linux/tools/perf/util/perf_regs.h
Jianlin Lv 067012974c perf tools: Fix arm64 build error with gcc-11
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💯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 helper function to
convert NULL to "unknown".

Signed-off-by: Jianlin Lv <Jianlin.Lv@arm.com>
Reviewed-by: John Garry <john.garry@huawei.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Anju T Sudhakar <anju@linux.vnet.ibm.com>
Cc: Athira Jajeev <atrajeev@linux.vnet.ibm.com>
Cc: Guo Ren <guoren@kernel.org>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: iecedge@gmail.com
Cc: linux-csky@vger.kernel.org
Cc: linux-riscv@lists.infradead.org
Link: http://lore.kernel.org/lkml/20210218031245.2078492-1-Jianlin.Lv@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2021-02-18 16:24:43 -03:00

62 lines
1.3 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __PERF_REGS_H
#define __PERF_REGS_H
#include <linux/types.h>
#include <linux/compiler.h>
struct regs_dump;
struct sample_reg {
const char *name;
uint64_t mask;
};
#define SMPL_REG(n, b) { .name = #n, .mask = 1ULL << (b) }
#define SMPL_REG2(n, b) { .name = #n, .mask = 3ULL << (b) }
#define SMPL_REG_END { .name = NULL }
enum {
SDT_ARG_VALID = 0,
SDT_ARG_SKIP,
};
int arch_sdt_arg_parse_op(char *old_op, char **new_op);
uint64_t arch__intr_reg_mask(void);
uint64_t arch__user_reg_mask(void);
#ifdef HAVE_PERF_REGS_SUPPORT
extern const struct sample_reg sample_reg_masks[];
#include <perf_regs.h>
#define DWARF_MINIMAL_REGS ((1ULL << PERF_REG_IP) | (1ULL << PERF_REG_SP))
int perf_reg_value(u64 *valp, struct regs_dump *regs, int id);
static inline const char *perf_reg_name(int id)
{
const char *reg_name = __perf_reg_name(id);
return reg_name ?: "unknown";
}
#else
#define PERF_REGS_MASK 0
#define PERF_REGS_MAX 0
#define DWARF_MINIMAL_REGS PERF_REGS_MASK
static inline const char *perf_reg_name(int id __maybe_unused)
{
return "unknown";
}
static inline int perf_reg_value(u64 *valp __maybe_unused,
struct regs_dump *regs __maybe_unused,
int id __maybe_unused)
{
return 0;
}
#endif /* HAVE_PERF_REGS_SUPPORT */
#endif /* __PERF_REGS_H */