runtime: fix build after CL 9164 on Linux
There is an assumption that the function executed in child thread
created by runtime.close should not return. And different systems
enforce that differently: some exit that thread, some exit the
whole process.
The test TestNewOSProc0 introduced in CL 9161 breaks that assumption,
so we need to adjust the code to only exit the thread should the
called function return.
Change-Id: Id631cb2f02ec6fbd765508377a79f3f96c6a2ed6
Reviewed-on: https://go-review.googlesource.com/9246
Reviewed-by: Dave Cheney <dave@cheney.net>
diff --git a/src/runtime/sys_linux_arm.s b/src/runtime/sys_linux_arm.s
index 9d21eae..d0c6d22 100644
--- a/src/runtime/sys_linux_arm.s
+++ b/src/runtime/sys_linux_arm.s
@@ -307,7 +307,7 @@
MOVW $16(R13), R13
BL (R0)
- // It shouldn't return
+ // It shouldn't return. If it does, exit that thread.
MOVW $0, R0
MOVW R0, 4(R13)
BL runtime·exit1(SB)
