[Mesa-dev] [PATCH 2/2] anv: Use build-id for pipeline cache UUID.
Matt Turner
mattst88 at gmail.com
Tue Feb 14 18:51:40 UTC 2017
The --build-id=... ld flag has been present since binutils-2.18,
released 28 Aug 2007.
---
src/intel/vulkan/Makefile.am | 1 +
src/intel/vulkan/anv_device.c | 31 ++++++++++++-------------------
2 files changed, 13 insertions(+), 19 deletions(-)
diff --git a/src/intel/vulkan/Makefile.am b/src/intel/vulkan/Makefile.am
index 95f276e..4197b0e 100644
--- a/src/intel/vulkan/Makefile.am
+++ b/src/intel/vulkan/Makefile.am
@@ -165,6 +165,7 @@ libvulkan_intel_la_LDFLAGS = \
-module \
-no-undefined \
-avoid-version \
+ -Wl,--build-id=sha1 \
$(BSYMBOLIC) \
$(GC_SECTIONS) \
$(LD_NO_UNDEFINED)
diff --git a/src/intel/vulkan/anv_device.c b/src/intel/vulkan/anv_device.c
index 91ee67f..f09fd23 100644
--- a/src/intel/vulkan/anv_device.c
+++ b/src/intel/vulkan/anv_device.c
@@ -21,18 +21,17 @@
* IN THE SOFTWARE.
*/
-#include <dlfcn.h>
#include <assert.h>
#include <stdbool.h>
#include <string.h>
#include <sys/mman.h>
-#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include "anv_private.h"
#include "util/strtod.h"
#include "util/debug.h"
+#include "util/build_id.h"
#include "genxml/gen7_pack.h"
@@ -55,30 +54,24 @@ compiler_perf_log(void *data, const char *fmt, ...)
}
static bool
-anv_get_function_timestamp(void *ptr, uint32_t* timestamp)
+anv_device_get_cache_uuid(void *uuid)
{
- Dl_info info;
- struct stat st;
- if (!dladdr(ptr, &info) || !info.dli_fname)
+ const struct note *note = build_id_find_nhdr("libvulkan_intel.so");
+ if (!note)
return false;
- if (stat(info.dli_fname, &st))
+ unsigned len = build_id_length(note);
+ if (len < VK_UUID_SIZE)
return false;
- *timestamp = st.st_mtim.tv_sec;
- return true;
-}
-
-static bool
-anv_device_get_cache_uuid(void *uuid)
-{
- uint32_t timestamp;
-
- memset(uuid, 0, VK_UUID_SIZE);
- if (!anv_get_function_timestamp(anv_device_get_cache_uuid, ×tamp))
+ unsigned char *build_id = malloc(len);
+ if (!build_id)
return false;
- snprintf(uuid, VK_UUID_SIZE, "anv-%d", timestamp);
+ build_id_read(note, build_id);
+
+ memcpy(uuid, build_id, VK_UUID_SIZE);
+ free(build_id);
return true;
}
--
2.10.2
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