perf unwind: Fix looking up dwarf unwind stack info
[muen/linux.git] / tools / perf / util / dso.c
index d2c6cdd9d42b72a194d913bdc1840d5ff72bb281..28d41e709128f51414817ad21a16ea636c007709 100644 (file)
@@ -9,6 +9,13 @@
 #include "debug.h"
 #include "vdso.h"
 
+static const char * const debuglink_paths[] = {
+       "%.0s%s",
+       "%s/%s",
+       "%s/.debug/%s",
+       "/usr/lib/debug%s/%s"
+};
+
 char dso__symtab_origin(const struct dso *dso)
 {
        static const char origin[] = {
@@ -44,24 +51,43 @@ int dso__read_binary_type_filename(const struct dso *dso,
        size_t len;
 
        switch (type) {
-       case DSO_BINARY_TYPE__DEBUGLINK: {
-               char *debuglink;
+       case DSO_BINARY_TYPE__DEBUGLINK:
+       {
+               const char *last_slash;
+               char dso_dir[PATH_MAX];
+               char symfile[PATH_MAX];
+               unsigned int i;
 
                len = __symbol__join_symfs(filename, size, dso->long_name);
-               debuglink = filename + len;
-               while (debuglink != filename && *debuglink != '/')
-                       debuglink--;
-               if (*debuglink == '/')
-                       debuglink++;
+               last_slash = filename + len;
+               while (last_slash != filename && *last_slash != '/')
+                       last_slash--;
 
-               ret = -1;
-               if (!is_regular_file(filename))
+               strncpy(dso_dir, filename, last_slash - filename);
+               dso_dir[last_slash-filename] = '\0';
+
+               if (!is_regular_file(filename)) {
+                       ret = -1;
+                       break;
+               }
+
+               ret = filename__read_debuglink(filename, symfile, PATH_MAX);
+               if (ret)
                        break;
 
-               ret = filename__read_debuglink(filename, debuglink,
-                                              size - (debuglink - filename));
+               /* Check predefined locations where debug file might reside */
+               ret = -1;
+               for (i = 0; i < ARRAY_SIZE(debuglink_paths); i++) {
+                       snprintf(filename, size,
+                                       debuglink_paths[i], dso_dir, symfile);
+                       if (is_regular_file(filename)) {
+                               ret = 0;
+                               break;
+                       }
                }
+
                break;
+       }
        case DSO_BINARY_TYPE__BUILD_ID_CACHE:
                if (dso__build_id_filename(dso, filename, size) == NULL)
                        ret = -1;