--- /dev/null
+++ libmalloc/libmalloc-792.41.1/src/platform.h
@@ -0,0 +1,301 @@
+/*
+ * 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 __PLATFORM_H
+#define __PLATFORM_H
+
+#include <TargetConditionals.h>
+
+#ifndef MALLOC_TARGET_DK_OSX
+#define MALLOC_TARGET_DK_OSX 0
+#endif // MALLOC_TARGET_DK_OSX
+
+#ifndef MALLOC_TARGET_DK_IOS
+#define MALLOC_TARGET_DK_IOS 0
+#endif // MALLOC_TARGET_DK_IOS
+
+#ifndef MALLOC_TARGET_DK_VISIONOS
+#define MALLOC_TARGET_DK_VISIONOS 0
+#endif // MALLOC_TARGET_DK_VISIONOS
+
+#ifndef MALLOC_TARGET_DK_WATCH
+#define MALLOC_TARGET_DK_WATCH 0
+#endif // MALLOC_TARGET_DK_WATCH
+
+#ifndef MALLOC_TARGET_EXCLAVES_INTROSPECTOR
+#define MALLOC_TARGET_EXCLAVES_INTROSPECTOR 0
+#endif // MALLOC_TARGET_EXCLAVES_INTROSPECTOR
+
+#if (TARGET_OS_IPHONE && !TARGET_OS_SIMULATOR) || (TARGET_OS_DRIVERKIT && !MALLOC_TARGET_DK_OSX)
+#define MALLOC_TARGET_IOS 1
+#else // (TARGET_OS_IPHONE && !TARGET_OS_SIMULATOR) || (TARGET_OS_DRIVERKIT && !MALLOC_TARGET_DK_OSX)
+#define MALLOC_TARGET_IOS 0
+#endif // (TARGET_OS_IPHONE && !TARGET_OS_SIMULATOR) || (TARGET_OS_DRIVERKIT && !MALLOC_TARGET_DK_OSX)
+
+#if TARGET_OS_IOS && !TARGET_OS_VISION
+#define MALLOC_TARGET_IOS_ONLY 1
+#else
+#define MALLOC_TARGET_IOS_ONLY 0
+#endif
+
+#ifdef __LP64__
+#define MALLOC_TARGET_64BIT 1
+#else // __LP64__
+#define MALLOC_TARGET_64BIT 0
+#endif
+
+#if !defined(TARGET_OS_EXCLAVECORE)
+#define TARGET_OS_EXCLAVECORE 0
+#endif
+
+#if !defined(TARGET_OS_EXCLAVEKIT)
+#define TARGET_OS_EXCLAVEKIT 0
+#endif
+
+#if TARGET_OS_EXCLAVECORE || TARGET_OS_EXCLAVEKIT
+#define MALLOC_TARGET_EXCLAVES 1
+#else // TARGET_OS_EXCLAVECORE || TARGET_OS_EXCLAVEKIT
+#define MALLOC_TARGET_EXCLAVES 0
+#endif // TARGET_OS_EXCLAVECORE || TARGET_OS_EXCLAVEKIT
+
+// <rdar://problem/12596555>
+#define CONFIG_RECIRC_DEPOT 1
+#define CONFIG_AGGRESSIVE_MADVISE 1
+
+#if MALLOC_TARGET_IOS
+# define DEFAULT_AGGRESSIVE_MADVISE_ENABLED true
+// <rdar://problem/12596555>
+# define CONFIG_MADVISE_PRESSURE_RELIEF 0
+#else // MALLOC_TARGET_IOS
+# define DEFAULT_AGGRESSIVE_MADVISE_ENABLED false
+// <rdar://problem/12596555>
+# define CONFIG_MADVISE_PRESSURE_RELIEF 1
+#endif // MALLOC_TARGET_IOS
+
+// <rdar://problem/10397726>
+#define CONFIG_RELAXED_INVARIANT_CHECKS 1
+
+// <rdar://problem/19818071>
+#define CONFIG_MADVISE_STYLE MADV_FREE_REUSABLE
+
+#if MALLOC_TARGET_64BIT && !TARGET_OS_WATCH && !MALLOC_TARGET_EXCLAVES
+#define CONFIG_NANOZONE 1
+#else
+#define CONFIG_NANOZONE 0
+#endif
+
+#if MALLOC_TARGET_64BIT
+#define CONFIG_ASLR_INTERNAL 0
+#else // MALLOC_TARGET_64BIT
+#define CONFIG_ASLR_INTERNAL 1
+#endif // MALLOC_TARGET_64BIT
+
+// enable nano checking for corrupt free list
+#define NANO_FREE_DEQUEUE_DILIGENCE 1
+
+// Conditional behaviour depends on MallocSpaceEfficient being set by
+// JetsamProperties which isn't true on iOS
+#if MALLOC_TARGET_IOS || TARGET_OS_DRIVERKIT
+#define NANOV2_DEFAULT_MODE NANO_ENABLED
+#else
+#define NANOV2_DEFAULT_MODE NANO_CONDITIONAL
+#endif
+
+// whether to pre-reserve all available nano regions during initialization
+#define CONFIG_NANO_RESERVE_REGIONS 0
+
+
+// This governs a last-free cache of 1 that bypasses the free-list for each region size
+#define CONFIG_TINY_CACHE 1
+#define CONFIG_SMALL_CACHE 1
+#define CONFIG_MEDIUM_CACHE 1
+
+// medium allocator enabled or disabled
+#if MALLOC_TARGET_64BIT
+#if MALLOC_TARGET_IOS
+#define CONFIG_MEDIUM_ALLOCATOR 0
+#else // MALLOC_TARGET_IOS
+#define CONFIG_MEDIUM_ALLOCATOR 1
+#endif // MALLOC_TARGET_IOS
+#else // MALLOC_TARGET_64BIT
+#define CONFIG_MEDIUM_ALLOCATOR 0
+#endif // MALLOC_TARGET_64BIT
+
+
+#if CONFIG_MEDIUM_ALLOCATOR
+#define DEFAULT_MEDIUM_ALLOCATOR_ENABLED 1
+#else // CONFIG_MEDIUM_ALLOCATOR
+#define DEFAULT_MEDIUM_ALLOCATOR_ENABLED 0
+#endif // CONFIG_MEDIUM_ALLOCATOR
+
+
+// The large last-free cache (aka. death row cache)
+#if TARGET_OS_OSX
+#define CONFIG_LARGE_CACHE 1
+# define DEFAULT_LARGE_CACHE_ENABLED true
+#else // !TARGET_OS_OSX
+#define CONFIG_LARGE_CACHE 0
+# define DEFAULT_LARGE_CACHE_ENABLED false
+#endif // TARGET_OS_OSX
+
+// Deferred reclaim
+#if (MALLOC_TARGET_IOS_ONLY && !TARGET_OS_SIMULATOR) || \
+		(TARGET_OS_VISION && !TARGET_OS_SIMULATOR) || \
+		(MALLOC_TARGET_64BIT && TARGET_OS_DRIVERKIT && !MALLOC_TARGET_DK_OSX) || \
+		TARGET_OS_OSX
+#define CONFIG_MAGAZINE_DEFERRED_RECLAIM 0
+#define CONFIG_XZM_DEFERRED_RECLAIM 1
+#else
+#define CONFIG_MAGAZINE_DEFERRED_RECLAIM 0
+#define CONFIG_XZM_DEFERRED_RECLAIM 0
+#endif // MALLOC_TARGET_IOS && MALLOC_TARGET_64BIT
+
+#if CONFIG_MAGAZINE_DEFERRED_RECLAIM && !CONFIG_LARGE_CACHE
+#error "Deferred reclaim requires large cache"
+#endif // CONFIG_MAGAZINE_DEFERRED_RECLAIM && !CONFIG_LARGE_CACHE
+
+#if MALLOC_TARGET_IOS || MALLOC_TARGET_EXCLAVES
+// The VM system on iOS forces malloc-tagged memory to never be marked as
+// copy-on-write, this would include calls we make to vm_copy. Given that the
+// kernel would just be doing a memcpy, we force it to happen in userspace.
+#define CONFIG_REALLOC_CAN_USE_VMCOPY 0
+#else
+#define CONFIG_REALLOC_CAN_USE_VMCOPY 1
+#endif
+
+#if !TARGET_OS_DRIVERKIT && (!TARGET_OS_OSX || MALLOC_TARGET_64BIT)
+#define CONFIG_FEATUREFLAGS_SIMPLE 1
+#else
+#define CONFIG_FEATUREFLAGS_SIMPLE 0
+#endif
+
+// presence of commpage memsize
+#define CONFIG_HAS_COMMPAGE_MEMSIZE 1
+
+// presence of commpage number of cpu count
+#define CONFIG_HAS_COMMPAGE_NCPUS 1
+
+// Distribute magazines by cluster number if nmagazines == nclusters
+#if (MALLOC_TARGET_IOS_ONLY && !TARGET_OS_SIMULATOR) || \
+		MALLOC_TARGET_DK_IOS || \
+		TARGET_OS_OSX || MALLOC_TARGET_DK_OSX
+#define CONFIG_MAGAZINE_PER_CLUSTER 1
+#else
+#define CONFIG_MAGAZINE_PER_CLUSTER 0
+#endif
+
+// Support cluster-aware policies in xzone malloc
+#if ((TARGET_OS_IOS || TARGET_OS_VISION) && !TARGET_OS_SIMULATOR) || \
+		MALLOC_TARGET_DK_IOS || MALLOC_TARGET_DK_VISIONOS || \
+		TARGET_OS_OSX || MALLOC_TARGET_DK_OSX || \
+		(TARGET_OS_WATCH && !TARGET_OS_SIMULATOR) || MALLOC_TARGET_DK_WATCH
+#define CONFIG_XZM_CLUSTER_AWARE 1
+#else
+#define CONFIG_XZM_CLUSTER_AWARE 0
+#endif
+
+// Build with supporting logic for cluster awareness in either allocator
+#if CONFIG_MAGAZINE_PER_CLUSTER || CONFIG_XZM_CLUSTER_AWARE
+#define CONFIG_CLUSTER_AWARE 1
+#else
+#define CONFIG_CLUSTER_AWARE 0
+#endif
+
+// Use of hyper-shift for magazine selection.
+#define CONFIG_NANO_USES_HYPER_SHIFT 0
+#define CONFIG_SZONE_USES_HYPER_SHIFT 0
+
+#if TARGET_OS_OSX
+#define CONFIG_CHECK_PLATFORM_BINARY 1
+#else
+#define CONFIG_CHECK_PLATFORM_BINARY 0
+#endif
+
+#define MALLOC_ZERO_POLICY_DEFAULT MALLOC_ZERO_ON_FREE
+
+#if MALLOC_TARGET_64BIT
+#define CONFIG_XZONE_MALLOC 1
+#else
+#define CONFIG_XZONE_MALLOC 0
+#endif
+
+#if CONFIG_XZONE_MALLOC && MALLOC_TARGET_IOS
+#define CONFIG_VM_USER_RANGES 1
+#else
+#define CONFIG_VM_USER_RANGES 0
+#endif
+
+#if CONFIG_XZONE_MALLOC && TARGET_CPU_ARM64 && (TARGET_OS_OSX || MALLOC_TARGET_DK_OSX)
+#define CONFIG_MACOS_RANGES 1
+#else
+#define CONFIG_MACOS_RANGES 0
+#endif
+
+#define MALLOC_XZONE_NANO_ENABLED_DEFAULT false
+
+#if CONFIG_XZONE_MALLOC && (MALLOC_TARGET_IOS || TARGET_OS_OSX || MALLOC_TARGET_DK_OSX)
+#define CONFIG_MADV_ZERO 1
+#else
+#define CONFIG_MADV_ZERO 0
+#endif
+
+#if CONFIG_XZONE_MALLOC && (MALLOC_TARGET_DK_VISIONOS || \
+		MALLOC_TARGET_DK_IOS || (MALLOC_TARGET_DK_OSX && TARGET_CPU_ARM64) || \
+		MALLOC_TARGET_DK_WATCH)
+#define MALLOC_XZONE_ENABLED_DEFAULT true
+#endif
+
+#ifndef MALLOC_XZONE_ENABLED_DEFAULT
+#define MALLOC_XZONE_ENABLED_DEFAULT false
+#endif
+
+#if MALLOC_TARGET_64BIT
+#define CONFIG_EARLY_MALLOC 1
+#else
+#define CONFIG_EARLY_MALLOC 0
+#endif
+
+#if MALLOC_TARGET_IOS_ONLY || TARGET_OS_VISION || TARGET_OS_OSX || TARGET_OS_WATCH
+#define CONFIG_MALLOC_PROCESS_IDENTITY 1
+#else
+#define CONFIG_MALLOC_PROCESS_IDENTITY 0
+#endif
+
+#ifndef CONFIG_SANITIZER
+#define CONFIG_SANITIZER 1
+#endif
+
+#define MALLOC_SECURE_ALLOCATOR_LAUNCHD_ENABLED_DEFAULT true
+
+// We need to define CONFIG_MTE here in case it's not defined, as it means
+// we're compiling a target for which we're not setting it through
+// GCC_PREPROCESSOR_DEFINITIONS in the Xcode config.
+#ifndef CONFIG_MTE
+#define CONFIG_MTE 0
+#endif
+
+#ifndef HEADER_MTE
+#define HEADER_MTE CONFIG_MTE
+#endif
+
+#endif // __PLATFORM_H