From: Jiri Olsa <[email protected]>
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 <[email protected]>
Reported-by: Arnaldo Carvalho de Melo <[email protected]>
Tested-by: Arnaldo Carvalho de Melo <[email protected]>
Tested-by: Andi Kleen <[email protected]>
Cc: Changbin Du <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Jin Yao <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Wang Nan <[email protected]>
Link: http://lkml.kernel.org/n/[email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
---
tools/perf/util/parse-events.l | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/tools/perf/util/parse-events.l b/tools/perf/util/parse-events.l
index dcfdafdc2f1c..6680e4fb7967 100644
--- a/tools/perf/util/parse-events.l
+++ b/tools/perf/util/parse-events.l
@@ -154,6 +154,10 @@ do {
\
yycolumn += yyleng; \
} while (0);
+#define USER_REJECT \
+ yycolumn -= yyleng; \
+ REJECT
+
%}
%x mem
@@ -335,8 +339,8 @@ r{num_raw_hex} { return raw(yyscanner); }
{num_hex} { return value(yyscanner, 16); }
{modifier_event} { return str(yyscanner, PE_MODIFIER_EVENT); }
-{bpf_object} { if (!isbpf(yyscanner)) REJECT; return str(yyscanner,
PE_BPF_OBJECT); }
-{bpf_source} { if (!isbpf(yyscanner)) REJECT; return str(yyscanner,
PE_BPF_SOURCE); }
+{bpf_object} { if (!isbpf(yyscanner)) USER_REJECT; return
str(yyscanner, PE_BPF_OBJECT); }
+{bpf_source} { if (!isbpf(yyscanner)) USER_REJECT; return
str(yyscanner, PE_BPF_SOURCE); }
{name} { return pmu_str_check(yyscanner); }
"/" { BEGIN(config); return '/'; }
- { return '-'; }
--
2.13.6
