linux/tools/perf/util/pmu.l
Ian Rogers 3d88aec0d4 perf pmu: Make parser reentrant
By default bison uses global state for compatibility with yacc. Make
the parser reentrant so that it may be used in asynchronous and
multithreaded situations.

Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Gaosheng Cui <cuigaosheng1@huawei.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jing Zhang <renyu.zj@linux.alibaba.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20230406065224.2553640-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2023-04-06 21:40:28 -03:00

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%option prefix="perf_pmu_"
%option reentrant
%option bison-bridge
%{
#include <stdlib.h>
#include <linux/bitops.h>
#include "pmu.h"
#include "pmu-bison.h"
char *perf_pmu_get_text(yyscan_t yyscanner);
YYSTYPE *perf_pmu_get_lval(yyscan_t yyscanner);
static int value(yyscan_t scanner, int base)
{
YYSTYPE *yylval = perf_pmu_get_lval(scanner);
char *text = perf_pmu_get_text(scanner);
long num;
errno = 0;
num = strtoul(text, NULL, base);
if (errno)
return PP_ERROR;
yylval->num = num;
return PP_VALUE;
}
%}
num_dec [0-9]+
%%
{num_dec} { return value(yyscanner, 10); }
config { return PP_CONFIG; }
- { return '-'; }
: { return ':'; }
, { return ','; }
. { ; }
\n { ; }
%%
int perf_pmu_wrap(void *scanner __maybe_unused)
{
return 1;
}