perf symbols: Introduce thread__find_cpumode_addr_location

Its one level up thread__find_addr_location, where it will look in
different domains for a sample: user, kernel, hypervisor, etc.

Will soon be used by a patchkit by Andi Kleen.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
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@kernel.org>
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-so6nxkh7xj48bc5kq4jpj991@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

3 files changed, 34 insertions, 25 deletions

diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 813e94e7cf29..a6799538069c 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -1184,39 +1184,22 @@ static bool symbol__match_regex(struct symbol *sym, regex_t *regex)
         return 0;
 }
 
-static const u8 cpumodes[] = {
-        PERF_RECORD_MISC_USER,
-        PERF_RECORD_MISC_KERNEL,
-        PERF_RECORD_MISC_GUEST_USER,
-        PERF_RECORD_MISC_GUEST_KERNEL
-};
-#define NCPUMODES (sizeof(cpumodes)/sizeof(u8))
-
 static void ip__resolve_ams(struct machine *machine, struct thread *thread,
                             struct addr_map_symbol *ams,
                             u64 ip)
 {
         struct addr_location al;
-        size_t i;
-        u8 m;
 
         memset(&al, 0, sizeof(al));
+        /*
+         * We cannot use the header.misc hint to determine whether a
+         * branch stack address is user, kernel, guest, hypervisor.
+         * Branches may straddle the kernel/user/hypervisor boundaries.
+         * Thus, we have to try consecutively until we find a match
+         * or else, the symbol is unknown
+         */
+        thread__find_cpumode_addr_location(thread, machine, MAP__FUNCTION, ip, &al);
 
-        for (i = 0; i < NCPUMODES; i++) {
-                m = cpumodes[i];
-                /*
-                 * We cannot use the header.misc hint to determine whether a
-                 * branch stack address is user, kernel, guest, hypervisor.
-                 * Branches may straddle the kernel/user/hypervisor boundaries.
-                 * Thus, we have to try consecutively until we find a match
-                 * or else, the symbol is unknown
-                 */
-                thread__find_addr_location(thread, machine, m, MAP__FUNCTION,
-                                ip, &al);
-                if (al.map)
-                        goto found;
-        }
-found:
         ams->addr = ip;
         ams->al_addr = al.addr;
         ams->sym = al.sym;
diff --git a/tools/perf/util/thread.c b/tools/perf/util/thread.c
index 0358882c8910..3ce0498bdae6 100644
--- a/tools/perf/util/thread.c
+++ b/tools/perf/util/thread.c
@@ -142,3 +142,24 @@ int thread__fork(struct thread *thread, struct thread *parent, u64 timestamp)
 
         return 0;
 }
+
+void thread__find_cpumode_addr_location(struct thread *thread,
+                                        struct machine *machine,
+                                        enum map_type type, u64 addr,
+                                        struct addr_location *al)
+{
+        size_t i;
+        const u8 const cpumodes[] = {
+                PERF_RECORD_MISC_USER,
+                PERF_RECORD_MISC_KERNEL,
+                PERF_RECORD_MISC_GUEST_USER,
+                PERF_RECORD_MISC_GUEST_KERNEL
+        };
+
+        for (i = 0; i < ARRAY_SIZE(cpumodes); i++) {
+                thread__find_addr_location(thread, machine, cpumodes[i], type,
+                                           addr, al);
+                if (al->map)
+                        break;
+        }
+}
diff --git a/tools/perf/util/thread.h b/tools/perf/util/thread.h
index 5b856bf942e1..9a070743270c 100644
--- a/tools/perf/util/thread.h
+++ b/tools/perf/util/thread.h
@@ -58,6 +58,11 @@ void thread__find_addr_location(struct thread *thread, struct machine *machine,
                                 u8 cpumode, enum map_type type, u64 addr,
                                 struct addr_location *al);
 
+void thread__find_cpumode_addr_location(struct thread *thread,
+                                        struct machine *machine,
+                                        enum map_type type, u64 addr,
+                                        struct addr_location *al);
+
 static inline void *thread__priv(struct thread *thread)
 {
         return thread->priv;