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proc: fix panic when calling Ancestors on a parked goroutine (#1570)

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Fixes #1568
This commit is contained in:
Alessandro Arzilli
2019-06-03 19:41:33 +02:00
committed by Derek Parker
parent 21ac0eb4f8
commit 2d6d016bf1
3 changed files with 4 additions and 4 deletions
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4
pkg/proc/variables.go
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@ -659,8 +659,8 @@ func (g *G) StartLoc() Location {
var errTracebackAncestorsDisabled = errors.New("tracebackancestors is disabled")
// Ancestors returns the list of ancestors for g.
func (g *G) Ancestors(n int) ([]Ancestor, error) {
scope := globalScope(g.Thread.BinInfo(), g.Thread.BinInfo().Images[0], g.Thread)
func Ancestors(p Process, g *G, n int) ([]Ancestor, error) {
scope := globalScope(p.BinInfo(), p.BinInfo().Images[0], p.CurrentThread())
tbav, err := scope.EvalExpression("runtime.debug.tracebackancestors", loadSingleValue)
if err == nil && tbav.Unreadable == nil && tbav.Kind == reflect.Int {
tba, _ := constant.Int64Val(tbav.Value)