all: Go 1.21 support

Author: aykevl

.github/workflows/build-macos.yml

@@ -27,7 +27,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v3
         with:
-          go-version: '1.20'
+          go-version: '1.21.0-rc.2'
           cache: true
       - name: Restore LLVM source cache
         uses: actions/cache/restore@v3
@@ -126,7 +126,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v3
         with:
-          go-version: '1.20'
+          go-version: '1.21.0-rc.2'
           cache: true
       - name: Build TinyGo
         run: go install

.github/workflows/linux.yml

@@ -18,7 +18,7 @@ jobs:
     # statically linked binary.
     runs-on: ubuntu-latest
     container:
-      image: golang:1.20-alpine
+      image: golang:1.21rc2-alpine
     steps:
       - name: Install apk dependencies
         # tar: needed for actions/cache@v3
@@ -135,7 +135,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v3
         with:
-          go-version: '1.20'
+          go-version: '1.21.0-rc.2'
           cache: true
       - name: Install wasmtime
         run: |
@@ -177,7 +177,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v3
         with:
-          go-version: '1.20'
+          go-version: '1.21.0-rc.2'
           cache: true
       - name: Install Node.js
         uses: actions/setup-node@v3
@@ -290,7 +290,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v3
         with:
-          go-version: '1.20'
+          go-version: '1.21.0-rc.2'
           cache: true
       - name: Restore LLVM source cache
         uses: actions/cache/restore@v3
@@ -407,7 +407,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v3
         with:
-          go-version: '1.20'
+          go-version: '1.21.0-rc.2'
           cache: true
       - name: Restore LLVM source cache
         uses: actions/cache/restore@v3

.github/workflows/windows.yml

@@ -35,7 +35,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v3
         with:
-          go-version: '1.20'
+          go-version: '1.21.0-rc.2'
           cache: true
       - name: Restore cached LLVM source
         uses: actions/cache/restore@v3
@@ -143,7 +143,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v3
         with:
-          go-version: '1.20'
+          go-version: '1.21.0-rc.2'
           cache: true
       - name: Download TinyGo build
         uses: actions/download-artifact@v2
@@ -173,7 +173,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v3
         with:
-          go-version: '1.20'
+          go-version: '1.21.0-rc.2'
           cache: true
       - name: Download TinyGo build
         uses: actions/download-artifact@v2
@@ -209,7 +209,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v3
         with:
-          go-version: '1.20'
+          go-version: '1.21.0-rc.2'
           cache: true
       - name: Download TinyGo build
         uses: actions/download-artifact@v2

builder/config.go

@@ -27,7 +27,7 @@ func NewConfig(options *compileopts.Options) (*compileopts.Config, error) {
 	if err != nil {
 		return nil, err
 	}
-	if major != 1 || minor < 18 || minor > 20 {
+	if major != 1 || minor < 18 || minor > 21 {
 		// Note: when this gets updated, also update the Go compatibility matrix:
 		// https://github.com/tinygo-org/tinygo-site/blob/dev/content/docs/reference/go-compat-matrix.md
 		return nil, fmt.Errorf("requires go version 1.18 through 1.20, got go%d.%d", major, minor)

compiler/symbol.go

@@ -367,7 +367,7 @@ func (c *compilerContext) parsePragmas(info *functionInfo, f *ssa.Function) {
 // The list of allowed types is based on this proposal:
 // https://github.com/golang/go/issues/59149
 func (c *compilerContext) checkWasmImport(f *ssa.Function, pragma string) {
-	if c.pkg.Path() == "runtime" {
+	if c.pkg.Path() == "runtime" || c.pkg.Path() == "syscall/js" {
 		// The runtime is a special case. Allow all kinds of parameters
 		// (importantly, including pointers).
 		return

src/internal/bytealg/bytealg.go

@@ -251,3 +251,13 @@ func IndexRabinKarp(s, substr string) int {
 	}
 	return -1
 }
+
+// MakeNoZero makes a slice of length and capacity n without zeroing the bytes.
+// It is the caller's responsibility to ensure uninitialized bytes
+// do not leak to the end user.
+func MakeNoZero(n int) []byte {
+	// Note: this does zero the buffer even though that's not necessary.
+	// For performance reasons we might want to change this (similar to the
+	// malloc function implemented in the runtime).
+	return make([]byte, n)
+}

src/runtime/baremetal.go

@@ -38,6 +38,8 @@ func growHeap() bool {
 
 //export malloc
 func libc_malloc(size uintptr) unsafe.Pointer {
+	// Note: this zeroes the returned buffer which is not necessary.
+	// The same goes for bytealg.MakeNoZero.
 	return alloc(size, nil)
 }
 

src/runtime/runtime.go

@@ -100,3 +100,27 @@ func godebug_setUpdate(update func(string, string)) {
 	// variable changes (for example, via os.Setenv).
 	godebugUpdate = update
 }
+
+//go:linkname godebug_setNewIncNonDefault internal/godebug.setNewIncNonDefault
+func godebug_setNewIncNonDefault(newIncNonDefault func(string) func()) {
+	// Dummy function necessary in Go 1.21.
+}
+
+// Write to the given file descriptor.
+// This is called from internal/godebug starting with Go 1.21, and only seems to
+// be called with the stderr file descriptor.
+func write(fd uintptr, p unsafe.Pointer, n int32) int32 {
+	if fd == 2 { // stderr
+		// Convert to a string, because we know that p won't change during the
+		// call to printstring.
+		// TODO: use unsafe.String instead once we require Go 1.20.
+		s := _string{
+			ptr:    (*byte)(p),
+			length: uintptr(n),
+		}
+		str := *(*string)(unsafe.Pointer(&s))
+		printstring(str)
+		return n
+	}
+	return 0
+}

src/runtime/runtime_nintendoswitch.go

@@ -105,7 +105,7 @@ func abort() {
 }
 
 //export write
-func write(fd int32, buf *byte, count int) int {
+func libc_write(fd int32, buf *byte, count int) int {
 	// TODO: Proper handling write
 	for i := 0; i < count; i++ {
 		putchar(*buf)

src/runtime/runtime_wasm_js.go

@@ -44,8 +44,8 @@ func nanosecondsToTicks(ns int64) timeUnit {
 // This function is called by the scheduler.
 // Schedule a call to runtime.scheduler, do not actually sleep.
 //
-//export runtime.sleepTicks
+//go:wasmimport gojs runtime.sleepTicks
 func sleepTicks(d timeUnit)
 
-//export runtime.ticks
+//go:wasmimport gojs runtime.ticks
 func ticks() timeUnit