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