Async functions panic when using nodejs dlopen. #2847
Description
When loading a native module created with napi-rs v3 using dlopen, asynchronous function calls panic.
This problem did not occur with napi v2.
This issue can be avoided by using require instead of dlopen, so this issue does not need to be resolved, but is this the expected behavior?
Reproduction
- Create a napi project with
napi newandcargo add napi -F async - Add an async function
// lib.rs use napi_derive::napi; #[napi] pub async fn hello() -> u32 { 42 }
- Create a loader file:
// loader.mjs import { join } from "node:path"; import { dlopen } from "node:process"; import { fileURLToPath } from "node:url"; const nativeBinding = { exports: {} }; dlopen(nativeBinding, join(fileURLToPath(import.meta.url), "..", `module.linux-x64-gnu.node`)); globalThis.hello = nativeBinding.exports.hello;
- Build & Start REPL:
npm build && node --import ./loader.mjs - Call
hello()
Result
thread '<unnamed>' panicked at /home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/napi-3.2.0/src/tokio_runtime.rs:113:6:
Access tokio runtime failed in spawn
stack backtrace:
0: 0x768fb7f16c1a - std::backtrace_rs::backtrace::libunwind::trace::h88deb10bd0145eb8
at /rustc/4d91de4e48198da2e33413efdcd9cd2cc0c46688/library/std/src/../../backtrace/src/backtrace/libunwind.rs:116:5
1: 0x768fb7f16c1a - std::backtrace_rs::backtrace::trace_unsynchronized::he1036f5481c14dff
at /rustc/4d91de4e48198da2e33413efdcd9cd2cc0c46688/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
2: 0x768fb7f16c1a - std::sys::backtrace::_print_fmt::hecc345b6e70c4b20
at /rustc/4d91de4e48198da2e33413efdcd9cd2cc0c46688/library/std/src/sys/backtrace.rs:66:9
3: 0x768fb7f16c1a - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::he089f96442833f67
at /rustc/4d91de4e48198da2e33413efdcd9cd2cc0c46688/library/std/src/sys/backtrace.rs:39:26
4: 0x768fb7f34803 - core::fmt::rt::Argument::fmt::h1f77cded99c71a14
at /rustc/4d91de4e48198da2e33413efdcd9cd2cc0c46688/library/core/src/fmt/rt.rs:177:76
5: 0x768fb7f34803 - core::fmt::write::h2f210ed4c94745cb
at /rustc/4d91de4e48198da2e33413efdcd9cd2cc0c46688/library/core/src/fmt/mod.rs:1440:21
6: 0x768fb7f14473 - std::io::Write::write_fmt::h7de08171ab770fb2
at /rustc/4d91de4e48198da2e33413efdcd9cd2cc0c46688/library/std/src/io/mod.rs:1887:15
7: 0x768fb7f16a62 - std::sys::backtrace::BacktraceLock::print::h810fbd31421329e6
at /rustc/4d91de4e48198da2e33413efdcd9cd2cc0c46688/library/std/src/sys/backtrace.rs:42:9
8: 0x768fb7f17c00 - std::panicking::default_hook::{{closure}}::hbaad47ed9dc6356d
at /rustc/4d91de4e48198da2e33413efdcd9cd2cc0c46688/library/std/src/panicking.rs:295:22
9: 0x768fb7f179e0 - std::panicking::default_hook::h24e207139139d40a
at /rustc/4d91de4e48198da2e33413efdcd9cd2cc0c46688/library/std/src/panicking.rs:322:9
10: 0x768fb7f18272 - std::panicking::rust_panic_with_hook::ha9131beeb2ddc506
at /rustc/4d91de4e48198da2e33413efdcd9cd2cc0c46688/library/std/src/panicking.rs:828:13
11: 0x768fb7f1810a - std::panicking::begin_panic_handler::{{closure}}::h1bba0eaeb6da506f
at /rustc/4d91de4e48198da2e33413efdcd9cd2cc0c46688/library/std/src/panicking.rs:701:13
12: 0x768fb7f17119 - std::sys::backtrace::__rust_end_short_backtrace::h1d1ca3eade483f4c
at /rustc/4d91de4e48198da2e33413efdcd9cd2cc0c46688/library/std/src/sys/backtrace.rs:168:18
13: 0x768fb7f17d9d - rust_begin_unwind
at /rustc/4d91de4e48198da2e33413efdcd9cd2cc0c46688/library/std/src/panicking.rs:692:5
14: 0x768fb7e6e5b0 - core::panicking::panic_fmt::h896a0727a1a943f9
at /rustc/4d91de4e48198da2e33413efdcd9cd2cc0c46688/library/core/src/panicking.rs:75:14
15: 0x768fb7e6e58b - core::panicking::panic_display::he48e31e939a730f1
at /rustc/4d91de4e48198da2e33413efdcd9cd2cc0c46688/library/core/src/panicking.rs:261:5
16: 0x768fb7e6e58b - core::option::expect_failed::h8c40d2d654ba3611
at /rustc/4d91de4e48198da2e33413efdcd9cd2cc0c46688/library/core/src/option.rs:2024:5
17: 0x768fb7e72112 - core::option::Option<T>::expect::h095772936ac6a98b
at /home/user/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/option.rs:933:21
18: 0x768fb7e855cb - napi::tokio_runtime::spawn::h5d8213034b010342
at /home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/napi-3.2.0/src/tokio_runtime.rs:110:3
19: 0x768fb7e84ada - napi::tokio_runtime::execute_tokio_future::h53947a2a9579e980
at /home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/napi-3.2.0/src/tokio_runtime.rs:257:12
20: 0x768fb7e89aaa - foo::hello_c_callback::{{closure}}::h72b605f92deef390
at /repos/foo/src/lib.rs:3:1
21: 0x768fb7e861a3 - core::result::Result<T,E>::and_then::h7d5772899b08722a
at /home/user/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/result.rs:1353:22
22: 0x768fb7e6f024 - foo::hello_c_callback::h99730f486e375a65
at /repos/foo/src/lib.rs:3:1
23: 0xee9da5 - _ZN6v8impl12_GLOBAL__N_123FunctionCallbackWrapper6InvokeERKN2v820FunctionCallbackInfoINS2_5ValueEEE
24: 0x768fafe0f5e2 - <unknown>
fatal runtime error: failed to initiate panic, error 5
Aborted (core dumped)
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