Insights-compatible memory tracking (#214)

This change introduces support for tracing of memory allocation activity. The code is ported from UE5, and Unreal Insights can be used to analyze the output. This is currently only fully supported on Windows, but will be extended to Mac/Linux in the near future.

To activate full memory tracking, pass `--trace=memory` on the commandline alongside `--tracehost=<ip>` or `-tracefile=<path>`. For more control over how much detail is traced you can instead pass some combination of `callstack`, `memtag`, `memalloc` instead. In practice, `--trace=memory` is an alias for `--trace=callstack,memtag,memalloc`). For convenience we also support `--trace=memory_light` which omits call stacks.

This change also introduces multiple memory allocators, which may be selected via command-line option `--malloc=<allocator>`:

* `mimalloc` - mimalloc (default, same as before)
* `rpmalloc` - rpmalloc is another high performance allocator for multithreaded applications which may be a better option than mimalloc (to be evaluated). Due to toolchain limitations this is currently only supported on Windows.
* `stomp` - an allocator intended to be used during development/debugging to help track down memory issues such as use-after-free or out-of-bounds access. Currently only supported on Windows.
* `ansi` - fallback to default system allocator

1 files changed, 367 insertions, 0 deletions

diff --git a/thirdparty/rpmalloc/malloc.c b/thirdparty/rpmalloc/malloc.c
new file mode 100644
index 000000000..835eff18e
--- /dev/null
+++ b/thirdparty/rpmalloc/malloc.c
@@ -0,0 +1,367 @@
+/* malloc.c  -  Memory allocator  -  Public Domain  -  2016 Mattias Jansson
+ *
+ * This library provides a cross-platform lock free thread caching malloc implementation in C11.
+ * The latest source code is always available at
+ *
+ * https://github.com/mjansson/rpmalloc
+ *
+ * This library is put in the public domain; you can redistribute it and/or modify it without any restrictions.
+ *
+ */
+
+/* clang-format off */
+
+//
+// This file provides overrides for the standard library malloc entry points for C and new/delete operators for C++
+// It also provides automatic initialization/finalization of process and threads
+//
+
+#if defined(__TINYC__)
+#include <sys/types.h>
+#endif
+
+#if (defined(__GNUC__) || defined(__clang__))
+#pragma GCC visibility push(default)
+#endif
+
+#define USE_IMPLEMENT 1
+#define USE_INTERPOSE 0
+#define USE_ALIAS 0
+
+#if defined(__APPLE__)
+#undef USE_INTERPOSE
+#define USE_INTERPOSE 1
+
+typedef struct interpose_t {
+	void* new_func;
+	void* orig_func;
+} interpose_t;
+
+#define MAC_INTERPOSE_PAIR(newf, oldf) 	{ (void*)newf, (void*)oldf }
+#define MAC_INTERPOSE_SINGLE(newf, oldf) \
+__attribute__((used)) static const interpose_t macinterpose##newf##oldf \
+__attribute__ ((section("__DATA, __interpose"))) = MAC_INTERPOSE_PAIR(newf, oldf)
+
+#endif
+
+#if !defined(_WIN32) && !defined(__APPLE__)
+#undef USE_IMPLEMENT
+#undef USE_ALIAS
+#define USE_IMPLEMENT 0
+#define USE_ALIAS 1
+#endif
+
+#ifdef _MSC_VER
+#pragma warning (disable : 4100)
+#undef malloc
+#undef free
+#undef calloc
+#endif
+
+#if ENABLE_OVERRIDE
+
+typedef struct rp_nothrow_t { int __dummy; } rp_nothrow_t;
+
+#if USE_INTERPOSE || USE_ALIAS
+
+static void* rpmalloc_nothrow(size_t size, rp_nothrow_t t) { (void)sizeof(t); return rpmalloc(size); }
+static void* rpaligned_alloc_reverse(size_t size, size_t align) { return rpaligned_alloc(align, size); }
+static void* rpaligned_alloc_reverse_nothrow(size_t size, size_t align, rp_nothrow_t t) { (void)sizeof(t); return rpaligned_alloc(align, size); }
+static void rpfree_size(void* p, size_t size) { (void)sizeof(size); rpfree(p); }
+static void rpfree_aligned(void* p, size_t align) { (void)sizeof(align); rpfree(p); }
+static void rpfree_size_aligned(void* p, size_t size, size_t align) { (void)sizeof(size); (void)sizeof(align); rpfree(p); }
+
+#endif
+
+extern inline void* RPMALLOC_CDECL rpvalloc(size_t size) {
+	return rpaligned_alloc(os_page_size, size);
+}
+
+extern inline void* RPMALLOC_CDECL
+rppvalloc(size_t size) {
+	const size_t page_size = os_page_size;
+	const size_t aligned_size = ((size + page_size - 1) / page_size) * page_size;
+#if ENABLE_VALIDATE_ARGS
+	if (aligned_size < size) {
+		errno = EINVAL;
+		return 0;
+	}
+#endif
+	return rpaligned_alloc(os_page_size, aligned_size);
+}
+
+extern inline void* RPMALLOC_CDECL
+rpreallocarray(void* ptr, size_t count, size_t size) {
+	size_t total;
+#if ENABLE_VALIDATE_ARGS
+#ifdef _MSC_VER
+	int err = SizeTMult(count, size, &total);
+	if ((err != S_OK) || (total >= MAX_ALLOC_SIZE)) {
+		errno = EINVAL;
+		return 0;
+	}
+#else
+	int err = __builtin_umull_overflow(count, size, &total);
+	if (err || (total >= MAX_ALLOC_SIZE)) {
+		errno = EINVAL;
+		return 0;
+	}
+#endif
+#else
+	total = count * size;
+#endif
+	return rprealloc(ptr, total);
+}
+
+#if USE_IMPLEMENT
+
+extern inline void* RPMALLOC_CDECL malloc(size_t size) { return rpmalloc(size); }
+extern inline void* RPMALLOC_CDECL calloc(size_t count, size_t size) { return rpcalloc(count, size); }
+extern inline void* RPMALLOC_CDECL realloc(void* ptr, size_t size) { return rprealloc(ptr, size); }
+extern inline void* RPMALLOC_CDECL reallocf(void* ptr, size_t size) { return rprealloc(ptr, size); }
+extern inline void* RPMALLOC_CDECL aligned_alloc(size_t alignment, size_t size) { return rpaligned_alloc(alignment, size); }
+extern inline void* RPMALLOC_CDECL memalign(size_t alignment, size_t size) { return rpmemalign(alignment, size); }
+extern inline int RPMALLOC_CDECL posix_memalign(void** memptr, size_t alignment, size_t size) { return rpposix_memalign(memptr, alignment, size); }
+extern inline void RPMALLOC_CDECL free(void* ptr) { rpfree(ptr); }
+extern inline void RPMALLOC_CDECL cfree(void* ptr) { rpfree(ptr); }
+extern inline size_t RPMALLOC_CDECL malloc_usable_size(void* ptr) { return rpmalloc_usable_size(ptr); }
+extern inline size_t RPMALLOC_CDECL malloc_size(void* ptr) { return rpmalloc_usable_size(ptr); }
+extern inline void* RPMALLOC_CDECL valloc(size_t size) { return rpvalloc(size); }
+extern inline void* RPMALLOC_CDECL pvalloc(size_t size) { return rppvalloc(size); }
+extern inline void* RPMALLOC_CDECL reallocarray(void* ptr, size_t count, size_t size) { return rpreallocarray(ptr, count, size); }
+
+#ifdef _WIN32
+extern inline void* RPMALLOC_CDECL _malloc_base(size_t size) { return rpmalloc(size); }
+extern inline void RPMALLOC_CDECL _free_base(void* ptr) { rpfree(ptr); }
+extern inline void* RPMALLOC_CDECL _calloc_base(size_t count, size_t size) { return rpcalloc(count, size); }
+extern inline size_t RPMALLOC_CDECL _msize(void* ptr) { return rpmalloc_usable_size(ptr); }
+extern inline size_t RPMALLOC_CDECL _msize_base(void* ptr) { return rpmalloc_usable_size(ptr); }
+extern inline void* RPMALLOC_CDECL _realloc_base(void* ptr, size_t size) { return rprealloc(ptr, size); }
+#endif
+
+#ifdef _WIN32
+// For Windows, #include <rpnew.h> in one source file to get the C++ operator overrides implemented in your module
+#else
+// Overload the C++ operators using the mangled names (https://itanium-cxx-abi.github.io/cxx-abi/abi.html#mangling)
+// operators delete and delete[]
+#define RPDEFVIS __attribute__((visibility("default")))
+extern void _ZdlPv(void* p); void RPDEFVIS _ZdlPv(void* p) { rpfree(p); }
+extern void _ZdaPv(void* p); void RPDEFVIS _ZdaPv(void* p) { rpfree(p); }
+#if ARCH_64BIT
+// 64-bit operators new and new[], normal and aligned
+extern void* _Znwm(uint64_t size); void* RPDEFVIS _Znwm(uint64_t size) { return rpmalloc(size); }
+extern void* _Znam(uint64_t size); void* RPDEFVIS _Znam(uint64_t size) { return rpmalloc(size); }
+extern void* _Znwmm(uint64_t size, uint64_t align); void* RPDEFVIS _Znwmm(uint64_t size, uint64_t align) { return rpaligned_alloc(align, size); }
+extern void* _Znamm(uint64_t size, uint64_t align); void* RPDEFVIS _Znamm(uint64_t size, uint64_t align) { return rpaligned_alloc(align, size); }
+extern void* _ZnwmSt11align_val_t(uint64_t size, uint64_t align); void* RPDEFVIS _ZnwmSt11align_val_t(uint64_t size, uint64_t align) { return rpaligned_alloc(align, size); }
+extern void* _ZnamSt11align_val_t(uint64_t size, uint64_t align); void* RPDEFVIS _ZnamSt11align_val_t(uint64_t size, uint64_t align) { return rpaligned_alloc(align, size); }
+extern void* _ZnwmRKSt9nothrow_t(uint64_t size, rp_nothrow_t t); void* RPDEFVIS _ZnwmRKSt9nothrow_t(uint64_t size, rp_nothrow_t t) { (void)sizeof(t); return rpmalloc(size); }
+extern void* _ZnamRKSt9nothrow_t(uint64_t size, rp_nothrow_t t); void* RPDEFVIS _ZnamRKSt9nothrow_t(uint64_t size, rp_nothrow_t t) { (void)sizeof(t); return rpmalloc(size); }
+extern void* _ZnwmSt11align_val_tRKSt9nothrow_t(uint64_t size, uint64_t align, rp_nothrow_t t); void* RPDEFVIS _ZnwmSt11align_val_tRKSt9nothrow_t(uint64_t size, uint64_t align, rp_nothrow_t t) { (void)sizeof(t); return rpaligned_alloc(align, size); }
+extern void* _ZnamSt11align_val_tRKSt9nothrow_t(uint64_t size, uint64_t align, rp_nothrow_t t); void* RPDEFVIS _ZnamSt11align_val_tRKSt9nothrow_t(uint64_t size, uint64_t align, rp_nothrow_t t) { (void)sizeof(t); return rpaligned_alloc(align, size); }
+// 64-bit operators sized delete and delete[], normal and aligned
+extern void _ZdlPvm(void* p, uint64_t size); void RPDEFVIS _ZdlPvm(void* p, uint64_t size) { rpfree(p); (void)sizeof(size); }
+extern void _ZdaPvm(void* p, uint64_t size); void RPDEFVIS _ZdaPvm(void* p, uint64_t size) { rpfree(p); (void)sizeof(size); }
+extern void _ZdlPvSt11align_val_t(void* p, uint64_t align); void RPDEFVIS _ZdlPvSt11align_val_t(void* p, uint64_t align) { rpfree(p); (void)sizeof(align); }
+extern void _ZdaPvSt11align_val_t(void* p, uint64_t align); void RPDEFVIS _ZdaPvSt11align_val_t(void* p, uint64_t align) { rpfree(p); (void)sizeof(align); }
+extern void _ZdlPvmSt11align_val_t(void* p, uint64_t size, uint64_t align); void RPDEFVIS _ZdlPvmSt11align_val_t(void* p, uint64_t size, uint64_t align) { rpfree(p); (void)sizeof(size); (void)sizeof(align); }
+extern void _ZdaPvmSt11align_val_t(void* p, uint64_t size, uint64_t align); void RPDEFVIS _ZdaPvmSt11align_val_t(void* p, uint64_t size, uint64_t align) { rpfree(p); (void)sizeof(size); (void)sizeof(align); }
+#else
+// 32-bit operators new and new[], normal and aligned
+extern void* _Znwj(uint32_t size); void* RPDEFVIS _Znwj(uint32_t size) { return rpmalloc(size); }
+extern void* _Znaj(uint32_t size); void* RPDEFVIS _Znaj(uint32_t size) { return rpmalloc(size); }
+extern void* _Znwjj(uint32_t size, uint32_t align); void* RPDEFVIS _Znwjj(uint32_t size, uint32_t align) { return rpaligned_alloc(align, size); }
+extern void* _Znajj(uint32_t size, uint32_t align); void* RPDEFVIS _Znajj(uint32_t size, uint32_t align) { return rpaligned_alloc(align, size); }
+extern void* _ZnwjSt11align_val_t(size_t size, size_t align); void* RPDEFVIS _ZnwjSt11align_val_t(size_t size, size_t align) { return rpaligned_alloc(align, size); }
+extern void* _ZnajSt11align_val_t(size_t size, size_t align); void* RPDEFVIS _ZnajSt11align_val_t(size_t size, size_t align) { return rpaligned_alloc(align, size); }
+extern void* _ZnwjRKSt9nothrow_t(size_t size, rp_nothrow_t t); void* RPDEFVIS _ZnwjRKSt9nothrow_t(size_t size, rp_nothrow_t t) { (void)sizeof(t); return rpmalloc(size); }
+extern void* _ZnajRKSt9nothrow_t(size_t size, rp_nothrow_t t); void* RPDEFVIS _ZnajRKSt9nothrow_t(size_t size, rp_nothrow_t t) { (void)sizeof(t); return rpmalloc(size); }
+extern void* _ZnwjSt11align_val_tRKSt9nothrow_t(size_t size, size_t align, rp_nothrow_t t); void* RPDEFVIS _ZnwjSt11align_val_tRKSt9nothrow_t(size_t size, size_t align, rp_nothrow_t t) { (void)sizeof(t); return rpaligned_alloc(align, size); }
+extern void* _ZnajSt11align_val_tRKSt9nothrow_t(size_t size, size_t align, rp_nothrow_t t); void* RPDEFVIS _ZnajSt11align_val_tRKSt9nothrow_t(size_t size, size_t align, rp_nothrow_t t) { (void)sizeof(t); return rpaligned_alloc(align, size); }
+// 32-bit operators sized delete and delete[], normal and aligned
+extern void _ZdlPvj(void* p, uint64_t size); void RPDEFVIS _ZdlPvj(void* p, uint64_t size) { rpfree(p); (void)sizeof(size); }
+extern void _ZdaPvj(void* p, uint64_t size); void RPDEFVIS _ZdaPvj(void* p, uint64_t size) { rpfree(p); (void)sizeof(size); }
+extern void _ZdlPvSt11align_val_t(void* p, uint32_t align); void RPDEFVIS _ZdlPvSt11align_val_t(void* p, uint64_t a) { rpfree(p); (void)sizeof(align); }
+extern void _ZdaPvSt11align_val_t(void* p, uint32_t align); void RPDEFVIS _ZdaPvSt11align_val_t(void* p, uint64_t a) { rpfree(p); (void)sizeof(align); }
+extern void _ZdlPvjSt11align_val_t(void* p, uint32_t size, uint32_t align); void RPDEFVIS _ZdlPvjSt11align_val_t(void* p, uint64_t size, uint64_t align) { rpfree(p); (void)sizeof(size); (void)sizeof(a); }
+extern void _ZdaPvjSt11align_val_t(void* p, uint32_t size, uint32_t align); void RPDEFVIS _ZdaPvjSt11align_val_t(void* p, uint64_t size, uint64_t align) { rpfree(p); (void)sizeof(size); (void)sizeof(a); }
+#endif
+#endif
+#endif
+
+#if USE_INTERPOSE
+
+__attribute__((used)) static const interpose_t macinterpose_malloc[]
+__attribute__ ((section("__DATA, __interpose"))) = {
+	//new and new[]
+	MAC_INTERPOSE_PAIR(rpmalloc, _Znwm),
+	MAC_INTERPOSE_PAIR(rpmalloc, _Znam),
+	MAC_INTERPOSE_PAIR(rpaligned_alloc_reverse, _Znwmm),
+	MAC_INTERPOSE_PAIR(rpaligned_alloc_reverse, _Znamm),
+	MAC_INTERPOSE_PAIR(rpmalloc_nothrow, _ZnwmRKSt9nothrow_t),
+	MAC_INTERPOSE_PAIR(rpmalloc_nothrow, _ZnamRKSt9nothrow_t),
+	MAC_INTERPOSE_PAIR(rpaligned_alloc_reverse, _ZnwmSt11align_val_t),
+	MAC_INTERPOSE_PAIR(rpaligned_alloc_reverse, _ZnamSt11align_val_t),
+	MAC_INTERPOSE_PAIR(rpaligned_alloc_reverse_nothrow, _ZnwmSt11align_val_tRKSt9nothrow_t),
+	MAC_INTERPOSE_PAIR(rpaligned_alloc_reverse_nothrow, _ZnamSt11align_val_tRKSt9nothrow_t),
+	//delete and delete[]
+	MAC_INTERPOSE_PAIR(rpfree, _ZdlPv),
+	MAC_INTERPOSE_PAIR(rpfree, _ZdaPv),
+	MAC_INTERPOSE_PAIR(rpfree_size, _ZdlPvm),
+	MAC_INTERPOSE_PAIR(rpfree_size, _ZdaPvm),
+	MAC_INTERPOSE_PAIR(rpfree_aligned, _ZdlPvSt11align_val_t),
+	MAC_INTERPOSE_PAIR(rpfree_aligned, _ZdaPvSt11align_val_t),
+	MAC_INTERPOSE_PAIR(rpfree_size_aligned, _ZdlPvmSt11align_val_t),
+	MAC_INTERPOSE_PAIR(rpfree_size_aligned, _ZdaPvmSt11align_val_t),
+	//libc entry points
+	MAC_INTERPOSE_PAIR(rpmalloc, malloc),
+	MAC_INTERPOSE_PAIR(rpmalloc, calloc),
+	MAC_INTERPOSE_PAIR(rprealloc, realloc),
+	MAC_INTERPOSE_PAIR(rprealloc, reallocf),
+	MAC_INTERPOSE_PAIR(rpvalloc, valloc),
+#if defined(__MAC_10_15) && __MAC_OS_X_VERSION_MIN_REQUIRED >= __MAC_10_15
+	MAC_INTERPOSE_PAIR(rpaligned_alloc, aligned_alloc),
+#endif
+	MAC_INTERPOSE_PAIR(rpmemalign, memalign),
+	MAC_INTERPOSE_PAIR(rpposix_memalign, posix_memalign),
+	MAC_INTERPOSE_PAIR(rpfree, free),
+	MAC_INTERPOSE_PAIR(rpfree, cfree),
+	MAC_INTERPOSE_PAIR(rpmalloc_usable_size, malloc_usable_size),
+	MAC_INTERPOSE_PAIR(rpmalloc_usable_size, malloc_size)
+};
+
+#endif
+
+#if USE_ALIAS
+
+#define RPALIAS(fn) __attribute__((alias(#fn), used, visibility("default")));
+
+// Alias the C++ operators using the mangled names (https://itanium-cxx-abi.github.io/cxx-abi/abi.html#mangling)
+
+// operators delete and delete[]
+void _ZdlPv(void* p) RPALIAS(rpfree)
+void _ZdaPv(void* p) RPALIAS(rpfree)
+
+#if ARCH_64BIT
+// 64-bit operators new and new[], normal and aligned
+void* _Znwm(uint64_t size) RPALIAS(rpmalloc)
+void* _Znam(uint64_t size) RPALIAS(rpmalloc)
+void* _Znwmm(uint64_t size, uint64_t align) RPALIAS(rpaligned_alloc_reverse)
+void* _Znamm(uint64_t size, uint64_t align) RPALIAS(rpaligned_alloc_reverse)
+void* _ZnwmSt11align_val_t(size_t size, size_t align) RPALIAS(rpaligned_alloc_reverse)
+void* _ZnamSt11align_val_t(size_t size, size_t align) RPALIAS(rpaligned_alloc_reverse)
+void* _ZnwmRKSt9nothrow_t(size_t size, rp_nothrow_t t) RPALIAS(rpmalloc_nothrow)
+void* _ZnamRKSt9nothrow_t(size_t size, rp_nothrow_t t) RPALIAS(rpmalloc_nothrow)
+void* _ZnwmSt11align_val_tRKSt9nothrow_t(size_t size, size_t align, rp_nothrow_t t) RPALIAS(rpaligned_alloc_reverse_nothrow)
+void* _ZnamSt11align_val_tRKSt9nothrow_t(size_t size, size_t align, rp_nothrow_t t) RPALIAS(rpaligned_alloc_reverse_nothrow)
+// 64-bit operators delete and delete[], sized and aligned
+void _ZdlPvm(void* p, size_t n) RPALIAS(rpfree_size)
+void _ZdaPvm(void* p, size_t n) RPALIAS(rpfree_size)
+void _ZdlPvSt11align_val_t(void* p, size_t a) RPALIAS(rpfree_aligned)
+void _ZdaPvSt11align_val_t(void* p, size_t a) RPALIAS(rpfree_aligned)
+void _ZdlPvmSt11align_val_t(void* p, size_t n, size_t a) RPALIAS(rpfree_size_aligned)
+void _ZdaPvmSt11align_val_t(void* p, size_t n, size_t a) RPALIAS(rpfree_size_aligned)
+#else
+// 32-bit operators new and new[], normal and aligned
+void* _Znwj(uint32_t size) RPALIAS(rpmalloc)
+void* _Znaj(uint32_t size) RPALIAS(rpmalloc)
+void* _Znwjj(uint32_t size, uint32_t align) RPALIAS(rpaligned_alloc_reverse)
+void* _Znajj(uint32_t size, uint32_t align) RPALIAS(rpaligned_alloc_reverse)
+void* _ZnwjSt11align_val_t(size_t size, size_t align) RPALIAS(rpaligned_alloc_reverse)
+void* _ZnajSt11align_val_t(size_t size, size_t align) RPALIAS(rpaligned_alloc_reverse)
+void* _ZnwjRKSt9nothrow_t(size_t size, rp_nothrow_t t) RPALIAS(rpmalloc_nothrow)
+void* _ZnajRKSt9nothrow_t(size_t size, rp_nothrow_t t) RPALIAS(rpmalloc_nothrow)
+void* _ZnwjSt11align_val_tRKSt9nothrow_t(size_t size, size_t align, rp_nothrow_t t) RPALIAS(rpaligned_alloc_reverse_nothrow)
+void* _ZnajSt11align_val_tRKSt9nothrow_t(size_t size, size_t align, rp_nothrow_t t) RPALIAS(rpaligned_alloc_reverse_nothrow)
+// 32-bit operators delete and delete[], sized and aligned
+void _ZdlPvj(void* p, size_t n) RPALIAS(rpfree_size)
+void _ZdaPvj(void* p, size_t n) RPALIAS(rpfree_size)
+void _ZdlPvSt11align_val_t(void* p, size_t a) RPALIAS(rpfree_aligned)
+void _ZdaPvSt11align_val_t(void* p, size_t a) RPALIAS(rpfree_aligned)
+void _ZdlPvjSt11align_val_t(void* p, size_t n, size_t a) RPALIAS(rpfree_size_aligned)
+void _ZdaPvjSt11align_val_t(void* p, size_t n, size_t a) RPALIAS(rpfree_size_aligned)
+#endif
+
+void* malloc(size_t size) RPALIAS(rpmalloc)
+void* calloc(size_t count, size_t size) RPALIAS(rpcalloc)
+void* realloc(void* ptr, size_t size) RPALIAS(rprealloc)
+void* reallocf(void* ptr, size_t size) RPALIAS(rprealloc)
+void* aligned_alloc(size_t alignment, size_t size) RPALIAS(rpaligned_alloc)
+void* memalign(size_t alignment, size_t size) RPALIAS(rpmemalign)
+int posix_memalign(void** memptr, size_t alignment, size_t size) RPALIAS(rpposix_memalign)
+void free(void* ptr) RPALIAS(rpfree)
+void cfree(void* ptr) RPALIAS(rpfree)
+void* reallocarray(void* ptr, size_t count, size_t size) RPALIAS(rpreallocarray)
+void* valloc(size_t size) RPALIAS(rpvalloc)
+void* pvalloc(size_t size) RPALIAS(rppvalloc)
+#if defined(__ANDROID__) || defined(__FreeBSD__)
+size_t malloc_usable_size(const void* ptr) RPALIAS(rpmalloc_usable_size)
+#else
+size_t malloc_usable_size(void* ptr) RPALIAS(rpmalloc_usable_size)
+#endif
+size_t malloc_size(void* ptr) RPALIAS(rpmalloc_usable_size)
+
+// end USE_ALIAS
+#endif
+
+#if defined(__GLIBC__) && defined(__linux__) && 0
+
+void* __libc_malloc(size_t size) RPALIAS(rpmalloc)
+void* __libc_calloc(size_t count, size_t size) RPALIAS(rpcalloc)
+void* __libc_realloc(void* p, size_t size) RPALIAS(rprealloc)
+void __libc_free(void* p) RPALIAS(rpfree)
+void __libc_cfree(void* p) RPALIAS(rpfree)
+
+extern void* __libc_valloc(size_t size);
+extern void* __libc_pvalloc(size_t size);
+
+void*
+__libc_valloc(size_t size) {
+	return valloc(size);
+}
+
+void*
+__libc_pvalloc(size_t size) {
+	return pvalloc(size);
+}
+void* __libc_memalign(size_t align, size_t size) RPALIAS(rpmemalign)
+
+int __posix_memalign(void** p, size_t align, size_t size) RPALIAS(rpposix_memalign)
+
+#endif
+
+// end ENABLE_OVERRIDE
+#endif
+
+#if ENABLE_DYNAMIC_LINK
+
+#ifdef _WIN32
+
+extern __declspec(dllexport) BOOL WINAPI
+DllMain(HINSTANCE instance, DWORD reason, LPVOID reserved);
+
+extern __declspec(dllexport) BOOL WINAPI
+DllMain(HINSTANCE instance, DWORD reason, LPVOID reserved) {
+	(void)sizeof(reserved);
+	(void)sizeof(instance);
+	if (reason == DLL_PROCESS_ATTACH)
+		rpmalloc_initialize(0);
+	else if (reason == DLL_PROCESS_DETACH)
+		rpmalloc_finalize();
+	else if (reason == DLL_THREAD_ATTACH)
+		rpmalloc_thread_initialize();
+	else if (reason == DLL_THREAD_DETACH)
+		rpmalloc_thread_finalize();
+	return TRUE;
+}
+
+#endif
+
+// end ENABLE_DYNAMIC_LINK
+#endif
+
+#if (defined(__GNUC__) || defined(__clang__))
+#pragma GCC visibility pop
+#endif
+
+/* clang-format on */