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+++ libmalloc/libmalloc-715.100.22/src/base.h
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+/*
+ * Copyright (c) 2015 Apple Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+#ifndef __BASE_H
+#define __BASE_H
+
+#include <stddef.h>
+#include "platform.h"
+
+#include <malloc/_ptrcheck.h>
+__ptrcheck_abi_assume_single()
+
+#ifndef __has_extension
+#define __has_extension(x) 0
+#endif
+
+#if __has_extension(c_static_assert)
+#define MALLOC_STATIC_ASSERT(x, y) _Static_assert((x), y)
+#else
+#define MALLOC_STATIC_ASSERT(x, y)
+#endif
+
+#define MALLOC_ASSERT(e) ({ \
+ if (__builtin_expect(!(e), 0)) { \
+ __asm__ __volatile__ (""); \
+ __builtin_trap(); \
+ } \
+})
+
+#define MALLOC_FATAL_ERROR(cause, message) ({ \
+ _os_set_crash_log_cause_and_message((cause), "FATAL ERROR - " message); \
+ __asm__ __volatile__ (""); \
+ __builtin_trap(); \
+})
+
+#define MALLOC_REPORT_FATAL_ERROR(cause, message) ({ \
+ malloc_report(ASL_LEVEL_ERR, "*** FATAL ERROR - " message ".\n"); \
+ MALLOC_FATAL_ERROR((cause), message); \
+})
+
+#if __has_include(<machine/cpu_capabilities.h>) && (defined(__i386__) || defined(__x86_64__) || defined(__arm__) || defined(__arm64__))
+# define __APPLE_API_PRIVATE
+# include <machine/cpu_capabilities.h>
+# if defined(__i386__) || defined(__x86_64__)
+# define _COMM_PAGE_VERSION_REQD 9
+# else
+# define _COMM_PAGE_VERSION_REQD 3
+# endif
+# undef __APPLE_API_PRIVATE
+#elif __has_include(<sys/sysctl.h>)
+# include <sys/sysctl.h>
+#endif
+
+#if defined(__i386__) || defined(__x86_64__)
+// <rdar://problem/23495834> nano vs. magazine have different definitions
+// for this cache-line size.
+# define MALLOC_CACHE_LINE 128
+# define MALLOC_NANO_CACHE_LINE 64
+#elif defined(__arm__) || defined(__arm64__)
+# define MALLOC_CACHE_LINE 128
+# define MALLOC_NANO_CACHE_LINE 64
+#else
+# define MALLOC_CACHE_LINE 32
+# define MALLOC_NANO_CACHE_LINE 32
+#endif
+
+#define MALLOC_CACHE_ALIGN __attribute__ ((aligned (MALLOC_CACHE_LINE) ))
+#define MALLOC_NANO_CACHE_ALIGN __attribute__ ((aligned (MALLOC_NANO_CACHE_LINE) ))
+#define MALLOC_EXPORT extern __attribute__((visibility("default")))
+#define MALLOC_NOEXPORT __attribute__((visibility("hidden")))
+#define MALLOC_NOINLINE __attribute__((noinline))
+#define MALLOC_INLINE __inline__
+#define MALLOC_ALWAYS_INLINE __attribute__((always_inline))
+#define MALLOC_PACKED __attribute__((packed))
+#define MALLOC_USED __attribute__((used))
+#define MALLOC_UNUSED __attribute__((unused))
+#define MALLOC_NORETURN __attribute__((noreturn))
+#define MALLOC_COLD __attribute__((cold))
+#define MALLOC_NOESCAPE __attribute__((noescape))
+#define MALLOC_PRESERVE_MOST __attribute__((preserve_most))
+#define MALLOC_FALLTHROUGH __attribute__((fallthrough))
+#define CHECK_MAGAZINE_PTR_LOCKED(szone, mag_ptr, fun) {}
+
+#if __has_feature(bounds_safety)
+#define __malloc_bidi_indexable __bidi_indexable
+#else
+#define __malloc_bidi_indexable
+#endif
+
+#define SCRIBBLE_BYTE 0xaa /* allocated scribble */
+#define SCRABBLE_BYTE 0x55 /* free()'d scribble */
+#define SCRUBBLE_BYTE 0xdd /* madvise(..., MADV_FREE) scriblle */
+
+#undef KiB
+#undef MiB
+#undef GiB
+#undef TiB
+#define KiB(x) ((uint64_t)(x) << 10)
+#define MiB(x) ((uint64_t)(x) << 20)
+#define GiB(x) ((uint64_t)(x) << 30)
+#define TiB(x) ((uint64_t)(x) << 40)
+
+#define NDEBUG 1
+#define trunc_page_quanta(x) trunc_page((x))
+#define round_page_quanta(x) round_page((x))
+#define vm_page_quanta_size (vm_page_size)
+#define vm_page_quanta_shift (vm_page_shift)
+
+/*
+ * Large rounds allocation sizes up to MAX(vm_kernel_page_size, page_size).
+ * This provides better death row caching performance when vm_kernel_page_size > page_size.
+ * The kernel allocates pages of vm_kernel_page_size to back our allocations,
+ * so there is no additional physical page cost to doing this.
+ * Guard pages are the same size to ensure the full vm allocation size is a multiple of MAX(vm_kernel_page_size, page_size).
+ */
+#define large_vm_page_quanta_size (vm_kernel_page_size > vm_page_size ? vm_kernel_page_size : vm_page_size)
+#define large_vm_page_quanta_mask (vm_kernel_page_mask > vm_page_mask ? vm_kernel_page_mask : vm_page_mask)
+#define large_vm_page_quanta_shift (vm_kernel_page_shift > vm_page_shift ? vm_kernel_page_shift : vm_page_shift)
+
+#define trunc_large_page_quanta(x) ((x) & (~large_vm_page_quanta_mask))
+#define round_large_page_quanta(x) (trunc_large_page_quanta((x) + large_vm_page_quanta_mask))
+
+/*
+ * MALLOC_ABSOLUTE_MAX_SIZE - There are many instances of addition to a
+ * user-specified size_t, which can cause overflow (and subsequent crashes)
+ * for values near SIZE_T_MAX. Rather than add extra "if" checks everywhere
+ * this occurs, it is easier to just set an absolute maximum request size,
+ * and immediately return an error if the requested size exceeds this maximum.
+ * Of course, values less than this absolute max can fail later if the value
+ * is still too large for the available memory. The largest value added
+ * seems to be large_vm_page_quanta_size (in the macro round_large_page_quanta()), so to be safe, we set
+ * the maximum to be 2 * PAGE_SIZE less than SIZE_T_MAX.
+ *
+ * This value needs to be calculated at runtime, so we'll cache it rather than
+ * recalculate on each use.
+ */
+#define _MALLOC_ABSOLUTE_MAX_SIZE (SIZE_T_MAX - (2 * large_vm_page_quanta_size))
+
+#if defined(MALLOC_BUILDING_XCTESTS)
+#define malloc_absolute_max_size _MALLOC_ABSOLUTE_MAX_SIZE
+#else
+extern size_t malloc_absolute_max_size; // caches the definition above
+#endif
+
+#if !MALLOC_TARGET_EXCLAVES
+#define malloc_too_large(n) ((n) > malloc_absolute_max_size)
+#else
+#define malloc_too_large(n) (0)
+#endif // !MALLOC_TARGET_EXCLAVES
+
+#if MALLOC_TARGET_EXCLAVES && !defined(MAX)
+#define MAX(a, b) (((a)>(b))?(a):(b))
+#endif // MALLOC_TARGET_EXCLAVES && !defined(MAX)
+
+// add a guard page before each VM region to help debug
+#define MALLOC_ADD_PRELUDE_GUARD_PAGE (1 << 0)
+// add a guard page after each VM region to help debug
+#define MALLOC_ADD_POSTLUDE_GUARD_PAGE (1 << 1)
+// Mask both guard page flags
+#define MALLOC_ADD_GUARD_PAGE_FLAGS (MALLOC_ADD_PRELUDE_GUARD_PAGE|MALLOC_ADD_POSTLUDE_GUARD_PAGE)
+// apply guard pages to all regions
+#define MALLOC_GUARD_ALL (1 << 2)
+// Mask for guard page request flags
+#define MALLOC_ALL_GUARD_PAGE_FLAGS (MALLOC_ADD_GUARD_PAGE_FLAGS|MALLOC_GUARD_ALL)
+// do not protect prelude page
+#define MALLOC_DONT_PROTECT_PRELUDE (1 << 3)
+// do not protect postlude page
+#define MALLOC_DONT_PROTECT_POSTLUDE (1 << 4)
+// write 0x55 onto free blocks
+#define MALLOC_DO_SCRIBBLE (1 << 5)
+// call abort() on any malloc error, such as double free or out of memory.
+#define MALLOC_ABORT_ON_ERROR (1 << 6)
+// allocate objects such that they may be used with VM purgability APIs
+#define MALLOC_PURGEABLE (1 << 7)
+// call abort() on malloc errors, but not on out of memory.
+#define MALLOC_ABORT_ON_CORRUPTION (1 << 8)
+// don't populate the mapping for this allocation
+#define MALLOC_NO_POPULATE (1 << 9)
+// enable faulting anywhere within this allocation
+#define MALLOC_CAN_FAULT (1 << 12)
+
+// See malloc_implementation.h
+// MALLOC_MSL_LITE_WRAPPED_ZONE_FLAGS == (1 << 10)
+
+
+/*
+ * These commpage routines provide fast access to the logical cpu number
+ * of the calling processor assuming no pre-emption occurs.
+ */
+
+extern unsigned int hyper_shift;
+extern unsigned int logical_ncpus;
+extern unsigned int phys_ncpus;
+#if CONFIG_CLUSTER_AWARE
+extern unsigned int ncpuclusters;
+#endif // CONFIG_CLUSTER_AWARE
+
+/*
+ * msize - a type to refer to the number of quanta of a tiny or small
+ * allocation. A tiny block with an msize of 3 would be 3 << SHIFT_TINY_QUANTUM
+ * bytes in size.
+ */
+typedef unsigned short msize_t;
+
+typedef unsigned int grain_t; // N.B. wide enough to index all free slots
+typedef struct large_entry_s large_entry_t;
+typedef struct szone_s szone_t;
+typedef struct rack_s rack_t;
+typedef struct magazine_s magazine_t;
+typedef int mag_index_t;
+typedef void * __single region_t;
+
+#endif // __BASE_H