Fwd: Go patch committed: enable -fkeep-gc-roots-live for Go

Fwd: Go patch committed: enable -fkeep-gc-roots-live for Go

[Ian Lance Taylor]

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Java maintainers: you may want to implement a similar patch for the
Java frontend.

See the discussion about the new option at

https://gcc.gnu.org/ml/gcc/2016-01/msg00023.html

https://gcc.gnu.org/ml/gcc-patches/2016-01/msg01483.html

Ian


---------- Forwarded message ----------
From: Ian Lance Taylor <iant@golang.org>
Date: Wed, Jan 27, 2016 at 10:37 AM
Subject: Go patch committed: enable -fkeep-gc-roots-live for Go
To: gcc-patches <gcc-patches@gcc.gnu.org>,
"gofrontend-dev@googlegroups.com" <gofrontend-dev@googlegroups.com>


This patch enables the new -fkeep-gc-roots-live option for Go.  This
fixes https://golang.org/issue/13662 .  Bootstrapped and ran Go
testsuite on x86_64-pc-linux-gnu.  Committed to mainline.

Ian

2016-01-27  Ian Lance Taylor  <iant@google.com>

* go-lang.c (go_langhook_init_options_struct): Default to
-fkeep-gc-roots-live.

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Index: gcc/go/go-lang.c
===================================================================
--- gcc/go/go-lang.c	(revision 232888)
+++ gcc/go/go-lang.c	(working copy)
@@ -150,6 +150,9 @@
   opts->x_flag_exceptions = 1;
   opts->x_flag_non_call_exceptions = 1;
 
+  /* We need to keep pointers live for the garbage collector.  */
+  opts->x_flag_keep_gc_roots_live = 1;
+
   /* Go programs expect runtime.Callers to work, and that uses
      libbacktrace that uses debug info.  Set the debug info level to 1
      by default.  In post_options we will set the debug type if the