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6606850232
Add a `SWIFT_STDLIB_OVERRIDABLE_RETAIN_RELEASE` CMake option. When set to true, swift_retain/release and the other functions in InstrumentsSupport.h can be overridden by setting the appropriate global function pointer, as is already the case. When set to false, those function pointers are removed and the functions always go into the default implementation. Set `SWIFT_STDLIB_OVERRIDABLE_RETAIN_RELEASE` to false when building the minimal stdlib, and set it to true otherwise by default. rdar://115987924
70 lines
2.5 KiB
C++
70 lines
2.5 KiB
C++
//===--- InstrumentsSupport.h - Support for Instruments.app -----*- C++ -*-===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// Swift runtime support for instruments.app
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// In the long run, they plan to use dyld to make this indirection go away.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_RUNTIME_INSTRUMENTS_SUPPORT_H
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#define SWIFT_RUNTIME_INSTRUMENTS_SUPPORT_H
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#define SWIFT_RT_DECLARE_ENTRY \
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__ptrauth_swift_runtime_function_entry
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namespace swift {
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#ifdef SWIFT_STDLIB_OVERRIDABLE_RETAIN_RELEASE
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// liboainject patches the function pointers and calls the functions below.
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SWIFT_RUNTIME_EXPORT
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HeapObject *(*SWIFT_RT_DECLARE_ENTRY _swift_allocObject)(
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HeapMetadata const *metadata,
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size_t requiredSize,
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size_t requiredAlignmentMask);
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SWIFT_RUNTIME_EXPORT
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HeapObject *(*SWIFT_RT_DECLARE_ENTRY _swift_retain)(HeapObject *object);
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SWIFT_RUNTIME_EXPORT
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HeapObject *(*SWIFT_RT_DECLARE_ENTRY _swift_retain_n)(HeapObject *object, uint32_t n);
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SWIFT_RUNTIME_EXPORT
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HeapObject *(*SWIFT_RT_DECLARE_ENTRY _swift_tryRetain)(HeapObject *object);
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SWIFT_RUNTIME_EXPORT
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void (*SWIFT_RT_DECLARE_ENTRY _swift_release)(HeapObject *object);
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SWIFT_RUNTIME_EXPORT
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void (*SWIFT_RT_DECLARE_ENTRY _swift_release_n)(HeapObject *object, uint32_t n);
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SWIFT_RUNTIME_EXPORT
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size_t swift_retainCount(HeapObject *object);
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// liboainject tries to patch the function pointers and call the functions below
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// Swift used to implement these but no longer does.
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// Do not reuse these names unless you do what oainject expects you to do.
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SWIFT_RUNTIME_EXPORT
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void *(*_swift_alloc)(size_t idx);
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SWIFT_RUNTIME_EXPORT
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void *(*_swift_tryAlloc)(size_t idx);
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SWIFT_RUNTIME_EXPORT
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void *(*_swift_slowAlloc)(size_t bytes, size_t alignMask, uintptr_t flags);
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SWIFT_RUNTIME_EXPORT
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void (*_swift_dealloc)(void *ptr, size_t idx);
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SWIFT_RUNTIME_EXPORT
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void (*_swift_slowDealloc)(void *ptr, size_t bytes, size_t alignMask);
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SWIFT_RUNTIME_EXPORT
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size_t _swift_indexToSize(size_t idx);
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SWIFT_RUNTIME_EXPORT
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void _swift_zone_init(void);
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#endif // SWIFT_STDLIB_OVERRIDABLE_RETAIN_RELEASE
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}
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#endif
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