68 lines
		
	
	
		
			2.2 KiB
		
	
	
	
		
			Diff
		
	
	
	
	
	
			
		
		
	
	
			68 lines
		
	
	
		
			2.2 KiB
		
	
	
	
		
			Diff
		
	
	
	
	
	
Author: David McFarland <corngood@gmail.com>
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Date:   Mon Aug 6 15:52:11 2018 -0300
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    [PATCH] disk_cache: include dri driver path in cache key
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    This fixes invalid cache hits on NixOS where all shared library
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    timestamps in /nix/store are zero.
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diff --git a/meson_options.txt b/meson_options.txt
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index 512e05d..93001da 100644
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--- a/meson_options.txt
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+++ b/meson_options.txt
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@@ -513,6 +513,13 @@ option(
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   description : 'Enable direct rendering in GLX and EGL for DRI',
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 )
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+option(
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+  'disk-cache-key',
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+  type : 'string',
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+  value : '',
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+  description : 'Mesa cache key.'
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+)
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+
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 option('egl-lib-suffix',
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   type : 'string',
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   value : '',
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diff --git a/src/util/disk_cache.c b/src/util/disk_cache.c
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index 8298f9d..e622133 100644
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--- a/src/util/disk_cache.c
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+++ b/src/util/disk_cache.c
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@@ -226,8 +226,10 @@ disk_cache_type_create(const char *gpu_name,
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    /* Create driver id keys */
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    size_t id_size = strlen(driver_id) + 1;
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+   size_t key_size = strlen(DISK_CACHE_KEY) + 1;
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    size_t gpu_name_size = strlen(gpu_name) + 1;
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    cache->driver_keys_blob_size += id_size;
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+   cache->driver_keys_blob_size += key_size;
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    cache->driver_keys_blob_size += gpu_name_size;
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    /* We sometimes store entire structs that contains a pointers in the cache,
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@@ -248,6 +250,7 @@ disk_cache_type_create(const char *gpu_name,
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    uint8_t *drv_key_blob = cache->driver_keys_blob;
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    DRV_KEY_CPY(drv_key_blob, &cache_version, cv_size)
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    DRV_KEY_CPY(drv_key_blob, driver_id, id_size)
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+   DRV_KEY_CPY(drv_key_blob, DISK_CACHE_KEY, key_size)
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    DRV_KEY_CPY(drv_key_blob, gpu_name, gpu_name_size)
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    DRV_KEY_CPY(drv_key_blob, &ptr_size, ptr_size_size)
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    DRV_KEY_CPY(drv_key_blob, &driver_flags, driver_flags_size)
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diff --git a/src/util/meson.build b/src/util/meson.build
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index c0c1b9d..442163c 100644
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--- a/src/util/meson.build
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+++ b/src/util/meson.build
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@@ -268,7 +268,12 @@ _libmesa_util = static_library(
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   include_directories : [inc_util, include_directories('format')],
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   dependencies : deps_for_libmesa_util,
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   link_with: [libmesa_util_sse41],
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-  c_args : [c_msvc_compat_args],
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+  c_args : [
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+    c_msvc_compat_args,
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+    '-DDISK_CACHE_KEY="@0@"'.format(
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+      get_option('disk-cache-key')
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+    ),
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+  ],
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   gnu_symbol_visibility : 'hidden',
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   build_by_default : false
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 )
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