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/*
* Copyright (c) 2022, Peter Elliott <pelliott@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibTest/TestCase.h>
#include <LibC/mallocdefs.h>
#include <stdlib.h>
static constexpr size_t runs = 5000;
static constexpr size_t ptrs_per_run = 20;
static size_t random_alignment()
{
return 1 << (rand() % 16);
}
static size_t random_size()
{
int r = rand() % num_size_classes;
if (r == num_size_classes - 1) {
return rand() % (1 << 17);
}
return size_classes[r] + (rand() % (size_classes[r + 1] - size_classes[r]));
}
static bool is_aligned(void* ptr, size_t align)
{
return (reinterpret_cast<uintptr_t>(ptr) & (align - 1)) == 0;
}
TEST_CASE(posix_memalign_fuzz)
{
EXPECT_NO_CRASH("posix_memalign should not crash under regular use", [] {
for (size_t i = 0; i < runs; ++i) {
size_t align = random_alignment();
size_t size = random_size();
for (size_t j = 0; j < 2; ++j) {
void* ptrs[ptrs_per_run];
for (size_t k = 0; k < ptrs_per_run; ++k) {
EXPECT_EQ(posix_memalign(&(ptrs[k]), align, size), 0);
EXPECT(is_aligned(ptrs[k], align));
}
for (size_t k = 0; k < ptrs_per_run; ++k) {
free(ptrs[k]);
}
}
}
return Test::Crash::Failure::DidNotCrash;
});
}
TEST_CASE(posix_memalign_not_power2)
{
char secret_ptr[0];
void* memptr = secret_ptr;
EXPECT_EQ(posix_memalign(&memptr, 7, 256), EINVAL);
EXPECT_EQ(memptr, secret_ptr);
}
TEST_CASE(aligned_alloc_fuzz)
{
EXPECT_NO_CRASH("aligned_alloc should not crash under regular use", [] {
for (size_t i = 0; i < runs; ++i) {
size_t align = random_alignment();
size_t size = random_size();
for (size_t j = 0; j < 2; ++j) {
void* ptrs[ptrs_per_run];
for (size_t k = 0; k < ptrs_per_run; ++k) {
ptrs[k] = aligned_alloc(align, size);
EXPECT(ptrs[k]);
EXPECT(is_aligned(ptrs[k], align));
}
for (size_t k = 0; k < ptrs_per_run; ++k) {
free(ptrs[k]);
}
}
}
return Test::Crash::Failure::DidNotCrash;
});
}
TEST_CASE(aligned_alloc_not_power2)
{
#ifdef __clang__
# pragma clang diagnostic push
# pragma clang diagnostic ignored "-Wnon-power-of-two-alignment"
#endif
EXPECT_EQ(aligned_alloc(7, 256), nullptr);
EXPECT_EQ(errno, EINVAL);
#ifdef __clang__
# pragma clang diagnostic pop
#endif
}
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