]> git.tdb.fi Git - libs/gl.git/blobdiff - source/glsl/validate.cpp
Check that non-constant data is not accessed from constant expressions
[libs/gl.git] / source / glsl / validate.cpp
index 0096ff5e5106f5a0547b24472a2a3397968e5cad..62f997bb5c29ad6d8a507620c3d78745118fc80f 100644 (file)
@@ -3,6 +3,7 @@
 #include <msp/core/raii.h>
 #include <msp/strings/format.h>
 #include <msp/strings/utils.h>
+#include "reflect.h"
 #include "validate.h"
 
 using namespace std;
@@ -69,16 +70,26 @@ void DeclarationValidator::visit(Layout &layout)
                        allowed = (variable && scope==GLOBAL);
                else if(i->name=="binding" || i->name=="set")
                {
+                       if(i->name=="set")
+                       {
+                               error(layout, "Layout qualifier 'set' not allowed when targeting OpenGL");
+                               continue;
+                       }
+
                        if(variable)
                        {
                                TypeDeclaration *type = variable->type_declaration;
                                while(BasicTypeDeclaration *basic = dynamic_cast<BasicTypeDeclaration *>(type))
                                        type = basic->base_type;
-                               allowed = (scope==GLOBAL && dynamic_cast<ImageTypeDeclaration *>(type));
-                               err_descr = "variable of non-opaque type";
+                               bool uniform = (variable->interface=="uniform");
+                               allowed = (scope==GLOBAL && uniform && dynamic_cast<ImageTypeDeclaration *>(type));
+                               err_descr = (uniform ? "variable of non-opaque type" : "non-uniform variable");
                        }
                        else if(iface_block)
-                               allowed = true;
+                       {
+                               allowed = (iface_block->interface=="uniform");
+                               err_descr = "non-uniform interface block";
+                       }
                }
                else if(i->name=="constant_id")
                {
@@ -103,7 +114,9 @@ void DeclarationValidator::visit(Layout &layout)
                        }
                }
                else if(i->name=="offset")
-                       allowed = (variable && scope==INTERFACE_BLOCK);
+                       allowed = (variable && scope==INTERFACE_BLOCK && iface_block->interface=="uniform");
+               else if(i->name=="align")
+                       allowed = (scope==INTERFACE_BLOCK && iface_block->interface=="uniform");
                else if(i->name=="points")
                {
                        allowed = (stage->type==Stage::GEOMETRY && iface_layout && (iface_layout->interface=="in" || iface_layout->interface=="out"));
@@ -128,6 +141,18 @@ void DeclarationValidator::visit(Layout &layout)
                        allowed = (iface_block && !variable && iface_block->interface=="uniform");
                        value = false;
                }
+               else if(i->name=="column_major" || i->name=="row_major")
+               {
+                       allowed = (variable && scope==INTERFACE_BLOCK);
+                       if(allowed)
+                       {
+                               BasicTypeDeclaration *basic = dynamic_cast<BasicTypeDeclaration *>(variable->type_declaration);
+                               while(basic && basic->kind==BasicTypeDeclaration::ARRAY)
+                                       basic = dynamic_cast<BasicTypeDeclaration *>(basic->base_type);
+                               allowed = (basic && basic->kind==BasicTypeDeclaration::MATRIX);
+                               err_descr = "non-matrix variable";
+                       }
+               }
 
                if(!allowed)
                {
@@ -203,6 +228,8 @@ void DeclarationValidator::visit(VariableDeclaration &var)
        {
                if(scope==STRUCT || scope==INTERFACE_BLOCK)
                        error(var, format("Constant qualifier not allowed on %s", descr));
+               if(!var.init_expression)
+                       error(var, "Constant variable must have an initializer");
        }
 
        if(!var.interpolation.empty() || !var.sampling.empty())
@@ -224,8 +251,12 @@ void DeclarationValidator::visit(VariableDeclaration &var)
        }
 
        TypeDeclaration *type = var.type_declaration;
+       BasicTypeDeclaration::Kind kind = BasicTypeDeclaration::ALIAS;
        while(BasicTypeDeclaration *basic = dynamic_cast<BasicTypeDeclaration *>(type))
+       {
+               kind = basic->kind;
                type = basic->base_type;
+       }
        if(dynamic_cast<ImageTypeDeclaration *>(type))
        {
                if(scope!=GLOBAL && scope!=FUNCTION_PARAM)
@@ -233,6 +264,10 @@ void DeclarationValidator::visit(VariableDeclaration &var)
                else if(scope==GLOBAL && var.interface!="uniform")
                        error(var, format("Type '%s' only allowed with uniform interface", type->name));
        }
+       else if(kind==BasicTypeDeclaration::VOID)
+               error(var, "Type 'void' not allowed on variable");
+       else if(kind==BasicTypeDeclaration::BOOL && !var.interface.empty() && var.source!=BUILTIN_SOURCE)
+               error(var, "Type 'bool' not allowed on interface variable");
 
        if(var.init_expression)
        {
@@ -326,7 +361,7 @@ void IdentifierValidator::visit(VariableDeclaration &var)
 
 void IdentifierValidator::visit(InterfaceBlock &iface)
 {
-       string key = iface.interface+iface.block_name;
+       string key = format("%s %s", iface.interface, iface.block_name);
        map<string, InterfaceBlock *>::const_iterator i = interface_blocks.find(key);
        if(i!=interface_blocks.end())
                multiple_definition(format("interface block '%s %s'", iface.interface, iface.block_name), iface, *i->second);
@@ -473,9 +508,22 @@ void ReferenceValidator::visit(FunctionDeclaration &func)
 
 
 ExpressionValidator::ExpressionValidator():
-       current_function(0)
+       current_function(0),
+       constant_expression(false)
 { }
 
+void ExpressionValidator::visit(VariableReference &var)
+{
+       if(var.declaration && constant_expression && !var.declaration->constant)
+               error(var, format("Reference to non-constant variable '%s' in a constant expression", var.name));
+}
+
+void ExpressionValidator::visit(InterfaceBlockReference &iface)
+{
+       if(constant_expression)
+               error(iface, format("Reference to interface block '%s' in a constant expression", iface.name));
+}
+
 void ExpressionValidator::visit(Swizzle &swizzle)
 {
        unsigned size = 0;
@@ -520,8 +568,13 @@ void ExpressionValidator::visit(UnaryExpression &unary)
        {
                if(!unary.type)
                        error(unary, format("No matching operator '%s' found for '%s'", unary.oper->token, unary.expression->type->name));
-               else if((unary.oper->token[1]=='+' || unary.oper->token[1]=='-') && !unary.expression->lvalue)
-                       error(unary, format("Operand of '%s' is not an lvalue", unary.oper->token));
+               else if(unary.oper->token[1]=='+' || unary.oper->token[1]=='-')
+               {
+                       if(constant_expression)
+                               error(unary, format("Use of '%s' in a constant expression", unary.oper->token));
+                       else if(!unary.expression->lvalue)
+                               error(unary, format("Operand of '%s' is not an lvalue", unary.oper->token));
+               }
        }
        TraversingVisitor::visit(unary);
 }
@@ -544,7 +597,9 @@ void ExpressionValidator::visit(Assignment &assign)
 {
        if(assign.left->type)
        {
-               if(!assign.left->lvalue)
+               if(constant_expression)
+                       error(assign, "Assignment in constant expression");
+               else if(!assign.left->lvalue)
                        error(assign, "Target of assignment is not an lvalue");
                if(assign.right->type)
                {
@@ -581,7 +636,19 @@ void ExpressionValidator::visit(VariableDeclaration &var)
        if(var.init_expression && var.init_expression->type && var.type_declaration && var.init_expression->type!=var.type_declaration)
                error(var, format("Initializing a variable of type '%s' with an expression of incompatible type '%s'",
                        var.type_declaration->name, var.init_expression->type->name));
-       TraversingVisitor::visit(var);
+
+       if(var.layout)
+               var.layout->visit(*this);
+       if(var.init_expression)
+       {
+               SetFlag set_const(constant_expression, var.constant);
+               TraversingVisitor::visit(var.init_expression);
+       }
+       if(var.array_size)
+       {
+               SetFlag set_const(constant_expression);
+               TraversingVisitor::visit(var.array_size);
+       }
 }
 
 void ExpressionValidator::visit(FunctionDeclaration &func)
@@ -590,6 +657,28 @@ void ExpressionValidator::visit(FunctionDeclaration &func)
        TraversingVisitor::visit(func);
 }
 
+void ExpressionValidator::visit(Conditional &cond)
+{
+       if(cond.condition->type)
+       {
+               BasicTypeDeclaration *basic_cond = dynamic_cast<BasicTypeDeclaration *>(cond.condition->type);
+               if(!basic_cond || basic_cond->kind!=BasicTypeDeclaration::BOOL)
+                       error(cond, "Condition is not a boolean");
+       }
+       TraversingVisitor::visit(cond);
+}
+
+void ExpressionValidator::visit(Iteration &iter)
+{
+       if(iter.condition->type)
+       {
+               BasicTypeDeclaration *basic_cond = dynamic_cast<BasicTypeDeclaration *>(iter.condition->type);
+               if(!basic_cond || basic_cond->kind!=BasicTypeDeclaration::BOOL)
+                       error(iter, "Loop condition is not a boolean");
+       }
+       TraversingVisitor::visit(iter);
+}
+
 void ExpressionValidator::visit(Return &ret)
 {
        if(current_function && current_function->return_type_declaration)
@@ -633,14 +722,14 @@ void StageInterfaceValidator::visit(VariableDeclaration &var)
                }
                if(var.type_declaration && var.linked_declaration->type_declaration)
                {
-                       const TypeDeclaration *type = var.type_declaration;
+                       TypeDeclaration *type = var.type_declaration;
                        if(stage->type==Stage::GEOMETRY)
                        {
                                if(const BasicTypeDeclaration *basic = dynamic_cast<const BasicTypeDeclaration *>(type))
                                        if(basic->kind==BasicTypeDeclaration::ARRAY && basic->base_type)
                                                type = basic->base_type;
                        }
-                       if(!is_same_type(*type, *var.linked_declaration->type_declaration))
+                       if(!TypeComparer().apply(*type, *var.linked_declaration->type_declaration))
                        {
                                error(var, format("Mismatched type '%s' for 'in %s'", type->name, var.name));
                                add_info(*var.linked_declaration, format("Linked to 'out %s' with type '%s'",
@@ -653,12 +742,7 @@ void StageInterfaceValidator::visit(VariableDeclaration &var)
        {
                map<unsigned, VariableDeclaration *> &used = used_locations[var.interface];
 
-               unsigned loc_count = 1;
-               if(var.array)
-                       if(const Literal *literal = dynamic_cast<const Literal *>(var.array_size.get()))
-                               if(literal->value.check_type<int>())
-                                       loc_count = literal->value.value<int>();
-
+               unsigned loc_count = LocationCounter().apply(var);
                for(unsigned i=0; i<loc_count; ++i)
                {
                        map<unsigned, VariableDeclaration *>::const_iterator j = used.find(location+i);
@@ -683,63 +767,109 @@ void GlobalInterfaceValidator::apply(Module &module)
        }
 }
 
-void GlobalInterfaceValidator::get_binding(const Layout &layout, unsigned &desc_set, int &binding)
+void GlobalInterfaceValidator::check_uniform(const Uniform &uni)
 {
-       for(vector<Layout::Qualifier>::const_iterator i=layout.qualifiers.begin(); i!=layout.qualifiers.end(); ++i)
+       map<std::string, const Uniform *>::const_iterator i = used_names.find(uni.name);
+       if(i!=used_names.end())
        {
-               if(i->name=="set")
-                       desc_set = i->value;
-               else if(i->name=="binding")
-                       binding = i->value;
+               if(uni.location>=0 && i->second->location>=0 && i->second->location!=uni.location)
+               {
+                       error(*uni.node, format("Mismatched location %d for uniform '%s'", uni.location, uni.name));
+                       add_info(*i->second->node, format("Previously declared here with location %d", i->second->location));
+               }
+               if(uni.bind_point>=0 && i->second->bind_point>=0 && i->second->bind_point!=uni.bind_point)
+               {
+                       error(*uni.node, format("Mismatched binding %d for uniform '%s'", uni.bind_point, uni.name));
+                       add_info(*i->second->node, format("Previously declared here with binding %d", i->second->bind_point));
+               }
+               if(uni.type && i->second->type && !TypeComparer().apply(*uni.type, *i->second->type))
+               {
+                       string type_name = (dynamic_cast<const StructDeclaration *>(uni.type) ?
+                               "structure" : format("type '%s'", uni.type->name));
+                       error(*uni.node, format("Mismatched %s for uniform '%s'", type_name, uni.name));
+
+                       string message = "Previously declared here";
+                       if(!dynamic_cast<const StructDeclaration *>(i->second->type))
+                               message += format(" with type '%s'", i->second->type->name);
+                       add_info(*i->second->node, message);
+               }
        }
-}
-
-void GlobalInterfaceValidator::check_binding(const Layout &layout, const Binding &binding)
-{
-       unsigned desc_set = 0;
-       int bind_point = -1;
-       get_binding(layout, desc_set, bind_point);
-       if(bind_point<0)
-               return;
+       else
+               used_names.insert(make_pair(uni.name, &uni));
 
-       map<unsigned, Binding> &used = used_bindings[desc_set];
-       map<unsigned, Binding>::const_iterator i = used.find(bind_point);
-       if(i!=used.end())
+       if(uni.location>=0)
        {
-               if(i->second.name!=binding.name)
+               map<unsigned, const Uniform *>::const_iterator j = used_locations.find(uni.location);
+               if(j!=used_locations.end())
                {
-                       error(*binding.node, format("Overlapping binding %d for '%s'", bind_point, binding.name));
-                       add_info(*i->second.node, format("Previously used here for '%s'", i->second.name));
+                       if(j->second->name!=uni.name)
+                       {
+                               error(*uni.node, format("Overlapping location %d for '%s'", uni.location, uni.name));
+                               add_info(*j->second->node, format("Previously used here for '%s'", j->second->name));
+                       }
                }
-               if(i->second.type && binding.type)
+               else
                {
-                       if(!is_same_type(*i->second.type, *binding.type))
+                       for(unsigned k=0; k<uni.loc_count; ++k)
+                               used_locations.insert(make_pair(uni.location+k, &uni));
+               }
+       }
+
+       if(uni.bind_point>=0)
+       {
+               map<unsigned, const Uniform *> &used = used_bindings[uni.desc_set];
+               map<unsigned, const Uniform *>::const_iterator j = used.find(uni.bind_point);
+               if(j!=used.end())
+               {
+                       if(j->second->name!=uni.name)
                        {
-                               string type_name = (dynamic_cast<const StructDeclaration *>(binding.type) ? "struct type" :
-                                       format("type '%s'", binding.type->name));
-                               error(*binding.node, format("Mismatched %s for binding %d '%s'", type_name, bind_point, binding.name));
-
-                               string message = "Previously used here";
-                               if(!dynamic_cast<const StructDeclaration *>(i->second.type))
-                                       message += format(" with type '%s'", i->second.type->name);
-                               add_info(*i->second.node, message);
+                               error(*uni.node, format("Overlapping binding %d for '%s'", uni.bind_point, uni.name));
+                               add_info(*j->second->node, format("Previously used here for '%s'", j->second->name));
                        }
                }
+               else
+                       used.insert(make_pair(uni.bind_point, &uni));
        }
-       else
-               used.insert(make_pair(bind_point, binding));
 }
 
 void GlobalInterfaceValidator::visit(VariableDeclaration &var)
 {
-       if(var.interface=="uniform" && var.layout)
-               check_binding(*var.layout, var);
+       if(var.interface=="uniform")
+       {
+               Uniform uni;
+               uni.node = &var;
+               uni.type = var.type_declaration;
+               uni.name = var.name;
+               if(var.layout)
+               {
+                       uni.location = get_layout_value(*var.layout, "location");
+                       uni.loc_count = LocationCounter().apply(var);
+                       uni.desc_set = get_layout_value(*var.layout, "set", 0);
+                       uni.bind_point = get_layout_value(*var.layout, "binding");
+               }
+
+               uniforms.push_back(uni);
+               check_uniform(uniforms.back());
+       }
 }
 
 void GlobalInterfaceValidator::visit(InterfaceBlock &iface)
 {
-       if(iface.interface=="uniform" && iface.layout)
-               check_binding(*iface.layout, iface);
+       if(iface.interface=="uniform")
+       {
+               Uniform uni;
+               uni.node = &iface;
+               uni.type = iface.struct_declaration;
+               uni.name = iface.block_name;
+               if(iface.layout)
+               {
+                       uni.desc_set = get_layout_value(*iface.layout, "set", 0);
+                       uni.bind_point = get_layout_value(*iface.layout, "binding");
+               }
+
+               uniforms.push_back(uni);
+               check_uniform(uniforms.back());
+       }
 }
 
 } // namespace SL