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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.
137 lines
4.7 KiB
C++
137 lines
4.7 KiB
C++
//===--- GlobalObjects.cpp - Statically-initialized objects ---------------===//
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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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// Objects that are allocated at global scope instead of on the heap,
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// and statically initialized to avoid synchronization costs, are
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// defined here.
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//
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//===----------------------------------------------------------------------===//
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#include "../SwiftShims/GlobalObjects.h"
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#include "../SwiftShims/Random.h"
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#include "swift/Runtime/Metadata.h"
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#include "swift/Runtime/Debug.h"
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#include "swift/Runtime/EnvironmentVariables.h"
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#include <stdlib.h>
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namespace swift {
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// FIXME(ABI)#76 : does this declaration need SWIFT_RUNTIME_STDLIB_API?
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// _direct type metadata for Swift.__EmptyArrayStorage
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SWIFT_RUNTIME_STDLIB_API
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ClassMetadata CLASS_METADATA_SYM(s19__EmptyArrayStorage);
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// _direct type metadata for Swift.__EmptyDictionarySingleton
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SWIFT_RUNTIME_STDLIB_API
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ClassMetadata CLASS_METADATA_SYM(s26__EmptyDictionarySingleton);
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// _direct type metadata for Swift.__EmptySetSingleton
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SWIFT_RUNTIME_STDLIB_API
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ClassMetadata CLASS_METADATA_SYM(s19__EmptySetSingleton);
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} // namespace swift
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SWIFT_RUNTIME_STDLIB_API
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swift::_SwiftEmptyArrayStorage swift::_swiftEmptyArrayStorage = {
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// HeapObject header;
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{
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&swift::CLASS_METADATA_SYM(s19__EmptyArrayStorage), // isa pointer
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InlineRefCounts::Immortal
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},
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// _SwiftArrayBodyStorage body;
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{
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0, // int count;
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1 // unsigned int _capacityAndFlags; 1 means elementTypeIsBridgedVerbatim
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}
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};
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SWIFT_RUNTIME_STDLIB_API
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swift::_SwiftEmptyDictionarySingleton swift::_swiftEmptyDictionarySingleton = {
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// HeapObject header;
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{
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&swift::CLASS_METADATA_SYM(s26__EmptyDictionarySingleton), // isa pointer
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InlineRefCounts::Immortal
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},
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// _SwiftDictionaryBodyStorage body;
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{
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// Setting the scale to 0 makes for a bucketCount of 1 -- so that the
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// storage consists of a single unoccupied bucket. The capacity is set to
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// 0 so that any insertion will lead to real storage being allocated.
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0, // int count;
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0, // int capacity;
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0, // int8 scale;
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0, // int8 reservedScale;
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0, // int16 extra;
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0, // int32 age;
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0, // int seed;
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(void *)1, // void* keys; (non-null garbage)
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(void *)1 // void* values; (non-null garbage)
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},
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// bucket 0 is unoccupied; other buckets are out-of-bounds
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static_cast<__swift_uintptr_t>(~1) // int metadata;
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};
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SWIFT_RUNTIME_STDLIB_API
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swift::_SwiftEmptySetSingleton swift::_swiftEmptySetSingleton = {
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// HeapObject header;
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{
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&swift::CLASS_METADATA_SYM(s19__EmptySetSingleton), // isa pointer
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InlineRefCounts::Immortal
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},
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// _SwiftSetBodyStorage body;
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{
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// Setting the scale to 0 makes for a bucketCount of 1 -- so that the
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// storage consists of a single unoccupied bucket. The capacity is set to
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// 0 so that any insertion will lead to real storage being allocated.
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0, // int count;
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0, // int capacity;
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0, // int8 scale;
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0, // int8 reservedScale;
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0, // int16 extra;
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0, // int32 age;
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0, // int seed;
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(void *)1, // void *rawElements; (non-null garbage)
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},
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// bucket 0 is unoccupied; other buckets are out-of-bounds
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static_cast<__swift_uintptr_t>(~1) // int metadata;
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};
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static swift::_SwiftHashingParameters initializeHashingParameters() {
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// Setting the environment variable SWIFT_DETERMINISTIC_HASHING to "1"
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// disables randomized hash seeding. This is useful in cases we need to ensure
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// results are repeatable, e.g., in certain test environments. (Note that
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// even if the seed override is enabled, hash values aren't guaranteed to
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// remain stable across even minor stdlib releases.)
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if (swift::runtime::environment::SWIFT_DETERMINISTIC_HASHING()) {
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return { 0, 0, true };
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}
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__swift_uint64_t seed0 = 0, seed1 = 0;
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swift_stdlib_random(&seed0, sizeof(seed0));
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swift_stdlib_random(&seed1, sizeof(seed1));
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return { seed0, seed1, false };
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}
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SWIFT_ALLOWED_RUNTIME_GLOBAL_CTOR_BEGIN
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swift::_SwiftHashingParameters swift::_swift_stdlib_Hashing_parameters =
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initializeHashingParameters();
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SWIFT_ALLOWED_RUNTIME_GLOBAL_CTOR_END
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SWIFT_RUNTIME_STDLIB_API
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void swift::_swift_instantiateInertHeapObject(void *address,
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const HeapMetadata *metadata) {
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::new (address) HeapObject{metadata};
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}
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