Initial import of qemu-2.4.1HEADmaster

1 files changed, 484 insertions, 0 deletions

diff --git a/scripts/qapi-visit.py b/scripts/qapi-visit.py
new file mode 100644
index 00000000..5b993364
--- /dev/null
+++ b/scripts/qapi-visit.py
@@ -0,0 +1,484 @@
+#
+# QAPI visitor generator
+#
+# Copyright IBM, Corp. 2011
+# Copyright (C) 2014-2015 Red Hat, Inc.
+#
+# Authors:
+#  Anthony Liguori <aliguori@us.ibm.com>
+#  Michael Roth    <mdroth@linux.vnet.ibm.com>
+#  Markus Armbruster <armbru@redhat.com>
+#
+# This work is licensed under the terms of the GNU GPL, version 2.
+# See the COPYING file in the top-level directory.
+
+from ordereddict import OrderedDict
+from qapi import *
+import re
+
+implicit_structs = []
+
+def generate_visit_implicit_struct(type):
+    global implicit_structs
+    if type in implicit_structs:
+        return ''
+    implicit_structs.append(type)
+    return mcgen('''
+
+static void visit_type_implicit_%(c_type)s(Visitor *m, %(c_type)s **obj, Error **errp)
+{
+    Error *err = NULL;
+
+    visit_start_implicit_struct(m, (void **)obj, sizeof(%(c_type)s), &err);
+    if (!err) {
+        visit_type_%(c_type)s_fields(m, obj, errp);
+        visit_end_implicit_struct(m, &err);
+    }
+    error_propagate(errp, err);
+}
+''',
+                 c_type=type_name(type))
+
+def generate_visit_struct_fields(name, members, base = None):
+    substructs = []
+    ret = ''
+
+    if base:
+        ret += generate_visit_implicit_struct(base)
+
+    ret += mcgen('''
+
+static void visit_type_%(name)s_fields(Visitor *m, %(name)s **obj, Error **errp)
+{
+    Error *err = NULL;
+''',
+                 name=c_name(name))
+    push_indent()
+
+    if base:
+        ret += mcgen('''
+visit_type_implicit_%(type)s(m, &(*obj)->%(c_name)s, &err);
+if (err) {
+    goto out;
+}
+''',
+                     type=type_name(base), c_name=c_name('base'))
+
+    for argname, argentry, optional in parse_args(members):
+        if optional:
+            ret += mcgen('''
+visit_optional(m, &(*obj)->has_%(c_name)s, "%(name)s", &err);
+if (!err && (*obj)->has_%(c_name)s) {
+''',
+                         c_name=c_name(argname), name=argname)
+            push_indent()
+
+        ret += mcgen('''
+visit_type_%(type)s(m, &(*obj)->%(c_name)s, "%(name)s", &err);
+''',
+                     type=type_name(argentry), c_name=c_name(argname),
+                     name=argname)
+
+        if optional:
+            pop_indent()
+            ret += mcgen('''
+}
+''')
+        ret += mcgen('''
+if (err) {
+    goto out;
+}
+''')
+
+    pop_indent()
+    if re.search('^ *goto out\\;', ret, re.MULTILINE):
+        ret += mcgen('''
+
+out:
+''')
+    ret += mcgen('''
+    error_propagate(errp, err);
+}
+''')
+    return ret
+
+
+def generate_visit_struct_body(name, members):
+    ret = mcgen('''
+    Error *err = NULL;
+
+    visit_start_struct(m, (void **)obj, "%(name)s", name, sizeof(%(c_name)s), &err);
+    if (!err) {
+        if (*obj) {
+            visit_type_%(c_name)s_fields(m, obj, errp);
+        }
+        visit_end_struct(m, &err);
+    }
+    error_propagate(errp, err);
+''',
+                name=name, c_name=c_name(name))
+
+    return ret
+
+def generate_visit_struct(expr):
+
+    name = expr['struct']
+    members = expr['data']
+    base = expr.get('base')
+
+    ret = generate_visit_struct_fields(name, members, base)
+
+    ret += mcgen('''
+
+void visit_type_%(name)s(Visitor *m, %(name)s **obj, const char *name, Error **errp)
+{
+''',
+                 name=c_name(name))
+
+    ret += generate_visit_struct_body(name, members)
+
+    ret += mcgen('''
+}
+''')
+    return ret
+
+def generate_visit_list(name, members):
+    return mcgen('''
+
+void visit_type_%(name)sList(Visitor *m, %(name)sList **obj, const char *name, Error **errp)
+{
+    Error *err = NULL;
+    GenericList *i, **prev;
+
+    visit_start_list(m, name, &err);
+    if (err) {
+        goto out;
+    }
+
+    for (prev = (GenericList **)obj;
+         !err && (i = visit_next_list(m, prev, &err)) != NULL;
+         prev = &i) {
+        %(name)sList *native_i = (%(name)sList *)i;
+        visit_type_%(name)s(m, &native_i->value, NULL, &err);
+    }
+
+    error_propagate(errp, err);
+    err = NULL;
+    visit_end_list(m, &err);
+out:
+    error_propagate(errp, err);
+}
+''',
+                name=type_name(name))
+
+def generate_visit_enum(name, members):
+    return mcgen('''
+
+void visit_type_%(name)s(Visitor *m, %(name)s *obj, const char *name, Error **errp)
+{
+    visit_type_enum(m, (int *)obj, %(name)s_lookup, "%(name)s", name, errp);
+}
+''',
+                 name=c_name(name))
+
+def generate_visit_alternate(name, members):
+    ret = mcgen('''
+
+void visit_type_%(name)s(Visitor *m, %(name)s **obj, const char *name, Error **errp)
+{
+    Error *err = NULL;
+
+    visit_start_implicit_struct(m, (void**) obj, sizeof(%(name)s), &err);
+    if (err) {
+        goto out;
+    }
+    visit_get_next_type(m, (int*) &(*obj)->kind, %(name)s_qtypes, name, &err);
+    if (err) {
+        goto out_end;
+    }
+    switch ((*obj)->kind) {
+''',
+                name=c_name(name))
+
+    # For alternate, always use the default enum type automatically generated
+    # as name + 'Kind'
+    disc_type = c_name(name) + 'Kind'
+
+    for key in members:
+        assert (members[key] in builtin_types.keys()
+            or find_struct(members[key])
+            or find_union(members[key])
+            or find_enum(members[key])), "Invalid alternate member"
+
+        enum_full_value = c_enum_const(disc_type, key)
+        ret += mcgen('''
+    case %(enum_full_value)s:
+        visit_type_%(c_type)s(m, &(*obj)->%(c_name)s, name, &err);
+        break;
+''',
+                enum_full_value = enum_full_value,
+                c_type = type_name(members[key]),
+                c_name = c_name(key))
+
+    ret += mcgen('''
+    default:
+        abort();
+    }
+out_end:
+    error_propagate(errp, err);
+    err = NULL;
+    visit_end_implicit_struct(m, &err);
+out:
+    error_propagate(errp, err);
+}
+''')
+
+    return ret
+
+
+def generate_visit_union(expr):
+
+    name = expr['union']
+    members = expr['data']
+
+    base = expr.get('base')
+    discriminator = expr.get('discriminator')
+
+    enum_define = discriminator_find_enum_define(expr)
+    if enum_define:
+        # Use the enum type as discriminator
+        ret = ""
+        disc_type = c_name(enum_define['enum_name'])
+    else:
+        # There will always be a discriminator in the C switch code, by default
+        # it is an enum type generated silently
+        ret = generate_visit_enum(name + 'Kind', members.keys())
+        disc_type = c_name(name) + 'Kind'
+
+    if base:
+        assert discriminator
+        base_fields = find_struct(base)['data'].copy()
+        del base_fields[discriminator]
+        ret += generate_visit_struct_fields(name, base_fields)
+
+    if discriminator:
+        for key in members:
+            ret += generate_visit_implicit_struct(members[key])
+
+    ret += mcgen('''
+
+void visit_type_%(name)s(Visitor *m, %(name)s **obj, const char *name, Error **errp)
+{
+    Error *err = NULL;
+
+    visit_start_struct(m, (void **)obj, "%(name)s", name, sizeof(%(name)s), &err);
+    if (err) {
+        goto out;
+    }
+    if (*obj) {
+''',
+                 name=c_name(name))
+
+    if base:
+        ret += mcgen('''
+        visit_type_%(name)s_fields(m, obj, &err);
+        if (err) {
+            goto out_obj;
+        }
+''',
+                     name=c_name(name))
+
+    if not discriminator:
+        disc_key = "type"
+    else:
+        disc_key = discriminator
+    ret += mcgen('''
+        visit_type_%(disc_type)s(m, &(*obj)->kind, "%(disc_key)s", &err);
+        if (err) {
+            goto out_obj;
+        }
+        if (!visit_start_union(m, !!(*obj)->data, &err) || err) {
+            goto out_obj;
+        }
+        switch ((*obj)->kind) {
+''',
+                 disc_type = disc_type,
+                 disc_key = disc_key)
+
+    for key in members:
+        if not discriminator:
+            fmt = 'visit_type_%(c_type)s(m, &(*obj)->%(c_name)s, "data", &err);'
+        else:
+            fmt = 'visit_type_implicit_%(c_type)s(m, &(*obj)->%(c_name)s, &err);'
+
+        enum_full_value = c_enum_const(disc_type, key)
+        ret += mcgen('''
+        case %(enum_full_value)s:
+            ''' + fmt + '''
+            break;
+''',
+                enum_full_value = enum_full_value,
+                c_type=type_name(members[key]),
+                c_name=c_name(key))
+
+    ret += mcgen('''
+        default:
+            abort();
+        }
+out_obj:
+        error_propagate(errp, err);
+        err = NULL;
+        visit_end_union(m, !!(*obj)->data, &err);
+        error_propagate(errp, err);
+        err = NULL;
+    }
+    visit_end_struct(m, &err);
+out:
+    error_propagate(errp, err);
+}
+''')
+
+    return ret
+
+def generate_declaration(name, members, builtin_type=False):
+    ret = ""
+    if not builtin_type:
+        name = c_name(name)
+        ret += mcgen('''
+
+void visit_type_%(name)s(Visitor *m, %(name)s **obj, const char *name, Error **errp);
+''',
+                     name=name)
+
+    ret += mcgen('''
+void visit_type_%(name)sList(Visitor *m, %(name)sList **obj, const char *name, Error **errp);
+''',
+                 name=name)
+
+    return ret
+
+def generate_enum_declaration(name, members):
+    ret = mcgen('''
+void visit_type_%(name)sList(Visitor *m, %(name)sList **obj, const char *name, Error **errp);
+''',
+                name=c_name(name))
+
+    return ret
+
+def generate_decl_enum(name, members):
+    return mcgen('''
+
+void visit_type_%(name)s(Visitor *m, %(name)s *obj, const char *name, Error **errp);
+''',
+                 name=c_name(name))
+
+do_builtins = False
+
+(input_file, output_dir, do_c, do_h, prefix, opts) = \
+    parse_command_line("b", ["builtins"])
+
+for o, a in opts:
+    if o in ("-b", "--builtins"):
+        do_builtins = True
+
+c_comment = '''
+/*
+ * schema-defined QAPI visitor functions
+ *
+ * Copyright IBM, Corp. 2011
+ *
+ * Authors:
+ *  Anthony Liguori   <aliguori@us.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
+ * See the COPYING.LIB file in the top-level directory.
+ *
+ */
+'''
+h_comment = '''
+/*
+ * schema-defined QAPI visitor functions
+ *
+ * Copyright IBM, Corp. 2011
+ *
+ * Authors:
+ *  Anthony Liguori   <aliguori@us.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
+ * See the COPYING.LIB file in the top-level directory.
+ *
+ */
+'''
+
+(fdef, fdecl) = open_output(output_dir, do_c, do_h, prefix,
+                            'qapi-visit.c', 'qapi-visit.h',
+                            c_comment, h_comment)
+
+fdef.write(mcgen('''
+#include "qemu-common.h"
+#include "%(prefix)sqapi-visit.h"
+''',
+                 prefix = prefix))
+
+fdecl.write(mcgen('''
+#include "qapi/visitor.h"
+#include "%(prefix)sqapi-types.h"
+
+''',
+                  prefix=prefix))
+
+exprs = parse_schema(input_file)
+
+# to avoid header dependency hell, we always generate declarations
+# for built-in types in our header files and simply guard them
+fdecl.write(guardstart("QAPI_VISIT_BUILTIN_VISITOR_DECL"))
+for typename in builtin_types.keys():
+    fdecl.write(generate_declaration(typename, None, builtin_type=True))
+fdecl.write(guardend("QAPI_VISIT_BUILTIN_VISITOR_DECL"))
+
+# ...this doesn't work for cases where we link in multiple objects that
+# have the functions defined, so we use -b option to provide control
+# over these cases
+if do_builtins:
+    for typename in builtin_types.keys():
+        fdef.write(generate_visit_list(typename, None))
+
+for expr in exprs:
+    if expr.has_key('struct'):
+        ret = generate_visit_struct(expr)
+        ret += generate_visit_list(expr['struct'], expr['data'])
+        fdef.write(ret)
+
+        ret = generate_declaration(expr['struct'], expr['data'])
+        fdecl.write(ret)
+    elif expr.has_key('union'):
+        ret = generate_visit_union(expr)
+        ret += generate_visit_list(expr['union'], expr['data'])
+        fdef.write(ret)
+
+        enum_define = discriminator_find_enum_define(expr)
+        ret = ""
+        if not enum_define:
+            ret = generate_decl_enum('%sKind' % expr['union'],
+                                     expr['data'].keys())
+        ret += generate_declaration(expr['union'], expr['data'])
+        fdecl.write(ret)
+    elif expr.has_key('alternate'):
+        ret = generate_visit_alternate(expr['alternate'], expr['data'])
+        ret += generate_visit_list(expr['alternate'], expr['data'])
+        fdef.write(ret)
+
+        ret = generate_decl_enum('%sKind' % expr['alternate'],
+                                 expr['data'].keys())
+        ret += generate_declaration(expr['alternate'], expr['data'])
+        fdecl.write(ret)
+    elif expr.has_key('enum'):
+        ret = generate_visit_list(expr['enum'], expr['data'])
+        ret += generate_visit_enum(expr['enum'], expr['data'])
+        fdef.write(ret)
+
+        ret = generate_decl_enum(expr['enum'], expr['data'])
+        ret += generate_enum_declaration(expr['enum'], expr['data'])
+        fdecl.write(ret)
+
+close_output(fdef, fdecl)