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[interop][SwiftToCxx] print out value witness table definition in swift::_impl
1 parent 9254c47 commit a65ddbe

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4 files changed

+89
-0
lines changed

4 files changed

+89
-0
lines changed

‎lib/PrintAsClang/PrintAsClang.cpp‎

Lines changed: 11 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -51,6 +51,16 @@ static void emitObjCConditional(raw_ostream &out,
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out << "#endif\n";
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}
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54+
static void writePtrauthPrologue(raw_ostream &os) {
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os << "#if __has_include(<ptrauth.h>)\n";
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os << "# include <ptrauth.h>\n";
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os << "#else\n";
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os << "# ifndef __ptrauth_swift_value_witness_function_pointer\n";
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os << "# define __ptrauth_swift_value_witness_function_pointer(x)\n";
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os << "# endif\n";
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os << "#endif\n";
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}
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static void writePrologue(raw_ostream &out, ASTContext &ctx,
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StringRef macroGuard) {
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@@ -98,6 +108,7 @@ static void writePrologue(raw_ostream &out, ASTContext &ctx,
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"#include <stdbool.h>\n"
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"#include <string.h>\n";
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});
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writePtrauthPrologue(out);
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out << "\n"
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"#if !defined(SWIFT_TYPEDEFS)\n"
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"# define SWIFT_TYPEDEFS 1\n"

‎lib/PrintAsClang/PrintSwiftToClangCoreScaffold.cpp‎

Lines changed: 47 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -14,9 +14,11 @@
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#include "ClangSyntaxPrinter.h"
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#include "PrimitiveTypeMapping.h"
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#include "SwiftToClangInteropContext.h"
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#include "swift/ABI/MetadataValues.h"
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#include "swift/AST/Decl.h"
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#include "swift/AST/Type.h"
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#include "swift/IRGen/IRABIDetailsProvider.h"
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#include "llvm/ADT/STLExtras.h"
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using namespace swift;
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@@ -60,6 +62,49 @@ static void printKnownType(
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printKnownStruct(typeMapping, os, name, typeRecord);
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}
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65+
static void printValueWitnessTableFunctionType(raw_ostream &os, StringRef name,
66+
StringRef returnType,
67+
std::string paramTypes,
68+
uint16_t ptrauthDisc) {
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os << "using ValueWitness" << name << "Ty = " << returnType << "(*)("
70+
<< paramTypes << ") __ptrauth_swift_value_witness_function_pointer("
71+
<< ptrauthDisc << ");\n";
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}
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static std::string makeParams(const char *arg) { return arg; }
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template <class... T>
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static std::string makeParams(const char *arg, const T... args) {
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return std::string(arg) + ", " + makeParams(args...);
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}
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static void printValueWitnessTable(raw_ostream &os) {
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std::string members;
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llvm::raw_string_ostream membersOS(members);
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85+
#define WANT_ONLY_REQUIRED_VALUE_WITNESSES
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#define DATA_VALUE_WITNESS(lowerId, upperId, type) \
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membersOS << " " << type << " " << #lowerId << ";\n";
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#define FUNCTION_VALUE_WITNESS(lowerId, upperId, returnType, paramTypes) \
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printValueWitnessTableFunctionType( \
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os, #upperId, returnType, makeParams paramTypes, \
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SpecialPointerAuthDiscriminators::upperId); \
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membersOS << " ValueWitness" << #upperId << "Ty _Nonnull " << #lowerId \
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<< ";\n";
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#define MUTABLE_VALUE_TYPE "void * _Nonnull"
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#define IMMUTABLE_VALUE_TYPE "const void * _Nonnull"
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#define MUTABLE_BUFFER_TYPE "void * _Nonnull"
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#define IMMUTABLE_BUFFER_TYPE "const void * _Nonnull"
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#define TYPE_TYPE "void * _Nonnull"
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#define SIZE_TYPE "size_t"
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#define INT_TYPE "int"
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#define UINT_TYPE "unsigned"
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#define VOID_TYPE "void"
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#include "swift/ABI/ValueWitness.def"
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os << "\nstruct ValueWitnessTable {\n" << membersOS.str() << "};\n";
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}
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static void printTypeMetadataResponseType(SwiftToClangInteropContext &ctx,
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PrimitiveTypeMapping &typeMapping,
65110
raw_ostream &os) {
@@ -82,6 +127,8 @@ void swift::printSwiftToClangCoreScaffold(SwiftToClangInteropContext &ctx,
82127
cxx_synthesis::getCxxImplNamespaceName(), [&](raw_ostream &) {
83128
printer.printExternC([&](raw_ostream &os) {
84129
printTypeMetadataResponseType(ctx, typeMapping, os);
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os << "\n";
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printValueWitnessTable(os);
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});
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});
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});

‎test/Interop/SwiftToCxx/core/swift-impl-defs-in-cxx.swift‎

Lines changed: 24 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -23,6 +23,30 @@
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// CHECK-NEXT: // Swift type metadata request type.
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// CHECK-NEXT: typedef uint{{.*}}_t MetadataRequestTy;
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// CHECK-EMPTY:
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// CHECK-NEXT: using ValueWitnessInitializeBufferWithCopyOfBufferTy = void * _Nonnull(*)(void * _Nonnull, void * _Nonnull, void * _Nonnull) __ptrauth_swift_value_witness_function_pointer(
27+
// CHECK-NEXT: using ValueWitnessDestroyTy = void(*)(void * _Nonnull, void * _Nonnull) __ptrauth_swift_value_witness_function_pointer(
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// CHECK-NEXT: using ValueWitnessInitializeWithCopyTy = void * _Nonnull(*)(void * _Nonnull, void * _Nonnull, void * _Nonnull) __ptrauth_swift_value_witness_function_pointer(
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// CHECK-NEXT: using ValueWitnessAssignWithCopyTy = void * _Nonnull(*)(void * _Nonnull, void * _Nonnull, void * _Nonnull) __ptrauth_swift_value_witness_function_pointer(
30+
// CHECK-NEXT: using ValueWitnessInitializeWithTakeTy = void * _Nonnull(*)(void * _Nonnull, void * _Nonnull, void * _Nonnull) __ptrauth_swift_value_witness_function_pointer(
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// CHECK-NEXT: using ValueWitnessAssignWithTakeTy = void * _Nonnull(*)(void * _Nonnull, void * _Nonnull, void * _Nonnull) __ptrauth_swift_value_witness_function_pointer(
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// CHECK-NEXT: using ValueWitnessGetEnumTagSinglePayloadTy = unsigned(*)(const void * _Nonnull, unsigned, void * _Nonnull) __ptrauth_swift_value_witness_function_pointer(
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// CHECK-NEXT: using ValueWitnessStoreEnumTagSinglePayloadTy = void(*)(void * _Nonnull, unsigned, unsigned, void * _Nonnull) __ptrauth_swift_value_witness_function_pointer(
34+
// CHECK-EMPTY:
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// CHECK-NEXT: struct ValueWitnessTable {
36+
// CHECK-NEXT: ValueWitnessInitializeBufferWithCopyOfBufferTy _Nonnull initializeBufferWithCopyOfBuffer;
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// CHECK-NEXT: ValueWitnessDestroyTy _Nonnull destroy;
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// CHECK-NEXT: ValueWitnessInitializeWithCopyTy _Nonnull initializeWithCopy;
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// CHECK-NEXT: ValueWitnessAssignWithCopyTy _Nonnull assignWithCopy;
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// CHECK-NEXT: ValueWitnessInitializeWithTakeTy _Nonnull initializeWithTake;
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// CHECK-NEXT: ValueWitnessAssignWithTakeTy _Nonnull assignWithTake;
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// CHECK-NEXT: ValueWitnessGetEnumTagSinglePayloadTy _Nonnull getEnumTagSinglePayload;
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// CHECK-NEXT: ValueWitnessStoreEnumTagSinglePayloadTy _Nonnull storeEnumTagSinglePayload;
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// CHECK-NEXT: size_t size;
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// CHECK-NEXT: size_t stride;
46+
// CHECK-NEXT: unsigned flags;
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// CHECK-NEXT: unsigned extraInhabitantCount;
48+
// CHECK-NEXT: };
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// CHECK-EMPTY:
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// CHECK-NEXT: #ifdef __cplusplus
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// CHECK-NEXT: }
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// CHECK-NEXT: #endif

‎test/PrintAsCxx/empty.swift‎

Lines changed: 7 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -35,6 +35,13 @@
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// CHECK-NEXT: #include <stdbool.h>
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// CHECK-NEXT: #include <string.h>
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// CHECK-NEXT: #endif
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// CHECK-NEXT: #if __has_include(<ptrauth.h>)
39+
// CHECK-NEXT: # include <ptrauth.h>
40+
// CHECK-NEXT: #else
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// CHECK-NEXT: # ifndef __ptrauth_swift_value_witness_function_pointer
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// CHECK-NEXT: # define __ptrauth_swift_value_witness_function_pointer(x)
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// CHECK-NEXT: # endif
44+
// CHECK-NEXT: #endif
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3946
// CHECK-LABEL: !defined(SWIFT_TYPEDEFS)
4047
// CHECK-NEXT: # define SWIFT_TYPEDEFS 1

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