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214 lines
6.7 KiB
214 lines
6.7 KiB
# Copyright (c) 2018 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may 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,
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# WITHOUT 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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"""A number of placeholders and their rules for expansion when used in tests.
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These placeholders, when used in spirv_args or expected_* variables of
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SpirvTest, have special meanings. In spirv_args, they will be substituted by
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the result of instantiate_for_spirv_args(), while in expected_*, by
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instantiate_for_expectation(). A TestCase instance will be passed in as
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argument to the instantiate_*() methods.
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"""
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import os
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import subprocess
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import tempfile
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from string import Template
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class PlaceHolderException(Exception):
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"""Exception class for PlaceHolder."""
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pass
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class PlaceHolder(object):
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"""Base class for placeholders."""
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def instantiate_for_spirv_args(self, testcase):
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"""Instantiation rules for spirv_args.
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This method will be called when the current placeholder appears in
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spirv_args.
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Returns:
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A string to replace the current placeholder in spirv_args.
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"""
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raise PlaceHolderException('Subclass should implement this function.')
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def instantiate_for_expectation(self, testcase):
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"""Instantiation rules for expected_*.
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This method will be called when the current placeholder appears in
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expected_*.
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Returns:
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A string to replace the current placeholder in expected_*.
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"""
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raise PlaceHolderException('Subclass should implement this function.')
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class FileShader(PlaceHolder):
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"""Stands for a shader whose source code is in a file."""
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def __init__(self, source, suffix, assembly_substr=None):
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assert isinstance(source, str)
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assert isinstance(suffix, str)
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self.source = source
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self.suffix = suffix
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self.filename = None
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# If provided, this is a substring which is expected to be in
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# the disassembly of the module generated from this input file.
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self.assembly_substr = assembly_substr
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def instantiate_for_spirv_args(self, testcase):
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"""Creates a temporary file and writes the source into it.
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Returns:
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The name of the temporary file.
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"""
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shader, self.filename = tempfile.mkstemp(
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dir=testcase.directory, suffix=self.suffix)
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shader_object = os.fdopen(shader, 'w')
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shader_object.write(self.source)
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shader_object.close()
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return self.filename
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def instantiate_for_expectation(self, testcase):
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assert self.filename is not None
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return self.filename
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class ConfigFlagsFile(PlaceHolder):
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"""Stands for a configuration file for spirv-opt generated out of a string."""
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def __init__(self, content, suffix):
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assert isinstance(content, str)
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assert isinstance(suffix, str)
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self.content = content
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self.suffix = suffix
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self.filename = None
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def instantiate_for_spirv_args(self, testcase):
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"""Creates a temporary file and writes content into it.
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Returns:
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The name of the temporary file.
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"""
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temp_fd, self.filename = tempfile.mkstemp(
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dir=testcase.directory, suffix=self.suffix)
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fd = os.fdopen(temp_fd, 'w')
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fd.write(self.content)
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fd.close()
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return '-Oconfig=%s' % self.filename
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def instantiate_for_expectation(self, testcase):
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assert self.filename is not None
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return self.filename
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class FileSPIRVShader(PlaceHolder):
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"""Stands for a source shader file which must be converted to SPIR-V."""
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def __init__(self, source, suffix, assembly_substr=None):
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assert isinstance(source, str)
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assert isinstance(suffix, str)
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self.source = source
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self.suffix = suffix
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self.filename = None
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# If provided, this is a substring which is expected to be in
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# the disassembly of the module generated from this input file.
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self.assembly_substr = assembly_substr
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def instantiate_for_spirv_args(self, testcase):
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"""Creates a temporary file, writes the source into it and assembles it.
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Returns:
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The name of the assembled temporary file.
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"""
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shader, asm_filename = tempfile.mkstemp(
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dir=testcase.directory, suffix=self.suffix)
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shader_object = os.fdopen(shader, 'w')
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shader_object.write(self.source)
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shader_object.close()
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self.filename = '%s.spv' % asm_filename
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cmd = [
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testcase.test_manager.assembler_path, asm_filename, '-o', self.filename
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]
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process = subprocess.Popen(
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args=cmd,
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE,
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cwd=testcase.directory)
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output = process.communicate()
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assert process.returncode == 0 and not output[0] and not output[1]
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return self.filename
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def instantiate_for_expectation(self, testcase):
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assert self.filename is not None
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return self.filename
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class StdinShader(PlaceHolder):
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"""Stands for a shader whose source code is from stdin."""
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def __init__(self, source):
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assert isinstance(source, str)
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self.source = source
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self.filename = None
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def instantiate_for_spirv_args(self, testcase):
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"""Writes the source code back to the TestCase instance."""
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testcase.stdin_shader = self.source
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self.filename = '-'
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return self.filename
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def instantiate_for_expectation(self, testcase):
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assert self.filename is not None
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return self.filename
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class TempFileName(PlaceHolder):
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"""Stands for a temporary file's name."""
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def __init__(self, filename):
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assert isinstance(filename, str)
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assert filename != ''
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self.filename = filename
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def instantiate_for_spirv_args(self, testcase):
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return os.path.join(testcase.directory, self.filename)
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def instantiate_for_expectation(self, testcase):
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return os.path.join(testcase.directory, self.filename)
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class SpecializedString(PlaceHolder):
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"""Returns a string that has been specialized based on TestCase.
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The string is specialized by expanding it as a string.Template
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with all of the specialization being done with each $param replaced
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by the associated member on TestCase.
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"""
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def __init__(self, filename):
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assert isinstance(filename, str)
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assert filename != ''
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self.filename = filename
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def instantiate_for_spirv_args(self, testcase):
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return Template(self.filename).substitute(vars(testcase))
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def instantiate_for_expectation(self, testcase):
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return Template(self.filename).substitute(vars(testcase))
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