* Move irregexp backtrack stack to external memory area, instead of the system stack.

src/SConscript

 # Copyright 2008 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
@@ skipping 26 matching lines @@
   'all': [
     'accessors.cc', 'allocation.cc', 'api.cc', 'assembler.cc', 'ast.cc',
     'bootstrapper.cc', 'builtins.cc', 'checks.cc', 'code-stubs.cc',
     'codegen.cc', 'compilation-cache.cc', 'compiler.cc', 'contexts.cc',
     'conversions.cc', 'counters.cc', 'dateparser.cc', 'debug.cc',
     'disassembler.cc', 'execution.cc', 'factory.cc', 'flags.cc', 'frames.cc',
     'global-handles.cc', 'handles.cc', 'hashmap.cc', 'heap.cc', 'ic.cc',
     'interpreter-irregexp.cc', 'jsregexp.cc', 'log.cc', 'mark-compact.cc',
     'messages.cc', 'objects.cc', 'parser.cc', 'property.cc',
     'regexp-macro-assembler.cc', 'regexp-macro-assembler-irregexp.cc',
-    'rewriter.cc', 'runtime.cc', 'scanner.cc', 'scopeinfo.cc', 'scopes.cc',
-    'serialize.cc', 'snapshot-common.cc', 'spaces.cc', 'string-stream.cc',
-    'stub-cache.cc', 'token.cc', 'top.cc', 'unicode.cc', 'usage-analyzer.cc',
-    'utils.cc', 'v8-counters.cc', 'v8.cc', 'v8threads.cc', 'variables.cc',
-    'zone.cc'
+    'regexp-stack.cc', 'rewriter.cc', 'runtime.cc', 'scanner.cc',
+    'scopeinfo.cc', 'scopes.cc', 'serialize.cc', 'snapshot-common.cc',
+    'spaces.cc', 'string-stream.cc', 'stub-cache.cc', 'token.cc', 'top.cc',
+    'unicode.cc', 'usage-analyzer.cc', 'utils.cc', 'v8-counters.cc', 'v8.cc',
+    'v8threads.cc', 'variables.cc', 'zone.cc'
   ],
   'arch:arm':  ['assembler-arm.cc', 'builtins-arm.cc', 'codegen-arm.cc',
       'cpu-arm.cc', 'debug-arm.cc', 'disasm-arm.cc', 'frames-arm.cc',
       'ic-arm.cc', 'macro-assembler-arm.cc', 'regexp-macro-assembler-arm.cc', 
       'stub-cache-arm.cc'],
   'arch:ia32': ['assembler-ia32.cc', 'builtins-ia32.cc', 'codegen-ia32.cc',
       'cpu-ia32.cc', 'debug-ia32.cc', 'disasm-ia32.cc', 'frames-ia32.cc',
       'ic-ia32.cc', 'macro-assembler-ia32.cc', 'regexp-macro-assembler-ia32.cc',
       'stub-cache-ia32.cc'],
   'simulator:arm': ['simulator-arm.cc'],
@@ skipping 96 matching lines @@
     libraries_obj = context.ConfigureObject(env, libraries_empty_src, CPPPATH=['.'])
   else:
     snapshot_obj = empty_snapshot_obj
 
   library_objs = [non_snapshot_files, libraries_obj, snapshot_obj]
   return (library_objs, d8_objs)
 
 
 (library_objs, d8_objs) = ConfigureObjectFiles()
 Return('library_objs d8_objs')