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runtime: fix crash on Plan 9

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Since CL 46037, the runtime is crashing after calling
exitThread on Plan 9.

The exitThread function shouldn't be called on
Plan 9, because the system manages thread stacks.

Fixes #22221.

Change-Id: I5d61c9660a87dc27e4cfcb3ca3ddcb4b752f2397
Reviewed-on: https://go-review.googlesource.com/70190
Run-TryBot: David du Colombier <0intro@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
This commit is contained in:
David du Colombier 2017-10-12 01:39:46 +02:00 committed by Austin Clements
parent a509cae90d
commit 926373ea79
1 changed files with 4 additions and 4 deletions
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8
src/runtime/proc.go
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@ -1170,10 +1170,10 @@ func mstart() {
mstart1(0) mstart1(0)
// Exit this thread. // Exit this thread.
if GOOS == "windows" || GOOS == "solaris" { if GOOS == "windows" || GOOS == "solaris" || GOOS == "plan9" {
// Windows and Solaris always system-allocate the // Window, Solaris and Plan 9 always system-allocate
// stack, but put it in _g_.stack before mstart, so // the stack, but put it in _g_.stack before mstart,
// the logic above hasn't set osStack yet. // so the logic above hasn't set osStack yet.
osStack = true osStack = true
} }
mexit(osStack) mexit(osStack)