1 files changed, 63 insertions, 1 deletions

diff --git a/tools/perf/util/config.c b/tools/perf/util/config.c
index dabe892d0e53..e02d78cae70f 100644
--- a/tools/perf/util/config.c
+++ b/tools/perf/util/config.c
@@ -11,6 +11,11 @@
 
 #define MAXNAME (256)
 
+#define DEBUG_CACHE_DIR ".debug"
+
+
+char buildid_dir[MAXPATHLEN]; /* root dir for buildid, binary cache */
+
 static FILE *config_file;
 static const char *config_file_name;
 static int config_linenr;
@@ -127,7 +132,7 @@ static int get_value(config_fn_t fn, void *data, char *name, unsigned int len)
                         break;
                 if (!iskeychar(c))
                         break;
-                name[len++] = tolower(c);
+                name[len++] = c;
                 if (len >= MAXNAME)
                         return -1;
         }
@@ -327,6 +332,13 @@ int perf_config_bool(const char *name, const char *value)
         return !!perf_config_bool_or_int(name, value, &discard);
 }
 
+const char *perf_config_dirname(const char *name, const char *value)
+{
+        if (!name)
+                return NULL;
+        return value;
+}
+
 static int perf_default_core_config(const char *var __used, const char *value __used)
 {
         /* Add other config variables here and to Documentation/config.txt. */
@@ -428,3 +440,53 @@ int config_error_nonbool(const char *var)
 {
         return error("Missing value for '%s'", var);
 }
+
+struct buildid_dir_config {
+        char *dir;
+};
+
+static int buildid_dir_command_config(const char *var, const char *value,
+                                      void *data)
+{
+        struct buildid_dir_config *c = data;
+        const char *v;
+
+        /* same dir for all commands */
+        if (!prefixcmp(var, "buildid.") && !strcmp(var + 8, "dir")) {
+                v = perf_config_dirname(var, value);
+                if (!v)
+                        return -1;
+                strncpy(c->dir, v, MAXPATHLEN-1);
+                c->dir[MAXPATHLEN-1] = '\0';
+        }
+        return 0;
+}
+
+static void check_buildid_dir_config(void)
+{
+        struct buildid_dir_config c;
+        c.dir = buildid_dir;
+        perf_config(buildid_dir_command_config, &c);
+}
+
+void set_buildid_dir(void)
+{
+        buildid_dir[0] = '\0';
+
+        /* try config file */
+        check_buildid_dir_config();
+
+        /* default to $HOME/.debug */
+        if (buildid_dir[0] == '\0') {
+                char *v = getenv("HOME");
+                if (v) {
+                        snprintf(buildid_dir, MAXPATHLEN-1, "%s/%s",
+                                 v, DEBUG_CACHE_DIR);
+                } else {
+                        strncpy(buildid_dir, DEBUG_CACHE_DIR, MAXPATHLEN-1);
+                }
+                buildid_dir[MAXPATHLEN-1] = '\0';
+        }
+        /* for communicating with external commands */
+        setenv("PERF_BUILDID_DIR", buildid_dir, 1);
+}