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perf dlfilter: Add srcline() to perf_dlfilter_fns

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

Signed-off-by: Adrian 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: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2021-06-27 16:18:16 +03:00 committed by Arnaldo Carvalho de Melo
parent e35995effd
commit 244afc0c93
3 changed files with 35 additions and 2 deletions
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5
tools/perf/Documentation/perf-dlfilter.txt
View File

@ -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
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

28
tools/perf/util/dlfilter.c
View File

@ -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)

4
tools/perf/util/perf_dlfilter.h
View File

@ -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 *);
};
/*