Stream: general

Topic: Integrate two apps into wasmtime

view this post on Zulip celine santosh (Jul 22 2024 at 13:57):

Hi

I was trying to integrate two apps one simple rust program, which prints a line and another go program which prints a line. I am trying to integrate the two apps into wasmtime and here is my main.rs file which is located in src folder

use anyhow::Result;
use wasi_cap_std_sync::WasiCtxBuilder;
use wasmtime::*;

fn main() -> Result<()> {
    // Define the WASI functions globally on the `Config`.
    let engine = Engine::default();
    let mut linker = Linker::new(&engine);
    wasmtime_wasi::add_to_linker(&mut linker, |s| s)?;

    // Create a WASI context and put it in a Store; all instances in the store
    // share this context. `WasiCtxBuilder` provides a number of ways to
    // configure what the target program will have access to.
    let wasi = WasiCtxBuilder::new()
        .inherit_stdio()
        .inherit_args()?
        .build();
    let mut store = Store::new(&engine, wasi);

    // Load our WebAssembly modules.
    let module_rust_app = Module::from_file(&engine, "/Users/celinesantosh/Desktop/sem_5/rust_app/target/wasm32-wasi/release/rust_app.wasm")?;
    let module_go_app = Module::from_file(&engine, "/Users/celinesantosh/Desktop/sem_5/go_program/go_app.wasm")?;

    // Instantiate the Rust app module.
    let instance_rust_app = linker.instantiate(&mut store, &module_rust_app)?;
    // Instantiate the Go app module.
    let instance_go_app = linker.instantiate(&mut store, &module_go_app)?;

    // Get the `_start` function from the Rust app instance.
    let start_rust_app = instance_rust_app.get_typed_func::<(), ()>(&mut store, "_start")?;
    // Get the `_start` function from the Go app instance.
    let start_go_app = instance_go_app.get_typed_func::<(), ()>(&mut store, "_start")?;

    // Call the `_start` function on both modules.
    start_rust_app.call(&mut store, ())?;
    start_go_app.call(&mut store, ())?;

    Ok(())
}

But I am getting an issue while building

error: failed to run custom build command for cranelift-codegen v0.111.0 (/Users/celinesantosh/Desktop/sem_5/wasmtime_dev/cranelift/codegen)

Caused by:

process didn't exit successfully: /Users/celinesantosh/Desktop/sem_5/wasmtime_dev/target/release/build/cranelift-codegen-4791549fd0e2d9a3/build-script-build (exit status: 101)

--- stderr

thread 'main' panicked at cranelift/codegen/build.rs:50:53:

error when identifying target: "no supported isa found for arch wasm32"

note: run with RUST_BACKTRACE=1 environment variable to display a backtrace
warning: build failed, waiting for other jobs to finish...

The following warnings were emitted during compilation:
warning: zstd-sys@2.0.9+zstd.1.5.5: error: unable to create target: 'No available targets are compatible with triple "wasm32-unknown-wasi"'
warning: zstd-sys@2.0.9+zstd.1.5.5: 1 error generated.
warning: zstd-sys@2.0.9+zstd.1.5.5: ToolExecError: Command "clang" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "--target=wasm32-wasi" "-I" "wasm-shim/" "-I" "zstd/lib/" "-I" "zstd/lib/common" "-fvisibility=hidden" "-DXXH_STATIC_ASSERT=0" "-DZSTD_LIB_DEPRECATED=0" "-DXXH_PRIVATE_API=" "-DZSTDLIB_VISIBILITY=" "-DZSTDERRORLIB_VISIBILITY=" "-o" "/Users/celinesantosh/Desktop/sem_5/wasmtime_dev/target/wasm32-wasi/release/build/zstd-sys-83613bc565f26643/out/zstd/lib/common/debug.o" "-c" "zstd/lib/common/debug.c" with args "clang" did not execute successfully (status code exit status: 1).running: "clang" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "--target=wasm32-wasi" "-I" "wasm-shim/" "-I" "zstd/lib/" "-I" "zstd/lib/common" "-fvisibility=hidden" "-DXXH_STATIC_ASSERT=0" "-DZSTD_LIB_DEPRECATED=0" "-DXXH_PRIVATE_API=" "-DZSTDLIB_VISIBILITY=" "-DZSTDERRORLIB_VISIBILITY=" "-o" "/Users/celinesantosh/Desktop/sem_5/wasmtime_dev/target/wasm32-wasi/release/build/zstd-sys-83613bc565f26643/out/zstd/lib/common/entropy_common.o" "-c" "zstd/lib/common/entropy_common.c"
warning: zstd-sys@2.0.9+zstd.1.5.5: error: unable to create target: 'No available targets are compatible with triple "wasm32-unknown-wasi"'
warning: zstd-sys@2.0.9+zstd.1.5.5: 1 error generated.
warning: zstd-sys@2.0.9+zstd.1.5.5: error: unable to create target: 'No available targets are compatible with triple "wasm32-unknown-wasi"'
warning: zstd-sys@2.0.9+zstd.1.5.5: 1 error generated.
warning: zstd-sys@2.0.9+zstd.1.5.5: ToolExecError: Command "clang" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "--target=wasm32-wasi" "-I" "wasm-shim/" "-I" "zstd/lib/" "-I" "zstd/lib/common" "-fvisibility=hidden" "-DXXH_STATIC_ASSERT=0" "-DZSTD_LIB_DEPRECATED=0" "-DXXH_PRIVATE_API=" "-DZSTDLIB_VISIBILITY=" "-DZSTDERRORLIB_VISIBILITY=" "-o" "/Users/celinesantosh/Desktop/sem_5/wasmtime_dev/target/wasm32-wasi/release/build/zstd-sys-83613bc565f26643/out/zstd/lib/common/entropy_common.o" "-c" "zstd/lib/common/entropy_common.c" with args "clang" did not execute successfully (status code exit status: 1).

Any help would be appreciated

Thanks

view this post on Zulip Lann Martin (Jul 22 2024 at 14:16):

It looks like you have the target set to wasm32 for your host program, not just your guest programs. This could be either passed as e.g. cargo build --target wasm32-wasi or set by a config file e.g. .cargo/config.toml.

view this post on Zulip celine santosh (Jul 22 2024 at 20:35):

Thanks .

Now I can build successfully, but while running I am getting an error
(base) celinesantosh@celines-MacBook-Air-2 celine_app % cargo run

Compiling celine_app v0.1.0 (/Users/celinesantosh/Desktop/sem_5/wasmtime_dev/examples/celine_app)

Finished dev profile [unoptimized + debuginfo] target(s) in 2.94s

Running /Users/celinesantosh/Desktop/sem_5/wasmtime_dev/target/debug/celine_app

Error: unknown import: gojs::runtime.scheduleTimeoutEvent has not been defined

view this post on Zulip celine santosh (Jul 22 2024 at 21:22):

Thanks .. I have solved it now

Last updated: Nov 22 2024 at 16:03 UTC