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: 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>

diff --git a/tools/perf/Documentation/perf-dlfilter.txt b/tools/perf/Documentation/perf-dlfilter.txt
index bc4dba0..df118dd 100644 (file)
--- a/tools/perf/Documentation/perf-dlfilter.txt
+++ b/tools/perf/Documentation/perf-dlfilter.txt
@@ -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
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 

diff --git a/tools/perf/util/dlfilter.c b/tools/perf/util/dlfilter.c
index 79a8992..f4ce1a8 100644 (file)
--- a/tools/perf/util/dlfilter.c
+++ b/tools/perf/util/dlfilter.c
@@ -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)

diff --git a/tools/perf/util/perf_dlfilter.h b/tools/perf/util/perf_dlfilter.h
index 763c5af..b989918 100644 (file)
--- a/tools/perf/util/perf_dlfilter.h
+++ b/tools/perf/util/perf_dlfilter.h
@@ -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 *);
 };
 
 /*