Merge branch 'uprobes-v7' of git://git.linaro.org/people/dave.long/linux into devel-stable

This patch series adds basic uprobes support to ARM. It is based on
patches developed earlier by Rabin Vincent. That approach of adding
hooks into the kprobes instruction parsing code was not well received.
This approach separates the ARM instruction parsing code in kprobes out
into a separate set of functions which can be used by both kprobes and
uprobes. Both kprobes and uprobes then provide their own semantic action
tables to process the results of the parsing.

7 files changed, 37 insertions, 5 deletions

diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 469eb679fb9d..3aa555ff9d89 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -8,6 +8,8 @@
  */
 
 #include "util.h"
+#include "ui/ui.h"
+#include "sort.h"
 #include "build-id.h"
 #include "color.h"
 #include "cache.h"
@@ -489,7 +491,7 @@ static int symbol__inc_addr_samples(struct symbol *sym, struct map *map,
 {
         struct annotation *notes;
 
-        if (sym == NULL || use_browser != 1 || !sort__has_sym)
+        if (sym == NULL)
                 return 0;
 
         notes = symbol__annotation(sym);
@@ -1399,3 +1401,8 @@ int hist_entry__annotate(struct hist_entry *he, size_t privsize)
 {
         return symbol__annotate(he->ms.sym, he->ms.map, privsize);
 }
+
+bool ui__has_annotation(void)
+{
+        return use_browser == 1 && sort__has_sym;
+}
diff --git a/tools/perf/util/annotate.h b/tools/perf/util/annotate.h
index b2aef59d6bb2..56ad4f5287de 100644
--- a/tools/perf/util/annotate.h
+++ b/tools/perf/util/annotate.h
@@ -151,6 +151,8 @@ void symbol__annotate_zero_histogram(struct symbol *sym, int evidx);
 void symbol__annotate_decay_histogram(struct symbol *sym, int evidx);
 void disasm__purge(struct list_head *head);
 
+bool ui__has_annotation(void);
+
 int symbol__tty_annotate(struct symbol *sym, struct map *map,
                          struct perf_evsel *evsel, bool print_lines,
                          bool full_paths, int min_pcnt, int max_lines);
diff --git a/tools/perf/util/include/linux/bitops.h b/tools/perf/util/include/linux/bitops.h
index 45cf10a562bd..dadfa7e54287 100644
--- a/tools/perf/util/include/linux/bitops.h
+++ b/tools/perf/util/include/linux/bitops.h
@@ -87,13 +87,15 @@ static __always_inline unsigned long __ffs(unsigned long word)
         return num;
 }
 
+typedef const unsigned long __attribute__((__may_alias__)) long_alias_t;
+
 /*
  * Find the first set bit in a memory region.
  */
 static inline unsigned long
 find_first_bit(const unsigned long *addr, unsigned long size)
 {
-        const unsigned long *p = addr;
+        long_alias_t *p = (long_alias_t *) addr;
         unsigned long result = 0;
         unsigned long tmp;
 
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index d248fca6d7ed..1e15df10a88c 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -1091,12 +1091,12 @@ int is_valid_tracepoint(const char *event_string)
 static bool is_event_supported(u8 type, unsigned config)
 {
         bool ret = true;
+        int open_return;
         struct perf_evsel *evsel;
         struct perf_event_attr attr = {
                 .type = type,
                 .config = config,
                 .disabled = 1,
-                .exclude_kernel = 1,
         };
         struct {
                 struct thread_map map;
@@ -1108,7 +1108,20 @@ static bool is_event_supported(u8 type, unsigned config)
 
         evsel = perf_evsel__new(&attr);
         if (evsel) {
-                ret = perf_evsel__open(evsel, NULL, &tmap.map) >= 0;
+                open_return = perf_evsel__open(evsel, NULL, &tmap.map);
+                ret = open_return >= 0;
+
+                if (open_return == -EACCES) {
+                        /*
+                         * This happens if the paranoid value
+                         * /proc/sys/kernel/perf_event_paranoid is set to 2
+                         * Re-run with exclude_kernel set; we don't do that
+                         * by default as some ARM machines do not support it.
+                         *
+                         */
+                        evsel->attr.exclude_kernel = 1;
+                        ret = perf_evsel__open(evsel, NULL, &tmap.map) >= 0;
+                }
                 perf_evsel__delete(evsel);
         }
 
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index a8a9b6cd93a8..d8b048c20cde 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -336,8 +336,8 @@ static int add_exec_to_probe_trace_events(struct probe_trace_event *tevs,
                 return ret;
 
         for (i = 0; i < ntevs && ret >= 0; i++) {
+                /* point.address is the addres of point.symbol + point.offset */
                 offset = tevs[i].point.address - stext;
-                offset += tevs[i].point.offset;
                 tevs[i].point.offset = 0;
                 zfree(&tevs[i].point.symbol);
                 ret = e_snprintf(buf, 32, "0x%lx", offset);
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 0b39a48e5110..5da6ce74c676 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -1008,6 +1008,12 @@ static int perf_session__process_user_event(struct perf_session *session, union
                 if (err == 0)
                         perf_session__set_id_hdr_size(session);
                 return err;
+        case PERF_RECORD_HEADER_EVENT_TYPE:
+                /*
+                 * Depreceated, but we need to handle it for sake
+                 * of old data files create in pipe mode.
+                 */
+                return 0;
         case PERF_RECORD_HEADER_TRACING_DATA:
                 /* setup for reading amidst mmap */
                 lseek(fd, file_offset, SEEK_SET);
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index a9d758a3b371..e89afc097d8a 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -1336,6 +1336,8 @@ int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter)
 
                         if (syms_ss && runtime_ss)
                                 break;
+                } else {
+                        symsrc__destroy(ss);
                 }
 
         }