[PATCH v3 0/8] perf timechart: Fix memory leaks

[Namhyung Kim <namhyung@kernel.org>]

Hello,

This patchset fixes memory leaks in the perf timechart code.
I've extended and verified the timechart test with ASAN.

I'm sending it with my previous work on backtrace optimization.

v3)
 * combine small optimization series

v2)
 * use zfree() and explicit clear for potential misuse  (Arnaldo)
 * fix a wrong condition in the draw_wakeups()  (Sashiko)
 * move misplaced hunk in the second commit to the first

Thanks,
Namhyung


Namhyung Kim (8):
  perf timechart: Don't pass @event to cat_backtrace()
  perf timechart: Generate backtrace only if needed
  perf timechart: Remove unused backtrace in trace_handler
  perf timechart: Remove unnecessary copy of backtrace
  perf timechart: Release event samples at the end
  perf timechart: Fix memory leaks during record
  perf timechart: Fix memory leaks in draw_wakeups()
  perf test: Update perf timechart test

 tools/perf/builtin-timechart.c      | 212 +++++++++++++++++++---------
 tools/perf/tests/shell/timechart.sh |  24 ++--
 2 files changed, 158 insertions(+), 78 deletions(-)

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2.55.0.rc0.799.gd6f94ed593-goog