fix: pass negative error code to Error::from_raw_os_error

[honsunrise]

Since libbpf_get_error always returns negative error code, it should be inverted before passing in Error::from_raw_os_error.

[danielocfb]

What's the call you made that failed with a negative error code in this way @honsunrise ?

[honsunrise]

The call stack:

thread 'runtime::tests::runtime_loop_test' panicked at /builds/collie/agent/.cargo/registry/src/mirrors.dev.in.chaitin.net-466efa1d1eb93b42/libbpf-rs-0.22.1/src/error.rs:334:9:
OS error code should be positive integer; got: -2
stack backtrace:
   0:     0x5651f4d77716 - std::backtrace_rs::backtrace::libunwind::trace::h24a2eb3edb39d0f3
                               at /rustc/878c8a2a62d49ca5c454547ad67290a1df746cb5/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5
   1:     0x5651f4d77716 - std::backtrace_rs::backtrace::trace_unsynchronized::h9690b32974005e28
                               at /rustc/878c8a2a62d49ca5c454547ad67290a1df746cb5/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x5651f4d77716 - std::sys_common::backtrace::_print_fmt::h50333491dc4fc462
                               at /rustc/878c8a2a62d49ca5c454547ad67290a1df746cb5/library/std/src/sys_common/backtrace.rs:68:5
   3:     0x5651f4d77716 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::he8279f297710df71
                               at /rustc/878c8a2a62d49ca5c454547ad67290a1df746cb5/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x5651f4da644c - core::fmt::rt::Argument::fmt::h4c6b6c3e0f65b4f1
                               at /rustc/878c8a2a62d49ca5c454547ad67290a1df746cb5/library/core/src/fmt/rt.rs:142:9
   5:     0x5651f4da644c - core::fmt::write::h361c1f46d14a47aa
                               at /rustc/878c8a2a62d49ca5c454547ad67290a1df746cb5/library/core/src/fmt/mod.rs:1120:17
   6:     0x5651f4d7388f - std::io::Write::write_fmt::h7e6f4046f5f4bd4f
                               at /rustc/878c8a2a62d49ca5c454547ad67290a1df746cb5/library/std/src/io/mod.rs:1846:15
   7:     0x5651f4d774c4 - std::sys_common::backtrace::_print::hb7c6965646d03340
                               at /rustc/878c8a2a62d49ca5c454547ad67290a1df746cb5/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x5651f4d774c4 - std::sys_common::backtrace::print::h2d4726478ed3fcc3
                               at /rustc/878c8a2a62d49ca5c454547ad67290a1df746cb5/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x5651f4d791ab - std::panicking::default_hook::{{closure}}::h349609a89998c39e
  10:     0x5651f4d78e8b - std::panicking::default_hook::h56f95df654325ad9
                               at /rustc/878c8a2a62d49ca5c454547ad67290a1df746cb5/library/std/src/panicking.rs:289:9
  11:     0x5651f3025b37 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hf64406b5442f710d
                               at /rustc/878c8a2a62d49ca5c454547ad67290a1df746cb5/library/alloc/src/boxed.rs:2030:9
  12:     0x5651f3025b37 - test::test_main::{{closure}}::h974315e22cc09cfb
                               at /rustc/878c8a2a62d49ca5c454547ad67290a1df746cb5/library/test/src/lib.rs:138:21
  13:     0x5651f4d797e0 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h3ba55c6055e52deb
                               at /rustc/878c8a2a62d49ca5c454547ad67290a1df746cb5/library/alloc/src/boxed.rs:2030:9
  14:     0x5651f4d797e0 - std::panicking::rust_panic_with_hook::h98b728a1b3f62701
                               at /rustc/878c8a2a62d49ca5c454547ad67290a1df746cb5/library/std/src/panicking.rs:783:13
  15:     0x5651f4d79522 - std::panicking::begin_panic_handler::{{closure}}::h3998c72d5aeca2ca
                               at /rustc/878c8a2a62d49ca5c454547ad67290a1df746cb5/library/std/src/panicking.rs:657:13
  16:     0x5651f4d77bf6 - std::sys_common::backtrace::__rust_end_short_backtrace::h4da7fe95a2aa1e6f
                               at /rustc/878c8a2a62d49ca5c454547ad67290a1df746cb5/library/std/src/sys_common/backtrace.rs:171:18
  17:     0x5651f4d79254 - rust_begin_unwind
                               at /rustc/878c8a2a62d49ca5c454547ad67290a1df746cb5/library/std/src/panicking.rs:645:5
  18:     0x5651f275ecc5 - core::panicking::panic_fmt::h9fa2a341c4c930d8
                               at /rustc/878c8a2a62d49ca5c454547ad67290a1df746cb5/library/core/src/panicking.rs:72:14
  19:     0x5651f35092cc - libbpf_rs::error::Error::from_raw_os_error::he287ba41575176a6
                               at /builds/collie/agent/.cargo/registry/src/mirrors.dev.in.chaitin.net-466efa1d1eb93b42/libbpf-rs-0.22.1/src/error.rs:334:9
  20:     0x5651f350f08c - libbpf_rs::util::create_bpf_entity_checked_opt::h5432dc8835851f96
                               at /builds/collie/agent/.cargo/registry/src/mirrors.dev.in.chaitin.net-466efa1d1eb93b42/libbpf-rs-0.22.1/src/util.rs:124:20
  21:     0x5651f350ef1a - libbpf_rs::util::create_bpf_entity_checked::h64b4241ba097e860
                               at /builds/collie/agent/.cargo/registry/src/mirrors.dev.in.chaitin.net-466efa1d1eb93b42/libbpf-rs-0.22.1/src/util.rs:93:5
  22:     0x5651f3502e29 - libbpf_rs::program::Program::attach_tracepoint_impl::h5af7f392f33cff5e
                               at /builds/collie/agent/.cargo/registry/src/mirrors.dev.in.chaitin.net-466efa1d1eb93b42/libbpf-rs-0.22.1/src/program.rs:628:9
  23:     0x5651f34bb1f6 - libbpf_rs::program::Program::attach_tracepoint::h96e81702024b3a5d
                               at /builds/collie/agent/.cargo/registry/src/mirrors.dev.in.chaitin.net-466efa1d1eb93b42/libbpf-rs-0.22.1/src/program.rs:662:9

[honsunrise]

What's the call you made that failed with a negative error code in this way @honsunrise ?

Error::from_raw_os_error check the error code must be positive integer.

libbpf-rs/libbpf-rs/src/error.rs

Lines 332 to 339 in 3fd4a11

	#[inline]
	pub fn from_raw_os_error(code: i32) -> Self {
	debug_assert!(
	code > 0,
	"OS error code should be positive integer; got: {code}"
	);
	Self::from(io::Error::from_raw_os_error(code))
	}

[danielocfb]

Thanks!