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-rw-r--r--tools/perf/util/machine.c121
1 files changed, 91 insertions, 30 deletions
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 9b33bef54581..2e9eb6aa3ce2 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -1,3 +1,7 @@
+#include <dirent.h>
+#include <errno.h>
+#include <inttypes.h>
+#include <regex.h>
#include "callchain.h"
#include "debug.h"
#include "event.h"
@@ -10,9 +14,15 @@
#include "thread.h"
#include "vdso.h"
#include <stdbool.h>
-#include <symbol/kallsyms.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
#include "unwind.h"
#include "linux/hash.h"
+#include "asm/bug.h"
+
+#include "sane_ctype.h"
+#include <symbol/kallsyms.h>
static void __machine__remove_thread(struct machine *machine, struct thread *th, bool lock);
@@ -87,6 +97,25 @@ out_delete:
return NULL;
}
+struct machine *machine__new_kallsyms(void)
+{
+ struct machine *machine = machine__new_host();
+ /*
+ * FIXME:
+ * 1) MAP__FUNCTION will go away when we stop loading separate maps for
+ * functions and data objects.
+ * 2) We should switch to machine__load_kallsyms(), i.e. not explicitely
+ * ask for not using the kcore parsing code, once this one is fixed
+ * to create a map per module.
+ */
+ if (machine && __machine__load_kallsyms(machine, "/proc/kallsyms", MAP__FUNCTION, true) <= 0) {
+ machine__delete(machine);
+ machine = NULL;
+ }
+
+ return machine;
+}
+
static void dsos__purge(struct dsos *dsos)
{
struct dso *pos, *n;
@@ -482,6 +511,37 @@ int machine__process_comm_event(struct machine *machine, union perf_event *event
return err;
}
+int machine__process_namespaces_event(struct machine *machine __maybe_unused,
+ union perf_event *event,
+ struct perf_sample *sample __maybe_unused)
+{
+ struct thread *thread = machine__findnew_thread(machine,
+ event->namespaces.pid,
+ event->namespaces.tid);
+ int err = 0;
+
+ WARN_ONCE(event->namespaces.nr_namespaces > NR_NAMESPACES,
+ "\nWARNING: kernel seems to support more namespaces than perf"
+ " tool.\nTry updating the perf tool..\n\n");
+
+ WARN_ONCE(event->namespaces.nr_namespaces < NR_NAMESPACES,
+ "\nWARNING: perf tool seems to support more namespaces than"
+ " the kernel.\nTry updating the kernel..\n\n");
+
+ if (dump_trace)
+ perf_event__fprintf_namespaces(event, stdout);
+
+ if (thread == NULL ||
+ thread__set_namespaces(thread, sample->time, &event->namespaces)) {
+ dump_printf("problem processing PERF_RECORD_NAMESPACES, skipping event.\n");
+ err = -1;
+ }
+
+ thread__put(thread);
+
+ return err;
+}
+
int machine__process_lost_event(struct machine *machine __maybe_unused,
union perf_event *event, struct perf_sample *sample __maybe_unused)
{
@@ -512,16 +572,7 @@ static struct dso *machine__findnew_module_dso(struct machine *machine,
if (dso == NULL)
goto out_unlock;
- if (machine__is_host(machine))
- dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE;
- else
- dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE;
-
- /* _KMODULE_COMP should be next to _KMODULE */
- if (m->kmod && m->comp)
- dso->symtab_type++;
-
- dso__set_short_name(dso, strdup(m->name), true);
+ dso__set_module_info(dso, m, machine);
dso__set_long_name(dso, strdup(filename), true);
}
@@ -736,11 +787,11 @@ const char *ref_reloc_sym_names[] = {"_text", "_stext", NULL};
* Returns the name of the start symbol in *symbol_name. Pass in NULL as
* symbol_name if it's not that important.
*/
-static u64 machine__get_running_kernel_start(struct machine *machine,
- const char **symbol_name)
+static int machine__get_running_kernel_start(struct machine *machine,
+ const char **symbol_name, u64 *start)
{
char filename[PATH_MAX];
- int i;
+ int i, err = -1;
const char *name;
u64 addr = 0;
@@ -750,21 +801,28 @@ static u64 machine__get_running_kernel_start(struct machine *machine,
return 0;
for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) {
- addr = kallsyms__get_function_start(filename, name);
- if (addr)
+ err = kallsyms__get_function_start(filename, name, &addr);
+ if (!err)
break;
}
+ if (err)
+ return -1;
+
if (symbol_name)
*symbol_name = name;
- return addr;
+ *start = addr;
+ return 0;
}
int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel)
{
- enum map_type type;
- u64 start = machine__get_running_kernel_start(machine, NULL);
+ int type;
+ u64 start = 0;
+
+ if (machine__get_running_kernel_start(machine, NULL, &start))
+ return -1;
/* In case of renewal the kernel map, destroy previous one */
machine__destroy_kernel_maps(machine);
@@ -794,7 +852,7 @@ int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel)
void machine__destroy_kernel_maps(struct machine *machine)
{
- enum map_type type;
+ int type;
for (type = 0; type < MAP__NR_TYPES; ++type) {
struct kmap *kmap;
@@ -1125,8 +1183,8 @@ static int machine__create_modules(struct machine *machine)
int machine__create_kernel_maps(struct machine *machine)
{
struct dso *kernel = machine__get_kernel(machine);
- const char *name;
- u64 addr;
+ const char *name = NULL;
+ u64 addr = 0;
int ret;
if (kernel == NULL)
@@ -1151,11 +1209,12 @@ int machine__create_kernel_maps(struct machine *machine)
*/
map_groups__fixup_end(&machine->kmaps);
- addr = machine__get_running_kernel_start(machine, &name);
- if (!addr) {
- } else if (maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, name, addr)) {
- machine__destroy_kernel_maps(machine);
- return -1;
+ if (!machine__get_running_kernel_start(machine, &name, &addr)) {
+ if (name &&
+ maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, name, addr)) {
+ machine__destroy_kernel_maps(machine);
+ return -1;
+ }
}
return 0;
@@ -1420,7 +1479,7 @@ static void __machine__remove_thread(struct machine *machine, struct thread *th,
if (machine->last_match == th)
machine->last_match = NULL;
- BUG_ON(atomic_read(&th->refcnt) == 0);
+ BUG_ON(refcount_read(&th->refcnt) == 0);
if (lock)
pthread_rwlock_wrlock(&machine->threads_lock);
rb_erase_init(&th->rb_node, &machine->threads);
@@ -1519,6 +1578,8 @@ int machine__process_event(struct machine *machine, union perf_event *event,
ret = machine__process_comm_event(machine, event, sample); break;
case PERF_RECORD_MMAP:
ret = machine__process_mmap_event(machine, event, sample); break;
+ case PERF_RECORD_NAMESPACES:
+ ret = machine__process_namespaces_event(machine, event, sample); break;
case PERF_RECORD_MMAP2:
ret = machine__process_mmap2_event(machine, event, sample); break;
case PERF_RECORD_FORK:
@@ -1546,7 +1607,7 @@ int machine__process_event(struct machine *machine, union perf_event *event,
static bool symbol__match_regex(struct symbol *sym, regex_t *regex)
{
- if (sym->name && !regexec(regex, sym->name, 0, NULL, 0))
+ if (!regexec(regex, sym->name, 0, NULL, 0))
return 1;
return 0;
}
@@ -2148,7 +2209,7 @@ int machine__get_kernel_start(struct machine *machine)
machine->kernel_start = 1ULL << 63;
if (map) {
err = map__load(map);
- if (map->start)
+ if (!err)
machine->kernel_start = map->start;
}
return err;
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