terminal: show current thread of goroutines (#564)

proc/proc.go

@@ -620,6 +620,10 @@ func (dbp *Process) GoroutinesInfo() ([]*G, error) {
 	return allg, nil
 }
 
+func (g *G) Thread() *Thread {
+	return g.thread
+}
+
 // Halt stops all threads.
 func (dbp *Process) Halt() (err error) {
 	if dbp.exited {

service/api/conversions.go

@@ -186,11 +186,17 @@ func ConvertFunction(fn *gosym.Func) *Function {
 
 // ConvertGoroutine converts from proc.G to api.Goroutine.
 func ConvertGoroutine(g *proc.G) *Goroutine {
+	th := g.Thread()
+	tid := 0
+	if th != nil {
+		tid = th.ID
+	}
 	return &Goroutine{
 		ID:             g.ID,
 		CurrentLoc:     ConvertLocation(g.CurrentLoc),
 		UserCurrentLoc: ConvertLocation(g.UserCurrent()),
 		GoStatementLoc: ConvertLocation(g.Go()),
+		ThreadID: tid,
 	}
 }
 

service/api/types.go

@@ -200,6 +200,8 @@ type Goroutine struct {
 	UserCurrentLoc Location `json:"userCurrentLoc"`
 	// Location of the go instruction that started this goroutine
 	GoStatementLoc Location `json:"goStatementLoc"`
+	// ID of the associated thread for running goroutines
+	ThreadID int `json:"threadID"`
 }
 
 // DebuggerCommand is a command which changes the debugger's execution state.

terminal/command.go

@@ -547,7 +547,11 @@ func formatGoroutine(g *api.Goroutine, fgl formatGoroutineLoc) string {
 		locname = "Go"
 		loc = g.GoStatementLoc
 	}
-	return fmt.Sprintf("%d - %s: %s", g.ID, locname, formatLocation(loc))
+	thread := ""
+	if g.ThreadID != 0 {
+		thread = fmt.Sprintf(" (thread %d)", g.ThreadID)
+	}
+	return fmt.Sprintf("%d - %s: %s%s", g.ID, locname, formatLocation(loc), thread)
 }
 
 func writeGoroutineLong(w io.Writer, g *api.Goroutine, prefix string) {