perf tools: Factorize the map helpers

Factorize the dso mapping helpers into a single purpose common file
"util/map.c"

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Brice Goglin <Brice.Goglin@inria.fr>

5 files changed, 129 insertions, 1 deletions

diff --git a/tools/perf/util/callchain.h b/tools/perf/util/callchain.h
index a926ae4f5a16..43cf3ea9e088 100644
--- a/tools/perf/util/callchain.h
+++ b/tools/perf/util/callchain.h
@@ -4,6 +4,7 @@
 #include "../perf.h"
 #include <linux/list.h>
 #include <linux/rbtree.h>
+#include "util.h"
 #include "symbol.h"
 
 enum chain_mode {
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index 91e2fe589f27..d26dc887ce52 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -1,4 +1,8 @@
+#ifndef __PERF_EVENT_H
+#define __PERF_EVENT_H
 #include "../perf.h"
+#include "util.h"
+#include <linux/list.h>
 
 struct ip_event {
         struct perf_event_header header;
@@ -52,3 +56,29 @@ typedef union event_union {
         struct lost_event               lost;
         struct read_event               read;
 } event_t;
+
+struct map {
+        struct list_head        node;
+        u64                     start;
+        u64                     end;
+        u64                     pgoff;
+        u64                     (*map_ip)(struct map *, u64);
+        struct dso              *dso;
+};
+
+static inline u64 map__map_ip(struct map *map, u64 ip)
+{
+        return ip - map->start + map->pgoff;
+}
+
+static inline u64 vdso__map_ip(struct map *map __used, u64 ip)
+{
+        return ip;
+}
+
+struct map *map__new(struct mmap_event *event, char *cwd, int cwdlen);
+struct map *map__clone(struct map *self);
+int map__overlap(struct map *l, struct map *r);
+size_t map__fprintf(struct map *self, FILE *fp);
+
+#endif
diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
new file mode 100644
index 000000000000..804e02382739
--- /dev/null
+++ b/tools/perf/util/map.c
@@ -0,0 +1,97 @@
+#include "event.h"
+#include "symbol.h"
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+static inline int is_anon_memory(const char *filename)
+{
+        return strcmp(filename, "//anon") == 0;
+}
+
+static int strcommon(const char *pathname, char *cwd, int cwdlen)
+{
+        int n = 0;
+
+        while (n < cwdlen && pathname[n] == cwd[n])
+                ++n;
+
+        return n;
+}
+
+ struct map *map__new(struct mmap_event *event, char *cwd, int cwdlen)
+{
+        struct map *self = malloc(sizeof(*self));
+
+        if (self != NULL) {
+                const char *filename = event->filename;
+                char newfilename[PATH_MAX];
+                int anon;
+
+                if (cwd) {
+                        int n = strcommon(filename, cwd, cwdlen);
+
+                        if (n == cwdlen) {
+                                snprintf(newfilename, sizeof(newfilename),
+                                         ".%s", filename + n);
+                                filename = newfilename;
+                        }
+                }
+
+                anon = is_anon_memory(filename);
+
+                if (anon) {
+                        snprintf(newfilename, sizeof(newfilename), "/tmp/perf-%d.map", event->pid);
+                        filename = newfilename;
+                }
+
+                self->start = event->start;
+                self->end   = event->start + event->len;
+                self->pgoff = event->pgoff;
+
+                self->dso = dsos__findnew(filename);
+                if (self->dso == NULL)
+                        goto out_delete;
+
+                if (self->dso == vdso || anon)
+                        self->map_ip = vdso__map_ip;
+                else
+                        self->map_ip = map__map_ip;
+        }
+        return self;
+out_delete:
+        free(self);
+        return NULL;
+}
+
+struct map *map__clone(struct map *self)
+{
+        struct map *map = malloc(sizeof(*self));
+
+        if (!map)
+                return NULL;
+
+        memcpy(map, self, sizeof(*self));
+
+        return map;
+}
+
+int map__overlap(struct map *l, struct map *r)
+{
+        if (l->start > r->start) {
+                struct map *t = l;
+                l = r;
+                r = t;
+        }
+
+        if (l->end > r->start)
+                return 1;
+
+        return 0;
+}
+
+size_t map__fprintf(struct map *self, FILE *fp)
+{
+        return fprintf(fp, " %Lx-%Lx %Lx %s\n",
+                       self->start, self->end, self->pgoff, self->dso->name);
+}
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index f3490fcd40ee..50f723571241 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -6,6 +6,7 @@
 #include <linux/list.h>
 #include <linux/rbtree.h>
 #include "module.h"
+#include "event.h"
 
 struct symbol {
         struct rb_node  rb_node;
diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h
index be4b52cca2c3..d61a6f037631 100644
--- a/tools/perf/util/util.h
+++ b/tools/perf/util/util.h
@@ -83,7 +83,6 @@
 #include <inttypes.h>
 #include "../../../include/linux/magic.h"
 
-#include "event.h"
 
 #ifndef NO_ICONV
 #include <iconv.h>