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45 lines
1.5 KiB
C++
45 lines
1.5 KiB
C++
#if defined(OS_LINUX)
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#include <stdlib.h>
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/// Interposing these symbols explicitly. The idea works like this: malloc.cpp compiles to a
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/// dedicated object (namely clickhouse_malloc.o), and it will show earlier in the link command
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/// than malloc libs like libjemalloc.a. As a result, these symbols get picked in time right after.
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wredundant-decls"
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extern "C"
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{
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void *malloc(size_t size);
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void free(void *ptr);
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void *calloc(size_t nmemb, size_t size);
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void *realloc(void *ptr, size_t size);
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int posix_memalign(void **memptr, size_t alignment, size_t size);
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void *aligned_alloc(size_t alignment, size_t size);
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void *valloc(size_t size);
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void *memalign(size_t alignment, size_t size);
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void *pvalloc(size_t size);
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}
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#pragma GCC diagnostic pop
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template<typename T>
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inline void ignore(T x __attribute__((unused)))
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{
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}
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static void dummyFunctionForInterposing() __attribute__((used));
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static void dummyFunctionForInterposing()
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{
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void* dummy;
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/// Suppression for PVS-Studio and clang-tidy.
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free(nullptr); // -V575 NOLINT
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ignore(malloc(0)); // -V575 NOLINT
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ignore(calloc(0, 0)); // -V575 NOLINT
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ignore(realloc(nullptr, 0)); // -V575 NOLINT
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ignore(posix_memalign(&dummy, 0, 0)); // -V575 NOLINT
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ignore(aligned_alloc(0, 0)); // -V575 NOLINT
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ignore(valloc(0)); // -V575 NOLINT
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ignore(memalign(0, 0)); // -V575 NOLINT
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ignore(pvalloc(0)); // -V575 NOLINT
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}
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#endif
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