This can be used as a drop in replacement for
disk_cache_get_function_timestamp().
Here we use build-id to generate a driver-id rather than build
timestamp if available. This should resolve issues such as
distros using reproducable builds and flatpack not having
real build timestamps.
---
src/util/disk_cache.h | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/src/util/disk_cache.h b/src/util/disk_cache.h
index 50bd9f41ac4..962a26ffc8c 100644
--- a/src/util/disk_cache.h
+++ b/src/util/disk_cache.h
@@ -26,6 +26,7 @@
#ifdef HAVE_DLFCN_H
#include <dlfcn.h>
+#include "util/build_id.h"
#endif
#include <assert.h>
#include <stdint.h>
@@ -103,6 +104,21 @@ disk_cache_get_function_timestamp(void *ptr, uint32_t*
timestamp)
*timestamp = st.st_mtime;
return true;
}
+
+static inline bool
+disk_cache_get_function_identifier(void *ptr, uint32_t *id)
+{
+#ifdef HAVE_DL_ITERATE_PHDR
+ const struct build_id_note *note = NULL;
+ if ((note = build_id_find_nhdr_for_addr(ptr))) {
+ const uint8_t *id_sha1 = build_id_data(note);
+ assert(id_sha1);
+ *id = *id_sha1;
+ return true;
+ } else
+#endif
+ return disk_cache_get_function_timestamp(ptr, id);
+}
#endif
/* Provide inlined stub functions if the shader cache is disabled. */
--
2.17.1
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