fix: support TinyGo 0.35.0 (#662)

.github/workflows/ci-sdk-go-build.yml

@@ -73,6 +73,6 @@ jobs:
       - name: Setup TinyGo
         uses: acifani/setup-tinygo@v2
         with:
-          tinygo-version: 0.33.0
+          tinygo-version: 0.35.0
       - name: Build Program
         run: ./build.sh

CHANGELOG.md

@@ -2,11 +2,12 @@
 
 ## UNRELEASED
 
-- test: add tests for AssemblyScript SDK Transform [#659](https://github.com/hypermodeinc/modus/pull/659)
 - chore: lint example test [#656](https://github.com/hypermodeinc/modus/pull/656)
 - fix: unused imports should not be included in metadata [#657](https://github.com/hypermodeinc/modus/pull/657)
+- test: add tests for AssemblyScript SDK Transform [#659](https://github.com/hypermodeinc/modus/pull/659)
 - fix: improve Go version handling [#660](https://github.com/hypermodeinc/modus/pull/660)
 - fix: update runtime wasm tests [#661](https://github.com/hypermodeinc/modus/pull/661)
+- fix: support TinyGo 0.35.0 [#661](https://github.com/hypermodeinc/modus/pull/662)
 
 ## 2024-12-13 - Runtime 0.15.0
 

cspell.json

@@ -22,6 +22,7 @@
     "bedrockruntime",
     "binaryen",
     "buger",
+    "buildmode",
     "cconf",
     "chewxy",
     "classid",

runtime/wasmhost/wasmhost.go

@@ -119,6 +119,7 @@ func (host *wasmHost) GetModuleInstance(ctx context.Context, plugin *plugins.Plu
 	jwtClaims := middleware.GetJWTClaims(ctx)
 	cfg := wazero.NewModuleConfig().
 		WithName("").
+		WithStartFunctions("_initialize", "_start").
 		WithSysWalltime().WithSysNanotime().
 		WithRandSource(rand.Reader).
 		WithStdout(wOut).WithStderr(wErr).

sdk/go/tools/modus-go-build/compiler/compiler.go

@@ -24,10 +24,24 @@ import (
 const minTinyGoVersion = "0.33.0"
 
 func Compile(config *config.Config) error {
+
+	tinygoVersion, err := getCompilerVersion(config)
+	if err != nil {
+		return err
+	}
+
 	args := []string{"build"}
 	args = append(args, "-target", "wasip1")
 	args = append(args, "-o", filepath.Join(config.OutputDir, config.WasmFileName))
 
+	// WASI "reactor mode" (-buildmode=c-shared) is required for TinyGo 0.35.0 and later.
+	// Otherwise, the _start function runs and immediately exits before any function can execute.
+	// This also switches the startup function to _initialize instead of _start, so the Modus runtime
+	// needs to match.
+	if tinygoVersion.GreaterThanOrEqual(version.Must(version.NewVersion("0.35.0"))) {
+		args = append(args, "-buildmode", "c-shared")
+	}
+
 	// disable the asyncify scheduler until we better understand how to use it
 	args = append(args, "-scheduler", "none")