runtime: GDB tests fail on freebsd/arm builder

[bradfitz]

From #28679 (comment) ...

This is still failing freebsd-arm-paulzhol builds.
Latest failure: https://build.golang.org/log/d9278491818714d74a9190557d6107f737d48612

Is it feasible to disable this test, as @bradfitz suggested earlier? Or is there something else that can be tried?

Disabling for now.

/cc @paulzhol

[gopherbot]

Change https://golang.org/cl/155932 mentions this issue: runtime: disable GDB tests on freebsd/arm for now

[paulzhol]

I've booted the older 11.2 image and ran the test:

[paulzhol@arm-virt /tmp/go/src/runtime]$ ../../bin/go test -v -run "GdbPython$"                                    
=== RUN   TestGdbPython                                                                                            
=== PAUSE TestGdbPython                                                                                            
=== CONT  TestGdbPython                                                                                            
--- SKIP: TestGdbPython (0.25s)                                                                                    
    runtime-gdb_test.go:68: skipping: gdb version 6.1 too old                                                      
PASS                                                                                                               
ok      runtime 0.373s

That is the in-tree gdb, it's really old.

[paulzhol@arm-virt /tmp/go/src/runtime]$ gdb                                                                       
GNU gdb 6.1.1 [FreeBSD]                                                                                            
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "armv6-marcel-freebsd".

It seems it was finally retired from FreeBSD 12 as intended.
If I modify the test to use the ports collection gdb81, the test fails the same as with the GDB 8.2 builder log.

This raises several concerns:

• All our amd64 builders except the FreeBSD 12 one have an ancient GDB, so they have always skipped the test.
• The FreeBSD 12 image needs to be updated to install a gdb from the ports collection as it has none at all.
• This will cause the test to fail, so it needs to be disabled on all GOARCHes, not just arm.

[bradfitz]

Send the CL to always skip the tests on all GOARCH values for GOOS freebsd first, and then we can update the image to include a newer gdb and work on fixing the issue (and remove the t.Skip)

[gopherbot]

Change https://golang.org/cl/156717 mentions this issue: runtime: disable GDB tests on freebsd on all GOARCH values

[gopherbot]

Change https://golang.org/cl/160800 mentions this issue: [release-branch.go1.11] runtime: disable GDB tests on freebsd on all GOARCH values