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zoecarverzoecarver
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Merge pull request #61535 from zoecarver/frt-with-base-class
[cxx-interop] Fix issue with layout of FRTs that contain base classes or un-importable members.
2 parents bec9e54 + c5aaa60 commit 0d0be26

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5 files changed

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5 files changed

+187
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‎lib/IRGen/GenClass.cpp

Lines changed: 75 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -16,6 +16,9 @@
1616

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#include "GenClass.h"
1818

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#include "clang/AST/ASTContext.h"
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#include "clang/AST/Decl.h"
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#include "clang/AST/RecordLayout.h"
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#include "swift/ABI/Class.h"
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#include "swift/ABI/MetadataValues.h"
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#include "swift/AST/ASTContext.h"
@@ -28,6 +31,7 @@
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#include "swift/AST/SemanticAttrs.h"
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#include "swift/AST/TypeMemberVisitor.h"
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#include "swift/AST/Types.h"
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#include "swift/Basic/Defer.h"
3135
#include "swift/ClangImporter/ClangModule.h"
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#include "swift/IRGen/Linking.h"
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#include "swift/SIL/SILModule.h"
@@ -281,6 +285,55 @@ namespace {
281285
superclass);
282286
}
283287

288+
void maybeAddCxxRecordBases(ClassDecl *cd) {
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auto cxxRecord = dyn_cast_or_null<clang::CXXRecordDecl>(cd->getClangDecl());
290+
if (!cxxRecord)
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return;
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auto &layout = cxxRecord->getASTContext().getASTRecordLayout(cxxRecord);
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for (auto base : cxxRecord->bases()) {
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if (base.isVirtual())
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continue;
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auto baseType = base.getType().getCanonicalType();
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auto baseRecord = cast<clang::RecordType>(baseType)->getDecl();
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auto baseCxxRecord = cast<clang::CXXRecordDecl>(baseRecord);
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if (baseCxxRecord->isEmpty())
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continue;
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auto offset = Size(layout.getBaseClassOffset(baseCxxRecord).getQuantity());
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auto size = Size(cxxRecord->getASTContext().getTypeSizeInChars(baseType).getQuantity());
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if (offset != CurSize) {
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assert(offset > CurSize);
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auto paddingSize = offset - CurSize;
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auto &opaqueTI = IGM.getOpaqueStorageTypeInfo(paddingSize, Alignment(1));
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auto element = ElementLayout::getIncomplete(opaqueTI);
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addField(element, LayoutStrategy::Universal);
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}
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auto &opaqueTI = IGM.getOpaqueStorageTypeInfo(size, Alignment(1));
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auto element = ElementLayout::getIncomplete(opaqueTI);
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addField(element, LayoutStrategy::Universal);
321+
}
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}
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324+
void addPaddingBeforeClangField(const clang::FieldDecl *fd) {
325+
auto offset = Size(fd->getASTContext().toCharUnitsFromBits(
326+
fd->getASTContext().getFieldOffset(fd)).getQuantity());
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328+
if (offset != CurSize) {
329+
assert(offset > CurSize);
330+
auto paddingSize = offset - CurSize;
331+
auto &opaqueTI = IGM.getOpaqueStorageTypeInfo(paddingSize, Alignment(1));
332+
auto element = ElementLayout::getIncomplete(opaqueTI);
333+
addField(element, LayoutStrategy::Universal);
334+
}
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}
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284337
void addDirectFieldsFromClass(ClassDecl *rootClass, SILType rootClassType,
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ClassDecl *theClass, SILType classType,
286339
bool superclass) {
@@ -290,7 +343,9 @@ namespace {
290343
->getRecursiveProperties()
291344
.hasUnboundGeneric());
292345

293-
forEachField(IGM, theClass, [&](Field field) {
346+
maybeAddCxxRecordBases(theClass);
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auto fn = [&](Field field) {
294349
// Ignore missing properties here; we should have flagged these
295350
// with the classHasIncompleteLayout call above.
296351
if (!field.isConcrete()) {
@@ -325,7 +380,25 @@ namespace {
325380
AllStoredProperties.push_back(field);
326381
AllFieldAccesses.push_back(getFieldAccess(isKnownEmpty));
327382
}
328-
});
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};
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auto classDecl = dyn_cast<ClassDecl>(theClass);
386+
if (classDecl && classDecl->isRootDefaultActor()) {
387+
fn(Field::DefaultActorStorage);
388+
}
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for (auto decl :
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theClass->getStoredPropertiesAndMissingMemberPlaceholders()) {
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if (decl->getClangDecl())
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if (auto clangField = cast<clang::FieldDecl>(decl->getClangDecl()))
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addPaddingBeforeClangField(clangField);
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if (auto var = dyn_cast<VarDecl>(decl)) {
397+
fn(var);
398+
} else {
399+
fn(cast<MissingMemberDecl>(decl));
400+
}
401+
}
329402

330403
if (!superclass) {
331404
// If we're calculating the layout of a specialized generic class type,

‎test/Interop/Cxx/foreign-reference/Inputs/member-layout.h

Lines changed: 56 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,56 @@
1+
#ifndef TEST_INTEROP_CXX_FOREIGN_REFERENCE_INPUTS_NULLABLE_H
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#define TEST_INTEROP_CXX_FOREIGN_REFERENCE_INPUTS_NULLABLE_H
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struct IntHolder { int value; };
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struct
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__attribute__((swift_attr("import_reference")))
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__attribute__((swift_attr("retain:immortal")))
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__attribute__((swift_attr("release:immortal")))
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IntBase : IntHolder {
11+
int i;
12+
};
13+
14+
struct NoDtorThreeByte {
15+
char x;
16+
char y;
17+
char z;
18+
~NoDtorThreeByte() = delete;
19+
};
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21+
struct
22+
__attribute__((swift_attr("import_reference")))
23+
__attribute__((swift_attr("retain:immortal")))
24+
__attribute__((swift_attr("release:immortal")))
25+
IntCharRef {
26+
int i;
27+
char b;
28+
};
29+
30+
struct
31+
__attribute__((swift_attr("import_reference")))
32+
__attribute__((swift_attr("retain:immortal")))
33+
__attribute__((swift_attr("release:immortal")))
34+
IntCharValue {
35+
int i;
36+
char b;
37+
};
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39+
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struct
41+
__attribute__((swift_attr("import_reference")))
42+
__attribute__((swift_attr("retain:immortal")))
43+
__attribute__((swift_attr("release:immortal")))
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UnimportableMemberRef {
45+
int z; int zz; NoDtorThreeByte x; NoDtorThreeByte xx; int y;
46+
};
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48+
struct
49+
__attribute__((swift_attr("import_reference")))
50+
__attribute__((swift_attr("retain:immortal")))
51+
__attribute__((swift_attr("release:immortal")))
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UnimportableMemberValue {
53+
int z; int zz; NoDtorThreeByte x; NoDtorThreeByte xx; int y;
54+
};
55+
56+
#endif // TEST_INTEROP_CXX_FOREIGN_REFERENCE_INPUTS_NULLABLE_H

‎test/Interop/Cxx/foreign-reference/Inputs/module.modulemap

Lines changed: 5 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -27,3 +27,8 @@ module ReferenceCounted {
2727
header "reference-counted.h"
2828
requires cplusplus
2929
}
30+
31+
module MemberLayout {
32+
header "member-layout.h"
33+
requires cplusplus
34+
}

‎test/Interop/Cxx/foreign-reference/base-class-layout-irgen.swift

Lines changed: 13 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,13 @@
1+
// RUN: %target-swift-emit-ir %s -I %S/Inputs -enable-experimental-cxx-interop -module-name=test | %FileCheck %s
2+
//
3+
// XFAIL: OS=linux-android, OS=linux-androideabi
4+
5+
import MemberLayout
6+
7+
// CHECK: %TSo7IntBaseV = type <{ [4 x i8], %Ts5Int32V }>
8+
9+
// CHECK-LABEL: define {{.*}}swiftcc i32 @"$s4testAA1ys5Int32VSo7IntBaseV_tF"(%TSo7IntBaseV* %0)
10+
// CHECK: getelementptr inbounds %TSo7IntBaseV, %TSo7IntBaseV* %0, i32 0, i32 1
11+
public func test(y: IntBase) -> CInt {
12+
return y.i
13+
}

‎test/Interop/Cxx/foreign-reference/unimportable-member-layout-irgen.swift

Lines changed: 38 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,38 @@
1+
// RUN: %target-swift-emit-ir %s -I %S/Inputs -enable-experimental-cxx-interop -module-name=test | %FileCheck %s
2+
//
3+
// XFAIL: OS=linux-android, OS=linux-androideabi
4+
5+
import MemberLayout
6+
7+
// Make sure the "refs" and "values" look *exactly* the same.
8+
9+
// CHECK: %TSo10IntCharRefV = type <{ %Ts5Int32V, %Ts4Int8V }>
10+
// CHECK: %TSo12IntCharValueV = type <{ %Ts5Int32V, %Ts4Int8V }>
11+
12+
// CHECK: %TSo21UnimportableMemberRefV = type <{ %Ts5Int32V, %Ts5Int32V, [8 x i8], %Ts5Int32V }>
13+
// CHECK: %TSo23UnimportableMemberValueV = type <{ %Ts5Int32V, %Ts5Int32V, [8 x i8], %Ts5Int32V }>
14+
15+
// CHECK-LABEL: define {{.*}}swiftcc i8 @"$s4testAA1ys4Int8VSo10IntCharRefV_tF"(%TSo10IntCharRefV* %0)
16+
// CHECK: getelementptr inbounds %TSo10IntCharRefV, %TSo10IntCharRefV* %0, i32 0, i32 1
17+
public func test(y: IntCharRef) -> CChar {
18+
return y.b
19+
}
20+
21+
// CHECK-LABEL: define {{.*}}swiftcc i8 @"$s4testAA1ys4Int8VSo12IntCharValueV_tF"(%TSo12IntCharValueV* %0)
22+
// CHECK: getelementptr inbounds %TSo12IntCharValueV, %TSo12IntCharValueV* %0, i32 0, i32 1
23+
public func test(y: IntCharValue) -> CChar {
24+
return y.b
25+
}
26+
27+
// CHECK-LABEL: define {{.*}}swiftcc i32 @"$s4testAA1ys5Int32VSo21UnimportableMemberRefV_tF"(%TSo21UnimportableMemberRefV* %0)
28+
// CHECK: getelementptr inbounds %TSo21UnimportableMemberRefV, %TSo21UnimportableMemberRefV* %0, i32 0, i32 3
29+
public func test(y: UnimportableMemberRef) -> CInt {
30+
return y.y
31+
}
32+
33+
// CHECK-LABEL: define {{.*}}swiftcc i32 @"$s4testAA1ys5Int32VSo23UnimportableMemberValueV_tF"(%TSo23UnimportableMemberValueV* %0)
34+
// CHECK: getelementptr inbounds %TSo23UnimportableMemberValueV, %TSo23UnimportableMemberValueV* %0, i32 0, i32 3
35+
public func test(y: UnimportableMemberValue) -> CInt {
36+
return y.y
37+
}
38+

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