Non-SFI mode: Add Linux asynchronous signal support

src/public/nonsfi/irt_exception_handling.h

Index: src/public/nonsfi/irt_exception_handling.h
diff --git a/src/public/nonsfi/irt_exception_handling.h b/src/public/nonsfi/irt_exception_handling.h
deleted file mode 100644
index 6af2f589bcd94069676ab1fc32645f46c0273b60..0000000000000000000000000000000000000000
--- a/src/public/nonsfi/irt_exception_handling.h
+++ /dev/null
@@ -1,19 +0,0 @@
-/*
- * Copyright (c) 2014 The Native Client Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef NATIVE_CLIENT_SRC_PUBLIC_NONSFI_IRT_EXCEPTION_HANDLING_H_
-#define NATIVE_CLIENT_SRC_PUBLIC_NONSFI_IRT_EXCEPTION_HANDLING_H_ 1
-
-#include "native_client/src/include/nacl_base.h"
-
-EXTERN_C_BEGIN
-
-/* Initialize signal handler at startup before entering sandbox. */
-void nonsfi_initialize_signal_handler(void);

[Mark Seaborn, 2015/08/12 01:43:06]

Removing this from src/public/ would break the DEPS roll into Chromium.  This is
referred to by components/nacl/loader/nacl_helper_linux.cc.  Please stage the
change so that a trivial DEPS roll will work.

How about just keeping the function name and header file name the same?

[Luis Héctor Chávez, 2015/08/12 22:14:25]

The DEPS roll would also be broken by the flags change in the call to clone().
Should I do the roll to make sure both this and the corresponding sandbox change
are done in the same change?

[Mark Seaborn, 2015/08/13 21:17:50]

No, it's better to avoid non-trivial DEPS rolls whenever possible.

See:
https://docs.google.com/document/d/1jHoLo9I3CCS1_-4KlIq1OiEMv9cmMuXES2Z9JVpmP...

Can you change the Chromium side to allow the new clone() flags first?

[Luis Héctor Chávez, 2015/08/13 22:48:12]

Done.

-
-EXTERN_C_END
-
-#endif