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gecko-dev/config/check_macroassembler_style.py

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# vim: set ts=8 sts=4 et sw=4 tw=99:
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
#----------------------------------------------------------------------------
# This script checks that SpiderMonkey MacroAssembler methods are properly
# annotated.
#
# The MacroAssembler has one interface for all platforms, but it might have one
# definition per platform. The code of the MacroAssembler use a macro to
# annotate the method declarations, in order to delete the function if it is not
# present on the current platform, and also to locate the files in which the
# methods are defined.
#
# This script scans the MacroAssembler.h header, for method declarations.
# It also scans MacroAssembler-/arch/.cpp, MacroAssembler-/arch/-inl.h, and
# MacroAssembler-inl.h for method definitions. The result of both scans are
# uniformized, and compared, to determine if the MacroAssembler.h header as
# proper methods annotations.
#----------------------------------------------------------------------------
from __future__ import print_function
import difflib
import os
import re
import subprocess
import sys
from check_utils import get_all_toplevel_filenames
architecture_independent = set([ 'generic' ])
all_architecture_names = set([ 'x86', 'x64', 'arm', 'arm64', 'mips32' ])
all_shared_architecture_names = set([ 'x86_shared', 'arm', 'arm64', 'mips32' ])
reBeforeArg = "(?<=[(,\s])"
reArgType = "(?P<type>[\w\s:*&]+)"
reArgName = "(?P<name>\s\w+)"
reArgDefault = "(?P<default>(?:\s=[^,)]+)?)"
reAfterArg = "(?=[,)])"
reMatchArg = re.compile(reBeforeArg + reArgType + reArgName + reArgDefault + reAfterArg)
def get_normalized_signatures(signature, fileAnnot = None):
# Remove semicolon.
signature = signature.replace(';', ' ')
# Normalize spaces.
signature = re.sub(r'\s+', ' ', signature).strip()
# Match arguments, and keep only the type.
signature = reMatchArg.sub('\g<type>', signature)
# Remove class name
signature = signature.replace('MacroAssembler::', '')
# Extract list of architectures
archs = ['generic']
if fileAnnot:
archs = [fileAnnot['arch']]
if 'DEFINED_ON(' in signature:
archs = re.sub(r'.*DEFINED_ON\((?P<archs>[^()]*)\).*', '\g<archs>', signature).split(',')
archs = [a.strip() for a in archs]
signature = re.sub(r'\s+DEFINED_ON\([^()]*\)', '', signature)
elif 'PER_ARCH' in signature:
archs = all_architecture_names
signature = re.sub(r'\s+PER_ARCH', '', signature)
elif 'PER_SHARED_ARCH' in signature:
archs = all_shared_architecture_names
signature = re.sub(r'\s+PER_SHARED_ARCH', '', signature)
else:
# No signature annotation, the list of architectures remains unchanged.
pass
# Extract inline annotation
inline = False
if fileAnnot:
inline = fileAnnot['inline']
if 'inline ' in signature:
signature = re.sub(r'inline\s+', '', signature)
inline = True
inlinePrefx = ''
if inline:
inlinePrefx = 'inline '
signatures = [
{ 'arch': a, 'sig': inlinePrefx + signature }
for a in archs
]
return signatures
file_suffixes = set([
a.replace('_', '-') for a in
all_architecture_names.union(all_shared_architecture_names)
])
def get_file_annotation(filename):
origFilename = filename
filename = filename.split('/')[-1]
inline = False
if filename.endswith('.cpp'):
filename = filename[:-len('.cpp')]
elif filename.endswith('-inl.h'):
inline = True
filename = filename[:-len('-inl.h')]
else:
raise Exception('unknown file name', origFilename)
arch = 'generic'
for suffix in file_suffixes:
if filename == 'MacroAssembler-' + suffix:
arch = suffix
break
return {
'inline': inline,
'arch': arch.replace('-', '_')
}
def get_macroassembler_definitions(filename):
try:
fileAnnot = get_file_annotation(filename)
except:
return []
style_section = False
code_section = False
lines = ''
signatures = []
with open(os.path.join('../..', filename)) as f:
for line in f:
if '//{{{ check_macroassembler_style' in line:
style_section = True
elif '//}}} check_macroassembler_style' in line:
style_section = False
if not style_section:
continue
line = re.sub(r'//.*', '', line)
if line.startswith('{'):
if 'MacroAssembler::' in lines:
signatures.extend(get_normalized_signatures(lines, fileAnnot))
code_section = True
continue
if line.startswith('}'):
code_section = False
lines = ''
continue
if code_section:
continue
if len(line.strip()) == 0:
lines = ''
continue
lines = lines + line
# Continue until we have a complete declaration
if '{' not in lines:
continue
# Skip variable declarations
if ')' not in lines:
lines = ''
continue
return signatures
def get_macroassembler_declaration(filename):
style_section = False
lines = ''
signatures = []
with open(os.path.join('../..', filename)) as f:
for line in f:
if '//{{{ check_macroassembler_style' in line:
style_section = True
elif '//}}} check_macroassembler_style' in line:
style_section = False
if not style_section:
continue
line = re.sub(r'//.*', '', line)
if len(line.strip()) == 0:
lines = ''
continue
lines = lines + line
# Continue until we have a complete declaration
if ';' not in lines:
continue
# Skip variable declarations
if ')' not in lines:
lines = ''
continue
signatures.extend(get_normalized_signatures(lines))
lines = ''
return signatures
def append_signatures(d, sigs):
for s in sigs:
if s['sig'] not in d:
d[s['sig']] = []
d[s['sig']].append(s['arch']);
return d
def generate_file_content(signatures):
output = []
for s in sorted(signatures.keys()):
archs = set(sorted(signatures[s]))
if len(archs.symmetric_difference(architecture_independent)) == 0:
output.append(s + ';\n')
if s.startswith('inline'):
output.append(' is defined in MacroAssembler-inl.h\n')
else:
output.append(' is defined in MacroAssembler.cpp\n')
else:
if len(archs.symmetric_difference(all_architecture_names)) == 0:
output.append(s + ' PER_ARCH;\n')
elif len(archs.symmetric_difference(all_shared_architecture_names)) == 0:
output.append(s + ' PER_SHARED_ARCH;\n')
else:
output.append(s + ' DEFINED_ON(' + ', '.join(archs) + ');\n')
for a in archs:
a = a.replace('_', '-')
masm = '%s/MacroAssembler-%s' % (a, a)
if s.startswith('inline'):
output.append(' is defined in %s-inl.h\n' % masm)
else:
output.append(' is defined in %s.cpp\n' % masm)
return output
def check_style():
# We read from the header file the signature of each function.
decls = dict() # type: dict(signature => ['x86', 'x64'])
# We infer from each file the signature of each MacroAssembler function.
defs = dict() # type: dict(signature => ['x86', 'x64'])
# Select the appropriate files.
for filename in get_all_toplevel_filenames():
if not filename.startswith('js/src/jit/'):
continue
if 'MacroAssembler' not in filename:
continue
if filename.endswith('MacroAssembler.h'):
decls = append_signatures(decls, get_macroassembler_declaration(filename))
else:
defs = append_signatures(defs, get_macroassembler_definitions(filename))
# Compare declarations and definitions output.
difflines = difflib.unified_diff(generate_file_content(decls),
generate_file_content(defs),
fromfile='check_macroassembler_style.py declared syntax',
tofile='check_macroassembler_style.py found definitions')
ok = True
for diffline in difflines:
ok = False
print(diffline, end='')
return ok
def main():
ok = check_style()
if ok:
print('TEST-PASS | check_macroassembler_style.py | ok')
else:
print('TEST-UNEXPECTED-FAIL | check_macroassembler_style.py | actual output does not match expected output; diff is above')
sys.exit(0 if ok else 1)
if __name__ == '__main__':
main()
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