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#if defined(OS_LINUX)
#include <cstdlib>
/// Interposing these symbols explicitly. The idea works like this: malloc.cpp compiles to a
/// dedicated object (namely clickhouse_malloc.o), and it will show earlier in the link command
/// than malloc libs like libjemalloc.a. As a result, these symbols get picked in time right after.
extern "C"
{
void *malloc(size_t size);
void free(void *ptr);
void *calloc(size_t nmemb, size_t size);
void *realloc(void *ptr, size_t size);
int posix_memalign(void **memptr, size_t alignment, size_t size);
void *aligned_alloc(size_t alignment, size_t size);
void *valloc(size_t size);
void *memalign(size_t alignment, size_t size);
#if !defined(USE_MUSL)
void *pvalloc(size_t size);
#endif
}
template<typename T>
inline void ignore(T x __attribute__((unused)))
{
}
static void dummyFunctionForInterposing() __attribute__((used));
static void dummyFunctionForInterposing()
{
void* dummy;
free(nullptr); // NOLINT
ignore(malloc(0)); // NOLINT
ignore(calloc(0, 0)); // NOLINT
ignore(realloc(nullptr, 0)); // NOLINT
ignore(posix_memalign(&dummy, 0, 0)); // NOLINT
ignore(aligned_alloc(1, 0)); // NOLINT
ignore(valloc(0)); // NOLINT
ignore(memalign(0, 0)); // NOLINT
#if !defined(USE_MUSL)
ignore(pvalloc(0)); // NOLINT
#endif
}
#endif
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