mirror of
https://github.com/yuzu-emu/mbedtls.git
synced 2024-11-27 09:54:19 +01:00
719 lines
24 KiB
Python
719 lines
24 KiB
Python
# Test suites code generator.
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#
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# Copyright (C) 2006-2017, ARM Limited, All Rights Reserved
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# SPDX-License-Identifier: Apache-2.0
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# 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, WITHOUT
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# 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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#
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# This file is part of mbed TLS (https://tls.mbed.org)
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"""
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Test Suite code generator.
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Generates a test source file using following input files:
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test_suite_xyz.function - Read test functions from test suite functions file.
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test_suite_xyz.data - Read test functions and their dependencies to generate
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dispatch and dependency check code.
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main template - Substitute generated test function dispatch code, dependency
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checking code.
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platform .function - Read host or target platform implementation for
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dispatching test cases from .data file.
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helper .function - Read common reusable functions.
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"""
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import os
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import re
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import argparse
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import shutil
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BEGIN_HEADER_REGEX = '/\*\s*BEGIN_HEADER\s*\*/'
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END_HEADER_REGEX = '/\*\s*END_HEADER\s*\*/'
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BEGIN_DEP_REGEX = 'BEGIN_DEPENDENCIES'
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END_DEP_REGEX = 'END_DEPENDENCIES'
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BEGIN_CASE_REGEX = '/\*\s*BEGIN_CASE\s*(.*?)\s*\*/'
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END_CASE_REGEX = '/\*\s*END_CASE\s*\*/'
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class InvalidFileFormat(Exception):
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"""
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Exception to indicate invalid file format.
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"""
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pass
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class FileWrapper(file):
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"""
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File wrapper class. Provides reading with line no. tracking.
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"""
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def __init__(self, file_name):
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"""
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Init file handle.
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:param file_name: File path to open.
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"""
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super(FileWrapper, self).__init__(file_name, 'r')
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self.line_no = 0
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def next(self):
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"""
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Iterator return impl.
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:return: Line read from file.
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"""
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line = super(FileWrapper, self).next()
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if line:
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self.line_no += 1
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return line
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def readline(self, limit=0):
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"""
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Wrap the base class readline.
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:param limit: limit to match file.readline([limit])
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:return: Line read from file.
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"""
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return self.next()
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def split_dep(dep):
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"""
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Split NOT character '!' from dependency. Used by gen_deps()
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:param dep: Dependency list
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:return: list of tuples where index 0 has '!' if there was a '!' before the dependency string
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"""
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return ('!', dep[1:]) if dep[0] == '!' else ('', dep)
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def gen_deps(deps):
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"""
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Generates dependency i.e. if def and endif code
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:param deps: List of dependencies.
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:return: if defined and endif code with macro annotations for readability.
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"""
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dep_start = ''.join(['#if %sdefined(%s)\n' % split_dep(x) for x in deps])
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dep_end = ''.join(['#endif /* %s */\n' % x for x in reversed(deps)])
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return dep_start, dep_end
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def gen_deps_one_line(deps):
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"""
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Generates dependency checks in one line. Useful for writing code in #else case.
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:param deps: List of dependencies.
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:return: ifdef code
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"""
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defines = ('#if ' if len(deps) else '') + ' && '.join(['%sdefined(%s)' % split_dep(x) for x in deps])
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return defines
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def gen_function_wrapper(name, locals, args_dispatch):
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"""
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Creates test function wrapper code. A wrapper has the code to unpack parameters from parameters[] array.
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:param name: Test function name
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:param locals: Local variables declaration code
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:param args_dispatch: List of dispatch arguments. Ex: ['(char *)params[0]', '*((int *)params[1])']
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:return: Test function wrapper.
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"""
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# Then create the wrapper
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wrapper = '''
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void {name}_wrapper( void ** params )
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{{
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{unused_params}
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{locals}
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{name}( {args} );
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}}
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'''.format(name=name, unused_params='(void)params;' if len(args_dispatch) == 0 else '',
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args=', '.join(args_dispatch),
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locals=locals)
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return wrapper
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def gen_dispatch(name, deps):
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"""
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Generates dispatch code for the test function table.
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:param name: Test function name
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:param deps: List of dependencies
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:return: Dispatch code.
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"""
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if len(deps):
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ifdef = gen_deps_one_line(deps)
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dispatch_code = '''
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{ifdef}
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{name}_wrapper,
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#else
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NULL,
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#endif
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'''.format(ifdef=ifdef, name=name)
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else:
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dispatch_code = '''
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{name}_wrapper,
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'''.format(name=name)
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return dispatch_code
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def parse_suite_headers(funcs_f):
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"""
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Parses function headers.
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:param funcs_f: file object for .functions file
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:return: Test suite headers code
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"""
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headers = '#line %d "%s"\n' % (funcs_f.line_no + 1, funcs_f.name)
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for line in funcs_f:
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if re.search(END_HEADER_REGEX, line):
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break
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headers += line
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else:
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raise InvalidFileFormat("file: %s - end header pattern [%s] not found!" % (funcs_f.name, END_HEADER_REGEX))
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return headers
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def parse_suite_deps(funcs_f):
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"""
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Parses test suite dependencies.
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:param funcs_f: file object for .functions file
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:return: List of test suite dependencies.
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"""
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deps = []
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for line in funcs_f:
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m = re.search('depends_on\:(.*)', line.strip())
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if m:
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deps += [x.strip() for x in m.group(1).split(':')]
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if re.search(END_DEP_REGEX, line):
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break
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else:
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raise InvalidFileFormat("file: %s - end dependency pattern [%s] not found!" % (funcs_f.name, END_DEP_REGEX))
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return deps
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def parse_function_deps(line):
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"""
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Parses function dependencies.
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:param line: Line from .functions file that has dependencies.
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:return: List of dependencies.
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"""
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deps = []
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m = re.search(BEGIN_CASE_REGEX, line)
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dep_str = m.group(1)
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if len(dep_str):
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m = re.search('depends_on:(.*)', dep_str)
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if m:
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deps = [x.strip() for x in m.group(1).strip().split(':')]
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return deps
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def parse_function_signature(line):
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"""
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Parsing function signature
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:param line: Line from .functions file that has a function signature.
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:return: function name, argument list, local variables for wrapper function and argument dispatch code.
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"""
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args = []
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locals = ''
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args_dispatch = []
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m = re.search('\s*void\s+(\w+)\s*\(', line, re.I)
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if not m:
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raise ValueError("Test function should return 'void'\n%s" % line)
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name = m.group(1)
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line = line[len(m.group(0)):]
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arg_idx = 0
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for arg in line[:line.find(')')].split(','):
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arg = arg.strip()
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if arg == '':
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continue
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if re.search('int\s+.*', arg.strip()):
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args.append('int')
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args_dispatch.append('*( (int *) params[%d] )' % arg_idx)
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elif re.search('char\s*\*\s*.*', arg.strip()):
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args.append('char*')
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args_dispatch.append('(char *) params[%d]' % arg_idx)
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elif re.search('HexParam_t\s*\*\s*.*', arg.strip()):
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args.append('hex')
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# create a structure
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locals += """ HexParam_t hex%d = {%s, %s};
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""" % (arg_idx, '(uint8_t *) params[%d]' % arg_idx, '*( (uint32_t *) params[%d] )' % (arg_idx + 1))
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args_dispatch.append('&hex%d' % arg_idx)
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arg_idx += 1
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else:
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raise ValueError("Test function arguments can only be 'int', 'char *' or 'HexParam_t'\n%s" % line)
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arg_idx += 1
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return name, args, locals, args_dispatch
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def parse_function_code(funcs_f, deps, suite_deps):
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"""
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Parses out a function from function file object and generates function and dispatch code.
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:param funcs_f: file object of the functions file.
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:param deps: List of dependencies
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:param suite_deps: List of test suite dependencies
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:return: Function name, arguments, function code and dispatch code.
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"""
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code = '#line %d "%s"\n' % (funcs_f.line_no + 1, funcs_f.name)
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for line in funcs_f:
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# Check function signature
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m = re.match('.*?\s+(\w+)\s*\(', line, re.I)
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if m:
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# check if we have full signature i.e. split in more lines
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if not re.match('.*\)', line):
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for lin in funcs_f:
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line += lin
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if re.search('.*?\)', line):
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break
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name, args, locals, args_dispatch = parse_function_signature(line)
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code += line.replace(name, 'test_' + name)
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name = 'test_' + name
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break
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else:
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raise InvalidFileFormat("file: %s - Test functions not found!" % funcs_f.name)
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for line in funcs_f:
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if re.search(END_CASE_REGEX, line):
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break
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code += line
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else:
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raise InvalidFileFormat("file: %s - end case pattern [%s] not found!" % (funcs_f.name, END_CASE_REGEX))
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# Add exit label if not present
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if code.find('exit:') == -1:
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s = code.rsplit('}', 1)
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if len(s) == 2:
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code = """exit:
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;;
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}""".join(s)
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code += gen_function_wrapper(name, locals, args_dispatch)
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ifdef, endif = gen_deps(deps)
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dispatch_code = gen_dispatch(name, suite_deps + deps)
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return name, args, ifdef + code + endif, dispatch_code
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def parse_functions(funcs_f):
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"""
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Returns functions code pieces
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:param funcs_f: file object of the functions file.
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:return: List of test suite dependencies, test function dispatch code, function code and
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a dict with function identifiers and arguments info.
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"""
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suite_headers = ''
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suite_deps = []
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suite_functions = ''
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func_info = {}
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function_idx = 0
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dispatch_code = ''
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for line in funcs_f:
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if re.search(BEGIN_HEADER_REGEX, line):
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headers = parse_suite_headers(funcs_f)
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suite_headers += headers
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elif re.search(BEGIN_DEP_REGEX, line):
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deps = parse_suite_deps(funcs_f)
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suite_deps += deps
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elif re.search(BEGIN_CASE_REGEX, line):
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deps = parse_function_deps(line)
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func_name, args, func_code, func_dispatch = parse_function_code(funcs_f, deps, suite_deps)
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suite_functions += func_code
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# Generate dispatch code and enumeration info
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assert func_name not in func_info, "file: %s - function %s re-declared at line %d" % \
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(funcs_f.name, func_name, funcs_f.line_no)
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func_info[func_name] = (function_idx, args)
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dispatch_code += '/* Function Id: %d */\n' % function_idx
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dispatch_code += func_dispatch
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function_idx += 1
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ifdef, endif = gen_deps(suite_deps)
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func_code = ifdef + suite_headers + suite_functions + endif
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return suite_deps, dispatch_code, func_code, func_info
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def escaped_split(str, ch):
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"""
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Split str on character ch but ignore escaped \{ch}
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Since return value is used to write back to the intermediate data file.
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Any escape characters in the input are retained in the output.
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:param str: String to split
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:param ch: split character
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:return: List of splits
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"""
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if len(ch) > 1:
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raise ValueError('Expected split character. Found string!')
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out = []
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part = ''
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escape = False
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for i in range(len(str)):
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if not escape and str[i] == ch:
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out.append(part)
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part = ''
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else:
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part += str[i]
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escape = not escape and str[i] == '\\'
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if len(part):
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out.append(part)
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return out
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def parse_test_data(data_f, debug=False):
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"""
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Parses .data file
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:param data_f: file object of the data file.
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:return: Generator that yields test name, function name, dependency list and function argument list.
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"""
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STATE_READ_NAME = 0
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STATE_READ_ARGS = 1
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state = STATE_READ_NAME
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deps = []
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name = ''
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for line in data_f:
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line = line.strip()
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if len(line) and line[0] == '#': # Skip comments
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continue
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# Blank line indicates end of test
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if len(line) == 0:
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assert state != STATE_READ_ARGS, "Newline before arguments. " \
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"Test function and arguments missing for %s" % name
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continue
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if state == STATE_READ_NAME:
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# Read test name
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name = line
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state = STATE_READ_ARGS
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elif state == STATE_READ_ARGS:
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# Check dependencies
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m = re.search('depends_on\:(.*)', line)
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if m:
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deps = [x.strip() for x in m.group(1).split(':') if len(x.strip())]
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else:
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# Read test vectors
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parts = escaped_split(line, ':')
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function = parts[0]
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args = parts[1:]
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yield name, function, deps, args
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deps = []
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state = STATE_READ_NAME
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assert state != STATE_READ_ARGS, "Newline before arguments. " \
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"Test function and arguments missing for %s" % name
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def gen_dep_check(dep_id, dep):
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"""
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Generate code for the dependency.
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:param dep_id: Dependency identifier
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:param dep: Dependency macro
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:return: Dependency check code
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"""
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assert dep_id > -1, "Dependency Id should be a positive integer."
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noT, dep = ('!', dep[1:]) if dep[0] == '!' else ('', dep)
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assert len(dep) > 0, "Dependency should not be an empty string."
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dep_check = '''
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case {id}:
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{{
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#if {noT}defined({macro})
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ret = DEPENDENCY_SUPPORTED;
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#else
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ret = DEPENDENCY_NOT_SUPPORTED;
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#endif
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}}
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break;'''.format(noT=noT, macro=dep, id=dep_id)
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return dep_check
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def gen_expression_check(exp_id, exp):
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"""
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Generates code for expression check
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:param exp_id: Expression Identifier
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:param exp: Expression/Macro
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:return: Expression check code
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"""
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assert exp_id > -1, "Expression Id should be a positive integer."
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assert len(exp) > 0, "Expression should not be an empty string."
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exp_code = '''
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case {exp_id}:
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{{
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*out_value = {expression};
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}}
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break;'''.format(exp_id=exp_id, expression=exp)
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return exp_code
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def write_deps(out_data_f, test_deps, unique_deps):
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"""
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Write dependencies to intermediate test data file.
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It also returns dependency check code.
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:param out_data_f: Output intermediate data file
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:param test_deps: Dependencies
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:param unique_deps: Mutable list to track unique dependencies that are global to this re-entrant function.
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:return: returns dependency check code.
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"""
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dep_check_code = ''
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if len(test_deps):
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out_data_f.write('depends_on')
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for dep in test_deps:
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if dep not in unique_deps:
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unique_deps.append(dep)
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dep_id = unique_deps.index(dep)
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dep_check_code += gen_dep_check(dep_id, dep)
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else:
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dep_id = unique_deps.index(dep)
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out_data_f.write(':' + str(dep_id))
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out_data_f.write('\n')
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return dep_check_code
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def write_parameters(out_data_f, test_args, func_args, unique_expressions):
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"""
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Writes test parameters to the intermediate data file.
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Also generates expression code.
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:param out_data_f: Output intermediate data file
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:param test_args: Test parameters
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:param func_args: Function arguments
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:param unique_expressions: Mutable list to track unique expressions that are global to this re-entrant function.
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:return: Returns expression check code.
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"""
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expression_code = ''
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for i in xrange(len(test_args)):
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typ = func_args[i]
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val = test_args[i]
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# check if val is a non literal int val
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if typ == 'int' and not re.match('(\d+$)|((0x)?[0-9a-fA-F]+$)', val): # its an expression
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typ = 'exp'
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if val not in unique_expressions:
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unique_expressions.append(val)
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# exp_id can be derived from len(). But for readability and consistency with case of existing let's
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# use index().
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exp_id = unique_expressions.index(val)
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expression_code += gen_expression_check(exp_id, val)
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val = exp_id
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else:
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val = unique_expressions.index(val)
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out_data_f.write(':' + typ + ':' + str(val))
|
|
out_data_f.write('\n')
|
|
return expression_code
|
|
|
|
|
|
def gen_suite_deps_checks(suite_deps, dep_check_code, expression_code):
|
|
"""
|
|
Adds preprocessor checks for test suite dependencies.
|
|
|
|
:param suite_deps: Test suite dependencies read from the .functions file.
|
|
:param dep_check_code: Dependency check code
|
|
:param expression_code: Expression check code
|
|
:return: Dependency and expression code guarded by test suite dependencies.
|
|
"""
|
|
if len(suite_deps):
|
|
ifdef = gen_deps_one_line(suite_deps)
|
|
dep_check_code = '''
|
|
{ifdef}
|
|
{code}
|
|
#endif
|
|
'''.format(ifdef=ifdef, code=dep_check_code)
|
|
expression_code = '''
|
|
{ifdef}
|
|
{code}
|
|
#endif
|
|
'''.format(ifdef=ifdef, code=expression_code)
|
|
return dep_check_code, expression_code
|
|
|
|
|
|
def gen_from_test_data(data_f, out_data_f, func_info, suite_deps):
|
|
"""
|
|
Generates dependency checks, expression code and intermediate data file from test data file.
|
|
|
|
:param data_f: Data file object
|
|
:param out_data_f:Output intermediate data file
|
|
:param func_info: Dict keyed by function and with function id and arguments info
|
|
:param suite_deps: Test suite deps
|
|
:return: Returns dependency and expression check code
|
|
"""
|
|
unique_deps = []
|
|
unique_expressions = []
|
|
dep_check_code = ''
|
|
expression_code = ''
|
|
for test_name, function_name, test_deps, test_args in parse_test_data(data_f):
|
|
out_data_f.write(test_name + '\n')
|
|
|
|
# Write deps
|
|
dep_check_code += write_deps(out_data_f, test_deps, unique_deps)
|
|
|
|
# Write test function name
|
|
test_function_name = 'test_' + function_name
|
|
assert test_function_name in func_info, "Function %s not found!" % test_function_name
|
|
func_id, func_args = func_info[test_function_name]
|
|
out_data_f.write(str(func_id))
|
|
|
|
# Write parameters
|
|
assert len(test_args) == len(func_args), \
|
|
"Invalid number of arguments in test %s. See function %s signature." % (test_name, function_name)
|
|
expression_code += write_parameters(out_data_f, test_args, func_args, unique_expressions)
|
|
|
|
# Write a newline as test case separator
|
|
out_data_f.write('\n')
|
|
|
|
dep_check_code, expression_code = gen_suite_deps_checks(suite_deps, dep_check_code, expression_code)
|
|
return dep_check_code, expression_code
|
|
|
|
|
|
def generate_code(funcs_file, data_file, template_file, platform_file, help_file, suites_dir, c_file, out_data_file):
|
|
"""
|
|
Generate mbed-os test code.
|
|
|
|
:param funcs_file: Functions file object
|
|
:param data_file: Data file object
|
|
:param template_file: Template file object
|
|
:param platform_file: Platform file object
|
|
:param help_file: Helper functions file object
|
|
:param suites_dir: Test suites dir
|
|
:param c_file: Output C file object
|
|
:param out_data_file: Output intermediate data file object
|
|
:return:
|
|
"""
|
|
for name, path in [('Functions file', funcs_file),
|
|
('Data file', data_file),
|
|
('Template file', template_file),
|
|
('Platform file', platform_file),
|
|
('Help code file', help_file),
|
|
('Suites dir', suites_dir)]:
|
|
if not os.path.exists(path):
|
|
raise IOError("ERROR: %s [%s] not found!" % (name, path))
|
|
|
|
snippets = {'generator_script' : os.path.basename(__file__)}
|
|
|
|
# Read helpers
|
|
with open(help_file, 'r') as help_f, open(platform_file, 'r') as platform_f:
|
|
snippets['test_common_helper_file'] = help_file
|
|
snippets['test_common_helpers'] = help_f.read()
|
|
snippets['test_platform_file'] = platform_file
|
|
snippets['platform_code'] = platform_f.read().replace('DATA_FILE',
|
|
out_data_file.replace('\\', '\\\\')) # escape '\'
|
|
|
|
# Function code
|
|
with FileWrapper(funcs_file) as funcs_f, open(data_file, 'r') as data_f, open(out_data_file, 'w') as out_data_f:
|
|
suite_deps, dispatch_code, func_code, func_info = parse_functions(funcs_f)
|
|
snippets['functions_code'] = func_code
|
|
snippets['dispatch_code'] = dispatch_code
|
|
dep_check_code, expression_code = gen_from_test_data(data_f, out_data_f, func_info, suite_deps)
|
|
snippets['dep_check_code'] = dep_check_code
|
|
snippets['expression_code'] = expression_code
|
|
|
|
snippets['test_file'] = c_file
|
|
snippets['test_main_file'] = template_file
|
|
snippets['test_case_file'] = funcs_file
|
|
snippets['test_case_data_file'] = data_file
|
|
# Read Template
|
|
# Add functions
|
|
#
|
|
with open(template_file, 'r') as template_f, open(c_file, 'w') as c_f:
|
|
line_no = 1
|
|
for line in template_f.readlines():
|
|
snippets['line_no'] = line_no + 1 # Increment as it sets next line number
|
|
code = line.format(**snippets)
|
|
c_f.write(code)
|
|
line_no += 1
|
|
|
|
|
|
def check_cmd():
|
|
"""
|
|
Command line parser.
|
|
|
|
:return:
|
|
"""
|
|
parser = argparse.ArgumentParser(description='Generate code for mbed-os tests.')
|
|
|
|
parser.add_argument("-f", "--functions-file",
|
|
dest="funcs_file",
|
|
help="Functions file",
|
|
metavar="FUNCTIONS",
|
|
required=True)
|
|
|
|
parser.add_argument("-d", "--data-file",
|
|
dest="data_file",
|
|
help="Data file",
|
|
metavar="DATA",
|
|
required=True)
|
|
|
|
parser.add_argument("-t", "--template-file",
|
|
dest="template_file",
|
|
help="Template file",
|
|
metavar="TEMPLATE",
|
|
required=True)
|
|
|
|
parser.add_argument("-s", "--suites-dir",
|
|
dest="suites_dir",
|
|
help="Suites dir",
|
|
metavar="SUITES",
|
|
required=True)
|
|
|
|
parser.add_argument("--help-file",
|
|
dest="help_file",
|
|
help="Help file",
|
|
metavar="HELPER",
|
|
required=True)
|
|
|
|
parser.add_argument("-p", "--platform-file",
|
|
dest="platform_file",
|
|
help="Platform code file",
|
|
metavar="PLATFORM_FILE",
|
|
required=True)
|
|
|
|
parser.add_argument("-o", "--out-dir",
|
|
dest="out_dir",
|
|
help="Dir where generated code and scripts are copied",
|
|
metavar="OUT_DIR",
|
|
required=True)
|
|
|
|
args = parser.parse_args()
|
|
|
|
data_file_name = os.path.basename(args.data_file)
|
|
data_name = os.path.splitext(data_file_name)[0]
|
|
|
|
out_c_file = os.path.join(args.out_dir, data_name + '.c')
|
|
out_data_file = os.path.join(args.out_dir, data_file_name)
|
|
|
|
out_c_file_dir = os.path.dirname(out_c_file)
|
|
out_data_file_dir = os.path.dirname(out_data_file)
|
|
for d in [out_c_file_dir, out_data_file_dir]:
|
|
if not os.path.exists(d):
|
|
os.makedirs(d)
|
|
|
|
generate_code(args.funcs_file, args.data_file, args.template_file, args.platform_file,
|
|
args.help_file, args.suites_dir, out_c_file, out_data_file)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
check_cmd()
|