Update wasmtime and add --argv0

Author: zooba

.github/workflows/reusable-wasi.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-24.04
     timeout-minutes: 60
     env:
-      WASMTIME_VERSION: 22.0.0
+      WASMTIME_VERSION: 38.0.3
       WASI_SDK_VERSION: 24
       WASI_SDK_PATH: /opt/wasi-sdk
       CROSS_BUILD_PYTHON: cross-build/build

Tools/wasm/wasi/__main__.py

@@ -329,6 +329,7 @@ def configure_wasi_python(context, working_dir):
         "ENV_VAR_NAME": "PYTHONPATH",
         "ENV_VAR_VALUE": f"/{sysconfig_data_dir}",
         "PYTHON_WASM": working_dir / "python.wasm",
+        "ARGV0": wasi_build_dir / "python.wasm",
     }
     # Check dynamically for wasmtime in case it was specified manually via
     # `--host-runner`.
@@ -421,6 +422,8 @@ def main():
         "--wasm max-wasm-stack=16777216 "
         # Enable thread support; causes use of preview1.
         # "--wasm threads=y --wasi threads=y "
+        # Explicitly set the argv[0] value
+        "--argv0 {ARGV0} "
         # Map the checkout to / to load the stdlib from /Lib.
         "--dir {HOST_DIR}::{GUEST_DIR} "
         # Set PYTHONPATH to the sysconfig data.