backport original PR198 with states for history#121

Merged

jonhoo merged 2 commits intojonhoo:masterfrom AnderEnder:feature/backport-origin-198-history-safe

Apr 15, 2019

+68-15

Commits on Apr 13, 2019

backport brendangregg/FlameGraph#198 with states for history
AnderEnder
committed

Commits on Apr 14, 2019

Merge branch 'master' into feature/backport-origin-198-history-safe
jonhoo
authored