1 files changed, 336 insertions, 0 deletions
diff --git a/ipc/ipdl/ipdl.py b/ipc/ipdl/ipdl.py
new file mode 100644
index 0000000000..230e0a213f
--- /dev/null
+++ b/ipc/ipdl/ipdl.py
@@ -0,0 +1,336 @@
+# 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/.
+import optparse
+import os
+import sys
+from configparser import RawConfigParser
+from io import StringIO
+
+import ipdl
+
+
+def log(minv, fmt, *args):
+    if _verbosity >= minv:
+        print(fmt % args)
+
+
+# process command line
+
+
+op = optparse.OptionParser(usage="ipdl.py [options] IPDLfiles...")
+op.add_option(
+    "-I",
+    "--include",
+    dest="includedirs",
+    default=[],
+    action="append",
+    help="Additional directory to search for included protocol specifications",
+)
+op.add_option(
+    "-s",
+    "--sync-msg-list",
+    dest="syncMsgList",
+    default="sync-messages.ini",
+    help="Config file listing allowed sync messages",
+)
+op.add_option(
+    "-m",
+    "--msg-metadata",
+    dest="msgMetadata",
+    default="message-metadata.ini",
+    help="Predicted message sizes for reducing serialization malloc overhead.",
+)
+op.add_option(
+    "-v",
+    "--verbose",
+    dest="verbosity",
+    default=1,
+    action="count",
+    help="Verbose logging (specify -vv or -vvv for very verbose logging)",
+)
+op.add_option(
+    "-q",
+    "--quiet",
+    dest="verbosity",
+    action="store_const",
+    const=0,
+    help="Suppress logging output",
+)
+op.add_option(
+    "-d",
+    "--outheaders-dir",
+    dest="headersdir",
+    default=".",
+    help="""Directory into which C++ headers will be generated.
+A protocol Foo in the namespace bar will cause the headers
+  dir/bar/Foo.h, dir/bar/FooParent.h, and dir/bar/FooParent.h
+to be generated""",
+)
+op.add_option(
+    "-o",
+    "--outcpp-dir",
+    dest="cppdir",
+    default=".",
+    help="""Directory into which C++ sources will be generated
+A protocol Foo in the namespace bar will cause the sources
+  cppdir/FooParent.cpp, cppdir/FooChild.cpp
+to be generated""",
+)
+
+options, files = op.parse_args()
+_verbosity = options.verbosity
+syncMsgList = options.syncMsgList
+msgMetadata = options.msgMetadata
+headersdir = options.headersdir
+cppdir = options.cppdir
+includedirs = [os.path.abspath(incdir) for incdir in options.includedirs]
+
+if not len(files):
+    op.error("No IPDL files specified")
+
+ipcmessagestartpath = os.path.join(headersdir, "IPCMessageStart.h")
+ipc_msgtype_name_path = os.path.join(cppdir, "IPCMessageTypeName.cpp")
+
+log(2, 'Generated C++ headers will be generated relative to "%s"', headersdir)
+log(2, 'Generated C++ sources will be generated in "%s"', cppdir)
+
+allmessages = {}
+allmessageprognames = []
+allprotocols = []
+
+
+def normalizedFilename(f):
+    if f == "-":
+        return "<stdin>"
+    return f
+
+
+log(2, "Reading sync message list")
+parser = RawConfigParser()
+parser.read_file(open(options.syncMsgList))
+syncMsgList = parser.sections()
+
+for section in syncMsgList:
+    if not parser.get(section, "description"):
+        print("Error: Sync message %s lacks a description" % section, file=sys.stderr)
+        sys.exit(1)
+
+# Read message metadata. Right now we only have 'segment_capacity'
+# for the standard segment size used for serialization.
+log(2, "Reading message metadata...")
+msgMetadataConfig = RawConfigParser()
+msgMetadataConfig.read_file(open(options.msgMetadata))
+
+segmentCapacityDict = {}
+for msgName in msgMetadataConfig.sections():
+    if msgMetadataConfig.has_option(msgName, "segment_capacity"):
+        capacity = msgMetadataConfig.get(msgName, "segment_capacity")
+        segmentCapacityDict[msgName] = capacity
+
+# First pass: parse and type-check all protocols
+for f in files:
+    log(2, os.path.basename(f))
+    filename = normalizedFilename(f)
+    if f == "-":
+        fd = sys.stdin
+    else:
+        fd = open(f)
+
+    specstring = fd.read()
+    fd.close()
+
+    ast = ipdl.parse(specstring, filename, includedirs=includedirs)
+    if ast is None:
+        print("Specification could not be parsed.", file=sys.stderr)
+        sys.exit(1)
+
+    log(2, "checking types")
+    if not ipdl.typecheck(ast):
+        print("Specification is not well typed.", file=sys.stderr)
+        sys.exit(1)
+
+    if not ipdl.checkSyncMessage(ast, syncMsgList):
+        print(
+            "Error: New sync IPC messages must be reviewed by an IPC peer and recorded in %s"
+            % options.syncMsgList,
+            file=sys.stderr,
+        )  # NOQA: E501
+        sys.exit(1)
+
+if not ipdl.checkFixedSyncMessages(parser):
+    # Errors have alraedy been printed to stderr, just exit
+    sys.exit(1)
+
+# Second pass: generate code
+for f in files:
+    # Read from parser cache
+    filename = normalizedFilename(f)
+    ast = ipdl.parse(None, filename, includedirs=includedirs)
+    ipdl.gencxx(filename, ast, headersdir, cppdir, segmentCapacityDict)
+
+    if ast.protocol:
+        allmessages[ast.protocol.name] = ipdl.genmsgenum(ast)
+        allprotocols.append(ast.protocol.name)
+        # e.g. PContent::RequestMemoryReport (not prefixed or suffixed.)
+        for md in ast.protocol.messageDecls:
+            allmessageprognames.append("%s::%s" % (md.namespace, md.decl.progname))
+
+allprotocols.sort()
+
+# Check if we have undefined message names in segmentCapacityDict.
+# This is a fool-proof of the 'message-metadata.ini' file.
+undefinedMessages = set(segmentCapacityDict.keys()) - set(allmessageprognames)
+if len(undefinedMessages) > 0:
+    print("Error: Undefined message names in message-metadata.ini:", file=sys.stderr)
+    print(undefinedMessages, file=sys.stderr)
+    sys.exit(1)
+
+ipcmsgstart = StringIO()
+
+print(
+    """
+// CODE GENERATED by ipdl.py. Do not edit.
+
+#ifndef IPCMessageStart_h
+#define IPCMessageStart_h
+
+enum IPCMessageStart {
+""",
+    file=ipcmsgstart,
+)
+
+for name in allprotocols:
+    print("  %sMsgStart," % name, file=ipcmsgstart)
+
+print(
+    """
+  LastMsgIndex
+};
+
+static_assert(LastMsgIndex <= 65536, "need to update IPC_MESSAGE_MACRO");
+
+#endif // ifndef IPCMessageStart_h
+""",
+    file=ipcmsgstart,
+)
+
+ipc_msgtype_name = StringIO()
+print(
+    """
+// CODE GENERATED by ipdl.py. Do not edit.
+#include <cstdint>
+
+#include "mozilla/ipc/ProtocolUtils.h"
+#include "IPCMessageStart.h"
+
+using std::uint32_t;
+
+namespace {
+
+enum IPCMessages {
+""",
+    file=ipc_msgtype_name,
+)
+
+for protocol in sorted(allmessages.keys()):
+    for msg, num in allmessages[protocol].idnums:
+        if num:
+            print("  %s = %s," % (msg, num), file=ipc_msgtype_name)
+        elif not msg.endswith("End"):
+            print("  %s__%s," % (protocol, msg), file=ipc_msgtype_name)
+
+print(
+    """
+};
+
+} // anonymous namespace
+
+namespace IPC {
+
+const char* StringFromIPCMessageType(uint32_t aMessageType)
+{
+  switch (aMessageType) {
+""",
+    file=ipc_msgtype_name,
+)
+
+for protocol in sorted(allmessages.keys()):
+    for msg, num in allmessages[protocol].idnums:
+        if num or msg.endswith("End"):
+            continue
+        print(
+            """
+  case %s__%s:
+    return "%s::%s";"""
+            % (protocol, msg, protocol, msg),
+            file=ipc_msgtype_name,
+        )
+
+print(
+    """
+  case DATA_PIPE_CLOSED_MESSAGE_TYPE:
+    return "DATA_PIPE_CLOSED_MESSAGE";
+  case DATA_PIPE_BYTES_CONSUMED_MESSAGE_TYPE:
+    return "DATA_PIPE_BYTES_CONSUMED_MESSAGE";
+  case ACCEPT_INVITE_MESSAGE_TYPE:
+    return "ACCEPT_INVITE_MESSAGE";
+  case REQUEST_INTRODUCTION_MESSAGE_TYPE:
+    return "REQUEST_INTRODUCTION_MESSAGE";
+  case INTRODUCE_MESSAGE_TYPE:
+    return "INTRODUCE_MESSAGE";
+  case BROADCAST_MESSAGE_TYPE:
+    return "BROADCAST_MESSAGE";
+  case EVENT_MESSAGE_TYPE:
+    return "EVENT_MESSAGE";
+  case IMPENDING_SHUTDOWN_MESSAGE_TYPE:
+    return "IMPENDING_SHUTDOWN";
+  case BUILD_IDS_MATCH_MESSAGE_TYPE:
+    return "BUILD_IDS_MATCH_MESSAGE";
+  case BUILD_ID_MESSAGE_TYPE:
+    return "BUILD_ID_MESSAGE";
+  case CHANNEL_OPENED_MESSAGE_TYPE:
+    return "CHANNEL_OPENED_MESSAGE";
+  case SHMEM_DESTROYED_MESSAGE_TYPE:
+    return "SHMEM_DESTROYED_MESSAGE";
+  case SHMEM_CREATED_MESSAGE_TYPE:
+    return "SHMEM_CREATED_MESSAGE";
+  case GOODBYE_MESSAGE_TYPE:
+    return "GOODBYE_MESSAGE";
+  case CANCEL_MESSAGE_TYPE:
+    return "CANCEL_MESSAGE";
+  default:
+    return "<unknown IPC msg name>";
+  }
+}
+
+} // namespace IPC
+
+namespace mozilla {
+namespace ipc {
+
+const char* ProtocolIdToName(IPCMessageStart aId) {
+  switch (aId) {
+""",
+    file=ipc_msgtype_name,
+)
+
+for name in allprotocols:
+    print("    case %sMsgStart:" % name, file=ipc_msgtype_name)
+    print('      return "%s";' % name, file=ipc_msgtype_name)
+
+print(
+    """
+  default:
+    return "<unknown protocol id>";
+  }
+}
+
+} // namespace ipc
+} // namespace mozilla
+""",
+    file=ipc_msgtype_name,
+)
+
+ipdl.writeifmodified(ipcmsgstart.getvalue(), ipcmessagestartpath)
+ipdl.writeifmodified(ipc_msgtype_name.getvalue(), ipc_msgtype_name_path)