1 files changed, 159 insertions, 0 deletions
diff --git a/js/src/builtin/embedjs.py b/js/src/builtin/embedjs.py
new file mode 100644
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+++ b/js/src/builtin/embedjs.py
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+# 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)