perf machine: Carve up event processing specific from perf_tool
The perf_tool vtable expects methods that receive perf_tool and
perf_sample entries, but for tools not interested in doing any special
processing on non PERF_RECORD_SAMPLE events, like 'perf top', and for
those not using perf_session, like 'perf trace', they were using
perf_event__process passing tool and sample paramenters that were just
not used.
Provide 'machine' methods for this purpose and make the perf_event
ones use them.
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-ot9cc6mt025o8kbngzckcrx9@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 9d36d7e..502eec0 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -1,3 +1,5 @@
+#include "debug.h"
+#include "event.h"
#include "machine.h"
#include "map.h"
#include "thread.h"
@@ -55,3 +57,221 @@
{
return __machine__findnew_thread(machine, pid, false);
}
+
+int machine__process_comm_event(struct machine *machine, union perf_event *event)
+{
+ struct thread *thread = machine__findnew_thread(machine, event->comm.tid);
+
+ if (dump_trace)
+ perf_event__fprintf_comm(event, stdout);
+
+ if (thread == NULL || thread__set_comm(thread, event->comm.comm)) {
+ dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+int machine__process_lost_event(struct machine *machine __maybe_unused,
+ union perf_event *event)
+{
+ dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n",
+ event->lost.id, event->lost.lost);
+ return 0;
+}
+
+static void machine__set_kernel_mmap_len(struct machine *machine,
+ union perf_event *event)
+{
+ machine->vmlinux_maps[MAP__FUNCTION]->start = event->mmap.start;
+ machine->vmlinux_maps[MAP__FUNCTION]->end = (event->mmap.start +
+ event->mmap.len);
+ /*
+ * Be a bit paranoid here, some perf.data file came with
+ * a zero sized synthesized MMAP event for the kernel.
+ */
+ if (machine->vmlinux_maps[MAP__FUNCTION]->end == 0)
+ machine->vmlinux_maps[MAP__FUNCTION]->end = ~0ULL;
+}
+
+static int machine__process_kernel_mmap_event(struct machine *machine,
+ union perf_event *event)
+{
+ struct map *map;
+ char kmmap_prefix[PATH_MAX];
+ enum dso_kernel_type kernel_type;
+ bool is_kernel_mmap;
+
+ machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix));
+ if (machine__is_host(machine))
+ kernel_type = DSO_TYPE_KERNEL;
+ else
+ kernel_type = DSO_TYPE_GUEST_KERNEL;
+
+ is_kernel_mmap = memcmp(event->mmap.filename,
+ kmmap_prefix,
+ strlen(kmmap_prefix) - 1) == 0;
+ if (event->mmap.filename[0] == '/' ||
+ (!is_kernel_mmap && event->mmap.filename[0] == '[')) {
+
+ char short_module_name[1024];
+ char *name, *dot;
+
+ if (event->mmap.filename[0] == '/') {
+ name = strrchr(event->mmap.filename, '/');
+ if (name == NULL)
+ goto out_problem;
+
+ ++name; /* skip / */
+ dot = strrchr(name, '.');
+ if (dot == NULL)
+ goto out_problem;
+ snprintf(short_module_name, sizeof(short_module_name),
+ "[%.*s]", (int)(dot - name), name);
+ strxfrchar(short_module_name, '-', '_');
+ } else
+ strcpy(short_module_name, event->mmap.filename);
+
+ map = machine__new_module(machine, event->mmap.start,
+ event->mmap.filename);
+ if (map == NULL)
+ goto out_problem;
+
+ name = strdup(short_module_name);
+ if (name == NULL)
+ goto out_problem;
+
+ map->dso->short_name = name;
+ map->dso->sname_alloc = 1;
+ map->end = map->start + event->mmap.len;
+ } else if (is_kernel_mmap) {
+ const char *symbol_name = (event->mmap.filename +
+ strlen(kmmap_prefix));
+ /*
+ * Should be there already, from the build-id table in
+ * the header.
+ */
+ struct dso *kernel = __dsos__findnew(&machine->kernel_dsos,
+ kmmap_prefix);
+ if (kernel == NULL)
+ goto out_problem;
+
+ kernel->kernel = kernel_type;
+ if (__machine__create_kernel_maps(machine, kernel) < 0)
+ goto out_problem;
+
+ machine__set_kernel_mmap_len(machine, event);
+
+ /*
+ * Avoid using a zero address (kptr_restrict) for the ref reloc
+ * symbol. Effectively having zero here means that at record
+ * time /proc/sys/kernel/kptr_restrict was non zero.
+ */
+ if (event->mmap.pgoff != 0) {
+ maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps,
+ symbol_name,
+ event->mmap.pgoff);
+ }
+
+ if (machine__is_default_guest(machine)) {
+ /*
+ * preload dso of guest kernel and modules
+ */
+ dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION],
+ NULL);
+ }
+ }
+ return 0;
+out_problem:
+ return -1;
+}
+
+int machine__process_mmap_event(struct machine *machine, union perf_event *event)
+{
+ u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
+ struct thread *thread;
+ struct map *map;
+ int ret = 0;
+
+ if (dump_trace)
+ perf_event__fprintf_mmap(event, stdout);
+
+ if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
+ cpumode == PERF_RECORD_MISC_KERNEL) {
+ ret = machine__process_kernel_mmap_event(machine, event);
+ if (ret < 0)
+ goto out_problem;
+ return 0;
+ }
+
+ thread = machine__findnew_thread(machine, event->mmap.pid);
+ if (thread == NULL)
+ goto out_problem;
+ map = map__new(&machine->user_dsos, event->mmap.start,
+ event->mmap.len, event->mmap.pgoff,
+ event->mmap.pid, event->mmap.filename,
+ MAP__FUNCTION);
+ if (map == NULL)
+ goto out_problem;
+
+ thread__insert_map(thread, map);
+ return 0;
+
+out_problem:
+ dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n");
+ return 0;
+}
+
+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);
+
+ if (dump_trace)
+ perf_event__fprintf_task(event, stdout);
+
+ if (thread == NULL || parent == NULL ||
+ thread__fork(thread, parent) < 0) {
+ dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+int machine__process_exit_event(struct machine *machine, union perf_event *event)
+{
+ struct thread *thread = machine__find_thread(machine, event->fork.tid);
+
+ if (dump_trace)
+ perf_event__fprintf_task(event, stdout);
+
+ if (thread != NULL)
+ machine__remove_thread(machine, thread);
+
+ return 0;
+}
+
+int machine__process_event(struct machine *machine, union perf_event *event)
+{
+ int ret;
+
+ switch (event->header.type) {
+ case PERF_RECORD_COMM:
+ ret = machine__process_comm_event(machine, event); break;
+ case PERF_RECORD_MMAP:
+ ret = machine__process_mmap_event(machine, event); break;
+ case PERF_RECORD_FORK:
+ ret = machine__process_fork_event(machine, event); break;
+ case PERF_RECORD_EXIT:
+ ret = machine__process_exit_event(machine, event); break;
+ case PERF_RECORD_LOST:
+ ret = machine__process_lost_event(machine, event); break;
+ default:
+ ret = -1;
+ break;
+ }
+
+ return ret;
+}