X-Git-Url: https://git.m6w6.name/?p=m6w6%2Fext-psi;a=blobdiff_plain;f=src%2Fcontext_validate.c;h=cf0695f0138ca19c34c9fd21088dd296295e7d46;hp=66b2a77f0b3a7ee2dcb2a6f0d49b7f0781ef1da8;hb=d3171526ab7658114cac4ebe1098af4b038e576e;hpb=6a459a08a40a2c243b0211ceb0cb263d29302627

diff --git a/src/context_validate.c b/src/context_validate.c
index 66b2a77..cf0695f 100644
--- a/src/context_validate.c
+++ b/src/context_validate.c
@@ -1,4 +1,4 @@
-	#ifdef HAVE_CONFIG_H
+#ifdef HAVE_CONFIG_H
 # include "config.h"
 #endif
 
@@ -28,13 +28,13 @@ static int validate_lib(PSI_Data *data, void **dlopened) {
 	} else if (!strchr(ptr, '/')) {
 		len = snprintf(lib, MAXPATHLEN, "lib%s.%s", ptr, PHP_PSI_SHLIB_SUFFIX);
 		if (MAXPATHLEN == len) {
-			data->error(NULL, PSI_WARNING, "Library name too long: '%s'", ptr);
+			data->error(data, NULL, PSI_WARNING, "Library name too long: '%s'", ptr);
 		}
 		lib[len] = 0;
 		ptr = lib;
 	}
 	if (!(*dlopened = dlopen(ptr, RTLD_LAZY|RTLD_LOCAL))) {
-		data->error(NULL, PSI_WARNING, "Could not open library '%s': %s.",
+		data->error(data, NULL, PSI_WARNING, "Could not open library '%s': %s.",
 				data->psi.file.ln, dlerror());
 		return 0;
 	}
@@ -48,10 +48,10 @@ static inline int locate_decl_type_alias(decl_typedefs *defs, decl_type *type) {
 	if (type->real) {
 		return 1;
 	}
-	for (i = 0; i < defs->count; ++i) {
-		decl_typedef *def = defs->list[i];
+	if (defs) for (i = 0; i < defs->count; ++i) {
+		decl_arg *def = defs->list[i];
 
-		if (def->type->type != type->type && !strcmp(def->alias, type->name)) {
+		if (def->type->type != type->type && !strcmp(def->var->name, type->name)) {
 			type->real = def->type;
 			return 1;
 		}
@@ -72,7 +72,7 @@ static inline int locate_decl_type_struct(decl_structs *structs, decl_type *type
 	if (type->strct) {
 		return 1;
 	}
-	for (i = 0; i < structs->count; ++i) {
+	if (structs) for (i = 0; i < structs->count; ++i) {
 		if (!strcmp(structs->list[i]->name, type->name)) {
 			type->strct = structs->list[i];
 			return 1;
@@ -81,13 +81,28 @@ static inline int locate_decl_type_struct(decl_structs *structs, decl_type *type
 	return 0;
 }
 
+static inline int locate_decl_type_union(decl_unions *unions, decl_type *type) {
+	size_t i;
+
+	if (type->unn) {
+		return 1;
+	}
+	if (unions) for (i = 0; i < unions->count; ++i) {
+		if (!strcmp(unions->list[i]->name, type->name)) {
+			type->unn = unions->list[i];
+			return 1;
+		}
+	}
+	return 0;
+}
+
 static inline int locate_decl_type_enum(decl_enums *enums, decl_type *type) {
 	size_t i;
 
 	if (type->enm) {
 		return 1;
 	}
-	for (i = 0; i < enums->count; ++i) {
+	if (enums) for (i = 0; i < enums->count; ++i) {
 		if (!strcmp(enums->list[i]->name, type->name)) {
 			type->enm = enums->list[i];
 			return 1;
@@ -96,6 +111,10 @@ static inline int locate_decl_type_enum(decl_enums *enums, decl_type *type) {
 	return 0;
 }
 
+static inline int validate_decl_struct(PSI_Data *data, decl_struct *s);
+static inline int validate_decl_union(PSI_Data *data, decl_union *u);
+static inline int validate_decl_enum(PSI_Data *data, decl_enum *e);
+
 static inline int validate_decl_type(PSI_Data *data, decl_type *type) {
 	switch (type->type) {
 	case PSI_T_CHAR:
@@ -103,7 +122,7 @@ static inline int validate_decl_type(PSI_Data *data, decl_type *type) {
 	case PSI_T_INT:
 	case PSI_T_LONG:
 	case PSI_T_NAME:
-		if (!data->defs || !locate_decl_type_alias(data->defs, type)) {
+		if (!locate_decl_type_alias(data->defs, type)) {
 			return 0;
 		}
 		if (type->real) {
@@ -111,25 +130,30 @@ static inline int validate_decl_type(PSI_Data *data, decl_type *type) {
 		}
 		return 1;
 	case PSI_T_STRUCT:
-		if (!data->structs || !locate_decl_type_struct(data->structs, type)) {
+		if (!locate_decl_type_struct(data->structs, type)) {
+			return 0;
+		}
+		break;
+	case PSI_T_UNION:
+		if (!locate_decl_type_union(data->unions, type)) {
 			return 0;
 		}
 		break;
 	case PSI_T_ENUM:
-		if (!data->enums || !locate_decl_type_enum(data->enums, type)) {
+		if (!locate_decl_type_enum(data->enums, type)) {
 			return 0;
 		}
 	}
 	return 1;
 }
-static inline int validate_decl_typedef(PSI_Data *data, decl_typedef *def) {
+static inline int validate_decl_typedef(PSI_Data *data, decl_arg *def) {
 	if (!validate_decl_type(data, def->type)) {
-		data->error(def->token, PSI_WARNING,
+		data->error(data, def->token, PSI_WARNING,
 			"Type '%s' cannot be aliased to %s'%s'",
-			def->type->name, def->type->type == PSI_T_STRUCT?"struct ":"",def->alias);
+			def->type->name, def->type->type == PSI_T_STRUCT?"struct ":"",
+			def->var->name);
 		return 0;
 	}
-	/* FIXME: check def->alias */
 	return 1;
 }
 
@@ -140,9 +164,9 @@ static inline int validate_constant(PSI_Data *data, constant *c) {
 
 static inline int validate_decl_arg(PSI_Data *data, decl_arg *arg) {
 	if (!validate_decl_type(data, arg->type)) {
-		data->error(arg->type->token, PSI_WARNING,
-			"Cannot use '%s'(%d) as type for decl var '%s'",
-			arg->type->name, arg->type->type, arg->var->name);
+		data->error(data, arg->type->token, PSI_WARNING,
+			"Cannot use '%s' as type for '%s'",
+			arg->type->name, arg->var->name);
 		return 0;
 	}
 	return 1;
@@ -172,18 +196,161 @@ static void psi_sort_struct_arg_swp(void *a, void *b) {
 	*_b = *_a;
 	*_a = _c;
 }
-static inline void psi_sort_struct_args(decl_struct *s) {
-	zend_insert_sort(s->args->args, s->args->count, sizeof(*s->args->args),
+static inline void psi_sort_struct_args(void **args, size_t count) {
+	zend_insert_sort(args, count, sizeof(*args),
 			psi_sort_struct_arg_cmp, psi_sort_struct_arg_swp);
 }
 
-static inline int validate_decl_struct(PSI_Data *data, decl_struct *s) {
-	size_t i;
+static inline int validate_decl_struct_darg(PSI_Data *data, decl_arg *darg, void *current) {
+	decl_type *real = real_decl_type(darg->type);
 
-	for (i = 0; i < s->args->count; ++i) {
-		if (!validate_decl_arg(data, s->args->args[i])) {
+	/* pre-validate any structs/unions/enums */
+	switch (real->type) {
+	case PSI_T_STRUCT:
+		if (current && current == real->strct) {
+			return 1;
+		}
+		if (!validate_decl_struct(data, real->strct)) {
+			return 0;
+		}
+		break;
+	case PSI_T_UNION:
+		if (current && current == real->unn) {
+			return 1;
+		}
+		if (!validate_decl_union(data, real->unn)) {
 			return 0;
 		}
+		break;
+	case PSI_T_ENUM:
+		if (current && current == real->enm) {
+			return 1;
+		}
+		if (!validate_decl_enum(data, real->enm)) {
+			return 0;
+		}
+		break;
+	}
+
+	return 1;
+}
+
+static inline size_t sizeof_decl_arg(decl_arg *darg) {
+	size_t size;
+	decl_type *real = real_decl_type(darg->type);
+
+	if (darg->var->array_size) {
+		if (darg->var->pointer_level > 2) {
+			size = psi_t_size(PSI_T_POINTER) * darg->var->array_size;
+		} else {
+			size = psi_t_size(real->type) * darg->var->array_size;
+		}
+	} else if (darg->var->pointer_level) {
+		size = psi_t_size(PSI_T_POINTER);
+	} else {
+		switch (real->type) {
+		case PSI_T_UNION:
+			size = real->unn->size;
+			break;
+		case PSI_T_STRUCT:
+			size = real->strct->size;
+			break;
+		case PSI_T_ENUM:
+		default:
+			size = psi_t_size(real->type);
+			break;
+		}
+	}
+
+	ZEND_ASSERT(size);
+
+	return size;
+}
+
+static inline size_t alignof_decl_type(decl_type *t);
+static inline size_t alignof_decl_arg(decl_arg *darg);
+static inline size_t alignof_decl_union(decl_union *u);
+static inline size_t alignof_decl_struct(decl_struct *s);
+
+static inline size_t alignof_decl_args(decl_args *args) {
+	size_t i, maxalign = 0;
+
+	for (i = 0; i < args->count; ++i) {
+		decl_arg *darg = args->args[i];
+		size_t align = alignof_decl_arg(darg);
+
+		if (align > maxalign) {
+			maxalign = align;
+		}
+	}
+
+	return maxalign;
+}
+
+static inline size_t alignof_decl_struct(decl_struct *s) {
+	if (!s->align) {
+		s->align = alignof_decl_args(s->args);
+	}
+	return s->align;
+}
+
+static inline size_t alignof_decl_union(decl_union *u) {
+	if (!u->align) {
+		u->align = alignof_decl_args(u->args);
+	}
+	return u->align;
+}
+
+static inline size_t alignof_decl_type(decl_type *t) {
+	decl_type *real = real_decl_type(t);
+	size_t align;
+
+	switch (real->type) {
+	case PSI_T_STRUCT:
+		align = alignof_decl_struct(real->strct);
+		break;
+	case PSI_T_UNION:
+		align = alignof_decl_union(real->unn);
+		break;
+	case PSI_T_ENUM:
+	default:
+		align = psi_t_alignment(real->type);
+	}
+
+	return align;
+}
+
+static inline size_t alignof_decl_arg(decl_arg *darg) {
+	size_t align;
+
+	if (darg->var->pointer_level && (!darg->var->array_size || darg->var->pointer_level > 2)) {
+		align = psi_t_alignment(PSI_T_POINTER);
+	} else {
+		align = alignof_decl_type(darg->type);
+	}
+
+	return align;
+}
+
+static inline size_t align_decl_arg(decl_arg *darg, size_t *pos, size_t *len) {
+	size_t align = alignof_decl_arg(darg);
+
+	ZEND_ASSERT(align);
+
+	*len = sizeof_decl_arg(darg);
+	*pos = psi_align(align, *pos);
+
+	return align;
+}
+
+static inline int validate_decl_struct(PSI_Data *data, decl_struct *s) {
+	size_t i, pos, len, size, align;
+
+	if (!s->size && !s->args->count) {
+		data->error(data, s->token, PSI_WARNING,
+				"Cannot compute size of empty struct %s",
+				s->name);
+		return 0;
 	}
 
 	for (i = 0; i < s->args->count; ++i) {
@@ -196,54 +363,117 @@ static inline int validate_decl_struct(PSI_Data *data, decl_struct *s) {
 		ZEND_ASSERT(!darg->var->arg || darg->var->arg == darg);
 		darg->var->arg = darg;
 
-		if (darg->layout) {
-			size_t size;
+		if (!validate_decl_struct_darg(data, darg, s)) {
+			return 0;
+		} else if (darg->layout) {
+			pos = darg->layout->pos;
+
+			align = align_decl_arg(darg, &pos, &len);
 
-			if (darg->var->array_size) {
-				size = psi_t_size(real_decl_type(darg->type)->type) * darg->var->array_size;
-			} else if (darg->var->pointer_level) {
-				size = psi_t_size(PSI_T_POINTER);
+			if (darg->layout->len != len) {
+				data->error(data, darg->token, PSI_WARNING,
+						"Computed size %zu of %s.%s does not match"
+						" pre-defined size %zu of type '%s'",
+						len, s->name, darg->var->name, darg->layout->len,
+						darg->type->name);
+			}
+			if (darg->layout->pos != pos) {
+				data->error(data, darg->token, PSI_WARNING,
+						"Computed offset %zu of %s.%s does not match"
+						" pre-defined offset %zu",
+						pos, s->name, darg->var->name, darg->layout->pos);
+			}
+		} else  {
+			if (i) {
+				pos = s->args->args[i-1]->layout->pos +
+						s->args->args[i-1]->layout->len;
 			} else {
-				decl_type *real = real_decl_type(darg->type);
+				pos = 0;
+			}
 
-				if (real->type == PSI_T_STRUCT) {
-					size = real->strct->size;
-				} else {
-					size = psi_t_size(real->type);
-				}
+			align = align_decl_arg(darg, &pos, &len);
+			darg->layout = init_decl_struct_layout(pos, len);
+		}
+
+		if (align > s->align) {
+			s->align = align;
+		}
+	}
+
+	psi_sort_struct_args((void **) s->args->args, s->args->count);
+
+	if (s->args->count) {
+		decl_arg *darg = s->args->args[s->args->count-1];
+
+		size = darg->layout->pos + darg->layout->len;
+		if (s->size < size) {
+			s->size = psi_align(size, s->align);
+		}
+	}
+
+	return 1;
+}
+
+static inline int validate_decl_union(PSI_Data *data, decl_union *u) {
+	size_t i, pos, len, size = 0, align;
+
+	if (!u->size && !u->args->count) {
+		data->error(data, u->token, PSI_WARNING,
+				"Cannot compute size of empty union %s",
+				u->name);
+		return 0;
+	}
+
+	for (i = 0; i < u->args->count; ++i) {
+		decl_arg *darg = u->args->args[i];
+
+		if (!validate_decl_arg(data, darg)) {
+			return 0;
+		}
+
+		ZEND_ASSERT(!darg->var->arg || darg->var->arg == darg);
+		darg->var->arg = darg;
+
+		if (!validate_decl_struct_darg(data, darg, u)) {
+			return 0;
+		} else if (darg->layout) {
+			pos = darg->layout->pos;
+
+			align = align_decl_arg(darg, &pos, &len);
+
+			if (darg->layout->pos != 0) {
+				data->error(data, darg->token, PSI_WARNING,
+						"Offset of %s.%s should be 0",
+						u->name, darg->var->name);
+				darg->layout->pos = 0;
 			}
-			if (darg->layout->len != size) {
-				data->error(darg->token, PSI_WARNING,
-						"Computed length %zu of %s.%s does not match"
-						" pre-defined length %zu of type '%s'",
-						darg->layout->len, s->name, darg->var->name, size,
+			if (darg->layout->len != len) {
+				data->error(data, darg->token, PSI_WARNING,
+						"Computed size %zu of %s.%s does not match"
+						" pre-defined size %zu of type '%s'",
+						len, u->name, darg->var->name, darg->layout->len,
 						darg->type->name);
-				return 0;
 			}
 		} else {
-			token_t t;
+			pos = 0;
 
-			if (darg->var->pointer_level && (!darg->var->array_size || darg->var->pointer_level == 1)) {
-				t = PSI_T_POINTER;
-			} else {
-				t = real_decl_type(darg->type)->type;
-			}
+			align = align_decl_arg(darg, &pos, &len);
+			darg->layout = init_decl_struct_layout(pos, len);
 
-			if (i) {
-				decl_arg *last = s->args->args[i-1];
-				darg->layout = init_decl_struct_layout(
-						psi_t_align(t, last->layout->pos + last->layout->len),
-						psi_t_size(t) * darg->var->array_size);
-			} else {
-				darg->layout = init_decl_struct_layout(0, psi_t_size(t));
-			}
 		}
-		if (s->size < darg->layout->pos + darg->layout->len) {
-			s->size = darg->layout->pos + darg->layout->len;
+		if (len > size) {
+			size = len;
+		}
+		if (align > u->align) {
+			u->align = align;
 		}
 	}
 
-	psi_sort_struct_args(s);
+	psi_sort_struct_args((void **) u->args->args, u->args->count);
+
+	if (u->size < size) {
+		u->size = psi_align(size, u->align);
+	}
 
 	return 1;
 }
@@ -271,7 +501,7 @@ static inline int validate_decl_func(PSI_Data *data, void *dl, decl *decl, decl_
 	struct psi_func_redir *redir;
 
 	if (!strcmp(func->var->name, "dlsym")) {
-		data->error(func->token, PSI_WARNING, "Cannot dlsym dlsym (sic!)");
+		data->error(data, func->token, PSI_WARNING, "Cannot dlsym dlsym (sic!)");
 		return 0;
 	}
 
@@ -289,9 +519,9 @@ static inline int validate_decl_func(PSI_Data *data, void *dl, decl *decl, decl_
 #endif
 		decl->call.sym = dlsym(dl ?: RTLD_NEXT, func->var->name);
 		if (!decl->call.sym) {
-			data->error(func->token, PSI_WARNING,
+			data->error(data, func->token, PSI_WARNING,
 				"Failed to locate symbol '%s': %s",
-				func->var->name, dlerror());
+				func->var->name, dlerror() ?: "not found");
 		}
 	}
 	return 1;
@@ -299,7 +529,7 @@ static inline int validate_decl_func(PSI_Data *data, void *dl, decl *decl, decl_
 
 static inline int validate_decl(PSI_Data *data, void *dl, decl *decl) {
 	if (!validate_decl_abi(data, decl->abi)) {
-		data->error(decl->abi->token, PSI_WARNING,
+		data->error(data, decl->abi->token, PSI_WARNING,
 				"Invalid calling convention: '%s'", decl->abi->token->text);
 		return 0;
 	}
@@ -408,7 +638,7 @@ static inline int validate_num_exp(PSI_Data *data, num_exp *exp, decl_args *darg
 	case PSI_T_NAME:
 		if (!locate_decl_var_arg(exp->u.dvar, dargs, func)) {
 			if (!locate_num_exp_enum_item(exp, data->enums) && !locate_num_exp_enum_item_ex(exp, enm)) {
-				data->error(exp->token, PSI_WARNING, "Unknown variable '%s' in numeric expression",
+				data->error(data, exp->token, PSI_WARNING, "Unknown variable '%s' in numeric expression",
 						exp->u.dvar->name);
 				return 0;
 			}
@@ -416,7 +646,7 @@ static inline int validate_num_exp(PSI_Data *data, num_exp *exp, decl_args *darg
 		return 1;
 	case PSI_T_NSNAME:
 		if (!locate_num_exp_constant(exp, data->consts)) {
-			data->error(exp->token, PSI_WARNING, "Unknown constant '%s' in numeric expression",
+			data->error(data, exp->token, PSI_WARNING, "Unknown constant '%s' in numeric expression",
 					exp->u.numb);
 			return 0;
 		}
@@ -433,7 +663,7 @@ static inline int validate_decl_enum(PSI_Data *data, decl_enum *e) {
 	size_t j;
 
 	if (!e->items || !e->items->count) {
-		data->error(e->token, PSI_WARNING, "Empty enum '%s'", e->name);
+		data->error(data, e->token, PSI_WARNING, "Empty enum '%s'", e->name);
 		return 0;
 	}
 
@@ -516,14 +746,14 @@ static inline int validate_set_value_ex(PSI_Data *data, set_value *set, decl_arg
 	decl_var *set_var = set->vars->vars[0];
 
 	if (!validate_set_value_handler(set)) {
-		data->error(set->func->token, PSI_WARNING, "Invalid cast '%s' in `set` statement", set->func->name);
+		data->error(data, set->func->token, PSI_WARNING, "Invalid cast '%s' in `set` statement", set->func->name);
 		return 0;
 	}
 
 	for (i = 0; i < set->vars->count; ++i) {
 		decl_var *svar = set->vars->vars[i];
 		if (!svar->arg && !locate_decl_var_arg(svar, ref_list, NULL)) {
-			data->error(svar->token, PSI_WARNING, "Unknown variable '%s' in `set` statement", svar->name);
+			data->error(data, svar->token, PSI_WARNING, "Unknown variable '%s' in `set` statement", svar->name);
 			return 0;
 		}
 	}
@@ -538,7 +768,7 @@ static inline int validate_set_value_ex(PSI_Data *data, set_value *set, decl_arg
 		int is_pointer_to_struct = (ref_type->type == PSI_T_STRUCT && ref->var->pointer_level);
 
 		if (!is_to_array && !is_pointer_to_struct) {
-			data->error(set->func->token, E_WARNING, "Inner `set` statement casts only work with "
+			data->error(data, set->func->token, E_WARNING, "Inner `set` statement casts only work with "
 					"to_array() casts on structs or pointers: %s(%s...", set->func->name, set->vars->vars[0]->name);
 			return 0;
 		}
@@ -570,7 +800,7 @@ static inline int validate_set_value_ex(PSI_Data *data, set_value *set, decl_arg
 
 		if (sub_ref) {
 			if (strcmp(sub_var->name, set_var->name)) {
-				data->error(sub_var->token, E_WARNING, "Inner `set` statement casts on pointers must reference the same variable");
+				data->error(data, sub_var->token, E_WARNING, "Inner `set` statement casts on pointers must reference the same variable");
 				return 0;
 			}
 			if (!validate_set_value_ex(data, set->inner[0], sub_ref, ref_list)) {
@@ -578,7 +808,7 @@ static inline int validate_set_value_ex(PSI_Data *data, set_value *set, decl_arg
 			}
 		}
 	} else if (set->count > 1) {
-		data->error(set->func->token, E_WARNING, "Inner `set` statement casts on pointers may only occur once");
+		data->error(data, set->func->token, E_WARNING, "Inner `set` statement casts on pointers may only occur once");
 		return 0;
 	}
 
@@ -620,12 +850,12 @@ static inline int validate_impl_ret_stmt(PSI_Data *data, impl *impl) {
 	/* and which type cast to apply */
 	if (impl->stmts->ret.count != 1) {
 		if (impl->stmts->ret.count > 1) {
-			data->error(impl->stmts->ret.list[1]->token, PSI_WARNING,
+			data->error(data, impl->stmts->ret.list[1]->token, PSI_WARNING,
 					"Too many `return` statements for implmentation %s;"
 					" found %zu, exactly one is needed",
 					impl->func->name, impl->stmts->ret.count);
 		} else {
-			data->error(impl->func->token, PSI_WARNING,
+			data->error(data, impl->func->token, PSI_WARNING,
 					"Missing `return` statement for implementation %s",
 					impl->func->name);
 		}
@@ -635,7 +865,7 @@ static inline int validate_impl_ret_stmt(PSI_Data *data, impl *impl) {
 	ret = impl->stmts->ret.list[0];
 
 	if (!(impl->decl = locate_impl_decl(data->decls, ret))) {
-		data->error(ret->token, PSI_WARNING,
+		data->error(data, ret->token, PSI_WARNING,
 				"Missing declaration '%s' for `return` statment for implementation %s",
 				ret->set->vars->vars[0]->name, impl->func->name);
 		return 0;
@@ -667,7 +897,7 @@ static inline int validate_impl_let_stmts(PSI_Data *data, impl *impl) {
 		}
 
 		if (!locate_decl_var_arg(let_var, impl->decl->args, impl->decl->func)) {
-			data->error(let_var->token, PSI_WARNING, "Unknown variable '%s' in `let` statement"
+			data->error(data, let_var->token, PSI_WARNING, "Unknown variable '%s' in `let` statement"
 					" of implementation '%s'", let_var->name, impl->func->name);
 			return 0;
 		}
@@ -714,7 +944,7 @@ static inline int validate_impl_let_stmts(PSI_Data *data, impl *impl) {
 				}
 			}
 			if (!check) {
-				data->error(let->var->token, PSI_WARNING, "Unknown value '$%s' of `let` statement"
+				data->error(data, let->var->token, PSI_WARNING, "Unknown value '$%s' of `let` statement"
 						" for variable '%s' of implementation '%s'",
 						let->val->data.func->var->name, let->var->name, impl->func->name);
 				return 0;
@@ -738,7 +968,7 @@ static inline int validate_impl_let_stmts(PSI_Data *data, impl *impl) {
 			}
 		}
 		if (!check) {
-			data->error(impl->func->token, PSI_WARNING,
+			data->error(data, impl->func->token, PSI_WARNING,
 					"Missing `let` statement for arg '%s %.*s%s'"
 					" of declaration '%s' for implementation '%s'",
 					darg->type->name, (int) darg->var->pointer_level, "*****",
@@ -767,7 +997,7 @@ static inline int validate_impl_set_stmts(PSI_Data *data, impl *impl) {
 			}
 		}
 		if (!check) {
-			data->error(set->var->token, PSI_WARNING, "Unknown variable '$%s' of `set` statement"
+			data->error(data, set->var->token, PSI_WARNING, "Unknown variable '$%s' of `set` statement"
 					" of implementation '%s'",
 					set->var->name, impl->func->name);
 			return 0;
@@ -810,7 +1040,7 @@ static inline int validate_impl_set_stmts(PSI_Data *data, impl *impl) {
 			}
 
 			if (!check) {
-				data->error(set_var->token, PSI_WARNING, "Unknown value '%s' of `set` statement"
+				data->error(data, set_var->token, PSI_WARNING, "Unknown value '%s' of `set` statement"
 						" for variable '$%s' of implementation '%s'",
 						set_var->name, set->arg->var->name, impl->func->name);
 				return 0;
@@ -844,7 +1074,7 @@ static inline int validate_impl_free_stmts(PSI_Data *data, impl *impl) {
 
 			/* first find the decl of the free func */
 			if (!locate_free_decl(data->decls, free_call)) {
-				data->error(free_call->token, PSI_WARNING,
+				data->error(data, free_call->token, PSI_WARNING,
 						"Missing declaration '%s' in `free` statement"
 						" of implementation '%s'",
 						free_call->func, impl->func->name);
@@ -874,7 +1104,7 @@ static inline int validate_impl_free_stmts(PSI_Data *data, impl *impl) {
 				}
 
 				if (!check) {
-					data->error(free_var->token, PSI_WARNING,
+					data->error(data, free_var->token, PSI_WARNING,
 							"Unknown variable '%s' of `free` statement"
 							" of implementation '%s'",
 							free_var->name, impl->func->name);
@@ -887,7 +1117,7 @@ static inline int validate_impl_free_stmts(PSI_Data *data, impl *impl) {
 }
 static inline int validate_impl_stmts(PSI_Data *data, impl *impl) {
 	if (!impl->stmts) {
- 		data->error(impl->func->token, PSI_WARNING,
+ 		data->error(data, impl->func->token, PSI_WARNING,
  				"Missing body for implementation %s!",
  				impl->func->name);
  		return 0;
@@ -920,7 +1150,7 @@ static inline int validate_impl_args(PSI_Data *data, impl *impl) {
 		if (iarg->def) {
 			def = 1;
 		} else if (def) {
-			data->error(impl->func->token, PSI_WARNING,
+			data->error(data, impl->func->token, PSI_WARNING,
 					"Non-optional argument %zu '$%s' of implementation '%s'"
 					" follows optional argument",
 					i+1, iarg->var->name, impl->func->name);
@@ -930,6 +1160,7 @@ static inline int validate_impl_args(PSI_Data *data, impl *impl) {
 
 	return 1;
 }
+
 static inline int validate_impl(PSI_Data *data, impl *impl) {
 	if (!validate_impl_args(data, impl)) {
 		return 0;
@@ -942,41 +1173,79 @@ int PSI_ContextValidate(PSI_Context *C, PSI_Parser *P)
 {
 	PSI_Data *D;
 	void *dlopened = NULL;
-	size_t count = C->count++;
+	size_t i, count = C->count++, check_round, check_count;
+	decl_typedefs *check_defs = P->defs;
+	decl_structs *check_structs = P->structs;
+	decl_unions *check_unions = P->unions;
+	decl_enums *check_enums = P->enums;
+	unsigned silent = C->flags & PSI_PARSER_SILENT;
 
 	C->data = realloc(C->data, C->count * sizeof(*C->data));
 	D = PSI_DataExchange(&C->data[count], PSI_DATA(P));
 
-	if (D->defs) {
-		size_t i;
-
-		for (i = 0; i < D->defs->count; ++i) {
-			if (validate_decl_typedef(PSI_DATA(C), D->defs->list[i])) {
-				C->defs = add_decl_typedef(C->defs, D->defs->list[i]);
+#define REVALIDATE(what) do { \
+		if (check_round && check_ ##what) { \
+			free(check_ ##what->list); \
+			free(check_ ##what); \
+		} \
+		check_ ##what = recheck_ ##what; \
+} while (0)
+#define CHECK_TOTAL (CHECK_COUNT(defs) + CHECK_COUNT(structs) + CHECK_COUNT(enums))
+#define CHECK_COUNT(of) (check_ ##of ? check_ ##of->count : 0)
+
+	if (!silent) {
+		/* no warnings on first round */
+		C->flags |= PSI_PARSER_SILENT;
+	}
+	for (check_round = 0, check_count = 0; CHECK_TOTAL && check_count != CHECK_TOTAL; ++check_round) {
+		decl_typedefs *recheck_defs = NULL;
+		decl_structs *recheck_structs = NULL;
+		decl_unions *recheck_unions = NULL;
+		decl_enums *recheck_enums = NULL;
+
+		check_count = CHECK_TOTAL;
+
+		for (i = 0; i < CHECK_COUNT(defs); ++i) {
+			if (validate_decl_typedef(PSI_DATA(C), check_defs->list[i])) {
+				C->defs = add_decl_typedef(C->defs, check_defs->list[i]);
+			} else {
+				recheck_defs = add_decl_typedef(recheck_defs, check_defs->list[i]);
 			}
 		}
-	}
-	if (D->structs) {
-		size_t i;
-
-		for (i = 0; i < D->structs->count; ++i) {
-			if (validate_decl_struct(PSI_DATA(C), D->structs->list[i])) {
-				C->structs = add_decl_struct(C->structs, D->structs->list[i]);
+		for (i = 0; i < CHECK_COUNT(structs); ++i) {
+			if (validate_decl_struct(PSI_DATA(C), check_structs->list[i])) {
+				C->structs = add_decl_struct(C->structs, check_structs->list[i]);
+			} else {
+				recheck_structs = add_decl_struct(recheck_structs, check_structs->list[i]);
 			}
 		}
-	}
-	if (D->enums) {
-		size_t i;
-
-		for (i = 0; i < D->enums->count; ++i) {
-			if (validate_decl_enum(PSI_DATA(C), D->enums->list[i])) {
-				C->enums = add_decl_enum(C->enums, D->enums->list[i]);
+		for (i = 0; i < CHECK_COUNT(unions); ++i) {
+			if (validate_decl_union(PSI_DATA(C), check_unions->list[i])) {
+				C->unions = add_decl_union(C->unions, check_unions->list[i]);
+			} else {
+				recheck_unions = add_decl_union(recheck_unions, check_unions->list[i]);
 			}
 		}
+		for (i = 0; i < CHECK_COUNT(enums); ++i) {
+			if (validate_decl_enum(PSI_DATA(C), check_enums->list[i])) {
+				C->enums = add_decl_enum(C->enums, check_enums->list[i]);
+			} else {
+				recheck_enums = add_decl_enum(recheck_enums, check_enums->list[i]);
+			}
+		}
+
+		REVALIDATE(defs);
+		REVALIDATE(structs);
+		REVALIDATE(unions);
+		REVALIDATE(enums);
+
+		if (check_round == 0 && !silent) {
+			C->flags &= ~PSI_PARSER_SILENT;
+		}
 	}
-	if (D->consts) {
-		size_t i;
 
+
+	if (D->consts) {
 		for (i = 0; i < D->consts->count; ++i) {
 			if (validate_constant(PSI_DATA(C), D->consts->list[i])) {
 				C->consts = add_constant(C->consts, D->consts->list[i]);
@@ -991,8 +1260,6 @@ int PSI_ContextValidate(PSI_Context *C, PSI_Parser *P)
 	add_decl_lib(&C->psi.libs, dlopened);
 
 	if (D->decls) {
-		size_t i;
-
 		for (i = 0; i < D->decls->count; ++i) {
 			if (validate_decl(PSI_DATA(C), dlopened, D->decls->list[i])) {
 				C->decls = add_decl(C->decls, D->decls->list[i]);
@@ -1000,8 +1267,6 @@ int PSI_ContextValidate(PSI_Context *C, PSI_Parser *P)
 		}
 	}
 	if (D->impls) {
-		size_t i;
-
 		for (i = 0; i < D->impls->count; ++i) {
 			if (validate_impl(PSI_DATA(C), D->impls->list[i])) {
 				C->impls = add_impl(C->impls, D->impls->list[i]);
@@ -1018,7 +1283,7 @@ int PSI_ContextValidateData(PSI_Data *dest, PSI_Data *source)
 	int errors = 0;
 
 	if (source->defs) for (i = 0; i < source->defs->count; ++i) {
-		decl_typedef *def = source->defs->list[i];
+		decl_arg *def = source->defs->list[i];
 
 		if (validate_decl_typedef(source, def)) {
 			if (dest) {
@@ -1053,6 +1318,18 @@ int PSI_ContextValidateData(PSI_Data *dest, PSI_Data *source)
 		}
 	}
 
+	if (source->unions) for (i = 0; i < source->unions->count; ++i) {
+		decl_union *dunion = source->unions->list[i];
+
+		if (validate_decl_union(source, dunion)) {
+			if (dest) {
+				dest->unions = add_decl_union(dest->unions, dunion);
+			}
+		} else {
+			++errors;
+		}
+	}
+
 	if (source->enums) for (i = 0; i < source->enums->count; ++i) {
 		decl_enum *denum = source->enums->list[i];