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57b1664f92
DebugInfoTypes didn't properly distinguish between types with an unknown size
and used 0 as the default value. This can cause types to show up in DWARF with a
size of 0, which will prevent LLDB from looking at the type further. In
practice, this meant that many resilient types (for example, SwiftUI Views)
couldn't be displayed in the debugger and just showed up as empty.
This patch does three things:
0. Make size in DebugTypeInfo optional.
1. Introduce CompletedDebugTypeInfo, a subclass of DebugTypeInfo where
size is guaranteed to be non-empty.
2. Change some APIs that only make sense with a size to use
CompletedDebugTypeInfo. This caused some churn because I needed to refactor
the get*Elements() functions back into their callers to facilitate the new
early-exit path. These functions are only called when compiling with
-gdwarf-types.
3. Change createOpaqueStructWithSizedContainer() to create a size-less forward
declaration instead of a zero-sized type for the inner type.
rdar://76973844
(cherry picked from commit b8e6eebdbc)
89 lines
3.2 KiB
Swift
89 lines
3.2 KiB
Swift
// RUN: %target-swift-frontend -primary-file %s -emit-ir -g -o - | %FileCheck %s
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// RUN: %target-swift-frontend -primary-file %s -emit-ir -gdwarf-types -o - | %FileCheck %s --check-prefix=DWARF
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// UNSUPPORTED: OS=watchos
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protocol P {}
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enum Either {
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case First(Int64), Second(P), Neither
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// CHECK: !DICompositeType({{.*}}name: "Either",
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// CHECK-SAME: size: {{328|168}},
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}
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// CHECK: ![[EMPTY:.*]] = !{}
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// DWARF: ![[INT:.*]] = !DICompositeType({{.*}}identifier: "$sSiD"
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let E : Either = .Neither;
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// CHECK: !DICompositeType({{.*}}name: "Color",
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// CHECK-SAME: size: 8,
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// CHECK-SAME: identifier: "$s4enum5ColorOD"
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enum Color : UInt64 {
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// This is effectively a 2-bit bitfield:
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// DWARF: !DIDerivedType(tag: DW_TAG_member, name: "Red"
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// DWARF-SAME: baseType: ![[UINT64:[0-9]+]]
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// DWARF-SAME: size: 8{{[,)]}}
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// DWARF: ![[UINT64]] = !DICompositeType({{.*}}identifier: "$ss6UInt64VD"
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case Red, Green, Blue
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}
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// CHECK: !DICompositeType({{.*}}name: "MaybeIntPair",
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// CHECK-SAME: size: 136{{[,)]}}
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// CHECK-SAME: identifier: "$s4enum12MaybeIntPairOD"
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enum MaybeIntPair {
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// DWARF: !DIDerivedType(tag: DW_TAG_member, name: "none"
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// DWARF-SAME: baseType: ![[INT]]{{[,)]}}
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case none
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// DWARF: !DIDerivedType(tag: DW_TAG_member, name: "just"
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// DWARF-SAME: baseType: ![[INTTUP:[0-9]+]]
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// DWARF-SAME: size: 128{{[,)]}}
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// DWARF: ![[INTTUP]] = !DICompositeType({{.*}}identifier: "$ss5Int64V_ABtD"
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case just(Int64, Int64)
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}
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enum Maybe<T> {
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case none
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case just(T)
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}
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let r = Color.Red
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let c = MaybeIntPair.just(74, 75)
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// CHECK: !DICompositeType({{.*}}name: "Maybe",
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// CHECK-SAME: identifier: "$s4enum5MaybeOyAA5ColorOGD"
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let movie : Maybe<Color> = .none
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public enum Nothing { }
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public func foo(_ empty : Nothing) { }
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// CHECK: !DICompositeType({{.*}}name: "Nothing", {{.*}}elements: ![[EMPTY]]
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// CHECK: !DICompositeType({{.*}}name: "Rose",
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// CHECK-SAME: {{.*}}identifier: "$s4enum4RoseOyxG{{z?}}D")
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enum Rose<A> {
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case MkRose(() -> A, () -> [Rose<A>])
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// DWARF: !DICompositeType({{.*}}name: "Rose",{{.*}}flags: DIFlagFwdDecl{{.*}}identifier: "$s4enum4RoseOyxGD")
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case IORose(() -> Rose<A>)
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}
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func foo<T>(_ x : Rose<T>) -> Rose<T> { return x }
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// CHECK: !DICompositeType({{.*}}name: "Tuple", {{.*}}identifier: "$s4enum5TupleOyxGD")
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// DWARF: !DICompositeType({{.*}}name: "Tuple",
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// DWARF-SAME: {{.*}}identifier: "$s4enum5TupleOyxG{{z?}}D")
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public enum Tuple<P> {
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case C(P, () -> Tuple)
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}
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func bar<T>(_ x : Tuple<T>) -> Tuple<T> { return x }
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// CHECK-DAG: ![[LIST:.*]] = !DICompositeType({{.*}}identifier: "$s4enum4ListOyxGD"
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// CHECK-DAG: ![[LIST_MEMBER:.*]] = !DIDerivedType(tag: DW_TAG_member, {{.*}} baseType: ![[LIST]]
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// CHECK-DAG: ![[LIST_ELTS:.*]] = !{![[LIST_MEMBER]]}
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// CHECK-DAG: ![[LIST_CONTAINER:.*]] = !DICompositeType({{.*}}elements: ![[LIST_ELTS]]
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// CHECK-DAG: ![[LET_LIST:.*]] = !DIDerivedType(tag: DW_TAG_const_type, baseType: ![[LIST_CONTAINER]])
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// CHECK-DAG: !DILocalVariable(name: "self", arg: 1, {{.*}} line: [[@LINE+4]], type: ![[LET_LIST]], flags: DIFlagArtificial)
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public enum List<T> {
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indirect case Tail(List, T)
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case End
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func fooMyList() {}
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}
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