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libgo patch committed: Fix sigfwd to not allocate memory

From: Ian Lance Taylor <iant at golang dot org>
To: gcc-patches <gcc-patches at gcc dot gnu dot org>, "gofrontend-dev at googlegroups dot com" <gofrontend-dev at googlegroups dot com>
Date: Tue, 28 Feb 2017 07:13:23 -0800
Subject: libgo patch committed: Fix sigfwd to not allocate memory
Authentication-results: sourceware.org; auth=none

This patch to libgo fixes sigfwd to not allocate memory.  The use of
&[1]uintptr{fn} was causing memory allocation, even though it is being
compiled for the runtime package.  That is a bad idea for this
function, which is invoked by a signal handler.  Rewrite it to use
only constructs that do not allocate memory when compiled for the
runtime package.

The test for this is misc/cgo/testcarchive in the main repo, which we
don't yet test.

Bootstrapped and ran Go testsuite on x86_64-pc-linux-gnu.  Committed
to mainline.

Ian

Attachment: patch.txt
Description: Text document

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