From b8d1242c0bb29ef6866cbfdd75cb18eec9ba8068 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Jos=C3=A9=20Fonseca?= Date: Wed, 28 Sep 2011 20:23:13 +0100 Subject: [PATCH] llvmpipe: Prevent segfault during fs variant cache shrinking. --- src/gallium/drivers/llvmpipe/lp_state_fs.c | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) diff --git a/src/gallium/drivers/llvmpipe/lp_state_fs.c b/src/gallium/drivers/llvmpipe/lp_state_fs.c index 6243a96f454..646c38d2aee 100644 --- a/src/gallium/drivers/llvmpipe/lp_state_fs.c +++ b/src/gallium/drivers/llvmpipe/lp_state_fs.c @@ -1366,10 +1366,21 @@ llvmpipe_update_fs(struct llvmpipe_context *lp) */ llvmpipe_finish(pipe, __FUNCTION__); - for (i = 0; i < LP_MAX_SHADER_VARIANTS / 4; i++) { - struct lp_fs_variant_list_item *item; - item = last_elem(&lp->fs_variants_list); - llvmpipe_remove_shader_variant(lp, item->base); + /* + * We need to re-check lp->nr_fs_variants because an arbitrarliy large + * number of shader variants (potentially all of them) could be + * pending for destruction on flush. + */ + + if (lp->nr_fs_variants >= LP_MAX_SHADER_VARIANTS) { + for (i = 0; i < LP_MAX_SHADER_VARIANTS / 4; i++) { + struct lp_fs_variant_list_item *item; + item = last_elem(&lp->fs_variants_list); + if (!item) { + break; + } + llvmpipe_remove_shader_variant(lp, item->base); + } } } -- 2.30.2