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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 | /* * Copyright (c) 2022 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 __MALLOC_TYPE_INTERNAL_H__ #define __MALLOC_TYPE_INTERNAL_H__ #if MALLOC_TARGET_64BIT MALLOC_ALWAYS_INLINE MALLOC_INLINE static malloc_type_descriptor_t malloc_get_tsd_type_descriptor(void) { return (malloc_type_descriptor_t){ .storage = _pthread_getspecific_direct(__TSD_MALLOC_TYPE_DESCRIPTOR), }; } MALLOC_ALWAYS_INLINE MALLOC_INLINE static uint64_t malloc_get_tsd_type_id(void) { return malloc_get_tsd_type_descriptor().type_id; } MALLOC_ALWAYS_INLINE MALLOC_INLINE static void malloc_set_tsd_type_descriptor(malloc_type_descriptor_t type_desc) { _pthread_setspecific_direct(__TSD_MALLOC_TYPE_DESCRIPTOR, type_desc.storage); } // TODO: can we get a guarantee from the compiler that no valid type ID will // ever have this value? #define MALLOC_TYPE_ID_NONE 0ull #define MALLOC_TYPE_ID_NONZERO 1ull #define MALLOC_TYPE_DESCRIPTOR_NONE (malloc_type_descriptor_t){ 0 } union malloc_type_layout_bits_u { uint16_t bits; malloc_type_layout_semantics_t layout; }; MALLOC_ALWAYS_INLINE MALLOC_INLINE static bool malloc_type_descriptor_is_pure_data(malloc_type_descriptor_t type_desc) { static const union malloc_type_layout_bits_u data_layout = { .layout = { .generic_data = true, }, }; union malloc_type_layout_bits_u type_desc_layout = { .layout = type_desc.summary.layout_semantics, }; return type_desc_layout.bits == data_layout.bits; } MALLOC_ALWAYS_INLINE MALLOC_INLINE static bool malloc_type_descriptor_is_uninferred(malloc_type_descriptor_t type_desc) { return type_desc.summary.type_kind == MALLOC_TYPE_KIND_C && type_desc.summary.callsite_flags == MALLOC_TYPE_CALLSITE_FLAGS_NONE; } #else // MALLOC_TARGET_64BIT MALLOC_ALWAYS_INLINE MALLOC_INLINE static uint64_t malloc_get_tsd_type_id(void) { return 0; } #endif // MALLOC_TARGET_64BIT MALLOC_NOEXPORT extern bool malloc_interposition_compat; MALLOC_NOEXPORT void _malloc_detect_interposition(void); #endif // __MALLOC_TYPE_INTERNAL_H__ |