mirror of
https://github.com/KhronosGroup/SPIRV-Tools
synced 2024-12-26 01:31:06 +00:00
e992c96c89
- Ignore symbols marked as .hidden - Ignore weakly linked thunks (_ZT prefix) Without this, the exports check fails on the Android NDK build.
120 lines
4.4 KiB
Python
Executable File
120 lines
4.4 KiB
Python
Executable File
#!/usr/bin/env python
|
|
# Copyright (c) 2017 Google Inc.
|
|
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
"""Ensures that all externally visible functions in the library have an appropriate name
|
|
|
|
Appropriate function names are:
|
|
- names starting with spv,
|
|
- anything in a namespace,
|
|
- functions added by the protobuf compiler,
|
|
- and weak definitions of new and delete."""
|
|
|
|
import os.path
|
|
import re
|
|
import subprocess
|
|
import sys
|
|
|
|
|
|
PROG = 'check_symbol_exports'
|
|
|
|
|
|
def command_output(cmd, directory):
|
|
"""Runs a command in a directory and returns its standard output stream.
|
|
|
|
Captures the standard error stream.
|
|
|
|
Raises a RuntimeError if the command fails to launch or otherwise fails.
|
|
"""
|
|
p = subprocess.Popen(cmd,
|
|
cwd=directory,
|
|
stdout=subprocess.PIPE,
|
|
stderr=subprocess.PIPE,
|
|
universal_newlines=True)
|
|
(stdout, _) = p.communicate()
|
|
if p.returncode != 0:
|
|
raise RuntimeError('Failed to run %s in %s' % (cmd, directory))
|
|
return stdout
|
|
|
|
|
|
def check_library(library):
|
|
"""Scans the given library file for global exports. If all such
|
|
exports are namespaced or begin with spv (in either C or C++ styles)
|
|
then return 0. Otherwise emit a message and return 1."""
|
|
|
|
# The pattern for an externally visible symbol record
|
|
symbol_pattern = re.compile(r'^[0-aA-Fa-f]+ +([wg]) *F \.text.*[0-9A-Fa-f]+ +(.*)')
|
|
|
|
# Ok patterns are as follows, assuming Itanium name mangling:
|
|
# spv[A-Z] : extern "C" symbol starting with spv
|
|
# _ZN : something in a namespace
|
|
# _ZSt : something in the standard namespace
|
|
# _ZZN : something in a local scope and namespace
|
|
# _Z[0-9]+spv[A-Z_] : C++ symbol starting with spv[A-Z_]
|
|
symbol_ok_pattern = re.compile(r'^(spv[A-Z]|_ZN|_ZSt|_ZZN|_Z[0-9]+spv[A-Z_])')
|
|
|
|
# In addition, the following pattern allowlists global functions that are added
|
|
# by the protobuf compiler:
|
|
# - AddDescriptors_spvtoolsfuzz_2eproto()
|
|
# - InitDefaults_spvtoolsfuzz_2eproto()
|
|
symbol_allowlist_pattern = re.compile(r'_Z[0-9]+(InitDefaults|AddDescriptors)_spvtoolsfuzz_2eprotov')
|
|
|
|
symbol_is_new_or_delete = re.compile(r'^(_Zna|_Znw|_Zdl|_Zda)')
|
|
# Compilaion for Arm has various thunks for constructors, destructors, vtables.
|
|
# They are weak.
|
|
symbol_is_thunk = re.compile(r'^_ZT')
|
|
|
|
# This occurs in NDK builds.
|
|
symbol_is_hidden = re.compile(r'^\.hidden ')
|
|
|
|
seen = set()
|
|
result = 0
|
|
for line in command_output(['objdump', '-t', library], '.').split('\n'):
|
|
match = symbol_pattern.search(line)
|
|
if match:
|
|
linkage = match.group(1)
|
|
symbol = match.group(2)
|
|
if symbol not in seen:
|
|
seen.add(symbol)
|
|
#print("look at '{}'".format(symbol))
|
|
if not (symbol_is_new_or_delete.match(symbol) and linkage == 'w'):
|
|
if not (symbol_is_thunk.match(symbol) and linkage == 'w'):
|
|
if not (symbol_allowlist_pattern.match(symbol) or
|
|
symbol_ok_pattern.match(symbol) or
|
|
symbol_is_hidden.match(symbol)):
|
|
print('{}: error: Unescaped exported symbol: {}'.format(PROG, symbol))
|
|
result = 1
|
|
return result
|
|
|
|
|
|
def main():
|
|
import argparse
|
|
parser = argparse.ArgumentParser(description='Check global names exported from a library')
|
|
parser.add_argument('library', help='The static library to examine')
|
|
args = parser.parse_args()
|
|
|
|
if not os.path.isfile(args.library):
|
|
print('{}: error: {} does not exist'.format(PROG, args.library))
|
|
sys.exit(1)
|
|
|
|
if os.name == 'posix':
|
|
status = check_library(args.library)
|
|
sys.exit(status)
|
|
else:
|
|
print('Passing test since not on Posix')
|
|
sys.exit(0)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
main()
|