preopens question

[yamt]

hi,

i'm trying to use the host command to run adapted preview1 modules. i was able to run simple "hello" style modules.
eg.

wasm-tools component new hello.wasm --adapt wasi_snapshot_preview1.wasm -o chello.wasm
host chello.wasm

however, for a bit more complex modules which involve filesystem operations, i failed to find a way to specify preopens.
(i'm looking for functionality equiv of wasmtime run --dir)

i guess this get-directories thing is related.

preview2-prototyping/wit/preopens.wit

Line 16 in d3bd2bc

get-directories: func() -> list<tuple<descriptor, string>>

any help? thank you.

[pchickey]

I am actually implementing those command line flags right now, sit tight

[yamt]

ok. thank you for the info.

[yamt]

#142 seems working for me. thank you.

spacetanuki% ./target/release/host --mapdir aaa::${HOME}/git/toywasm/wat/wasi ~/git/wasm/wasm-tools/ctoywasm.wasm -- --wasi aaa/hello.wasm
2023-04-17 06:27:46 (1681712866.343301000): set_nonblocking failed with 28
2023-04-17 06:27:46 (1681712866.343353000): set_nonblocking failed with 28
2023-04-17 06:27:46 (1681712866.343362000): set_nonblocking failed with 28
hello
Error: error while executing at wasm backtrace:
    0: 0x6a29a - wit-component:adapter:wasi_snapshot_preview1!wasi_snapshot_preview1::bindings::exit::exit::h581bbd3be0a9ad99
    1: 0x69582 - wit-component:adapter:wasi_snapshot_preview1!proc_exit
    2: 0x6e095 - wit-component:shim!adapt-wasi_snapshot_preview1-proc_exit
    3: 0x842d - <unknown>!__wasi_proc_exit
    4: 0x800b - <unknown>!_Exit
    5: 0x9a13 - <unknown>!exit
    6: 0x205c - <unknown>!main
    7: 0x8084 - <unknown>!__main_void
    8: 0x1cbf - <unknown>!_start
    9: 0x6b601 - wit-component:adapter:wasi_snapshot_preview1!main

Caused by:
    Exited with i32 exit status 0
spacetanuki% 

[pchickey]

I should also make it so that an exit 0 doesnt show the backtrace!

[yamt]

I should also make it so that an exit 0 doesnt show the backtrace!

probably it shouldn't show the backtrace for proc_exit at all.

[pchickey]

correct. coffee hasnt kicked in yet