tree a708417c0f6bbe1261256b22964b9c6e594e9ff1
parent d9a30434440469c640a120fe7132057f5644d38c
author Cherry Zhang <cherryyz@google.com> 1546023933 -0500
committer Ian Lance Taylor <iant@golang.org> 1546041985 +0000

runtime: prevent deadlock when profiling signal arrives in stack scan

Precise stack scan needs to unwind the stack. When it is
unwinding the stack, if a profiling signal arrives, which also
does a traceback, it may deadlock in dl_iterate_phdr. Prevent
this deadlock by setting up runtime_in_callers before traceback.

Change-Id: If9b15dd00f1d3f6ce557ea740d9fd6fd3b842879
Reviewed-on: https://go-review.googlesource.com/c/155766
Reviewed-by: Ian Lance Taylor <iant@golang.org>