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# Copyright 2015 The Shaderc Authors. All rights reserved.
#
# 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.
"""A number of common glslc result checks coded in mixin classes.
A test case can use these checks by declaring their enclosing mixin classes
as superclass and providing the expected_* variables required by the check_*()
methods in the mixin classes.
"""
import difflib
import os
import re
import subprocess
from glslc_test_framework import GlslCTest
def convert_to_unix_line_endings(source):
"""Converts all line endings in source to be unix line endings."""
return source.replace('\r\n', '\n').replace('\r', '\n')
def substitute_file_extension(filename, extension):
"""Substitutes file extension, respecting known shader extensions.
foo.vert -> foo.vert.[extension] [similarly for .frag, .comp, etc.]
foo.glsl -> foo.[extension]
foo.unknown -> foo.[extension]
foo -> foo.[extension]
"""
if filename[-5:] not in ['.vert', '.frag', '.tesc', '.tese',
'.geom', '.comp', '.spvasm']:
return filename.rsplit('.', 1)[0] + '.' + extension
else:
return filename + '.' + extension
def get_object_filename(source_filename):
"""Gets the object filename for the given source file."""
return substitute_file_extension(source_filename, 'spv')
def get_assembly_filename(source_filename):
"""Gets the assembly filename for the given source file."""
return substitute_file_extension(source_filename, 'spvasm')
def verify_file_non_empty(filename):
"""Checks that a given file exists and is not empty."""
if not os.path.isfile(filename):
return False, 'Cannot find file: ' + filename
if not os.path.getsize(filename):
return False, 'Empty file: ' + filename
return True, ''
class ReturnCodeIsZero(GlslCTest):
"""Mixin class for checking that the return code is zero."""
def check_return_code_is_zero(self, status):
if status.returncode:
return False, 'Non-zero return code: {ret}\n'.format(
ret=status.returncode)
return True, ''
class NoOutputOnStdout(GlslCTest):
"""Mixin class for checking that there is no output on stdout."""
def check_no_output_on_stdout(self, status):
if status.stdout:
return False, 'Non empty stdout: {out}\n'.format(out=status.stdout)
return True, ''
class NoOutputOnStderr(GlslCTest):
"""Mixin class for checking that there is no output on stderr."""
def check_no_output_on_stderr(self, status):
if status.stderr:
return False, 'Non empty stderr: {err}\n'.format(err=status.stderr)
return True, ''
class SuccessfulReturn(ReturnCodeIsZero, NoOutputOnStdout, NoOutputOnStderr):
"""Mixin class for checking that return code is zero and no output on
stdout and stderr."""
pass
class NoGeneratedFiles(GlslCTest):
"""Mixin class for checking that there is no file generated."""
def check_no_generated_files(self, status):
all_files = os.listdir(status.directory)
input_files = status.input_filenames
if all([f.startswith(status.directory) for f in input_files]):
all_files = [os.path.join(status.directory, f) for f in all_files]
generated_files = set(all_files) - set(input_files)
if len(generated_files) == 0:
return True, ''
else:
return False, 'Extra files generated: {}'.format(generated_files)
class CorrectBinaryLengthAndPreamble(GlslCTest):
"""Provides methods for verifying preamble for a SPIR-V binary."""
def verify_binary_length_and_header(self, binary, spv_version = 0x10000):
"""Checks that the given SPIR-V binary has valid length and header.
Returns:
False, error string if anything is invalid
True, '' otherwise
Args:
binary: a bytes object containing the SPIR-V binary
spv_version: target SPIR-V version number, with same encoding
as the version word in a SPIR-V header.
"""
def read_word(binary, index, little_endian):
"""Reads the index-th word from the given binary file."""
word = binary[index * 4:(index + 1) * 4]
if little_endian:
word = reversed(word)
return reduce(lambda w, b: (w << 8) | ord(b), word, 0)
def check_endianness(binary):
"""Checks the endianness of the given SPIR-V binary.
Returns:
True if it's little endian, False if it's big endian.
None if magic number is wrong.
"""
first_word = read_word(binary, 0, True)
if first_word == 0x07230203:
return True
first_word = read_word(binary, 0, False)
if first_word == 0x07230203:
return False
return None
num_bytes = len(binary)
if num_bytes % 4 != 0:
return False, ('Incorrect SPV binary: size should be a multiple'
' of words')
if num_bytes < 20:
return False, 'Incorrect SPV binary: size less than 5 words'
preamble = binary[0:19]
little_endian = check_endianness(preamble)
# SPIR-V module magic number
if little_endian is None:
return False, 'Incorrect SPV binary: wrong magic number'
# SPIR-V version number
version = read_word(preamble, 1, little_endian)
# TODO(dneto): Recent Glslang uses version word 0 for opengl_compat
# profile
if version != spv_version and version != 0:
return False, 'Incorrect SPV binary: wrong version number'
# Shaderc-over-Glslang (0x000d....) or
# SPIRV-Tools (0x0007....) generator number
if read_word(preamble, 2, little_endian) != 0x000d0006 and \
read_word(preamble, 2, little_endian) != 0x00070000:
return False, ('Incorrect SPV binary: wrong generator magic '
'number')
# reserved for instruction schema
if read_word(preamble, 4, little_endian) != 0:
return False, 'Incorrect SPV binary: the 5th byte should be 0'
return True, ''
class CorrectObjectFilePreamble(CorrectBinaryLengthAndPreamble):
"""Provides methods for verifying preamble for a SPV object file."""
def verify_object_file_preamble(self, filename, spv_version = 0x10000):
"""Checks that the given SPIR-V binary file has correct preamble."""
success, message = verify_file_non_empty(filename)
if not success:
return False, message
with open(filename, 'rb') as object_file:
object_file.seek(0, os.SEEK_END)
num_bytes = object_file.tell()
object_file.seek(0)
binary = bytes(object_file.read())
return self.verify_binary_length_and_header(binary, spv_version)
return True, ''
class CorrectAssemblyFilePreamble(GlslCTest):
"""Provides methods for verifying preamble for a SPV assembly file."""
def verify_assembly_file_preamble(self, filename):
success, message = verify_file_non_empty(filename)
if not success:
return False, message
with open(filename) as assembly_file:
line1 = assembly_file.readline()
line2 = assembly_file.readline()
line3 = assembly_file.readline()
if (line1 != '; SPIR-V\n' or
line2 != '; Version: 1.0\n' or
(not line3.startswith('; Generator: Google Shaderc over Glslang;'))):
return False, 'Incorrect SPV assembly'
return True, ''
class ValidObjectFile(SuccessfulReturn, CorrectObjectFilePreamble):
"""Mixin class for checking that every input file generates a valid SPIR-V 1.0
object file following the object file naming rule, and there is no output on
stdout/stderr."""
def check_object_file_preamble(self, status):
for input_filename in status.input_filenames:
object_filename = get_object_filename(input_filename)
success, message = self.verify_object_file_preamble(
os.path.join(status.directory, object_filename))
if not success:
return False, message
return True, ''
class ValidObjectFile1_3(SuccessfulReturn, CorrectObjectFilePreamble):
"""Mixin class for checking that every input file generates a valid SPIR-V 1.3
object file following the object file naming rule, and there is no output on
stdout/stderr."""
def check_object_file_preamble(self, status):
for input_filename in status.input_filenames:
object_filename = get_object_filename(input_filename)
success, message = self.verify_object_file_preamble(
os.path.join(status.directory, object_filename),
0x10300)
if not success:
return False, message
return True, ''
class ValidObjectFileWithAssemblySubstr(SuccessfulReturn, CorrectObjectFilePreamble):
"""Mixin class for checking that every input file generates a valid object
file following the object file naming rule, there is no output on
stdout/stderr, and the disassmbly contains a specified substring per input."""
def check_object_file_disassembly(self, status):
for an_input in status.inputs:
object_filename = get_object_filename(an_input.filename)
obj_file = str(os.path.join(status.directory, object_filename))
success, message = self.verify_object_file_preamble(obj_file)
if not success:
return False, message
cmd = [status.test_manager.disassembler_path, '--no-color', obj_file]
process = subprocess.Popen(
args=cmd, stdin=subprocess.PIPE, stdout=subprocess.PIPE,
stderr=subprocess.PIPE, cwd=status.directory)
output = process.communicate(None)
disassembly = output[0]
if not isinstance(an_input.assembly_substr, str):
return False, "Missing assembly_substr member"
if an_input.assembly_substr not in disassembly:
return False, ('Incorrect disassembly output:\n{asm}\n'
'Expected substring not found:\n{exp}'.format(
asm=disassembly, exp=an_input.assembly_substr))
return True, ''
class ValidNamedObjectFile(SuccessfulReturn, CorrectObjectFilePreamble):
"""Mixin class for checking that a list of object files with the given
names are correctly generated, and there is no output on stdout/stderr.
To mix in this class, subclasses need to provide expected_object_filenames
as the expected object filenames.
"""
def check_object_file_preamble(self, status):
for object_filename in self.expected_object_filenames:
success, message = self.verify_object_file_preamble(
os.path.join(status.directory, object_filename))
if not success:
return False, message
return True, ''
class ValidFileContents(GlslCTest):
"""Mixin class to test that a specific file contains specific text
To mix in this class, subclasses need to provide expected_file_contents as
the contents of the file and target_filename to determine the location."""
def check_file(self, status):
target_filename = os.path.join(status.directory, self.target_filename)
if not os.path.isfile(target_filename):
return False, 'Cannot find file: ' + target_filename
with open(target_filename, 'r') as target_file:
file_contents = target_file.read()
if isinstance(self.expected_file_contents, str):
if file_contents == self.expected_file_contents:
return True, ''
return False, ('Incorrect file output: \n{act}\n'
'Expected:\n{exp}'
'With diff:\n{diff}'.format(
act=file_contents,
exp=self.expected_file_contents,
diff='\n'.join(list(difflib.unified_diff(
self.expected_file_contents.split('\n'),
file_contents.split('\n'),
fromfile='expected_output',
tofile='actual_output')))))
elif isinstance(self.expected_file_contents, type(re.compile(''))):
if self.expected_file_contents.search(file_contents):
return True, ''
return False, (
'Incorrect file output: \n{act}\n'
'Expected matching regex pattern:\n{exp}'.format(
act=file_contents,
exp=self.expected_file_contents.pattern))
return False, ('Could not open target file ' + target_filename +
' for reading')
class ValidAssemblyFile(SuccessfulReturn, CorrectAssemblyFilePreamble):
"""Mixin class for checking that every input file generates a valid assembly
file following the assembly file naming rule, and there is no output on
stdout/stderr."""
def check_assembly_file_preamble(self, status):
for input_filename in status.input_filenames:
assembly_filename = get_assembly_filename(input_filename)
success, message = self.verify_assembly_file_preamble(
os.path.join(status.directory, assembly_filename))
if not success:
return False, message
return True, ''
class ValidAssemblyFileWithSubstr(ValidAssemblyFile):
"""Mixin class for checking that every input file generates a valid assembly
file following the assembly file naming rule, there is no output on
stdout/stderr, and all assembly files have the given substring specified
by expected_assembly_substr.
To mix in this class, subclasses need to provde expected_assembly_substr
as the expected substring.
"""
def check_assembly_with_substr(self, status):
for input_filename in status.input_filenames:
assembly_filename = get_assembly_filename(input_filename)
success, message = self.verify_assembly_file_preamble(
os.path.join(status.directory, assembly_filename))
if not success:
return False, message
with open(assembly_filename, 'r') as f:
content = f.read()
if self.expected_assembly_substr not in convert_to_unix_line_endings(content):
return False, ('Incorrect assembly output:\n{asm}\n'
'Expected substring not found:\n{exp}'.format(
asm=content, exp=self.expected_assembly_substr))
return True, ''
class ValidAssemblyFileWithoutSubstr(ValidAssemblyFile):
"""Mixin class for checking that every input file generates a valid assembly
file following the assembly file naming rule, there is no output on
stdout/stderr, and no assembly files have the given substring specified
by unexpected_assembly_substr.
To mix in this class, subclasses need to provde unexpected_assembly_substr
as the substring we expect not to see.
"""
def check_assembly_for_substr(self, status):
for input_filename in status.input_filenames:
assembly_filename = get_assembly_filename(input_filename)
success, message = self.verify_assembly_file_preamble(
os.path.join(status.directory, assembly_filename))
if not success:
return False, message
with open(assembly_filename, 'r') as f:
content = f.read()
if self.unexpected_assembly_substr in convert_to_unix_line_endings(content):
return False, ('Incorrect assembly output:\n{asm}\n'
'Unexpected substring found:\n{unexp}'.format(
asm=content, exp=self.unexpected_assembly_substr))
return True, ''
class ValidNamedAssemblyFile(SuccessfulReturn, CorrectAssemblyFilePreamble):
"""Mixin class for checking that a list of assembly files with the given
names are correctly generated, and there is no output on stdout/stderr.
To mix in this class, subclasses need to provide expected_assembly_filenames
as the expected assembly filenames.
"""
def check_object_file_preamble(self, status):
for assembly_filename in self.expected_assembly_filenames:
success, message = self.verify_assembly_file_preamble(
os.path.join(status.directory, assembly_filename))
if not success:
return False, message
return True, ''
class ErrorMessage(GlslCTest):
"""Mixin class for tests that fail with a specific error message.
To mix in this class, subclasses need to provide expected_error as the
expected error message.
The test should fail if the subprocess was terminated by a signal.
"""
def check_has_error_message(self, status):
if not status.returncode:
return False, ('Expected error message, but returned success from '
'glslc')
if status.returncode < 0:
# On Unix, a negative value -N for Popen.returncode indicates
# termination by signal N.
# https://docs.python.org/2/library/subprocess.html
return False, ('Expected error message, but glslc was terminated by '
'signal ' + str(status.returncode))
if not status.stderr:
return False, 'Expected error message, but no output on stderr'
if self.expected_error != convert_to_unix_line_endings(status.stderr):
return False, ('Incorrect stderr output:\n{act}\n'
'Expected:\n{exp}'.format(
act=status.stderr, exp=self.expected_error))
return True, ''
class ErrorMessageSubstr(GlslCTest):
"""Mixin class for tests that fail with a specific substring in the error
message.
To mix in this class, subclasses need to provide expected_error_substr as
the expected error message substring.
The test should fail if the subprocess was terminated by a signal.
"""
def check_has_error_message_as_substring(self, status):
if not status.returncode:
return False, ('Expected error message, but returned success from '
'glslc')
if status.returncode < 0:
# On Unix, a negative value -N for Popen.returncode indicates
# termination by signal N.
# https://docs.python.org/2/library/subprocess.html
return False, ('Expected error message, but glslc was terminated by '
'signal ' + str(status.returncode))
if not status.stderr:
return False, 'Expected error message, but no output on stderr'
if self.expected_error_substr not in convert_to_unix_line_endings(status.stderr):
return False, ('Incorrect stderr output:\n{act}\n'
'Expected substring not found in stderr:\n{exp}'.format(
act=status.stderr, exp=self.expected_error_substr))
return True, ''
class WarningMessage(GlslCTest):
"""Mixin class for tests that succeed but have a specific warning message.
To mix in this class, subclasses need to provide expected_warning as the
expected warning message.
"""
def check_has_warning_message(self, status):
if status.returncode:
return False, ('Expected warning message, but returned failure from'
' glslc')
if not status.stderr:
return False, 'Expected warning message, but no output on stderr'
if self.expected_warning != convert_to_unix_line_endings(status.stderr):
return False, ('Incorrect stderr output:\n{act}\n'
'Expected:\n{exp}'.format(
act=status.stderr, exp=self.expected_warning))
return True, ''
class ValidObjectFileWithWarning(
NoOutputOnStdout, CorrectObjectFilePreamble, WarningMessage):
"""Mixin class for checking that every input file generates a valid object
file following the object file naming rule, with a specific warning message.
"""
def check_object_file_preamble(self, status):
for input_filename in status.input_filenames:
object_filename = get_object_filename(input_filename)
success, message = self.verify_object_file_preamble(
os.path.join(status.directory, object_filename))
if not success:
return False, message
return True, ''
class ValidAssemblyFileWithWarning(
NoOutputOnStdout, CorrectAssemblyFilePreamble, WarningMessage):
"""Mixin class for checking that every input file generates a valid assembly
file following the assembly file naming rule, with a specific warning
message."""
def check_assembly_file_preamble(self, status):
for input_filename in status.input_filenames:
assembly_filename = get_assembly_filename(input_filename)
success, message = self.verify_assembly_file_preamble(
os.path.join(status.directory, assembly_filename))
if not success:
return False, message
return True, ''
class StdoutMatch(GlslCTest):
"""Mixin class for tests that can expect output on stdout.
To mix in this class, subclasses need to provide expected_stdout as the
expected stdout output.
For expected_stdout, if it's True, then they expect something on stdout but
will not check what it is. If it's a string, expect an exact match. If it's
anything else, expect expected_stdout.search(stdout) to be true.
"""
def check_stdout_match(self, status):
# "True" in this case means we expect something on stdout, but we do not
# care what it is, we want to distinguish this from "blah" which means we
# expect exactly the string "blah".
if self.expected_stdout is True:
if not status.stdout:
return False, 'Expected something on stdout'
elif type(self.expected_stdout) == str:
if self.expected_stdout != convert_to_unix_line_endings(
status.stdout):
return False, ('Incorrect stdout output:\n{ac}\n'
'Expected:\n{ex}'.format(
ac=status.stdout, ex=self.expected_stdout))
else:
if not self.expected_stdout.search(convert_to_unix_line_endings(
status.stdout)):
return False, ('Incorrect stdout output:\n{ac}\n'
'Expected to match regex:\n{ex}'.format(
ac=status.stdout,
ex=self.expected_stdout.pattern))
return True, ''
class StderrMatch(GlslCTest):
"""Mixin class for tests that can expect output on stderr.
To mix in this class, subclasses need to provide expected_stderr as the
expected stderr output.
For expected_stderr, if it's True, then they expect something on stderr,
but will not check what it is. If it's a string, expect an exact match.
"""
def check_stderr_match(self, status):
# "True" in this case means we expect something on stderr, but we do not
# care what it is, we want to distinguish this from "blah" which means we
# expect exactly the string "blah".
if self.expected_stderr is True:
if not status.stderr:
return False, 'Expected something on stderr'
else:
if self.expected_stderr != convert_to_unix_line_endings(
status.stderr):
return False, ('Incorrect stderr output:\n{ac}\n'
'Expected:\n{ex}'.format(
ac=status.stderr, ex=self.expected_stderr))
return True, ''
class StdoutNoWiderThan80Columns(GlslCTest):
"""Mixin class for tests that require stdout to 80 characters or narrower.
To mix in this class, subclasses need to provide expected_stdout as the
expected stdout output.
"""
def check_stdout_not_too_wide(self, status):
if not status.stdout:
return True, ''
else:
for line in status.stdout.splitlines():
if len(line) > 80:
return False, ('Stdout line longer than 80 columns: %s'
% line)
return True, ''
class NoObjectFile(GlslCTest):
"""Mixin class for checking that no input file has a corresponding object
file."""
def check_no_object_file(self, status):
for input_filename in status.input_filenames:
object_filename = get_object_filename(input_filename)
full_object_file = os.path.join(status.directory, object_filename)
print("checking %s" % full_object_file)
if os.path.isfile(full_object_file):
return False, ('Expected no object file, but found: %s'
% full_object_file)
return True, ''
class NoNamedOutputFiles(GlslCTest):
"""Mixin class for checking that no specified output files exist.
The expected_output_filenames member should be full pathnames."""
def check_no_named_output_files(self, status):
for object_filename in self.expected_output_filenames:
if os.path.isfile(object_filename):
return False, ('Expected no output file, but found: %s'
% object_filename)
return True, ''