mirror of
https://github.com/php-win-ext/grpc.git
synced 2026-04-26 10:18:09 +02:00
Vishal Powar
607 lines
18 KiB
Python
Executable File
607 lines
18 KiB
Python
Executable File
#!/usr/bin/env python2.7
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# Copyright 2015 gRPC authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import hashlib
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import itertools
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import collections
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import os
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import sys
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import subprocess
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import re
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import perfection
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# Configuration: a list of either strings or 2-tuples of strings.
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# A single string represents a static grpc_mdstr.
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# A 2-tuple represents a static grpc_mdelem (and appropriate grpc_mdstrs will
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# also be created).
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# The list of 2-tuples must begin with the static hpack table elements as
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# defined by RFC 7541 and be in the same order because of an hpack encoding
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# performance optimization that relies on this. If you want to change this, then
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# you must change the implementation of the encoding optimization as well.
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CONFIG = [
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# metadata strings
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'host',
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'grpc-timeout',
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'grpc-internal-encoding-request',
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'grpc-internal-stream-encoding-request',
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'grpc-payload-bin',
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':path',
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'grpc-encoding',
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'grpc-accept-encoding',
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'user-agent',
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':authority',
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'grpc-message',
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'grpc-status',
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'grpc-server-stats-bin',
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'grpc-tags-bin',
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'grpc-trace-bin',
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'grpc-previous-rpc-attempts',
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'grpc-retry-pushback-ms',
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'1',
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'2',
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'3',
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'4',
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'',
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# channel arg keys
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'grpc.wait_for_ready',
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'grpc.timeout',
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'grpc.max_request_message_bytes',
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'grpc.max_response_message_bytes',
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# well known method names
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'/grpc.lb.v1.LoadBalancer/BalanceLoad',
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'/grpc.health.v1.Health/Watch',
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'/envoy.service.discovery.v2.AggregatedDiscoveryService/StreamAggregatedResources',
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# compression algorithm names
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'deflate',
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'gzip',
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'stream/gzip',
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# metadata elements
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# begin hpack static elements
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(':authority', ''),
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(':method', 'GET'),
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(':method', 'POST'),
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(':path', '/'),
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(':path', '/index.html'),
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(':scheme', 'http'),
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(':scheme', 'https'),
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(':status', '200'),
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(':status', '204'),
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(':status', '206'),
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(':status', '304'),
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(':status', '400'),
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(':status', '404'),
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(':status', '500'),
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('accept-charset', ''),
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('accept-encoding', 'gzip, deflate'),
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('accept-language', ''),
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('accept-ranges', ''),
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('accept', ''),
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('access-control-allow-origin', ''),
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('age', ''),
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('allow', ''),
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('authorization', ''),
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('cache-control', ''),
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('content-disposition', ''),
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('content-encoding', ''),
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('content-language', ''),
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('content-length', ''),
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('content-location', ''),
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('content-range', ''),
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('content-type', ''),
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('cookie', ''),
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('date', ''),
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('etag', ''),
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('expect', ''),
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('expires', ''),
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('from', ''),
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('host', ''),
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('if-match', ''),
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('if-modified-since', ''),
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('if-none-match', ''),
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('if-range', ''),
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('if-unmodified-since', ''),
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('last-modified', ''),
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('link', ''),
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('location', ''),
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('max-forwards', ''),
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('proxy-authenticate', ''),
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('proxy-authorization', ''),
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('range', ''),
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('referer', ''),
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('refresh', ''),
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('retry-after', ''),
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('server', ''),
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('set-cookie', ''),
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('strict-transport-security', ''),
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('transfer-encoding', ''),
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('user-agent', ''),
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('vary', ''),
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('via', ''),
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('www-authenticate', ''),
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# end hpack static elements
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('grpc-status', '0'),
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('grpc-status', '1'),
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('grpc-status', '2'),
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('grpc-encoding', 'identity'),
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('grpc-encoding', 'gzip'),
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('grpc-encoding', 'deflate'),
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('te', 'trailers'),
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('content-type', 'application/grpc'),
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(':scheme', 'grpc'),
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(':method', 'PUT'),
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('accept-encoding', ''),
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('content-encoding', 'identity'),
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('content-encoding', 'gzip'),
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('lb-token', ''),
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('lb-cost-bin', ''),
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]
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# All entries here are ignored when counting non-default initial metadata that
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# prevents the chttp2 server from sending a Trailers-Only response.
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METADATA_BATCH_CALLOUTS = [
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# (name)
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(':path'),
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(':method'),
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(':status'),
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(':authority'),
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(':scheme'),
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('te'),
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('grpc-message'),
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('grpc-status'),
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('grpc-payload-bin'),
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('grpc-encoding'),
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('grpc-accept-encoding'),
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('grpc-server-stats-bin'),
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('grpc-tags-bin'),
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('grpc-trace-bin'),
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('content-type'),
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('content-encoding'),
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('accept-encoding'),
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('grpc-internal-encoding-request'),
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('grpc-internal-stream-encoding-request'),
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('user-agent'),
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('host'),
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('lb-token'),
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('grpc-previous-rpc-attempts'),
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('grpc-retry-pushback-ms'),
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]
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COMPRESSION_ALGORITHMS = [
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'identity',
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'deflate',
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'gzip',
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]
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STREAM_COMPRESSION_ALGORITHMS = [
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'identity',
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'gzip',
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]
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# utility: mangle the name of a config
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def mangle(elem, name=None):
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xl = {
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'-': '_',
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':': '',
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'/': 'slash',
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'.': 'dot',
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',': 'comma',
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' ': '_',
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}
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def m0(x):
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if not x:
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return 'empty'
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r = ''
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for c in x:
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put = xl.get(c, c.lower())
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if not put:
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continue
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last_is_underscore = r[-1] == '_' if r else True
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if last_is_underscore and put == '_':
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continue
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elif len(put) > 1:
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if not last_is_underscore:
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r += '_'
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r += put
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r += '_'
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else:
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r += put
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if r[-1] == '_':
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r = r[:-1]
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return r
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def n(default, name=name):
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if name is None:
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return 'grpc_%s_' % default
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if name == '':
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return ''
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return 'grpc_%s_' % name
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if isinstance(elem, tuple):
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return '%s%s_%s' % (n('mdelem'), m0(elem[0]), m0(elem[1]))
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else:
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return '%s%s' % (n('mdstr'), m0(elem))
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# utility: generate some hash value for a string
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def fake_hash(elem):
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return hashlib.md5(elem).hexdigest()[0:8]
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# utility: print a big comment block into a set of files
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def put_banner(files, banner):
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for f in files:
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print >> f, '/*'
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for line in banner:
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print >> f, ' * %s' % line
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print >> f, ' */'
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print >> f
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# build a list of all the strings we need
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all_strs = list()
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all_elems = list()
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static_userdata = {}
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# put metadata batch callouts first, to make the check of if a static metadata
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# string is a callout trivial
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for elem in METADATA_BATCH_CALLOUTS:
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if elem not in all_strs:
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all_strs.append(elem)
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for elem in CONFIG:
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if isinstance(elem, tuple):
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if elem[0] not in all_strs:
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all_strs.append(elem[0])
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if elem[1] not in all_strs:
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all_strs.append(elem[1])
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if elem not in all_elems:
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all_elems.append(elem)
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else:
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if elem not in all_strs:
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all_strs.append(elem)
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compression_elems = []
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for mask in range(1, 1 << len(COMPRESSION_ALGORITHMS)):
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val = ','.join(COMPRESSION_ALGORITHMS[alg]
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for alg in range(0, len(COMPRESSION_ALGORITHMS))
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if (1 << alg) & mask)
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elem = ('grpc-accept-encoding', val)
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if val not in all_strs:
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all_strs.append(val)
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if elem not in all_elems:
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all_elems.append(elem)
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compression_elems.append(elem)
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static_userdata[elem] = 1 + (mask | 1)
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stream_compression_elems = []
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for mask in range(1, 1 << len(STREAM_COMPRESSION_ALGORITHMS)):
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val = ','.join(STREAM_COMPRESSION_ALGORITHMS[alg]
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for alg in range(0, len(STREAM_COMPRESSION_ALGORITHMS))
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if (1 << alg) & mask)
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elem = ('accept-encoding', val)
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if val not in all_strs:
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all_strs.append(val)
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if elem not in all_elems:
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all_elems.append(elem)
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stream_compression_elems.append(elem)
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static_userdata[elem] = 1 + (mask | 1)
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# output configuration
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args = sys.argv[1:]
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H = None
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C = None
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D = None
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if args:
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if 'header' in args:
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H = sys.stdout
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else:
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H = open('/dev/null', 'w')
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if 'source' in args:
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C = sys.stdout
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else:
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C = open('/dev/null', 'w')
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if 'dictionary' in args:
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D = sys.stdout
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else:
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D = open('/dev/null', 'w')
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else:
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H = open(
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os.path.join(
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os.path.dirname(sys.argv[0]),
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'../../../src/core/lib/transport/static_metadata.h'), 'w')
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C = open(
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os.path.join(
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os.path.dirname(sys.argv[0]),
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'../../../src/core/lib/transport/static_metadata.cc'), 'w')
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D = open(
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os.path.join(
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os.path.dirname(sys.argv[0]),
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'../../../test/core/end2end/fuzzers/hpack.dictionary'), 'w')
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# copy-paste copyright notice from this file
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with open(sys.argv[0]) as my_source:
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copyright = []
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for line in my_source:
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if line[0] != '#':
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break
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for line in my_source:
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if line[0] == '#':
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copyright.append(line)
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break
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for line in my_source:
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if line[0] != '#':
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break
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copyright.append(line)
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put_banner([H, C], [line[2:].rstrip() for line in copyright])
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hex_bytes = [ord(c) for c in 'abcdefABCDEF0123456789']
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def esc_dict(line):
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out = "\""
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for c in line:
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if 32 <= c < 127:
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if c != ord('"'):
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out += chr(c)
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else:
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out += "\\\""
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else:
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out += '\\x%02X' % c
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return out + "\""
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put_banner([H, C], """WARNING: Auto-generated code.
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To make changes to this file, change
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tools/codegen/core/gen_static_metadata.py, and then re-run it.
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See metadata.h for an explanation of the interface here, and metadata.cc for
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an explanation of what's going on.
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""".splitlines())
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print >> H, '#ifndef GRPC_CORE_LIB_TRANSPORT_STATIC_METADATA_H'
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print >> H, '#define GRPC_CORE_LIB_TRANSPORT_STATIC_METADATA_H'
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print >> H
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print >> H, '#include <grpc/support/port_platform.h>'
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print >> H
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print >> H, '#include "src/core/lib/transport/metadata.h"'
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print >> H
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print >> C, '#include <grpc/support/port_platform.h>'
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print >> C
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print >> C, '#include "src/core/lib/transport/static_metadata.h"'
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print >> C
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print >> C, '#include "src/core/lib/slice/slice_internal.h"'
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print >> C
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str_ofs = 0
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id2strofs = {}
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for i, elem in enumerate(all_strs):
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id2strofs[i] = str_ofs
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str_ofs += len(elem)
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def slice_def(i):
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return ('{&grpc_static_metadata_refcounts[%d],'
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' {{g_bytes+%d, %d}}}') % (i, id2strofs[i], len(all_strs[i]))
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# validate configuration
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for elem in METADATA_BATCH_CALLOUTS:
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assert elem in all_strs
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print >> H, '#define GRPC_STATIC_MDSTR_COUNT %d' % len(all_strs)
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print >> H, ('extern const grpc_slice '
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'grpc_static_slice_table[GRPC_STATIC_MDSTR_COUNT];')
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for i, elem in enumerate(all_strs):
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print >> H, '/* "%s" */' % elem
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print >> H, '#define %s (grpc_static_slice_table[%d])' % (
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mangle(elem).upper(), i)
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print >> H
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print >> C, 'static uint8_t g_bytes[] = {%s};' % (','.join(
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'%d' % ord(c) for c in ''.join(all_strs)))
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print >> C
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print >> C, 'static void static_ref(void *unused) {}'
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print >> C, 'static void static_unref(void *unused) {}'
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print >> C, ('static const grpc_slice_refcount_vtable static_sub_vtable = '
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'{static_ref, static_unref, grpc_slice_default_eq_impl, '
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'grpc_slice_default_hash_impl};')
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print >> H, ('extern const grpc_slice_refcount_vtable '
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'grpc_static_metadata_vtable;')
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print >> C, ('const grpc_slice_refcount_vtable grpc_static_metadata_vtable = '
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'{static_ref, static_unref, grpc_static_slice_eq, '
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'grpc_static_slice_hash};')
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print >> C, ('static grpc_slice_refcount static_sub_refcnt = '
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'{&static_sub_vtable, &static_sub_refcnt};')
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print >> H, ('extern grpc_slice_refcount '
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'grpc_static_metadata_refcounts[GRPC_STATIC_MDSTR_COUNT];')
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print >> C, ('grpc_slice_refcount '
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'grpc_static_metadata_refcounts[GRPC_STATIC_MDSTR_COUNT] = {')
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for i, elem in enumerate(all_strs):
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print >> C, ' {&grpc_static_metadata_vtable, &static_sub_refcnt},'
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print >> C, '};'
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print >> C
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print >> H, '#define GRPC_IS_STATIC_METADATA_STRING(slice) \\'
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print >> H, (' ((slice).refcount != NULL && (slice).refcount->vtable == '
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'&grpc_static_metadata_vtable)')
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print >> H
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print >> C, ('const grpc_slice grpc_static_slice_table[GRPC_STATIC_MDSTR_COUNT]'
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' = {')
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for i, elem in enumerate(all_strs):
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print >> C, slice_def(i) + ','
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print >> C, '};'
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print >> C
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print >> H, '#define GRPC_STATIC_METADATA_INDEX(static_slice) \\'
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print >> H, (' ((int)((static_slice).refcount - '
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'grpc_static_metadata_refcounts))')
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print >> H
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print >> D, '# hpack fuzzing dictionary'
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for i, elem in enumerate(all_strs):
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print >> D, '%s' % (esc_dict([len(elem)] + [ord(c) for c in elem]))
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for i, elem in enumerate(all_elems):
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print >> D, '%s' % (esc_dict([0, len(elem[0])] + [ord(c) for c in elem[0]] +
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[len(elem[1])] + [ord(c) for c in elem[1]]))
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print >> H, '#define GRPC_STATIC_MDELEM_COUNT %d' % len(all_elems)
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print >> H, ('extern grpc_mdelem_data '
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'grpc_static_mdelem_table[GRPC_STATIC_MDELEM_COUNT];')
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print >> H, ('extern uintptr_t '
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'grpc_static_mdelem_user_data[GRPC_STATIC_MDELEM_COUNT];')
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for i, elem in enumerate(all_elems):
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print >> H, '/* "%s": "%s" */' % elem
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print >> H, ('#define %s (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[%d], '
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'GRPC_MDELEM_STORAGE_STATIC))') % (mangle(elem).upper(), i)
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print >> H
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print >> C, ('uintptr_t grpc_static_mdelem_user_data[GRPC_STATIC_MDELEM_COUNT] '
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'= {')
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print >> C, ' %s' % ','.join(
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'%d' % static_userdata.get(elem, 0) for elem in all_elems)
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print >> C, '};'
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print >> C
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def str_idx(s):
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for i, s2 in enumerate(all_strs):
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if s == s2:
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return i
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def md_idx(m):
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for i, m2 in enumerate(all_elems):
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if m == m2:
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return i
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def offset_trials(mink):
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yield 0
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for i in range(1, 100):
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for mul in [-1, 1]:
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yield mul * i
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def perfect_hash(keys, name):
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p = perfection.hash_parameters(keys)
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def f(i, p=p):
|
|
i += p.offset
|
|
x = i % p.t
|
|
y = i / p.t
|
|
return x + p.r[y]
|
|
|
|
return {
|
|
'PHASHRANGE': p.t - 1 + max(p.r),
|
|
'PHASHNKEYS': len(p.slots),
|
|
'pyfunc': f,
|
|
'code': """
|
|
static const int8_t %(name)s_r[] = {%(r)s};
|
|
static uint32_t %(name)s_phash(uint32_t i) {
|
|
i %(offset_sign)s= %(offset)d;
|
|
uint32_t x = i %% %(t)d;
|
|
uint32_t y = i / %(t)d;
|
|
uint32_t h = x;
|
|
if (y < GPR_ARRAY_SIZE(%(name)s_r)) {
|
|
uint32_t delta = (uint32_t)%(name)s_r[y];
|
|
h += delta;
|
|
}
|
|
return h;
|
|
}
|
|
""" % {
|
|
'name': name,
|
|
'r': ','.join('%d' % (r if r is not None else 0) for r in p.r),
|
|
't': p.t,
|
|
'offset': abs(p.offset),
|
|
'offset_sign': '+' if p.offset > 0 else '-'
|
|
}
|
|
}
|
|
|
|
|
|
elem_keys = [
|
|
str_idx(elem[0]) * len(all_strs) + str_idx(elem[1]) for elem in all_elems
|
|
]
|
|
elem_hash = perfect_hash(elem_keys, 'elems')
|
|
print >> C, elem_hash['code']
|
|
|
|
keys = [0] * int(elem_hash['PHASHRANGE'])
|
|
idxs = [255] * int(elem_hash['PHASHNKEYS'])
|
|
for i, k in enumerate(elem_keys):
|
|
h = elem_hash['pyfunc'](k)
|
|
assert keys[h] == 0
|
|
keys[h] = k
|
|
idxs[h] = i
|
|
print >> C, 'static const uint16_t elem_keys[] = {%s};' % ','.join(
|
|
'%d' % k for k in keys)
|
|
print >> C, 'static const uint8_t elem_idxs[] = {%s};' % ','.join(
|
|
'%d' % i for i in idxs)
|
|
print >> C
|
|
|
|
print >> H, 'grpc_mdelem grpc_static_mdelem_for_static_strings(int a, int b);'
|
|
print >> C, 'grpc_mdelem grpc_static_mdelem_for_static_strings(int a, int b) {'
|
|
print >> C, ' if (a == -1 || b == -1) return GRPC_MDNULL;'
|
|
print >> C, ' uint32_t k = (uint32_t)(a * %d + b);' % len(all_strs)
|
|
print >> C, ' uint32_t h = elems_phash(k);'
|
|
print >> C, ' return h < GPR_ARRAY_SIZE(elem_keys) && elem_keys[h] == k && elem_idxs[h] != 255 ? GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[elem_idxs[h]], GRPC_MDELEM_STORAGE_STATIC) : GRPC_MDNULL;'
|
|
print >> C, '}'
|
|
print >> C
|
|
|
|
print >> C, 'grpc_mdelem_data grpc_static_mdelem_table[GRPC_STATIC_MDELEM_COUNT] = {'
|
|
for a, b in all_elems:
|
|
print >> C, '{%s,%s},' % (slice_def(str_idx(a)), slice_def(str_idx(b)))
|
|
print >> C, '};'
|
|
|
|
print >> H, 'typedef enum {'
|
|
for elem in METADATA_BATCH_CALLOUTS:
|
|
print >> H, ' %s,' % mangle(elem, 'batch').upper()
|
|
print >> H, ' GRPC_BATCH_CALLOUTS_COUNT'
|
|
print >> H, '} grpc_metadata_batch_callouts_index;'
|
|
print >> H
|
|
print >> H, 'typedef union {'
|
|
print >> H, ' struct grpc_linked_mdelem *array[GRPC_BATCH_CALLOUTS_COUNT];'
|
|
print >> H, ' struct {'
|
|
for elem in METADATA_BATCH_CALLOUTS:
|
|
print >> H, ' struct grpc_linked_mdelem *%s;' % mangle(elem, '').lower()
|
|
print >> H, ' } named;'
|
|
print >> H, '} grpc_metadata_batch_callouts;'
|
|
print >> H
|
|
print >> H, '#define GRPC_BATCH_INDEX_OF(slice) \\'
|
|
print >> H, ' (GRPC_IS_STATIC_METADATA_STRING((slice)) ? (grpc_metadata_batch_callouts_index)GPR_CLAMP(GRPC_STATIC_METADATA_INDEX((slice)), 0, GRPC_BATCH_CALLOUTS_COUNT) : GRPC_BATCH_CALLOUTS_COUNT)'
|
|
print >> H
|
|
|
|
print >> H, 'extern const uint8_t grpc_static_accept_encoding_metadata[%d];' % (
|
|
1 << len(COMPRESSION_ALGORITHMS))
|
|
print >> C, 'const uint8_t grpc_static_accept_encoding_metadata[%d] = {' % (
|
|
1 << len(COMPRESSION_ALGORITHMS))
|
|
print >> C, '0,%s' % ','.join('%d' % md_idx(elem) for elem in compression_elems)
|
|
print >> C, '};'
|
|
print >> C
|
|
|
|
print >> H, '#define GRPC_MDELEM_ACCEPT_ENCODING_FOR_ALGORITHMS(algs) (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[grpc_static_accept_encoding_metadata[(algs)]], GRPC_MDELEM_STORAGE_STATIC))'
|
|
print >> H
|
|
|
|
print >> H, 'extern const uint8_t grpc_static_accept_stream_encoding_metadata[%d];' % (
|
|
1 << len(STREAM_COMPRESSION_ALGORITHMS))
|
|
print >> C, 'const uint8_t grpc_static_accept_stream_encoding_metadata[%d] = {' % (
|
|
1 << len(STREAM_COMPRESSION_ALGORITHMS))
|
|
print >> C, '0,%s' % ','.join(
|
|
'%d' % md_idx(elem) for elem in stream_compression_elems)
|
|
print >> C, '};'
|
|
|
|
print >> H, '#define GRPC_MDELEM_ACCEPT_STREAM_ENCODING_FOR_ALGORITHMS(algs) (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[grpc_static_accept_stream_encoding_metadata[(algs)]], GRPC_MDELEM_STORAGE_STATIC))'
|
|
|
|
print >> H, '#endif /* GRPC_CORE_LIB_TRANSPORT_STATIC_METADATA_H */'
|
|
|
|
H.close()
|
|
C.close()
|