linux-kernel - Re: [PATCH 00/12] Stitch LBR call stack (Perf Tools)

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Message-ID: <20200306093940.GD281906@krava>
Date:   Fri, 6 Mar 2020 10:39:40 +0100
From:   Jiri Olsa <jolsa@...hat.com>
To:     kan.liang@...ux.intel.com
Cc:     acme@...nel.org, peterz@...radead.org, mingo@...hat.com,
        linux-kernel@...r.kernel.org, namhyung@...nel.org,
        adrian.hunter@...el.com, mathieu.poirier@...aro.org,
        ravi.bangoria@...ux.ibm.com, alexey.budankov@...ux.intel.com,
        vitaly.slobodskoy@...el.com, pavel.gerasimov@...el.com,
        mpe@...erman.id.au, eranian@...gle.com, ak@...ux.intel.com
Subject: Re: [PATCH 00/12] Stitch LBR call stack (Perf Tools)

On Fri, Feb 28, 2020 at 08:29:59AM -0800, kan.liang@...ux.intel.com wrote:

SNIP

> Kan Liang (12):
>   perf tools: Add hw_idx in struct branch_stack
>   perf tools: Support PERF_SAMPLE_BRANCH_HW_INDEX
>   perf header: Add check for event attr
>   perf pmu: Add support for PMU capabilities

hi,
I'm getting compile error:

	util/pmu.c: In function ‘perf_pmu__caps_parse’:
	util/pmu.c:1620:32: error: ‘%s’ directive output may be truncated writing up to 255 bytes into a region of size between 0 and 4095 [-Werror=format-truncation=]
	 1620 |   snprintf(path, PATH_MAX, "%s/%s", caps_path, name);
	      |                                ^~
	In file included from /usr/include/stdio.h:867,
			 from util/pmu.c:12:
	/usr/include/bits/stdio2.h:67:10: note: ‘__builtin___snprintf_chk’ output between 2 and 4352 bytes into a destination of size 4096
	   67 |   return __builtin___snprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
	      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	   68 |        __bos (__s), __fmt, __va_arg_pack ());
	      |        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	cc1: all warnings being treated as errors

	[jolsa@...va perf]$ gcc --version
	gcc (GCC) 9.2.1 20190827 (Red Hat 9.2.1-1)

jirka