[tip:perf/core] perf thread: Make thread__find_map() search all maps
From: tip-bot for Arnaldo Carvalho de Melo
Date: Wed May 02 2018 - 13:57:43 EST
Commit-ID: 404eb5a436c4cbdc3b76896a28a3b72b7ad9294e
Gitweb: https://git.kernel.org/tip/404eb5a436c4cbdc3b76896a28a3b72b7ad9294e
Author: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
AuthorDate: Thu, 26 Apr 2018 09:34:37 -0300
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Thu, 26 Apr 2018 13:47:17 -0300
perf thread: Make thread__find_map() search all maps
We still have the split internally, but users don't see it anymore,
simplifying the growing number of cases where we end up searching
in the MAP__VARIABLE maps.
This further paves the way for ditching the split.
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Wang Nan <wangnan0@xxxxxxxxxx>
Link: https://lkml.kernel.org/n/tip-86mfxrztf310konutxvhr5ua@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/builtin-script.c | 4 ++--
tools/perf/util/event.c | 19 +++++++++++--------
tools/perf/util/thread.h | 10 ++--------
tools/perf/util/unwind-libdw.c | 10 ----------
tools/perf/util/unwind-libunwind-local.c | 12 +-----------
5 files changed, 16 insertions(+), 39 deletions(-)
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index 07cb083ac89c..fa2c7a288750 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -927,8 +927,8 @@ static int ip__fprintf_sym(uint64_t addr, struct thread *thread,
memset(&al, 0, sizeof(al));
- if (!thread__find_map(thread, cpumode, addr, &al))
- __thread__find_map(thread, cpumode, MAP__VARIABLE, addr, &al);
+ thread__find_map(thread, cpumode, addr, &al);
+
if ((*lastsym) && al.addr >= (*lastsym)->start && al.addr < (*lastsym)->end)
return 0;
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 7b67771cd478..7831c2266118 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -1488,8 +1488,8 @@ int perf_event__process(struct perf_tool *tool __maybe_unused,
return machine__process_event(machine, event, sample);
}
-struct map *__thread__find_map(struct thread *thread, u8 cpumode, enum map_type type,
- u64 addr, struct addr_location *al)
+static struct map *__thread__find_map(struct thread *thread, u8 cpumode, enum map_type type,
+ u64 addr, struct addr_location *al)
{
struct map_groups *mg = thread->mg;
struct machine *machine = mg->machine;
@@ -1565,12 +1565,18 @@ try_again:
return al->map;
}
+struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr,
+ struct addr_location *al)
+{
+ struct map *map = __thread__find_map(thread, cpumode, MAP__FUNCTION, addr, al);
+ return map ?: __thread__find_map(thread, cpumode, MAP__VARIABLE, addr, al);
+}
+
struct symbol *thread__find_symbol(struct thread *thread, u8 cpumode,
u64 addr, struct addr_location *al)
{
al->sym = NULL;
- if (__thread__find_map(thread, cpumode, MAP__FUNCTION, addr, al) ||
- __thread__find_map(thread, cpumode, MAP__VARIABLE, addr, al))
+ if (thread__find_map(thread, cpumode, addr, al))
al->sym = map__find_symbol(al->map, al->addr);
return al->sym;
}
@@ -1668,10 +1674,7 @@ bool sample_addr_correlates_sym(struct perf_event_attr *attr)
void thread__resolve(struct thread *thread, struct addr_location *al,
struct perf_sample *sample)
{
- if (!thread__find_map(thread, sample->cpumode, sample->addr, al)) {
- __thread__find_map(thread, sample->cpumode, MAP__VARIABLE,
- sample->addr, al);
- }
+ thread__find_map(thread, sample->cpumode, sample->addr, al);
al->cpu = sample->cpu;
al->sym = NULL;
diff --git a/tools/perf/util/thread.h b/tools/perf/util/thread.h
index 54aa24d6151e..07606aa6998d 100644
--- a/tools/perf/util/thread.h
+++ b/tools/perf/util/thread.h
@@ -92,14 +92,8 @@ size_t thread__fprintf(struct thread *thread, FILE *fp);
struct thread *thread__main_thread(struct machine *machine, struct thread *thread);
-struct map *__thread__find_map(struct thread *thread, u8 cpumode, enum map_type type,
- u64 addr, struct addr_location *al);
-
-static inline struct map *thread__find_map(struct thread *thread, u8 cpumode,
- u64 addr, struct addr_location *al)
-{
- return __thread__find_map(thread, cpumode, MAP__FUNCTION, addr, al);
-}
+struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr,
+ struct addr_location *al);
struct symbol *thread__find_symbol(struct thread *thread, u8 cpumode,
u64 addr, struct addr_location *al);
diff --git a/tools/perf/util/unwind-libdw.c b/tools/perf/util/unwind-libdw.c
index 17401922cd42..538db4e5d1e6 100644
--- a/tools/perf/util/unwind-libdw.c
+++ b/tools/perf/util/unwind-libdw.c
@@ -105,16 +105,6 @@ static int access_dso_mem(struct unwind_info *ui, Dwarf_Addr addr,
ssize_t size;
if (!thread__find_map(ui->thread, PERF_RECORD_MISC_USER, addr, &al)) {
- /*
- * We've seen cases (softice) where DWARF unwinder went
- * through non executable mmaps, which we need to lookup
- * in MAP__VARIABLE tree.
- */
- __thread__find_map(ui->thread, PERF_RECORD_MISC_USER,
- MAP__VARIABLE, addr, &al);
- }
-
- if (!al.map) {
pr_debug("unwind: no map for %lx\n", (unsigned long)addr);
return -1;
}
diff --git a/tools/perf/util/unwind-libunwind-local.c b/tools/perf/util/unwind-libunwind-local.c
index 2afb22b0a1a9..6a11bc7e6b27 100644
--- a/tools/perf/util/unwind-libunwind-local.c
+++ b/tools/perf/util/unwind-libunwind-local.c
@@ -366,17 +366,7 @@ static int read_unwind_spec_debug_frame(struct dso *dso,
static struct map *find_map(unw_word_t ip, struct unwind_info *ui)
{
struct addr_location al;
-
- if (!thread__find_map(ui->thread, PERF_RECORD_MISC_USER, ip, &al)) {
- /*
- * We've seen cases (softice) where DWARF unwinder went
- * through non executable mmaps, which we need to lookup
- * in MAP__VARIABLE tree.
- */
- __thread__find_map(ui->thread, PERF_RECORD_MISC_USER,
- MAP__VARIABLE, ip, &al);
- }
- return al.map;
+ return thread__find_map(ui->thread, PERF_RECORD_MISC_USER, ip, &al);
}
static int