mirror of
https://github.com/xemu-project/xemu.git
synced 2025-04-02 11:11:48 -04:00
04f22362f1
This patch adds a new 'coroutine' flag to QMP command definitions that tells the QMP dispatcher that the command handler is safe to be run in a coroutine. The documentation of the new flag pretends that this flag is already used as intended, which it isn't yet after this patch. We'll implement this in another patch in this series. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Message-Id: <20201005155855.256490-9-kwolf@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
237 lines
8.3 KiB
Python
237 lines
8.3 KiB
Python
"""
|
|
QAPI introspection generator
|
|
|
|
Copyright (C) 2015-2018 Red Hat, Inc.
|
|
|
|
Authors:
|
|
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 qapi.common import *
|
|
from qapi.gen import QAPISchemaMonolithicCVisitor
|
|
from qapi.schema import (QAPISchemaArrayType, QAPISchemaBuiltinType,
|
|
QAPISchemaType)
|
|
|
|
|
|
def _make_tree(obj, ifcond, features, extra=None):
|
|
if extra is None:
|
|
extra = {}
|
|
if ifcond:
|
|
extra['if'] = ifcond
|
|
if features:
|
|
obj['features'] = [(f.name, {'if': f.ifcond}) for f in features]
|
|
if extra:
|
|
return (obj, extra)
|
|
return obj
|
|
|
|
|
|
def _tree_to_qlit(obj, level=0, suppress_first_indent=False):
|
|
|
|
def indent(level):
|
|
return level * 4 * ' '
|
|
|
|
if isinstance(obj, tuple):
|
|
ifobj, extra = obj
|
|
ifcond = extra.get('if')
|
|
comment = extra.get('comment')
|
|
ret = ''
|
|
if comment:
|
|
ret += indent(level) + '/* %s */\n' % comment
|
|
if ifcond:
|
|
ret += gen_if(ifcond)
|
|
ret += _tree_to_qlit(ifobj, level)
|
|
if ifcond:
|
|
ret += '\n' + gen_endif(ifcond)
|
|
return ret
|
|
|
|
ret = ''
|
|
if not suppress_first_indent:
|
|
ret += indent(level)
|
|
if obj is None:
|
|
ret += 'QLIT_QNULL'
|
|
elif isinstance(obj, str):
|
|
ret += 'QLIT_QSTR(' + to_c_string(obj) + ')'
|
|
elif isinstance(obj, list):
|
|
elts = [_tree_to_qlit(elt, level + 1).strip('\n')
|
|
for elt in obj]
|
|
elts.append(indent(level + 1) + "{}")
|
|
ret += 'QLIT_QLIST(((QLitObject[]) {\n'
|
|
ret += '\n'.join(elts) + '\n'
|
|
ret += indent(level) + '}))'
|
|
elif isinstance(obj, dict):
|
|
elts = []
|
|
for key, value in sorted(obj.items()):
|
|
elts.append(indent(level + 1) + '{ %s, %s }' %
|
|
(to_c_string(key),
|
|
_tree_to_qlit(value, level + 1, True)))
|
|
elts.append(indent(level + 1) + '{}')
|
|
ret += 'QLIT_QDICT(((QLitDictEntry[]) {\n'
|
|
ret += ',\n'.join(elts) + '\n'
|
|
ret += indent(level) + '}))'
|
|
elif isinstance(obj, bool):
|
|
ret += 'QLIT_QBOOL(%s)' % ('true' if obj else 'false')
|
|
else:
|
|
assert False # not implemented
|
|
if level > 0:
|
|
ret += ','
|
|
return ret
|
|
|
|
|
|
def to_c_string(string):
|
|
return '"' + string.replace('\\', r'\\').replace('"', r'\"') + '"'
|
|
|
|
|
|
class QAPISchemaGenIntrospectVisitor(QAPISchemaMonolithicCVisitor):
|
|
|
|
def __init__(self, prefix, unmask):
|
|
super().__init__(
|
|
prefix, 'qapi-introspect',
|
|
' * QAPI/QMP schema introspection', __doc__)
|
|
self._unmask = unmask
|
|
self._schema = None
|
|
self._trees = []
|
|
self._used_types = []
|
|
self._name_map = {}
|
|
self._genc.add(mcgen('''
|
|
#include "qemu/osdep.h"
|
|
#include "%(prefix)sqapi-introspect.h"
|
|
|
|
''',
|
|
prefix=prefix))
|
|
|
|
def visit_begin(self, schema):
|
|
self._schema = schema
|
|
|
|
def visit_end(self):
|
|
# visit the types that are actually used
|
|
for typ in self._used_types:
|
|
typ.visit(self)
|
|
# generate C
|
|
name = c_name(self._prefix, protect=False) + 'qmp_schema_qlit'
|
|
self._genh.add(mcgen('''
|
|
#include "qapi/qmp/qlit.h"
|
|
|
|
extern const QLitObject %(c_name)s;
|
|
''',
|
|
c_name=c_name(name)))
|
|
self._genc.add(mcgen('''
|
|
const QLitObject %(c_name)s = %(c_string)s;
|
|
''',
|
|
c_name=c_name(name),
|
|
c_string=_tree_to_qlit(self._trees)))
|
|
self._schema = None
|
|
self._trees = []
|
|
self._used_types = []
|
|
self._name_map = {}
|
|
|
|
def visit_needed(self, entity):
|
|
# Ignore types on first pass; visit_end() will pick up used types
|
|
return not isinstance(entity, QAPISchemaType)
|
|
|
|
def _name(self, name):
|
|
if self._unmask:
|
|
return name
|
|
if name not in self._name_map:
|
|
self._name_map[name] = '%d' % len(self._name_map)
|
|
return self._name_map[name]
|
|
|
|
def _use_type(self, typ):
|
|
# Map the various integer types to plain int
|
|
if typ.json_type() == 'int':
|
|
typ = self._schema.lookup_type('int')
|
|
elif (isinstance(typ, QAPISchemaArrayType) and
|
|
typ.element_type.json_type() == 'int'):
|
|
typ = self._schema.lookup_type('intList')
|
|
# Add type to work queue if new
|
|
if typ not in self._used_types:
|
|
self._used_types.append(typ)
|
|
# Clients should examine commands and events, not types. Hide
|
|
# type names as integers to reduce the temptation. Also, it
|
|
# saves a few characters on the wire.
|
|
if isinstance(typ, QAPISchemaBuiltinType):
|
|
return typ.name
|
|
if isinstance(typ, QAPISchemaArrayType):
|
|
return '[' + self._use_type(typ.element_type) + ']'
|
|
return self._name(typ.name)
|
|
|
|
def _gen_tree(self, name, mtype, obj, ifcond, features):
|
|
extra = None
|
|
if mtype not in ('command', 'event', 'builtin', 'array'):
|
|
if not self._unmask:
|
|
# Output a comment to make it easy to map masked names
|
|
# back to the source when reading the generated output.
|
|
extra = {'comment': '"%s" = %s' % (self._name(name), name)}
|
|
name = self._name(name)
|
|
obj['name'] = name
|
|
obj['meta-type'] = mtype
|
|
self._trees.append(_make_tree(obj, ifcond, features, extra))
|
|
|
|
def _gen_member(self, member):
|
|
obj = {'name': member.name, 'type': self._use_type(member.type)}
|
|
if member.optional:
|
|
obj['default'] = None
|
|
return _make_tree(obj, member.ifcond, member.features)
|
|
|
|
def _gen_variants(self, tag_name, variants):
|
|
return {'tag': tag_name,
|
|
'variants': [self._gen_variant(v) for v in variants]}
|
|
|
|
def _gen_variant(self, variant):
|
|
obj = {'case': variant.name, 'type': self._use_type(variant.type)}
|
|
return _make_tree(obj, variant.ifcond, None)
|
|
|
|
def visit_builtin_type(self, name, info, json_type):
|
|
self._gen_tree(name, 'builtin', {'json-type': json_type}, [], None)
|
|
|
|
def visit_enum_type(self, name, info, ifcond, features, members, prefix):
|
|
self._gen_tree(name, 'enum',
|
|
{'values': [_make_tree(m.name, m.ifcond, None)
|
|
for m in members]},
|
|
ifcond, features)
|
|
|
|
def visit_array_type(self, name, info, ifcond, element_type):
|
|
element = self._use_type(element_type)
|
|
self._gen_tree('[' + element + ']', 'array', {'element-type': element},
|
|
ifcond, None)
|
|
|
|
def visit_object_type_flat(self, name, info, ifcond, features,
|
|
members, variants):
|
|
obj = {'members': [self._gen_member(m) for m in members]}
|
|
if variants:
|
|
obj.update(self._gen_variants(variants.tag_member.name,
|
|
variants.variants))
|
|
|
|
self._gen_tree(name, 'object', obj, ifcond, features)
|
|
|
|
def visit_alternate_type(self, name, info, ifcond, features, variants):
|
|
self._gen_tree(name, 'alternate',
|
|
{'members': [
|
|
_make_tree({'type': self._use_type(m.type)},
|
|
m.ifcond, None)
|
|
for m in variants.variants]},
|
|
ifcond, features)
|
|
|
|
def visit_command(self, name, info, ifcond, features,
|
|
arg_type, ret_type, gen, success_response, boxed,
|
|
allow_oob, allow_preconfig, coroutine):
|
|
arg_type = arg_type or self._schema.the_empty_object_type
|
|
ret_type = ret_type or self._schema.the_empty_object_type
|
|
obj = {'arg-type': self._use_type(arg_type),
|
|
'ret-type': self._use_type(ret_type)}
|
|
if allow_oob:
|
|
obj['allow-oob'] = allow_oob
|
|
self._gen_tree(name, 'command', obj, ifcond, features)
|
|
|
|
def visit_event(self, name, info, ifcond, features, arg_type, boxed):
|
|
arg_type = arg_type or self._schema.the_empty_object_type
|
|
self._gen_tree(name, 'event', {'arg-type': self._use_type(arg_type)},
|
|
ifcond, features)
|
|
|
|
|
|
def gen_introspect(schema, output_dir, prefix, opt_unmask):
|
|
vis = QAPISchemaGenIntrospectVisitor(prefix, opt_unmask)
|
|
schema.visit(vis)
|
|
vis.write(output_dir)
|