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-rw-r--r--tools/perf/util/machine.c155
1 files changed, 108 insertions, 47 deletions
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index b2ecad6ec46b..1dca61f0512d 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -25,12 +25,15 @@ int machine__init(struct machine *machine, const char *root_dir, pid_t pid)
machine->kmaps.machine = machine;
machine->pid = pid;
+ machine->symbol_filter = NULL;
+
machine->root_dir = strdup(root_dir);
if (machine->root_dir == NULL)
return -ENOMEM;
if (pid != HOST_KERNEL_ID) {
- struct thread *thread = machine__findnew_thread(machine, pid);
+ struct thread *thread = machine__findnew_thread(machine, 0,
+ pid);
char comm[64];
if (thread == NULL)
@@ -95,6 +98,7 @@ void machines__init(struct machines *machines)
{
machine__init(&machines->host, "", HOST_KERNEL_ID);
machines->guests = RB_ROOT;
+ machines->symbol_filter = NULL;
}
void machines__exit(struct machines *machines)
@@ -118,6 +122,8 @@ struct machine *machines__add(struct machines *machines, pid_t pid,
return NULL;
}
+ machine->symbol_filter = machines->symbol_filter;
+
while (*p != NULL) {
parent = *p;
pos = rb_entry(parent, struct machine, rb_node);
@@ -133,6 +139,21 @@ struct machine *machines__add(struct machines *machines, pid_t pid,
return machine;
}
+void machines__set_symbol_filter(struct machines *machines,
+ symbol_filter_t symbol_filter)
+{
+ struct rb_node *nd;
+
+ machines->symbol_filter = symbol_filter;
+ machines->host.symbol_filter = symbol_filter;
+
+ for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
+ struct machine *machine = rb_entry(nd, struct machine, rb_node);
+
+ machine->symbol_filter = symbol_filter;
+ }
+}
+
struct machine *machines__find(struct machines *machines, pid_t pid)
{
struct rb_node **p = &machines->guests.rb_node;
@@ -233,7 +254,8 @@ void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size)
return;
}
-static struct thread *__machine__findnew_thread(struct machine *machine, pid_t pid,
+static struct thread *__machine__findnew_thread(struct machine *machine,
+ pid_t pid, pid_t tid,
bool create)
{
struct rb_node **p = &machine->threads.rb_node;
@@ -241,23 +263,28 @@ static struct thread *__machine__findnew_thread(struct machine *machine, pid_t p
struct thread *th;
/*
- * Font-end cache - PID lookups come in blocks,
+ * Front-end cache - TID lookups come in blocks,
* so most of the time we dont have to look up
* the full rbtree:
*/
- if (machine->last_match && machine->last_match->pid == pid)
+ if (machine->last_match && machine->last_match->tid == tid) {
+ if (pid && pid != machine->last_match->pid_)
+ machine->last_match->pid_ = pid;
return machine->last_match;
+ }
while (*p != NULL) {
parent = *p;
th = rb_entry(parent, struct thread, rb_node);
- if (th->pid == pid) {
+ if (th->tid == tid) {
machine->last_match = th;
+ if (pid && pid != th->pid_)
+ th->pid_ = pid;
return th;
}
- if (pid < th->pid)
+ if (tid < th->tid)
p = &(*p)->rb_left;
else
p = &(*p)->rb_right;
@@ -266,7 +293,7 @@ static struct thread *__machine__findnew_thread(struct machine *machine, pid_t p
if (!create)
return NULL;
- th = thread__new(pid);
+ th = thread__new(pid, tid);
if (th != NULL) {
rb_link_node(&th->rb_node, parent, p);
rb_insert_color(&th->rb_node, &machine->threads);
@@ -276,19 +303,22 @@ static struct thread *__machine__findnew_thread(struct machine *machine, pid_t p
return th;
}
-struct thread *machine__findnew_thread(struct machine *machine, pid_t pid)
+struct thread *machine__findnew_thread(struct machine *machine, pid_t pid,
+ pid_t tid)
{
- return __machine__findnew_thread(machine, pid, true);
+ return __machine__findnew_thread(machine, pid, tid, true);
}
-struct thread *machine__find_thread(struct machine *machine, pid_t pid)
+struct thread *machine__find_thread(struct machine *machine, pid_t tid)
{
- return __machine__findnew_thread(machine, pid, false);
+ return __machine__findnew_thread(machine, 0, tid, false);
}
int machine__process_comm_event(struct machine *machine, union perf_event *event)
{
- struct thread *thread = machine__findnew_thread(machine, event->comm.tid);
+ struct thread *thread = machine__findnew_thread(machine,
+ event->comm.pid,
+ event->comm.tid);
if (dump_trace)
perf_event__fprintf_comm(event, stdout);
@@ -628,10 +658,8 @@ int machine__load_vmlinux_path(struct machine *machine, enum map_type type,
struct map *map = machine->vmlinux_maps[type];
int ret = dso__load_vmlinux_path(map->dso, map, filter);
- if (ret > 0) {
+ if (ret > 0)
dso__set_loaded(map->dso, type);
- map__reloc_vmlinux(map);
- }
return ret;
}
@@ -808,7 +836,10 @@ static int machine__create_modules(struct machine *machine)
free(line);
fclose(file);
- return machine__set_modules_path(machine);
+ if (machine__set_modules_path(machine) < 0) {
+ pr_debug("Problems setting modules path maps, continuing anyway...\n");
+ }
+ return 0;
out_delete_line:
free(line);
@@ -858,6 +889,18 @@ static void machine__set_kernel_mmap_len(struct machine *machine,
}
}
+static bool machine__uses_kcore(struct machine *machine)
+{
+ struct dso *dso;
+
+ list_for_each_entry(dso, &machine->kernel_dsos, node) {
+ if (dso__is_kcore(dso))
+ return true;
+ }
+
+ return false;
+}
+
static int machine__process_kernel_mmap_event(struct machine *machine,
union perf_event *event)
{
@@ -866,6 +909,10 @@ static int machine__process_kernel_mmap_event(struct machine *machine,
enum dso_kernel_type kernel_type;
bool is_kernel_mmap;
+ /* If we have maps from kcore then we do not need or want any others */
+ if (machine__uses_kcore(machine))
+ return 0;
+
machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix));
if (machine__is_host(machine))
kernel_type = DSO_TYPE_KERNEL;
@@ -969,7 +1016,8 @@ int machine__process_mmap_event(struct machine *machine, union perf_event *event
return 0;
}
- thread = machine__findnew_thread(machine, event->mmap.pid);
+ thread = machine__findnew_thread(machine, event->mmap.pid,
+ event->mmap.pid);
if (thread == NULL)
goto out_problem;
@@ -994,11 +1042,30 @@ out_problem:
return 0;
}
+static void machine__remove_thread(struct machine *machine, struct thread *th)
+{
+ machine->last_match = NULL;
+ rb_erase(&th->rb_node, &machine->threads);
+ /*
+ * We may have references to this thread, for instance in some hist_entry
+ * instances, so just move them to a separate list.
+ */
+ list_add_tail(&th->node, &machine->dead_threads);
+}
+
int machine__process_fork_event(struct machine *machine, union perf_event *event)
{
- struct thread *thread = machine__findnew_thread(machine, event->fork.tid);
- struct thread *parent = machine__findnew_thread(machine, event->fork.ptid);
+ struct thread *thread = machine__find_thread(machine, event->fork.tid);
+ struct thread *parent = machine__findnew_thread(machine,
+ event->fork.ppid,
+ event->fork.ptid);
+ /* if a thread currently exists for the thread id remove it */
+ if (thread != NULL)
+ machine__remove_thread(machine, thread);
+
+ thread = machine__findnew_thread(machine, event->fork.pid,
+ event->fork.tid);
if (dump_trace)
perf_event__fprintf_task(event, stdout);
@@ -1011,18 +1078,8 @@ int machine__process_fork_event(struct machine *machine, union perf_event *event
return 0;
}
-static void machine__remove_thread(struct machine *machine, struct thread *th)
-{
- machine->last_match = NULL;
- rb_erase(&th->rb_node, &machine->threads);
- /*
- * We may have references to this thread, for instance in some hist_entry
- * instances, so just move them to a separate list.
- */
- list_add_tail(&th->node, &machine->dead_threads);
-}
-
-int machine__process_exit_event(struct machine *machine, union perf_event *event)
+int machine__process_exit_event(struct machine *machine __maybe_unused,
+ union perf_event *event)
{
struct thread *thread = machine__find_thread(machine, event->fork.tid);
@@ -1030,7 +1087,7 @@ int machine__process_exit_event(struct machine *machine, union perf_event *event
perf_event__fprintf_task(event, stdout);
if (thread != NULL)
- machine__remove_thread(machine, thread);
+ thread__exited(thread);
return 0;
}
@@ -1058,11 +1115,10 @@ int machine__process_event(struct machine *machine, union perf_event *event)
return ret;
}
-static bool symbol__match_parent_regex(struct symbol *sym)
+static bool symbol__match_regex(struct symbol *sym, regex_t *regex)
{
- if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0))
+ if (sym->name && !regexec(regex, sym->name, 0, NULL, 0))
return 1;
-
return 0;
}
@@ -1094,7 +1150,7 @@ static void ip__resolve_ams(struct machine *machine, struct thread *thread,
* or else, the symbol is unknown
*/
thread__find_addr_location(thread, machine, m, MAP__FUNCTION,
- ip, &al, NULL);
+ ip, &al);
if (al.sym)
goto found;
}
@@ -1112,8 +1168,8 @@ static void ip__resolve_data(struct machine *machine, struct thread *thread,
memset(&al, 0, sizeof(al));
- thread__find_addr_location(thread, machine, m, MAP__VARIABLE, addr, &al,
- NULL);
+ thread__find_addr_location(thread, machine, m, MAP__VARIABLE, addr,
+ &al);
ams->addr = addr;
ams->al_addr = al.addr;
ams->sym = al.sym;
@@ -1159,8 +1215,8 @@ struct branch_info *machine__resolve_bstack(struct machine *machine,
static int machine__resolve_callchain_sample(struct machine *machine,
struct thread *thread,
struct ip_callchain *chain,
- struct symbol **parent)
-
+ struct symbol **parent,
+ struct addr_location *root_al)
{
u8 cpumode = PERF_RECORD_MISC_USER;
unsigned int i;
@@ -1208,11 +1264,18 @@ static int machine__resolve_callchain_sample(struct machine *machine,
al.filtered = false;
thread__find_addr_location(thread, machine, cpumode,
- MAP__FUNCTION, ip, &al, NULL);
+ MAP__FUNCTION, ip, &al);
if (al.sym != NULL) {
if (sort__has_parent && !*parent &&
- symbol__match_parent_regex(al.sym))
+ symbol__match_regex(al.sym, &parent_regex))
*parent = al.sym;
+ else if (have_ignore_callees && root_al &&
+ symbol__match_regex(al.sym, &ignore_callees_regex)) {
+ /* Treat this symbol as the root,
+ forgetting its callees. */
+ *root_al = al;
+ callchain_cursor_reset(&callchain_cursor);
+ }
if (!symbol_conf.use_callchain)
break;
}
@@ -1237,15 +1300,13 @@ int machine__resolve_callchain(struct machine *machine,
struct perf_evsel *evsel,
struct thread *thread,
struct perf_sample *sample,
- struct symbol **parent)
-
+ struct symbol **parent,
+ struct addr_location *root_al)
{
int ret;
- callchain_cursor_reset(&callchain_cursor);
-
ret = machine__resolve_callchain_sample(machine, thread,
- sample->callchain, parent);
+ sample->callchain, parent, root_al);
if (ret)
return ret;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.