perf report: Print more info instead of <unknown> entries
Sometimes we still fail to find a DSO or look up a symbol,
print out the raw information in this case (which an help
debug the problem), instead of a not very helpful <unknown>
string.
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: John Kacur <jkacur@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/Documentation/perf_counter/builtin-report.c b/Documentation/perf_counter/builtin-report.c
index b84aaf1..270e986 100644
--- a/Documentation/perf_counter/builtin-report.c
+++ b/Documentation/perf_counter/builtin-report.c
@@ -201,7 +201,9 @@
if (self != NULL) {
self->pid = pid;
- self->comm = NULL;
+ self->comm = malloc(30);
+ if (self->comm)
+ sprintf(self->comm, ":%d", pid);
INIT_LIST_HEAD(&self->maps);
}
@@ -333,7 +335,7 @@
static size_t
sort__comm_print(FILE *fp, struct hist_entry *self)
{
- return fprintf(fp, " %16s", self->thread->comm ?: "<unknown>");
+ return fprintf(fp, " %16s", self->thread->comm);
}
static struct sort_entry sort_comm = {
@@ -363,7 +365,10 @@
static size_t
sort__dso_print(FILE *fp, struct hist_entry *self)
{
- return fprintf(fp, " %-25s", self->dso ? self->dso->name : "<unknown>");
+ if (self->dso)
+ return fprintf(fp, " %-25s", self->dso->name);
+
+ return fprintf(fp, " %016llx", (__u64)self->ip);
}
static struct sort_entry sort_dso = {
@@ -392,11 +397,17 @@
size_t ret = 0;
if (verbose)
- ret += fprintf(fp, " %#018llx", (unsigned long long)self->ip);
+ ret += fprintf(fp, " %#018llx", (__u64)self->ip);
- ret += fprintf(fp, " %s: %s",
- self->dso ? self->dso->name : "<unknown>",
- self->sym ? self->sym->name : "<unknown>");
+ if (self->dso)
+ ret += fprintf(fp, " %s: ", self->dso->name);
+ else
+ ret += fprintf(fp, " %#016llx: ", (__u64)self->ip);
+
+ if (self->sym)
+ ret += fprintf(fp, "%s", self->sym->name);
+ else
+ ret += fprintf(fp, "%#016llx", (__u64)self->ip);
return ret;
}
@@ -772,7 +783,8 @@
event->mmap.filename);
}
if (thread == NULL || map == NULL) {
- fprintf(stderr, "problem processing PERF_EVENT_MMAP, skipping event.\n");
+ if (verbose)
+ fprintf(stderr, "problem processing PERF_EVENT_MMAP, skipping event.\n");
goto broken_event;
}
thread__insert_map(thread, map);