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//===-- sanitizer_posix_test.cpp ------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// Tests for POSIX-specific code.
//
//===----------------------------------------------------------------------===//
#include "sanitizer_common/sanitizer_platform.h"
#if SANITIZER_POSIX
# include <pthread.h>
# include <sys/mman.h>
# include <algorithm>
# include <numeric>
# include "gtest/gtest.h"
# include "sanitizer_common/sanitizer_common.h"
namespace __sanitizer {
static pthread_key_t key;
static bool destructor_executed;
extern "C"
void destructor(void *arg) {
uptr iter = reinterpret_cast<uptr>(arg);
if (iter > 1) {
ASSERT_EQ(0, pthread_setspecific(key, reinterpret_cast<void *>(iter - 1)));
return;
}
destructor_executed = true;
}
extern "C"
void *thread_func(void *arg) {
return reinterpret_cast<void*>(pthread_setspecific(key, arg));
}
static void SpawnThread(uptr iteration) {
destructor_executed = false;
pthread_t tid;
ASSERT_EQ(0, pthread_create(&tid, 0, &thread_func,
reinterpret_cast<void *>(iteration)));
void *retval;
ASSERT_EQ(0, pthread_join(tid, &retval));
ASSERT_EQ(0, retval);
}
TEST(SanitizerCommon, PthreadDestructorIterations) {
ASSERT_EQ(0, pthread_key_create(&key, &destructor));
SpawnThread(GetPthreadDestructorIterations());
EXPECT_TRUE(destructor_executed);
SpawnThread(GetPthreadDestructorIterations() + 1);
#if SANITIZER_SOLARIS
// Solaris continues calling destructors beyond PTHREAD_DESTRUCTOR_ITERATIONS.
EXPECT_TRUE(destructor_executed);
#else
EXPECT_FALSE(destructor_executed);
#endif
ASSERT_EQ(0, pthread_key_delete(key));
}
TEST(SanitizerCommon, IsAccessibleMemoryRange) {
const int page_size = GetPageSize();
InternalMmapVector<char> buffer(3 * page_size);
uptr mem = reinterpret_cast<uptr>(buffer.data());
// Protect the middle page.
mprotect((void *)(mem + page_size), page_size, PROT_NONE);
EXPECT_TRUE(IsAccessibleMemoryRange(mem, page_size - 1));
EXPECT_TRUE(IsAccessibleMemoryRange(mem, page_size));
EXPECT_FALSE(IsAccessibleMemoryRange(mem, page_size + 1));
EXPECT_TRUE(IsAccessibleMemoryRange(mem + page_size - 1, 1));
EXPECT_FALSE(IsAccessibleMemoryRange(mem + page_size - 1, 2));
EXPECT_FALSE(IsAccessibleMemoryRange(mem + 2 * page_size - 1, 1));
EXPECT_TRUE(IsAccessibleMemoryRange(mem + 2 * page_size, page_size));
EXPECT_FALSE(IsAccessibleMemoryRange(mem, 3 * page_size));
EXPECT_FALSE(IsAccessibleMemoryRange(0x0, 2));
}
TEST(SanitizerCommon, IsAccessibleMemoryRangeLarge) {
InternalMmapVector<char> buffer(10000 * GetPageSize());
EXPECT_TRUE(IsAccessibleMemoryRange(reinterpret_cast<uptr>(buffer.data()),
buffer.size()));
}
TEST(SanitizerCommon, TryMemCpy) {
std::vector<char> src(10000000);
std::iota(src.begin(), src.end(), 123);
std::vector<char> dst;
// Don't use ::testing::ElementsAreArray or similar, as the huge output on an
// error is not helpful.
dst.assign(1, 0);
EXPECT_TRUE(TryMemCpy(dst.data(), src.data(), dst.size()));
EXPECT_TRUE(std::equal(dst.begin(), dst.end(), src.begin()));
dst.assign(100, 0);
EXPECT_TRUE(TryMemCpy(dst.data(), src.data(), dst.size()));
EXPECT_TRUE(std::equal(dst.begin(), dst.end(), src.begin()));
dst.assign(534, 0);
EXPECT_TRUE(TryMemCpy(dst.data(), src.data(), dst.size()));
EXPECT_TRUE(std::equal(dst.begin(), dst.end(), src.begin()));
dst.assign(GetPageSize(), 0);
EXPECT_TRUE(TryMemCpy(dst.data(), src.data(), dst.size()));
EXPECT_TRUE(std::equal(dst.begin(), dst.end(), src.begin()));
dst.assign(src.size(), 0);
EXPECT_TRUE(TryMemCpy(dst.data(), src.data(), dst.size()));
EXPECT_TRUE(std::equal(dst.begin(), dst.end(), src.begin()));
dst.assign(src.size() - 1, 0);
EXPECT_TRUE(TryMemCpy(dst.data(), src.data(), dst.size()));
EXPECT_TRUE(std::equal(dst.begin(), dst.end(), src.begin()));
}
TEST(SanitizerCommon, TryMemCpyNull) {
std::vector<char> dst(100);
EXPECT_FALSE(TryMemCpy(dst.data(), nullptr, dst.size()));
}
TEST(SanitizerCommon, MemCpyAccessible) {
const int page_num = 1000;
const int page_size = GetPageSize();
InternalMmapVector<char> src(page_num * page_size);
std::iota(src.begin(), src.end(), 123);
std::vector<char> dst;
std::vector<char> exp = {src.begin(), src.end()};
// Protect some pages.
for (int i = 7; i < page_num; i *= 2) {
mprotect(src.data() + i * page_size, page_size, PROT_NONE);
std::fill(exp.data() + i * page_size, exp.data() + (i + 1) * page_size, 0);
}
dst.assign(src.size(), 0);
EXPECT_FALSE(TryMemCpy(dst.data(), src.data(), dst.size()));
// Full page aligned range with mprotect pages.
dst.assign(src.size(), 0);
MemCpyAccessible(dst.data(), src.data(), dst.size());
EXPECT_TRUE(std::equal(dst.begin(), dst.end(), exp.begin()));
// Misaligned range with mprotect pages.
size_t offb = 3;
size_t offe = 7;
dst.assign(src.size() - offb - offe, 0);
MemCpyAccessible(dst.data(), src.data() + offb, dst.size());
EXPECT_TRUE(std::equal(dst.begin(), dst.end(), exp.begin() + offb));
// Misaligned range with ends in mprotect pages.
offb = 3 + 7 * page_size;
offe = 7 + 14 * page_size;
dst.assign(src.size() - offb - offe, 0);
MemCpyAccessible(dst.data(), src.data() + offb, dst.size());
EXPECT_TRUE(std::equal(dst.begin(), dst.end(), exp.begin() + offb));
}
} // namespace __sanitizer
#endif // SANITIZER_POSIX
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