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Subject[PATCH 22/48] perf tools: Introduce thread__find_symbol_by_time() and friends
Date
From: Namhyung Kim <namhyung@kernel.org>

These new functions are for find appropriate map (and symbol) at the
given time when used with an indexed data file. This is based on the
fact that map_groups list is sorted by time in the previous patch.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/n/tip-dg807z4umbjfq0yk2e3vixaj@git.kernel.org
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/util/event.c | 52 ++++++++++++++++++++++++++++++++++-----
tools/perf/util/machine.c | 20 +++++++++------
tools/perf/util/thread.c | 25 +++++++++++++++++++
tools/perf/util/thread.h | 9 +++++++
4 files changed, 92 insertions(+), 14 deletions(-)

diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 29438cda8aa2..74d20056b860 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -1516,15 +1516,14 @@ 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, u64 addr,
- struct addr_location *al)
+static
+struct map *map_groups__find_map(struct map_groups *mg, u8 cpumode,
+ u64 addr, struct addr_location *al)
{
- struct map_groups *mg = thread->mg;
struct machine *machine = mg->machine;
bool load_map = false;

al->machine = machine;
- al->thread = thread;
al->addr = addr;
al->cpumode = cpumode;
al->filtered = 0;
@@ -1595,6 +1594,28 @@ struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr,
return al->map;
}

+struct map *thread__find_map(struct thread *thread, u8 cpumode,
+ u64 addr, struct addr_location *al)
+{
+ al->thread = thread;
+ return map_groups__find_map(thread->mg, cpumode, addr, al);
+}
+
+struct map *thread__find_map_by_time(struct thread *thread, u8 cpumode,
+ u64 addr, struct addr_location *al,
+ u64 timestamp)
+{
+ struct map_groups *mg;
+
+ if (perf_has_index)
+ mg = thread__get_map_groups(thread, timestamp);
+ else
+ mg = thread->mg;
+
+ al->thread = thread;
+ return map_groups__find_map(mg, cpumode, addr, al);
+}
+
struct symbol *thread__find_symbol(struct thread *thread, u8 cpumode,
u64 addr, struct addr_location *al)
{
@@ -1604,6 +1625,22 @@ struct symbol *thread__find_symbol(struct thread *thread, u8 cpumode,
return al->sym;
}

+struct symbol *thread__find_symbol_by_time(struct thread *thread, u8 cpumode,
+ u64 addr, struct addr_location *al,
+ u64 timestamp)
+{
+ if (perf_has_index)
+ thread__find_map_by_time(thread, cpumode, addr, al, timestamp);
+ else
+ thread__find_map(thread, cpumode, addr, al);
+
+ if (al->map != NULL)
+ al->sym = map__find_symbol(al->map, al->addr);
+ else
+ al->sym = NULL;
+ return al->sym;
+}
+
/*
* Callers need to drop the reference to al->thread, obtained in
* machine__findnew_thread()
@@ -1619,7 +1656,9 @@ int machine__resolve(struct machine *machine, struct addr_location *al,
return -1;

dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
- thread__find_map(thread, sample->cpumode, sample->ip, al);
+ thread__find_map_by_time(thread, sample->cpumode,
+ sample->ip, al, sample->time);
+
dump_printf(" ...... dso: %s\n",
al->map ? al->map->dso->long_name :
al->level == 'H' ? "[hypervisor]" : "<not found>");
@@ -1698,7 +1737,8 @@ bool sample_addr_correlates_sym(struct perf_event_attr *attr)
void thread__resolve(struct thread *thread, struct addr_location *al,
struct perf_sample *sample)
{
- thread__find_map(thread, sample->cpumode, sample->addr, al);
+ thread__find_map_by_time(thread, sample->cpumode, sample->addr,
+ al, sample->time);

al->cpu = sample->cpu;
al->sym = NULL;
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index e2ebe471cdbc..0c576a01697e 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -2011,7 +2011,7 @@ static bool symbol__match_regex(struct symbol *sym, regex_t *regex)

static void ip__resolve_ams(struct thread *thread,
struct addr_map_symbol *ams,
- u64 ip)
+ u64 ip, u64 timestamp)
{
struct addr_location al;

@@ -2023,7 +2023,8 @@ static void ip__resolve_ams(struct thread *thread,
* Thus, we have to try consecutively until we find a match
* or else, the symbol is unknown
*/
- thread__find_cpumode_addr_location(thread, ip, &al);
+ thread__find_cpumode_addr_location_by_time(thread, ip,
+ &al, timestamp);

ams->addr = ip;
ams->al_addr = al.addr;
@@ -2034,13 +2035,14 @@ static void ip__resolve_ams(struct thread *thread,

static void ip__resolve_data(struct thread *thread,
u8 m, struct addr_map_symbol *ams,
- u64 addr, u64 phys_addr)
+ u64 addr, u64 phys_addr, u64 timestamp)
{
struct addr_location al;

memset(&al, 0, sizeof(al));

- thread__find_symbol(thread, m, addr, &al);
+ thread__find_symbol_by_time(thread, m, addr,
+ &al, timestamp);

ams->addr = addr;
ams->al_addr = al.addr;
@@ -2057,9 +2059,9 @@ struct mem_info *sample__resolve_mem(struct perf_sample *sample,
if (!mi)
return NULL;

- ip__resolve_ams(al->thread, &mi->iaddr, sample->ip);
+ ip__resolve_ams(al->thread, &mi->iaddr, sample->ip, sample->time);
ip__resolve_data(al->thread, al->cpumode, &mi->daddr,
- sample->addr, sample->phys_addr);
+ sample->addr, sample->phys_addr, sample->time);
mi->data_src.val = sample->data_src;

return mi;
@@ -2175,8 +2177,10 @@ struct branch_info *sample__resolve_bstack(struct perf_sample *sample,
return NULL;

for (i = 0; i < bs->nr; i++) {
- ip__resolve_ams(al->thread, &bi[i].to, bs->entries[i].to);
- ip__resolve_ams(al->thread, &bi[i].from, bs->entries[i].from);
+ ip__resolve_ams(al->thread, &bi[i].to,
+ bs->entries[i].to, sample->time);
+ ip__resolve_ams(al->thread, &bi[i].from,
+ bs->entries[i].from, sample->time);
bi[i].flags = bs->entries[i].flags;
}
return bi;
diff --git a/tools/perf/util/thread.c b/tools/perf/util/thread.c
index fbda4b6d2ec5..8a0b27202ab7 100644
--- a/tools/perf/util/thread.c
+++ b/tools/perf/util/thread.c
@@ -550,3 +550,28 @@ struct thread *thread__main_thread(struct machine *machine, struct thread *threa

return machine__find_thread(machine, thread->pid_, thread->pid_);
}
+
+void thread__find_cpumode_addr_location_by_time(struct thread *thread,
+ u64 addr, struct addr_location *al,
+ u64 timestamp)
+{
+ size_t i;
+ const u8 cpumodes[] = {
+ PERF_RECORD_MISC_USER,
+ PERF_RECORD_MISC_KERNEL,
+ PERF_RECORD_MISC_GUEST_USER,
+ PERF_RECORD_MISC_GUEST_KERNEL
+ };
+
+ if (!perf_has_index) {
+ thread__find_cpumode_addr_location(thread, addr, al);
+ return;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(cpumodes); i++) {
+ thread__find_symbol_by_time(thread, cpumodes[i],
+ addr, al, timestamp);
+ if (al->map)
+ break;
+ }
+}
diff --git a/tools/perf/util/thread.h b/tools/perf/util/thread.h
index e7eaf32a0cf1..86186a0773a0 100644
--- a/tools/perf/util/thread.h
+++ b/tools/perf/util/thread.h
@@ -99,12 +99,21 @@ struct thread *thread__main_thread(struct machine *machine, struct thread *threa

struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr,
struct addr_location *al);
+struct map *thread__find_map_by_time(struct thread *thread, u8 cpumode,
+ u64 addr, struct addr_location *al,
+ u64 timestamp);

struct symbol *thread__find_symbol(struct thread *thread, u8 cpumode,
u64 addr, struct addr_location *al);
+struct symbol *thread__find_symbol_by_time(struct thread *thread, u8 cpumode,
+ u64 addr, struct addr_location *al,
+ u64 timestamp);

void thread__find_cpumode_addr_location(struct thread *thread, u64 addr,
struct addr_location *al);
+void thread__find_cpumode_addr_location_by_time(struct thread *thread,
+ u64 addr, struct addr_location *al,
+ u64 timestamp);

static inline void *thread__priv(struct thread *thread)
{
--
2.17.1
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