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| author | Austin Clements <austin@google.com> | 2016-09-12 17:48:34 -0400 |
|---|---|---|
| committer | Austin Clements <austin@google.com> | 2016-10-19 21:36:37 +0000 |
| commit | 7bc42a145a03d61b504b18d20f2a4e5d8e2436fd (patch) | |
| tree | 232cc3bdce2e54cf015ab4670fd3caa45c26a886 | |
| parent | 5b7497f327f83510193b1ec1de2eabb287a02982 (diff) | |
| download | go-7bc42a145a03d61b504b18d20f2a4e5d8e2436fd.tar.xz | |
runtime: don't reserve space for stack barriers if they're off
Change-Id: I79ebccdaefc434c47b77bd545cc3c50723c18b61
Reviewed-on: https://go-review.googlesource.com/31135
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rick Hudson <rlh@golang.org>
| -rw-r--r-- | src/runtime/mstkbar.go | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/runtime/mstkbar.go b/src/runtime/mstkbar.go index 1bf9d573b7..4415559b6c 100644 --- a/src/runtime/mstkbar.go +++ b/src/runtime/mstkbar.go @@ -148,6 +148,10 @@ var firstStackBarrierOffset = 1024 // gcMaxStackBarriers returns the maximum number of stack barriers // that can be installed in a stack of stackSize bytes. func gcMaxStackBarriers(stackSize int) (n int) { + if debug.gcstackbarrieroff > 0 { + return 0 + } + if firstStackBarrierOffset == 0 { // Special debugging case for inserting stack barriers // at every frame. Steal half of the stack for the |