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swift-api-digester: diagnose changing of the necessity of new witness table entry as ABI breakage
Protocol requirements may not necessarily add new entries to the witness table if it's inherited from super protocol. This patch teaches the json dump to include a flag indicating whether a protocol requirement requires new witness table entry and diagnoses the change of such flag as ABI breakages. rdar://47657204
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16 files changed

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-89
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16 files changed

+186
-89
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‎include/swift/AST/DiagnosticsModuleDiffer.def‎

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@@ -92,6 +92,8 @@ ERROR(param_ownership_change,none,"%0 has %1 changing from %2 to %3", (StringRef
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ERROR(type_witness_change,none,"%0 has type witness type for %1 changing from %2 to %3", (StringRef, StringRef, StringRef, StringRef))
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95+
ERROR(decl_new_witness_table_entry,none,"%0 now requires %select{|no}1 new witness table entry", (StringRef, bool))
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#ifndef DIAG_NO_UNDEF
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# if defined(DIAG)
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# undef DIAG

‎include/swift/IDE/DigesterEnums.def‎

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@@ -133,6 +133,7 @@ KEY_BOOL(IsInternal, isInternal)
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KEY_BOOL(HasStorage, hasStorage)
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KEY_BOOL(HasDidset, hasDidset)
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KEY_BOOL(HasWillset, hasWillset)
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KEY_BOOL(ReqNewWitnessTableEntry, reqNewWitnessTableEntry)
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KEY(kind)
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‎test/api-digester/Inputs/cake1.swift‎

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@@ -158,3 +158,13 @@ public protocol AssociatedTypesProtocol {
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public class TChangesFromIntToString: AssociatedTypesProtocol {
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public typealias T = Int
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}
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public protocol HasMutatingMethod {
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mutating func foo()
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var bar: Int { mutating get }
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}
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public protocol HasMutatingMethodClone: HasMutatingMethod {
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mutating func foo()
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var bar: Int { mutating get }
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}

‎test/api-digester/Inputs/cake2.swift‎

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@@ -169,3 +169,13 @@ public protocol AssociatedTypesProtocol {
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public class TChangesFromIntToString: AssociatedTypesProtocol {
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public typealias T = String
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}
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public protocol HasMutatingMethod {
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mutating func foo()
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var bar: Int { mutating get }
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}
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public protocol HasMutatingMethodClone: HasMutatingMethod {
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func foo()
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var bar: Int { get }
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}

‎test/api-digester/Outputs/Cake-abi.txt‎

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Original file line numberDiff line numberDiff line change
@@ -6,6 +6,8 @@ cake1: Protocol P3 has generic signature change from <τ_0_0 : cake.P1, τ_0_0 :
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/* RawRepresentable Changes */
77

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/* Removed Decls */
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cake1: Accessor GlobalVarChangedToLet.Set() has been removed
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cake1: Accessor RemoveSetters.Value.Set() has been removed
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cake1: AssociatedType RequiementChanges.removedType has been removed
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cake1: Class C3 has been removed
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cake1: Constructor Somestruct2.init(_:) has been removed
@@ -45,6 +47,7 @@ cake1: Func C1.foo1() is now not static
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cake1: Func C5.dy_foo() is now with dynamic
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cake1: Func FinalFuncContainer.NewFinalFunc() is now with final
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cake1: Func FinalFuncContainer.NoLongerFinalFunc() is now without final
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cake1: Func HasMutatingMethodClone.foo() has self access kind changing from Mutating to NonMutating
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cake1: Func S1.foo1() has self access kind changing from NonMutating to Mutating
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cake1: Func S1.foo3() is now static
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cake1: Func _NoResilientClass.NoLongerFinalFunc() is now without final
@@ -73,7 +76,9 @@ cake1: Struct fixedLayoutStruct has removed conformance to P1
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cake2: Protocol P3 has added inherited protocol P4
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/* Protocol Requirement Change */
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cake1: Accessor HasMutatingMethodClone.bar.Get() now requires new witness table entry
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cake1: AssociatedType AssociatedTypePro.T1 has removed default type Int
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cake1: Func HasMutatingMethodClone.foo() now requires new witness table entry
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cake2: AssociatedType RequiementChanges.addedTypeWithoutDefault has been added as a protocol requirement
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cake2: Func RequiementChanges.addedFunc() has been added as a protocol requirement
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cake2: Var RequiementChanges.addedVar has been added as a protocol requirement

‎test/api-digester/Outputs/Cake.txt‎

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Original file line numberDiff line numberDiff line change
@@ -6,6 +6,8 @@ cake1: Protocol P3 has generic signature change from <Self : cake.P1, Self : cak
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/* RawRepresentable Changes */
77

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/* Removed Decls */
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cake1: Accessor GlobalVarChangedToLet.Set() has been removed
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cake1: Accessor RemoveSetters.Value.Set() has been removed
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cake1: AssociatedType RequiementChanges.removedType has been removed
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cake1: Constructor Somestruct2.init(_:) has been removed
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cake1: Func C4.foo() has been removed
@@ -38,6 +40,7 @@ cake1: TypeAlias TChangesFromIntToString.T has underlying type change from Int t
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cake1: Func C1.foo1() is now not static
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cake1: Func FinalFuncContainer.NewFinalFunc() is now with final
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cake1: Func FinalFuncContainer.NoLongerFinalFunc() is now without final
43+
cake1: Func HasMutatingMethodClone.foo() has self access kind changing from Mutating to NonMutating
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cake1: Func S1.foo1() has self access kind changing from NonMutating to Mutating
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cake1: Func S1.foo3() is now static
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cake1: Var C1.CIIns1 changes from weak to strong
@@ -54,6 +57,7 @@ cake1: AssociatedType AssociatedTypePro.T1 has removed default type Int
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cake2: AssociatedType RequiementChanges.addedTypeWithoutDefault has been added as a protocol requirement
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cake2: Func RequiementChanges.addedFunc() has been added as a protocol requirement
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cake2: Var RequiementChanges.addedVar has been added as a protocol requirement
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cake1: Accessor ClassWithOpenMember.property.Get() is no longer open for subclassing
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/* Class Inheritance Change */
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cake1: Class C4 has changed its super class from OldType to NewType

‎test/api-digester/Outputs/cake-abi.json‎

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@@ -226,8 +226,8 @@
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},
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{
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"kind": "Getter",
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"name": "_",
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"printedName": "_()",
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"name": "Get",
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"printedName": "Get()",
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"children": [
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{
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"kind": "TypeNominal",
@@ -254,8 +254,8 @@
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},
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{
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"kind": "Setter",
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"name": "_",
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"printedName": "_()",
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"name": "Set",
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"printedName": "Set()",
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"children": [
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{
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"kind": "TypeNominal",
@@ -310,8 +310,8 @@
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},
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{
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"kind": "Getter",
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"name": "_",
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"printedName": "_()",
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"name": "Get",
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"printedName": "Get()",
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"children": [
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{
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"kind": "TypeNominal",
@@ -330,8 +330,8 @@
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},
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{
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"kind": "Setter",
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"name": "_",
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"printedName": "_()",
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"name": "Set",
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"printedName": "Set()",
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"children": [
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{
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"kind": "TypeNominal",
@@ -522,8 +522,8 @@
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},
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{
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"kind": "Getter",
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"name": "_",
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"printedName": "_()",
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"name": "Get",
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"printedName": "Get()",
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"children": [
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{
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"kind": "TypeNominal",
@@ -638,8 +638,8 @@
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},
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{
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"kind": "Getter",
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"name": "_",
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"printedName": "_()",
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"name": "Get",
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"printedName": "Get()",
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"children": [
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{
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"kind": "TypeNominal",
@@ -658,8 +658,8 @@
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},
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{
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"kind": "Setter",
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"name": "_",
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"printedName": "_()",
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"name": "Set",
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"printedName": "Set()",
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"children": [
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{
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"kind": "TypeNominal",
@@ -705,8 +705,8 @@
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},
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{
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"kind": "Getter",
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"name": "_",
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"printedName": "_()",
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"name": "Get",
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"printedName": "Get()",
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"children": [
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{
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"kind": "TypeNominal",
@@ -751,8 +751,8 @@
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},
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{
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"kind": "Getter",
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"name": "_",
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"printedName": "_()",
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"name": "Get",
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"printedName": "Get()",
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"children": [
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{
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"kind": "TypeNominal",
@@ -795,8 +795,8 @@
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},
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{
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"kind": "Getter",
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"name": "_",
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"printedName": "_()",
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"name": "Get",
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"printedName": "Get()",
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"children": [
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{
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"kind": "TypeNominal",
@@ -895,8 +895,8 @@
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},
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{
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"kind": "Getter",
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"name": "_",
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"printedName": "_()",
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"name": "Get",
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"printedName": "Get()",
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"children": [
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{
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"kind": "TypeNominal",
@@ -1009,6 +1009,7 @@
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"moduleName": "cake",
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"genericSig": "<τ_0_0 where τ_0_0 : PSuper>",
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"protocolReq": true,
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"reqNewWitnessTableEntry": true,
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"funcSelfKind": "NonMutating"
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}
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],
@@ -1116,8 +1117,8 @@
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},
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{
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"kind": "Getter",
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"name": "_",
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"printedName": "_()",
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"name": "Get",
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"printedName": "Get()",
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"children": [
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{
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"kind": "TypeNominal",

‎test/api-digester/Outputs/cake.json‎

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@@ -270,8 +270,8 @@
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},
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{
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"kind": "Getter",
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"name": "_",
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"printedName": "_()",
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"name": "Get",
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"printedName": "Get()",
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"children": [
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{
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"kind": "TypeNominal",
@@ -298,8 +298,8 @@
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},
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{
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"kind": "Setter",
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"name": "_",
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"printedName": "_()",
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"name": "Set",
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"printedName": "Set()",
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"children": [
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{
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"kind": "TypeNominal",
@@ -353,8 +353,8 @@
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},
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{
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"kind": "Getter",
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"name": "_",
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"printedName": "_()",
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"name": "Get",
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"printedName": "Get()",
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"children": [
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{
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"kind": "TypeNominal",
@@ -373,8 +373,8 @@
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},
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{
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"kind": "Setter",
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"name": "_",
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"printedName": "_()",
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"name": "Set",
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"printedName": "Set()",
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"children": [
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{
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"kind": "TypeNominal",
@@ -587,8 +587,8 @@
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},
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{
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"kind": "Getter",
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"name": "_",
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"printedName": "_()",
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"name": "Get",
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"printedName": "Get()",
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"children": [
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{
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"kind": "TypeNominal",
@@ -703,8 +703,8 @@
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},
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{
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"kind": "Getter",
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"name": "_",
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"printedName": "_()",
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"name": "Get",
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"printedName": "Get()",
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"children": [
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{
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"kind": "TypeNominal",
@@ -723,8 +723,8 @@
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},
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{
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"kind": "Setter",
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"name": "_",
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"printedName": "_()",
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"name": "Set",
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"printedName": "Set()",
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"children": [
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{
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"kind": "TypeNominal",
@@ -825,8 +825,8 @@
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},
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{
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"kind": "Getter",
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"name": "_",
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"printedName": "_()",
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"name": "Get",
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"printedName": "Get()",
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"children": [
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{
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"kind": "TypeNominal",
@@ -956,6 +956,7 @@
956956
"moduleName": "cake",
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"genericSig": "<Self where Self : PSuper>",
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"protocolReq": true,
959+
"reqNewWitnessTableEntry": true,
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"funcSelfKind": "NonMutating"
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}
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],

‎test/api-digester/Outputs/clang-module-dump.txt‎

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@@ -34,6 +34,7 @@
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"declAttributes": [
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"ObjC"
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],
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"reqNewWitnessTableEntry": true,
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"funcSelfKind": "NonMutating"
3839
}
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],
@@ -154,6 +155,7 @@
154155
"declAttributes": [
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"ObjC"
156157
],
158+
"reqNewWitnessTableEntry": true,
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"funcSelfKind": "NonMutating"
158160
}
159161
],

‎test/api-digester/compare-dump-abi.swift‎

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// RUN: %empty-directory(%t.mod1)
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// RUN: %empty-directory(%t.mod2)
3+
// RUN: %empty-directory(%t.sdk)
4+
// RUN: %empty-directory(%t.module-cache)
5+
// RUN: %swift -emit-module -o %t.mod1/cake.swiftmodule %S/Inputs/cake1.swift -parse-as-library -enable-library-evolution -I %S/Inputs/APINotesLeft %clang-importer-sdk-nosource
6+
// RUN: %swift -emit-module -o %t.mod2/cake.swiftmodule %S/Inputs/cake2.swift -parse-as-library -enable-library-evolution -I %S/Inputs/APINotesRight %clang-importer-sdk-nosource
7+
// RUN: %api-digester -dump-sdk -module cake -o - -module-cache-path %t.module-cache %clang-importer-sdk-nosource -I %t.mod1 -I %S/Inputs/APINotesLeft -abi | sed 's/"cake"/"cake1"/' > %t.dump1.json
8+
// RUN: %api-digester -dump-sdk -module cake -o - -module-cache-path %t.module-cache %clang-importer-sdk-nosource -I %t.mod2 -I %S/Inputs/APINotesLeft -abi | sed 's/"cake"/"cake2"/' > %t.dump2.json
9+
// RUN: %api-digester -diagnose-sdk -print-module --input-paths %t.dump1.json -input-paths %t.dump2.json -abi -o %t.result
10+
// RUN: %clang -E -P -x c %S/Outputs/Cake-abi.txt -o - | sed '/^\s*$/d' > %t.abi.expected
11+
// RUN: %clang -E -P -x c %t.result -o - | sed '/^\s*$/d' > %t.abi.result.tmp
12+
// RUN: diff -u %t.abi.expected %t.abi.result.tmp

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