linux-kernel - Re: [PATCH v4 3/3] perf parse-events: add bison --file-prefix-map option

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Date:   Thu, 6 May 2021 17:15:10 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Denys Zagorui <dzagorui@...co.com>
Cc:     linux-kernel@...r.kernel.org, peterz@...radead.org,
        mingo@...hat.com, acme@...nel.org, mark.rutland@....com,
        alexander.shishkin@...ux.intel.com, namhyung@...nel.org
Subject: Re: [PATCH v4 3/3] perf parse-events: add bison --file-prefix-map
 option

On Fri, Apr 30, 2021 at 06:33:50AM -0700, Denys Zagorui wrote:
> bison stores full paths in generated files and those paths are stored in
> resulting perf binary. Starting from v3.7.1. those paths can be remapped
> by using --file-prefix-map option. So use this option if it possible to
> make perf binary more reproducible.
> 
> Signed-off-by: Denys Zagorui <dzagorui@...co.com>
> ---
>  tools/perf/Makefile.config | 9 +++++++++
>  tools/perf/util/Build      | 6 +++---
>  2 files changed, 12 insertions(+), 3 deletions(-)
> 
> diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
> index d8e59d31399a..2035bae6d5c5 100644
> --- a/tools/perf/Makefile.config
> +++ b/tools/perf/Makefile.config
> @@ -195,6 +195,12 @@ ifeq ($(call get-executable,$(BISON)),)
>    dummy := $(error Error: $(BISON) is missing on this system, please install it)
>  endif
>  
> +ifneq ($(OUTPUT),)
> +  ifeq ($(shell expr $(shell $(BISON) --version | grep bison | sed -e 's/.\+ \([0-9]\+\).\([0-9]\+\).\([0-9]\+\)/\1\2\3/g') \>\= 371), 1)
> +    BISON_FILE_PREFIX_MAP := --file-prefix-map=$(OUTPUT)=
> +  endif
> +endif

I'm on system with:

[root@...-02-guest15 perf]# bison --version
bison (GNU Bison) 3.7.6

but I don't see BISON_FILE_PREFIX_MAP set

[root@...-02-guest15 perf]# cat .config-detected | grep BISON_FILE_PREFIX_MAP
[root@...-02-guest15 perf]# 

jirka

> +
>  # Treat warnings as errors unless directed not to
>  ifneq ($(WERROR),0)
>    CORE_CFLAGS += -Werror
> @@ -1208,3 +1214,6 @@ $(call detected_var,LIBDIR)
>  $(call detected_var,GTK_CFLAGS)
>  $(call detected_var,PERL_EMBED_CCOPTS)
>  $(call detected_var,PYTHON_EMBED_CCOPTS)
> +ifneq ($(BISON_FILE_PREFIX_MAP),)
> +$(call detected_var,BISON_FILE_PREFIX_MAP)
> +endif
> diff --git a/tools/perf/util/Build b/tools/perf/util/Build
> index e3e12f9d4733..33476b1d28d5 100644
> --- a/tools/perf/util/Build
> +++ b/tools/perf/util/Build
> @@ -204,7 +204,7 @@ $(OUTPUT)util/parse-events-flex.c $(OUTPUT)util/parse-events-flex.h: util/parse-
>  
>  $(OUTPUT)util/parse-events-bison.c $(OUTPUT)util/parse-events-bison.h: util/parse-events.y
>  	$(call rule_mkdir)
> -	$(Q)$(call echo-cmd,bison)$(BISON) -v $< -d $(PARSER_DEBUG_BISON) \
> +	$(Q)$(call echo-cmd,bison)$(BISON) -v $< -d $(PARSER_DEBUG_BISON) $(BISON_FILE_PREFIX_MAP) \
>  		-o $(OUTPUT)util/parse-events-bison.c -p parse_events_
>  
>  $(OUTPUT)util/expr-flex.c $(OUTPUT)util/expr-flex.h: util/expr.l $(OUTPUT)util/expr-bison.c
> @@ -214,7 +214,7 @@ $(OUTPUT)util/expr-flex.c $(OUTPUT)util/expr-flex.h: util/expr.l $(OUTPUT)util/e
>  
>  $(OUTPUT)util/expr-bison.c $(OUTPUT)util/expr-bison.h: util/expr.y
>  	$(call rule_mkdir)
> -	$(Q)$(call echo-cmd,bison)$(BISON) -v $< -d $(PARSER_DEBUG_BISON) \
> +	$(Q)$(call echo-cmd,bison)$(BISON) -v $< -d $(PARSER_DEBUG_BISON) $(BISON_FILE_PREFIX_MAP) \
>  		-o $(OUTPUT)util/expr-bison.c -p expr_
>  
>  $(OUTPUT)util/pmu-flex.c $(OUTPUT)util/pmu-flex.h: util/pmu.l $(OUTPUT)util/pmu-bison.c
> @@ -224,7 +224,7 @@ $(OUTPUT)util/pmu-flex.c $(OUTPUT)util/pmu-flex.h: util/pmu.l $(OUTPUT)util/pmu-
>  
>  $(OUTPUT)util/pmu-bison.c $(OUTPUT)util/pmu-bison.h: util/pmu.y
>  	$(call rule_mkdir)
> -	$(Q)$(call echo-cmd,bison)$(BISON) -v $< -d $(PARSER_DEBUG_BISON) \
> +	$(Q)$(call echo-cmd,bison)$(BISON) -v $< -d $(PARSER_DEBUG_BISON) $(BISON_FILE_PREFIX_MAP) \
>  		-o $(OUTPUT)util/pmu-bison.c -p perf_pmu_
>  
>  FLEX_GE_26 := $(shell expr $(shell $(FLEX) --version | sed -e  's/flex \([0-9]\+\).\([0-9]\+\)/\1\2/g') \>\= 26)
> -- 
> 2.26.2.Cisco
>