| /* ---------------------------------------------------------------------------- |
| Copyright (c) 2018-2021, Microsoft Research, Daan Leijen |
| This is free software; you can redistribute it and/or modify it under the |
| terms of the MIT license. A copy of the license can be found in the file |
| "LICENSE" at the root of this distribution. |
| -----------------------------------------------------------------------------*/ |
| |
| #if !defined(MI_IN_ALLOC_C) |
| #error "this file should be included from 'alloc.c' (so aliases can work)" |
| #endif |
| |
| #if defined(MI_MALLOC_OVERRIDE) && defined(_WIN32) && !(defined(MI_SHARED_LIB) && defined(_DLL)) |
| #error "It is only possible to override "malloc" on Windows when building as a DLL (and linking the C runtime as a DLL)" |
| #endif |
| |
| #if defined(MI_MALLOC_OVERRIDE) && !(defined(_WIN32)) |
| |
| #if defined(__APPLE__) |
| #include <AvailabilityMacros.h> |
| mi_decl_externc void vfree(void* p); |
| mi_decl_externc size_t malloc_size(const void* p); |
| mi_decl_externc size_t malloc_good_size(size_t size); |
| #endif |
| |
| // helper definition for C override of C++ new |
| typedef struct mi_nothrow_s { int _tag; } mi_nothrow_t; |
| |
| // ------------------------------------------------------ |
| // Override system malloc |
| // ------------------------------------------------------ |
| |
| #if (defined(__GNUC__) || defined(__clang__)) && !defined(__APPLE__) && !MI_TRACK_ENABLED |
| // gcc, clang: use aliasing to alias the exported function to one of our `mi_` functions |
| #if (defined(__GNUC__) && __GNUC__ >= 9) |
| #pragma GCC diagnostic ignored "-Wattributes" // or we get warnings that nodiscard is ignored on a forward |
| #define MI_FORWARD(fun) __attribute__((alias(#fun), used, visibility("default"), copy(fun))); |
| #else |
| #define MI_FORWARD(fun) __attribute__((alias(#fun), used, visibility("default"))); |
| #endif |
| #define MI_FORWARD1(fun,x) MI_FORWARD(fun) |
| #define MI_FORWARD2(fun,x,y) MI_FORWARD(fun) |
| #define MI_FORWARD3(fun,x,y,z) MI_FORWARD(fun) |
| #define MI_FORWARD0(fun,x) MI_FORWARD(fun) |
| #define MI_FORWARD02(fun,x,y) MI_FORWARD(fun) |
| #else |
| // otherwise use forwarding by calling our `mi_` function |
| #define MI_FORWARD1(fun,x) { return fun(x); } |
| #define MI_FORWARD2(fun,x,y) { return fun(x,y); } |
| #define MI_FORWARD3(fun,x,y,z) { return fun(x,y,z); } |
| #define MI_FORWARD0(fun,x) { fun(x); } |
| #define MI_FORWARD02(fun,x,y) { fun(x,y); } |
| #endif |
| |
| |
| #if defined(__APPLE__) && defined(MI_SHARED_LIB_EXPORT) && defined(MI_OSX_INTERPOSE) |
| // define MI_OSX_IS_INTERPOSED as we should not provide forwarding definitions for |
| // functions that are interposed (or the interposing does not work) |
| #define MI_OSX_IS_INTERPOSED |
| |
| mi_decl_externc size_t mi_malloc_size_checked(void *p) { |
| if (!mi_is_in_heap_region(p)) return 0; |
| return mi_usable_size(p); |
| } |
| |
| // use interposing so `DYLD_INSERT_LIBRARIES` works without `DYLD_FORCE_FLAT_NAMESPACE=1` |
| // See: <https://books.google.com/books?id=K8vUkpOXhN4C&pg=PA73> |
| struct mi_interpose_s { |
| const void* replacement; |
| const void* target; |
| }; |
| #define MI_INTERPOSE_FUN(oldfun,newfun) { (const void*)&newfun, (const void*)&oldfun } |
| #define MI_INTERPOSE_MI(fun) MI_INTERPOSE_FUN(fun,mi_##fun) |
| |
| __attribute__((used)) static struct mi_interpose_s _mi_interposes[] __attribute__((section("__DATA, __interpose"))) = |
| { |
| MI_INTERPOSE_MI(malloc), |
| MI_INTERPOSE_MI(calloc), |
| MI_INTERPOSE_MI(realloc), |
| MI_INTERPOSE_MI(strdup), |
| MI_INTERPOSE_MI(strndup), |
| MI_INTERPOSE_MI(realpath), |
| MI_INTERPOSE_MI(posix_memalign), |
| MI_INTERPOSE_MI(reallocf), |
| MI_INTERPOSE_MI(valloc), |
| MI_INTERPOSE_FUN(malloc_size,mi_malloc_size_checked), |
| MI_INTERPOSE_MI(malloc_good_size), |
| #if defined(MAC_OS_X_VERSION_10_15) && MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_15 |
| MI_INTERPOSE_MI(aligned_alloc), |
| #endif |
| #ifdef MI_OSX_ZONE |
| // we interpose malloc_default_zone in alloc-override-osx.c so we can use mi_free safely |
| MI_INTERPOSE_MI(free), |
| MI_INTERPOSE_FUN(vfree,mi_free), |
| #else |
| // sometimes code allocates from default zone but deallocates using plain free :-( (like NxHashResizeToCapacity <https://github.com/nneonneo/osx-10.9-opensource/blob/master/objc4-551.1/runtime/hashtable2.mm>) |
| MI_INTERPOSE_FUN(free,mi_cfree), // use safe free that checks if pointers are from us |
| MI_INTERPOSE_FUN(vfree,mi_cfree), |
| #endif |
| }; |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| void _ZdlPv(void* p); // delete |
| void _ZdaPv(void* p); // delete[] |
| void _ZdlPvm(void* p, size_t n); // delete |
| void _ZdaPvm(void* p, size_t n); // delete[] |
| void* _Znwm(size_t n); // new |
| void* _Znam(size_t n); // new[] |
| void* _ZnwmRKSt9nothrow_t(size_t n, mi_nothrow_t tag); // new nothrow |
| void* _ZnamRKSt9nothrow_t(size_t n, mi_nothrow_t tag); // new[] nothrow |
| #ifdef __cplusplus |
| } |
| #endif |
| __attribute__((used)) static struct mi_interpose_s _mi_cxx_interposes[] __attribute__((section("__DATA, __interpose"))) = |
| { |
| MI_INTERPOSE_FUN(_ZdlPv,mi_free), |
| MI_INTERPOSE_FUN(_ZdaPv,mi_free), |
| MI_INTERPOSE_FUN(_ZdlPvm,mi_free_size), |
| MI_INTERPOSE_FUN(_ZdaPvm,mi_free_size), |
| MI_INTERPOSE_FUN(_Znwm,mi_new), |
| MI_INTERPOSE_FUN(_Znam,mi_new), |
| MI_INTERPOSE_FUN(_ZnwmRKSt9nothrow_t,mi_new_nothrow), |
| MI_INTERPOSE_FUN(_ZnamRKSt9nothrow_t,mi_new_nothrow), |
| }; |
| |
| #elif defined(_MSC_VER) |
| // cannot override malloc unless using a dll. |
| // we just override new/delete which does work in a static library. |
| #else |
| // On all other systems forward to our API |
| mi_decl_export void* malloc(size_t size) MI_FORWARD1(mi_malloc, size) |
| mi_decl_export void* calloc(size_t size, size_t n) MI_FORWARD2(mi_calloc, size, n) |
| mi_decl_export void* realloc(void* p, size_t newsize) MI_FORWARD2(mi_realloc, p, newsize) |
| mi_decl_export void free(void* p) MI_FORWARD0(mi_free, p) |
| #endif |
| |
| #if (defined(__GNUC__) || defined(__clang__)) && !defined(__APPLE__) |
| #pragma GCC visibility push(default) |
| #endif |
| |
| // ------------------------------------------------------ |
| // Override new/delete |
| // This is not really necessary as they usually call |
| // malloc/free anyway, but it improves performance. |
| // ------------------------------------------------------ |
| #ifdef __cplusplus |
| // ------------------------------------------------------ |
| // With a C++ compiler we override the new/delete operators. |
| // see <https://en.cppreference.com/w/cpp/memory/new/operator_new> |
| // ------------------------------------------------------ |
| #include <new> |
| |
| #ifndef MI_OSX_IS_INTERPOSED |
| void operator delete(void* p) noexcept MI_FORWARD0(mi_free,p) |
| void operator delete[](void* p) noexcept MI_FORWARD0(mi_free,p) |
| |
| void* operator new(std::size_t n) noexcept(false) MI_FORWARD1(mi_new,n) |
| void* operator new[](std::size_t n) noexcept(false) MI_FORWARD1(mi_new,n) |
| |
| void* operator new (std::size_t n, const std::nothrow_t& tag) noexcept { MI_UNUSED(tag); return mi_new_nothrow(n); } |
| void* operator new[](std::size_t n, const std::nothrow_t& tag) noexcept { MI_UNUSED(tag); return mi_new_nothrow(n); } |
| |
| #if (__cplusplus >= 201402L || _MSC_VER >= 1916) |
| void operator delete (void* p, std::size_t n) noexcept MI_FORWARD02(mi_free_size,p,n) |
| void operator delete[](void* p, std::size_t n) noexcept MI_FORWARD02(mi_free_size,p,n) |
| #endif |
| #endif |
| |
| #if (__cplusplus > 201402L && defined(__cpp_aligned_new)) && (!defined(__GNUC__) || (__GNUC__ > 5)) |
| void operator delete (void* p, std::align_val_t al) noexcept { mi_free_aligned(p, static_cast<size_t>(al)); } |
| void operator delete[](void* p, std::align_val_t al) noexcept { mi_free_aligned(p, static_cast<size_t>(al)); } |
| void operator delete (void* p, std::size_t n, std::align_val_t al) noexcept { mi_free_size_aligned(p, n, static_cast<size_t>(al)); }; |
| void operator delete[](void* p, std::size_t n, std::align_val_t al) noexcept { mi_free_size_aligned(p, n, static_cast<size_t>(al)); }; |
| void operator delete (void* p, std::align_val_t al, const std::nothrow_t&) noexcept { mi_free_aligned(p, static_cast<size_t>(al)); } |
| void operator delete[](void* p, std::align_val_t al, const std::nothrow_t&) noexcept { mi_free_aligned(p, static_cast<size_t>(al)); } |
| |
| void* operator new( std::size_t n, std::align_val_t al) noexcept(false) { return mi_new_aligned(n, static_cast<size_t>(al)); } |
| void* operator new[]( std::size_t n, std::align_val_t al) noexcept(false) { return mi_new_aligned(n, static_cast<size_t>(al)); } |
| void* operator new (std::size_t n, std::align_val_t al, const std::nothrow_t&) noexcept { return mi_new_aligned_nothrow(n, static_cast<size_t>(al)); } |
| void* operator new[](std::size_t n, std::align_val_t al, const std::nothrow_t&) noexcept { return mi_new_aligned_nothrow(n, static_cast<size_t>(al)); } |
| #endif |
| |
| #elif (defined(__GNUC__) || defined(__clang__)) |
| // ------------------------------------------------------ |
| // Override by defining the mangled C++ names of the operators (as |
| // used by GCC and CLang). |
| // See <https://itanium-cxx-abi.github.io/cxx-abi/abi.html#mangling> |
| // ------------------------------------------------------ |
| |
| void _ZdlPv(void* p) MI_FORWARD0(mi_free,p) // delete |
| void _ZdaPv(void* p) MI_FORWARD0(mi_free,p) // delete[] |
| void _ZdlPvm(void* p, size_t n) MI_FORWARD02(mi_free_size,p,n) |
| void _ZdaPvm(void* p, size_t n) MI_FORWARD02(mi_free_size,p,n) |
| void _ZdlPvSt11align_val_t(void* p, size_t al) { mi_free_aligned(p,al); } |
| void _ZdaPvSt11align_val_t(void* p, size_t al) { mi_free_aligned(p,al); } |
| void _ZdlPvmSt11align_val_t(void* p, size_t n, size_t al) { mi_free_size_aligned(p,n,al); } |
| void _ZdaPvmSt11align_val_t(void* p, size_t n, size_t al) { mi_free_size_aligned(p,n,al); } |
| |
| #if (MI_INTPTR_SIZE==8) |
| void* _Znwm(size_t n) MI_FORWARD1(mi_new,n) // new 64-bit |
| void* _Znam(size_t n) MI_FORWARD1(mi_new,n) // new[] 64-bit |
| void* _ZnwmRKSt9nothrow_t(size_t n, mi_nothrow_t tag) { MI_UNUSED(tag); return mi_new_nothrow(n); } |
| void* _ZnamRKSt9nothrow_t(size_t n, mi_nothrow_t tag) { MI_UNUSED(tag); return mi_new_nothrow(n); } |
| void* _ZnwmSt11align_val_t(size_t n, size_t al) MI_FORWARD2(mi_new_aligned, n, al) |
| void* _ZnamSt11align_val_t(size_t n, size_t al) MI_FORWARD2(mi_new_aligned, n, al) |
| void* _ZnwmSt11align_val_tRKSt9nothrow_t(size_t n, size_t al, mi_nothrow_t tag) { MI_UNUSED(tag); return mi_new_aligned_nothrow(n,al); } |
| void* _ZnamSt11align_val_tRKSt9nothrow_t(size_t n, size_t al, mi_nothrow_t tag) { MI_UNUSED(tag); return mi_new_aligned_nothrow(n,al); } |
| #elif (MI_INTPTR_SIZE==4) |
| void* _Znwj(size_t n) MI_FORWARD1(mi_new,n) // new 64-bit |
| void* _Znaj(size_t n) MI_FORWARD1(mi_new,n) // new[] 64-bit |
| void* _ZnwjRKSt9nothrow_t(size_t n, mi_nothrow_t tag) { MI_UNUSED(tag); return mi_new_nothrow(n); } |
| void* _ZnajRKSt9nothrow_t(size_t n, mi_nothrow_t tag) { MI_UNUSED(tag); return mi_new_nothrow(n); } |
| void* _ZnwjSt11align_val_t(size_t n, size_t al) MI_FORWARD2(mi_new_aligned, n, al) |
| void* _ZnajSt11align_val_t(size_t n, size_t al) MI_FORWARD2(mi_new_aligned, n, al) |
| void* _ZnwjSt11align_val_tRKSt9nothrow_t(size_t n, size_t al, mi_nothrow_t tag) { MI_UNUSED(tag); return mi_new_aligned_nothrow(n,al); } |
| void* _ZnajSt11align_val_tRKSt9nothrow_t(size_t n, size_t al, mi_nothrow_t tag) { MI_UNUSED(tag); return mi_new_aligned_nothrow(n,al); } |
| #else |
| #error "define overloads for new/delete for this platform (just for performance, can be skipped)" |
| #endif |
| #endif // __cplusplus |
| |
| // ------------------------------------------------------ |
| // Further Posix & Unix functions definitions |
| // ------------------------------------------------------ |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #ifndef MI_OSX_IS_INTERPOSED |
| // Forward Posix/Unix calls as well |
| void* reallocf(void* p, size_t newsize) MI_FORWARD2(mi_reallocf,p,newsize) |
| size_t malloc_size(const void* p) MI_FORWARD1(mi_usable_size,p) |
| #if !defined(__ANDROID__) && !defined(__FreeBSD__) |
| size_t malloc_usable_size(void *p) MI_FORWARD1(mi_usable_size,p) |
| #else |
| size_t malloc_usable_size(const void *p) MI_FORWARD1(mi_usable_size,p) |
| #endif |
| |
| // No forwarding here due to aliasing/name mangling issues |
| void* valloc(size_t size) { return mi_valloc(size); } |
| void vfree(void* p) { mi_free(p); } |
| size_t malloc_good_size(size_t size) { return mi_malloc_good_size(size); } |
| int posix_memalign(void** p, size_t alignment, size_t size) { return mi_posix_memalign(p, alignment, size); } |
| |
| // `aligned_alloc` is only available when __USE_ISOC11 is defined. |
| // Note: it seems __USE_ISOC11 is not defined in musl (and perhaps other libc's) so we only check |
| // for it if using glibc. |
| // Note: Conda has a custom glibc where `aligned_alloc` is declared `static inline` and we cannot |
| // override it, but both _ISOC11_SOURCE and __USE_ISOC11 are undefined in Conda GCC7 or GCC9. |
| // Fortunately, in the case where `aligned_alloc` is declared as `static inline` it |
| // uses internally `memalign`, `posix_memalign`, or `_aligned_malloc` so we can avoid overriding it ourselves. |
| #if !defined(__GLIBC__) || __USE_ISOC11 |
| void* aligned_alloc(size_t alignment, size_t size) { return mi_aligned_alloc(alignment, size); } |
| #endif |
| #endif |
| |
| // no forwarding here due to aliasing/name mangling issues |
| void cfree(void* p) { mi_free(p); } |
| void* pvalloc(size_t size) { return mi_pvalloc(size); } |
| void* reallocarray(void* p, size_t count, size_t size) { return mi_reallocarray(p, count, size); } |
| int reallocarr(void* p, size_t count, size_t size) { return mi_reallocarr(p, count, size); } |
| void* memalign(size_t alignment, size_t size) { return mi_memalign(alignment, size); } |
| void* _aligned_malloc(size_t alignment, size_t size) { return mi_aligned_alloc(alignment, size); } |
| |
| #if defined(__wasi__) |
| // forward __libc interface (see PR #667) |
| void* __libc_malloc(size_t size) MI_FORWARD1(mi_malloc, size) |
| void* __libc_calloc(size_t count, size_t size) MI_FORWARD2(mi_calloc, count, size) |
| void* __libc_realloc(void* p, size_t size) MI_FORWARD2(mi_realloc, p, size) |
| void __libc_free(void* p) MI_FORWARD0(mi_free, p) |
| void* __libc_memalign(size_t alignment, size_t size) { return mi_memalign(alignment, size); } |
| |
| #elif defined(__GLIBC__) && defined(__linux__) |
| // forward __libc interface (needed for glibc-based Linux distributions) |
| void* __libc_malloc(size_t size) MI_FORWARD1(mi_malloc,size) |
| void* __libc_calloc(size_t count, size_t size) MI_FORWARD2(mi_calloc,count,size) |
| void* __libc_realloc(void* p, size_t size) MI_FORWARD2(mi_realloc,p,size) |
| void __libc_free(void* p) MI_FORWARD0(mi_free,p) |
| void __libc_cfree(void* p) MI_FORWARD0(mi_free,p) |
| |
| void* __libc_valloc(size_t size) { return mi_valloc(size); } |
| void* __libc_pvalloc(size_t size) { return mi_pvalloc(size); } |
| void* __libc_memalign(size_t alignment, size_t size) { return mi_memalign(alignment,size); } |
| int __posix_memalign(void** p, size_t alignment, size_t size) { return mi_posix_memalign(p,alignment,size); } |
| #endif |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #if (defined(__GNUC__) || defined(__clang__)) && !defined(__APPLE__) |
| #pragma GCC visibility pop |
| #endif |
| |
| #endif // MI_MALLOC_OVERRIDE && !_WIN32 |