Re: [PATCH 1/1] perf/util: initialize is_test value in expr__ctx_new()

[Arnaldo Carvalho de Melo <acme@kernel.org>]

On Wed, Nov 13, 2024 at 08:57:08AM -0800, Ian Rogers wrote:
> On Wed, Nov 13, 2024 at 8:13 AM James Clark <james.clark@linaro.org> wrote:
> > On 08/11/2024 2:34 pm, Levi Yun wrote:
> > > when expr_parse_ctx is allocated by expr_ctx_new(),
> > > expr_scanner_ctx->is_test isn't initialize, so it has garbage value.
> > > this can affects the result of expr__parse() return when it parses
> > > non-exist event literal according to garbage value.
> > >
> > > use calloc instead of malloc in expr_ctx_new() to fix this.
> > >
> > > Fixes: 3340a08354ac ("perf pmu-events: Fix testing with JEVENTS_ARCH=all")
> > > Signed-off-by: Levi Yun <yeoreum.yun@arm.com>
> > > ---
> > >   tools/perf/util/expr.c | 5 +----
> > >   1 file changed, 1 insertion(+), 4 deletions(-)
> > >
> > > diff --git a/tools/perf/util/expr.c b/tools/perf/util/expr.c
> > > index 5e3732bc2fa5..bc119501f091 100644
> > > --- a/tools/perf/util/expr.c
> > > +++ b/tools/perf/util/expr.c
> > > @@ -285,7 +285,7 @@ struct expr_parse_ctx *expr__ctx_new(void)
> > >   {
> > >       struct expr_parse_ctx *ctx;
> > >
> > > -     ctx = malloc(sizeof(struct expr_parse_ctx));
> > > +     ctx = calloc(1, sizeof(struct expr_parse_ctx));
> > >       if (!ctx)
> > >               return NULL;
> > >
> > > @@ -294,9 +294,6 @@ struct expr_parse_ctx *expr__ctx_new(void)
> > >               free(ctx);
> > >               return NULL;
> > >       }
> > > -     ctx->sctx.user_requested_cpu_list = NULL;
> > > -     ctx->sctx.runtime = 0;
> > > -     ctx->sctx.system_wide = false;
> > >
> > >       return ctx;
> > >   }
> > > --
> > > LEVI:{C3F47F37-75D8-414A-A8BA-3980EC8A46D7}
> > >
> > >
> >
> > Reviewed-by: James Clark <james.clark@linaro.org>
> 
> Reviewed-by: Ian Rogers <irogers@google.com>

Thanks, applied to perf-tools-next,

- Arnaldo