# 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/. # # ToCAsciiArray and ToCArray are from V8's js2c.py. # # Copyright 2012 the V8 project authors. All rights reserved. # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions are # met: # # * Redistributions of source code must retain the above copyright # notice, this list of conditions and the following disclaimer. # * Redistributions in binary form must reproduce the above # copyright notice, this list of conditions and the following # disclaimer in the documentation and/or other materials provided # with the distribution. # * Neither the name of Google Inc. nor the names of its # contributors may be used to endorse or promote products derived # from this software without specific prior written permission. # # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. # This utility converts JS files containing self-hosted builtins into a C # header file that can be embedded into SpiderMonkey. # # It uses the C preprocessor to process its inputs. from __future__ import with_statement import re, sys, os, subprocess import shlex import which import buildconfig def ToCAsciiArray(lines): result = [] for chr in lines: value = ord(chr) assert value < 128 result.append(str(value)) return ", ".join(result) def ToCArray(lines): result = [] for chr in lines: result.append(str(ord(chr))) return ", ".join(result) HEADER_TEMPLATE = """\ /* 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/. */ namespace js { namespace %(namespace)s { static const %(sources_type)s data[] = { %(sources_data)s }; static const %(sources_type)s * const %(sources_name)s = reinterpret_cast<const %(sources_type)s *>(data); uint32_t GetCompressedSize() { return %(compressed_total_length)i; } uint32_t GetRawScriptsSize() { return %(raw_total_length)i; } } // selfhosted } // js """ def embed(cxx, preprocessorOption, msgs, sources, c_out, js_out, namespace, env): combinedSources = '\n'.join([msgs] + ['#include "%(s)s"' % { 's': source } for source in sources]) args = ['-D%(k)s=%(v)s' % { 'k': k, 'v': env[k] } for k in env] preprocessed = preprocess(cxx, preprocessorOption, combinedSources, args) processed = '\n'.join([line for line in preprocessed.splitlines() if \ (line.strip() and not line.startswith('#'))]) js_out.write(processed) import zlib compressed = zlib.compress(processed) data = ToCArray(compressed) c_out.write(HEADER_TEMPLATE % { 'sources_type': 'unsigned char', 'sources_data': data, 'sources_name': 'compressedSources', 'compressed_total_length': len(compressed), 'raw_total_length': len(processed), 'namespace': namespace }) def preprocess(cxx, preprocessorOption, source, args = []): if (not os.path.exists(cxx[0])): cxx[0] = which.which(cxx[0]) # Clang seems to complain and not output anything if the extension of the # input is not something it recognizes, so just fake a .cpp here. tmpIn = 'self-hosting-cpp-input.cpp'; tmpOut = 'self-hosting-preprocessed.pp'; outputArg = shlex.split(preprocessorOption + tmpOut) with open(tmpIn, 'wb') as input: input.write(source) print(' '.join(cxx + outputArg + args + [tmpIn])) result = subprocess.Popen(cxx + outputArg + args + [tmpIn]).wait() if (result != 0): sys.exit(result); with open(tmpOut, 'r') as output: processed = output.read(); os.remove(tmpIn) os.remove(tmpOut) return processed def messages(jsmsg): defines = [] for line in open(jsmsg): match = re.match("MSG_DEF\((JSMSG_(\w+))", line) if match: defines.append("#define %s %i" % (match.group(1), len(defines))) else: # Make sure that MSG_DEF isn't preceded by whitespace assert not line.strip().startswith("MSG_DEF") return '\n'.join(defines) def get_config_defines(buildconfig): # Collect defines equivalent to ACDEFINES and add MOZ_DEBUG_DEFINES. env = {key: value for key, value in buildconfig.defines.iteritems() if key not in buildconfig.non_global_defines} for define in buildconfig.substs['MOZ_DEBUG_DEFINES']: env[define] = 1 return env def process_inputs(namespace, c_out, msg_file, inputs): deps = [path for path in inputs if path.endswith(".h") or path.endswith(".h.js")] sources = [path for path in inputs if path.endswith(".js") and not path.endswith(".h.js")] assert len(deps) + len(sources) == len(inputs) cxx = shlex.split(buildconfig.substs['CXX']) cxx_option = buildconfig.substs['PREPROCESS_OPTION'] env = get_config_defines(buildconfig) js_path = re.sub(r"\.out\.h$", "", c_out.name) + ".js" msgs = messages(msg_file) with open(js_path, 'w') as js_out: embed(cxx, cxx_option, msgs, sources, c_out, js_out, namespace, env) def generate_selfhosted(c_out, msg_file, *inputs): # Called from moz.build to embed selfhosted JS. process_inputs('selfhosted', c_out, msg_file, inputs) def generate_shellmoduleloader(c_out, msg_file, *inputs): # Called from moz.build to embed shell module loader JS. process_inputs('moduleloader', c_out, msg_file, inputs)