Change helper return values from i32 to i64

[rhdxmr]

Follow up libbpf's 6f8e021c commit

Signed-off-by: Junyeong Jeong [email protected]

This resolves #145

• redbpf_probes::helpers::bpf_probe_read
• redbpf_probes::helpers::bpf_perf_event_output
• redbpf_probes::maps::StackTrace::stack_id
• redbpf_probes::maps::ProgramArray::tail_call

and

• redbpf::StackTrace::get, delete

[rsdy]

This looks good, albeit i'm slightly concerned changing c_int to i64 indiscriminately because on arm64 a lot of amd64 i64's are u64's in this context.

Since it looks like GitHub Actions can't run ARM64 builders right now without extra magic (actions/runner-images#2552), I think we can drop arm64 verification for 2.0 and roll with it.

[rhdxmr]

@rsdy

on arm64 a lot of amd64 i64's are u64's in this context.

what does that mean? I am not familiar with arm64 so I don't get it.

[rsdy]

A fair amount of places where Linux on x86 uses unsigned types, arm64 uses unsigned ones, and it's not always straightforward, where. I don't think it's practically an issue now, as I don't expect many arm64 users.