1146 lines
42 KiB
Python
1146 lines
42 KiB
Python
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#!/usr/bin/env python3
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# Test suites code generator.
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#
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# Copyright The Mbed TLS Contributors
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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 script is a key part of Mbed TLS test suites framework. For
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understanding the script it is important to understand the
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framework. This doc string contains a summary of the framework
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and explains the function of this script.
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Mbed TLS test suites:
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=====================
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Scope:
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------
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The test suites focus on unit testing the crypto primitives and also
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include x509 parser tests. Tests can be added to test any Mbed TLS
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module. However, the framework is not capable of testing SSL
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protocol, since that requires full stack execution and that is best
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tested as part of the system test.
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Test case definition:
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---------------------
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Tests are defined in a test_suite_<module>[.<optional sub module>].data
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file. A test definition contains:
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test name
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optional build macro dependencies
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test function
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test parameters
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Test dependencies are build macros that can be specified to indicate
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the build config in which the test is valid. For example if a test
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depends on a feature that is only enabled by defining a macro. Then
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that macro should be specified as a dependency of the test.
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Test function is the function that implements the test steps. This
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function is specified for different tests that perform same steps
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with different parameters.
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Test parameters are specified in string form separated by ':'.
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Parameters can be of type string, binary data specified as hex
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string and integer constants specified as integer, macro or
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as an expression. Following is an example test definition:
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AES 128 GCM Encrypt and decrypt 8 bytes
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depends_on:MBEDTLS_AES_C:MBEDTLS_GCM_C
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enc_dec_buf:MBEDTLS_CIPHER_AES_128_GCM:"AES-128-GCM":128:8:-1
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Test functions:
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---------------
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Test functions are coded in C in test_suite_<module>.function files.
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Functions file is itself not compilable and contains special
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format patterns to specify test suite dependencies, start and end
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of functions and function dependencies. Check any existing functions
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file for example.
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Execution:
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----------
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Tests are executed in 3 steps:
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- Generating test_suite_<module>[.<optional sub module>].c file
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for each corresponding .data file.
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- Building each source file into executables.
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- Running each executable and printing report.
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Generating C test source requires more than just the test functions.
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Following extras are required:
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- Process main()
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- Reading .data file and dispatching test cases.
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- Platform specific test case execution
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- Dependency checking
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- Integer expression evaluation
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- Test function dispatch
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Build dependencies and integer expressions (in the test parameters)
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are specified as strings in the .data file. Their run time value is
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not known at the generation stage. Hence, they need to be translated
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into run time evaluations. This script generates the run time checks
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for dependencies and integer expressions.
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Similarly, function names have to be translated into function calls.
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This script also generates code for function dispatch.
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The extra code mentioned here is either generated by this script
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or it comes from the input files: helpers file, platform file and
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the template file.
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Helper file:
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------------
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Helpers file contains common helper/utility functions and data.
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Platform file:
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--------------
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Platform file contains platform specific setup code and test case
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dispatch code. For example, host_test.function reads test data
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file from host's file system and dispatches tests.
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Template file:
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---------
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Template file for example main_test.function is a template C file in
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which generated code and code from input files is substituted to
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generate a compilable C file. It also contains skeleton functions for
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dependency checks, expression evaluation and function dispatch. These
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functions are populated with checks and return codes by this script.
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Template file contains "replacement" fields that are formatted
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strings processed by Python string.Template.substitute() method.
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This script:
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============
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Core function of this script is to fill the template file with
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code that is generated or read from helpers and platform files.
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This script replaces following fields in the template and generates
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the test source file:
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$test_common_helpers <-- All common code from helpers.function
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is substituted here.
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$functions_code <-- Test functions are substituted here
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from the input test_suit_xyz.function
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file. C preprocessor checks are generated
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for the build dependencies specified
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in the input file. This script also
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generates wrappers for the test
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functions with code to expand the
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string parameters read from the data
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file.
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$expression_code <-- This script enumerates the
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expressions in the .data file and
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generates code to handle enumerated
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expression Ids and return the values.
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$dep_check_code <-- This script enumerates all
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build dependencies and generate
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code to handle enumerated build
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dependency Id and return status: if
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the dependency is defined or not.
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$dispatch_code <-- This script enumerates the functions
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specified in the input test data file
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and generates the initializer for the
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function table in the template
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file.
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$platform_code <-- Platform specific setup and test
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dispatch code.
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"""
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import io
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import os
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import re
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import sys
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import string
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import argparse
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BEGIN_HEADER_REGEX = r'/\*\s*BEGIN_HEADER\s*\*/'
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END_HEADER_REGEX = r'/\*\s*END_HEADER\s*\*/'
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BEGIN_SUITE_HELPERS_REGEX = r'/\*\s*BEGIN_SUITE_HELPERS\s*\*/'
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END_SUITE_HELPERS_REGEX = r'/\*\s*END_SUITE_HELPERS\s*\*/'
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BEGIN_DEP_REGEX = r'BEGIN_DEPENDENCIES'
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END_DEP_REGEX = r'END_DEPENDENCIES'
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BEGIN_CASE_REGEX = r'/\*\s*BEGIN_CASE\s*(?P<depends_on>.*?)\s*\*/'
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END_CASE_REGEX = r'/\*\s*END_CASE\s*\*/'
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DEPENDENCY_REGEX = r'depends_on:(?P<dependencies>.*)'
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C_IDENTIFIER_REGEX = r'!?[a-z_][a-z0-9_]*'
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CONDITION_OPERATOR_REGEX = r'[!=]=|[<>]=?'
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# forbid 0ddd which might be accidentally octal or accidentally decimal
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CONDITION_VALUE_REGEX = r'[-+]?(0x[0-9a-f]+|0|[1-9][0-9]*)'
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CONDITION_REGEX = r'({})(?:\s*({})\s*({}))?$'.format(C_IDENTIFIER_REGEX,
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CONDITION_OPERATOR_REGEX,
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CONDITION_VALUE_REGEX)
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TEST_FUNCTION_VALIDATION_REGEX = r'\s*void\s+(?P<func_name>\w+)\s*\('
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INT_CHECK_REGEX = r'int\s+.*'
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CHAR_CHECK_REGEX = r'char\s*\*\s*.*'
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DATA_T_CHECK_REGEX = r'data_t\s*\*\s*.*'
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FUNCTION_ARG_LIST_END_REGEX = r'.*\)'
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EXIT_LABEL_REGEX = r'^exit:'
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class GeneratorInputError(Exception):
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"""
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Exception to indicate error in the input files to this script.
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This includes missing patterns, test function names and other
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parsing errors.
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"""
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pass
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class FileWrapper(io.FileIO):
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"""
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This class extends built-in io.FileIO class with attribute line_no,
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that indicates line number for the line that is read.
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"""
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def __init__(self, file_name):
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"""
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Instantiate the base class and initialize the line number to 0.
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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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Python 2 iterator method. This method overrides base class's
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next method and extends the next method to count the line
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numbers as each line is read.
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It works for both Python 2 and Python 3 by checking iterator
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method name in the base iterator object.
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:return: Line read from file.
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"""
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parent = super(FileWrapper, self)
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if hasattr(parent, '__next__'):
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line = parent.__next__() # Python 3
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else:
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line = parent.next() # Python 2 # pylint: disable=no-member
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if line is not None:
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self._line_no += 1
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# Convert byte array to string with correct encoding and
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# strip any whitespaces added in the decoding process.
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return line.decode(sys.getdefaultencoding()).rstrip() + '\n'
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return None
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# Python 3 iterator method
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__next__ = next
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def get_line_no(self):
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"""
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Gives current line number.
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"""
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return self._line_no
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line_no = property(get_line_no)
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def split_dep(dep):
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"""
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Split NOT character '!' from dependency. Used by gen_dependencies()
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:param dep: Dependency list
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:return: string tuple. Ex: ('!', MACRO) for !MACRO and ('', MACRO) for
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MACRO.
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"""
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return ('!', dep[1:]) if dep[0] == '!' else ('', dep)
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def gen_dependencies(dependencies):
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"""
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Test suite data and functions specifies compile time dependencies.
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This function generates C preprocessor code from the input
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dependency list. Caller uses the generated preprocessor code to
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wrap dependent code.
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A dependency in the input list can have a leading '!' character
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to negate a condition. '!' is separated from the dependency using
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function split_dep() and proper preprocessor check is generated
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accordingly.
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:param dependencies: List of dependencies.
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:return: if defined and endif code with macro annotations for
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readability.
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"""
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dep_start = ''.join(['#if %sdefined(%s)\n' % (x, y) for x, y in
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map(split_dep, dependencies)])
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dep_end = ''.join(['#endif /* %s */\n' %
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x for x in reversed(dependencies)])
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return dep_start, dep_end
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def gen_dependencies_one_line(dependencies):
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"""
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Similar to gen_dependencies() but generates dependency checks in one line.
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Useful for generating code with #else block.
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:param dependencies: List of dependencies.
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:return: Preprocessor check code
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"""
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defines = '#if ' if dependencies else ''
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defines += ' && '.join(['%sdefined(%s)' % (x, y) for x, y in map(
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split_dep, dependencies)])
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return defines
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def gen_function_wrapper(name, local_vars, args_dispatch):
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"""
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Creates test function wrapper code. A wrapper has the code to
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unpack parameters from parameters[] array.
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:param name: Test function name
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:param local_vars: Local variables declaration code
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:param args_dispatch: List of dispatch arguments.
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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}{locals}
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{name}( {args} );
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}}
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'''.format(name=name,
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unused_params='' if args_dispatch else ' (void)params;\n',
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args=', '.join(args_dispatch),
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locals=local_vars)
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return wrapper
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def gen_dispatch(name, dependencies):
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"""
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Test suite code template main_test.function defines a C function
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array to contain test case functions. This function generates an
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initializer entry for a function in that array. The entry is
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composed of a compile time check for the test function
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dependencies. At compile time the test function is assigned when
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dependencies are met, else NULL is assigned.
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:param name: Test function name
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:param dependencies: List of dependencies
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:return: Dispatch code.
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"""
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if dependencies:
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preprocessor_check = gen_dependencies_one_line(dependencies)
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dispatch_code = '''
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{preprocessor_check}
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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(preprocessor_check=preprocessor_check, 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_until_pattern(funcs_f, end_regex):
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"""
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Matches pattern end_regex to the lines read from the file object.
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Returns the lines read until end pattern is matched.
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:param funcs_f: file object for .function file
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:param end_regex: Pattern to stop parsing
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:return: Lines read before the end pattern
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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_regex, line):
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break
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headers += line
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else:
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raise GeneratorInputError("file: %s - end pattern [%s] not found!" %
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(funcs_f.name, end_regex))
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return headers
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def validate_dependency(dependency):
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||
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"""
|
||
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Validates a C macro and raises GeneratorInputError on invalid input.
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||
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:param dependency: Input macro dependency
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:return: input dependency stripped of leading & trailing white spaces.
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|
|
"""
|
||
|
|
dependency = dependency.strip()
|
||
|
|
if not re.match(CONDITION_REGEX, dependency, re.I):
|
||
|
|
raise GeneratorInputError('Invalid dependency %s' % dependency)
|
||
|
|
return dependency
|
||
|
|
|
||
|
|
|
||
|
|
def parse_dependencies(inp_str):
|
||
|
|
"""
|
||
|
|
Parses dependencies out of inp_str, validates them and returns a
|
||
|
|
list of macros.
|
||
|
|
|
||
|
|
:param inp_str: Input string with macros delimited by ':'.
|
||
|
|
:return: list of dependencies
|
||
|
|
"""
|
||
|
|
dependencies = list(map(validate_dependency, inp_str.split(':')))
|
||
|
|
return dependencies
|
||
|
|
|
||
|
|
|
||
|
|
def parse_suite_dependencies(funcs_f):
|
||
|
|
"""
|
||
|
|
Parses test suite dependencies specified at the top of a
|
||
|
|
.function file, that starts with pattern BEGIN_DEPENDENCIES
|
||
|
|
and end with END_DEPENDENCIES. Dependencies are specified
|
||
|
|
after pattern 'depends_on:' and are delimited by ':'.
|
||
|
|
|
||
|
|
:param funcs_f: file object for .function file
|
||
|
|
:return: List of test suite dependencies.
|
||
|
|
"""
|
||
|
|
dependencies = []
|
||
|
|
for line in funcs_f:
|
||
|
|
match = re.search(DEPENDENCY_REGEX, line.strip())
|
||
|
|
if match:
|
||
|
|
try:
|
||
|
|
dependencies = parse_dependencies(match.group('dependencies'))
|
||
|
|
except GeneratorInputError as error:
|
||
|
|
raise GeneratorInputError(
|
||
|
|
str(error) + " - %s:%d" % (funcs_f.name, funcs_f.line_no))
|
||
|
|
if re.search(END_DEP_REGEX, line):
|
||
|
|
break
|
||
|
|
else:
|
||
|
|
raise GeneratorInputError("file: %s - end dependency pattern [%s]"
|
||
|
|
" not found!" % (funcs_f.name,
|
||
|
|
END_DEP_REGEX))
|
||
|
|
|
||
|
|
return dependencies
|
||
|
|
|
||
|
|
|
||
|
|
def parse_function_dependencies(line):
|
||
|
|
"""
|
||
|
|
Parses function dependencies, that are in the same line as
|
||
|
|
comment BEGIN_CASE. Dependencies are specified after pattern
|
||
|
|
'depends_on:' and are delimited by ':'.
|
||
|
|
|
||
|
|
:param line: Line from .function file that has dependencies.
|
||
|
|
:return: List of dependencies.
|
||
|
|
"""
|
||
|
|
dependencies = []
|
||
|
|
match = re.search(BEGIN_CASE_REGEX, line)
|
||
|
|
dep_str = match.group('depends_on')
|
||
|
|
if dep_str:
|
||
|
|
match = re.search(DEPENDENCY_REGEX, dep_str)
|
||
|
|
if match:
|
||
|
|
dependencies += parse_dependencies(match.group('dependencies'))
|
||
|
|
|
||
|
|
return dependencies
|
||
|
|
|
||
|
|
|
||
|
|
def parse_function_arguments(line):
|
||
|
|
"""
|
||
|
|
Parses test function signature for validation and generates
|
||
|
|
a dispatch wrapper function that translates input test vectors
|
||
|
|
read from the data file into test function arguments.
|
||
|
|
|
||
|
|
:param line: Line from .function file that has a function
|
||
|
|
signature.
|
||
|
|
:return: argument list, local variables for
|
||
|
|
wrapper function and argument dispatch code.
|
||
|
|
"""
|
||
|
|
args = []
|
||
|
|
local_vars = ''
|
||
|
|
args_dispatch = []
|
||
|
|
arg_idx = 0
|
||
|
|
# Remove characters before arguments
|
||
|
|
line = line[line.find('(') + 1:]
|
||
|
|
# Process arguments, ex: <type> arg1, <type> arg2 )
|
||
|
|
# This script assumes that the argument list is terminated by ')'
|
||
|
|
# i.e. the test functions will not have a function pointer
|
||
|
|
# argument.
|
||
|
|
for arg in line[:line.find(')')].split(','):
|
||
|
|
arg = arg.strip()
|
||
|
|
if arg == '':
|
||
|
|
continue
|
||
|
|
if re.search(INT_CHECK_REGEX, arg.strip()):
|
||
|
|
args.append('int')
|
||
|
|
args_dispatch.append('*( (int *) params[%d] )' % arg_idx)
|
||
|
|
elif re.search(CHAR_CHECK_REGEX, arg.strip()):
|
||
|
|
args.append('char*')
|
||
|
|
args_dispatch.append('(char *) params[%d]' % arg_idx)
|
||
|
|
elif re.search(DATA_T_CHECK_REGEX, arg.strip()):
|
||
|
|
args.append('hex')
|
||
|
|
# create a structure
|
||
|
|
pointer_initializer = '(uint8_t *) params[%d]' % arg_idx
|
||
|
|
len_initializer = '*( (uint32_t *) params[%d] )' % (arg_idx+1)
|
||
|
|
local_vars += """ data_t data%d = {%s, %s};
|
||
|
|
""" % (arg_idx, pointer_initializer, len_initializer)
|
||
|
|
|
||
|
|
args_dispatch.append('&data%d' % arg_idx)
|
||
|
|
arg_idx += 1
|
||
|
|
else:
|
||
|
|
raise ValueError("Test function arguments can only be 'int', "
|
||
|
|
"'char *' or 'data_t'\n%s" % line)
|
||
|
|
arg_idx += 1
|
||
|
|
|
||
|
|
return args, local_vars, args_dispatch
|
||
|
|
|
||
|
|
|
||
|
|
def generate_function_code(name, code, local_vars, args_dispatch,
|
||
|
|
dependencies):
|
||
|
|
"""
|
||
|
|
Generate function code with preprocessor checks and parameter dispatch
|
||
|
|
wrapper.
|
||
|
|
|
||
|
|
:param name: Function name
|
||
|
|
:param code: Function code
|
||
|
|
:param local_vars: Local variables for function wrapper
|
||
|
|
:param args_dispatch: Argument dispatch code
|
||
|
|
:param dependencies: Preprocessor dependencies list
|
||
|
|
:return: Final function code
|
||
|
|
"""
|
||
|
|
# Add exit label if not present
|
||
|
|
if code.find('exit:') == -1:
|
||
|
|
split_code = code.rsplit('}', 1)
|
||
|
|
if len(split_code) == 2:
|
||
|
|
code = """exit:
|
||
|
|
;
|
||
|
|
}""".join(split_code)
|
||
|
|
|
||
|
|
code += gen_function_wrapper(name, local_vars, args_dispatch)
|
||
|
|
preprocessor_check_start, preprocessor_check_end = \
|
||
|
|
gen_dependencies(dependencies)
|
||
|
|
return preprocessor_check_start + code + preprocessor_check_end
|
||
|
|
|
||
|
|
|
||
|
|
def parse_function_code(funcs_f, dependencies, suite_dependencies):
|
||
|
|
"""
|
||
|
|
Parses out a function from function file object and generates
|
||
|
|
function and dispatch code.
|
||
|
|
|
||
|
|
:param funcs_f: file object of the functions file.
|
||
|
|
:param dependencies: List of dependencies
|
||
|
|
:param suite_dependencies: List of test suite dependencies
|
||
|
|
:return: Function name, arguments, function code and dispatch code.
|
||
|
|
"""
|
||
|
|
line_directive = '#line %d "%s"\n' % (funcs_f.line_no + 1, funcs_f.name)
|
||
|
|
code = ''
|
||
|
|
has_exit_label = False
|
||
|
|
for line in funcs_f:
|
||
|
|
# Check function signature. Function signature may be split
|
||
|
|
# across multiple lines. Here we try to find the start of
|
||
|
|
# arguments list, then remove '\n's and apply the regex to
|
||
|
|
# detect function start.
|
||
|
|
up_to_arg_list_start = code + line[:line.find('(') + 1]
|
||
|
|
match = re.match(TEST_FUNCTION_VALIDATION_REGEX,
|
||
|
|
up_to_arg_list_start.replace('\n', ' '), re.I)
|
||
|
|
if match:
|
||
|
|
# check if we have full signature i.e. split in more lines
|
||
|
|
name = match.group('func_name')
|
||
|
|
if not re.match(FUNCTION_ARG_LIST_END_REGEX, line):
|
||
|
|
for lin in funcs_f:
|
||
|
|
line += lin
|
||
|
|
if re.search(FUNCTION_ARG_LIST_END_REGEX, line):
|
||
|
|
break
|
||
|
|
args, local_vars, args_dispatch = parse_function_arguments(
|
||
|
|
line)
|
||
|
|
code += line
|
||
|
|
break
|
||
|
|
code += line
|
||
|
|
else:
|
||
|
|
raise GeneratorInputError("file: %s - Test functions not found!" %
|
||
|
|
funcs_f.name)
|
||
|
|
|
||
|
|
# Prefix test function name with 'test_'
|
||
|
|
code = code.replace(name, 'test_' + name, 1)
|
||
|
|
name = 'test_' + name
|
||
|
|
|
||
|
|
for line in funcs_f:
|
||
|
|
if re.search(END_CASE_REGEX, line):
|
||
|
|
break
|
||
|
|
if not has_exit_label:
|
||
|
|
has_exit_label = \
|
||
|
|
re.search(EXIT_LABEL_REGEX, line.strip()) is not None
|
||
|
|
code += line
|
||
|
|
else:
|
||
|
|
raise GeneratorInputError("file: %s - end case pattern [%s] not "
|
||
|
|
"found!" % (funcs_f.name, END_CASE_REGEX))
|
||
|
|
|
||
|
|
code = line_directive + code
|
||
|
|
code = generate_function_code(name, code, local_vars, args_dispatch,
|
||
|
|
dependencies)
|
||
|
|
dispatch_code = gen_dispatch(name, suite_dependencies + dependencies)
|
||
|
|
return (name, args, code, dispatch_code)
|
||
|
|
|
||
|
|
|
||
|
|
def parse_functions(funcs_f):
|
||
|
|
"""
|
||
|
|
Parses a test_suite_xxx.function file and returns information
|
||
|
|
for generating a C source file for the test suite.
|
||
|
|
|
||
|
|
:param funcs_f: file object of the functions file.
|
||
|
|
:return: List of test suite dependencies, test function dispatch
|
||
|
|
code, function code and a dict with function identifiers
|
||
|
|
and arguments info.
|
||
|
|
"""
|
||
|
|
suite_helpers = ''
|
||
|
|
suite_dependencies = []
|
||
|
|
suite_functions = ''
|
||
|
|
func_info = {}
|
||
|
|
function_idx = 0
|
||
|
|
dispatch_code = ''
|
||
|
|
for line in funcs_f:
|
||
|
|
if re.search(BEGIN_HEADER_REGEX, line):
|
||
|
|
suite_helpers += parse_until_pattern(funcs_f, END_HEADER_REGEX)
|
||
|
|
elif re.search(BEGIN_SUITE_HELPERS_REGEX, line):
|
||
|
|
suite_helpers += parse_until_pattern(funcs_f,
|
||
|
|
END_SUITE_HELPERS_REGEX)
|
||
|
|
elif re.search(BEGIN_DEP_REGEX, line):
|
||
|
|
suite_dependencies += parse_suite_dependencies(funcs_f)
|
||
|
|
elif re.search(BEGIN_CASE_REGEX, line):
|
||
|
|
try:
|
||
|
|
dependencies = parse_function_dependencies(line)
|
||
|
|
except GeneratorInputError as error:
|
||
|
|
raise GeneratorInputError(
|
||
|
|
"%s:%d: %s" % (funcs_f.name, funcs_f.line_no,
|
||
|
|
str(error)))
|
||
|
|
func_name, args, func_code, func_dispatch =\
|
||
|
|
parse_function_code(funcs_f, dependencies, suite_dependencies)
|
||
|
|
suite_functions += func_code
|
||
|
|
# Generate dispatch code and enumeration info
|
||
|
|
if func_name in func_info:
|
||
|
|
raise GeneratorInputError(
|
||
|
|
"file: %s - function %s re-declared at line %d" %
|
||
|
|
(funcs_f.name, func_name, funcs_f.line_no))
|
||
|
|
func_info[func_name] = (function_idx, args)
|
||
|
|
dispatch_code += '/* Function Id: %d */\n' % function_idx
|
||
|
|
dispatch_code += func_dispatch
|
||
|
|
function_idx += 1
|
||
|
|
|
||
|
|
func_code = (suite_helpers +
|
||
|
|
suite_functions).join(gen_dependencies(suite_dependencies))
|
||
|
|
return suite_dependencies, dispatch_code, func_code, func_info
|
||
|
|
|
||
|
|
|
||
|
|
def escaped_split(inp_str, split_char):
|
||
|
|
"""
|
||
|
|
Split inp_str on character split_char but ignore if escaped.
|
||
|
|
Since, return value is used to write back to the intermediate
|
||
|
|
data file, any escape characters in the input are retained in the
|
||
|
|
output.
|
||
|
|
|
||
|
|
:param inp_str: String to split
|
||
|
|
:param split_char: Split character
|
||
|
|
:return: List of splits
|
||
|
|
"""
|
||
|
|
if len(split_char) > 1:
|
||
|
|
raise ValueError('Expected split character. Found string!')
|
||
|
|
out = re.sub(r'(\\.)|' + split_char,
|
||
|
|
lambda m: m.group(1) or '\n', inp_str,
|
||
|
|
len(inp_str)).split('\n')
|
||
|
|
out = [x for x in out if x]
|
||
|
|
return out
|
||
|
|
|
||
|
|
|
||
|
|
def parse_test_data(data_f):
|
||
|
|
"""
|
||
|
|
Parses .data file for each test case name, test function name,
|
||
|
|
test dependencies and test arguments. This information is
|
||
|
|
correlated with the test functions file for generating an
|
||
|
|
intermediate data file replacing the strings for test function
|
||
|
|
names, dependencies and integer constant expressions with
|
||
|
|
identifiers. Mainly for optimising space for on-target
|
||
|
|
execution.
|
||
|
|
|
||
|
|
:param data_f: file object of the data file.
|
||
|
|
:return: Generator that yields test name, function name,
|
||
|
|
dependency list and function argument list.
|
||
|
|
"""
|
||
|
|
__state_read_name = 0
|
||
|
|
__state_read_args = 1
|
||
|
|
state = __state_read_name
|
||
|
|
dependencies = []
|
||
|
|
name = ''
|
||
|
|
for line in data_f:
|
||
|
|
line = line.strip()
|
||
|
|
# Skip comments
|
||
|
|
if line.startswith('#'):
|
||
|
|
continue
|
||
|
|
|
||
|
|
# Blank line indicates end of test
|
||
|
|
if not line:
|
||
|
|
if state == __state_read_args:
|
||
|
|
raise GeneratorInputError("[%s:%d] Newline before arguments. "
|
||
|
|
"Test function and arguments "
|
||
|
|
"missing for %s" %
|
||
|
|
(data_f.name, data_f.line_no, name))
|
||
|
|
continue
|
||
|
|
|
||
|
|
if state == __state_read_name:
|
||
|
|
# Read test name
|
||
|
|
name = line
|
||
|
|
state = __state_read_args
|
||
|
|
elif state == __state_read_args:
|
||
|
|
# Check dependencies
|
||
|
|
match = re.search(DEPENDENCY_REGEX, line)
|
||
|
|
if match:
|
||
|
|
try:
|
||
|
|
dependencies = parse_dependencies(
|
||
|
|
match.group('dependencies'))
|
||
|
|
except GeneratorInputError as error:
|
||
|
|
raise GeneratorInputError(
|
||
|
|
str(error) + " - %s:%d" %
|
||
|
|
(data_f.name, data_f.line_no))
|
||
|
|
else:
|
||
|
|
# Read test vectors
|
||
|
|
parts = escaped_split(line, ':')
|
||
|
|
test_function = parts[0]
|
||
|
|
args = parts[1:]
|
||
|
|
yield name, test_function, dependencies, args
|
||
|
|
dependencies = []
|
||
|
|
state = __state_read_name
|
||
|
|
if state == __state_read_args:
|
||
|
|
raise GeneratorInputError("[%s:%d] Newline before arguments. "
|
||
|
|
"Test function and arguments missing for "
|
||
|
|
"%s" % (data_f.name, data_f.line_no, name))
|
||
|
|
|
||
|
|
|
||
|
|
def gen_dep_check(dep_id, dep):
|
||
|
|
"""
|
||
|
|
Generate code for checking dependency with the associated
|
||
|
|
identifier.
|
||
|
|
|
||
|
|
:param dep_id: Dependency identifier
|
||
|
|
:param dep: Dependency macro
|
||
|
|
:return: Dependency check code
|
||
|
|
"""
|
||
|
|
if dep_id < 0:
|
||
|
|
raise GeneratorInputError("Dependency Id should be a positive "
|
||
|
|
"integer.")
|
||
|
|
_not, dep = ('!', dep[1:]) if dep[0] == '!' else ('', dep)
|
||
|
|
if not dep:
|
||
|
|
raise GeneratorInputError("Dependency should not be an empty string.")
|
||
|
|
|
||
|
|
dependency = re.match(CONDITION_REGEX, dep, re.I)
|
||
|
|
if not dependency:
|
||
|
|
raise GeneratorInputError('Invalid dependency %s' % dep)
|
||
|
|
|
||
|
|
_defined = '' if dependency.group(2) else 'defined'
|
||
|
|
_cond = dependency.group(2) if dependency.group(2) else ''
|
||
|
|
_value = dependency.group(3) if dependency.group(3) else ''
|
||
|
|
|
||
|
|
dep_check = '''
|
||
|
|
case {id}:
|
||
|
|
{{
|
||
|
|
#if {_not}{_defined}({macro}{_cond}{_value})
|
||
|
|
ret = DEPENDENCY_SUPPORTED;
|
||
|
|
#else
|
||
|
|
ret = DEPENDENCY_NOT_SUPPORTED;
|
||
|
|
#endif
|
||
|
|
}}
|
||
|
|
break;'''.format(_not=_not, _defined=_defined,
|
||
|
|
macro=dependency.group(1), id=dep_id,
|
||
|
|
_cond=_cond, _value=_value)
|
||
|
|
return dep_check
|
||
|
|
|
||
|
|
|
||
|
|
def gen_expression_check(exp_id, exp):
|
||
|
|
"""
|
||
|
|
Generates code for evaluating an integer expression using
|
||
|
|
associated expression Id.
|
||
|
|
|
||
|
|
:param exp_id: Expression Identifier
|
||
|
|
:param exp: Expression/Macro
|
||
|
|
:return: Expression check code
|
||
|
|
"""
|
||
|
|
if exp_id < 0:
|
||
|
|
raise GeneratorInputError("Expression Id should be a positive "
|
||
|
|
"integer.")
|
||
|
|
if not exp:
|
||
|
|
raise GeneratorInputError("Expression should not be an empty string.")
|
||
|
|
exp_code = '''
|
||
|
|
case {exp_id}:
|
||
|
|
{{
|
||
|
|
*out_value = {expression};
|
||
|
|
}}
|
||
|
|
break;'''.format(exp_id=exp_id, expression=exp)
|
||
|
|
return exp_code
|
||
|
|
|
||
|
|
|
||
|
|
def write_dependencies(out_data_f, test_dependencies, unique_dependencies):
|
||
|
|
"""
|
||
|
|
Write dependencies to intermediate test data file, replacing
|
||
|
|
the string form with identifiers. Also, generates dependency
|
||
|
|
check code.
|
||
|
|
|
||
|
|
:param out_data_f: Output intermediate data file
|
||
|
|
:param test_dependencies: Dependencies
|
||
|
|
:param unique_dependencies: Mutable list to track unique dependencies
|
||
|
|
that are global to this re-entrant function.
|
||
|
|
:return: returns dependency check code.
|
||
|
|
"""
|
||
|
|
dep_check_code = ''
|
||
|
|
if test_dependencies:
|
||
|
|
out_data_f.write('depends_on')
|
||
|
|
for dep in test_dependencies:
|
||
|
|
if dep not in unique_dependencies:
|
||
|
|
unique_dependencies.append(dep)
|
||
|
|
dep_id = unique_dependencies.index(dep)
|
||
|
|
dep_check_code += gen_dep_check(dep_id, dep)
|
||
|
|
else:
|
||
|
|
dep_id = unique_dependencies.index(dep)
|
||
|
|
out_data_f.write(':' + str(dep_id))
|
||
|
|
out_data_f.write('\n')
|
||
|
|
return dep_check_code
|
||
|
|
|
||
|
|
|
||
|
|
def write_parameters(out_data_f, test_args, func_args, unique_expressions):
|
||
|
|
"""
|
||
|
|
Writes test parameters to the intermediate data file, replacing
|
||
|
|
the string form with identifiers. Also, generates expression
|
||
|
|
check code.
|
||
|
|
|
||
|
|
:param out_data_f: Output intermediate data file
|
||
|
|
:param test_args: Test parameters
|
||
|
|
:param func_args: Function arguments
|
||
|
|
:param unique_expressions: Mutable list to track unique
|
||
|
|
expressions that are global to this re-entrant function.
|
||
|
|
:return: Returns expression check code.
|
||
|
|
"""
|
||
|
|
expression_code = ''
|
||
|
|
for i, _ in enumerate(test_args):
|
||
|
|
typ = func_args[i]
|
||
|
|
val = test_args[i]
|
||
|
|
|
||
|
|
# check if val is a non literal int val (i.e. an expression)
|
||
|
|
if typ == 'int' and not re.match(r'(\d+|0x[0-9a-f]+)$',
|
||
|
|
val, re.I):
|
||
|
|
typ = 'exp'
|
||
|
|
if val not in unique_expressions:
|
||
|
|
unique_expressions.append(val)
|
||
|
|
# exp_id can be derived from len(). But for
|
||
|
|
# readability and consistency with case of existing
|
||
|
|
# let's use index().
|
||
|
|
exp_id = unique_expressions.index(val)
|
||
|
|
expression_code += gen_expression_check(exp_id, val)
|
||
|
|
val = exp_id
|
||
|
|
else:
|
||
|
|
val = unique_expressions.index(val)
|
||
|
|
out_data_f.write(':' + typ + ':' + str(val))
|
||
|
|
out_data_f.write('\n')
|
||
|
|
return expression_code
|
||
|
|
|
||
|
|
|
||
|
|
def gen_suite_dep_checks(suite_dependencies, dep_check_code, expression_code):
|
||
|
|
"""
|
||
|
|
Generates preprocessor checks for test suite dependencies.
|
||
|
|
|
||
|
|
:param suite_dependencies: Test suite dependencies read from the
|
||
|
|
.function 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 suite_dependencies:
|
||
|
|
preprocessor_check = gen_dependencies_one_line(suite_dependencies)
|
||
|
|
dep_check_code = '''
|
||
|
|
{preprocessor_check}
|
||
|
|
{code}
|
||
|
|
#endif
|
||
|
|
'''.format(preprocessor_check=preprocessor_check, code=dep_check_code)
|
||
|
|
expression_code = '''
|
||
|
|
{preprocessor_check}
|
||
|
|
{code}
|
||
|
|
#endif
|
||
|
|
'''.format(preprocessor_check=preprocessor_check, code=expression_code)
|
||
|
|
return dep_check_code, expression_code
|
||
|
|
|
||
|
|
|
||
|
|
def gen_from_test_data(data_f, out_data_f, func_info, suite_dependencies):
|
||
|
|
"""
|
||
|
|
This function reads test case name, dependencies and test vectors
|
||
|
|
from the .data file. This information is correlated with the test
|
||
|
|
functions file for generating an intermediate data file replacing
|
||
|
|
the strings for test function names, dependencies and integer
|
||
|
|
constant expressions with identifiers. Mainly for optimising
|
||
|
|
space for on-target execution.
|
||
|
|
It also generates test case dependency check code and expression
|
||
|
|
evaluation code.
|
||
|
|
|
||
|
|
: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_dependencies: Test suite dependencies
|
||
|
|
:return: Returns dependency and expression check code
|
||
|
|
"""
|
||
|
|
unique_dependencies = []
|
||
|
|
unique_expressions = []
|
||
|
|
dep_check_code = ''
|
||
|
|
expression_code = ''
|
||
|
|
for test_name, function_name, test_dependencies, test_args in \
|
||
|
|
parse_test_data(data_f):
|
||
|
|
out_data_f.write(test_name + '\n')
|
||
|
|
|
||
|
|
# Write dependencies
|
||
|
|
dep_check_code += write_dependencies(out_data_f, test_dependencies,
|
||
|
|
unique_dependencies)
|
||
|
|
|
||
|
|
# Write test function name
|
||
|
|
test_function_name = 'test_' + function_name
|
||
|
|
if test_function_name not in func_info:
|
||
|
|
raise GeneratorInputError("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
|
||
|
|
if len(test_args) != len(func_args):
|
||
|
|
raise GeneratorInputError("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_dep_checks(
|
||
|
|
suite_dependencies, dep_check_code, expression_code)
|
||
|
|
return dep_check_code, expression_code
|
||
|
|
|
||
|
|
|
||
|
|
def add_input_info(funcs_file, data_file, template_file,
|
||
|
|
c_file, snippets):
|
||
|
|
"""
|
||
|
|
Add generator input info in snippets.
|
||
|
|
|
||
|
|
:param funcs_file: Functions file object
|
||
|
|
:param data_file: Data file object
|
||
|
|
:param template_file: Template file object
|
||
|
|
:param c_file: Output C file object
|
||
|
|
:param snippets: Dictionary to contain code pieces to be
|
||
|
|
substituted in the template.
|
||
|
|
:return:
|
||
|
|
"""
|
||
|
|
snippets['test_file'] = c_file
|
||
|
|
snippets['test_main_file'] = template_file
|
||
|
|
snippets['test_case_file'] = funcs_file
|
||
|
|
snippets['test_case_data_file'] = data_file
|
||
|
|
|
||
|
|
|
||
|
|
def read_code_from_input_files(platform_file, helpers_file,
|
||
|
|
out_data_file, snippets):
|
||
|
|
"""
|
||
|
|
Read code from input files and create substitutions for replacement
|
||
|
|
strings in the template file.
|
||
|
|
|
||
|
|
:param platform_file: Platform file object
|
||
|
|
:param helpers_file: Helper functions file object
|
||
|
|
:param out_data_file: Output intermediate data file object
|
||
|
|
:param snippets: Dictionary to contain code pieces to be
|
||
|
|
substituted in the template.
|
||
|
|
:return:
|
||
|
|
"""
|
||
|
|
# Read helpers
|
||
|
|
with open(helpers_file, 'r') as help_f, open(platform_file, 'r') as \
|
||
|
|
platform_f:
|
||
|
|
snippets['test_common_helper_file'] = helpers_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 '\'
|
||
|
|
|
||
|
|
|
||
|
|
def write_test_source_file(template_file, c_file, snippets):
|
||
|
|
"""
|
||
|
|
Write output source file with generated source code.
|
||
|
|
|
||
|
|
:param template_file: Template file name
|
||
|
|
:param c_file: Output source file
|
||
|
|
:param snippets: Generated and code snippets
|
||
|
|
:return:
|
||
|
|
"""
|
||
|
|
with open(template_file, 'r') as template_f, open(c_file, 'w') as c_f:
|
||
|
|
for line_no, line in enumerate(template_f.readlines(), 1):
|
||
|
|
# Update line number. +1 as #line directive sets next line number
|
||
|
|
snippets['line_no'] = line_no + 1
|
||
|
|
code = string.Template(line).substitute(**snippets)
|
||
|
|
c_f.write(code)
|
||
|
|
|
||
|
|
|
||
|
|
def parse_function_file(funcs_file, snippets):
|
||
|
|
"""
|
||
|
|
Parse function file and generate function dispatch code.
|
||
|
|
|
||
|
|
:param funcs_file: Functions file name
|
||
|
|
:param snippets: Dictionary to contain code pieces to be
|
||
|
|
substituted in the template.
|
||
|
|
:return:
|
||
|
|
"""
|
||
|
|
with FileWrapper(funcs_file) as funcs_f:
|
||
|
|
suite_dependencies, dispatch_code, func_code, func_info = \
|
||
|
|
parse_functions(funcs_f)
|
||
|
|
snippets['functions_code'] = func_code
|
||
|
|
snippets['dispatch_code'] = dispatch_code
|
||
|
|
return suite_dependencies, func_info
|
||
|
|
|
||
|
|
|
||
|
|
def generate_intermediate_data_file(data_file, out_data_file,
|
||
|
|
suite_dependencies, func_info, snippets):
|
||
|
|
"""
|
||
|
|
Generates intermediate data file from input data file and
|
||
|
|
information read from functions file.
|
||
|
|
|
||
|
|
:param data_file: Data file name
|
||
|
|
:param out_data_file: Output/Intermediate data file
|
||
|
|
:param suite_dependencies: List of suite dependencies.
|
||
|
|
:param func_info: Function info parsed from functions file.
|
||
|
|
:param snippets: Dictionary to contain code pieces to be
|
||
|
|
substituted in the template.
|
||
|
|
:return:
|
||
|
|
"""
|
||
|
|
with FileWrapper(data_file) as data_f, \
|
||
|
|
open(out_data_file, 'w') as out_data_f:
|
||
|
|
dep_check_code, expression_code = gen_from_test_data(
|
||
|
|
data_f, out_data_f, func_info, suite_dependencies)
|
||
|
|
snippets['dep_check_code'] = dep_check_code
|
||
|
|
snippets['expression_code'] = expression_code
|
||
|
|
|
||
|
|
|
||
|
|
def generate_code(**input_info):
|
||
|
|
"""
|
||
|
|
Generates C source code from test suite file, data file, common
|
||
|
|
helpers file and platform file.
|
||
|
|
|
||
|
|
input_info expands to following parameters:
|
||
|
|
funcs_file: Functions file object
|
||
|
|
data_file: Data file object
|
||
|
|
template_file: Template file object
|
||
|
|
platform_file: Platform file object
|
||
|
|
helpers_file: Helper functions file object
|
||
|
|
suites_dir: Test suites dir
|
||
|
|
c_file: Output C file object
|
||
|
|
out_data_file: Output intermediate data file object
|
||
|
|
:return:
|
||
|
|
"""
|
||
|
|
funcs_file = input_info['funcs_file']
|
||
|
|
data_file = input_info['data_file']
|
||
|
|
template_file = input_info['template_file']
|
||
|
|
platform_file = input_info['platform_file']
|
||
|
|
helpers_file = input_info['helpers_file']
|
||
|
|
suites_dir = input_info['suites_dir']
|
||
|
|
c_file = input_info['c_file']
|
||
|
|
out_data_file = input_info['out_data_file']
|
||
|
|
for name, path in [('Functions file', funcs_file),
|
||
|
|
('Data file', data_file),
|
||
|
|
('Template file', template_file),
|
||
|
|
('Platform file', platform_file),
|
||
|
|
('Helpers code file', helpers_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_code_from_input_files(platform_file, helpers_file,
|
||
|
|
out_data_file, snippets)
|
||
|
|
add_input_info(funcs_file, data_file, template_file,
|
||
|
|
c_file, snippets)
|
||
|
|
suite_dependencies, func_info = parse_function_file(funcs_file, snippets)
|
||
|
|
generate_intermediate_data_file(data_file, out_data_file,
|
||
|
|
suite_dependencies, func_info, snippets)
|
||
|
|
write_test_source_file(template_file, c_file, snippets)
|
||
|
|
|
||
|
|
|
||
|
|
def main():
|
||
|
|
"""
|
||
|
|
Command line parser.
|
||
|
|
|
||
|
|
:return:
|
||
|
|
"""
|
||
|
|
parser = argparse.ArgumentParser(
|
||
|
|
description='Dynamically generate test suite code.')
|
||
|
|
|
||
|
|
parser.add_argument("-f", "--functions-file",
|
||
|
|
dest="funcs_file",
|
||
|
|
help="Functions file",
|
||
|
|
metavar="FUNCTIONS_FILE",
|
||
|
|
required=True)
|
||
|
|
|
||
|
|
parser.add_argument("-d", "--data-file",
|
||
|
|
dest="data_file",
|
||
|
|
help="Data file",
|
||
|
|
metavar="DATA_FILE",
|
||
|
|
required=True)
|
||
|
|
|
||
|
|
parser.add_argument("-t", "--template-file",
|
||
|
|
dest="template_file",
|
||
|
|
help="Template file",
|
||
|
|
metavar="TEMPLATE_FILE",
|
||
|
|
required=True)
|
||
|
|
|
||
|
|
parser.add_argument("-s", "--suites-dir",
|
||
|
|
dest="suites_dir",
|
||
|
|
help="Suites dir",
|
||
|
|
metavar="SUITES_DIR",
|
||
|
|
required=True)
|
||
|
|
|
||
|
|
parser.add_argument("--helpers-file",
|
||
|
|
dest="helpers_file",
|
||
|
|
help="Helpers file",
|
||
|
|
metavar="HELPERS_FILE",
|
||
|
|
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_name + '.datax')
|
||
|
|
|
||
|
|
out_c_file_dir = os.path.dirname(out_c_file)
|
||
|
|
out_data_file_dir = os.path.dirname(out_data_file)
|
||
|
|
for directory in [out_c_file_dir, out_data_file_dir]:
|
||
|
|
if not os.path.exists(directory):
|
||
|
|
os.makedirs(directory)
|
||
|
|
|
||
|
|
generate_code(funcs_file=args.funcs_file, data_file=args.data_file,
|
||
|
|
template_file=args.template_file,
|
||
|
|
platform_file=args.platform_file,
|
||
|
|
helpers_file=args.helpers_file, suites_dir=args.suites_dir,
|
||
|
|
c_file=out_c_file, out_data_file=out_data_file)
|
||
|
|
|
||
|
|
|
||
|
|
if __name__ == "__main__":
|
||
|
|
try:
|
||
|
|
main()
|
||
|
|
except GeneratorInputError as err:
|
||
|
|
sys.exit("%s: input error: %s" %
|
||
|
|
(os.path.basename(sys.argv[0]), str(err)))
|