69 lines
2.1 KiB
C++
69 lines
2.1 KiB
C++
// RUN: %clang_scudo %s -lstdc++ -o %t
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// RUN: %run %t pointers 2>&1
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// RUN: %run %t contents 2>&1
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// RUN: not %run %t memalign 2>&1 | FileCheck %s
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// Tests that our reallocation function returns the same pointer when the
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// requested size can fit into the previously allocated chunk. Also tests that
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// a new chunk is returned if the size is greater, and that the contents of the
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// chunk are left unchanged.
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// As a final test, make sure that a chunk allocated by memalign cannot be
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// reallocated.
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#include <assert.h>
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#include <malloc.h>
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#include <string.h>
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#include <vector>
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int main(int argc, char **argv)
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{
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void *p, *old_p;
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// Those sizes will exercise both allocators (Primary & Secondary).
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std::vector<size_t> sizes{1, 16, 1024, 32768, 1 << 16, 1 << 17, 1 << 20};
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assert(argc == 2);
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for (size_t size : sizes) {
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if (!strcmp(argv[1], "pointers")) {
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old_p = p = realloc(nullptr, size);
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assert(p);
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size = malloc_usable_size(p);
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// Our realloc implementation will return the same pointer if the size
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// requested is lower than or equal to the usable size of the associated
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// chunk.
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p = realloc(p, size - 1);
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assert(p == old_p);
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p = realloc(p, size);
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assert(p == old_p);
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// And a new one if the size is greater.
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p = realloc(p, size + 1);
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assert(p != old_p);
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// A size of 0 will free the chunk and return nullptr.
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p = realloc(p, 0);
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assert(!p);
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old_p = nullptr;
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}
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if (!strcmp(argv[1], "contents")) {
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p = realloc(nullptr, size);
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assert(p);
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for (int i = 0; i < size; i++)
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reinterpret_cast<char *>(p)[i] = 'A';
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p = realloc(p, size + 1);
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// The contents of the reallocated chunk must match the original one.
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for (int i = 0; i < size; i++)
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assert(reinterpret_cast<char *>(p)[i] == 'A');
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}
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if (!strcmp(argv[1], "memalign")) {
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// A chunk coming from memalign cannot be reallocated.
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p = memalign(16, size);
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assert(p);
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p = realloc(p, size);
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free(p);
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}
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}
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return 0;
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}
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// CHECK: ERROR: invalid chunk type when reallocating address
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