--- /dev/null
+++ libmalloc/libmalloc-792.41.1/private/malloc_implementation.h
@@ -0,0 +1,118 @@
+/*
+ * Copyright (c) 2018 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@
+ */
+
+/* Private interfaces between libsystem_malloc, libSystem, and MallocStackLogging */
+
+#ifndef _MALLOC_IMPLEMENTATION_H_
+#define _MALLOC_IMPLEMENTATION_H_
+
+#include <TargetConditionals.h>
+
+#include <malloc/malloc.h>
+
+#if !TARGET_OS_EXCLAVECORE && !TARGET_OS_EXCLAVEKIT
+# include <stack_logging.h>
+#endif // !TARGET_OS_EXCLAVECORE && !TARGET_OS_EXCLAVEKIT
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <ptrauth.h>
+
+#include <malloc/_ptrcheck.h>
+__ptrcheck_abi_assume_single()
+
+#if defined(__PTRAUTH_INTRINSICS__) && __PTRAUTH_INTRINSICS__ && \
+		__has_builtin(__builtin_ptrauth_string_discriminator)
+#define LIBMALLOC_FUNCTION_PTRAUTH(f) \
+	__ptrauth(ptrauth_key_function_pointer, 1, \
+			__builtin_ptrauth_string_discriminator("libmalloc_functions_" # f) \
+	) f
+#else
+#define LIBMALLOC_FUNCTION_PTRAUTH(f) f
+#endif
+
+
+/*********	Libsystem initializers ************/
+
+struct _malloc_late_init;
+
+struct _malloc_late_init {
+	unsigned long version;
+	/* The following functions are included in version 1 of this structure */
+	void * (*LIBMALLOC_FUNCTION_PTRAUTH(dlopen)) (const char * __null_terminated path, int mode);
+	void * (*LIBMALLOC_FUNCTION_PTRAUTH(dlsym)) (void *handle, const char * __null_terminated symbol);
+	bool internal_diagnostics;  /* os_variant_has_internal_diagnostics() */
+	/* The following are included in version 2 of this structure */
+	const struct _malloc_msl_symbols *msl;
+};
+
+void __malloc_init(const char * __null_terminated * __null_terminated apple);
+#if !TARGET_OS_EXCLAVECORE && !TARGET_OS_EXCLAVEKIT
+void __malloc_late_init(const struct _malloc_late_init *);
+
+struct _malloc_msl_lite_hooks_s;
+
+struct _malloc_msl_symbols {
+	unsigned long version;
+
+	/* the following are included in version 1 of this structure */
+	void (*handle_memory_event) (unsigned long event);
+	boolean_t (*stack_logging_locked) (void);
+	void (*fork_prepare) (void);
+	void (*fork_parent) (void);
+	void (*fork_child) (void);
+
+	void (*set_flags_from_environment) (const char **env);
+	void (*initialize) (void);
+	boolean_t (*turn_on_stack_logging) (stack_logging_mode_type mode);
+	void (*turn_off_stack_logging) (void);
+	void (*copy_msl_lite_hooks) (struct _malloc_msl_lite_hooks_s *hooksp, size_t size);
+
+	/* the following are included in version 2 of this structure */
+	bool (*stack_logging_locked_v2) (void);
+	bool (*turn_on_stack_logging_v2) (stack_logging_mode_type mode);
+};
+
+/*
+ * Definitions intended for the malloc stack logging library only.
+ * This is SPI that is *not* intended for use elsewhere. It will change
+ * and will eventually be removed, without prior warning.
+ */
+#if defined(MALLOC_ENABLE_MSL_LITE_SPI) && MALLOC_ENABLE_MSL_LITE_SPI
+
+typedef struct szone_s szone_t;
+
+/* Flags which uniquely identify the lite zone's wrapped zone */
+#define MALLOC_MSL_LITE_WRAPPED_ZONE_FLAGS (1 << 10)
+
+typedef struct _malloc_msl_lite_hooks_s {
+	boolean_t (*has_default_zone0)(void);
+	void (*insert_msl_lite_zone)(malloc_zone_t *zone);
+	malloc_zone_t *(*get_global_helper_zone)(void);
+} _malloc_msl_lite_hooks_t;
+
+#endif // defined(MALLOC_ENABLE_MSL_LITE_SPI) && MALLOC_ENABLE_MSL_LITE_SPI
+
+#endif // !TARGET_OS_EXCLAVECORE && !TARGET_OS_EXCLAVEKIT
+
+#endif