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8484c61f19
This fixes an issue where the debug locations for Swift traps were dropped in the produced PDB files, as they were pointing to line 0 I validated this on a sample project using WinDbgx, which can now correctly trap on the same line in multiple places
654 lines
22 KiB
C++
654 lines
22 KiB
C++
//===--- IRGenOptions.h - Swift Language IR Generation Options --*- C++ -*-===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the options which control the generation of IR for
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// swift files.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_AST_IRGENOPTIONS_H
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#define SWIFT_AST_IRGENOPTIONS_H
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#include "swift/AST/LinkLibrary.h"
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#include "swift/Basic/PathRemapper.h"
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#include "swift/Basic/Sanitizers.h"
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#include "swift/Basic/OptionSet.h"
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#include "swift/Basic/OptimizationMode.h"
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#include "swift/Config.h"
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#include "clang/Basic/PointerAuthOptions.h"
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#include "llvm/IR/CallingConv.h"
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// FIXME: This include is just for llvm::SanitizerCoverageOptions. We should
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// split the header upstream so we don't include so much.
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#include "llvm/Transforms/Instrumentation.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/Support/VersionTuple.h"
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#include <optional>
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#include <string>
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#include <vector>
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namespace swift {
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enum class IRGenOutputKind : unsigned {
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/// Just generate an LLVM module and return it.
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Module,
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/// Generate an LLVM module and write it out as LLVM assembly.
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LLVMAssemblyBeforeOptimization,
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/// Generate an LLVM module and write it out as LLVM assembly.
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LLVMAssemblyAfterOptimization,
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/// Generate an LLVM module and write it out as LLVM bitcode.
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LLVMBitcode,
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/// Generate an LLVM module and compile it to assembly.
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NativeAssembly,
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/// Generate an LLVM module, compile it, and assemble into an object file.
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ObjectFile
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};
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enum class IRGenDebugInfoLevel : unsigned {
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None, ///< No debug info.
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LineTables, ///< Line tables only.
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ASTTypes, ///< Line tables + AST type references.
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DwarfTypes, ///< Line tables + AST type references + DWARF types.
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Normal = ASTTypes ///< The setting LLDB prefers.
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};
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enum class IRGenDebugInfoFormat : unsigned {
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None,
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DWARF,
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CodeView
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};
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enum class IRGenLLVMLTOKind : unsigned {
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None,
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Thin,
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Full,
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};
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enum class IRGenEmbedMode : unsigned {
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None,
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EmbedMarker,
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EmbedBitcode
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};
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enum class SwiftAsyncFramePointerKind : unsigned {
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Auto, // Choose Swift async extended frame info based on deployment target.
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Always, // Unconditionally emit Swift async extended frame info.
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Never, // Don't emit Swift async extended frame info.
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};
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enum class ReflectionMetadataMode : unsigned {
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None, ///< Don't emit reflection metadata at all.
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DebuggerOnly, ///< Emit reflection metadata for the debugger, don't link them
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/// into runtime metadata and don't force them to stay alive.
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Runtime, ///< Make reflection metadata fully available.
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};
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using clang::PointerAuthSchema;
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struct PointerAuthOptions : clang::PointerAuthOptions {
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/// Native opaque function types, both thin and thick.
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/// Never address-sensitive.
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PointerAuthSchema SwiftFunctionPointers;
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/// Swift key path helpers.
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PointerAuthSchema KeyPaths;
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/// Swift value witness functions.
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PointerAuthSchema ValueWitnesses;
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/// Swift protocol witness functions.
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PointerAuthSchema ProtocolWitnesses;
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/// Swift protocol witness table associated type metadata access functions.
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PointerAuthSchema ProtocolAssociatedTypeAccessFunctions;
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/// Swift protocol witness table associated conformance witness table
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/// access functions.
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PointerAuthSchema ProtocolAssociatedTypeWitnessTableAccessFunctions;
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/// Swift class v-table functions.
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PointerAuthSchema SwiftClassMethods;
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/// Swift dynamic replacement implementations.
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PointerAuthSchema SwiftDynamicReplacements;
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PointerAuthSchema SwiftDynamicReplacementKeys;
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/// Swift class v-table functions not signed with an address. This is the
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/// return type of swift_lookUpClassMethod().
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PointerAuthSchema SwiftClassMethodPointers;
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/// Swift heap metadata destructors.
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PointerAuthSchema HeapDestructors;
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/// Non-constant function pointers captured in a partial-apply context.
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PointerAuthSchema PartialApplyCapture;
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/// Type descriptor data pointers.
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PointerAuthSchema TypeDescriptors;
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/// Type descriptor data pointers when passed as arguments.
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PointerAuthSchema TypeDescriptorsAsArguments;
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/// Protocol conformance descriptors.
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PointerAuthSchema ProtocolConformanceDescriptors;
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/// Protocol conformance descriptors when passed as arguments.
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PointerAuthSchema ProtocolConformanceDescriptorsAsArguments;
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/// Protocol descriptors when passed as arguments.
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PointerAuthSchema ProtocolDescriptorsAsArguments;
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/// Opaque type descriptors when passed as arguments.
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PointerAuthSchema OpaqueTypeDescriptorsAsArguments;
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/// Type context descriptors when passed as arguments.
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PointerAuthSchema ContextDescriptorsAsArguments;
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/// Resumption functions from yield-once coroutines.
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PointerAuthSchema YieldOnceResumeFunctions;
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/// Resumption functions from yield-many coroutines.
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PointerAuthSchema YieldManyResumeFunctions;
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/// Resilient class stub initializer callbacks.
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PointerAuthSchema ResilientClassStubInitCallbacks;
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/// Like SwiftFunctionPointers but for use with AsyncFunctionPointer values.
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PointerAuthSchema AsyncSwiftFunctionPointers;
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/// Like SwiftClassMethods but for use with AsyncFunctionPointer values.
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PointerAuthSchema AsyncSwiftClassMethods;
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/// Like ProtocolWitnesses but for use with AsyncFunctionPointer values.
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PointerAuthSchema AsyncProtocolWitnesses;
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/// Like SwiftClassMethodPointers but for use with AsyncFunctionPointer
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/// values.
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PointerAuthSchema AsyncSwiftClassMethodPointers;
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/// Like SwiftDynamicReplacements but for use with AsyncFunctionPointer
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/// values.
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PointerAuthSchema AsyncSwiftDynamicReplacements;
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/// Like PartialApplyCapture but for use with AsyncFunctionPointer values.
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PointerAuthSchema AsyncPartialApplyCapture;
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/// The parent async context stored within a child async context.
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PointerAuthSchema AsyncContextParent;
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/// The function to call to resume running in the parent context.
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PointerAuthSchema AsyncContextResume;
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/// The resume function stored in AsyncTask.
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PointerAuthSchema TaskResumeFunction;
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/// The async context stored in AsyncTask.
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PointerAuthSchema TaskResumeContext;
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/// The swift async context entry in the extended frame info.
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PointerAuthSchema AsyncContextExtendedFrameEntry;
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/// Extended existential type shapes in flight.
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PointerAuthSchema ExtendedExistentialTypeShape;
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// The c type descriminator for TaskContinuationFunction*.
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PointerAuthSchema ClangTypeTaskContinuationFunction;
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/// Non-unique extended existential type shapes in flight.
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PointerAuthSchema NonUniqueExtendedExistentialTypeShape;
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/// C type GetExtraInhabitantTag function descriminator.
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PointerAuthSchema GetExtraInhabitantTagFunction;
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/// C type StoreExtraInhabitantTag function descriminator.
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PointerAuthSchema StoreExtraInhabitantTagFunction;
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/// Relative protocol witness table descriminator.
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PointerAuthSchema RelativeProtocolWitnessTable;
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/// Type layout string descriminator.
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PointerAuthSchema TypeLayoutString;
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};
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enum class JITDebugArtifact : unsigned {
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None, ///< None
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LLVMIR, ///< LLVM IR
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Object, ///< Object File
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};
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/// The set of options supported by IR generation.
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class IRGenOptions {
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public:
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std::string ModuleName;
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/// The compilation directory for the debug info.
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std::string DebugCompilationDir;
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/// The DWARF version of debug info.
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uint8_t DWARFVersion = 4;
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/// The command line string that is to be stored in the debug info.
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std::string DebugFlags;
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/// List of -Xcc -D macro definitions.
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std::vector<std::string> ClangDefines;
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/// The libraries and frameworks specified on the command line.
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SmallVector<LinkLibrary, 4> LinkLibraries;
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/// The public dependent libraries specified on the command line.
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std::vector<std::string> PublicLinkLibraries;
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/// If non-empty, the (unmangled) name of a dummy symbol to emit that can be
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/// used to force-load this module.
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std::string ForceLoadSymbolName;
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/// The kind of compilation we should do.
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IRGenOutputKind OutputKind : 3;
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/// Should we spend time verifying that the IR we produce is
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/// well-formed?
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unsigned Verify : 1;
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OptimizationMode OptMode;
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/// Which sanitizer is turned on.
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OptionSet<SanitizerKind> Sanitizers;
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/// Which sanitizer(s) have recovery instrumentation enabled.
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OptionSet<SanitizerKind> SanitizersWithRecoveryInstrumentation;
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/// Whether to enable ODR indicators when building with ASan.
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unsigned SanitizeAddressUseODRIndicator : 1;
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unsigned SanitizerUseStableABI : 1;
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/// Path prefixes that should be rewritten in debug info.
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PathRemapper DebugPrefixMap;
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/// Path prefixes that should be rewritten in coverage info.
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PathRemapper CoveragePrefixMap;
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/// Path prefixes that should be rewritten in info besides debug and coverage
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/// (use DebugPrefixMap and CoveragePrefixMap for those) - currently just
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/// indexing info.
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PathRemapper FilePrefixMap;
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/// What level of debug info to generate.
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IRGenDebugInfoLevel DebugInfoLevel : 2;
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/// What type of debug info to generate.
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IRGenDebugInfoFormat DebugInfoFormat : 2;
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/// Whether to leave DWARF breadcrumbs pointing to imported Clang modules.
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unsigned DisableClangModuleSkeletonCUs : 1;
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/// Whether we're generating IR for the JIT.
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unsigned UseJIT : 1;
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/// Whether we should run LLVM optimizations after IRGen.
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unsigned DisableLLVMOptzns : 1;
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/// Whether we should run swift specific LLVM optimizations after IRGen.
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unsigned DisableSwiftSpecificLLVMOptzns : 1;
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/// Special codegen for playgrounds.
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unsigned Playground : 1;
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/// Emit runtime calls to check the end of the lifetime of stack promoted
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/// objects.
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unsigned EmitStackPromotionChecks : 1;
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unsigned UseSingleModuleLLVMEmission : 1;
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/// Emit functions to separate sections.
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unsigned FunctionSections : 1;
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/// The maximum number of bytes used on a stack frame for stack promotion
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/// (includes alloc_stack allocations).
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unsigned StackPromotionSizeLimit = 1024;
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/// Emit code to verify that static and runtime type layout are consistent for
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/// the given type names.
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SmallVector<StringRef, 1> VerifyTypeLayoutNames;
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/// Frameworks that we should not autolink against.
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SmallVector<std::string, 1> DisableAutolinkFrameworks;
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/// Non-framework libraries that we should not autolink against.
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SmallVector<std::string, 1> DisableAutolinkLibraries;
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/// Whether we should disable inserting autolink directives for any frameworks.
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unsigned DisableFrameworkAutolinking : 1;
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/// Whether we should disable inserting autolink directives altogether.
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unsigned DisableAllAutolinking : 1;
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/// Print the LLVM inline tree at the end of the LLVM pass pipeline.
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unsigned PrintInlineTree : 1;
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/// Always recompile the output even if the module hash might match.
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unsigned AlwaysCompile : 1;
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/// Whether we should embed the bitcode file.
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IRGenEmbedMode EmbedMode : 2;
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IRGenLLVMLTOKind LLVMLTOKind : 2;
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SwiftAsyncFramePointerKind SwiftAsyncFramePointer : 2;
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/// Add names to LLVM values.
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unsigned HasValueNamesSetting : 1;
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unsigned ValueNames : 1;
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/// Emit nominal type field metadata.
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ReflectionMetadataMode ReflectionMetadata : 2;
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/// Emit names of struct stored properties and enum cases.
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unsigned EnableReflectionNames : 1;
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/// Emit mangled names of anonymous context descriptors.
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unsigned EnableAnonymousContextMangledNames : 1;
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/// Force public linkage for private symbols. Used only by the LLDB
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/// expression evaluator.
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unsigned ForcePublicLinkage : 1;
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/// Force lazy initialization of class metadata
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/// Used on Windows to avoid cross-module references.
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unsigned LazyInitializeClassMetadata : 1;
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unsigned LazyInitializeProtocolConformances : 1;
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unsigned IndirectAsyncFunctionPointer : 1;
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/// Use absolute function references instead of relative ones.
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/// Mainly used on WebAssembly, that doesn't support relative references
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/// to code from data.
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unsigned CompactAbsoluteFunctionPointer : 1;
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/// Normally if the -read-legacy-type-info flag is not specified, we look for
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/// a file named "legacy-<arch>.yaml" in SearchPathOpts.RuntimeLibraryPath.
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/// Passing this flag completely disables this behavior.
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unsigned DisableLegacyTypeInfo : 1;
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/// Create metadata specializations for generic types at statically known type
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/// arguments.
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unsigned PrespecializeGenericMetadata : 1;
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/// The path to load legacy type layouts from.
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StringRef ReadLegacyTypeInfoPath;
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/// Should we try to build incrementally by not emitting an object file if it
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/// has the same IR hash as the module that we are preparing to emit?
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///
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/// This is a debugging option meant to make it easier to perform compile time
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/// measurements on a non-clean build directory.
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unsigned UseIncrementalLLVMCodeGen : 1;
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/// Enable the use of type layouts for value witness functions and use
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/// vw functions instead of outlined copy/destroy functions.
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unsigned UseTypeLayoutValueHandling : 1;
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/// Also force structs to be lowered to aligned group TypeLayouts rather than
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/// using TypeInfo entries.
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unsigned ForceStructTypeLayouts : 1;
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/// Run a reg2Mem pass after large loadable type lowering.
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unsigned EnableLargeLoadableTypesReg2Mem : 1;
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/// Enable generation and use of layout string based value witnesses
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unsigned EnableLayoutStringValueWitnesses : 1;
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/// Enable runtime instantiation of value witness strings for generic types
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unsigned EnableLayoutStringValueWitnessesInstantiation : 1;
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unsigned EnableObjectiveCProtocolSymbolicReferences : 1;
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/// Instrument code to generate profiling information.
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unsigned GenerateProfile : 1;
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/// Enable chaining of dynamic replacements.
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unsigned EnableDynamicReplacementChaining : 1;
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/// Disable round-trip verification of mangled debug types.
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unsigned DisableRoundTripDebugTypes : 1;
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/// Whether to disable shadow copies for local variables on the stack. This is
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/// only used for testing.
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unsigned DisableDebuggerShadowCopies : 1;
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/// Whether to disable using mangled names for accessing concrete type metadata.
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unsigned DisableConcreteTypeMetadataMangledNameAccessors : 1;
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/// Whether to disable referencing stdlib symbols via mangled names in
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/// reflection mangling.
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unsigned DisableStandardSubstitutionsInReflectionMangling : 1;
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unsigned EnableGlobalISel : 1;
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unsigned VirtualFunctionElimination : 1;
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unsigned WitnessMethodElimination : 1;
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unsigned ConditionalRuntimeRecords : 1;
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unsigned InternalizeAtLink : 1;
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/// Internalize symbols (static library) - do not export any public symbols.
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unsigned InternalizeSymbols : 1;
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/// Emit a section with references to class_ro_t* in generic class patterns.
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unsigned EmitGenericRODatas : 1;
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/// Whether to avoid emitting zerofill globals as preallocated type metadata
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/// and protocol conformance caches.
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unsigned NoPreallocatedInstantiationCaches : 1;
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unsigned DisableReadonlyStaticObjects : 1;
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/// Collocate metadata functions in their own section.
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unsigned CollocatedMetadataFunctions : 1;
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/// Colocate type descriptors in their own section.
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unsigned ColocateTypeDescriptors : 1;
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/// Use relative (and constant) protocol witness tables.
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unsigned UseRelativeProtocolWitnessTables : 1;
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unsigned UseFragileResilientProtocolWitnesses : 1;
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/// The number of threads for multi-threaded code generation.
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unsigned NumThreads = 0;
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/// Path to the profdata file to be used for PGO, or the empty string.
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std::string UseProfile = "";
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/// List of backend command-line options for -embed-bitcode.
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std::vector<uint8_t> CmdArgs;
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/// Which sanitizer coverage is turned on.
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llvm::SanitizerCoverageOptions SanitizeCoverage;
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/// Pointer authentication.
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PointerAuthOptions PointerAuth;
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/// The different modes for dumping IRGen type info.
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enum class TypeInfoDumpFilter {
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All,
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Resilient,
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Fragile
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};
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TypeInfoDumpFilter TypeInfoFilter;
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/// Pull in runtime compatibility shim libraries by autolinking.
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std::optional<llvm::VersionTuple> AutolinkRuntimeCompatibilityLibraryVersion;
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std::optional<llvm::VersionTuple>
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AutolinkRuntimeCompatibilityDynamicReplacementLibraryVersion;
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std::optional<llvm::VersionTuple>
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AutolinkRuntimeCompatibilityConcurrencyLibraryVersion;
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bool AutolinkRuntimeCompatibilityBytecodeLayoutsLibrary;
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JITDebugArtifact DumpJIT = JITDebugArtifact::None;
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/// If not an empty string, trap intrinsics are lowered to calls to this
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/// function instead of to trap instructions.
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std::string TrapFuncName = "";
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/// The calling convention used to perform non-swift calls.
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llvm::CallingConv::ID PlatformCCallingConvention;
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/// Use CAS based object format as the output.
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bool UseCASBackend;
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/// The output mode for the CAS Backend.
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llvm::CASBackendMode CASObjMode;
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/// Emit a .casid file next to the object file if CAS Backend is used.
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bool EmitCASIDFile;
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IRGenOptions()
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: OutputKind(IRGenOutputKind::LLVMAssemblyAfterOptimization),
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Verify(true), OptMode(OptimizationMode::NotSet),
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Sanitizers(OptionSet<SanitizerKind>()),
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SanitizersWithRecoveryInstrumentation(OptionSet<SanitizerKind>()),
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SanitizeAddressUseODRIndicator(false), SanitizerUseStableABI(false),
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DebugInfoLevel(IRGenDebugInfoLevel::None),
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DebugInfoFormat(IRGenDebugInfoFormat::None),
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DisableClangModuleSkeletonCUs(false), UseJIT(false),
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DisableLLVMOptzns(false), DisableSwiftSpecificLLVMOptzns(false),
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Playground(false), EmitStackPromotionChecks(false),
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UseSingleModuleLLVMEmission(false), FunctionSections(false),
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PrintInlineTree(false), AlwaysCompile(false),
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EmbedMode(IRGenEmbedMode::None), LLVMLTOKind(IRGenLLVMLTOKind::None),
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SwiftAsyncFramePointer(SwiftAsyncFramePointerKind::Auto),
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HasValueNamesSetting(false), ValueNames(false),
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ReflectionMetadata(ReflectionMetadataMode::Runtime),
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EnableReflectionNames(true), EnableAnonymousContextMangledNames(false),
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ForcePublicLinkage(false), LazyInitializeClassMetadata(false),
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LazyInitializeProtocolConformances(false),
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IndirectAsyncFunctionPointer(false),
|
|
CompactAbsoluteFunctionPointer(false), DisableLegacyTypeInfo(false),
|
|
PrespecializeGenericMetadata(false), UseIncrementalLLVMCodeGen(true),
|
|
UseTypeLayoutValueHandling(true), ForceStructTypeLayouts(false),
|
|
EnableLargeLoadableTypesReg2Mem(true),
|
|
EnableLayoutStringValueWitnesses(false),
|
|
EnableLayoutStringValueWitnessesInstantiation(false),
|
|
EnableObjectiveCProtocolSymbolicReferences(true),
|
|
GenerateProfile(false), EnableDynamicReplacementChaining(false),
|
|
DisableDebuggerShadowCopies(false),
|
|
DisableConcreteTypeMetadataMangledNameAccessors(false),
|
|
DisableStandardSubstitutionsInReflectionMangling(false),
|
|
EnableGlobalISel(false), VirtualFunctionElimination(false),
|
|
WitnessMethodElimination(false), ConditionalRuntimeRecords(false),
|
|
InternalizeAtLink(false), InternalizeSymbols(false),
|
|
EmitGenericRODatas(false), NoPreallocatedInstantiationCaches(false),
|
|
DisableReadonlyStaticObjects(false), CollocatedMetadataFunctions(false),
|
|
ColocateTypeDescriptors(true), UseRelativeProtocolWitnessTables(false),
|
|
UseFragileResilientProtocolWitnesses(false),
|
|
CmdArgs(), SanitizeCoverage(llvm::SanitizerCoverageOptions()),
|
|
TypeInfoFilter(TypeInfoDumpFilter::All),
|
|
PlatformCCallingConvention(llvm::CallingConv::C), UseCASBackend(false),
|
|
CASObjMode(llvm::CASBackendMode::Native) {
|
|
#ifndef NDEBUG
|
|
DisableRoundTripDebugTypes = false;
|
|
#else
|
|
DisableRoundTripDebugTypes = true;
|
|
#endif
|
|
}
|
|
|
|
/// Appends to \p os an arbitrary string representing all options which
|
|
/// influence the llvm compilation but are not reflected in the llvm module
|
|
/// itself.
|
|
void writeLLVMCodeGenOptionsTo(llvm::raw_ostream &os) const {
|
|
// We put a letter between each value simply to keep them from running into
|
|
// one another. There might be a vague correspondence between meaning and
|
|
// letter, but don't sweat it.
|
|
os << 'O' << (unsigned)OptMode
|
|
<< 'd' << DisableLLVMOptzns
|
|
<< 'D' << DisableSwiftSpecificLLVMOptzns
|
|
<< 'p' << GenerateProfile
|
|
<< 's' << Sanitizers.toRaw();
|
|
}
|
|
|
|
/// Should LLVM IR value names be emitted and preserved?
|
|
bool shouldProvideValueNames() const {
|
|
// If the command line contains an explicit request about whether to add
|
|
// LLVM value names, honor it. Otherwise, add value names only if the
|
|
// final result is textual LLVM assembly.
|
|
if (HasValueNamesSetting) {
|
|
return ValueNames;
|
|
} else {
|
|
return OutputKind == IRGenOutputKind::LLVMAssemblyBeforeOptimization ||
|
|
OutputKind == IRGenOutputKind::LLVMAssemblyAfterOptimization;
|
|
}
|
|
}
|
|
|
|
bool shouldOptimize() const {
|
|
return OptMode > OptimizationMode::NoOptimization;
|
|
}
|
|
|
|
bool optimizeForSize() const {
|
|
return OptMode == OptimizationMode::ForSize;
|
|
}
|
|
|
|
std::string getDebugFlags(StringRef PrivateDiscriminator,
|
|
bool EnableCXXInterop,
|
|
bool EnableEmbeddedSwift) const {
|
|
std::string Flags = DebugFlags;
|
|
if (!PrivateDiscriminator.empty()) {
|
|
if (!Flags.empty())
|
|
Flags += " ";
|
|
Flags += ("-private-discriminator " + PrivateDiscriminator).str();
|
|
}
|
|
if (EnableCXXInterop) {
|
|
if (!Flags.empty())
|
|
Flags += " ";
|
|
Flags += "-enable-experimental-cxx-interop";
|
|
}
|
|
if (EnableEmbeddedSwift) {
|
|
if (!Flags.empty())
|
|
Flags += " ";
|
|
Flags += "-enable-embedded-swift";
|
|
}
|
|
|
|
return Flags;
|
|
}
|
|
|
|
/// Return a hash code of any components from these options that should
|
|
/// contribute to a Swift Bridging PCH hash.
|
|
llvm::hash_code getPCHHashComponents() const {
|
|
return llvm::hash_value(0);
|
|
}
|
|
|
|
/// Return a hash code of any components from these options that should
|
|
/// contribute to a Swift Dependency Scanning hash.
|
|
llvm::hash_code getModuleScanningHashComponents() const {
|
|
return llvm::hash_value(0);
|
|
}
|
|
|
|
bool hasMultipleIRGenThreads() const { return !UseSingleModuleLLVMEmission && NumThreads > 1; }
|
|
bool shouldPerformIRGenerationInParallel() const { return !UseSingleModuleLLVMEmission && NumThreads != 0; }
|
|
bool hasMultipleIGMs() const { return hasMultipleIRGenThreads(); }
|
|
|
|
bool isDebugInfoCodeView() const {
|
|
return DebugInfoFormat == IRGenDebugInfoFormat::CodeView;
|
|
}
|
|
};
|
|
|
|
} // end namespace swift
|
|
|
|
#endif
|