perf tools: Unwind properly location after REJECT
authorJiri Olsa <jolsa@kernel.org>
Thu, 12 Oct 2017 15:03:38 +0000 (17:03 +0200)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Fri, 27 Oct 2017 14:42:51 +0000 (11:42 -0300)
commit9445464bb8318e42e5232b37fc7218ed028517f6
tree6d5f5641d87fb9ad15fadca7a7c118d12919bbef
parent331c7cb307971eac38e9470340e10c87855bf4bc
perf tools: Unwind properly location after REJECT

We have defined YY_USER_ACTION to keep trace of the column location
during events parsing, but we need to clean it up when we call REJECT.

When REJECT is called, the lexer shrinks the text and re-runs the
matching, so we need to address it in resuming the previous location
value to keep it correct for error display, like:

Before:
  $ perf stat -e 'cpu/uops_executed.core,krava/'  true
  event syntax error: '..38;5;9:mi=01;05;37;41:su=48;5;196;38;5;15:sg=48;5;1\
1;38;5;16:ca=48;5;196;38;5;226:tw=48;5;10;38;5;16:ow=48;5;10;38;5;21:st=48;5;\
21;38;50
�'
                                  \___ unknown term

After:
  $ ./perf stat -e 'cpu/uops_executed.core,krava/'  true
  event syntax error: '..cuted.core,krava/'
                                    \___ unknown term

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Reported-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Tested-by: Andi Kleen <ak@linux.intel.com>
Cc: Changbin Du <changbin.du@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-vug2hchlny30jfsfrumbym26@git.kernel.org
Link: http://lkml.kernel.org/r/20171009140944.GD28623@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools/perf/util/parse-events.l