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| author | Ian Lance Taylor <ian@gcc.gnu.org> | 2017-06-22 14:33:13 +0000 |
|---|---|---|
| committer | Ian Lance Taylor <ian@gcc.gnu.org> | 2017-06-22 14:33:13 +0000 |
| commit | c8a47c4877889b42afc5e3804c0fc575770564f2 (patch) | |
| tree | cd867e8bbd31844fdb91beae7951b4a13cc9ceb6 /gcc | |
| parent | b92e4dff0a767a4e39dac6a012e381816ee5937a (diff) | |
| download | gcc-c8a47c4877889b42afc5e3804c0fc575770564f2.zip gcc-c8a47c4877889b42afc5e3804c0fc575770564f2.tar.gz gcc-c8a47c4877889b42afc5e3804c0fc575770564f2.tar.bz2 | |
runtime: avoid write barriers when calling deferred function
Calling a deferred function currently requires changing from a uintptr
to the function code to a Go function value. That is done by setting
the value of a func local variable using unsafe.Pointer. The local
variable will always be on the stack. Adjust the code that sets the
local variable to avoid generating a write barrier.
A write barrier is never needed here. Also, for deferreturn, we must
avoid write barriers entirely when called from a cgo function; that
requires more than just this, but this is a start.
The test for this is runtime tests that use the go tool; these are not
currently run, but they will be in the future.
Reviewed-on: https://go-review.googlesource.com/46455
From-SVN: r249559
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/go/gofrontend/MERGE | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/gcc/go/gofrontend/MERGE b/gcc/go/gofrontend/MERGE index 8ce4017..a8dba360 100644 --- a/gcc/go/gofrontend/MERGE +++ b/gcc/go/gofrontend/MERGE @@ -1,4 +1,4 @@ -a459f1fdfe0bd365bf2def730e1529052c6487fd +73b14da15ec731837ce2a45db658142bfbf5fe22 The first line of this file holds the git revision number of the last merge done from the gofrontend repository. |