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| author | Austin Clements <austin@google.com> | 2015-08-26 13:54:26 -0400 |
|---|---|---|
| committer | Austin Clements <austin@google.com> | 2015-08-30 16:06:55 +0000 |
| commit | 3bfc9df21aefe486de2c8a620a36fac178650a8c (patch) | |
| tree | f6748a7e6d6021abde23332d0f977474c43a2065 /src/runtime/runtime1.go | |
| parent | e2bb03f175e162cef9a6639d36483cf5e8be5306 (diff) | |
| download | go-3bfc9df21aefe486de2c8a620a36fac178650a8c.tar.xz | |
runtime: add GODEBUG for stack barriers at every frame
Currently enabling the debugging mode where stack barriers are
installed at every frame requires recompiling the runtime. However,
this is potentially useful for field debugging and for runtime tests,
so make this mode a GODEBUG.
Updates #12238.
Change-Id: I6fb128f598b19568ae723a612e099c0ed96917f5
Reviewed-on: https://go-review.googlesource.com/13947
Reviewed-by: Russ Cox <rsc@golang.org>
Diffstat (limited to 'src/runtime/runtime1.go')
| -rw-r--r-- | src/runtime/runtime1.go | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/runtime/runtime1.go b/src/runtime/runtime1.go index a50e5b618c..134c999088 100644 --- a/src/runtime/runtime1.go +++ b/src/runtime/runtime1.go @@ -310,6 +310,7 @@ var debug struct { gcpacertrace int32 gcshrinkstackoff int32 gcstackbarrieroff int32 + gcstackbarrierall int32 gcstoptheworld int32 gctrace int32 invalidptr int32 @@ -327,6 +328,7 @@ var dbgvars = []dbgVar{ {"gcpacertrace", &debug.gcpacertrace}, {"gcshrinkstackoff", &debug.gcshrinkstackoff}, {"gcstackbarrieroff", &debug.gcstackbarrieroff}, + {"gcstackbarrierall", &debug.gcstackbarrierall}, {"gcstoptheworld", &debug.gcstoptheworld}, {"gctrace", &debug.gctrace}, {"invalidptr", &debug.invalidptr}, @@ -382,6 +384,10 @@ func parsedebugvars() { if islibrary || isarchive { traceback_cache |= 1 } + + if debug.gcstackbarrierall > 0 { + firstStackBarrierOffset = 0 + } } // Poor mans 64-bit division. |