mirror of
https://github.com/apple/swift.git
synced 2025-12-14 20:36:38 +01:00
3fa1d1fe3f
This adds a new copy of LLVMSupport into the runtime. This is the final step before changing the inline namespace for the runtime support. This will allow us to avoid the ODR violations from the header definitions of LLVMSupport. LLVMSupport forked at: 22492eead218ec91d349c8c50439880fbeacf2b7 Changes made to LLVMSupport from that revision: process.inc forward declares `_beginthreadex` due to compilation issues due to custom flag handling API changes required that we alter the `Deallocate` routine to account for the alignment. This is a temporary state, meant to simplify the process. We do not use the entire LLVMSupport library and there is no value in keeping the entire library. Subsequent commits will prune the library to the needs for the runtime.
137 lines
4.7 KiB
C++
137 lines
4.7 KiB
C++
//===--- GlobalObjects.cpp - Statically-initialized objects ---------------===//
|
|
//
|
|
// This source file is part of the Swift.org open source project
|
|
//
|
|
// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
|
|
// Licensed under Apache License v2.0 with Runtime Library Exception
|
|
//
|
|
// See https://swift.org/LICENSE.txt for license information
|
|
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Objects that are allocated at global scope instead of on the heap,
|
|
// and statically initialized to avoid synchronization costs, are
|
|
// defined here.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "../SwiftShims/GlobalObjects.h"
|
|
#include "../SwiftShims/Random.h"
|
|
#include "swift/Runtime/Metadata.h"
|
|
#include "swift/Runtime/Debug.h"
|
|
#include <stdlib.h>
|
|
|
|
namespace swift {
|
|
// FIXME(ABI)#76 : does this declaration need SWIFT_RUNTIME_STDLIB_API?
|
|
// _direct type metadata for Swift.__EmptyArrayStorage
|
|
SWIFT_RUNTIME_STDLIB_API
|
|
ClassMetadata CLASS_METADATA_SYM(s19__EmptyArrayStorage);
|
|
|
|
// _direct type metadata for Swift.__EmptyDictionarySingleton
|
|
SWIFT_RUNTIME_STDLIB_API
|
|
ClassMetadata CLASS_METADATA_SYM(s26__EmptyDictionarySingleton);
|
|
|
|
// _direct type metadata for Swift.__EmptySetSingleton
|
|
SWIFT_RUNTIME_STDLIB_API
|
|
ClassMetadata CLASS_METADATA_SYM(s19__EmptySetSingleton);
|
|
} // namespace swift
|
|
|
|
SWIFT_RUNTIME_STDLIB_API
|
|
swift::_SwiftEmptyArrayStorage swift::_swiftEmptyArrayStorage = {
|
|
// HeapObject header;
|
|
{
|
|
&swift::CLASS_METADATA_SYM(s19__EmptyArrayStorage), // isa pointer
|
|
InlineRefCounts::Immortal
|
|
},
|
|
|
|
// _SwiftArrayBodyStorage body;
|
|
{
|
|
0, // int count;
|
|
1 // unsigned int _capacityAndFlags; 1 means elementTypeIsBridgedVerbatim
|
|
}
|
|
};
|
|
|
|
SWIFT_RUNTIME_STDLIB_API
|
|
swift::_SwiftEmptyDictionarySingleton swift::_swiftEmptyDictionarySingleton = {
|
|
// HeapObject header;
|
|
{
|
|
&swift::CLASS_METADATA_SYM(s26__EmptyDictionarySingleton), // isa pointer
|
|
InlineRefCounts::Immortal
|
|
},
|
|
|
|
// _SwiftDictionaryBodyStorage body;
|
|
{
|
|
// Setting the scale to 0 makes for a bucketCount of 1 -- so that the
|
|
// storage consists of a single unoccupied bucket. The capacity is set to
|
|
// 0 so that any insertion will lead to real storage being allocated.
|
|
0, // int count;
|
|
0, // int capacity;
|
|
0, // int8 scale;
|
|
0, // int8 reservedScale;
|
|
0, // int16 extra;
|
|
0, // int32 age;
|
|
0, // int seed;
|
|
(void *)1, // void* keys; (non-null garbage)
|
|
(void *)1 // void* values; (non-null garbage)
|
|
},
|
|
|
|
// bucket 0 is unoccupied; other buckets are out-of-bounds
|
|
static_cast<__swift_uintptr_t>(~1) // int metadata;
|
|
};
|
|
|
|
SWIFT_RUNTIME_STDLIB_API
|
|
swift::_SwiftEmptySetSingleton swift::_swiftEmptySetSingleton = {
|
|
// HeapObject header;
|
|
{
|
|
&swift::CLASS_METADATA_SYM(s19__EmptySetSingleton), // isa pointer
|
|
InlineRefCounts::Immortal
|
|
},
|
|
|
|
// _SwiftSetBodyStorage body;
|
|
{
|
|
// Setting the scale to 0 makes for a bucketCount of 1 -- so that the
|
|
// storage consists of a single unoccupied bucket. The capacity is set to
|
|
// 0 so that any insertion will lead to real storage being allocated.
|
|
0, // int count;
|
|
0, // int capacity;
|
|
0, // int8 scale;
|
|
0, // int8 reservedScale;
|
|
0, // int16 extra;
|
|
0, // int32 age;
|
|
0, // int seed;
|
|
(void *)1, // void *rawElements; (non-null garbage)
|
|
},
|
|
|
|
// bucket 0 is unoccupied; other buckets are out-of-bounds
|
|
static_cast<__swift_uintptr_t>(~1) // int metadata;
|
|
};
|
|
|
|
static swift::_SwiftHashingParameters initializeHashingParameters() {
|
|
// Setting the environment variable SWIFT_DETERMINISTIC_HASHING to "1"
|
|
// disables randomized hash seeding. This is useful in cases we need to ensure
|
|
// results are repeatable, e.g., in certain test environments. (Note that
|
|
// even if the seed override is enabled, hash values aren't guaranteed to
|
|
// remain stable across even minor stdlib releases.)
|
|
auto determinism = getenv("SWIFT_DETERMINISTIC_HASHING");
|
|
if (determinism && 0 == strcmp(determinism, "1")) {
|
|
return { 0, 0, true };
|
|
}
|
|
__swift_uint64_t seed0 = 0, seed1 = 0;
|
|
swift::swift_stdlib_random(&seed0, sizeof(seed0));
|
|
swift::swift_stdlib_random(&seed1, sizeof(seed1));
|
|
return { seed0, seed1, false };
|
|
}
|
|
|
|
SWIFT_ALLOWED_RUNTIME_GLOBAL_CTOR_BEGIN
|
|
swift::_SwiftHashingParameters swift::_swift_stdlib_Hashing_parameters =
|
|
initializeHashingParameters();
|
|
SWIFT_ALLOWED_RUNTIME_GLOBAL_CTOR_END
|
|
|
|
|
|
SWIFT_RUNTIME_STDLIB_API
|
|
void swift::_swift_instantiateInertHeapObject(void *address,
|
|
const HeapMetadata *metadata) {
|
|
::new (address) HeapObject{metadata};
|
|
}
|