635 lines
17 KiB
Go
635 lines
17 KiB
Go
package ssa
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import (
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"debug/dwarf"
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"fmt"
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"go/token"
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"go/types"
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"path/filepath"
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"github.com/goplus/llvm"
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)
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type aDIBuilder struct {
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di *llvm.DIBuilder
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prog Program
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types map[Type]DIType
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}
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type diBuilder = *aDIBuilder
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func newDIBuilder(prog Program, pkg Package) diBuilder {
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m := pkg.mod
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ctx := m.Context()
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m.AddNamedMetadataOperand("llvm.module.flags",
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ctx.MDNode([]llvm.Metadata{
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llvm.ConstInt(ctx.Int32Type(), 2, false).ConstantAsMetadata(), // Warning on mismatch
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ctx.MDString("Debug Info Version"),
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llvm.ConstInt(ctx.Int32Type(), 3, false).ConstantAsMetadata(),
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}),
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)
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m.AddNamedMetadataOperand("llvm.module.flags",
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ctx.MDNode([]llvm.Metadata{
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llvm.ConstInt(ctx.Int32Type(), 7, false).ConstantAsMetadata(), // Max on mismatch
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ctx.MDString("Dwarf Version"),
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llvm.ConstInt(ctx.Int32Type(), 5, false).ConstantAsMetadata(),
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}),
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)
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return &aDIBuilder{
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di: llvm.NewDIBuilder(m),
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prog: prog,
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types: make(map[*aType]DIType),
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}
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}
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// ----------------------------------------------------------------------------
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type aCompilationUnit struct {
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ll llvm.Metadata
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}
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type CompilationUnit = *aCompilationUnit
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var DWARF_LANG_C llvm.DwarfLang = 0x2
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var DWARF_LANG_GO llvm.DwarfLang = 0x16
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func (b diBuilder) createCompileUnit(filename, dir string) CompilationUnit {
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return &aCompilationUnit{ll: b.di.CreateCompileUnit(llvm.DICompileUnit{
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// TODO(lijie): use C language for now, change after Go plugin of LLDB is ready
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Language: DWARF_LANG_C - 1,
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File: filename,
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Dir: dir,
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Producer: "LLGo",
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Optimized: true,
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RuntimeVersion: 1,
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})}
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}
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// ----------------------------------------------------------------------------
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type aDIScopeMeta struct {
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ll llvm.Metadata
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}
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type DIScopeMeta = *aDIScopeMeta
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type DIScope interface {
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scopeMeta(b diBuilder, pos token.Position) DIScopeMeta
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}
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// ----------------------------------------------------------------------------
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type aDIFile struct {
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ll llvm.Metadata
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}
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type DIFile = *aDIFile
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func (b diBuilder) createFile(filename string) DIFile {
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dir, file := filepath.Split(filename)
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return &aDIFile{ll: b.di.CreateFile(file, dir)}
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}
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func (f DIFile) scopeMeta(b diBuilder, pos token.Position) DIScopeMeta {
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return &aDIScopeMeta{b.file(pos.Filename).ll}
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}
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// ----------------------------------------------------------------------------
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type aDIType struct {
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ll llvm.Metadata
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}
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type DIType = *aDIType
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func (b diBuilder) createType(name string, ty Type, pos token.Position) DIType {
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var typ llvm.Metadata
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switch t := ty.RawType().(type) {
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case *types.Basic:
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if t.Kind() == types.UnsafePointer {
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typ = b.di.CreatePointerType(llvm.DIPointerType{
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Name: name,
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SizeInBits: b.prog.SizeOf(b.prog.rawType(t)) * 8,
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AlignInBits: uint32(b.prog.sizes.Alignof(t) * 8),
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AddressSpace: 0,
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})
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return &aDIType{typ}
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}
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var encoding llvm.DwarfTypeEncoding
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if t.Info()&types.IsBoolean != 0 {
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encoding = llvm.DW_ATE_boolean
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} else if t.Info()&types.IsUnsigned != 0 {
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encoding = llvm.DW_ATE_unsigned
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} else if t.Info()&types.IsInteger != 0 {
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encoding = llvm.DW_ATE_signed
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} else if t.Info()&types.IsFloat != 0 {
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encoding = llvm.DW_ATE_float
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} else if t.Info()&types.IsComplex != 0 {
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return b.createComplexType(ty)
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} else if t.Info()&types.IsString != 0 {
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return b.createStringType()
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} else {
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panic(fmt.Errorf("can't create debug info of basic type: %v, %T", ty.RawType(), ty.RawType()))
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}
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typ = b.di.CreateBasicType(llvm.DIBasicType{
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Name: name,
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SizeInBits: b.prog.SizeOf(b.prog.rawType(t)) * 8,
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Encoding: encoding,
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})
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case *types.Pointer:
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return b.createPointerType(name, b.prog.rawType(t.Elem()), pos)
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case *types.Named:
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ty = b.prog.rawType(t.Underlying())
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return b.diTypeEx(name, ty, pos)
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case *types.Interface:
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ty := b.prog.rtType("Iface")
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return b.createInterfaceType(name, ty)
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case *types.Slice:
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ty := b.prog.rtType("Slice")
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tyElem := b.prog.rawType(t.Elem())
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return b.createSliceType(name, ty, tyElem)
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case *types.Struct:
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return b.createStructType(name, ty, pos)
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case *types.Signature:
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tyFn := b.prog.Closure(ty)
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return b.createFuncPtrType(name, tyFn, pos)
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case *types.Array:
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return b.createArrayType(ty, t.Len())
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case *types.Chan:
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return b.createChanType(name, ty)
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case *types.Map:
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ty := b.prog.rtType("Map")
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tk := b.prog.rawType(t.Key())
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tv := b.prog.rawType(t.Elem())
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return b.createMapType(name, ty, tk, tv)
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default:
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panic(fmt.Errorf("can't create debug info of type: %v, %T", ty.RawType(), ty.RawType()))
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}
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return &aDIType{typ}
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}
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// ----------------------------------------------------------------------------
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type aDIFunction struct {
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ll llvm.Metadata
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}
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type DIFunction = *aDIFunction
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// ----------------------------------------------------------------------------
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type aDIGlobalVariableExpression struct {
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ll llvm.Metadata
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}
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type DIGlobalVariableExpression = *aDIGlobalVariableExpression
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func (b diBuilder) createGlobalVariableExpression(scope DIScope, pos token.Position, name, linkageName string, ty DIType, isLocalToUnit bool) DIGlobalVariableExpression {
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return &aDIGlobalVariableExpression{
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ll: b.di.CreateGlobalVariableExpression(
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scope.scopeMeta(b, pos).ll,
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llvm.DIGlobalVariableExpression{
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Name: name,
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LinkageName: linkageName,
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File: b.file(pos.Filename).ll,
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Line: pos.Line,
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Type: ty.ll,
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LocalToUnit: isLocalToUnit,
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// TODO(lijie): check the following fields
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// Expr: llvm.Metadata{},
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// Decl: llvm.Metadata{},
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// AlignInBits: 0,
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},
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),
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}
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}
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// ----------------------------------------------------------------------------
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type aDIVar struct {
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ll llvm.Metadata
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}
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type DIVar = *aDIVar
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func (b diBuilder) createParameterVariable(scope DIScope, pos token.Position, name string, argNo int, ty DIType) DIVar {
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return &aDIVar{
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ll: b.di.CreateParameterVariable(
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scope.scopeMeta(b, pos).ll,
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llvm.DIParameterVariable{
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Name: name,
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File: b.file(pos.Filename).ll,
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Line: pos.Line,
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ArgNo: argNo,
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Type: ty.ll,
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AlwaysPreserve: true,
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},
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),
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}
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}
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func (b diBuilder) createAutoVariable(scope DIScope, pos token.Position, name string, ty DIType) DIVar {
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return &aDIVar{
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ll: b.di.CreateAutoVariable(
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scope.scopeMeta(b, pos).ll,
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llvm.DIAutoVariable{
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Name: name,
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File: b.file(pos.Filename).ll,
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Line: pos.Line,
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Type: ty.ll,
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AlwaysPreserve: true,
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},
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),
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}
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}
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func (b diBuilder) createStringType() DIType {
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ty := b.prog.rtType("String")
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return &aDIType{
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ll: b.di.CreateStructType(
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llvm.Metadata{},
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llvm.DIStructType{
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Name: "string",
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SizeInBits: b.prog.SizeOf(ty) * 8,
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AlignInBits: uint32(b.prog.sizes.Alignof(ty.RawType()) * 8),
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Elements: []llvm.Metadata{
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b.createMemberType("data", ty, b.prog.CStr(), 0),
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b.createMemberType("len", ty, b.prog.Uint(), 1),
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},
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},
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),
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}
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}
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func (b diBuilder) createArrayType(ty Type, l int64) DIType {
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tyElem := b.prog.rawType(ty.RawType().(*types.Array).Elem())
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return &aDIType{ll: b.di.CreateArrayType(llvm.DIArrayType{
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SizeInBits: b.prog.SizeOf(ty) * 8,
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AlignInBits: uint32(b.prog.sizes.Alignof(ty.RawType()) * 8),
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ElementType: b.diType(tyElem, token.Position{}).ll,
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Subscripts: []llvm.DISubrange{{
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Count: l,
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}},
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})}
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}
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func (b diBuilder) createSliceType(name string, ty, tyElem Type) DIType {
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pos := token.Position{}
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diElemTyPtr := b.prog.Pointer(tyElem)
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return &aDIType{
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ll: b.di.CreateStructType(
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llvm.Metadata{},
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llvm.DIStructType{
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Name: name,
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SizeInBits: b.prog.SizeOf(ty) * 8,
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AlignInBits: uint32(b.prog.sizes.Alignof(ty.RawType()) * 8),
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Elements: []llvm.Metadata{
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b.createMemberTypeEx("data", ty, diElemTyPtr, 0, pos, 0),
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b.createMemberTypeEx("len", ty, b.prog.Uint(), 1, pos, 0),
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b.createMemberTypeEx("cap", ty, b.prog.Uint(), 2, pos, 0),
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},
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},
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),
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}
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}
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func (b diBuilder) createInterfaceType(name string, ty Type) DIType {
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tyRaw := ty.RawType().Underlying()
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tyIntr := b.prog.rawType(tyRaw)
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tyType := b.prog.VoidPtr()
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tyData := b.prog.VoidPtr()
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return &aDIType{ll: b.di.CreateStructType(
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llvm.Metadata{},
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llvm.DIStructType{
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Name: name,
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SizeInBits: b.prog.SizeOf(tyIntr) * 8,
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AlignInBits: uint32(b.prog.sizes.Alignof(ty.RawType()) * 8),
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Elements: []llvm.Metadata{
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b.createMemberType("type", ty, tyType, 0),
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b.createMemberType("data", ty, tyData, 1),
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},
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},
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)}
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}
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func (b diBuilder) createMemberType(name string, tyStruct, tyField Type, idxField int) llvm.Metadata {
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return b.createMemberTypeEx(name, tyStruct, tyField, idxField, token.Position{}, 0)
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}
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func (b diBuilder) createMemberTypeEx(name string, tyStruct, tyField Type, idxField int, pos token.Position, flags int) llvm.Metadata {
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return b.di.CreateMemberType(
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llvm.Metadata{},
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llvm.DIMemberType{
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Name: name,
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SizeInBits: b.prog.SizeOf(tyField) * 8,
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AlignInBits: uint32(b.prog.sizes.Alignof(tyField.RawType()) * 8),
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OffsetInBits: b.prog.OffsetOf(tyStruct, idxField) * 8,
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Type: b.diType(tyField, pos).ll,
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Flags: flags,
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},
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)
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}
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func (b diBuilder) createMapType(name string, tyMap, tk, tv Type) DIType {
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tyCount := b.prog.Int()
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return &aDIType{
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ll: b.di.CreatePointerType(llvm.DIPointerType{
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Name: name,
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Pointee: b.di.CreateStructType(
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llvm.Metadata{},
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llvm.DIStructType{
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Name: tyMap.RawType().String(),
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SizeInBits: b.prog.SizeOf(tyMap) * 8,
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AlignInBits: uint32(b.prog.sizes.Alignof(tyMap.RawType()) * 8),
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Elements: []llvm.Metadata{
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b.createMemberType("count", tyMap, tyCount, 0),
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},
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},
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),
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SizeInBits: b.prog.SizeOf(tyMap) * 8,
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AlignInBits: uint32(b.prog.sizes.Alignof(tyMap.RawType()) * 8),
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}),
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}
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}
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func (b diBuilder) createChanType(name string, t Type) DIType {
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return &aDIType{ll: b.di.CreateStructType(
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llvm.Metadata{},
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llvm.DIStructType{
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Name: name,
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SizeInBits: b.prog.SizeOf(t) * 8,
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AlignInBits: uint32(b.prog.sizes.Alignof(t.RawType()) * 8),
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Elements: []llvm.Metadata{},
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},
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)}
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}
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func (b diBuilder) createComplexType(t Type) DIType {
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var tfield Type
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if t.RawType().(*types.Basic).Kind() == types.Complex128 {
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tfield = b.prog.Float64()
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} else {
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tfield = b.prog.Float32()
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}
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return &aDIType{ll: b.di.CreateStructType(
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llvm.Metadata{},
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llvm.DIStructType{
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Name: t.RawType().String(),
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File: llvm.Metadata{},
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Line: 0,
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SizeInBits: b.prog.SizeOf(t) * 8,
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AlignInBits: uint32(b.prog.sizes.Alignof(t.RawType()) * 8),
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Elements: []llvm.Metadata{
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b.createMemberType("real", t, tfield, 0),
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b.createMemberType("imag", t, tfield, 1),
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},
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})}
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}
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func (b diBuilder) createPointerType(name string, ty Type, pos token.Position) DIType {
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return &aDIType{ll: b.di.CreatePointerType(llvm.DIPointerType{
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Name: name,
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Pointee: b.diType(ty, pos).ll,
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SizeInBits: b.prog.SizeOf(ty) * 8,
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AlignInBits: uint32(b.prog.sizes.Alignof(ty.RawType())) * 8,
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AddressSpace: 0,
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})}
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}
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func (b diBuilder) createStructType(name string, ty Type, pos token.Position) (ret DIType) {
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structType := ty.RawType().(*types.Struct)
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scope := b.file(pos.Filename)
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ret = &aDIType{b.di.CreateReplaceableCompositeType(
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scope.ll,
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llvm.DIReplaceableCompositeType{
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Tag: dwarf.TagStructType,
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Name: name,
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File: b.file(pos.Filename).ll,
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Line: pos.Line,
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SizeInBits: b.prog.SizeOf(ty) * 8,
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AlignInBits: uint32(b.prog.sizes.Alignof(structType) * 8),
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},
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)}
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b.types[ty] = ret
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fields := make([]llvm.Metadata, structType.NumFields())
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for i := 0; i < structType.NumFields(); i++ {
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field := structType.Field(i)
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tyField := b.prog.rawType(field.Type())
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flags := 0
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fields[i] = b.createMemberTypeEx(field.Name(), ty, tyField, i, pos, flags)
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}
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st := b.di.CreateStructType(
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scope.ll,
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llvm.DIStructType{
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Name: name,
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File: b.file(pos.Filename).ll,
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Line: pos.Line,
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SizeInBits: b.prog.SizeOf(ty) * 8,
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AlignInBits: uint32(b.prog.sizes.Alignof(structType) * 8),
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Elements: fields,
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},
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)
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ret.ll.ReplaceAllUsesWith(st)
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ret.ll = st
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return
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}
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func (b diBuilder) createFuncPtrType(name string, ty Type, pos token.Position) DIType {
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ptr := b.prog.VoidPtr()
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return &aDIType{ll: b.di.CreatePointerType(llvm.DIPointerType{
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Name: name,
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Pointee: b.diType(ptr, pos).ll,
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SizeInBits: b.prog.SizeOf(ptr) * 8,
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AlignInBits: uint32(b.prog.sizes.Alignof(ptr.RawType()) * 8),
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})}
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}
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// ----------------------------------------------------------------------------
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func (b diBuilder) dbgDeclare(v Expr, dv DIVar, scope DIScope, pos token.Position, expr DIExpression, blk BasicBlock) {
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loc := llvm.DebugLoc{
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Line: uint(pos.Line),
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Col: uint(pos.Column),
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Scope: scope.scopeMeta(b, pos).ll,
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}
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b.di.InsertDeclareAtEnd(
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v.impl,
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dv.ll,
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expr.ll,
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loc,
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blk.last,
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)
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}
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func (b diBuilder) dbgValue(v Expr, dv DIVar, scope DIScope, pos token.Position, expr DIExpression, blk BasicBlock) {
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loc := llvm.DebugLoc{
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Line: uint(pos.Line),
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Col: uint(pos.Column),
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Scope: scope.scopeMeta(b, pos).ll,
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}
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b.di.InsertValueAtEnd(
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v.impl,
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dv.ll,
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expr.ll,
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loc,
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blk.last,
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)
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}
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func (b diBuilder) diType(t Type, pos token.Position) DIType {
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name := t.RawType().String()
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return b.diTypeEx(name, t, pos)
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}
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func (b diBuilder) diTypeEx(name string, t Type, pos token.Position) DIType {
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if ty, ok := b.types[t]; ok {
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return ty
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}
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ty := b.createType(name, t, pos)
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b.types[t] = ty
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return ty
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}
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func (b diBuilder) varParam(f Function, pos token.Position, varName string, vt DIType, argNo int) DIVar {
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return b.createParameterVariable(
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f,
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pos,
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varName,
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argNo,
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vt,
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)
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}
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|
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func (b diBuilder) varAuto(f Function, pos token.Position, varName string, vt DIType) DIVar {
|
|
return b.createAutoVariable(
|
|
f,
|
|
pos,
|
|
varName,
|
|
vt,
|
|
)
|
|
}
|
|
|
|
func (b diBuilder) file(filename string) DIFile {
|
|
return b.createFile(filename)
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
|
|
type aDIExpression struct {
|
|
ll llvm.Metadata
|
|
}
|
|
|
|
type DIExpression = *aDIExpression
|
|
|
|
func (b diBuilder) createExpression(ops []uint64) DIExpression {
|
|
return &aDIExpression{b.di.CreateExpression(ops)}
|
|
}
|
|
|
|
// -----------------------------------------------------------------------------
|
|
|
|
// Copy struct parameters to alloca'd memory.
|
|
func (b Builder) debug(v Expr) (dbgPtr Expr, dbgVal Expr, deref bool) {
|
|
if v, ok := b.dbgVars[v]; ok {
|
|
return v.ptr, v.val, v.deref
|
|
}
|
|
t := v.Type.RawType().Underlying()
|
|
var ty Type
|
|
switch t := t.(type) {
|
|
case *types.Basic:
|
|
if t.Info()&types.IsComplex != 0 {
|
|
if t.Kind() == types.Complex128 {
|
|
ty = b.Prog.Complex128()
|
|
} else {
|
|
ty = b.Prog.Complex64()
|
|
}
|
|
} else if t.Info()&types.IsString != 0 {
|
|
ty = b.Prog.rtType("String")
|
|
} else {
|
|
ty = v.Type
|
|
}
|
|
case *types.Struct:
|
|
ty = v.Type
|
|
case *types.Slice:
|
|
ty = b.Prog.Type(b.Prog.rtType("Slice").RawType().Underlying(), InGo)
|
|
case *types.Signature:
|
|
ty = b.Prog.Closure(b.Prog.rawType(t))
|
|
case *types.Named:
|
|
ty = b.Prog.Type(t.Underlying(), InGo)
|
|
case *types.Map:
|
|
ty = b.Prog.Type(b.Prog.rtType("Map").RawType().Underlying(), InGo)
|
|
default:
|
|
ty = v.Type
|
|
}
|
|
dbgPtr = b.AllocaT(ty)
|
|
dbgPtr.Type = b.Prog.Pointer(v.Type)
|
|
b.Store(dbgPtr, v)
|
|
dbgVal = b.Load(dbgPtr)
|
|
b.dbgVars[v] = dbgExpr{dbgPtr, dbgVal, deref}
|
|
return dbgPtr, dbgVal, deref
|
|
}
|
|
|
|
func (b Builder) DIDeclare(v Expr, dv DIVar, scope DIScope, pos token.Position, blk BasicBlock) {
|
|
dbgPtr, _, _ := b.debug(v)
|
|
expr := b.Pkg.diBuilder().createExpression(nil)
|
|
b.Pkg.diBuilder().dbgDeclare(dbgPtr, dv, scope, pos, expr, blk)
|
|
}
|
|
|
|
func (b Builder) DIValue(v Expr, dv DIVar, scope DIScope, pos token.Position, blk BasicBlock) {
|
|
expr := b.Pkg.diBuilder().createExpression(nil)
|
|
b.Pkg.diBuilder().dbgValue(v, dv, scope, pos, expr, blk)
|
|
}
|
|
|
|
func (b Builder) DIVarParam(f Function, pos token.Position, varName string, vt Type, argNo int) DIVar {
|
|
t := b.Pkg.diBuilder().diType(vt, pos)
|
|
return b.Pkg.diBuilder().varParam(f, pos, varName, t, argNo)
|
|
}
|
|
|
|
func (b Builder) DIVarAuto(f Function, pos token.Position, varName string, vt Type) DIVar {
|
|
t := b.Pkg.diBuilder().diType(vt, pos)
|
|
return b.Pkg.diBuilder().varAuto(f, pos, varName, t)
|
|
}
|
|
|
|
func (b Builder) DIGlobal(v Expr, name string, pos token.Position) {
|
|
gv := b.Pkg.diBuilder().createGlobalVariableExpression(
|
|
b.Pkg.diBuilder().file(pos.Filename),
|
|
pos,
|
|
name,
|
|
name,
|
|
b.Pkg.diBuilder().diType(v.Type, pos),
|
|
false,
|
|
)
|
|
v.impl.AddMetadata(0, gv.ll)
|
|
}
|
|
|
|
func (b Builder) DISetCurrentDebugLocation(f Function, pos token.Position) {
|
|
b.impl.SetCurrentDebugLocation(
|
|
uint(pos.Line),
|
|
uint(pos.Column),
|
|
f.scopeMeta(b.Pkg.diBuilder(), pos).ll,
|
|
f.impl.InstructionDebugLoc(),
|
|
)
|
|
}
|
|
|
|
func (b Builder) DebugFunction(f Function, pos token.Position) {
|
|
// attach debug info to function
|
|
f.scopeMeta(b.Pkg.di, pos)
|
|
}
|
|
|
|
func (b Builder) Param(idx int) Expr {
|
|
p := b.Func.Param(idx)
|
|
if v, ok := b.dbgVars[p]; ok {
|
|
return v.val
|
|
}
|
|
return p
|
|
}
|
|
|
|
// -----------------------------------------------------------------------------
|