ctf visitor generate I/O struct: visit typedef/typealias
[babeltrace.git] / formats / ctf / metadata / ctf-visitor-generate-io-struct.c
index 3bd4238c8ef4a18a6c67d4e7b159ff48a8ec5218..7e2dc07268d4a7917c3b78b226d4846a560c70b9 100644 (file)
 #include <inttypes.h>
 #include <errno.h>
 #include <babeltrace/list.h>
+#include <uuid/uuid.h>
 #include "ctf-scanner.h"
 #include "ctf-parser.h"
 #include "ctf-ast.h"
 
 #define fprintf_dbg(fd, fmt, args...)  fprintf(fd, "%s: " fmt, __func__, ## args)
 
+#define _cds_list_first_entry(ptr, type, member)       \
+       cds_list_entry((ptr)->next, type, member)
+
+static
+struct declaration *ctf_declaration_specifier_visit(FILE *fd,
+               int depth, struct list_head *head,
+               struct declaration_scope *declaration_scope);
 
 static
 int ctf_visitor_print_type_specifier(FILE *fd, int depth, struct ctf_node *node)
@@ -70,7 +78,10 @@ int ctf_visitor_print_type_specifier(FILE *fd, int depth, struct ctf_node *node)
                fprintf(fd, "bool");
                break;
        case TYPESPEC_COMPLEX:
-               fprintf(fd, "complex");
+               fprintf(fd, "_Complex");
+               break;
+       case TYPESPEC_IMAGINARY:
+               fprintf(fd, "_Imaginary");
                break;
        case TYPESPEC_CONST:
                fprintf(fd, "const");
@@ -173,24 +184,76 @@ int ctf_visitor_print_type_declarator(FILE *fd, int depth, struct ctf_node *node
 }
 
 /*
- * String returned must be freed by the caller.
+ * String returned must be freed by the caller using g_free.
  */
 static
 char *concatenate_unary_strings(struct list_head *head)
 {
-
+       struct ctf_node *node;
+       GString *str;
+       int i = 0;
+
+       str = g_string_new();
+       cds_list_for_each_entry(node, head, siblings) {
+               char *src_string;
+
+               assert(node->type == NODE_UNARY_EXPRESSION);
+               assert(node->u.unary_expression.type == UNARY_STRING);
+               assert((node->u.unary_expression.link == UNARY_LINK_UNKNOWN)
+                       ^ (i != 0))
+               switch (node->u.unary_expression.link) {
+               case UNARY_DOTLINK:
+                       g_string_append(str, ".")
+                       break;
+               case UNARY_ARROWLINK:
+                       g_string_append(str, "->")
+                       break;
+               case UNARY_DOTDOTDOT:
+                       g_string_append(str, "...")
+                       break;
+               }
+               src_string = u.unary_expression.u.string;
+               g_string_append(str, src_string);
+               i++;
+       }
+       return g_string_free(str, FALSE);
 }
 
 static
 int get_unary_unsigned(struct list_head *head, uint64_t *value)
 {
-
+       struct ctf_node *node;
+       int i = 0;
+
+       cds_list_for_each_entry(node, head, siblings) {
+               assert(node->type == NODE_UNARY_EXPRESSION);
+               assert(node->u.unary_expression.type == UNARY_UNSIGNED_CONSTANT);
+               assert(node->u.unary_expression.link == UNARY_LINK_UNKNOWN);
+               assert(i == 0);
+               *value = node->u.unary_expression.unsigned_constant
+               i++;
+       }
+       return 0;
 }
 
 static
 int get_unary_uuid(struct list_head *head, uuid_t *uuid)
 {
-
+       struct ctf_node *node;
+       int i = 0;
+       int ret = -1;
+
+       cds_list_for_each_entry(node, head, siblings) {
+               const char *src_string;
+
+               assert(node->type == NODE_UNARY_EXPRESSION);
+               assert(node->u.unary_expression.type == UNARY_STRING);
+               assert(node->u.unary_expression.link == UNARY_LINK_UNKNOWN);
+               assert(i == 0);
+               src_string = u.unary_expression.u.string;
+               ret = uuid_parse(u.unary_expression.u.string, *uuid);
+       }
+       return ret;
 }
 
 static
@@ -202,36 +265,449 @@ struct ctf_stream *trace_stream_lookup(struct ctf_trace *trace, uint64_t stream_
 }
 
 static
-struct ctf_declaration *ctf_declaration_specifier_visit(FILE *fd,
-                                       int depth, struct list_head *head,
-                                       struct type_scope *type_scope,
-                                       struct declaration_scope *declaration_scope)
+struct declaration *ctf_type_declarator_visit(int fd, int depth,
+       struct cds_list_head *declaration_specifier,
+       GQuark *field_name,
+       struct ctf_node *node_type_declarator,
+       struct declaration_scope *declaration_scope
+       struct declaration *nested_declaration)
+{
+       /*
+        * Visit type declarator by first taking care of sequence/array
+        * (recursively). Then, when we get to the identifier, take care
+        * of pointers.
+        */
+
+       assert(node_type_declarator->u.type_declarator.type != TYPEDEC_UNKNOWN);
+       /* TODO: gcc bitfields not supported yet. */
+       assert(node_type_declarator->u.type_declarator.bitfield_len == NULL);
+
+       if (!nested_declaration) {
+               if (!cds_list_empty(&node_type_declarator->u.type_declarator.pointers)) {
+                       /*
+                        * If we have a pointer declarator, it _has_ to be present in
+                        * the typealiases (else fail).
+                        */
+                       nested_declaration = ... ;
+               } else {
+                       nested_declaration = /* parse declaration_specifier */;
+               }
+
+       }
+
+       if (node_type_declarator->u.type_declarator.type == TYPEDEC_ID) {
+               if (node_type_declarator->u.type_declarator.u.id)
+                       *field_name = g_quark_from_string(node_type_declarator->u.type_declarator.u.id);
+               else
+                       *field_name = 0;
+               return nested_declaration;
+       } else {
+               struct declaration *declaration;
+               struct node *length;
+
+               /* TYPEDEC_NESTED */
+
+               /* create array/sequence, pass nested_declaration as child. */
+               length = node_type_declarator->u.type_declarator.u.nested.length;
+               if (length) {
+                       switch (length->type) {
+                       case NODE_UNARY_EXPRESSION:
+                               /* Array */
+                               declaration = /* create array */;
+                               break;
+                       case NODE_TYPE_SPECIFIER:
+                               /* Sequence */
+                               declaration = /* create sequence */;
+                               break;
+                       default:
+                               assert(0);
+                       }
+               }
+
+               /* Pass it as content of outer container */
+               declaration = ctf_type_declarator_visit(fd, depth,
+                               declaration_specifier, field_name,
+                               node_type_declarator->u.type_declarator.u.nested.type_declarator,
+                               declaration_scope, declaration);
+               return declaration;
+       }
+}
+
+static
+int ctf_struct_type_declarators_visit(int fd, int depth,
+       struct declaration_struct *struct_declaration,
+       struct cds_list_head *declaration_specifier,
+       struct cds_list_head *type_declarators,
+       struct declaration_scope *declaration_scope)
+{
+       struct ctf_node *iter;
+       GQuark field_name;
+
+       cds_list_for_each_entry(iter, type_declarators, siblings) {
+               struct declaration *field_declaration;
+
+               field_declaration = ctf_type_declarator_visit(fd, depth,
+                                               declaration_specifier,
+                                               &field_name, iter,
+                                               struct_declaration->scope,
+                                               NULL);
+               struct_declaration_add_field(struct_declaration,
+                                            g_quark_to_string(field_name),
+                                            field_declaration);
+       }
+
+       return 0;
+}
+
+static
+int ctf_typedef_visit(int fd, int depth, struct declaration_scope *scope,
+               struct cds_list_head *declaration_specifier,
+               struct cds_list_head *type_declarators)
+{
+       struct ctf_node *iter;
+       GQuark identifier;
+
+       cds_list_for_each_entry(iter, type_declarators, siblings) {
+               struct declaration *type_declaration;
+               int ret;
+       
+               type_declaration = ctf_type_declarator_visit(fd, depth,
+                                       declaration_specifier,
+                                       &identifier, iter,
+                                       scope, NULL);
+               ret = register_declaration(identifier, type_declaration, scope);
+               if (ret) {
+                       type_declaration->declaration_free(type_declaration);
+                       return ret;
+               }
+       }
+       return 0;
+}
+
+static
+int ctf_typealias_visit(int fd, int depth, struct declaration_scope *scope,
+               struct ctf_node *target, struct ctf_node *alias)
+{
+       struct declaration *type_declaration;
+       struct ctf_node *iter, *node;
+       GQuark identifier, dummy_id;
+       GString *str;
+       const char *str_c;
+       GQuark alias_q;
+       int alias_item_nr = 0;
+
+       /* See ctf_visitor_type_declarator() in the semantic validator. */
+
+       /*
+        * Create target type declaration.
+        */
+
+       type_declaration = ctf_type_declarator_visit(fd, depth,
+               &target->u.typealias_target.declaration_specifier,
+               &dummy_id, &target->u.typealias_target.type_declarators,
+               scope, NULL);
+       if (!type_declaration) {
+               fprintf(stderr, "[error] %s: problem creating type declaration\n", __func__);
+               err = -EINVAL;
+               goto error;
+       }
+       /*
+        * The semantic validator does not check whether the target is
+        * abstract or not (if it has an identifier). Check it here.
+        */
+       if (dummy_id != 0) {
+               fprintf(stderr, "[error] %s: expecting empty identifier\n", __func__);
+               err = -EINVAL;
+               goto error;
+       }
+       /*
+        * Create alias identifier.
+        */
+       str = g_string_new();
+       cds_list_for_each_entry(iter, &alias->u.typealias_alias.declaration_specifier, siblings) {
+               if (alias_item_nr != 0)
+                       g_string_append(str, " ");
+               alias_item_nr++;
+
+               switch (iter->type) {
+               case NODE_TYPE_SPECIFIER:
+                       switch (iter->u.type_specifier.type) {
+                       case TYPESPEC_VOID:
+                               g_string_append(str, "void");
+                               break;
+                       case TYPESPEC_CHAR:
+                               g_string_append(str, "char");
+                               break;
+                       case TYPESPEC_SHORT:
+                               g_string_append(str, "short");
+                               break;
+                       case TYPESPEC_INT:
+                               g_string_append(str, "int");
+                               break;
+                       case TYPESPEC_LONG:
+                               g_string_append(str, "long");
+                               break;
+                       case TYPESPEC_FLOAT:
+                               g_string_append(str, "float");
+                               break;
+                       case TYPESPEC_DOUBLE:
+                               g_string_append(str, "double");
+                               break;
+                       case TYPESPEC_SIGNED:
+                               g_string_append(str, "signed");
+                               break;
+                       case TYPESPEC_UNSIGNED:
+                               g_string_append(str, "unsigned");
+                               break;
+                       case TYPESPEC_BOOL:
+                               g_string_append(str, "bool");
+                               break;
+                       case TYPESPEC_COMPLEX:
+                               g_string_append(str, "_Complex");
+                               break;
+                       case TYPESPEC_IMAGINARY:
+                               g_string_append(str, "_Imaginary");
+                               break;
+                       case TYPESPEC_CONST:
+                               g_string_append(str, "const");
+                               break;
+                       case TYPESPEC_ID_TYPE:
+                               if (!iter->u.type_specifier.id_type) {
+                                       fprintf(stderr, "[error] %s: unexpected empty ID\n", __func__);
+                                       err = -EINVAL;
+                                       goto error;
+                               }
+                               g_string_append(str, iter->u.type_specifier.id_type);
+                               break;
+                       default:
+                               fprintf(stderr, "[error] %s: unknown specifier\n", __func__);
+                               err = -EINVAL;
+                               goto error;
+                       }
+                       break;
+               case NODE_ENUM:
+                       if (!iter->u._enum.enum_id) {
+                               fprintf(stderr, "[error] %s: unexpected empty enum ID\n", __func__);
+                               err = -EINVAL;
+                               goto error;
+                       }
+                       g_string_append(str, "enum ");
+                       g_string_append(str, iter->u._enum.enum_id);
+                       break;
+               case NODE_VARIANT:
+                       if (!iter->u.variant.name) {
+                               fprintf(stderr, "[error] %s: unexpected empty variant name\n", __func__);
+                               err = -EINVAL;
+                               goto error;
+                       }
+                       g_string_append(str, "variant ");
+                       g_string_append(str, iter->u.variant.name);
+                       break;
+               case NODE_STRUCT:
+                       if (!iter->u._struct.name) {
+                               fprintf(stderr, "[error] %s: unexpected empty variant name\n", __func__);
+                               err = -EINVAL;
+                               goto error;
+                       }
+                       g_string_append(str, "struct ");
+                       g_string_append(str, iter->u._struct.name);
+                       break;
+               default:
+                       fprintf(stderr, "[error] %s: unexpected node type %d\n", __func__, (int) iter->type);
+                       err = -EINVAL;
+                       goto error;
+               }
+       }
+
+       node = _cds_list_first_entry(&alias->u.typealias_alias.type_declarators,
+                               struct node, siblings) {
+               cds_list_for_each_entry(iter, &node->u.type_declarator.pointers, siblings) {
+                       g_string_append(str, " *");
+                       if (iter->u.pointer.const_qualifier)
+                               g_string_append(str, " const");
+               }
+
+       }
+       str_c = g_string_free(str, FALSE);
+       alias_q = g_quark_from_string(str_c);
+       g_free(str_c);
+       ret = register_declaration(alias_q, type_declaration, scope);
+       if (ret)
+               goto error;
+       return 0;
+
+error:
+       type_declaration->declaration_free(type_declaration);
+       return ret;
+}
+
+static
+int ctf_struct_declaration_list_visit(int fd, int depth,
+       struct ctf_node *iter, struct declaration_struct *struct_declaration)
 {
+       struct declaration *declaration;
+       int ret;
 
+       switch (iter->type) {
+       case NODE_TYPEDEF:
+               /* For each declarator, declare type and add type to struct declaration scope */
+               ret = ctf_typedef_visit(fd, depth,
+                       struct_declaration->scope,
+                       &iter->u._typedef.declaration_specifier,
+                       &iter->u._typedef.type_declarators);
+               if (ret)
+                       return ret;
+               break;
+       case NODE_TYPEALIAS:
+               /* Declare type with declarator and add type to struct declaration scope */
+               ret = ctf_typealias_visit(fd, depth,
+                       struct_declaration->scope,
+                       iter->u.typealias.target,
+                       iter->u.typealias.alias);
+               if (ret)
+                       return ret;
+               break;
+       case NODE_STRUCT_OR_VARIANT_DECLARATION:
+               /* Add field to structure declaration */
+               ret = ctf_struct_type_declarators_visit(fd, depth,
+                               struct_declaration,
+                               &iter->u.struct_or_variant_declaration.declaration_specifier,
+                               &iter->u.struct_or_variant_declaration.type_declarators);
+               if (ret)
+                       return ret;
+               break;
+       default:
+               fprintf(stderr, "[error] %s: unexpected node type %d\n", __func__, (int) iter->type);
+               assert(0);
+       }
+       return 0;
+}
+
+static
+struct declaration_struct *ctf_declaration_struct_visit(FILE *fd,
+       int depth, const char *name, struct cds_list_head *declaration_list,
+       int has_body, struct declaration_scope *declaration_scope)
+{
+       struct declaration *declaration;
+       struct declaration_struct *struct_declaration;
+       struct ctf_node *iter;
+
+       /*
+        * For named struct (without body), lookup in
+        * declaration scope. Don't take reference on struct
+        * declaration: ref is only taken upon definition.
+        */
+       if (!has_body) {
+               assert(name);
+               struct_declaration =
+                       lookup_struct_declaration(g_quark_from_string(name),
+                                                 declaration_scope);
+               return struct_declaration;
+       } else {
+               /* For unnamed struct, create type */
+               /* For named struct (with body), create type and add to declaration scope */
+               if (name) {
+                       if (lookup_struct_declaration(g_quark_from_string(name),
+                                                     declaration_scope)) {
+                               
+                               fprintf(stderr, "[error] %s: struct %s already declared in scope\n", name);
+                               return NULL;
+                       }
+               }
+               struct_declaration = struct_declaration_new(name, declaration_scope);
+               cds_list_for_each_entry(iter, declaration_list, siblings) {
+                       ret = ctf_struct_declaration_list_visit(fd,
+depth + 1, iter, struct_declaration);
+                       if (ret)
+                               goto error;
+               }
+               if (name) {
+                       ret = register_struct_declaration(g_quark_from_string(name),
+                                       struct_declaration,
+                                       declaration_scope);
+                       assert(!ret);
+               }
+               return struct_declaration;
+       }
+error:
+       struct_declaration->p.declaration_free(&struct_declaration->p);
+       return NULL;
 }
 
 /*
- * Use declaration specifier visitor, and add resulting variant, struct
- * or enum to the current type scope.
+ * Also add named variant, struct or enum to the current declaration scope.
  */
 static
-int ctf_type_specifier_visit(FILE *fd,
-                       int depth, struct list_head *head,
-                       struct type_scope *type_scope,
-                       struct declaration_scope *declaration_scope)
+struct declaration *ctf_declaration_specifier_visit(FILE *fd,
+               int depth, struct list_head *head,
+               struct declaration_scope *declaration_scope)
 {
+       struct declaration *declaration;
+       struct node *first;
 
+       first = _cds_list_first_entry(head, struct node, siblings);
+
+       switch (first->type) {
+       case NODE_STRUCT:
+               return ctf_declaration_struct_visit(fd, depth,
+                       first->u._struct.name,
+                       &first->u._struct.declaration_list,
+                       first->u._struct.has_body,
+                       declaration_scope);
+               break;
+       case NODE_VARIANT:
+               /*
+                * For named variant (without body), lookup in
+                * declaration scope and create declaration copy.
+                */
+               /* For named variant (with body), create type and add to declaration scope */
+               /* For unnamed variant, create type */
+               /* If variant has a tag field specifier, assign tag name. */
+               break;
+       case NODE_ENUM:
+               /*
+                * For named enum (without body), lookup in declaration
+                * scope and create declaration copy.
+                */
+               /* For named enum (with body), create type and add to declaration scope */
+               /* For unnamed enum, create type */
+               /* Enumerations need to have their size/type specifier (< >). */
+               break;
+       case NODE_INTEGER:
+               /*
+                * Create an integer declaration.
+                */
+               break;
+       case NODE_FLOATING_POINT:
+               /*
+                * Create a floating point declaration.
+                */
+               break;
+       case NODE_STRING:
+               /*
+                * Create a string declaration.
+                */
+               break;
+       case NODE_TYPE_SPECIFIER:
+               /*
+                * Lookup named type in typedef declarations (in
+                * declaration scope). Create a copy of the declaration.
+                */
+               break;
+
+       }
 }
 
 static
 int ctf_typedef_declarator_visit(FILE *fd, int depth,
-                               struct list_head *declaration_specifier,
-                               struct node *type_declarator, struct type_scope *type_scope,
-                               struct declaration_scope *declaration_scope)
+               struct list_head *declaration_specifier,
+               struct node *type_declarator,
+               struct declaration_scope *declaration_scope)
 {
        /*
-        * Build the type using declaration specifier, then apply type
-        * declarator, add the resulting type to the current type scope.
+        * Build the type using declaration specifier (creating
+        * declaration from type_specifier), then apply type declarator,
+        * add the resulting type to the current declaration scope.
         */
        cds_list_for_each_entry(iter, declaration_specifier, siblings) {
 
@@ -242,17 +718,16 @@ int ctf_typedef_declarator_visit(FILE *fd, int depth,
 
 static
 int ctf_typedef_visit(FILE *fd, int depth,
-                     struct list_head *declaration_specifier,
-                     struct list_head *type_declarators,
-                     struct type_scope *type_scope,
-                     struct declaration_scope *declaration_scope)
+               struct list_head *declaration_specifier,
+               struct list_head *type_declarators,
+               struct declaration_scope *declaration_scope)
 {
        struct ctf_node *iter;
 
        cds_list_for_each_entry(iter, type_declarators, siblings) {
                ret = ctf_typedef_declarator_visit(fd, depth + 1,
                        &node->u._typedef.declaration_specifier, iter,
-                       type_scope, declaration_scope);
+                       declaration_scope);
                if (ret)
                        return ret;
        }
@@ -261,13 +736,17 @@ int ctf_typedef_visit(FILE *fd, int depth,
 
 static
 int ctf_typealias_visit(FILE *fd, int depth, struct ctf_node *target,
-                       struct ctf_node *alias, struct type_scope *type_scope,
-                       struct declaration_scope *declaration_scope)
+               struct ctf_node *alias,
+               struct declaration_scope *declaration_scope)
 {
-       /* Build target type, check that it is reachable in current type scope. */
+       /*
+        * Build target type, check that it is reachable in current
+        * declaration scope.
+        */
+
        /* Only one type declarator is allowed */
 
-       /* Build alias type, add to current type scope. */
+       /* Build alias type, add to current declaration scope. */
        /* Only one type declarator is allowed */
 }
 
@@ -281,14 +760,14 @@ int ctf_event_declaration_visit(FILE *fd, int depth, struct ctf_node *node, stru
                ret = ctf_typedef_visit(fd, depth + 1,
                                        &node->u._typedef.declaration_specifier,
                                        &node->u._typedef.type_declarators,
-                                       event->type_scope, event->declaration_scope);
+                                       event->declaration_scope);
                if (ret)
                        return ret;
                break;
        case NODE_TYPEALIAS:
                ret = ctf_typealias_visit(fd, depth + 1,
                                &node->u.typealias.target, &node->u.typealias.alias
-                               event->type_scope, event->declaration_scope);
+                               event->declaration_scope);
                if (ret)
                        return ret;
                break;
@@ -308,7 +787,7 @@ int ctf_event_declaration_visit(FILE *fd, int depth, struct ctf_node *node, stru
                                return -EINVAL;
                        }
                        event->name = g_quark_from_string(right);
-                       free(right);
+                       g_free(right);
                        CTF_EVENT_SET_FIELD(event, name);
                } else if (!strcmp(left, "id")) {
                        if (CTF_EVENT_FIELD_IS_SET(event, id))
@@ -332,40 +811,35 @@ int ctf_event_declaration_visit(FILE *fd, int depth, struct ctf_node *node, stru
                                fprintf(stderr, "[error] %s: stream id %" PRIu64 " cannot be found\n", __func__, event->stream_id);
                                return -EINVAL;
                        }
-                       event->declaration_scope = new_declaration_scope(stream->declaration_scope);
-                       if (!event->declaration_scope) {
-                               fprintf(stderr, "[error] %s: Error allocating declaration scope\n", __func__);
-                               return -EPERM;
-                       }
                        CTF_EVENT_SET_FIELD(event, stream_id);
                } else if (!strcmp(left, "context")) {
                        struct declaration *declaration;
 
-                       if (!event->declaration_scope)
+                       if (!event->definition_scope)
                                return -EPERM;
                        declaration = ctf_declaration_specifier_visit(fd, depth,
                                        &node->u.ctf_expression.right,
-                                       event->type_scope, event->declaration_scope);
+                                       event->declaration_scope);
                        if (!declaration)
                                return -EPERM;
                        if (declaration->type->id != CTF_TYPE_STRUCT)
                                return -EPERM;
-                       event->context = container_of(declaration, struct declaration_struct, p);
+                       event->context_decl = container_of(declaration, struct declaration_struct, p);
                } else if (!strcmp(left, "fields")) {
                        struct declaration *declaration;
 
-                       if (!event->declaration_scope)
+                       if (!event->definition_scope)
                                return -EPERM;
                        declaration = ctf_declaration_specifier_visit(fd, depth,
                                        &node->u.ctf_expression.right,
-                                       event->type_scope, event->declaration_scope);
+                                       event->declaration_scope);
                        if (!declaration)
                                return -EPERM;
                        if (declaration->type->id != CTF_TYPE_STRUCT)
                                return -EPERM;
-                       event->fields = container_of(declaration, struct declaration_struct, p);
+                       event->fields_decl = container_of(declaration, struct declaration_struct, p);
                }
-               free(left);
+               g_free(left);
                break;
        }
        default:
@@ -378,14 +852,15 @@ int ctf_event_declaration_visit(FILE *fd, int depth, struct ctf_node *node, stru
 
 static
 int ctf_event_visit(FILE *fd, int depth, struct ctf_node *node,
-                   struct type_scope *parent_type_scope, struct ctf_trace *trace)
+                   struct declaration_scope *parent_declaration_scope, struct ctf_trace *trace)
 {
        int ret = 0;
        struct ctf_node *iter;
        struct ctf_event *event;
+       struct definition_scope *parent_def_scope;
 
        event = g_new0(struct ctf_event, 1);
-       event->type_scope = new_type_scope(parent_type_scope);
+       event->declaration_scope = new_declaration_scope(parent_declaration_scope);
        cds_list_for_each_entry(iter, &node->u.event.declaration_list, siblings) {
                ret = ctf_event_declaration_visit(fd, depth + 1, iter, event, trace);
                if (ret)
@@ -409,13 +884,34 @@ int ctf_event_visit(FILE *fd, int depth, struct ctf_node *node,
        g_hash_table_insert(event->stream->event_quark_to_id,
                            (gpointer)(unsigned long) event->name,
                            &event->id);
+       parent_def_scope = stream->definition_scope;
+       if (event->context_decl) {
+               event->context =
+                       event->context_decl->definition_new(event->context_decl,
+                               parent_def_scope, 0, 0);
+               set_dynamic_definition_scope(&event->context->p,
+                                            event->context->scope,
+                                            "event.context");
+               parent_def_scope = event->context->scope;
+               declaration_unref(event->context_decl);
+       }
+       if (event->fields_decl) {
+               event->fields =
+                       event->fields_decl->definition_new(event->fields_decl,
+                               parent_def_scope, 0, 0);
+               set_dynamic_definition_scope(&event->fields->p,
+                                            event->fields->scope,
+                                            "event.fields");
+               parent_def_scope = event->fields->scope;
+               declaration_unref(event->fields_decl);
+       }
        return 0;
 
 error:
-       declaration_unref(event->fields);
-       declaration_unref(event->context);
+       declaration_unref(event->fields_decl);
+       declaration_unref(event->context_decl);
+       free_definition_scope(event->definition_scope);
        free_declaration_scope(event->declaration_scope);
-       free_type_scope(event->type_scope);
        g_free(event);
        return ret;
 }
@@ -431,14 +927,14 @@ int ctf_stream_declaration_visit(FILE *fd, int depth, struct ctf_node *node, str
                ret = ctf_typedef_visit(fd, depth + 1,
                                        &node->u._typedef.declaration_specifier,
                                        &node->u._typedef.type_declarators,
-                                       stream->type_scope, stream->declaration_scope);
+                                       stream->declaration_scope);
                if (ret)
                        return ret;
                break;
        case NODE_TYPEALIAS:
                ret = ctf_typealias_visit(fd, depth + 1,
                                &node->u.typealias.target, &node->u.typealias.alias
-                               stream->type_scope, stream->declaration_scope);
+                               stream->declaration_scope);
                if (ret)
                        return ret;
                break;
@@ -456,41 +952,41 @@ int ctf_stream_declaration_visit(FILE *fd, int depth, struct ctf_node *node, str
                                return -EINVAL;
                        }
                        CTF_EVENT_SET_FIELD(event, stream_id);
-               } else if (!strcmp(left, "event_header")) {
+               } else if (!strcmp(left, "event.header")) {
                        struct declaration *declaration;
 
                        declaration = ctf_declaration_specifier_visit(fd, depth,
                                        &node->u.ctf_expression.right,
-                                       stream->type_scope, stream->declaration_scope);
+                                       stream->declaration_scope, stream->definition_scope);
                        if (!declaration)
                                return -EPERM;
                        if (declaration->type->id != CTF_TYPE_STRUCT)
                                return -EPERM;
-                       stream->event_header = container_of(declaration, struct declaration_struct, p);
-               } else if (!strcmp(left, "event_context")) {
+                       stream->event_header_decl = container_of(declaration, struct declaration_struct, p);
+               } else if (!strcmp(left, "event.context")) {
                        struct declaration *declaration;
 
                        declaration = ctf_declaration_specifier_visit(fd, depth,
                                        &node->u.ctf_expression.right,
-                                       stream->type_scope, stream->declaration_scope);
+                                       stream->declaration_scope);
                        if (!declaration)
                                return -EPERM;
                        if (declaration->type->id != CTF_TYPE_STRUCT)
                                return -EPERM;
-                       stream->event_context = container_of(declaration, struct declaration_struct, p);
-               } else if (!strcmp(left, "packet_context")) {
+                       stream->event_context_decl = container_of(declaration, struct declaration_struct, p);
+               } else if (!strcmp(left, "packet.context")) {
                        struct declaration *declaration;
 
                        declaration = ctf_declaration_specifier_visit(fd, depth,
                                        &node->u.ctf_expression.right,
-                                       stream->type_scope, stream->declaration_scope);
+                                       stream->declaration_scope);
                        if (!declaration)
                                return -EPERM;
                        if (declaration->type->id != CTF_TYPE_STRUCT)
                                return -EPERM;
-                       stream->packet_context = container_of(declaration, struct declaration_struct, p);
+                       stream->packet_context_decl = container_of(declaration, struct declaration_struct, p);
                }
-               free(left);
+               g_free(left);
                break;
        }
        default:
@@ -503,15 +999,15 @@ int ctf_stream_declaration_visit(FILE *fd, int depth, struct ctf_node *node, str
 
 static
 int ctf_stream_visit(FILE *fd, int depth, struct ctf_node *node,
-                    struct type_scope *parent_type_scope, struct ctf_trace *trace)
+                    struct declaration_scope *parent_declaration_scope, struct ctf_trace *trace)
 {
        int ret = 0;
        struct ctf_node *iter;
        struct ctf_stream *stream;
+       struct definition_scope *parent_def_scope;
 
        stream = g_new0(struct ctf_stream, 1);
-       stream->type_scope = new_type_scope(parent_type_scope);
-       stream->declaration_scope = new_declaration_scope(trace->declaration_scope);
+       stream->declaration_scope = new_declaration_scope(parent_declaration_scope);
        stream->events_by_id = g_ptr_array_new();
        stream->event_quark_to_id = g_hash_table_new(g_int_hash, g_int_equal);
        cds_list_for_each_entry(iter, &node->u.stream.declaration_list, siblings) {
@@ -526,6 +1022,40 @@ int ctf_stream_visit(FILE *fd, int depth, struct ctf_node *node,
        if (trace->streams->len <= stream->stream_id)
                g_ptr_array_set_size(trace->streams, stream->stream_id + 1);
        g_ptr_array_index(trace->streams, stream->stream_id) = stream;
+
+       parent_def_scope = NULL;
+       if (stream->packet_context_decl) {
+               stream->packet_context =
+                       stream->packet_context_decl->definition_new(stream->packet_context_decl,
+                               parent_def_scope, 0, 0);
+               set_dynamic_definition_scope(&stream->packet_context->p,
+                                            stream->packet_context->scope,
+                                            "stream.packet.context");
+               parent_def_scope = stream->packet_context->scope;
+               declaration_unref(stream->packet_context_decl);
+       }
+       if (stream->event_header_decl) {
+               stream->event_header =
+                       stream->event_header_decl->definition_new(stream->event_header_decl,
+                               parent_def_scope, 0, 0);
+               set_dynamic_definition_scope(&stream->event_header->p,
+                                            stream->event_header->scope,
+                                            "stream.event.header");
+               parent_def_scope = stream->event_header->scope;
+               declaration_unref(stream->event_header_decl);
+       }
+       if (stream->event_context_decl) {
+               stream->event_context =
+                       stream->event_context_decl->definition_new(stream->event_context_decl,
+                               parent_def_scope, 0, 0);
+               set_dynamic_definition_scope(&stream->event_context->p,
+                                            stream->event_context->scope,
+                                            "stream.event.context");
+               parent_def_scope = stream->event_context->scope;
+               declaration_unref(stream->event_context_decl);
+       }
+       stream->definition_scope = parent_def_scope;
+
        return 0;
 
 error:
@@ -534,8 +1064,8 @@ error:
        declaration_unref(stream->packet_context);
        g_ptr_array_free(stream->events_by_id, TRUE);
        g_hash_table_free(stream->event_quark_to_id);
+       free_definition_scope(stream->definition_scope);
        free_declaration_scope(stream->declaration_scope);
-       free_type_scope(stream->type_scope);
        g_free(stream);
        return ret;
 }
@@ -550,14 +1080,14 @@ int ctf_trace_declaration_visit(FILE *fd, int depth, struct ctf_node *node, stru
                ret = ctf_typedef_visit(fd, depth + 1,
                                        &node->u._typedef.declaration_specifier,
                                        &node->u._typedef.type_declarators,
-                                       trace->type_scope, trace->declaration_scope);
+                                       trace->declaration_scope);
                if (ret)
                        return ret;
                break;
        case NODE_TYPEALIAS:
                ret = ctf_typealias_visit(fd, depth + 1,
                                &node->u.typealias.target, &node->u.typealias.alias
-                               trace->type_scope, trace->declaration_scope);
+                               trace->declaration_scope);
                if (ret)
                        return ret;
                break;
@@ -603,7 +1133,7 @@ int ctf_trace_declaration_visit(FILE *fd, int depth, struct ctf_node *node, stru
                        }
                        CTF_EVENT_SET_FIELD(trace, uuid);
                }
-               free(left);
+               g_free(left);
                break;
        }
        default:
@@ -621,10 +1151,10 @@ int ctf_trace_visit(FILE *fd, int depth, struct ctf_node *node, struct ctf_trace
        int ret = 0;
        struct ctf_node *iter;
 
-       if (trace->type_scope)
+       if (trace->declaration_scope)
                return -EEXIST;
-       trace->type_scope = new_type_scope(trace->root_type_scope);
        trace->declaration_scope = new_declaration_scope(trace->root_declaration_scope);
+       trace->definition_scope = new_dynamic_definition_scope(trace->root_definition_scope);
        trace->streams = g_ptr_array_new();
        cds_list_for_each_entry(iter, &node->u.trace.declaration_list, siblings) {
                ret = ctf_trace_declaration_visit(fd, depth + 1, iter, trace);
@@ -651,8 +1181,8 @@ int ctf_trace_visit(FILE *fd, int depth, struct ctf_node *node, struct ctf_trace
 
 error:
        g_ptr_array_free(trace->streams, TRUE);
+       free_definition_scope(stream->definition_scope);
        free_declaration_scope(stream->declaration_scope);
-       free_type_scope(stream->type_scope);
        return ret;
 }
 
@@ -668,7 +1198,7 @@ int _ctf_visitor(FILE *fd, int depth, struct ctf_node *node, struct ctf_trace *t
                        ret = ctf_typedef_visit(fd, depth + 1,
                                                &iter->u._typedef.declaration_specifier,
                                                &iter->u._typedef.type_declarators,
-                                               trace->type_scope, trace->declaration_scope);
+                                               trace->root_declaration_scope);
                        if (ret)
                                return ret;
                }
@@ -676,13 +1206,12 @@ int _ctf_visitor(FILE *fd, int depth, struct ctf_node *node, struct ctf_trace *t
                                        siblings) {
                        ret = ctf_typealias_visit(fd, depth + 1,
                                        &iter->u.typealias.target, &iter->u.typealias.alias
-                                       trace->type_scope, trace->declaration_scope);
+                                       trace->root_declaration_scope);
                        if (ret)
                                return ret;
                }
                cds_list_for_each_entry(iter, &node->u.root.declaration_specifier, siblings) {
-                       ret = ctf_type_specifier_visit(fd, depth, iter,
-                                       trace->root_type_scope,
+                       ret = ctf_declaration_specifier_visit(fd, depth, iter,
                                        trace->root_declaration_scope);
                        if (ret)
                                return ret;
@@ -694,13 +1223,13 @@ int _ctf_visitor(FILE *fd, int depth, struct ctf_node *node, struct ctf_trace *t
                }
                cds_list_for_each_entry(iter, &node->u.root.stream, siblings) {
                        ret = ctf_stream_visit(fd, depth + 1, iter,
-                                              trace->type_scope, trace);
+                                              trace->root_declaration_scope, trace);
                        if (ret)
                                return ret;
                }
                cds_list_for_each_entry(iter, &node->u.root.event, siblings) {
                        ret = ctf_event_visit(fd, depth + 1, iter,
-                                             trace->type_scope, trace);
+                                             trace->root_declaration_scope, trace);
                        if (ret)
                                return ret;
                }
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