Builders and GDB permissions

[Daniel Morsing]

Hi there,

Working on https://go-review.googlesource.com/c/go/+/704615, I discovered that some builders allow attaching to a running test with GDB, while others got a permission error. Because of the nature of the change, it's very hard to verify that it is functioning properly without an external core dump, so I'm wondering if it's possible to guarantee that GDB attaching can happen on the builders during tests.

So far, I've found the linux-amd64_avx512 and linux-amd64_debiansid builder failing on ptrace. I'm not sure what the common factor between them is

Cheers,

Daniel