_NE(Stats.find("Stats: Quarantine"), std::string::npos);
}
SCUDO_TYPED_TEST(ScudoCombinedTest, CacheDrain) {
auto *Allocator = this->Allocator.get();
std::vector<void *> V;
for (scudo::uptr I = 0; I < 64U; I++)
V.push_back(Allocator->allocate(
rand() % (TypeParam::Primary::SizeClassMap::MaxSize / 2U), Origin));
for (auto P : V)
Allocator->deallocate(P, Origin);
bool UnlockRequired;
auto *TSD = Allocator->getTSDRegistry()->getTSDAndLock(&UnlockRequired);
EXPECT_TRUE(!TSD->Cache.isEmpty());
TSD->Cache.drain();
EXPECT_TRUE(TSD->Cache.isEmpty());
if (UnlockRequired)
TSD->unlock();
}
SCUDO_TYPED_TEST(ScudoCombinedTest, ThreadedCombined) {
std::mutex Mutex;
std::condition_variable Cv;
bool Ready = false;
auto *Allocator = this->Allocator.get();
std::thread Threads[32];
for (scudo::uptr I = 0; I < ARRAY_SIZE(Threads); I++)
Threads[I] = std::thread([&]() {
{
std::unique_lock<std::mutex> Lock(Mutex);
while (!Ready)
Cv.wait(Lock);
}
std::vector<std::pair<void *, scudo::uptr>> V;
for (scudo::uptr I = 0; I < 256U; I++) {
const scudo::uptr Size = std::rand() % 4096U;
void *P = Allocator->allocate(Size, Origin);
// A region could have ran out of memory, resulting in a null P.
if (P)
V.push_back(std::make_pair(P, Size));
}
while (!V.empty()) {
auto Pair = V.back();
Allocator->deallocate(Pair.first, Origin, Pair.second);
V.pop_back();
}
});
{
std::unique_lock<std::mutex> Lock(Mutex);
Ready = true;
Cv.notify_all();
}
for (auto &T : Threads)
T.join();
Allocator->releaseToOS();
}
// Test that multiple instantiations of the allocator have not messed up the
// process's signal handlers (GWP-ASan used to do this).
TEST(ScudoCombinedDeathTest, SKIP_ON_FUCHSIA(testSEGV)) {
const scudo::uptr Size = 4 * scudo::getPageSizeCached();
scudo::MapPlatformData Data = {};
void *P = scudo::map(nullptr, Size, "testSEGV", MAP_NOACCESS, &Data);
EXPECT_NE(P, nullptr);
EXPECT_DEATH(memset(P, 0xaa, Size), "");
scudo::unmap(P, Size, UNMAP_ALL, &Data);
}
struct DeathSizeClassConfig {
static const scudo::uptr NumBits = 1;
static const scudo::uptr MinSizeLog = 10;
static const scudo::uptr MidSizeLog = 10;
static const scudo::uptr MaxSizeLog = 13;
static const scudo::u32 MaxNumCachedHint = 4;
static const scudo::uptr MaxBytesCachedLog = 12;
static const scudo::uptr SizeDelta = 0;
};
static const scudo::uptr DeathRegionSizeLog = 20U;
struct DeathConfig {
static const bool MaySupportMemoryTagging = false;
// Tiny allocator, its Primary only serves chunks of four sizes.
using SizeClassMap = scudo::FixedSizeClassMap<DeathSizeClassConfig>;
typedef scudo::SizeClassAllocator64<DeathConfig> Primary;
static const scudo::uptr PrimaryRegionSizeLog = DeathRegionSizeLog;
static const scudo::s32 PrimaryMinReleaseToOsIntervalMs = INT32_MIN;
static const scudo::s32 PrimaryMaxReleaseToOsIntervalMs = INT32_MAX;
typedef scudo::uptr PrimaryCompactPtrT;
static const scudo::uptr PrimaryCompactPtrScale = 0;
static const bool PrimaryEnableRandomOffset = true;
static const scudo::uptr PrimaryMapSizeIncrement = 1UL << 18;
typedef scudo::MapAllocatorNoCache SecondaryCache;
template <class A> using TSDRegistryT = scudo::TSDRegistrySharedT<A, 1U, 1U>;
};
TEST(ScudoCombinedDeathTest, DeathCombined) {
using AllocatorT = TestAllocator<DeathConfig>;
auto Allocator = std::unique_ptr<AllocatorT>(new AllocatorT());
const scudo::uptr Size = 1000U;
void *P = Allocator->allocate(Size, Origin);
EXPECT_NE(P, nullptr);
// Invalid sized deallocation.
EXPECT_DEATH(Allocator->deallocate(P, Origin, Size + 8U), "");
// Misaligned pointer. Potentially unused if EXPECT_DEATH isn't available.
UNUSED void *MisalignedP =
reinterpret_cast<void *>(reinterpret_cast<scudo::uptr>(P) | 1U);
EXPECT_DEATH(Allocator->deallocate(MisalignedP, Origin, Size), "");
EXPECT_DEATH(Allocator->reallocate(MisalignedP, Size * 2U), "");
// Header corruption.
scudo::u64 *H =
reinterpret_cast<scudo::u64 *>(scudo::Chunk::getAtomicHeader(P));
*H ^= 0x42U;
EXPECT_DEATH(Allocator->deallocate(P, Origin, Size), "");
*H ^= 0x420042U;
EXPECT_DEATH(Allocator->deallocate(P, Origin, Size), "");
*H ^= 0x420000U;
// Invalid chunk state.
Allocator->deallocate(P, Origin, Size);
EXPECT_DEATH(Allocator->deallocate(P, Origin, Size), "");
EXPECT_DEATH(Allocator->reallocate(P, Size * 2U), "");
EXPECT_DEATH(Allocator->getUsableSize(P), "");
}
// Verify that when a region gets full, the allocator will still manage to
// fulfill the allocation through a larger size class.
TEST(ScudoCombinedTest, FullRegion) {
using AllocatorT = TestAllocator<DeathConfig>;
auto Allocator = std::unique_ptr<AllocatorT>(new AllocatorT());
std::vector<void *> V;
scudo::uptr FailedAllocationsCount = 0;
for (scudo::uptr ClassId = 1U;
ClassId <= DeathConfig::SizeClassMap::LargestClassId; ClassId++) {
const scudo::uptr Size =
DeathConfig::SizeClassMap::getSizeByClassId(ClassId);
// Allocate enough to fill all of the regions above this one.
const scudo::uptr MaxNumberOfChunks =
((1U << DeathRegionSizeLog) / Size) *
(DeathConfig::SizeClassMap::LargestClassId - ClassId + 1);
void *P;
for (scudo::uptr I = 0; I <= MaxNumberOfChunks; I++) {
P = Allocator->allocate(Size - 64U, Origin);
if (!P)
FailedAllocationsCount++;
else
V.push_back(P);
}
while (!V.empty()) {
Allocator->deallocate(V.back(), Origin);
V.pop_back();
}
}
EXPECT_EQ(FailedAllocationsCount, 0U);
}
// Ensure that releaseToOS can be called prior to any other allocator
// operation without issue.
SCUDO_TYPED_TEST(ScudoCombinedTest, ReleaseToOS) {
auto *Allocator = this->Allocator.get();
Allocator->releaseToOS();
}
SCUDO_TYPED_TEST(ScudoCombinedTest, OddEven) {
auto *Allocator = this->Allocator.get();
if (!Allocator->useMemoryTaggingTestOnly())
return;
auto CheckOddEven = [](scudo::uptr P1, scudo::uptr P2) {
scudo::uptr Tag1 = scudo::extractTag(scudo::loadTag(P1));
scudo::uptr Tag2 = scudo::extractTag(scudo::loadTag(P2));
EXPECT_NE(Tag1 % 2, Tag2 % 2);
};
using SizeClassMap = typename TypeParam::Primary::SizeClassMap;
for (scudo::uptr ClassId = 1U; ClassId <= SizeClassMap::LargestClassId;
ClassId++) {
const scudo::uptr Size = SizeClassMap::getSizeByClassId(ClassId);
std::set<scudo::uptr> Ptrs;
bool Found = false;
for (unsigned I = 0; I != 65536; ++I) {
scudo::uptr P = scudo::untagPointer(reinterpret_cast<scudo::uptr>(
Allocator->allocate(Size - scudo::Chunk::getHeaderSize(), Origin)));
if (Ptrs.count(P - Size)) {
Found = true;
CheckOddEven(P, P - Size);
break;
}
if (Ptrs.count(P + Size)) {
Found = true;
CheckOddEven(P, P + Size);
break;
}
Ptrs.insert(P);
}
EXPECT_TRUE(Found);
}
}
SCUDO_TYPED_TEST(ScudoCombinedTest, DisableMemInit) {
auto *Allocator = this->Allocator.get();
std::vector<void *> Ptrs(65536, nullptr);
Allocator->setOption(scudo::Option::ThreadDisableMemInit, 1);
constexpr scudo::uptr MinAlignLog = FIRST_32_SECOND_64(3U, 4U);
// Test that if mem-init is disabled on a thread, calloc should still work as
// expected. This is tricky to ensure when MTE is enabled, so this test tries
// to exercise the relevant code on our MTE path.
for (scudo::uptr ClassId = 1U; ClassId <= 8; ClassId++) {
using SizeClassMap = typename TypeParam::Primary::SizeClassMap;
const scudo::uptr Size =
SizeClassMap::getSizeByClassId(ClassId) - scudo::Chunk::getHeaderSize();
if (Size < 8)
continue;
for (unsigned I = 0; I != Ptrs.size(); ++I) {
Ptrs[I] = Allocator->allocate(Size, Origin);
memset(Ptrs[I], 0xaa, Size);
}
for (unsigned I = 0; I != Ptrs.size(); ++I)
Allocator->deallocate(Ptrs[I], Origin, Size);
for (unsigned I = 0; I != Ptrs.size(); ++I) {
Ptrs[I] = Allocator->allocate(Size - 8, Origin);
memset(Ptrs[I], 0xbb, Size - 8);
}
for (unsigned I = 0; I != Ptrs.size(); ++I)
Allocator->deallocate(Ptrs[I], Origin, Size - 8);
for (unsigned I = 0; I != Ptrs.size(); ++I) {
Ptrs[I] = Allocator->allocate(Size, Origin, 1U << MinAlignLog, true);
for (scudo::uptr J = 0; J < Size; ++J)
ASSERT_EQ((reinterpret_cast<char *>(Ptrs[I]))[J], 0);
}
}
Allocator->setOption(scudo::Option::ThreadDisableMemInit, 0);
}
SCUDO_TYPED_TEST(ScudoCombinedTest, ReallocateInPlaceStress) {
auto *Allocator = this->Allocator.get();
// Regression test: make realloc-in-place happen at the very right end of a
// mapped region.
constexpr int nPtrs = 10000;
for (int i = 1; i < 32; ++i) {
scudo::uptr Size = 16 * i - 1;
std::vector<void *> Ptrs;
for (int i = 0; i < nPtrs; ++i) {
void *P = Allocator->allocate(Size, Origin);
P = Allocator->reallocate(P, Size + 1);
Ptrs.push_back(P);
}
for (int i = 0; i < nPtrs; ++i)
Allocator->deallocate(Ptrs[i], Origin);
}
}
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