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Merge pull request #28 from jserv/gcc-visibility

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Avoid unnecessary symbol exposure with ELF-based systems
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Daan 2019-06-25 19:54:28 -07:00 committed by GitHub
commit 1713c37f9d
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2 changed files with 10 additions and 1 deletions
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1
CMakeLists.txt
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@ -82,6 +82,7 @@ if(CMAKE_C_COMPILER_ID MATCHES "AppleClang|Clang|GNU")
list(APPEND mi_cflags -Wall -Wextra -Wno-unknown-pragmas -ftls-model=initial-exec)
if(CMAKE_C_COMPILER_ID MATCHES "GNU")
list(APPEND mi_cflags -Wno-invalid-memory-model)
list(APPEND mi_cflags -fvisibility=hidden)
endif()
endif()

10
src/alloc-override.c
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@ -25,7 +25,7 @@ terms of the MIT license. A copy of the license can be found in the file
#if (defined(__GNUC__) || defined(__clang__)) && !defined(__MACH__)
// use aliasing to alias the exported function to one of our `mi_` functions
#define MI_FORWARD(fun) __attribute__((alias(#fun), used));
#define MI_FORWARD(fun) __attribute__((alias(#fun), used, visibility("default")));
#define MI_FORWARD1(fun,x) MI_FORWARD(fun)
#define MI_FORWARD2(fun,x,y) MI_FORWARD(fun)
#define MI_FORWARD0(fun,x) MI_FORWARD(fun)
@ -60,6 +60,10 @@ terms of the MIT license. A copy of the license can be found in the file
void free(void* p) mi_attr_noexcept MI_FORWARD0(mi_free, p)
#endif
#if (defined(__GNUC__) || defined(__clang__)) && !defined(__MACH__)
#pragma GCC visibility push(default)
#endif
// ------------------------------------------------------
// Override new/delete
// This is not really necessary as they usually call
@ -189,4 +193,8 @@ void* reallocarray( void* p, size_t count, size_t size ) { // BSD
}
#endif
#if (defined(__GNUC__) || defined(__clang__)) && !defined(__MACH__)
#pragma GCC visibility pop
#endif
#endif // MI_MALLOC_OVERRIDE & !_WIN32