forked from OSchip/llvm-project
82 lines
2.4 KiB
C
82 lines
2.4 KiB
C
// RUN: %clang_scudo %s -o %t
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// RUN: %run %t valid 2>&1
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// RUN: not %run %t invalid 2>&1
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// RUN: %env_scudo_opts=allocator_may_return_null=1 %run %t invalid 2>&1
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// Tests that the various aligned allocation functions work as intended. Also
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// tests for the condition where the alignment is not a power of 2.
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#include <assert.h>
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#include <errno.h>
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#include <malloc.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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// Sometimes the headers may not have this...
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void *aligned_alloc(size_t alignment, size_t size);
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int main(int argc, char **argv)
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{
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void *p = NULL;
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size_t alignment = 1U << 12;
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size_t size = 1U << 12;
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int err;
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assert(argc == 2);
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if (!strcmp(argv[1], "valid")) {
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posix_memalign(&p, alignment, size);
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assert(p);
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assert(((uintptr_t)p & (alignment - 1)) == 0);
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free(p);
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p = aligned_alloc(alignment, size);
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assert(p);
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assert(((uintptr_t)p & (alignment - 1)) == 0);
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free(p);
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// Tests various combinations of alignment and sizes
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for (int i = (sizeof(void *) == 4) ? 3 : 4; i < 19; i++) {
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alignment = 1U << i;
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for (int j = 1; j < 33; j++) {
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size = 0x800 * j;
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for (int k = 0; k < 3; k++) {
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p = memalign(alignment, size - (2 * sizeof(void *) * k));
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assert(p);
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assert(((uintptr_t)p & (alignment - 1)) == 0);
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free(p);
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}
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}
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}
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// For larger alignment, reduce the number of allocations to avoid running
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// out of potential addresses (on 32-bit).
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for (int i = 19; i <= 24; i++) {
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for (int k = 0; k < 3; k++) {
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p = memalign(alignment, 0x1000 - (2 * sizeof(void *) * k));
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assert(p);
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assert(((uintptr_t)p & (alignment - 1)) == 0);
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free(p);
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}
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}
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}
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if (!strcmp(argv[1], "invalid")) {
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// Alignment is not a power of 2.
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p = memalign(alignment - 1, size);
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assert(!p);
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// Size is not a multiple of alignment.
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p = aligned_alloc(alignment, size >> 1);
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assert(!p);
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void *p_unchanged = (void *)0x42UL;
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p = p_unchanged;
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// Alignment is not a power of 2.
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err = posix_memalign(&p, 3, size);
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assert(p == p_unchanged);
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assert(err == EINVAL);
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// Alignment is a power of 2, but not a multiple of size(void *).
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err = posix_memalign(&p, 2, size);
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assert(p == p_unchanged);
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assert(err == EINVAL);
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}
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return 0;
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}
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