Introduce perf_{evsel, evlist}__open_opt with extensible structure opts.
The mechanism of the extensible structure opts imitates
tools/lib/bpf/libbpf.h. This allows the user to set the open_flags
specified in perf_event_open and a signal handler to receive overflow
notifications for sampling events.
Signed-off-by: Shunsuke Nakamura <[email protected]>
---
tools/lib/perf/Documentation/libperf.txt | 14 +++
tools/lib/perf/evlist.c | 20 +++++
tools/lib/perf/evsel.c | 105 +++++++++++++++++++++++
tools/lib/perf/include/perf/evlist.h | 3 +
tools/lib/perf/include/perf/evsel.h | 26 ++++++
tools/lib/perf/internal.h | 44 ++++++++++
tools/lib/perf/libperf.map | 2 +
7 files changed, 214 insertions(+)
diff --git a/tools/lib/perf/Documentation/libperf.txt b/tools/lib/perf/Documentation/libperf.txt
index ae55e62fc4ce..700c1ce15159 100644
--- a/tools/lib/perf/Documentation/libperf.txt
+++ b/tools/lib/perf/Documentation/libperf.txt
@@ -131,6 +131,20 @@ SYNOPSIS
};
};
+ struct perf_evsel_open_opts {
+ /* size of this struct, for forward/backward compatibility */
+ size_t sz;
+
+ unsigned long open_flags; /* perf_event_open flags */
+ int flags; /* fcntl flags */
+ unsigned int signal;
+ int owner_type;
+ struct sigaction *sig;
+ };
+ #define perf_evsel_open_opts__last_field sig
+
+ #define LIBPERF_OPTS(TYPE, NAME, ...)
+
struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr);
void perf_evsel__delete(struct perf_evsel *evsel);
int perf_evsel__open(struct perf_evsel *evsel, struct perf_cpu_map *cpus,
diff --git a/tools/lib/perf/evlist.c b/tools/lib/perf/evlist.c
index 9a770bfdc804..6f136905d249 100644
--- a/tools/lib/perf/evlist.c
+++ b/tools/lib/perf/evlist.c
@@ -666,3 +666,23 @@ void perf_evlist__set_leader(struct perf_evlist *evlist)
__perf_evlist__set_leader(&evlist->entries, first);
}
}
+
+int perf_evlist__open_opts(struct perf_evlist *evlist,
+ struct perf_evsel_open_opts *opts)
+{
+ struct perf_evsel *evsel;
+ int err;
+
+ perf_evlist__for_each_entry(evlist, evsel) {
+ err = perf_evsel__open_opts(evsel, evsel->cpus,
+ evsel->threads, opts);
+ if (err < 0)
+ goto out_err;
+ }
+
+ return 0;
+
+out_err:
+ perf_evlist__close(evlist);
+ return err;
+}
diff --git a/tools/lib/perf/evsel.c b/tools/lib/perf/evsel.c
index b17842581dea..db9b7274feb5 100644
--- a/tools/lib/perf/evsel.c
+++ b/tools/lib/perf/evsel.c
@@ -1,4 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
#include <errno.h>
#include <unistd.h>
#include <sys/syscall.h>
@@ -16,8 +19,12 @@
#include <internal/lib.h>
#include <linux/string.h>
#include <sys/ioctl.h>
+#include <signal.h>
+#include <fcntl.h>
+#include <sys/types.h>
#include <sys/mman.h>
#include <asm/bug.h>
+#include "internal.h"
void perf_evsel__init(struct perf_evsel *evsel, struct perf_event_attr *attr,
int idx)
@@ -511,3 +518,101 @@ void perf_counts_values__scale(struct perf_counts_values *count,
if (pscaled)
*pscaled = scaled;
}
+
+static int perf_evsel__run_fcntl(struct perf_evsel *evsel,
+ unsigned int cmd, unsigned long arg,
+ int cpu_map_idx)
+{
+ int thread;
+
+ for (thread = 0; thread < xyarray__max_y(evsel->fd); thread++) {
+ int err;
+ int *fd = FD(evsel, cpu_map_idx, thread);
+
+ if (!fd || *fd < 0)
+ return -1;
+
+ err = fcntl(*fd, cmd, arg);
+
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+static int perf_evsel__set_signal_handler(struct perf_evsel *evsel,
+ struct perf_evsel_open_opts *opts)
+{
+ unsigned int flags;
+ unsigned int signal;
+ struct f_owner_ex owner;
+ struct sigaction *sig;
+ int cpu_map_idx;
+ int err = 0;
+
+ flags = OPTS_GET(opts, flags, (O_RDWR | O_NONBLOCK | O_ASYNC));
+ signal = OPTS_GET(opts, signal, SIGIO);
+ owner.type = OPTS_GET(opts, owner_type, F_OWNER_PID);
+ sig = OPTS_GET(opts, sig, NULL);
+
+ if (flags == 0 && signal == 0 && !owner.type == 0 && sig == 0)
+ return err;
+
+ err = sigaction(signal, sig, NULL);
+ if (err)
+ return err;
+
+ switch (owner.type) {
+ case F_OWNER_PID:
+ owner.pid = getpid();
+ break;
+ case F_OWNER_TID:
+ owner.pid = syscall(SYS_gettid);
+ break;
+ case F_OWNER_PGRP:
+ default:
+ return -1;
+ }
+
+ for (cpu_map_idx = 0; cpu_map_idx < xyarray__max_x(evsel->fd); cpu_map_idx++) {
+ err = perf_evsel__run_fcntl(evsel, F_SETFL, flags, cpu_map_idx);
+ if (err)
+ return err;
+
+ err = perf_evsel__run_fcntl(evsel, F_SETSIG, signal, cpu_map_idx);
+ if (err)
+ return err;
+
+ err = perf_evsel__run_fcntl(evsel, F_SETOWN_EX,
+ (unsigned long)&owner, cpu_map_idx);
+ if (err)
+ return err;
+ }
+
+ return err;
+}
+
+int perf_evsel__open_opts(struct perf_evsel *evsel, struct perf_cpu_map *cpus,
+ struct perf_thread_map *threads,
+ struct perf_evsel_open_opts *opts)
+{
+ int err = 0;
+
+ if (!OPTS_VALID(opts, perf_evsel_open_opts)) {
+ err = -EINVAL;
+ return err;
+ }
+
+ evsel->open_flags = OPTS_GET(opts, open_flags, 0);
+
+ err = perf_evsel__open(evsel, cpus, threads);
+ if (err)
+ return err;
+
+ err = perf_evsel__set_signal_handler(evsel, opts);
+ if (err)
+ return err;
+
+ return err;
+}
diff --git a/tools/lib/perf/include/perf/evlist.h b/tools/lib/perf/include/perf/evlist.h
index 9ca399d49bb4..6eff1e9b3481 100644
--- a/tools/lib/perf/include/perf/evlist.h
+++ b/tools/lib/perf/include/perf/evlist.h
@@ -9,6 +9,7 @@ struct perf_evlist;
struct perf_evsel;
struct perf_cpu_map;
struct perf_thread_map;
+struct perf_evsel_open_opts;
LIBPERF_API void perf_evlist__add(struct perf_evlist *evlist,
struct perf_evsel *evsel);
@@ -47,4 +48,6 @@ LIBPERF_API struct perf_mmap *perf_evlist__next_mmap(struct perf_evlist *evlist,
(pos) = perf_evlist__next_mmap((evlist), (pos), overwrite))
LIBPERF_API void perf_evlist__set_leader(struct perf_evlist *evlist);
+LIBPERF_API int perf_evlist__open_opts(struct perf_evlist *evlist,
+ struct perf_evsel_open_opts *opts);
#endif /* __LIBPERF_EVLIST_H */
diff --git a/tools/lib/perf/include/perf/evsel.h b/tools/lib/perf/include/perf/evsel.h
index 360ced734add..ecf30bc6303f 100644
--- a/tools/lib/perf/include/perf/evsel.h
+++ b/tools/lib/perf/include/perf/evsel.h
@@ -5,6 +5,7 @@
#include <stdint.h>
#include <perf/core.h>
#include <stdbool.h>
+#include <signal.h>
#include <linux/types.h>
struct perf_evsel;
@@ -23,6 +24,27 @@ struct perf_counts_values {
};
};
+struct perf_evsel_open_opts {
+ /* size of this struct, for forward/backward compatibility */
+ size_t sz;
+
+ unsigned long open_flags; /* perf_event_open flags */
+ int flags; /* fcntl flags */
+ unsigned int signal;
+ int owner_type;
+ struct sigaction *sig;
+};
+#define perf_evsel_open_opts__last_field sig
+
+#define LIBPERF_OPTS(TYPE, NAME, ...) \
+ struct TYPE NAME = ({ \
+ memset(&NAME, 0, sizeof(struct TYPE)); \
+ (struct TYPE) { \
+ .sz = sizeof(struct TYPE), \
+ __VA_ARGS__ \
+ }; \
+ })
+
LIBPERF_API struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr);
LIBPERF_API void perf_evsel__delete(struct perf_evsel *evsel);
LIBPERF_API int perf_evsel__open(struct perf_evsel *evsel, struct perf_cpu_map *cpus,
@@ -48,5 +70,9 @@ LIBPERF_API struct perf_thread_map *perf_evsel__threads(struct perf_evsel *evsel
LIBPERF_API struct perf_event_attr *perf_evsel__attr(struct perf_evsel *evsel);
LIBPERF_API void perf_counts_values__scale(struct perf_counts_values *count,
bool scale, __s8 *pscaled);
+LIBPERF_API int perf_evsel__open_opts(struct perf_evsel *evsel,
+ struct perf_cpu_map *cpus,
+ struct perf_thread_map *threads,
+ struct perf_evsel_open_opts *opts);
#endif /* __LIBPERF_EVSEL_H */
diff --git a/tools/lib/perf/internal.h b/tools/lib/perf/internal.h
index 2c27e158de6b..637bf6793c26 100644
--- a/tools/lib/perf/internal.h
+++ b/tools/lib/perf/internal.h
@@ -20,4 +20,48 @@ do { \
#define pr_debug2(fmt, ...) __pr(LIBPERF_DEBUG2, fmt, ##__VA_ARGS__)
#define pr_debug3(fmt, ...) __pr(LIBPERF_DEBUG3, fmt, ##__VA_ARGS__)
+static inline bool libperf_is_mem_zeroed(const char *p, ssize_t len)
+{
+ while (len > 0) {
+ if (*p)
+ return false;
+ p++;
+ len--;
+ }
+ return true;
+}
+
+static inline bool libperf_validate_opts(const char *opts,
+ size_t opts_sz, size_t user_sz,
+ const char *type_name)
+{
+ if (user_sz < sizeof(size_t)) {
+ pr_warning("%s size (%zu) is too small\n", type_name, user_sz);
+ return false;
+ }
+ if (!libperf_is_mem_zeroed(opts + opts_sz, (ssize_t)user_sz - opts_sz)) {
+ pr_warning("%s has non-zero extra bytes\n", type_name);
+ return false;
+ }
+ return true;
+}
+
+# define offsetofend(TYPE, FIELD) \
+ (offsetof(TYPE, FIELD) + sizeof(((TYPE *)0)->FIELD))
+
+#define OPTS_VALID(opts, type) \
+ (!(opts) || libperf_validate_opts((const char *)opts, \
+ offsetofend(struct type, \
+ type##__last_field), \
+ (opts)->sz, #type))
+#define OPTS_HAS(opts, field) \
+ ((opts) && opts->sz >= offsetofend(typeof(*(opts)), field))
+#define OPTS_GET(opts, field, fallback_value) \
+ (OPTS_HAS(opts, field) ? (opts)->field : fallback_value)
+#define OPTS_SET(opts, field, value) \
+ do { \
+ if (OPTS_HAS(opts, field)) \
+ (opts)->field = value; \
+ } while (0)
+
#endif /* __LIBPERF_INTERNAL_H */
diff --git a/tools/lib/perf/libperf.map b/tools/lib/perf/libperf.map
index ab0f44e9bb57..534614fbbb26 100644
--- a/tools/lib/perf/libperf.map
+++ b/tools/lib/perf/libperf.map
@@ -24,6 +24,7 @@ LIBPERF_0.0.1 {
perf_evsel__enable;
perf_evsel__disable;
perf_evsel__open;
+ perf_evsel__open_opts;
perf_evsel__close;
perf_evsel__mmap;
perf_evsel__munmap;
@@ -39,6 +40,7 @@ LIBPERF_0.0.1 {
perf_evlist__new;
perf_evlist__delete;
perf_evlist__open;
+ perf_evlist__open_opts;
perf_evlist__close;
perf_evlist__enable;
perf_evlist__disable;
--
2.25.1
On Fri, Mar 25, 2022 at 01:38:26PM +0900, Shunsuke Nakamura wrote:
SNIP
> diff --git a/tools/lib/perf/evsel.c b/tools/lib/perf/evsel.c
> index b17842581dea..db9b7274feb5 100644
> --- a/tools/lib/perf/evsel.c
> +++ b/tools/lib/perf/evsel.c
> @@ -1,4 +1,7 @@
> // SPDX-License-Identifier: GPL-2.0
> +#ifndef _GNU_SOURCE
> +#define _GNU_SOURCE
> +#endif
I think we can make this global set in Makefile, like we do in perf
jirka
On Fri, Mar 25, 2022 at 01:38:26PM +0900, Shunsuke Nakamura wrote:
> Introduce perf_{evsel, evlist}__open_opt with extensible structure opts.
> The mechanism of the extensible structure opts imitates
> tools/lib/bpf/libbpf.h. This allows the user to set the open_flags
> specified in perf_event_open and a signal handler to receive overflow
> notifications for sampling events.
>
> Signed-off-by: Shunsuke Nakamura <[email protected]>
> ---
> tools/lib/perf/Documentation/libperf.txt | 14 +++
> tools/lib/perf/evlist.c | 20 +++++
> tools/lib/perf/evsel.c | 105 +++++++++++++++++++++++
> tools/lib/perf/include/perf/evlist.h | 3 +
> tools/lib/perf/include/perf/evsel.h | 26 ++++++
> tools/lib/perf/internal.h | 44 ++++++++++
> tools/lib/perf/libperf.map | 2 +
> 7 files changed, 214 insertions(+)
>
> diff --git a/tools/lib/perf/Documentation/libperf.txt b/tools/lib/perf/Documentation/libperf.txt
> index ae55e62fc4ce..700c1ce15159 100644
> --- a/tools/lib/perf/Documentation/libperf.txt
> +++ b/tools/lib/perf/Documentation/libperf.txt
> @@ -131,6 +131,20 @@ SYNOPSIS
> };
> };
>
> + struct perf_evsel_open_opts {
> + /* size of this struct, for forward/backward compatibility */
> + size_t sz;
> +
> + unsigned long open_flags; /* perf_event_open flags */
> + int flags; /* fcntl flags */
> + unsigned int signal;
> + int owner_type;
> + struct sigaction *sig;
> + };
> + #define perf_evsel_open_opts__last_field sig
> +
> + #define LIBPERF_OPTS(TYPE, NAME, ...)
> +
SNIP
> +
> +int perf_evsel__open_opts(struct perf_evsel *evsel, struct perf_cpu_map *cpus,
> + struct perf_thread_map *threads,
> + struct perf_evsel_open_opts *opts)
> +{
> + int err = 0;
> +
> + if (!OPTS_VALID(opts, perf_evsel_open_opts)) {
> + err = -EINVAL;
> + return err;
> + }
> +
> + evsel->open_flags = OPTS_GET(opts, open_flags, 0);
> +
> + err = perf_evsel__open(evsel, cpus, threads);
> + if (err)
> + return err;
> +
> + err = perf_evsel__set_signal_handler(evsel, opts);
> + if (err)
> + return err;
please move the signal stuff handling into separate patch
together with the related fields in opts struct
thanks,
jirka
> +
> + return err;
> +}
> diff --git a/tools/lib/perf/include/perf/evlist.h b/tools/lib/perf/include/perf/evlist.h
> index 9ca399d49bb4..6eff1e9b3481 100644
> --- a/tools/lib/perf/include/perf/evlist.h
> +++ b/tools/lib/perf/include/perf/evlist.h
> @@ -9,6 +9,7 @@ struct perf_evlist;
> struct perf_evsel;
> struct perf_cpu_map;
> struct perf_thread_map;
> +struct perf_evsel_open_opts;
>
> LIBPERF_API void perf_evlist__add(struct perf_evlist *evlist,
> struct perf_evsel *evsel);
> @@ -47,4 +48,6 @@ LIBPERF_API struct perf_mmap *perf_evlist__next_mmap(struct perf_evlist *evlist,
> (pos) = perf_evlist__next_mmap((evlist), (pos), overwrite))
>
> LIBPERF_API void perf_evlist__set_leader(struct perf_evlist *evlist);
> +LIBPERF_API int perf_evlist__open_opts(struct perf_evlist *evlist,
> + struct perf_evsel_open_opts *opts);
> #endif /* __LIBPERF_EVLIST_H */
> diff --git a/tools/lib/perf/include/perf/evsel.h b/tools/lib/perf/include/perf/evsel.h
> index 360ced734add..ecf30bc6303f 100644
> --- a/tools/lib/perf/include/perf/evsel.h
> +++ b/tools/lib/perf/include/perf/evsel.h
> @@ -5,6 +5,7 @@
> #include <stdint.h>
> #include <perf/core.h>
> #include <stdbool.h>
> +#include <signal.h>
> #include <linux/types.h>
>
> struct perf_evsel;
> @@ -23,6 +24,27 @@ struct perf_counts_values {
> };
> };
>
> +struct perf_evsel_open_opts {
> + /* size of this struct, for forward/backward compatibility */
> + size_t sz;
> +
> + unsigned long open_flags; /* perf_event_open flags */
> + int flags; /* fcntl flags */
> + unsigned int signal;
> + int owner_type;
> + struct sigaction *sig;
> +};
> +#define perf_evsel_open_opts__last_field sig
> +
> +#define LIBPERF_OPTS(TYPE, NAME, ...) \
> + struct TYPE NAME = ({ \
> + memset(&NAME, 0, sizeof(struct TYPE)); \
> + (struct TYPE) { \
> + .sz = sizeof(struct TYPE), \
> + __VA_ARGS__ \
> + }; \
> + })
> +
> LIBPERF_API struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr);
> LIBPERF_API void perf_evsel__delete(struct perf_evsel *evsel);
> LIBPERF_API int perf_evsel__open(struct perf_evsel *evsel, struct perf_cpu_map *cpus,
> @@ -48,5 +70,9 @@ LIBPERF_API struct perf_thread_map *perf_evsel__threads(struct perf_evsel *evsel
> LIBPERF_API struct perf_event_attr *perf_evsel__attr(struct perf_evsel *evsel);
> LIBPERF_API void perf_counts_values__scale(struct perf_counts_values *count,
> bool scale, __s8 *pscaled);
> +LIBPERF_API int perf_evsel__open_opts(struct perf_evsel *evsel,
> + struct perf_cpu_map *cpus,
> + struct perf_thread_map *threads,
> + struct perf_evsel_open_opts *opts);
>
> #endif /* __LIBPERF_EVSEL_H */
> diff --git a/tools/lib/perf/internal.h b/tools/lib/perf/internal.h
> index 2c27e158de6b..637bf6793c26 100644
> --- a/tools/lib/perf/internal.h
> +++ b/tools/lib/perf/internal.h
> @@ -20,4 +20,48 @@ do { \
> #define pr_debug2(fmt, ...) __pr(LIBPERF_DEBUG2, fmt, ##__VA_ARGS__)
> #define pr_debug3(fmt, ...) __pr(LIBPERF_DEBUG3, fmt, ##__VA_ARGS__)
>
> +static inline bool libperf_is_mem_zeroed(const char *p, ssize_t len)
> +{
> + while (len > 0) {
> + if (*p)
> + return false;
> + p++;
> + len--;
> + }
> + return true;
> +}
> +
> +static inline bool libperf_validate_opts(const char *opts,
> + size_t opts_sz, size_t user_sz,
> + const char *type_name)
> +{
> + if (user_sz < sizeof(size_t)) {
> + pr_warning("%s size (%zu) is too small\n", type_name, user_sz);
> + return false;
> + }
> + if (!libperf_is_mem_zeroed(opts + opts_sz, (ssize_t)user_sz - opts_sz)) {
> + pr_warning("%s has non-zero extra bytes\n", type_name);
> + return false;
> + }
> + return true;
> +}
> +
> +# define offsetofend(TYPE, FIELD) \
> + (offsetof(TYPE, FIELD) + sizeof(((TYPE *)0)->FIELD))
> +
> +#define OPTS_VALID(opts, type) \
> + (!(opts) || libperf_validate_opts((const char *)opts, \
> + offsetofend(struct type, \
> + type##__last_field), \
> + (opts)->sz, #type))
> +#define OPTS_HAS(opts, field) \
> + ((opts) && opts->sz >= offsetofend(typeof(*(opts)), field))
> +#define OPTS_GET(opts, field, fallback_value) \
> + (OPTS_HAS(opts, field) ? (opts)->field : fallback_value)
> +#define OPTS_SET(opts, field, value) \
> + do { \
> + if (OPTS_HAS(opts, field)) \
> + (opts)->field = value; \
> + } while (0)
> +
> #endif /* __LIBPERF_INTERNAL_H */
> diff --git a/tools/lib/perf/libperf.map b/tools/lib/perf/libperf.map
> index ab0f44e9bb57..534614fbbb26 100644
> --- a/tools/lib/perf/libperf.map
> +++ b/tools/lib/perf/libperf.map
> @@ -24,6 +24,7 @@ LIBPERF_0.0.1 {
> perf_evsel__enable;
> perf_evsel__disable;
> perf_evsel__open;
> + perf_evsel__open_opts;
> perf_evsel__close;
> perf_evsel__mmap;
> perf_evsel__munmap;
> @@ -39,6 +40,7 @@ LIBPERF_0.0.1 {
> perf_evlist__new;
> perf_evlist__delete;
> perf_evlist__open;
> + perf_evlist__open_opts;
> perf_evlist__close;
> perf_evlist__enable;
> perf_evlist__disable;
> --
> 2.25.1
>
Hi jirka
> On Fri, Mar 25, 2022 at 01:38:26PM +0900, Shunsuke Nakamura wrote:
> > Introduce perf_{evsel, evlist}__open_opt with extensible structure opts.
> > The mechanism of the extensible structure opts imitates
> > tools/lib/bpf/libbpf.h. This allows the user to set the open_flags
> > specified in perf_event_open and a signal handler to receive overflow
> > notifications for sampling events.
> >
> > Signed-off-by: Shunsuke Nakamura <[email protected]>
> > ---
> > tools/lib/perf/Documentation/libperf.txt | 14 +++
> > tools/lib/perf/evlist.c | 20 +++++
> > tools/lib/perf/evsel.c | 105
> +++++++++++++++++++++++
> > tools/lib/perf/include/perf/evlist.h | 3 +
> > tools/lib/perf/include/perf/evsel.h | 26 ++++++
> > tools/lib/perf/internal.h | 44 ++++++++++
> > tools/lib/perf/libperf.map | 2 +
> > 7 files changed, 214 insertions(+)
> >
> > diff --git a/tools/lib/perf/Documentation/libperf.txt
> > b/tools/lib/perf/Documentation/libperf.txt
> > index ae55e62fc4ce..700c1ce15159 100644
> > --- a/tools/lib/perf/Documentation/libperf.txt
> > +++ b/tools/lib/perf/Documentation/libperf.txt
> > @@ -131,6 +131,20 @@ SYNOPSIS
> > };
> > };
> >
> > + struct perf_evsel_open_opts {
> > + /* size of this struct, for forward/backward compatibility */
> > + size_t sz;
> > +
> > + unsigned long open_flags; /* perf_event_open flags */
> > + int flags; /* fcntl flags */
> > + unsigned int signal;
> > + int owner_type;
> > + struct sigaction *sig;
> > + };
> > + #define perf_evsel_open_opts__last_field sig
> > +
> > + #define LIBPERF_OPTS(TYPE, NAME, ...)
> > +
>
> SNIP
>
> > +
> > +int perf_evsel__open_opts(struct perf_evsel *evsel, struct perf_cpu_map
> *cpus,
> > + struct perf_thread_map *threads,
> > + struct perf_evsel_open_opts *opts) {
> > + int err = 0;
> > +
> > + if (!OPTS_VALID(opts, perf_evsel_open_opts)) {
> > + err = -EINVAL;
> > + return err;
> > + }
> > +
> > + evsel->open_flags = OPTS_GET(opts, open_flags, 0);
> > +
> > + err = perf_evsel__open(evsel, cpus, threads);
> > + if (err)
> > + return err;
> > +
> > + err = perf_evsel__set_signal_handler(evsel, opts);
> > + if (err)
> > + return err;
>
> please move the signal stuff handling into separate patch together with the
> related fields in opts struct
>
I'll fix it.
Best Regards
Shunsuke
Hi jirka
> On Fri, Mar 25, 2022 at 01:38:26PM +0900, Shunsuke Nakamura wrote:
>
> SNIP
>
> > diff --git a/tools/lib/perf/evsel.c b/tools/lib/perf/evsel.c index
> > b17842581dea..db9b7274feb5 100644
> > --- a/tools/lib/perf/evsel.c
> > +++ b/tools/lib/perf/evsel.c
> > @@ -1,4 +1,7 @@
> > // SPDX-License-Identifier: GPL-2.0
> > +#ifndef _GNU_SOURCE
> > +#define _GNU_SOURCE
> > +#endif
>
> I think we can make this global set in Makefile, like we do in perf
>
I'll fix it.
Best Regards
Shunsuke