The non-cgo test points Segv and TgkillSegv are currently in
testprogcgo. Although the test points don't explicitly use cgo,
being a cgo program, there is still some C code that runs when
the test point is invoked, such as thread creation code.
For the cgo test points, sometimes we fail to unwind the stack if
C code is involved. For the non-cgo ones, we want to always be
able to unwind the stack, so we check for stack unwinding failures.
But if a signal is landed in the small piece of C code mentioned
above, we may still fail to unwind. Move the non-cgo test points
to a pure-Go program to avoid this problem.
May fix #52963.
Updates #59029, #59443, #59492.
Change-Id: I35d99a0dd4c7cdb627e2083d2414887a24a2822d
Reviewed-on: https://go-review.googlesource.com/c/go/+/500535 Reviewed-by: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Cherry Mui <cherryyz@google.com>