mirror of https://github.com/beego/bee.git
323 lines
7.2 KiB
Go
323 lines
7.2 KiB
Go
package api
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import (
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"bytes"
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"fmt"
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"go/constant"
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"go/printer"
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"go/token"
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"reflect"
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"strconv"
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"github.com/go-delve/delve/pkg/dwarf/godwarf"
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"github.com/go-delve/delve/pkg/proc"
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)
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// ConvertBreakpoint converts from a proc.Breakpoint to
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// an api.Breakpoint.
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func ConvertBreakpoint(bp *proc.Breakpoint) *Breakpoint {
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b := &Breakpoint{
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Name: bp.Name,
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ID: bp.ID,
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FunctionName: bp.FunctionName,
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File: bp.File,
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Line: bp.Line,
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Addr: bp.Addr,
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Tracepoint: bp.Tracepoint,
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TraceReturn: bp.TraceReturn,
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Stacktrace: bp.Stacktrace,
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Goroutine: bp.Goroutine,
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Variables: bp.Variables,
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LoadArgs: LoadConfigFromProc(bp.LoadArgs),
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LoadLocals: LoadConfigFromProc(bp.LoadLocals),
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TotalHitCount: bp.TotalHitCount,
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}
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b.HitCount = map[string]uint64{}
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for idx := range bp.HitCount {
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b.HitCount[strconv.Itoa(idx)] = bp.HitCount[idx]
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}
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var buf bytes.Buffer
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printer.Fprint(&buf, token.NewFileSet(), bp.Cond)
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b.Cond = buf.String()
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return b
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}
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// ConvertThread converts a proc.Thread into an
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// api thread.
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func ConvertThread(th proc.Thread) *Thread {
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var (
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function *Function
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file string
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line int
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pc uint64
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gid int
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)
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loc, err := th.Location()
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if err == nil {
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pc = loc.PC
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file = loc.File
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line = loc.Line
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function = ConvertFunction(loc.Fn)
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}
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var bp *Breakpoint
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if b := th.Breakpoint(); b.Active {
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bp = ConvertBreakpoint(b.Breakpoint)
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}
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if g, _ := proc.GetG(th); g != nil {
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gid = g.ID
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}
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return &Thread{
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ID: th.ThreadID(),
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PC: pc,
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File: file,
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Line: line,
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Function: function,
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GoroutineID: gid,
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Breakpoint: bp,
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}
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}
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func prettyTypeName(typ godwarf.Type) string {
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if typ == nil {
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return ""
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}
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if typ.Common().Name != "" {
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return typ.Common().Name
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}
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r := typ.String()
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if r == "*void" {
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return "unsafe.Pointer"
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}
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return r
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}
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func convertFloatValue(v *proc.Variable, sz int) string {
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switch v.FloatSpecial {
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case proc.FloatIsPosInf:
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return "+Inf"
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case proc.FloatIsNegInf:
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return "-Inf"
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case proc.FloatIsNaN:
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return "NaN"
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}
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f, _ := constant.Float64Val(v.Value)
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return strconv.FormatFloat(f, 'f', -1, sz)
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}
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// ConvertVar converts from proc.Variable to api.Variable.
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func ConvertVar(v *proc.Variable) *Variable {
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r := Variable{
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Addr: v.Addr,
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OnlyAddr: v.OnlyAddr,
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Name: v.Name,
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Kind: v.Kind,
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Len: v.Len,
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Cap: v.Cap,
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Flags: VariableFlags(v.Flags),
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Base: v.Base,
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LocationExpr: v.LocationExpr,
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DeclLine: v.DeclLine,
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}
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r.Type = prettyTypeName(v.DwarfType)
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r.RealType = prettyTypeName(v.RealType)
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if v.Unreadable != nil {
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r.Unreadable = v.Unreadable.Error()
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}
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if v.Value != nil {
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switch v.Kind {
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case reflect.Float32:
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r.Value = convertFloatValue(v, 32)
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case reflect.Float64:
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r.Value = convertFloatValue(v, 64)
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case reflect.String, reflect.Func:
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r.Value = constant.StringVal(v.Value)
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default:
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if cd := v.ConstDescr(); cd != "" {
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r.Value = fmt.Sprintf("%s (%s)", cd, v.Value.String())
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} else {
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r.Value = v.Value.String()
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}
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}
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}
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switch v.Kind {
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case reflect.Complex64:
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r.Children = make([]Variable, 2)
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r.Len = 2
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r.Children[0].Name = "real"
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r.Children[0].Kind = reflect.Float32
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r.Children[1].Name = "imaginary"
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r.Children[1].Kind = reflect.Float32
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if v.Value != nil {
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real, _ := constant.Float64Val(constant.Real(v.Value))
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r.Children[0].Value = strconv.FormatFloat(real, 'f', -1, 32)
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imag, _ := constant.Float64Val(constant.Imag(v.Value))
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r.Children[1].Value = strconv.FormatFloat(imag, 'f', -1, 32)
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} else {
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r.Children[0].Value = "nil"
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r.Children[1].Value = "nil"
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}
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case reflect.Complex128:
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r.Children = make([]Variable, 2)
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r.Len = 2
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r.Children[0].Name = "real"
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r.Children[0].Kind = reflect.Float64
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r.Children[1].Name = "imaginary"
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r.Children[1].Kind = reflect.Float64
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if v.Value != nil {
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real, _ := constant.Float64Val(constant.Real(v.Value))
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r.Children[0].Value = strconv.FormatFloat(real, 'f', -1, 64)
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imag, _ := constant.Float64Val(constant.Imag(v.Value))
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r.Children[1].Value = strconv.FormatFloat(imag, 'f', -1, 64)
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} else {
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r.Children[0].Value = "nil"
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r.Children[1].Value = "nil"
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}
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default:
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r.Children = make([]Variable, len(v.Children))
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for i := range v.Children {
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r.Children[i] = *ConvertVar(&v.Children[i])
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}
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}
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return &r
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}
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// ConvertFunction converts from gosym.Func to
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// api.Function.
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func ConvertFunction(fn *proc.Function) *Function {
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if fn == nil {
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return nil
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}
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// fn here used to be a *gosym.Func, the fields Type and GoType below
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// corresponded to the homonymous field of gosym.Func. Since the contents of
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// those fields is not documented their value was replaced with 0 when
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// gosym.Func was replaced by debug_info entries.
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return &Function{
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Name_: fn.Name,
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Type: 0,
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Value: fn.Entry,
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GoType: 0,
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Optimized: fn.Optimized(),
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}
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}
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// ConvertGoroutine converts from proc.G to api.Goroutine.
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func ConvertGoroutine(g *proc.G) *Goroutine {
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th := g.Thread
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tid := 0
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if th != nil {
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tid = th.ThreadID()
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}
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r := &Goroutine{
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ID: g.ID,
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CurrentLoc: ConvertLocation(g.CurrentLoc),
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UserCurrentLoc: ConvertLocation(g.UserCurrent()),
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GoStatementLoc: ConvertLocation(g.Go()),
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StartLoc: ConvertLocation(g.StartLoc()),
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ThreadID: tid,
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}
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if g.Unreadable != nil {
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r.Unreadable = g.Unreadable.Error()
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}
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return r
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}
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// ConvertLocation converts from proc.Location to api.Location.
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func ConvertLocation(loc proc.Location) Location {
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return Location{
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PC: loc.PC,
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File: loc.File,
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Line: loc.Line,
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Function: ConvertFunction(loc.Fn),
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}
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}
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// ConvertAsmInstruction converts from proc.AsmInstruction to api.AsmInstruction.
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func ConvertAsmInstruction(inst proc.AsmInstruction, text string) AsmInstruction {
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var destloc *Location
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if inst.DestLoc != nil {
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r := ConvertLocation(*inst.DestLoc)
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destloc = &r
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}
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return AsmInstruction{
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Loc: ConvertLocation(inst.Loc),
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DestLoc: destloc,
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Text: text,
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Bytes: inst.Bytes,
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Breakpoint: inst.Breakpoint,
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AtPC: inst.AtPC,
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}
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}
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// LoadConfigToProc converts an api.LoadConfig to proc.LoadConfig.
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func LoadConfigToProc(cfg *LoadConfig) *proc.LoadConfig {
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if cfg == nil {
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return nil
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}
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return &proc.LoadConfig{
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cfg.FollowPointers,
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cfg.MaxVariableRecurse,
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cfg.MaxStringLen,
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cfg.MaxArrayValues,
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cfg.MaxStructFields,
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0, // MaxMapBuckets is set internally by pkg/proc, read its documentation for an explanation.
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}
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}
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// LoadConfigFromProc converts a proc.LoadConfig to api.LoadConfig.
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func LoadConfigFromProc(cfg *proc.LoadConfig) *LoadConfig {
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if cfg == nil {
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return nil
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}
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return &LoadConfig{
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cfg.FollowPointers,
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cfg.MaxVariableRecurse,
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cfg.MaxStringLen,
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cfg.MaxArrayValues,
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cfg.MaxStructFields,
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}
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}
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// ConvertRegisters converts proc.Register to api.Register for a slice.
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func ConvertRegisters(in []proc.Register) (out []Register) {
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out = make([]Register, len(in))
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for i := range in {
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out[i] = Register{in[i].Name, in[i].Value}
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}
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return
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}
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// ConvertCheckpoint converts proc.Chekcpoint to api.Checkpoint.
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func ConvertCheckpoint(in proc.Checkpoint) (out Checkpoint) {
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return Checkpoint(in)
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}
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func ConvertImage(image *proc.Image) Image {
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return Image{Path: image.Path}
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}
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