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//===-- tsan_mman_test.cc -------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This file is a part of ThreadSanitizer (TSan), a race detector.
//
//===----------------------------------------------------------------------===//
#include <limits>
#include <sanitizer/allocator_interface.h>
#include "tsan_mman.h"
#include "tsan_rtl.h"
#include "gtest/gtest.h"
namespace __tsan {
TEST(Mman, Internal) {
char *p = (char*)internal_alloc(MBlockScopedBuf, 10);
EXPECT_NE(p, (char*)0);
char *p2 = (char*)internal_alloc(MBlockScopedBuf, 20);
EXPECT_NE(p2, (char*)0);
EXPECT_NE(p2, p);
for (int i = 0; i < 10; i++) {
p[i] = 42;
}
for (int i = 0; i < 20; i++) {
((char*)p2)[i] = 42;
}
internal_free(p);
internal_free(p2);
}
TEST(Mman, User) {
ThreadState *thr = cur_thread();
uptr pc = 0;
char *p = (char*)user_alloc(thr, pc, 10);
EXPECT_NE(p, (char*)0);
char *p2 = (char*)user_alloc(thr, pc, 20);
EXPECT_NE(p2, (char*)0);
EXPECT_NE(p2, p);
EXPECT_EQ(10U, user_alloc_usable_size(p));
EXPECT_EQ(20U, user_alloc_usable_size(p2));
user_free(thr, pc, p);
user_free(thr, pc, p2);
}
TEST(Mman, UserRealloc) {
ThreadState *thr = cur_thread();
uptr pc = 0;
{
void *p = user_realloc(thr, pc, 0, 0);
// Realloc(NULL, N) is equivalent to malloc(N), thus must return
// non-NULL pointer.
EXPECT_NE(p, (void*)0);
user_free(thr, pc, p);
}
{
void *p = user_realloc(thr, pc, 0, 100);
EXPECT_NE(p, (void*)0);
memset(p, 0xde, 100);
user_free(thr, pc, p);
}
{
void *p = user_alloc(thr, pc, 100);
EXPECT_NE(p, (void*)0);
memset(p, 0xde, 100);
// Realloc(P, 0) is equivalent to free(P) and returns NULL.
void *p2 = user_realloc(thr, pc, p, 0);
EXPECT_EQ(p2, (void*)0);
}
{
void *p = user_realloc(thr, pc, 0, 100);
EXPECT_NE(p, (void*)0);
memset(p, 0xde, 100);
void *p2 = user_realloc(thr, pc, p, 10000);
EXPECT_NE(p2, (void*)0);
for (int i = 0; i < 100; i++)
EXPECT_EQ(((char*)p2)[i], (char)0xde);
memset(p2, 0xde, 10000);
user_free(thr, pc, p2);
}
{
void *p = user_realloc(thr, pc, 0, 10000);
EXPECT_NE(p, (void*)0);
memset(p, 0xde, 10000);
void *p2 = user_realloc(thr, pc, p, 10);
EXPECT_NE(p2, (void*)0);
for (int i = 0; i < 10; i++)
EXPECT_EQ(((char*)p2)[i], (char)0xde);
user_free(thr, pc, p2);
}
}
TEST(Mman, UsableSize) {
ThreadState *thr = cur_thread();
uptr pc = 0;
char *p = (char*)user_alloc(thr, pc, 10);
char *p2 = (char*)user_alloc(thr, pc, 20);
EXPECT_EQ(0U, user_alloc_usable_size(NULL));
EXPECT_EQ(10U, user_alloc_usable_size(p));
EXPECT_EQ(20U, user_alloc_usable_size(p2));
user_free(thr, pc, p);
user_free(thr, pc, p2);
EXPECT_EQ(0U, user_alloc_usable_size((void*)0x4123));
}
TEST(Mman, Stats) {
ThreadState *thr = cur_thread();
uptr alloc0 = __sanitizer_get_current_allocated_bytes();
uptr heap0 = __sanitizer_get_heap_size();
uptr free0 = __sanitizer_get_free_bytes();
uptr unmapped0 = __sanitizer_get_unmapped_bytes();
EXPECT_EQ(10U, __sanitizer_get_estimated_allocated_size(10));
EXPECT_EQ(20U, __sanitizer_get_estimated_allocated_size(20));
EXPECT_EQ(100U, __sanitizer_get_estimated_allocated_size(100));
char *p = (char*)user_alloc(thr, 0, 10);
EXPECT_TRUE(__sanitizer_get_ownership(p));
EXPECT_EQ(10U, __sanitizer_get_allocated_size(p));
EXPECT_EQ(alloc0 + 16, __sanitizer_get_current_allocated_bytes());
EXPECT_GE(__sanitizer_get_heap_size(), heap0);
EXPECT_EQ(free0, __sanitizer_get_free_bytes());
EXPECT_EQ(unmapped0, __sanitizer_get_unmapped_bytes());
user_free(thr, 0, p);
EXPECT_EQ(alloc0, __sanitizer_get_current_allocated_bytes());
EXPECT_GE(__sanitizer_get_heap_size(), heap0);
EXPECT_EQ(free0, __sanitizer_get_free_bytes());
EXPECT_EQ(unmapped0, __sanitizer_get_unmapped_bytes());
}
TEST(Mman, Valloc) {
ThreadState *thr = cur_thread();
uptr page_size = GetPageSizeCached();
void *p = user_valloc(thr, 0, 100);
EXPECT_NE(p, (void*)0);
user_free(thr, 0, p);
p = user_pvalloc(thr, 0, 100);
EXPECT_NE(p, (void*)0);
user_free(thr, 0, p);
p = user_pvalloc(thr, 0, 0);
EXPECT_NE(p, (void*)0);
EXPECT_EQ(page_size, __sanitizer_get_allocated_size(p));
user_free(thr, 0, p);
}
#if !SANITIZER_DEBUG
// EXPECT_DEATH clones a thread with 4K stack,
// which is overflown by tsan memory accesses functions in debug mode.
TEST(Mman, Memalign) {
ThreadState *thr = cur_thread();
void *p = user_memalign(thr, 0, 8, 100);
EXPECT_NE(p, (void*)0);
user_free(thr, 0, p);
// TODO(alekseyshl): Remove this death test when memalign is verified by
// tests in sanitizer_common.
p = NULL;
EXPECT_DEATH(p = user_memalign(thr, 0, 7, 100),
"invalid-allocation-alignment");
EXPECT_EQ(0L, p);
}
#endif
TEST(Mman, PosixMemalign) {
ThreadState *thr = cur_thread();
void *p = NULL;
int res = user_posix_memalign(thr, 0, &p, 8, 100);
EXPECT_NE(p, (void*)0);
EXPECT_EQ(res, 0);
user_free(thr, 0, p);
}
TEST(Mman, AlignedAlloc) {
ThreadState *thr = cur_thread();
void *p = user_aligned_alloc(thr, 0, 8, 64);
EXPECT_NE(p, (void*)0);
user_free(thr, 0, p);
}
} // namespace __tsan
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