Capture Mozilla's codesighs, for use in executable sizing.

Vanilla code, no changes, except for the addition of:
* LICENSE, copied from elsewhere in the Mozilla tree;
* README.chromium, documenting what's going on.
* codesighs.gyp, for building with the rest of Chromium.
Review URL: http://codereview.chromium.org/93155

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@14522 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 105 insertions, 0 deletions

diff --git a/third_party/codesighs/nm_wrap_osx.pl b/third_party/codesighs/nm_wrap_osx.pl
new file mode 100755
index 0000000..cf1181f
--- /dev/null
+++ b/third_party/codesighs/nm_wrap_osx.pl
@@ -0,0 +1,105 @@
+#!/usr/bin/perl -w
+#
+# ***** BEGIN LICENSE BLOCK *****
+# Version: MPL 1.1/GPL 2.0/LGPL 2.1
+#
+# The contents of this file are subject to the Mozilla Public License Version
+# 1.1 (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.mozilla.org/MPL/
+#
+# Software distributed under the License is distributed on an "AS IS" basis,
+# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+# for the specific language governing rights and limitations under the
+# License.
+#
+# The Original Code is autosummary.linx.bash code, released
+# Oct 10, 2002.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2002
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Simon Fraser <sfraser@netscape.com>
+#
+# Alternatively, the contents of this file may be used under the terms of
+# either the GNU General Public License Version 2 or later (the "GPL"), or
+# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+# in which case the provisions of the GPL or the LGPL are applicable instead
+# of those above. If you wish to allow use of your version of this file only
+# under the terms of either the GPL or the LGPL, and not to allow others to
+# use your version of this file under the terms of the MPL, indicate your
+# decision by deleting the provisions above and replace them with the notice
+# and other provisions required by the GPL or the LGPL. If you do not delete
+# the provisions above, a recipient may use your version of this file under
+# the terms of any one of the MPL, the GPL or the LGPL.
+#
+# ***** END LICENSE BLOCK *****
+
+use strict;
+
+#
+# A wrapper for nm that produces output listing symbol size.
+#
+my($prev_addr) = 0;
+my($prev_module) = "";
+my($prev_kind) = "";
+my($prev_symbol) = "";
+
+open(NM_OUTPUT, "nm -fnol $ARGV[0] | c++filt |") or die "nm failed to run on $ARGV[0]\n";
+while (<NM_OUTPUT>)
+{
+  my($line) = $_;
+  chomp($line);
+  
+  if ($line =~ /^([^:]+):\s*([0-9a-f]{8}) (\w) (.+)$/)
+  {
+    my($module) = $1;
+    my($addr)   = $2;
+    my($kind)   = $3;
+    my($symbol) = $4;
+
+    #Skip absolute addresses, there should be only a few
+    if ('a' eq lc $kind) {
+        if ('trampoline_size' ne $symbol) {
+            warn "Encountered unknown absolutely addressed symbol '$symbol' in $module";
+        }
+        next;
+    }
+
+    # we expect the input to have been piped through c++filt to
+    # demangle symbols. For some reason, it doesn't always demangle
+    # all of them, so push still-mangled symbols back through c++filt again.
+    if ($symbol =~ /^(_[_Z].+)/)
+    {
+      # warn "Trying again to unmangle $1\n";
+      $symbol = `c++filt '$1'`;
+      chomp($symbol);
+      # warn "Unmangling again to $symbol\n";
+    }
+
+    my($prev_size) = hex($addr) - hex($prev_addr);
+    # print "Outputting line $line\n";
+
+    # always print one behind, because only now do we know its size
+    if ($prev_module ne "") {
+      printf "%s:%08x %s %s\n", $prev_module, $prev_size, $prev_kind, $prev_symbol;
+    }
+      
+    $prev_addr   = $addr;
+    $prev_module = $module;
+    $prev_kind   = $kind;
+    $prev_symbol = $symbol;
+  }
+  else
+  {
+    # warn "   Discaring line $line\n";
+  }
+}
+
+# we don't know how big the last symbol is, so always show 4.
+if ($prev_module ne "") {
+  printf "%s:%08x %s %s\n", $prev_module, 4, $prev_kind, $prev_symbol;
+}