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SubjectRe: [PATCH 00/12] Stitch LBR call stack (Perf Tools)
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On 3/6/2020 4:39 AM, Jiri Olsa wrote:
> On Fri, Feb 28, 2020 at 08:29:59AM -0800, kan.liang@linux.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@krava perf]$ gcc --version
> gcc (GCC) 9.2.1 20190827 (Red Hat 9.2.1-1)

My GCC version is too old. I will send V2 later to fix the error.

Thanks,
Kan

>
> jirka
>

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