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runtime: remove stack barriers

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Now that we don't rescan stacks, stack barriers are unnecessary. This
removes all of the code and structures supporting them as well as
tests that were specifically for stack barriers.

Updates #17503.

Change-Id: Ia29221730e0f2bbe7beab4fa757f31a032d9690c
Reviewed-on: https://go-review.googlesource.com/36620
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Austin Clements 2017-02-09 14:03:49 -05:00
parent c5ebcd2c8a
commit d089a6c718
24 changed files with 32 additions and 1100 deletions
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1
src/runtime/panic.go
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@ -617,7 +617,6 @@ func recovery(gp *g) {
// Make the deferproc for this d return again,
// this time returning 1. The calling function will
// jump to the standard return epilogue.
gcUnwindBarriers(gp, sp)
gp.sched.sp = sp
gp.sched.pc = pc
gp.sched.lr = 0