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| author | Ian Rogers <irogers@google.com> | 2020-05-19 23:36:52 -0700 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2020-05-28 10:03:27 -0300 |
| commit | a45badc7392b4613708748f6a2cc0c6f63a1c8d6 (patch) | |
| tree | c34d905a6e0f52add9f0310243c3c48e4091833f /tools | |
| parent | 45db55f2ef5e98ef096096efad975dc684a9493f (diff) | |
| download | linux-a45badc7392b4613708748f6a2cc0c6f63a1c8d6.tar.bz2 | |
perf expr: Allow numbers to be followed by a dot
Metrics like UNC_M_POWER_SELF_REFRESH encode 100 as "100." and
consequently the 100 is treated as a symbol. Alter the regular
expression to allow the dot to be before or after the number.
Note, this passed the pmu-events test as that tests the validity of a
number using strtod rather than lex code. strtod allows the dot after.
Add a test for this behavior.
Fixes: 26226a97724d (perf expr: Move expr lexer to flex)
Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/tests/expr.c | 1 | ||||
| -rw-r--r-- | tools/perf/util/expr.l | 2 |
2 files changed, 2 insertions, 1 deletions
diff --git a/tools/perf/tests/expr.c b/tools/perf/tests/expr.c index 13350c500e34..1cb02ca2b15f 100644 --- a/tools/perf/tests/expr.c +++ b/tools/perf/tests/expr.c @@ -38,6 +38,7 @@ int test__expr(struct test *t __maybe_unused, int subtest __maybe_unused) ret |= test(&ctx, "max(1,2) + 1", 3); ret |= test(&ctx, "1+1 if 3*4 else 0", 2); ret |= test(&ctx, "1.1 + 2.1", 3.2); + ret |= test(&ctx, ".1 + 2.", 2.1); if (ret) return ret; diff --git a/tools/perf/util/expr.l b/tools/perf/util/expr.l index ceab11bea6f9..f397bf8b1a48 100644 --- a/tools/perf/util/expr.l +++ b/tools/perf/util/expr.l @@ -81,7 +81,7 @@ static int str(yyscan_t scanner, int token, int runtime) } %} -number [0-9]*\.?[0-9]+ +number ([0-9]+\.?[0-9]*|[0-9]*\.?[0-9]+) sch [-,=] spec \\{sch} |