From d66dccdb13c9748f27d8401b45c027953fc833e8 Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Fri, 11 Aug 2017 16:26:25 -0700 Subject: [PATCH] perf tools: Dedup events in expression parsing Avoid adding redundant events while parsing an expression. When we add an "other" event check first if it already exists. v2: Fix perf test failure. Signed-off-by: Andi Kleen Acked-by: Jiri Olsa Link: http://lkml.kernel.org/r/20170811232634.30465-10-andi@firstfloor.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/expr.y | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/tools/perf/util/expr.y b/tools/perf/util/expr.y index 5753c4f21534..432b8560cf51 100644 --- a/tools/perf/util/expr.y +++ b/tools/perf/util/expr.y @@ -181,6 +181,19 @@ void expr__ctx_init(struct parse_ctx *ctx) ctx->num_ids = 0; } +static bool already_seen(const char *val, const char *one, const char **other, + int num_other) +{ + int i; + + if (one && !strcasecmp(one, val)) + return true; + for (i = 0; i < num_other; i++) + if (!strcasecmp(other[i], val)) + return true; + return false; +} + int expr__find_other(const char *p, const char *one, const char ***other, int *num_otherp) { @@ -200,7 +213,7 @@ int expr__find_other(const char *p, const char *one, const char ***other, err = 0; break; } - if (tok == ID && (!one || strcasecmp(one, val.id))) { + if (tok == ID && !already_seen(val.id, one, *other, num_other)) { if (num_other >= EXPR_MAX_OTHER - 1) { pr_debug("Too many extra events in %s\n", orig); break; -- 2.45.2