runtime: arm can not traceback through sigpanic

[dvyukov]

http://build.golang.org/log/dcfd3fc70d02aafeb8d47d75681c8321e80c6bda

runtime: unexpected return pc for runtime.sigpanic called from 0xffff0fc4
fatal error: unknown caller pc

goroutine 135 [garbage collection]:
runtime.gc(0x1)
    /usr/local/go/src/pkg/runtime/mgc0.c:2056 +0x1c4 fp=0xb6e8ee08
runtime.GC()
    /usr/local/go/src/pkg/runtime/malloc.goc:731 +0x2c fp=0xb6e8ee10
sync/atomic_test.func·037()
    /home/dfc/workspace/linux-arm-cheney-panda-d1188847c1cc/go/src/pkg/sync/atomic/atomic_test.go:1236 +0x24 fp=0xb6e8ee20
----- stack segment boundary -----
runtime.panic(0xfddf0, 0x105005d8)
    /usr/local/go/src/pkg/runtime/panic.c:247 +0xa4 fp=0xb6e8ee74
runtime.panicstring(0x215898)
    /usr/local/go/src/pkg/runtime/panic.c:515 +0x9c fp=0xb6e8ee94
runtime: unexpected return pc for runtime.sigpanic called from 0xffff0fc4
runtime.sigpanic()
    /usr/local/go/src/pkg/runtime/os_linux.c:233 +0x110 fp=0xb6e8eea0
created by testing.RunTests
    /usr/local/go/src/pkg/testing/testing.go:440 +0x6d0

[dvyukov]

Comment 1:

Fixed by
12869043: sync/atomic: trigger paging fault early on linux/arm
https://golang.org/cl/12869043/

Owner changed to @dvyukov.

Status changed to Fixed.