[PATCH V2 08/10] perf dlfilter: Add srcline() to perf_dlfilter_fns
From: Adrian Hunter <adrian.hunter@intel.com>
Date: 2021-06-27 13:18:30
Also in:
lkml
Subsystem:
performance events subsystem, the rest · Maintainers:
Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo, Namhyung Kim, Linus Torvalds
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> --- tools/perf/Documentation/perf-dlfilter.txt | 5 +++- tools/perf/util/dlfilter.c | 28 ++++++++++++++++++++++ tools/perf/util/perf_dlfilter.h | 4 +++- 3 files changed, 35 insertions(+), 2 deletions(-)
diff --git a/tools/perf/Documentation/perf-dlfilter.txt b/tools/perf/Documentation/perf-dlfilter.txt
index bc4dba0995d8..df118ddcd7f4 100644
--- 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 79a899255c01..f4ce1a80bddc 100644
--- 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 763c5af3c5f7..b989918056e2 100644
--- 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 *); }; /*
--
2.17.1