mirror of
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baa089903e
Depends on D36091 Differential Revision: https://phabricator.services.mozilla.com/D36092 --HG-- extra : moz-landing-system : lando
344 lines
12 KiB
Python
344 lines
12 KiB
Python
# vim: set ts=8 sts=4 et sw=4 tw=99:
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# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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# ----------------------------------------------------------------------------
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# This script checks that SpiderMonkey MacroAssembler methods are properly
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# annotated.
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#
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# The MacroAssembler has one interface for all platforms, but it might have one
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# definition per platform. The code of the MacroAssembler use a macro to
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# annotate the method declarations, in order to delete the function if it is not
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# present on the current platform, and also to locate the files in which the
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# methods are defined.
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#
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# This script scans the MacroAssembler.h header, for method declarations.
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# It also scans MacroAssembler-/arch/.cpp, MacroAssembler-/arch/-inl.h, and
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# MacroAssembler-inl.h for method definitions. The result of both scans are
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# uniformized, and compared, to determine if the MacroAssembler.h header as
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# proper methods annotations.
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# ----------------------------------------------------------------------------
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from __future__ import absolute_import
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from __future__ import print_function
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import difflib
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import os
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import re
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import sys
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architecture_independent = set(['generic'])
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all_unsupported_architectures_names = set(['mips32', 'mips64', 'mips_shared'])
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all_architecture_names = set(['x86', 'x64', 'arm', 'arm64'])
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all_shared_architecture_names = set(['x86_shared', 'arm', 'arm64'])
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reBeforeArg = "(?<=[(,\s])"
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reArgType = "(?P<type>[\w\s:*&]+)"
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reArgName = "(?P<name>\s\w+)"
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reArgDefault = "(?P<default>(?:\s=[^,)]+)?)"
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reAfterArg = "(?=[,)])"
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reMatchArg = re.compile(reBeforeArg + reArgType +
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reArgName + reArgDefault + reAfterArg)
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def get_normalized_signatures(signature, fileAnnot=None):
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# Remove static
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signature = signature.replace('static', '')
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# Remove semicolon.
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signature = signature.replace(';', ' ')
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# Normalize spaces.
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signature = re.sub(r'\s+', ' ', signature).strip()
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# Remove new-line induced spaces after opening braces.
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signature = re.sub(r'\(\s+', '(', signature).strip()
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# Match arguments, and keep only the type.
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signature = reMatchArg.sub('\g<type>', signature)
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# Remove class name
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signature = signature.replace('MacroAssembler::', '')
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# Extract list of architectures
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archs = ['generic']
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if fileAnnot:
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archs = [fileAnnot['arch']]
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if 'DEFINED_ON(' in signature:
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archs = re.sub(
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r'.*DEFINED_ON\((?P<archs>[^()]*)\).*', '\g<archs>', signature).split(',')
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archs = [a.strip() for a in archs]
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signature = re.sub(r'\s+DEFINED_ON\([^()]*\)', '', signature)
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elif 'PER_ARCH' in signature:
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archs = all_architecture_names
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signature = re.sub(r'\s+PER_ARCH', '', signature)
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elif 'PER_SHARED_ARCH' in signature:
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archs = all_shared_architecture_names
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signature = re.sub(r'\s+PER_SHARED_ARCH', '', signature)
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elif 'OOL_IN_HEADER' in signature:
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assert archs == ['generic']
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signature = re.sub(r'\s+OOL_IN_HEADER', '', signature)
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else:
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# No signature annotation, the list of architectures remains unchanged.
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pass
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# Extract inline annotation
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inline = False
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if fileAnnot:
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inline = fileAnnot['inline']
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if 'inline ' in signature:
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signature = re.sub(r'inline\s+', '', signature)
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inline = True
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inlinePrefx = ''
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if inline:
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inlinePrefx = 'inline '
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signatures = [
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{'arch': a, 'sig': inlinePrefx + signature}
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for a in archs
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]
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return signatures
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file_suffixes = set([
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a.replace('_', '-') for a in
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all_architecture_names.union(all_shared_architecture_names)
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.union(all_unsupported_architectures_names)
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])
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def get_file_annotation(filename):
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origFilename = filename
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filename = filename.split('/')[-1]
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inline = False
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if filename.endswith('.cpp'):
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filename = filename[:-len('.cpp')]
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elif filename.endswith('-inl.h'):
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inline = True
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filename = filename[:-len('-inl.h')]
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elif filename.endswith('.h'):
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# This allows the definitions block in MacroAssembler.h to be
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# style-checked.
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inline = True
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filename = filename[:-len('.h')]
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else:
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raise Exception('unknown file name', origFilename)
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arch = 'generic'
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for suffix in file_suffixes:
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if filename == 'MacroAssembler-' + suffix:
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arch = suffix
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break
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return {
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'inline': inline,
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'arch': arch.replace('-', '_')
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}
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def get_macroassembler_definitions(filename):
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try:
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fileAnnot = get_file_annotation(filename)
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except Exception:
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return []
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style_section = False
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lines = ''
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signatures = []
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with open(filename) as f:
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for line in f:
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if '//{{{ check_macroassembler_style' in line:
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if style_section:
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raise 'check_macroassembler_style section already opened.'
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style_section = True
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braces_depth = 0
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elif '//}}} check_macroassembler_style' in line:
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style_section = False
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if not style_section:
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continue
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# Ignore preprocessor directives.
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if line.startswith('#'):
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continue
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# Remove comments from the processed line.
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line = re.sub(r'//.*', '', line)
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# Locate and count curly braces.
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open_curly_brace = line.find('{')
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was_braces_depth = braces_depth
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braces_depth = braces_depth + line.count('{') - line.count('}')
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# Raise an error if the check_macroassembler_style macro is used
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# across namespaces / classes scopes.
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if braces_depth < 0:
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raise 'check_macroassembler_style annotations are not well scoped.'
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# If the current line contains an opening curly brace, check if
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# this line combines with the previous one can be identified as a
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# MacroAssembler function signature.
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if open_curly_brace != -1 and was_braces_depth == 0:
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lines = lines + line[:open_curly_brace]
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if 'MacroAssembler::' in lines:
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signatures.extend(
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get_normalized_signatures(lines, fileAnnot))
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lines = ''
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continue
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# We do not aggregate any lines if we are scanning lines which are
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# in-between a set of curly braces.
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if braces_depth > 0:
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continue
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if was_braces_depth != 0:
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line = line[line.rfind('}') + 1:]
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# This logic is used to remove template instantiation, static
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# variable definitions and function declaration from the next
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# function definition.
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last_semi_colon = line.rfind(';')
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if last_semi_colon != -1:
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lines = ''
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line = line[last_semi_colon + 1:]
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# Aggregate lines of non-braced text, which corresponds to the space
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# where we are expecting to find function definitions.
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lines = lines + line
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return signatures
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def get_macroassembler_declaration(filename):
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style_section = False
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lines = ''
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signatures = []
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with open(filename) as f:
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for line in f:
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if '//{{{ check_macroassembler_decl_style' in line:
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style_section = True
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elif '//}}} check_macroassembler_decl_style' in line:
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style_section = False
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if not style_section:
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continue
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# Ignore preprocessor directives.
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if line.startswith('#'):
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continue
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line = re.sub(r'//.*', '', line)
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if len(line.strip()) == 0 or 'public:' in line or 'private:' in line:
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lines = ''
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continue
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lines = lines + line
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# Continue until we have a complete declaration
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if ';' not in lines:
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continue
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# Skip member declarations: which are lines ending with a
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# semi-colon without any list of arguments.
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if ')' not in lines:
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lines = ''
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continue
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signatures.extend(get_normalized_signatures(lines))
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lines = ''
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return signatures
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def append_signatures(d, sigs):
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for s in sigs:
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if s['sig'] not in d:
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d[s['sig']] = []
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d[s['sig']].append(s['arch'])
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return d
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def generate_file_content(signatures):
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output = []
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for s in sorted(signatures.keys()):
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archs = set(sorted(signatures[s]))
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archs -= all_unsupported_architectures_names
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if len(archs.symmetric_difference(architecture_independent)) == 0:
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output.append(s + ';\n')
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if s.startswith('inline'):
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# TODO, bug 1432600: This is mistaken for OOL_IN_HEADER
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# functions. (Such annotation is already removed by the time
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# this function sees the signature here.)
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output.append(' is defined in MacroAssembler-inl.h\n')
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else:
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output.append(' is defined in MacroAssembler.cpp\n')
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else:
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if len(archs.symmetric_difference(all_architecture_names)) == 0:
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output.append(s + ' PER_ARCH;\n')
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elif len(archs.symmetric_difference(all_shared_architecture_names)) == 0:
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output.append(s + ' PER_SHARED_ARCH;\n')
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else:
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output.append(
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s + ' DEFINED_ON(' + ', '.join(sorted(archs)) + ');\n')
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for a in sorted(archs):
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a = a.replace('_', '-')
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masm = '%s/MacroAssembler-%s' % (a, a)
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if s.startswith('inline'):
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output.append(' is defined in %s-inl.h\n' % masm)
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else:
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output.append(' is defined in %s.cpp\n' % masm)
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return output
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def check_style():
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# We read from the header file the signature of each function.
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decls = dict() # type: dict(signature => ['x86', 'x64'])
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# We infer from each file the signature of each MacroAssembler function.
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defs = dict() # type: dict(signature => ['x86', 'x64'])
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root_dir = os.path.join('js', 'src', 'jit')
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for dirpath, dirnames, filenames in os.walk(root_dir):
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for filename in filenames:
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if 'MacroAssembler' not in filename:
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continue
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filepath = os.path.join(dirpath, filename).replace('\\', '/')
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if filepath.endswith('MacroAssembler.h'):
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decls = append_signatures(
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decls, get_macroassembler_declaration(filepath))
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defs = append_signatures(
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defs, get_macroassembler_definitions(filepath))
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if not decls or not defs:
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raise Exception("Did not find any definitions or declarations")
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# Compare declarations and definitions output.
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difflines = difflib.unified_diff(generate_file_content(decls),
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generate_file_content(defs),
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fromfile='check_macroassembler_style.py declared syntax',
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tofile='check_macroassembler_style.py found definitions')
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ok = True
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for diffline in difflines:
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ok = False
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print(diffline, end='')
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return ok
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def main():
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ok = check_style()
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if ok:
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print('TEST-PASS | check_macroassembler_style.py | ok')
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else:
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print('TEST-UNEXPECTED-FAIL | check_macroassembler_style.py | actual output does not match expected output; diff is above') # noqa: E501
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sys.exit(0 if ok else 1)
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if __name__ == '__main__':
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main()
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