Commit 244afc0c authored by Adrian Hunter's avatar Adrian Hunter Committed by Arnaldo Carvalho de Melo
Browse files

perf dlfilter: Add srcline() to perf_dlfilter_fns 



Add a function, for use by dlfilters, to return source code file name and
line number.

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/20210627131818.810-9-adrian.hunter@intel.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent e35995ef

tools/perf/Documentation/perf-dlfilter.txt

+4 −1
Original line number Diff line number Diff line
@@ -125,7 +125,8 @@ struct perf_dlfilter_fns { 
	char **(*args)(void *ctx, int *dlargc);

	__s32 (*resolve_address)(void *ctx, __u64 address, struct perf_dlfilter_al *al);

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

	void *(*reserved[123])(void *);

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

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

};

----
@@ -140,6 +141,8 @@ before calling. Returns 0 on success, -1 otherwise. 


'insn' returns instruction bytes and length.



'srcline' return source file name and line number.



The perf_dlfilter_al structure

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

tools/perf/util/dlfilter.c

+28 −0
Original line number Diff line number Diff line
@@ -19,6 +19,7 @@ 
#include "thread.h"

#include "trace-event.h"

#include "symbol.h"

#include "srcline.h"

#include "dlfilter.h"

#include "perf_dlfilter.h"
@@ -208,12 +209,39 @@ static const __u8 *dlfilter__insn(void *ctx, __u32 *len) 
	return (__u8 *)d->sample->insn;

}



static const char *dlfilter__srcline(void *ctx, __u32 *line_no)

{

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

	struct addr_location *al;

	unsigned int line = 0;

	char *srcfile = NULL;

	struct map *map;

	u64 addr;



	if (!d->ctx_valid || !line_no)

		return NULL;



	al = get_al(d);

	if (!al)

		return NULL;



	map = al->map;

	addr = al->addr;



	if (map && map->dso)

		srcfile = get_srcline_split(map->dso, map__rip_2objdump(map, addr), &line);



	*line_no = line;

	return srcfile;

}



static const struct perf_dlfilter_fns perf_dlfilter_fns = {

	.resolve_ip      = dlfilter__resolve_ip,

	.resolve_addr    = dlfilter__resolve_addr,

	.args            = dlfilter__args,

	.resolve_address = dlfilter__resolve_address,

	.insn            = dlfilter__insn,

	.srcline         = dlfilter__srcline,

};



static char *find_dlfilter(const char *file)

tools/perf/util/perf_dlfilter.h

+3 −1
Original line number Diff line number Diff line
@@ -99,8 +99,10 @@ struct perf_dlfilter_fns { 
	__s32 (*resolve_address)(void *ctx, __u64 address, struct perf_dlfilter_al *al);

	/* Return instruction bytes and length */

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

	/* Return source file name and line number */

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

	/* Reserved */

	void *(*reserved[123])(void *);

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

};



/*