Support threaded heap profiles in pprof

    - Add a --thread N option to select profile for thread N (otherwise, all
      threads will be printed)
    - The $profile map now has a {threads} element that is a map from thread id to
      a profile that has the same format as the {profile} element
    - Refactor ReadHeapProfile into smaller components and use them to implement
      ReadThreadedHeapProfile
1 file changed