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Merge pull request #69546 from xymus/deserialization-opaque-var
Serialization: Fix deserializing opaque types details for computed properties and subscripts
2 parents d5edf34 + f2d1627 commit c10dae9

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7 files changed

+237
-8
lines changed

7 files changed

+237
-8
lines changed

‎include/swift/AST/Decl.h‎

Lines changed: 3 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -3324,6 +3324,9 @@ class OpaqueTypeDecl final :
33243324
};
33253325
}
33263326

3327+
/// Should the underlying type be visible to clients outside of the module?
3328+
bool exportUnderlyingType() const;
3329+
33273330
/// The substitutions that map the generic parameters of the opaque type to
33283331
/// the unique underlying types, when that information is known.
33293332
llvm::Optional<SubstitutionMap> getUniqueUnderlyingTypeSubstitutions() const {

‎lib/AST/Decl.cpp‎

Lines changed: 19 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -9547,6 +9547,25 @@ GenericTypeParamDecl *OpaqueTypeDecl::getExplicitGenericParam(
95479547
return genericParamType->getDecl();
95489548
}
95499549

9550+
bool OpaqueTypeDecl::exportUnderlyingType() const {
9551+
auto mod = getDeclContext()->getParentModule();
9552+
if (mod->getResilienceStrategy() != ResilienceStrategy::Resilient)
9553+
return true;
9554+
9555+
ValueDecl *namingDecl = getNamingDecl();
9556+
if (auto *AFD = dyn_cast<AbstractFunctionDecl>(namingDecl))
9557+
return AFD->getResilienceExpansion() == ResilienceExpansion::Minimal;
9558+
9559+
if (auto *ASD = dyn_cast<AbstractStorageDecl>(namingDecl)) {
9560+
for (auto *accessor : ASD->getAllAccessors())
9561+
if (accessor->getResilienceExpansion() == ResilienceExpansion::Minimal)
9562+
return true;
9563+
return false;
9564+
}
9565+
9566+
llvm_unreachable("The naming decl is expected to be either an AFD or ASD");
9567+
}
9568+
95509569
llvm::Optional<unsigned>
95519570
OpaqueTypeDecl::getAnonymousOpaqueParamOrdinal(TypeRepr *repr) const {
95529571
assert(NamingDeclAndHasOpaqueReturnTypeRepr.getInt() &&

‎lib/Serialization/Deserialization.cpp‎

Lines changed: 16 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -4221,11 +4221,13 @@ class DeclDeserializer {
42214221
GenericSignatureID genericSigID;
42224222
SubstitutionMapID underlyingTypeSubsID;
42234223
uint8_t rawAccessLevel;
4224+
bool exportUnderlyingType;
42244225
decls_block::OpaqueTypeLayout::readRecord(scratch, contextID,
42254226
namingDeclID, interfaceSigID,
42264227
interfaceTypeID, genericSigID,
42274228
underlyingTypeSubsID,
4228-
rawAccessLevel);
4229+
rawAccessLevel,
4230+
exportUnderlyingType);
42294231

42304232
auto declContext = MF.getDeclContext(contextID);
42314233
auto interfaceSigOrErr = MF.getGenericSignatureChecked(interfaceSigID);
@@ -4261,16 +4263,25 @@ class DeclDeserializer {
42614263
else
42624264
opaqueDecl->setGenericSignature(GenericSignature());
42634265

4264-
auto *AFD = dyn_cast<AbstractFunctionDecl>(namingDecl);
4265-
if (MF.getResilienceStrategy() == ResilienceStrategy::Resilient &&
4266-
!MF.FileContext->getParentModule()->isMainModule() &&
4267-
AFD && AFD->getResilienceExpansion() != ResilienceExpansion::Minimal) {
4266+
if (!MF.FileContext->getParentModule()->isMainModule() &&
4267+
!exportUnderlyingType) {
42684268
// Do not try to read the underlying type information if the function
42694269
// is not inlinable in clients. This reflects the swiftinterface behavior
42704270
// in where clients are only aware of the underlying type when the body
42714271
// of the function is public.
4272+
LLVM_DEBUG(
4273+
llvm::dbgs() << "Ignoring underlying information for opaque type of '";
4274+
llvm::dbgs() << namingDecl->getName();
4275+
llvm::dbgs() << "'\n";
4276+
);
42724277

42734278
} else if (underlyingTypeSubsID) {
4279+
LLVM_DEBUG(
4280+
llvm::dbgs() << "Loading underlying information for opaque type of '";
4281+
llvm::dbgs() << namingDecl->getName();
4282+
llvm::dbgs() << "'\n";
4283+
);
4284+
42744285
auto subMapOrError = MF.getSubstitutionMapChecked(underlyingTypeSubsID);
42754286
if (!subMapOrError) {
42764287
// If the underlying type references internal details, ignore it.

‎lib/Serialization/ModuleFormat.h‎

Lines changed: 3 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -58,7 +58,7 @@ const uint16_t SWIFTMODULE_VERSION_MAJOR = 0;
5858
/// describe what change you made. The content of this comment isn't important;
5959
/// it just ensures a conflict if two people change the module format.
6060
/// Don't worry about adhering to the 80-column limit for this line.
61-
const uint16_t SWIFTMODULE_VERSION_MINOR = 816; // throw_addr
61+
const uint16_t SWIFTMODULE_VERSION_MINOR = 817; // Opaque type export details
6262

6363
/// A standard hash seed used for all string hashes in a serialized module.
6464
///
@@ -1641,7 +1641,8 @@ namespace decls_block {
16411641
TypeIDField, // interface type for opaque type
16421642
GenericSignatureIDField, // generic environment
16431643
SubstitutionMapIDField, // optional substitution map for underlying type
1644-
AccessLevelField // access level
1644+
AccessLevelField, // access level
1645+
BCFixed<1> // export underlying type details
16451646
// trailed by generic parameters
16461647
// trailed by conditional substitutions
16471648
>;

‎lib/Serialization/Serialization.cpp‎

Lines changed: 4 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -4490,11 +4490,14 @@ class Serializer::DeclSerializer : public DeclVisitor<DeclSerializer> {
44904490
}
44914491
uint8_t rawAccessLevel =
44924492
getRawStableAccessLevel(opaqueDecl->getFormalAccess());
4493+
bool exportDetails = opaqueDecl->exportUnderlyingType();
4494+
44934495
unsigned abbrCode = S.DeclTypeAbbrCodes[OpaqueTypeLayout::Code];
44944496
OpaqueTypeLayout::emitRecord(S.Out, S.ScratchRecord, abbrCode,
44954497
contextID.getOpaqueValue(), namingDeclID,
44964498
interfaceSigID, interfaceTypeID, genericSigID,
4497-
underlyingSubsID, rawAccessLevel);
4499+
underlyingSubsID, rawAccessLevel,
4500+
exportDetails);
44984501
writeGenericParams(opaqueDecl->getGenericParams());
44994502

45004503
// Serialize all of the conditionally available substitutions expect the

‎test/Serialization/ignore-opaque-underlying-type-back-deploy.swift‎

Lines changed: 70 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,70 @@
1+
/// Variant of ignore-opaque-underlying-type because of the macOS host need.
2+
// RUN: %empty-directory(%t)
3+
// RUN: split-file %s %t
4+
5+
// REQUIRES: asserts
6+
// REQUIRES: OS=macosx
7+
8+
/// Resilient scenario, we ignore underlying type of non-inlinable functions.
9+
/// Build libraries.
10+
// RUN: %target-swift-frontend -emit-module %t/Lib.swift \
11+
// RUN: -swift-version 5 -enable-library-evolution \
12+
// RUN: -emit-module-path %t/Lib.swiftmodule \
13+
// RUN: -emit-module-interface-path %t/Lib.swiftinterface -verify
14+
15+
/// Build clients, with and without safety.
16+
// RUN: %target-swift-frontend -typecheck %t/Client.swift -I %t \
17+
// RUN: -verify -Xllvm -debug-only=Serialization \
18+
// RUN: -enable-deserialization-safety 2>&1 \
19+
// RUN: | %FileCheck %s
20+
21+
// RUN: %target-swift-frontend -typecheck %t/Client.swift -I %t \
22+
// RUN: -verify -Xllvm -debug-only=Serialization \
23+
// RUN: -disable-deserialization-safety 2>&1 \
24+
// RUN: | %FileCheck %s
25+
26+
// RUN: %target-swift-frontend -typecheck %t/Client.swift -I %t \
27+
// RUN: -verify -Xllvm -debug-only=Serialization \
28+
// RUN: -disable-access-control 2>&1 \
29+
// RUN: | %FileCheck %s
30+
31+
/// Build against the swiftinterface.
32+
// RUN: rm %t/Lib.swiftmodule
33+
// RUN: %target-swift-frontend -typecheck %t/Client.swift -I %t \
34+
// RUN: -verify -Xllvm -debug-only=Serialization \
35+
// RUN: -disable-deserialization-safety 2>&1 \
36+
// RUN: | %FileCheck %s
37+
38+
/// Non-resilient scenario, all underlying types are loaded.
39+
// RUN: %empty-directory(%t)
40+
// RUN: split-file %s %t
41+
// RUN: %target-swift-frontend -emit-module %t/Lib.swift \
42+
// RUN: -swift-version 5 \
43+
// RUN: -emit-module-path %t/Lib.swiftmodule -verify
44+
// RUN: %target-swift-frontend -typecheck %t/Client.swift -I %t \
45+
// RUN: -verify -Xllvm -debug-only=Serialization \
46+
// RUN: -disable-deserialization-safety 2>&1 \
47+
// RUN: | %FileCheck --check-prefix=NON-RESILIENT %s
48+
// NON-RESILIENT-NOT: Ignoring underlying information
49+
50+
//--- Lib.swift
51+
public protocol V {}
52+
53+
public struct EV : V {
54+
public init () {}
55+
}
56+
57+
@available(SwiftStdlib 5.1, *)
58+
public extension V {
59+
// CHECK: Loading underlying information for opaque type of 'backdeployedOpaqueFunc()'
60+
@backDeployed(before: SwiftStdlib 5.1) // expected-warning 4 {{'@backDeployed' is unsupported on a instance method with a 'some' return type}}
61+
func backdeployedOpaqueFunc() -> some V { EV() }
62+
}
63+
64+
//--- Client.swift
65+
import Lib
66+
67+
if #available(SwiftStdlib 5.1, *) {
68+
let v = EV()
69+
let _ = v.backdeployedOpaqueFunc()
70+
}

‎test/Serialization/ignore-opaque-underlying-type.swift‎

Lines changed: 122 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,122 @@
1+
// RUN: %empty-directory(%t)
2+
// RUN: split-file %s %t
3+
4+
// REQUIRES: asserts
5+
6+
/// Resilient scenario, we ignore underlying type of non-inlinable functions.
7+
/// Build libraries.
8+
// RUN: %target-swift-frontend -emit-module %t/Lib.swift \
9+
// RUN: -swift-version 5 -enable-library-evolution \
10+
// RUN: -emit-module-path %t/Lib.swiftmodule \
11+
// RUN: -emit-module-interface-path %t/Lib.swiftinterface -verify
12+
13+
/// Build clients, with and without safety.
14+
// RUN: %target-swift-frontend -typecheck %t/Client.swift -I %t \
15+
// RUN: -verify -Xllvm -debug-only=Serialization \
16+
// RUN: -enable-deserialization-safety 2>&1 \
17+
// RUN: | %FileCheck %s
18+
19+
// RUN: %target-swift-frontend -typecheck %t/Client.swift -I %t \
20+
// RUN: -verify -Xllvm -debug-only=Serialization \
21+
// RUN: -disable-deserialization-safety 2>&1 \
22+
// RUN: | %FileCheck %s
23+
24+
// RUN: %target-swift-frontend -typecheck %t/Client.swift -I %t \
25+
// RUN: -verify -Xllvm -debug-only=Serialization \
26+
// RUN: -disable-access-control 2>&1 \
27+
// RUN: | %FileCheck %s
28+
29+
/// Build against the swiftinterface.
30+
// RUN: rm %t/Lib.swiftmodule
31+
// RUN: %target-swift-frontend -typecheck %t/Client.swift -I %t \
32+
// RUN: -verify -Xllvm -debug-only=Serialization \
33+
// RUN: -disable-deserialization-safety 2>&1 \
34+
// RUN: | %FileCheck %s
35+
36+
/// Non-resilient scenario, all underlying types are loaded.
37+
// RUN: %empty-directory(%t)
38+
// RUN: split-file %s %t
39+
// RUN: %target-swift-frontend -emit-module %t/Lib.swift \
40+
// RUN: -swift-version 5 \
41+
// RUN: -emit-module-path %t/Lib.swiftmodule -verify
42+
// RUN: %target-swift-frontend -typecheck %t/Client.swift -I %t \
43+
// RUN: -verify -Xllvm -debug-only=Serialization \
44+
// RUN: -disable-deserialization-safety 2>&1 \
45+
// RUN: | %FileCheck --check-prefix=NON-RESILIENT %s
46+
// NON-RESILIENT-NOT: Ignoring underlying information
47+
48+
//--- Lib.swift
49+
public protocol V {}
50+
51+
public struct EV : V {
52+
public init () {}
53+
}
54+
55+
@available(SwiftStdlib 5.1, *)
56+
public extension V {
57+
private func referencedPrivateFunc(v: some V) -> some V { return v }
58+
59+
/// Hidden underlying types.
60+
// CHECK: Ignoring underlying information for opaque type of 'opaqueReferencingPrivate()'
61+
func opaqueReferencingPrivate() -> some V {
62+
referencedPrivateFunc(v: EV())
63+
}
64+
65+
// CHECK: Ignoring underlying information for opaque type of 'opaqueReferencingPrivateVar'
66+
var opaqueReferencingPrivateVar: some V {
67+
referencedPrivateFunc(v: EV())
68+
}
69+
70+
// CHECK: Ignoring underlying information for opaque type of 'opaqueReferencingPrivateVarPattern'
71+
var opaqueReferencingPrivateVarPattern: some V {
72+
get {
73+
referencedPrivateFunc(v: EV())
74+
}
75+
}
76+
77+
// CHECK: Ignoring underlying information for opaque type of 'subscript(_:)'
78+
subscript(v: some V) -> some V {
79+
referencedPrivateFunc(v: v)
80+
}
81+
82+
/// Visible underlying types.
83+
// CHECK: Loading underlying information for opaque type of 'inlinableOpaqueFunc()'
84+
@inlinable
85+
func inlinableOpaqueFunc() -> some V { EV() }
86+
87+
// CHECK: Loading underlying information for opaque type of 'aeicOpaqueFunc()'
88+
@_alwaysEmitIntoClient
89+
func aeicOpaqueFunc() -> some V { EV() }
90+
91+
// CHECK: Loading underlying information for opaque type of 'transparentOpaqueFunc()'
92+
@_transparent
93+
func transparentOpaqueFunc() -> some V { EV() }
94+
95+
// CHECK: Loading underlying information for opaque type of 'inlinableOpaqueVar'
96+
@inlinable
97+
var inlinableOpaqueVar: some V { EV() }
98+
99+
// CHECK: Loading underlying information for opaque type of 'inlinableOpaqueVarPattern'
100+
var inlinableOpaqueVarPattern: some V {
101+
@inlinable
102+
get { EV() }
103+
}
104+
}
105+
106+
//--- Client.swift
107+
import Lib
108+
109+
if #available(SwiftStdlib 5.1, *) {
110+
let v = EV()
111+
let _ = v.opaqueReferencingPrivate()
112+
let _ = v.opaqueReferencingPrivateVar
113+
let _ = v.opaqueReferencingPrivateVarPattern
114+
let _ = v[v]
115+
116+
let _ = v.inlinableOpaqueFunc()
117+
let _ = v.aeicOpaqueFunc()
118+
let _ = v.transparentOpaqueFunc()
119+
120+
let _ = v.inlinableOpaqueVar
121+
let _ = v.inlinableOpaqueVarPattern
122+
}

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