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util: add disk_cache_get_function_identifier() 

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 flatpak not having
real build timestamps.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
This commit is contained in:
Timothy Arceri 2018-09-19 11:44:12 +10:00
parent 6a884014e4
commit 83ea8dd99b
1 changed files with 16 additions and 0 deletions
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16
src/util/disk_cache.h
View File

@ -27,6 +27,7 @@
#ifdef HAVE_DLFCN_H
#include <dlfcn.h>
#include <stdio.h>
#include "util/build_id.h"
#endif
#include <assert.h>
#include <stdint.h>
@ -112,6 +113,21 @@ disk_cache_get_function_timestamp(void *ptr, uint32_t* timestamp)
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. */