Commit 6495e762 authored by Adrian Hunter's avatar Adrian Hunter Committed by Arnaldo Carvalho de Melo
Browse files

perf dlfilter: Add attr() to perf_dlfilter_fns 



Add a function, for use by dlfilters, to return the perf_event_attr
structure.

Signed-off-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210627131818.810-10-adrian.hunter@intel.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 244afc0c

tools/perf/Documentation/perf-dlfilter.txt

+4 −1
Original line number Diff line number Diff line
@@ -126,7 +126,8 @@ struct perf_dlfilter_fns { 
	__s32 (*resolve_address)(void *ctx, __u64 address, struct perf_dlfilter_al *al);

	const __u8 *(*insn)(void *ctx, __u32 *length);

	const char *(*srcline)(void *ctx, __u32 *line_number);

	void *(*reserved[122])(void *);

	struct perf_event_attr *(*attr)(void *ctx);

	void *(*reserved[121])(void *);

};

----
@@ -143,6 +144,8 @@ before calling. Returns 0 on success, -1 otherwise. 


'srcline' return source file name and line number.



'attr' returns perf_event_attr, refer <linux/perf_event.h>.



The perf_dlfilter_al structure

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

tools/perf/util/dlfilter.c

+11 −0
Original line number Diff line number Diff line
@@ -235,6 +235,16 @@ static const char *dlfilter__srcline(void *ctx, __u32 *line_no) 
	return srcfile;

}



static struct perf_event_attr *dlfilter__attr(void *ctx)

{

	struct dlfilter *d = (struct dlfilter *)ctx;



	if (!d->ctx_valid)

		return NULL;



	return &d->evsel->core.attr;

}



static const struct perf_dlfilter_fns perf_dlfilter_fns = {

	.resolve_ip      = dlfilter__resolve_ip,

	.resolve_addr    = dlfilter__resolve_addr,
@@ -242,6 +252,7 @@ static const struct perf_dlfilter_fns perf_dlfilter_fns = { 
	.resolve_address = dlfilter__resolve_address,

	.insn            = dlfilter__insn,

	.srcline         = dlfilter__srcline,

	.attr            = dlfilter__attr,

};



static char *find_dlfilter(const char *file)

tools/perf/util/perf_dlfilter.h

+3 −1
Original line number Diff line number Diff line
@@ -101,8 +101,10 @@ struct perf_dlfilter_fns { 
	const __u8 *(*insn)(void *ctx, __u32 *length);

	/* Return source file name and line number */

	const char *(*srcline)(void *ctx, __u32 *line_number);

	/* Return perf_event_attr, refer <linux/perf_event.h> */

	struct perf_event_attr *(*attr)(void *ctx);

	/* Reserved */

	void *(*reserved[122])(void *);

	void *(*reserved[121])(void *);

};



/*