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7eff49c1b6
Most SwiftShims were put in the swift namespace in C++ mode which broke certain things when importing them in a swift file in C++ mode. This was OK when they were only imported as part of the swift runtime but, now they are used in C++ mode both in the swift runtime and when C++ interop is enabled. This broke when C++ interop was enabled because the `Swift` module contains references to symbols in the SwiftShims headers which are built without C++ interop enabled (no "swift" namespace). But, when C++ interop is enabled, the SwiftShims headers would put everything in the swift namespace meaning the symbols couldn't be found in the global namespace. Then, the compiler would error when trying to deserialize the Swift module.
122 lines
4.6 KiB
Plaintext
122 lines
4.6 KiB
Plaintext
//===--- FoundationHelpers.mm - Cocoa framework helper shims --------------===//
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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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// This file contains shims to refer to framework functions required by the
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// standard library. The stdlib cannot directly import these modules without
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// introducing circular dependencies.
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//
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//===----------------------------------------------------------------------===//
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#include "swift/Runtime/Config.h"
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#if SWIFT_OBJC_INTEROP
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#import <CoreFoundation/CoreFoundation.h>
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#include "../SwiftShims/CoreFoundationShims.h"
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#import <objc/runtime.h>
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#include "swift/Runtime/Once.h"
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#include <dlfcn.h>
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typedef enum {
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dyld_objc_string_kind
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} DyldObjCConstantKind;
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using namespace swift;
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static CFHashCode(*_CFStringHashCString)(const uint8_t *bytes, CFIndex len);
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static CFHashCode(*_CFStringHashNSString)(id str);
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static CFTypeID(*_CFGetTypeID)(CFTypeRef obj);
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static CFTypeID _CFStringTypeID = 0;
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static bool(*dyld_is_objc_constant)(DyldObjCConstantKind kind,
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const void *addr);
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static swift_once_t initializeBridgingFuncsOnce;
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static void _initializeBridgingFunctionsImpl(void *ctxt) {
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auto getStringTypeID =
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(CFTypeID(*)(void))
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dlsym(RTLD_DEFAULT, "CFStringGetTypeID");
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assert(getStringTypeID);
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_CFStringTypeID = getStringTypeID();
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_CFGetTypeID = (CFTypeID(*)(CFTypeRef obj))dlsym(RTLD_DEFAULT, "CFGetTypeID");
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_CFStringHashNSString = (CFHashCode(*)(id))dlsym(RTLD_DEFAULT,
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"CFStringHashNSString");
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_CFStringHashCString = (CFHashCode(*)(const uint8_t *, CFIndex))dlsym(
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RTLD_DEFAULT,
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"CFStringHashCString");
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if (dlsym(RTLD_NEXT, "objc_debug_tag60_permutations") /* tagged constant strings available */) {
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dyld_is_objc_constant = (bool(*)(DyldObjCConstantKind, const void *))dlsym(
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RTLD_NEXT,
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"_dyld_is_objc_constant");
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}
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}
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static inline void initializeBridgingFunctions() {
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swift_once(&initializeBridgingFuncsOnce,
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_initializeBridgingFunctionsImpl,
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nullptr);
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}
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__swift_uint8_t
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_swift_stdlib_isNSString(id obj) {
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initializeBridgingFunctions();
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return _CFGetTypeID((CFTypeRef)obj) == _CFStringTypeID ? 1 : 0;
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}
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_swift_shims_CFHashCode
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_swift_stdlib_CFStringHashNSString(id _Nonnull obj) {
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initializeBridgingFunctions();
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return _CFStringHashNSString(obj);
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}
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_swift_shims_CFHashCode
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_swift_stdlib_CFStringHashCString(const _swift_shims_UInt8 * _Nonnull bytes,
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_swift_shims_CFIndex length) {
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initializeBridgingFunctions();
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return _CFStringHashCString(bytes, length);
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}
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const __swift_uint8_t *
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_swift_stdlib_NSStringCStringUsingEncodingTrampoline(id _Nonnull obj,
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unsigned long encoding) {
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typedef __swift_uint8_t * _Nullable (*cStrImplPtr)(id, SEL, unsigned long);
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cStrImplPtr imp = (cStrImplPtr)class_getMethodImplementation([obj superclass],
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@selector(cStringUsingEncoding:));
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return imp(obj, @selector(cStringUsingEncoding:), encoding);
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}
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__swift_uint8_t
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_swift_stdlib_NSStringGetCStringTrampoline(id _Nonnull obj,
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_swift_shims_UInt8 *buffer,
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_swift_shims_CFIndex maxLength,
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unsigned long encoding) {
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typedef __swift_uint8_t (*getCStringImplPtr)(id,
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SEL,
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_swift_shims_UInt8 *,
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_swift_shims_CFIndex,
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unsigned long);
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SEL sel = @selector(getCString:maxLength:encoding:);
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getCStringImplPtr imp = (getCStringImplPtr)class_getMethodImplementation([obj superclass], sel);
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return imp(obj, sel, buffer, maxLength, encoding);
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}
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__swift_uint8_t
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_swift_stdlib_dyld_is_objc_constant_string(const void *addr) {
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initializeBridgingFunctions();
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if (!dyld_is_objc_constant) return false;
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return dyld_is_objc_constant(dyld_objc_string_kind, addr) ? 1 : 0;
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}
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#endif
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