runtime: let ARM32 EABI personality function continue unwind when called from traceback

On ARM32 EABI, unlike other platforms, the personality function is
called during _Unwind_Backtrace (libgcc/
In this case, simply unwind the frame without returning any
handlers. Otherwise traceback will loop if there is a frame with
a defer on stack.

Change-Id: I8697b3cbc0b852422e8cd061bfef3803b74d4185
Reviewed-by: Ian Lance Taylor <>
1 file changed