[PATCH 00/16] fix some perf issues detected by ASan

[Changbin Du]

AddressSanitizer (or ASan) and UndefinedBehaviorSanitizer (or UBSan) are
very useful tools to detect program bugs. This series fixed some issues
disclosed by ASan.

AddressSanitizer (or ASan) is a GCC feature that detects memory corruption bugs
such as buffer overflows or memory leaks.
  $ cd tools/perf
  $ make DEBUG=1 EXTRA_CFLAGS='-fno-omit-frame-pointer -fsanitize=address'
  $ ASAN_OPTIONS=log_path=asan.log ./perf record -a
ASan outputs all detected issues into log file 'asan.log.<pid>'.

Note that this only fixes parts of the detected issues. There are many remaining
to be fixed[1].

[1] http://104.238.181.70:8080/asan.log.32555.txt

Changbin Du (16):
  perf: add doc for how to build perf with Asan and UBSan
  perf: list: fix memory leak in function is_event_supported
  perf: fix errors under optimization level '-Og'
  perf: fix an error in config template
  perf: fix a memory leak in collect_config
  perf: fix memory leak in print_sdt_events()
  perf: top: fix heap-use-after-free issue
  perf: top: fix error handing in cmd_top()
  perf: missed a map__put() in error case
  perf: remove map from names tree in __maps__remove
  perf: purge all maps from the names tree
  perf: top: fix global-buffer-overflow issue
  perf: free all counts in perf_evsel__exit
  perf: fix a memory leak of cpu_map object
  perf: fix memory leak by expr__find_other
  perf: fix a memory leak in test__perf_evsel__tp_sched_test

 tools/lib/bpf/libbpf.c                     |  2 +-
 tools/perf/Documentation/Build.txt         | 20 +++++++++
 tools/perf/Documentation/perf-config.txt   |  2 +-
 tools/perf/bench/epoll-ctl.c               |  2 +-
 tools/perf/bench/epoll-wait.c              |  2 +-
 tools/perf/builtin-top.c                   | 47 ++++++++++------------
 tools/perf/tests/backward-ring-buffer.c    |  2 +-
 tools/perf/tests/evsel-tp-sched.c          |  1 +
 tools/perf/tests/expr.c                    |  5 ++-
 tools/perf/tests/openat-syscall-all-cpus.c |  4 +-
 tools/perf/util/build-id.c                 |  1 +
 tools/perf/util/config.c                   |  3 +-
 tools/perf/util/counts.c                   | 18 +++++++++
 tools/perf/util/counts.h                   |  4 ++
 tools/perf/util/evsel.c                    |  2 +
 tools/perf/util/hist.c                     |  4 +-
 tools/perf/util/map.c                      | 18 +++++++++
 tools/perf/util/ordered-events.c           |  2 +
 tools/perf/util/parse-events.c             |  2 +
 tools/perf/util/stat.c                     | 18 ---------
 20 files changed, 106 insertions(+), 53 deletions(-)

-- 
2.19.1