Stream: git-wasmtime

Topic: wasmtime / issue #4458 I tried to execute wasm but fail w...

view this post on Zulip Wasmtime GitHub notifications bot (Jul 16 2022 at 03:19):

abc767234318 opened issue #4458:

Test Case

demo.zip
This is a wasm file first mentioned in wasmer issues NO.936.

Steps to Reproduce

wasmtime --dir=. demo.wasm '{"a":"txt", "b":1}'

Expected Results

Successfully execute the test.wasm and print :

The program accepts a JSON input via stdin
[Usage]: wasmer run --dir=. main.wasm '{"a":"txt", "b":2}'
The input is unmarshaled and saved to a file log.txt
----------------------------------------
Got input = {"a":"txt", "b":1}
File log.txt updated

Actual Results

Error: failed to run main module `demo.wasm`

Caused by:
    0: failed to instantiate "demo.wasm"
    1: command export '__rustc_debug_gdb_scripts_section__' is not a function

Versions and Environment

Wasmtime version or commit: wasmtime-cli 0.38.1

Operating system: ubuntu20.04

view this post on Zulip Wasmtime GitHub notifications bot (Jul 16 2022 at 03:19):

abc767234318 labeled issue #4458:

Test Case

demo.zip
This is a wasm file first mentioned in wasmer issues NO.936.

Steps to Reproduce

wasmtime --dir=. demo.wasm '{"a":"txt", "b":1}'

Expected Results

Successfully execute the test.wasm and print :

The program accepts a JSON input via stdin
[Usage]: wasmer run --dir=. main.wasm '{"a":"txt", "b":2}'
The input is unmarshaled and saved to a file log.txt
----------------------------------------
Got input = {"a":"txt", "b":1}
File log.txt updated

Actual Results

Error: failed to run main module `demo.wasm`

Caused by:
    0: failed to instantiate "demo.wasm"
    1: command export '__rustc_debug_gdb_scripts_section__' is not a function

Versions and Environment

Wasmtime version or commit: wasmtime-cli 0.38.1

Operating system: ubuntu20.04

view this post on Zulip Wasmtime GitHub notifications bot (Jul 16 2022 at 03:29):

abc767234318 edited issue #4458:

Test Case

demo.zip
This is a wasm file first mentioned in wasmer issues NO.936.

Steps to Reproduce

touch log.txt
wasmtime --dir=. demo.wasm '{"a":"txt", "b":1}'

Expected Results

Successfully execute the test.wasm and print :

The program accepts a JSON input via stdin
[Usage]: wasmer run --dir=. main.wasm '{"a":"txt", "b":2}'
The input is unmarshaled and saved to a file log.txt
----------------------------------------
Got input = {"a":"txt", "b":1}
File log.txt updated

Actual Results

Error: failed to run main module `demo.wasm`

Caused by:
    0: failed to instantiate "demo.wasm"
    1: command export '__rustc_debug_gdb_scripts_section__' is not a function

Versions and Environment

Wasmtime version or commit: wasmtime-cli 0.38.1

Operating system: ubuntu20.04

view this post on Zulip Wasmtime GitHub notifications bot (Jul 30 2022 at 12:16):

rostamn739 commented on issue #4458:

This is a more detailed run with --allow-unknown-exports

✗ cargo run -- run --allow-precompiled --allow-unknown-exports ./demo.cwasm
     Running `target/debug/wasmtime run --allow-precompiled --allow-unknown-exports ./demo.cwasm`
The program accepts a JSON input via stdin
[Usage]: wasmer run --dir=. main.wasm '{"a":"txt", "b":2}'
The input is unmarshaled and saved to a file log.txt
----------------------------------------
Got input = {"a":"txt","b": 123}
thread 'main' panicked at 'cannot open file: Custom { kind: Other, error: "failed to find a preopened file descriptor through which \"log.txt\" could be opened" }', src/libcore/result.rs:1084:5
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace.
Error: failed to run main module `./demo.cwasm`

Caused by:
    0: failed to invoke command default
    1: wasm trap: wasm `unreachable` instruction executed
       wasm backtrace:
           0: 0x3adc6 - <unknown>!__rust_start_panic
           1: 0x3a5ef - <unknown>!rust_panic
           2: 0x3a2b4 - <unknown>!std::panicking::rust_panic_with_hook::h38e55c6f9a9b5d9f
           3: 0x3a087 - <unknown>!std::panicking::continue_panic_fmt::hbdab1a44e1ebdad7
           4: 0x39fe6 - <unknown>!rust_begin_unwind
           5: 0x43303 - <unknown>!core::panicking::panic_fmt::h7e9f94035af782b3
           6: 0x4508f - <unknown>!core::result::unwrap_failed::hf7591c1dd9412006
           7: 0x7e6c - <unknown>!core::result::Result<T,E>::expect::h4b0ac66bb9239b5e
           8: 0x17ca - <unknown>!demo::main::hd0c421d0ef0fb50e
           9: 0x1ae5 - <unknown>!std::rt::lang_start::{{closure}}::h298634c7c1655c18
          10: 0x39966 - <unknown>!std::sys_common::backtrace::__rust_begin_short_backtrace::hf3ea6316715e2a72
          11: 0x39fd8 - <unknown>!std::panicking::try::do_call::h2cc3188b185bea03
          12: 0x3adba - <unknown>!__rust_maybe_catch_panic
          13: 0x3a73c - <unknown>!std::rt::lang_start_internal::h5c7c5a5aac4d00f7
          14: 0x1a90 - <unknown>!std::rt::lang_start::hbe7627577ab85542
          15: 0x1a10 - <unknown>!main
          16:  0x9f5 - <unknown>!_start
       note: using the `WASMTIME_BACKTRACE_DETAILS=1` environment variable to may show more debugging information

view this post on Zulip Wasmtime GitHub notifications bot (Aug 09 2022 at 17:14):

jameysharp commented on issue #4458:

According to #2294, newer versions of Rust shouldn't emit the __rustc_debug_gdb_scripts_section__ symbol any more. Based on #511, it sounds like 1.50 is new enough, which is over a year old. It looks like this was built with Rust 1.38, which is almost three years old.

I don't know enough about either Rust's WASI target or wasmtime's WASI implementation, but I'm wondering if recompiling with newer Rust would fix both of these issues.

@sunfishcode, does this sound familiar to you?

view this post on Zulip Wasmtime GitHub notifications bot (Aug 09 2022 at 17:42):

sunfishcode commented on issue #4458:

I don't know recognize __rustc_debug_gdb_scripts_section__ myself, but that sounds plausible.

view this post on Zulip Wasmtime GitHub notifications bot (Aug 09 2022 at 17:42):

sunfishcode edited a comment on issue #4458:

I don't recognize __rustc_debug_gdb_scripts_section__ myself, but that sounds plausible.

view this post on Zulip Wasmtime GitHub notifications bot (Aug 09 2022 at 21:16):

sunfishcode commented on issue #4458:

I don't know what toolchain produces the error message "failed to find a preopened file descriptor through which \"log.txt\" could be opened", so it's not clear to me what the problem is, without a significant amount of debugging.

This binary uses the old "wasi_unstable" module. It would be valuable to recompile it and see if the error persists.

view this post on Zulip Wasmtime GitHub notifications bot (Dec 02 2022 at 00:07):

alexcrichton commented on issue #4458:

I'm going to close this since I believe Wasmtime is working as intended, requiring the --allow-unknown-exports flag. The subsequent error message seems related to the specific wasm module here and possibly a missing --dir . option. I don't think there's anything left to fix per se here, so I'm going to close this.

view this post on Zulip Wasmtime GitHub notifications bot (Dec 02 2022 at 00:07):

alexcrichton closed issue #4458:

Test Case

demo.zip
This is a wasm file first mentioned in wasmer issues NO.936.

Steps to Reproduce

touch log.txt
wasmtime --dir=. demo.wasm '{"a":"txt", "b":1}'

Expected Results

Successfully execute the test.wasm and print :

The program accepts a JSON input via stdin
[Usage]: wasmer run --dir=. main.wasm '{"a":"txt", "b":2}'
The input is unmarshaled and saved to a file log.txt
----------------------------------------
Got input = {"a":"txt", "b":1}
File log.txt updated

Actual Results

Error: failed to run main module `demo.wasm`

Caused by:
    0: failed to instantiate "demo.wasm"
    1: command export '__rustc_debug_gdb_scripts_section__' is not a function

Versions and Environment

Wasmtime version or commit: wasmtime-cli 0.38.1

Operating system: ubuntu20.04

Last updated: Dec 23 2024 at 12:05 UTC