Messages in this thread | | | Date | Mon, 15 Feb 2021 13:22:38 +0100 | From | Jiri Olsa <> | Subject | Re: [PATCH v3] perf tools: Fix arm64 build error with gcc-11 |
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On Sat, Feb 13, 2021 at 01:05:16PM +0800, Jianlin Lv wrote: > gcc version: 11.0.0 20210208 (experimental) (GCC) > > Following build error on arm64: > > ....... > In function ‘printf’, > inlined from ‘regs_dump__printf’ at util/session.c:1141:3, > inlined from ‘regs__printf’ at util/session.c:1169:2: > /usr/include/aarch64-linux-gnu/bits/stdio2.h:107:10: \ > error: ‘%-5s’ directive argument is null [-Werror=format-overflow=] > > 107 | return __printf_chk (__USE_FORTIFY_LEVEL - 1, __fmt, \ > __va_arg_pack ()); > > ...... > In function ‘fprintf’, > inlined from ‘perf_sample__fprintf_regs.isra’ at \ > builtin-script.c:622:14: > /usr/include/aarch64-linux-gnu/bits/stdio2.h:100:10: \ > error: ‘%5s’ directive argument is null [-Werror=format-overflow=] > 100 | return __fprintf_chk (__stream, __USE_FORTIFY_LEVEL - 1, __fmt, > 101 | __va_arg_pack ()); > > cc1: all warnings being treated as errors > ....... > > This patch fixes Wformat-overflow warnings. Add ternary operator, > The statement evaluates to "Unknown" if reg_name==NULL is met. > > Signed-off-by: Jianlin Lv <Jianlin.Lv@arm.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
thanks, jirka
> --- > v2: Add ternary operator to avoid similar errors in other arch. > v3: Declared reg_name in inner block. > --- > tools/perf/builtin-script.c | 4 +++- > tools/perf/util/scripting-engines/trace-event-python.c | 3 ++- > tools/perf/util/session.c | 3 ++- > 3 files changed, 7 insertions(+), 3 deletions(-) > > diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c > index 42dad4a0f8cf..0d52dc45b1c7 100644 > --- a/tools/perf/builtin-script.c > +++ b/tools/perf/builtin-script.c > @@ -643,7 +643,9 @@ static int perf_sample__fprintf_regs(struct regs_dump *regs, uint64_t mask, > > for_each_set_bit(r, (unsigned long *) &mask, sizeof(mask) * 8) { > u64 val = regs->regs[i++]; > - printed += fprintf(fp, "%5s:0x%"PRIx64" ", perf_reg_name(r), val); > + const char *reg_name = perf_reg_name(r); > + > + printed += fprintf(fp, "%5s:0x%"PRIx64" ", reg_name ?: "unknown", val); > } > > return printed; > diff --git a/tools/perf/util/scripting-engines/trace-event-python.c b/tools/perf/util/scripting-engines/trace-event-python.c > index c83c2c6564e0..768bdd4240f4 100644 > --- a/tools/perf/util/scripting-engines/trace-event-python.c > +++ b/tools/perf/util/scripting-engines/trace-event-python.c > @@ -699,10 +699,11 @@ static int regs_map(struct regs_dump *regs, uint64_t mask, char *bf, int size) > > for_each_set_bit(r, (unsigned long *) &mask, sizeof(mask) * 8) { > u64 val = regs->regs[i++]; > + const char *reg_name = perf_reg_name(r); > > printed += scnprintf(bf + printed, size - printed, > "%5s:0x%" PRIx64 " ", > - perf_reg_name(r), val); > + reg_name ?: "unknown", val); > } > > return printed; > diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c > index 25adbcce0281..2b40f1c431a3 100644 > --- a/tools/perf/util/session.c > +++ b/tools/perf/util/session.c > @@ -1138,9 +1138,10 @@ static void regs_dump__printf(u64 mask, u64 *regs) > > for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) { > u64 val = regs[i++]; > + const char *reg_name = perf_reg_name(rid); > > printf(".... %-5s 0x%016" PRIx64 "\n", > - perf_reg_name(rid), val); > + reg_name ?: "unknown", val); > } > } > > -- > 2.25.1 >
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