From 88d3db0a5b5196ed45c96014d5a2d32e4e41e34e Mon Sep 17 00:00:00 2001 From: Russ Cox Date: Wed, 6 Jan 2016 12:45:23 -0500 Subject: [PATCH] runtime: stop traceback at foreign function This can only happen when profiling and there is foreign code at the top of the g0 stack but we're not in cgo. That in turn only happens with the race detector. Fixes #13568. Change-Id: I23775132c9c1a3a3aaae191b318539f368adf25e Reviewed-on: https://go-review.googlesource.com/18322 Reviewed-by: Ian Lance Taylor Run-TryBot: Brad Fitzpatrick TryBot-Result: Gobot Gobot --- src/runtime/traceback.go | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/src/runtime/traceback.go b/src/runtime/traceback.go index 7771426ef9..0e96a28945 100644 --- a/src/runtime/traceback.go +++ b/src/runtime/traceback.go @@ -241,6 +241,11 @@ func gentraceback(pc0, sp0, lr0 uintptr, gp *g, skip int, pcbuf *uintptr, max in // stk is the stack containing sp. // The caller's program counter is lr, unless lr is zero, in which case it is *(uintptr*)sp. f = frame.fn + if f.pcsp == 0 { + // No frame information, must be external function, like race support. + // See golang.org/issue/13568. + break + } // Found an actual function. // Derive frame pointer and link register. -- 2.48.1