From: Victor Chiletto vchiletto@codeweavers.com
We potentially generate OOB accesses during loop unrolling that are later deleted. --- libs/vkd3d-shader/hlsl_codegen.c | 173 ++++++++++++++++++++++--------- 1 file changed, 124 insertions(+), 49 deletions(-)
diff --git a/libs/vkd3d-shader/hlsl_codegen.c b/libs/vkd3d-shader/hlsl_codegen.c index 5c09ce04f..882401665 100644 --- a/libs/vkd3d-shader/hlsl_codegen.c +++ b/libs/vkd3d-shader/hlsl_codegen.c @@ -1954,6 +1954,76 @@ bool hlsl_copy_propagation_execute(struct hlsl_ctx *ctx, struct hlsl_block *bloc return progress; }
+enum validation_result +{ + DEREF_VALIDATION_OK, + DEREF_VALIDATION_OUT_OF_BOUNDS, + DEREF_VALIDATION_NOT_CONSTANT, +}; + +static enum validation_result hlsl_validate_component_index_range_from_deref(struct hlsl_ctx *ctx, const struct hlsl_deref *deref) +{ + struct hlsl_type *type = deref->var->data_type; + unsigned int i; + + for (i = 0; i < deref->path_len; ++i) + { + struct hlsl_ir_node *path_node = deref->path[i].node; + unsigned int idx = 0; + + assert(path_node); + if (path_node->type != HLSL_IR_CONSTANT) + return DEREF_VALIDATION_NOT_CONSTANT; + + /* We should always have generated a cast to UINT. */ + assert(path_node->data_type->class == HLSL_CLASS_SCALAR + && path_node->data_type->base_type == HLSL_TYPE_UINT); + + idx = hlsl_ir_constant(path_node)->value.u[0].u; + + switch (type->class) + { + case HLSL_CLASS_VECTOR: + if (idx >= type->dimx) + { + hlsl_error(ctx, &path_node->loc, VKD3D_SHADER_ERROR_HLSL_OFFSET_OUT_OF_BOUNDS, + "Vector index is out of bounds. %u/%u", idx, type->dimx); + return DEREF_VALIDATION_OUT_OF_BOUNDS; + } + break; + + case HLSL_CLASS_MATRIX: + if (idx >= hlsl_type_major_size(type)) + { + hlsl_error(ctx, &path_node->loc, VKD3D_SHADER_ERROR_HLSL_OFFSET_OUT_OF_BOUNDS, + "Matrix index is out of bounds. %u/%u", idx, hlsl_type_major_size(type)); + return DEREF_VALIDATION_OUT_OF_BOUNDS; + } + break; + + case HLSL_CLASS_ARRAY: + if (idx >= type->e.array.elements_count) + { + hlsl_error(ctx, &path_node->loc, VKD3D_SHADER_ERROR_HLSL_OFFSET_OUT_OF_BOUNDS, + "Array index is out of bounds. %u/%u (%p, %u)", idx, type->e.array.elements_count, path_node, path_node->index); + return DEREF_VALIDATION_OUT_OF_BOUNDS; + } + break; + + case HLSL_CLASS_STRUCT: + break; + + default: + vkd3d_unreachable(); + } + + type = hlsl_get_element_type_from_path_index(ctx, type, path_node); + } + + return DEREF_VALIDATION_OK; +} + + static void note_non_static_deref_expressions(struct hlsl_ctx *ctx, const struct hlsl_deref *deref, const char *usage) { @@ -1971,60 +2041,77 @@ static void note_non_static_deref_expressions(struct hlsl_ctx *ctx, const struct } }
-static bool validate_static_object_references(struct hlsl_ctx *ctx, struct hlsl_ir_node *instr, +static bool validate_dereferences(struct hlsl_ctx *ctx, struct hlsl_ir_node *instr, void *context) { - unsigned int start, count; - - if (instr->type == HLSL_IR_RESOURCE_LOAD) + switch (instr->type) { - struct hlsl_ir_resource_load *load = hlsl_ir_resource_load(instr); - - if (!load->resource.var->is_uniform) + case HLSL_IR_RESOURCE_LOAD: { - hlsl_error(ctx, &instr->loc, VKD3D_SHADER_ERROR_HLSL_NON_STATIC_OBJECT_REF, - "Loaded resource must have a single uniform source."); + struct hlsl_ir_resource_load *load = hlsl_ir_resource_load(instr); + + if (!load->resource.var->is_uniform) + { + hlsl_error(ctx, &instr->loc, VKD3D_SHADER_ERROR_HLSL_NON_STATIC_OBJECT_REF, + "Loaded resource must have a single uniform source."); + } + else if (hlsl_validate_component_index_range_from_deref(ctx, &load->resource) == DEREF_VALIDATION_NOT_CONSTANT) + { + hlsl_error(ctx, &instr->loc, VKD3D_SHADER_ERROR_HLSL_NON_STATIC_OBJECT_REF, + "Loaded resource from "%s" must be determinable at compile time.", + load->resource.var->name); + note_non_static_deref_expressions(ctx, &load->resource, "loaded resource"); + } + + if (load->sampler.var) + { + if (!load->sampler.var->is_uniform) + { + hlsl_error(ctx, &instr->loc, VKD3D_SHADER_ERROR_HLSL_NON_STATIC_OBJECT_REF, + "Resource load sampler must have a single uniform source."); + } + else if (hlsl_validate_component_index_range_from_deref(ctx, &load->sampler) == DEREF_VALIDATION_NOT_CONSTANT) + { + hlsl_error(ctx, &instr->loc, VKD3D_SHADER_ERROR_HLSL_NON_STATIC_OBJECT_REF, + "Resource load sampler from "%s" must be determinable at compile time.", + load->sampler.var->name); + note_non_static_deref_expressions(ctx, &load->sampler, "resource load sampler"); + } + } + break; } - else if (!hlsl_component_index_range_from_deref(ctx, &load->resource, &start, &count)) + case HLSL_IR_RESOURCE_STORE: { - hlsl_error(ctx, &instr->loc, VKD3D_SHADER_ERROR_HLSL_NON_STATIC_OBJECT_REF, - "Loaded resource from "%s" must be determinable at compile time.", - load->resource.var->name); - note_non_static_deref_expressions(ctx, &load->resource, "loaded resource"); - } + struct hlsl_ir_resource_store *store = hlsl_ir_resource_store(instr);
- if (load->sampler.var) - { - if (!load->sampler.var->is_uniform) + if (!store->resource.var->is_uniform) { hlsl_error(ctx, &instr->loc, VKD3D_SHADER_ERROR_HLSL_NON_STATIC_OBJECT_REF, - "Resource load sampler must have a single uniform source."); + "Accessed resource must have a single uniform source."); } - else if (!hlsl_component_index_range_from_deref(ctx, &load->sampler, &start, &count)) + else if (hlsl_validate_component_index_range_from_deref(ctx, &store->resource) == DEREF_VALIDATION_NOT_CONSTANT) { hlsl_error(ctx, &instr->loc, VKD3D_SHADER_ERROR_HLSL_NON_STATIC_OBJECT_REF, - "Resource load sampler from "%s" must be determinable at compile time.", - load->sampler.var->name); - note_non_static_deref_expressions(ctx, &load->sampler, "resource load sampler"); + "Accessed resource from "%s" must be determinable at compile time.", + store->resource.var->name); + note_non_static_deref_expressions(ctx, &store->resource, "accessed resource"); } + break; } - } - else if (instr->type == HLSL_IR_RESOURCE_STORE) - { - struct hlsl_ir_resource_store *store = hlsl_ir_resource_store(instr); - - if (!store->resource.var->is_uniform) + case HLSL_IR_LOAD: { - hlsl_error(ctx, &instr->loc, VKD3D_SHADER_ERROR_HLSL_NON_STATIC_OBJECT_REF, - "Accessed resource must have a single uniform source."); + struct hlsl_ir_load *load = hlsl_ir_load(instr); + hlsl_validate_component_index_range_from_deref(ctx, &load->src); + break; } - else if (!hlsl_component_index_range_from_deref(ctx, &store->resource, &start, &count)) + case HLSL_IR_STORE: { - hlsl_error(ctx, &instr->loc, VKD3D_SHADER_ERROR_HLSL_NON_STATIC_OBJECT_REF, - "Accessed resource from "%s" must be determinable at compile time.", - store->resource.var->name); - note_non_static_deref_expressions(ctx, &store->resource, "accessed resource"); + struct hlsl_ir_store *store = hlsl_ir_store(instr); + hlsl_validate_component_index_range_from_deref(ctx, &store->lhs); + break; } + default: + break; }
return false; @@ -5034,21 +5121,13 @@ bool hlsl_component_index_range_from_deref(struct hlsl_ctx *ctx, const struct hl { case HLSL_CLASS_VECTOR: if (idx >= type->dimx) - { - hlsl_error(ctx, &path_node->loc, VKD3D_SHADER_ERROR_HLSL_OFFSET_OUT_OF_BOUNDS, - "Vector index is out of bounds. %u/%u", idx, type->dimx); return false; - } *start += idx; break;
case HLSL_CLASS_MATRIX: if (idx >= hlsl_type_major_size(type)) - { - hlsl_error(ctx, &path_node->loc, VKD3D_SHADER_ERROR_HLSL_OFFSET_OUT_OF_BOUNDS, - "Matrix index is out of bounds. %u/%u", idx, hlsl_type_major_size(type)); return false; - } if (hlsl_type_is_row_major(type)) *start += idx * type->dimx; else @@ -5057,11 +5136,7 @@ bool hlsl_component_index_range_from_deref(struct hlsl_ctx *ctx, const struct hl
case HLSL_CLASS_ARRAY: if (idx >= type->e.array.elements_count) - { - hlsl_error(ctx, &path_node->loc, VKD3D_SHADER_ERROR_HLSL_OFFSET_OUT_OF_BOUNDS, - "Array index is out of bounds. %u/%u", idx, type->e.array.elements_count); return false; - } *start += idx * hlsl_type_component_count(type->e.array.type); break;
@@ -5450,7 +5525,7 @@ int hlsl_emit_bytecode(struct hlsl_ctx *ctx, struct hlsl_ir_function_decl *entry lower_ir(ctx, lower_casts_to_bool, body); lower_ir(ctx, lower_int_dot, body);
- hlsl_transform_ir(ctx, validate_static_object_references, body, NULL); + hlsl_transform_ir(ctx, validate_dereferences, body, NULL); hlsl_transform_ir(ctx, track_object_components_sampler_dim, body, NULL); if (profile->major_version >= 4) hlsl_transform_ir(ctx, lower_combined_samples, body, NULL);