testing: switch to upstream version

2026-07-27 07:08:42 +00:00 · 2025-10-05 15:33:49 +02:00
51 changed files with 131 additions and 2745 deletions
@@ -39,7 +39,7 @@ jobs:
      - name: Install Go
        uses: actions/setup-go@v6
        with:
-          go-version: '1.25.4'
+          go-version: '1.25.1'
          cache: true
      - name: Restore LLVM source cache
        uses: actions/cache/restore@v4
@@ -96,7 +96,7 @@ jobs:
      - name: Build TinyGo release tarball
        run: make release -j3
      - name: Test stdlib packages
-        run: make tinygo-test TEST_ADDITIONAL_FLAGS="-scheduler=tasks"
+        run: make tinygo-test
      - name: Make release artifact
        run: cp -p build/release.tar.gz build/tinygo${{ steps.version.outputs.version }}.darwin-${{ matrix.goarch }}.tar.gz
      - name: Publish release artifact
@@ -134,7 +134,7 @@ jobs:
      - name: Install Go
        uses: actions/setup-go@v6
        with:
-          go-version: '1.25.4'
+          go-version: '1.25.1'
          cache: true
      - name: Build TinyGo (LLVM ${{ matrix.version }})
        run: go install -tags=llvm${{ matrix.version }}
@@ -31,7 +31,7 @@ jobs:
          sudo rm -rf /usr/local/share/boost
          df -h
      - name: Check out the repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
        with:
          submodules: recursive
      - name: Set up Docker Buildx
@@ -58,7 +58,7 @@ jobs:
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - name: Build and push
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v5
        with:
          context: .
          push: true
@@ -16,15 +16,7 @@ jobs:
    # Build Linux binaries, ready for release.
    # This runs inside an Alpine Linux container so we can more easily create a
    # statically linked binary.
-    strategy:
-      matrix:
-        goarch: [ amd64, arm64 ]
-        include:
-          - goarch: amd64
-            os: ubuntu-latest
-          - goarch: arm64
-            os: ubuntu-24.04-arm # TODO: use a -latest variant?
-    runs-on: ${{ matrix.os }}
+    runs-on: ubuntu-latest
    container:
      image: golang:1.25-alpine
    outputs:
@@ -39,7 +31,7 @@ jobs:
        # We're not on a multi-user machine, so this is safe.
        run: git config --global --add safe.directory "$GITHUB_WORKSPACE"
      - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
        with:
          submodules: true
      - name: Extract TinyGo version
@@ -48,7 +40,7 @@ jobs:
      - name: Cache Go
        uses: actions/cache@v4
        with:
-          key: go-cache-linux-alpine-${{ matrix.goarch }}-v1-${{ hashFiles('go.mod') }}
+          key: go-cache-linux-alpine-v1-${{ hashFiles('go.mod') }}
          path: |
            ~/.cache/go-build
            ~/go/pkg/mod
@@ -81,7 +73,7 @@ jobs:
        uses: actions/cache/restore@v4
        id: cache-llvm-build
        with:
-          key: llvm-build-19-linux-alpine-${{ matrix.goarch }}-v1
+          key: llvm-build-20-linux-alpine-v1
          path: llvm-build
      - name: Build LLVM
        if: steps.cache-llvm-build.outputs.cache-hit != 'true'
@@ -105,7 +97,7 @@ jobs:
        uses: actions/cache@v4
        id: cache-binaryen
        with:
-          key: binaryen-linux-alpine-${{ matrix.goarch }}-v1
+          key: binaryen-linux-alpine-v1
          path: build/wasm-opt
      - name: Build Binaryen
        if: steps.cache-binaryen.outputs.cache-hit != 'true'
@@ -124,28 +116,28 @@ jobs:
      - name: Build TinyGo release
        run: |
          make release deb -j3 STATIC=1
-          cp -p build/release.tar.gz /tmp/tinygo${{ steps.version.outputs.version }}.linux-${{ matrix.goarch }}.tar.gz
-          cp -p build/release.deb    /tmp/tinygo_${{ steps.version.outputs.version }}_${{ matrix.goarch }}.deb
+          cp -p build/release.tar.gz /tmp/tinygo${{ steps.version.outputs.version }}.linux-amd64.tar.gz
+          cp -p build/release.deb    /tmp/tinygo_${{ steps.version.outputs.version }}_amd64.deb
      - name: Publish release artifact
        uses: actions/upload-artifact@v4
        with:
-          name: linux-${{ matrix.goarch }}-double-zipped-${{ steps.version.outputs.version }}
+          name: linux-amd64-double-zipped-${{ steps.version.outputs.version }}
          path: |
-            /tmp/tinygo${{ steps.version.outputs.version }}.linux-${{ matrix.goarch }}.tar.gz
-            /tmp/tinygo_${{ steps.version.outputs.version }}-${{ matrix.goarch }}.deb
+            /tmp/tinygo${{ steps.version.outputs.version }}.linux-amd64.tar.gz
+            /tmp/tinygo_${{ steps.version.outputs.version }}_amd64.deb
  test-linux-build:
    # Test the binaries built in the build-linux job by running the smoke tests.
    runs-on: ubuntu-latest
    needs: build-linux
    steps:
      - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
        with:
          submodules: true
      - name: Install Go
-        uses: actions/setup-go@v6
+        uses: actions/setup-go@v5
        with:
-          go-version: '1.25.4'
+          go-version: '1.25.0'
          cache: true
      - name: Install wasmtime
        uses: bytecodealliance/actions/wasmtime/setup@v1
@@ -172,7 +164,7 @@ jobs:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
        with:
          submodules: true
      - name: Install apt dependencies
@@ -187,9 +179,9 @@ jobs:
              simavr \
              ninja-build
      - name: Install Go
-        uses: actions/setup-go@v6
+        uses: actions/setup-go@v5
        with:
-          go-version: '1.25.4'
+          go-version: '1.25.0'
          cache: true
      - name: Install Node.js
        uses: actions/setup-node@v4
@@ -280,8 +272,11 @@ jobs:
    # part of the release tarball.
    strategy:
      matrix:
-        goarch: [ arm ]
+        goarch: [ arm, arm64 ]
        include:
+          - goarch: arm64
+            toolchain: aarch64-linux-gnu
+            libc: arm64
          - goarch: arm
            toolchain: arm-linux-gnueabihf
            libc: armhf
@@ -289,7 +284,7 @@ jobs:
    needs: build-linux
    steps:
      - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
      - name: Get TinyGo version
        id: version
        run: ./.github/workflows/tinygo-extract-version.sh | tee -a "$GITHUB_OUTPUT"
@@ -301,9 +296,9 @@ jobs:
              g++-${{ matrix.toolchain }} \
              libc6-dev-${{ matrix.libc }}-cross
      - name: Install Go
-        uses: actions/setup-go@v6
+        uses: actions/setup-go@v5
        with:
-          go-version: '1.25.4'
+          go-version: '1.25.0'
          cache: true
      - name: Restore LLVM source cache
        uses: actions/cache/restore@v4
@@ -25,7 +25,7 @@ jobs:
      contents: read
    steps:
      - name: Check out the repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
        with:
          submodules: recursive
      - name: Set up Docker Buildx
@@ -52,7 +52,7 @@ jobs:
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - name: Build and push
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v5
        with:
          target: tinygo-llvm-build
          context: .
@@ -21,7 +21,7 @@ jobs:
        # See: https://github.com/tinygo-org/tinygo/pull/4516#issuecomment-2416363668
        run: sudo apt-get remove llvm-18
      - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
      - name: Pull musl, bdwgc
        run: |
            git submodule update --init lib/musl lib/bdwgc
@@ -20,7 +20,7 @@ jobs:
        run: |
          echo "$HOME/go/bin" >> $GITHUB_PATH
      - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
        with:
          fetch-depth: 0 # fetch all history (no sparse checkout)
          submodules: true
@@ -31,7 +31,7 @@ jobs:
        run: |
          scoop install ninja binaryen
      - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
        with:
          submodules: true
      - name: Extract TinyGo version
@@ -39,9 +39,9 @@ jobs:
        shell: bash
        run: ./.github/workflows/tinygo-extract-version.sh | tee -a "$GITHUB_OUTPUT"
      - name: Install Go
-        uses: actions/setup-go@v6
+        uses: actions/setup-go@v5
        with:
-          go-version: '1.25.4'
+          go-version: '1.25.0'
          cache: true
      - name: Restore cached LLVM source
        uses: actions/cache/restore@v4
@@ -143,11 +143,11 @@ jobs:
        run: |
          scoop install binaryen
      - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
      - name: Install Go
-        uses: actions/setup-go@v6
+        uses: actions/setup-go@v5
        with:
-          go-version: '1.25.4'
+          go-version: '1.25.0'
          cache: true
      - name: Download TinyGo build
        uses: actions/download-artifact@v4
@@ -173,11 +173,11 @@ jobs:
          maximum-size: 24GB
          disk-root: "C:"
      - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
      - name: Install Go
-        uses: actions/setup-go@v6
+        uses: actions/setup-go@v5
        with:
-          go-version: '1.25.4'
+          go-version: '1.25.0'
          cache: true
      - name: Download TinyGo build
        uses: actions/download-artifact@v4
@@ -209,11 +209,11 @@ jobs:
        run: |
          scoop install binaryen && scoop install wasmtime@29.0.1
      - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
      - name: Install Go
-        uses: actions/setup-go@v6
+        uses: actions/setup-go@v5
        with:
-          go-version: '1.25.4'
+          go-version: '1.25.0'
          cache: true
      - name: Download TinyGo build
        uses: actions/download-artifact@v4
@@ -363,7 +363,6 @@ TEST_PACKAGES_FAST = \
 	path \
 	reflect \
 	sync \
-	testing \
 	testing/iotest \
 	text/scanner \
 	unicode \
@@ -480,8 +479,7 @@ TEST_PACKAGES_HOST := $(TEST_PACKAGES_FAST) $(TEST_PACKAGES_WINDOWS)
 TEST_IOFS := false
 endif

-TEST_SKIP_FLAG := -skip='TestExtraMethods|TestParseAndBytesRoundTrip/P256/Generic'
-TEST_ADDITIONAL_FLAGS ?=
+TEST_SKIP_FLAG := -skip='TestExtraMethods|TestParseAndBytesRoundTrip/P256/Generic|^Fuzz'

 # Test known-working standard library packages.
 # TODO: parallelize, and only show failing tests (no implied -v flag).
@@ -489,7 +487,7 @@ TEST_ADDITIONAL_FLAGS ?=
 tinygo-test:
 	@# TestExtraMethods: used by many crypto packages and uses reflect.Type.Method which is not implemented.
 	@# TestParseAndBytesRoundTrip/P256/Generic: relies on t.Skip() which is not implemented
-	$(TINYGO) test $(TEST_ADDITIONAL_FLAGS) $(TEST_SKIP_FLAG) $(TEST_PACKAGES_HOST) $(TEST_PACKAGES_SLOW)
+	$(TINYGO) test $(TEST_SKIP_FLAG) $(TEST_PACKAGES_HOST) $(TEST_PACKAGES_SLOW)
 	@# io/fs requires os.ReadDir, not yet supported on windows or wasi. It also
 	@# requires a large stack-size. Hence, io/fs is only run conditionally.
 	@# For more details, see the comments on issue #3143.
@@ -622,8 +620,6 @@ smoketest: testchdir
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=feather-rp2040      examples/device-id
 	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=pico2-ice           examples/blinky1
-	@$(MD5SUM) test.hex
 	# test simulated boards on play.tinygo.org
 ifneq ($(WASM), 0)
 	GOOS=js GOARCH=wasm $(TINYGO) build -size short -o test.wasm -tags=arduino              examples/blinky1
@@ -33,13 +33,10 @@ func NewConfig(options *compileopts.Options) (*compileopts.Config, error) {
 	if err != nil {
 		return nil, err
 	}
-
-	if options.GoCompatibility {
-		if gorootMajor != 1 || gorootMinor < minorMin || gorootMinor > minorMax {
-			// 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.%d through 1.%d, got go%d.%d", minorMin, minorMax, gorootMajor, gorootMinor)
-		}
+	if gorootMajor != 1 || gorootMinor < minorMin || gorootMinor > minorMax {
+		// 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.%d through 1.%d, got go%d.%d", minorMin, minorMax, gorootMajor, gorootMinor)
 	}

 	// Check that the Go toolchain version isn't too new, if we haven't been
@@ -43,8 +43,8 @@ func TestBinarySize(t *testing.T) {
 	tests := []sizeTest{
 		// microcontrollers
 		{"hifive1b", "examples/echo", 3884, 280, 0, 2268},
-		{"microbit", "examples/serial", 2844, 360, 8, 2272},
-		{"wioterminal", "examples/pininterrupt", 7349, 1491, 116, 6912},
+		{"microbit", "examples/serial", 2852, 360, 8, 2272},
+		{"wioterminal", "examples/pininterrupt", 7337, 1491, 116, 6912},

 		// TODO: also check wasm. Right now this is difficult, because
 		// wasm binaries are run through wasm-opt and therefore the
@@ -226,7 +226,7 @@ func (c *Config) StackSize() uint64 {

 // MaxStackAlloc returns the size of the maximum allocation to put on the stack vs heap.
 func (c *Config) MaxStackAlloc() uint64 {
-	if c.StackSize() >= 16*1024 {
+	if c.StackSize() > 32*1024 {
 		return 1024
 	}

@@ -59,7 +59,6 @@ type Options struct {
 	WITPackage      string // pass through to wasm-tools component embed invocation
 	WITWorld        string // pass through to wasm-tools component embed -w option
 	ExtLDFlags      []string
-	GoCompatibility bool // enable to check for Go version compatibility
 }

 // Verify performs a validation on the given options, raising an error if options are not valid.
@@ -32,9 +32,6 @@ const (
 	// Whether this is a full or partial Go parameter (int, slice, etc).
 	// The extra context parameter is not a Go parameter.
 	paramIsGoParam = 1 << iota
-
-	// Whether this is a readonly parameter (for example, a string pointer).
-	paramIsReadonly
 )

 // createRuntimeCallCommon creates a runtime call. Use createRuntimeCall or
@@ -170,7 +167,6 @@ func (c *compilerContext) flattenAggregateType(t llvm.Type, name string, goType
 				continue
 			}
 			suffix := strconv.Itoa(i)
-			isString := false
 			if goType != nil {
 				// Try to come up with a good suffix for this struct field,
 				// depending on which Go type it's based on.
@@ -187,16 +183,12 @@ func (c *compilerContext) flattenAggregateType(t llvm.Type, name string, goType
 						suffix = []string{"r", "i"}[i]
 					case types.String:
 						suffix = []string{"data", "len"}[i]
-						isString = true
 					}
 				case *types.Signature:
 					suffix = []string{"context", "funcptr"}[i]
 				}
 			}
 			subInfos := c.flattenAggregateType(subfield, name+"."+suffix, extractSubfield(goType, i))
-			if isString {
-				subInfos[0].flags |= paramIsReadonly
-			}
 			paramInfos = append(paramInfos, subInfos...)
 		}
 		return paramInfos
@@ -250,9 +250,6 @@ func (b *builder) createMapIteratorNext(rangeVal ssa.Value, llvmRangeVal, it llv
 func hashmapIsBinaryKey(keyType types.Type) bool {
 	switch keyType := keyType.Underlying().(type) {
 	case *types.Basic:
-		// TODO: unsafe.Pointer is also a binary key, but to support that we
-		// need to fix an issue with interp first (see
-		// https://github.com/tinygo-org/tinygo/pull/4898).
 		return keyType.Info()&(types.IsBoolean|types.IsInteger) != 0
 	case *types.Pointer:
 		return true
@@ -142,11 +142,6 @@ func (c *compilerContext) getFunction(fn *ssa.Function) (llvm.Type, llvm.Value)
 			nocapture := c.ctx.CreateEnumAttribute(llvm.AttributeKindID("nocapture"), 0)
 			llvmFn.AddAttributeAtIndex(i+1, nocapture)
 		}
-		if paramInfo.flags&paramIsReadonly != 0 && paramInfo.llvmType.TypeKind() == llvm.PointerTypeKind {
-			// Readonly pointer parameters (like strings) benefit from being marked as readonly.
-			readonly := c.ctx.CreateEnumAttribute(llvm.AttributeKindID("readonly"), 0)
-			llvmFn.AddAttributeAtIndex(i+1, readonly)
-		}
 	}

 	// Set a number of function or parameter attributes, depending on the
@@ -74,14 +74,6 @@ func (b *builder) createRawSyscall(call *ssa.CallCommon) (llvm.Value, error) {
 		return b.CreateCall(fnType, target, args, ""), nil

 	case b.GOARCH == "arm" && b.GOOS == "linux":
-		if arch := b.archFamily(); arch != "arm" {
-			// Some targets pretend to be linux/arm for compatibility but aren't
-			// actually such a system. Make sure we emit an error instead of
-			// creating inline assembly that will fail to compile.
-			// See: https://github.com/tinygo-org/tinygo/issues/4959
-			return llvm.Value{}, b.makeError(call.Pos(), "system calls are not supported: target emulates a linux/arm system on "+arch)
-		}
-
 		// Implement the EABI system call convention for Linux.
 		// Source: syscall(2) man page.
 		args := []llvm.Value{}
@@ -50,7 +50,7 @@ unsafe.String.throw:                              ; preds = %entry
 declare void @runtime.unsafeSlicePanic(ptr) #1

 ; Function Attrs: nounwind
-define hidden ptr @main.unsafeStringData(ptr readonly %s.data, i32 %s.len, ptr %context) unnamed_addr #2 {
+define hidden ptr @main.unsafeStringData(ptr %s.data, i32 %s.len, ptr %context) unnamed_addr #2 {
 entry:
  %stackalloc = alloca i8, align 1
  call void @runtime.trackPointer(ptr %s.data, ptr nonnull %stackalloc, ptr undef) #3
@@ -77,7 +77,7 @@ entry:
 }

 ; Function Attrs: nounwind
-define hidden %runtime._string @main.minString(ptr readonly %a.data, i32 %a.len, ptr readonly %b.data, i32 %b.len, ptr %context) unnamed_addr #2 {
+define hidden %runtime._string @main.minString(ptr %a.data, i32 %a.len, ptr %b.data, i32 %b.len, ptr %context) unnamed_addr #2 {
 entry:
  %0 = insertvalue %runtime._string zeroinitializer, ptr %a.data, 0
  %1 = insertvalue %runtime._string %0, i32 %a.len, 1
@@ -91,7 +91,7 @@ entry:
  ret %runtime._string %5
 }

-declare i1 @runtime.stringLess(ptr readonly, i32, ptr readonly, i32, ptr) #1
+declare i1 @runtime.stringLess(ptr, i32, ptr, i32, ptr) #1

 ; Function Attrs: nounwind
 define hidden i32 @main.maxInt(i32 %a, i32 %b, ptr %context) unnamed_addr #2 {
@@ -116,7 +116,7 @@ entry:
 }

 ; Function Attrs: nounwind
-define hidden %runtime._string @main.maxString(ptr readonly %a.data, i32 %a.len, ptr readonly %b.data, i32 %b.len, ptr %context) unnamed_addr #2 {
+define hidden %runtime._string @main.maxString(ptr %a.data, i32 %a.len, ptr %b.data, i32 %b.len, ptr %context) unnamed_addr #2 {
 entry:
  %0 = insertvalue %runtime._string zeroinitializer, ptr %a.data, 0
  %1 = insertvalue %runtime._string %0, i32 %a.len, 1
@@ -31,13 +31,13 @@ entry:
 }

 ; Function Attrs: nounwind
-define hidden i32 @main.stringLen(ptr readonly %s.data, i32 %s.len, ptr %context) unnamed_addr #2 {
+define hidden i32 @main.stringLen(ptr %s.data, i32 %s.len, ptr %context) unnamed_addr #2 {
 entry:
  ret i32 %s.len
 }

 ; Function Attrs: nounwind
-define hidden i8 @main.stringIndex(ptr readonly %s.data, i32 %s.len, i32 %index, ptr %context) unnamed_addr #2 {
+define hidden i8 @main.stringIndex(ptr %s.data, i32 %s.len, i32 %index, ptr %context) unnamed_addr #2 {
 entry:
  %.not = icmp ult i32 %index, %s.len
  br i1 %.not, label %lookup.next, label %lookup.throw
@@ -55,16 +55,16 @@ lookup.throw:                                     ; preds = %entry
 declare void @runtime.lookupPanic(ptr) #1

 ; Function Attrs: nounwind
-define hidden i1 @main.stringCompareEqual(ptr readonly %s1.data, i32 %s1.len, ptr readonly %s2.data, i32 %s2.len, ptr %context) unnamed_addr #2 {
+define hidden i1 @main.stringCompareEqual(ptr %s1.data, i32 %s1.len, ptr %s2.data, i32 %s2.len, ptr %context) unnamed_addr #2 {
 entry:
  %0 = call i1 @runtime.stringEqual(ptr %s1.data, i32 %s1.len, ptr %s2.data, i32 %s2.len, ptr undef) #3
  ret i1 %0
 }

-declare i1 @runtime.stringEqual(ptr readonly, i32, ptr readonly, i32, ptr) #1
+declare i1 @runtime.stringEqual(ptr, i32, ptr, i32, ptr) #1

 ; Function Attrs: nounwind
-define hidden i1 @main.stringCompareUnequal(ptr readonly %s1.data, i32 %s1.len, ptr readonly %s2.data, i32 %s2.len, ptr %context) unnamed_addr #2 {
+define hidden i1 @main.stringCompareUnequal(ptr %s1.data, i32 %s1.len, ptr %s2.data, i32 %s2.len, ptr %context) unnamed_addr #2 {
 entry:
  %0 = call i1 @runtime.stringEqual(ptr %s1.data, i32 %s1.len, ptr %s2.data, i32 %s2.len, ptr undef) #3
  %1 = xor i1 %0, true
@@ -72,16 +72,16 @@ entry:
 }

 ; Function Attrs: nounwind
-define hidden i1 @main.stringCompareLarger(ptr readonly %s1.data, i32 %s1.len, ptr readonly %s2.data, i32 %s2.len, ptr %context) unnamed_addr #2 {
+define hidden i1 @main.stringCompareLarger(ptr %s1.data, i32 %s1.len, ptr %s2.data, i32 %s2.len, ptr %context) unnamed_addr #2 {
 entry:
  %0 = call i1 @runtime.stringLess(ptr %s2.data, i32 %s2.len, ptr %s1.data, i32 %s1.len, ptr undef) #3
  ret i1 %0
 }

-declare i1 @runtime.stringLess(ptr readonly, i32, ptr readonly, i32, ptr) #1
+declare i1 @runtime.stringLess(ptr, i32, ptr, i32, ptr) #1

 ; Function Attrs: nounwind
-define hidden i8 @main.stringLookup(ptr readonly %s.data, i32 %s.len, i8 %x, ptr %context) unnamed_addr #2 {
+define hidden i8 @main.stringLookup(ptr %s.data, i32 %s.len, i8 %x, ptr %context) unnamed_addr #2 {
 entry:
  %0 = zext i8 %x to i32
  %.not = icmp ugt i32 %s.len, %0
@@ -256,7 +256,6 @@ func pathsToOverride(goMinor int, needsSyscallPackage bool) map[string]bool {
 		"reflect/":                    false,
 		"runtime/":                    false,
 		"sync/":                       true,
-		"testing/":                    true,
 		"tinygo/":                     false,
 		"unique/":                     false,
 	}
@@ -1635,7 +1635,6 @@ func main() {
 	cpuprofile := flag.String("cpuprofile", "", "cpuprofile output")
 	monitor := flag.Bool("monitor", false, "enable serial monitor")
 	baudrate := flag.Int("baudrate", 115200, "baudrate of serial monitor")
-	gocompatibility := flag.Bool("go-compatibility", true, "enable to check for Go versions compatibility, you can also configure this by setting the TINYGO_GOCOMPATIBILITY environment variable")

 	// Internal flags, that are only intended for TinyGo development.
 	printIR := flag.Bool("internal-printir", false, "print LLVM IR")
@@ -1713,16 +1712,6 @@ func main() {
 		ocdCommands = strings.Split(*ocdCommandsString, ",")
 	}

-	val, ok := os.LookupEnv("TINYGO_GOCOMPATIBILITY")
-	if ok {
-		b, err := strconv.ParseBool(val)
-		if err != nil {
-			fmt.Fprintf(os.Stderr, "could not parse TINYGO_GOCOMPATIBILITY value %q: %v\n", val, err)
-			os.Exit(1)
-		}
-		*gocompatibility = b
-	}
-
 	options := &compileopts.Options{
 		GOOS:            goenv.Get("GOOS"),
 		GOARCH:          goenv.Get("GOARCH"),
@@ -1759,7 +1748,6 @@ func main() {
 		Timeout:         *timeout,
 		WITPackage:      witPackage,
 		WITWorld:        witWorld,
-		GoCompatibility: *gocompatibility,
 	}
 	if *printCommands {
 		options.PrintCommands = printCommand
@@ -1,173 +0,0 @@
-//go:build pico2_ice
-
-// Most of the info is from
-// https://pico2-ice.tinyvision.ai/md_pinout.html although
-// (2025-09-07) RP4 appears twice in that pinout - the schematic is
-// more clear. Consistent with other RPi boards, we use GPn instead of
-// RPn to reference the RPi connected pins.
-
-package machine
-
-// GPIO pins
-const (
-	GP0  = GPIO0
-	GP1  = GPIO1
-	GP2  = GPIO2
-	GP3  = GPIO3
-	GP4  = GPIO4
-	GP5  = GPIO5
-	GP6  = GPIO6
-	GP7  = GPIO7
-	GP8  = GPIO8
-	GP9  = GPIO9
-	GP10 = GPIO10
-	GP11 = GPIO11
-	GP12 = GPIO12
-	GP13 = GPIO13
-	GP14 = GPIO14
-	GP15 = GPIO15
-	GP16 = GPIO16
-	GP17 = GPIO17
-	GP18 = GPIO18
-	GP19 = GPIO19
-	GP20 = GPIO20
-	GP21 = GPIO21
-	GP22 = GPIO22
-	GP23 = GPIO23
-	GP24 = GPIO24
-	GP25 = GPIO25
-	GP26 = GPIO26
-	GP27 = GPIO27
-	GP28 = GPIO28
-	GP29 = GPIO29
-	GP30 = GPIO30
-	GP31 = GPIO31
-	GP32 = GPIO32
-	GP33 = GPIO33
-	GP34 = GPIO34
-	GP35 = GPIO35
-	GP36 = GPIO36
-	GP37 = GPIO37
-	GP38 = GPIO38
-	GP39 = GPIO39
-	GP40 = GPIO40
-	GP41 = GPIO41
-	GP42 = GPIO42
-	GP43 = GPIO43
-	GP44 = GPIO44
-	GP45 = GPIO45
-	GP46 = GPIO46
-	GP47 = GPIO47
-
-	// RPi pins shared with ICE. The ICE number is what appears on
-	// the board silkscreen.
-	ICE9  = GP28
-	ICE11 = GP29
-	ICE14 = GP7
-	ICE15 = GP6
-	ICE16 = GP5
-	ICE17 = GP4
-	ICE18 = GP27
-	ICE19 = GP23
-	ICE20 = GP22
-	ICE21 = GP26
-	ICE23 = GP25
-	ICE25 = GP30
-	ICE26 = GP24
-	ICE27 = GP20
-
-	// FPGA Clock pin.
-	ICE35_G0 = GP21
-
-	// Silkscreen & Pinout names
-	ICE_SSN = ICE16
-	ICE_SO  = ICE14
-	ICE_SI  = ICE17
-	ICE_CK  = ICE15
-	SD      = GP2
-	SC      = GP3
-
-	FPGA_RSTN = GP31
-	A3        = GP32
-	A1        = GP33
-	A4        = GP34
-	A2        = GP35
-	B3        = GP36
-	B1        = GP37
-	B4        = GP38
-	B2        = GP39
-	N0        = GP40 // On the board these are labeled "~0"
-	N1        = GP41
-	N2        = GP42
-	N3        = GP43
-	N4        = GP44
-	N5        = GP45
-	N6        = GP46
-
-	// Functions from Schematic.
-	ICE_DONE = GP40
-	USB_BOOT = GP42
-
-	// Button
-	SW1     = GP42
-	BOOTSEL = GP42
-
-	// Tricolor LEDs
-	LED_RED   = GP1
-	LED_GREEN = GP0
-	LED_BLUE  = GP9
-
-	// Onboard LED
-	LED = LED_GREEN
-
-	// Onboard crystal oscillator frequency, in MHz.
-	xoscFreq = 12 // MHz
-)
-
-// This board does not define default i2c pins.
-const (
-	I2C0_SDA_PIN = NoPin
-	I2C0_SCL_PIN = NoPin
-	I2C1_SDA_PIN = NoPin
-	I2C1_SCL_PIN = NoPin
-)
-
-// SPI default pins
-const (
-	// Default Serial Clock Bus 0 for SPI communications
-	SPI0_SCK_PIN = GPIO18
-	// Default Serial Out Bus 0 for SPI communications
-	SPI0_SDO_PIN = GPIO19 // Tx
-	// Default Serial In Bus 0 for SPI communications
-	SPI0_SDI_PIN = GPIO16 // Rx
-
-	// Default Serial Clock Bus 1 for SPI communications
-	SPI1_SCK_PIN = GPIO10
-	// Default Serial Out Bus 1 for SPI communications
-	SPI1_SDO_PIN = GPIO11 // Tx
-	// Default Serial In Bus 1 for SPI communications
-	SPI1_SDI_PIN = GPIO12 // Rx
-)
-
-// UART pins
-const (
-	UART0_TX_PIN = GPIO0
-	UART0_RX_PIN = GPIO1
-	UART1_TX_PIN = GPIO8
-	UART1_RX_PIN = GPIO9
-	UART_TX_PIN  = UART0_TX_PIN
-	UART_RX_PIN  = UART0_RX_PIN
-)
-
-var DefaultUART = UART0
-
-// USB identifiers
-const (
-	usb_STRING_PRODUCT      = "Pico2"
-	usb_STRING_MANUFACTURER = "Raspberry Pi"
-)
-
-var (
-	usb_VID uint16 = 0x2E8A
-	usb_PID uint16 = 0x000A
-)
@@ -69,5 +69,3 @@ const eraseBlockSizeValue = 4096
 func eraseBlockSize() int64 {
 	return eraseBlockSizeValue
 }
-
-const spiMaxBufferSize = 255 // from the datasheet: TXD.MAXCNT and RXD.MAXCNT
@@ -90,5 +90,3 @@ const eraseBlockSizeValue = 4096
 func eraseBlockSize() int64 {
 	return eraseBlockSizeValue
 }
-
-const spiMaxBufferSize = 0xffff // from the datasheet: TXD.MAXCNT and RXD.MAXCNT
@@ -108,5 +108,3 @@ const eraseBlockSizeValue = 4096
 func eraseBlockSize() int64 {
 	return eraseBlockSizeValue
 }
-
-const spiMaxBufferSize = 0xffff // from the datasheet: TXD.MAXCNT and RXD.MAXCNT
@@ -301,16 +301,18 @@ func (spi *SPI) Transfer(w byte) (byte, error) {
 // padded until they fit: if len(w) > len(r) the extra bytes received will be
 // dropped and if len(w) < len(r) extra 0 bytes will be sent.
 func (spi *SPI) Tx(w, r []byte) error {
-	// Unfortunately the hardware (on the nrf52832) only supports a limited
-	// amount of bytes in the buffers (depending on the chip), so if either w or
-	// r is longer than that the transfer needs to be broken up in pieces.
+	// Unfortunately the hardware (on the nrf52832) only supports up to 255
+	// bytes in the buffers, so if either w or r is longer than that the
+	// transfer needs to be broken up in pieces.
+	// The nrf52840 supports far larger buffers however, which isn't yet
+	// supported.
 	for len(r) != 0 || len(w) != 0 {
 		// Prepare the SPI transfer: set the DMA pointers and lengths.
 		// read buffer
 		nr := uint32(len(r))
 		if nr > 0 {
-			if nr > spiMaxBufferSize {
-				nr = spiMaxBufferSize
+			if nr > 255 {
+				nr = 255
 			}
 			spi.Bus.RXD.PTR.Set(uint32(uintptr(unsafe.Pointer(&r[0]))))
 			r = r[nr:]
@@ -320,8 +322,8 @@ func (spi *SPI) Tx(w, r []byte) error {
 		// write buffer
 		nw := uint32(len(w))
 		if nw > 0 {
-			if nw > spiMaxBufferSize {
-				nw = spiMaxBufferSize
+			if nw > 255 {
+				nw = 255
 			}
 			spi.Bus.TXD.PTR.Set(uint32(uintptr(unsafe.Pointer(&w[0]))))
 			w = w[nw:]
@@ -124,31 +124,6 @@ const (
 	fnXIP pinFunc = 0
 )

-// validPins confirms that the SPI pin selection is a legitimate one
-// for the the 2040 chip.
-func (spi *SPI) validPins(config SPIConfig) error {
-	var okSDI, okSDO, okSCK bool
-	switch spi.Bus {
-	case rp.SPI0:
-		okSDI = config.SDI == 0 || config.SDI == 4 || config.SDI == 16 || config.SDI == 20
-		okSDO = config.SDO == 3 || config.SDO == 7 || config.SDO == 19 || config.SDO == 23
-		okSCK = config.SCK == 2 || config.SCK == 6 || config.SCK == 18 || config.SCK == 22
-	case rp.SPI1:
-		okSDI = config.SDI == 8 || config.SDI == 12 || config.SDI == 24 || config.SDI == 28
-		okSDO = config.SDO == 11 || config.SDO == 15 || config.SDO == 27
-		okSCK = config.SCK == 10 || config.SCK == 14 || config.SCK == 26
-	}
-	switch {
-	case !okSDI:
-		return errSPIInvalidSDI
-	case !okSDO:
-		return errSPIInvalidSDO
-	case !okSCK:
-		return errSPIInvalidSCK
-	}
-	return nil
-}
-
 // Configure configures the gpio pin as per mode.
 func (p Pin) Configure(config PinConfig) {
 	if p == NoPin {
@@ -2,8 +2,6 @@

 package machine

-import "device/rp"
-
 // Analog pins on RP2350a.
 const (
 	ADC0 Pin = GPIO26
@@ -14,28 +12,3 @@ const (
 	// fifth ADC channel.
 	thermADC = 30
 )
-
-// validPins confirms that the SPI pin selection is a legitimate one
-// for the the 2350a chip.
-func (spi *SPI) validPins(config SPIConfig) error {
-	var okSDI, okSDO, okSCK bool
-	switch spi.Bus {
-	case rp.SPI0:
-		okSDI = config.SDI == 0 || config.SDI == 4 || config.SDI == 16 || config.SDI == 20
-		okSDO = config.SDO == 3 || config.SDO == 7 || config.SDO == 19 || config.SDO == 23
-		okSCK = config.SCK == 2 || config.SCK == 6 || config.SCK == 18 || config.SCK == 22
-	case rp.SPI1:
-		okSDI = config.SDI == 8 || config.SDI == 12 || config.SDI == 24 || config.SDI == 28
-		okSDO = config.SDO == 11 || config.SDO == 15 || config.SDO == 27
-		okSCK = config.SCK == 10 || config.SCK == 14 || config.SCK == 26
-	}
-	switch {
-	case !okSDI:
-		return errSPIInvalidSDI
-	case !okSDO:
-		return errSPIInvalidSDO
-	case !okSCK:
-		return errSPIInvalidSCK
-	}
-	return nil
-}
@@ -2,8 +2,6 @@

 package machine

-import "device/rp"
-
 // RP2350B has additional pins.

 const (
@@ -48,28 +46,3 @@ var (
 	PWM10 = getPWMGroup(10)
 	PWM11 = getPWMGroup(11)
 )
-
-// validPins confirms that the SPI pin selection is a legitimate one
-// for the the 2350b chip.
-func (spi *SPI) validPins(config SPIConfig) error {
-	var okSDI, okSDO, okSCK bool
-	switch spi.Bus {
-	case rp.SPI0:
-		okSDI = config.SDI == 0 || config.SDI == 4 || config.SDI == 16 || config.SDI == 20 || config.SDI == 32 || config.SDI == 36
-		okSDO = config.SDO == 3 || config.SDO == 7 || config.SDO == 19 || config.SDO == 23 || config.SDO == 35 || config.SDO == 39
-		okSCK = config.SCK == 2 || config.SCK == 6 || config.SCK == 18 || config.SCK == 22 || config.SCK == 34 || config.SCK == 38
-	case rp.SPI1:
-		okSDI = config.SDI == 8 || config.SDI == 12 || config.SDI == 24 || config.SDI == 28 || config.SDI == 40 || config.SDI == 44
-		okSDO = config.SDO == 11 || config.SDO == 15 || config.SDO == 27 || config.SDO == 31 || config.SDO == 43 || config.SDO == 47
-		okSCK = config.SCK == 10 || config.SCK == 14 || config.SCK == 26 || config.SCK == 30 || config.SCK == 42 || config.SCK == 46
-	}
-	switch {
-	case !okSDI:
-		return errSPIInvalidSDI
-	case !okSDO:
-		return errSPIInvalidSDO
-	case !okSCK:
-		return errSPIInvalidSCK
-	}
-	return nil
-}
@@ -108,7 +108,7 @@ func (spi *SPI) SetBaudRate(br uint32) error {
 	var prescale, postdiv uint32
 	freq := CPUFrequency()
 	for prescale = 2; prescale < 255; prescale += 2 {
-		if uint64(freq) < uint64((prescale+2)*256)*uint64(br) {
+		if freq < (prescale+2)*256*br {
 			break
 		}
 	}
@@ -165,9 +165,27 @@ func (spi *SPI) Configure(config SPIConfig) error {
 			config.SDI = SPI1_SDI_PIN
 		}
 	}
-	if err := spi.validPins(config); err != nil {
-		return err
+	var okSDI, okSDO, okSCK bool
+	switch spi.Bus {
+	case rp.SPI0:
+		okSDI = config.SDI == 0 || config.SDI == 4 || config.SDI == 16 || config.SDI == 20
+		okSDO = config.SDO == 3 || config.SDO == 7 || config.SDO == 19 || config.SDO == 23
+		okSCK = config.SCK == 2 || config.SCK == 6 || config.SCK == 18 || config.SCK == 22
+	case rp.SPI1:
+		okSDI = config.SDI == 8 || config.SDI == 12 || config.SDI == 24 || config.SDI == 28
+		okSDO = config.SDO == 11 || config.SDO == 15 || config.SDO == 27
+		okSCK = config.SCK == 10 || config.SCK == 14 || config.SCK == 26
 	}
+
+	switch {
+	case !okSDI:
+		return errSPIInvalidSDI
+	case !okSDO:
+		return errSPIInvalidSDO
+	case !okSCK:
+		return errSPIInvalidSCK
+	}
+
 	if config.Frequency == 0 {
 		config.Frequency = defaultBaud
 	}
@@ -8,21 +8,16 @@ import "unsafe"
 // code linked from other languages can allocate memory without colliding with
 // our GC allocations.

-// Map of allocations, where the key is the allocated pointer and the value is
-// the size of the allocation.
-// TODO: make this a map[unsafe.Pointer]uintptr, since that results in slightly
-// smaller binaries. But for that to work, unsafe.Pointer needs to be seen as a
-// binary key (which it is not at the moment).
-// See https://github.com/tinygo-org/tinygo/pull/4898 for details.
-var allocs = make(map[*byte]uintptr)
+var allocs = make(map[uintptr][]byte)

 //export malloc
 func libc_malloc(size uintptr) unsafe.Pointer {
 	if size == 0 {
 		return nil
 	}
-	ptr := alloc(size, nil)
-	allocs[(*byte)(ptr)] = size
+	buf := make([]byte, size)
+	ptr := unsafe.Pointer(&buf[0])
+	allocs[uintptr(ptr)] = buf
 	return ptr
 }

@@ -31,8 +26,8 @@ func libc_free(ptr unsafe.Pointer) {
 	if ptr == nil {
 		return
 	}
-	if _, ok := allocs[(*byte)(ptr)]; ok {
-		delete(allocs, (*byte)(ptr))
+	if _, ok := allocs[uintptr(ptr)]; ok {
+		delete(allocs, uintptr(ptr))
 	} else {
 		panic("free: invalid pointer")
 	}
@@ -53,20 +48,18 @@ func libc_realloc(oldPtr unsafe.Pointer, size uintptr) unsafe.Pointer {

 	// It's hard to optimize this to expand the current buffer with our GC, but
 	// it is theoretically possible. For now, just always allocate fresh.
-	// TODO: we could skip this if the new allocation is smaller than the old.
-	ptr := alloc(size, nil)
+	buf := make([]byte, size)

 	if oldPtr != nil {
-		if oldSize, ok := allocs[(*byte)(oldPtr)]; ok {
-			oldBuf := unsafe.Slice((*byte)(oldPtr), oldSize)
-			newBuf := unsafe.Slice((*byte)(ptr), size)
-			copy(newBuf, oldBuf)
-			delete(allocs, (*byte)(oldPtr))
+		if oldBuf, ok := allocs[uintptr(oldPtr)]; ok {
+			copy(buf, oldBuf)
+			delete(allocs, uintptr(oldPtr))
 		} else {
 			panic("realloc: invalid pointer")
 		}
 	}

-	allocs[(*byte)(ptr)] = size
+	ptr := unsafe.Pointer(&buf[0])
+	allocs[uintptr(ptr)] = buf
 	return ptr
 }
@@ -30,7 +30,9 @@ func SetPanicOnFault(enabled bool) bool {

 func WriteHeapDump(fd uintptr)

-func SetTraceback(level string)
+// Unimplemented.
+func SetTraceback(level string) {
+}

 func SetMemoryLimit(limit int64) int64 {
 	return limit
@@ -1,6 +1,11 @@
 package runtime

 func Callers(skip int, pc []uintptr) int {
+	if len(pc) > 0 {
+		// The testing package expects at least one caller in all cases.
+		pc[0] = 0
+		return 1
+	}
 	return 0
 }

@@ -181,3 +181,19 @@ func getAuxv() []uintptr {
 func cgo_errno() uintptr {
 	return uintptr(*libc_errno_location())
 }
+
+// Unimplemented.
+var MemProfileRate int = 0
+
+// Unimplemented.
+func SetBlockProfileRate(rate int) {
+}
+
+var mutexProfileFraction int
+
+// Unimplemented.
+func SetMutexProfileFraction(rate int) int {
+	previous := mutexProfileFraction
+	mutexProfileFraction = rate
+	return previous
+}
@@ -273,9 +273,6 @@ func nanosecondsToTicks(ns int64) timeUnit {
 func sleepTicks(d timeUnit) {
 	for d != 0 {
 		ticks := uint32(d)
-		if d > 0xffff_ffff {
-			ticks = 0xffff_ffff
-		}
 		if !timerSleep(ticks) {
 			// Bail out early to handle a non-time interrupt.
 			return
@@ -266,9 +266,6 @@ func nanosecondsToTicks(ns int64) timeUnit {
 func sleepTicks(d timeUnit) {
 	for d != 0 {
 		ticks := uint32(d)
-		if d > 0xffff_ffff {
-			ticks = 0xffff_ffff
-		}
 		if !timerSleep(ticks) {
 			return
 		}
@@ -78,9 +78,6 @@ func buffered() int {
 func sleepTicks(d timeUnit) {
 	for d != 0 {
 		ticks := uint32(d) & 0x7fffff // 23 bits (to be on the safe side)
-		if d > 0x7fffff {
-			ticks = 0x7fffff
-		}
 		rtc_sleep(ticks)
 		d -= timeUnit(ticks)
 	}
@@ -81,9 +81,6 @@ func buffered() int {
 func sleepTicks(d timeUnit) {
 	for d != 0 {
 		ticks := uint32(d) & 0x7fffff // 23 bits (to be on the safe side)
-		if d > 0x7fffff {
-			ticks = 0x7fffff
-		}
 		rtc_sleep(ticks)
 		d -= timeUnit(ticks)
 	}
@@ -212,7 +212,6 @@ func writeStream(stream *wasiStream, buf *byte, count uint, offset int64) int {
 			return -1
 		}
 		remaining -= len
-		src = src[len:]
 	}

 	return int(count)
@@ -1,521 +0,0 @@
-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-//
-// This file has been modified for use by the TinyGo compiler.
-
-package testing
-
-import (
-	"flag"
-	"fmt"
-	"io"
-	"math"
-	"os"
-	"runtime"
-	"strconv"
-	"strings"
-	"time"
-)
-
-func initBenchmarkFlags() {
-	matchBenchmarks = flag.String("test.bench", "", "run only benchmarks matching `regexp`")
-	benchmarkMemory = flag.Bool("test.benchmem", false, "print memory allocations for benchmarks")
-	flag.Var(&benchTime, "test.benchtime", "run each benchmark for duration `d`")
-}
-
-var (
-	matchBenchmarks *string
-	benchmarkMemory *bool
-	benchTime       = benchTimeFlag{d: 1 * time.Second} // changed during test of testing package
-)
-
-type benchTimeFlag struct {
-	d time.Duration
-	n int
-}
-
-func (f *benchTimeFlag) String() string {
-	if f.n > 0 {
-		return fmt.Sprintf("%dx", f.n)
-	}
-	return time.Duration(f.d).String()
-}
-
-func (f *benchTimeFlag) Set(s string) error {
-	if strings.HasSuffix(s, "x") {
-		n, err := strconv.ParseInt(s[:len(s)-1], 10, 0)
-		if err != nil || n <= 0 {
-			return fmt.Errorf("invalid count")
-		}
-		*f = benchTimeFlag{n: int(n)}
-		return nil
-	}
-	d, err := time.ParseDuration(s)
-	if err != nil || d <= 0 {
-		return fmt.Errorf("invalid duration")
-	}
-	*f = benchTimeFlag{d: d}
-	return nil
-}
-
-// InternalBenchmark is an internal type but exported because it is cross-package;
-// it is part of the implementation of the "go test" command.
-type InternalBenchmark struct {
-	Name string
-	F    func(b *B)
-}
-
-// B is a type passed to Benchmark functions to manage benchmark
-// timing and to specify the number of iterations to run.
-//
-// A benchmark ends when its Benchmark function returns or calls any of the methods
-// FailNow, Fatal, Fatalf, SkipNow, Skip, or Skipf. Those methods must be called
-// only from the goroutine running the Benchmark function.
-// The other reporting methods, such as the variations of Log and Error,
-// may be called simultaneously from multiple goroutines.
-//
-// Like in tests, benchmark logs are accumulated during execution
-// and dumped to standard output when done. Unlike in tests, benchmark logs
-// are always printed, so as not to hide output whose existence may be
-// affecting benchmark results.
-type B struct {
-	common
-	context      *benchContext
-	N            int
-	benchFunc    func(b *B)
-	bytes        int64
-	missingBytes bool // one of the subbenchmarks does not have bytes set.
-	benchTime    benchTimeFlag
-	timerOn      bool
-	result       BenchmarkResult
-
-	// report memory statistics
-	showAllocResult bool
-	// initial state of MemStats.Mallocs and MemStats.TotalAlloc
-	startAllocs uint64
-	startBytes  uint64
-	// net total after running benchmar
-	netAllocs uint64
-	netBytes  uint64
-}
-
-// StartTimer starts timing a test. This function is called automatically
-// before a benchmark starts, but it can also be used to resume timing after
-// a call to StopTimer.
-func (b *B) StartTimer() {
-	if !b.timerOn {
-		b.start = time.Now()
-		b.timerOn = true
-
-		var mstats runtime.MemStats
-		runtime.ReadMemStats(&mstats)
-		b.startAllocs = mstats.Mallocs
-		b.startBytes = mstats.TotalAlloc
-	}
-}
-
-// StopTimer stops timing a test. This can be used to pause the timer
-// while performing complex initialization that you don't
-// want to measure.
-func (b *B) StopTimer() {
-	if b.timerOn {
-		b.duration += time.Since(b.start)
-		b.timerOn = false
-
-		var mstats runtime.MemStats
-		runtime.ReadMemStats(&mstats)
-		b.netAllocs += mstats.Mallocs - b.startAllocs
-		b.netBytes += mstats.TotalAlloc - b.startBytes
-	}
-}
-
-// ResetTimer zeroes the elapsed benchmark time and memory allocation counters
-// and deletes user-reported metrics.
-func (b *B) ResetTimer() {
-	if b.timerOn {
-		b.start = time.Now()
-
-		var mstats runtime.MemStats
-		runtime.ReadMemStats(&mstats)
-		b.startAllocs = mstats.Mallocs
-		b.startBytes = mstats.TotalAlloc
-	}
-	b.duration = 0
-	b.netAllocs = 0
-	b.netBytes = 0
-}
-
-// SetBytes records the number of bytes processed in a single operation.
-// If this is called, the benchmark will report ns/op and MB/s.
-func (b *B) SetBytes(n int64) { b.bytes = n }
-
-// ReportAllocs enables malloc statistics for this benchmark.
-// It is equivalent to setting -test.benchmem, but it only affects the
-// benchmark function that calls ReportAllocs.
-func (b *B) ReportAllocs() {
-	b.showAllocResult = true
-}
-
-// runN runs a single benchmark for the specified number of iterations.
-func (b *B) runN(n int) {
-	b.N = n
-	runtime.GC()
-	b.ResetTimer()
-	b.StartTimer()
-	b.benchFunc(b)
-	b.StopTimer()
-}
-
-func min(x, y int64) int64 {
-	if x > y {
-		return y
-	}
-	return x
-}
-
-func max(x, y int64) int64 {
-	if x < y {
-		return y
-	}
-	return x
-}
-
-// run1 runs the first iteration of benchFunc. It reports whether more
-// iterations of this benchmarks should be run.
-func (b *B) run1() bool {
-	if ctx := b.context; ctx != nil {
-		// Extend maxLen, if needed.
-		if n := len(b.name); n > ctx.maxLen {
-			ctx.maxLen = n + 8 // Add additional slack to avoid too many jumps in size.
-		}
-	}
-	b.runN(1)
-	return !b.hasSub
-}
-
-// run executes the benchmark.
-func (b *B) run() {
-	if b.context != nil {
-		// Running go test --test.bench
-		b.processBench(b.context) // calls doBench and prints results
-	} else {
-		// Running func Benchmark.
-		b.doBench()
-	}
-}
-
-func (b *B) doBench() BenchmarkResult {
-	// in upstream, this uses a goroutine
-	b.launch()
-	return b.result
-}
-
-// launch launches the benchmark function. It gradually increases the number
-// of benchmark iterations until the benchmark runs for the requested benchtime.
-// run1 must have been called on b.
-func (b *B) launch() {
-	// Run the benchmark for at least the specified amount of time.
-	if b.benchTime.n > 0 {
-		b.runN(b.benchTime.n)
-	} else {
-		d := b.benchTime.d
-		b.failed = false
-		b.duration = 0
-		for n := int64(1); !b.failed && b.duration < d && n < 1e9; {
-			last := n
-			// Predict required iterations.
-			goalns := d.Nanoseconds()
-			prevIters := int64(b.N)
-			prevns := b.duration.Nanoseconds()
-			if prevns <= 0 {
-				// Round up, to avoid div by zero.
-				prevns = 1
-			}
-			// Order of operations matters.
-			// For very fast benchmarks, prevIters ~= prevns.
-			// If you divide first, you get 0 or 1,
-			// which can hide an order of magnitude in execution time.
-			// So multiply first, then divide.
-			n = goalns * prevIters / prevns
-			// Run more iterations than we think we'll need (1.2x).
-			n += n / 5
-			// Don't grow too fast in case we had timing errors previously.
-			n = min(n, 100*last)
-			// Be sure to run at least one more than last time.
-			n = max(n, last+1)
-			// Don't run more than 1e9 times. (This also keeps n in int range on 32 bit platforms.)
-			n = min(n, 1e9)
-			b.runN(int(n))
-		}
-	}
-	b.result = BenchmarkResult{b.N, b.duration, b.bytes, b.netAllocs, b.netBytes}
-}
-
-// BenchmarkResult contains the results of a benchmark run.
-type BenchmarkResult struct {
-	N     int           // The number of iterations.
-	T     time.Duration // The total time taken.
-	Bytes int64         // Bytes processed in one iteration.
-
-	MemAllocs uint64 // The total number of memory allocations.
-	MemBytes  uint64 // The total number of bytes allocated.
-}
-
-// NsPerOp returns the "ns/op" metric.
-func (r BenchmarkResult) NsPerOp() int64 {
-	if r.N <= 0 {
-		return 0
-	}
-	return r.T.Nanoseconds() / int64(r.N)
-}
-
-// mbPerSec returns the "MB/s" metric.
-func (r BenchmarkResult) mbPerSec() float64 {
-	if r.Bytes <= 0 || r.T <= 0 || r.N <= 0 {
-		return 0
-	}
-	return (float64(r.Bytes) * float64(r.N) / 1e6) / r.T.Seconds()
-}
-
-// AllocsPerOp returns the "allocs/op" metric,
-// which is calculated as r.MemAllocs / r.N.
-func (r BenchmarkResult) AllocsPerOp() int64 {
-	if r.N <= 0 {
-		return 0
-	}
-	return int64(r.MemAllocs) / int64(r.N)
-}
-
-// AllocedBytesPerOp returns the "B/op" metric,
-// which is calculated as r.MemBytes / r.N.
-func (r BenchmarkResult) AllocedBytesPerOp() int64 {
-	if r.N <= 0 {
-		return 0
-	}
-	return int64(r.MemBytes) / int64(r.N)
-}
-
-// String returns a summary of the benchmark results.
-// It follows the benchmark result line format from
-// https://golang.org/design/14313-benchmark-format, not including the
-// benchmark name.
-// Extra metrics override built-in metrics of the same name.
-// String does not include allocs/op or B/op, since those are reported
-// by MemString.
-func (r BenchmarkResult) String() string {
-	buf := new(strings.Builder)
-	fmt.Fprintf(buf, "%8d", r.N)
-
-	// Get ns/op as a float.
-	ns := float64(r.T.Nanoseconds()) / float64(r.N)
-	if ns != 0 {
-		buf.WriteByte('\t')
-		prettyPrint(buf, ns, "ns/op")
-	}
-
-	if mbs := r.mbPerSec(); mbs != 0 {
-		fmt.Fprintf(buf, "\t%7.2f MB/s", mbs)
-	}
-	return buf.String()
-}
-
-// MemString returns r.AllocedBytesPerOp and r.AllocsPerOp in the same format as 'go test'.
-func (r BenchmarkResult) MemString() string {
-	return fmt.Sprintf("%8d B/op\t%8d allocs/op",
-		r.AllocedBytesPerOp(), r.AllocsPerOp())
-}
-
-func prettyPrint(w io.Writer, x float64, unit string) {
-	// Print all numbers with 10 places before the decimal point
-	// and small numbers with four sig figs. Field widths are
-	// chosen to fit the whole part in 10 places while aligning
-	// the decimal point of all fractional formats.
-	var format string
-	switch y := math.Abs(x); {
-	case y == 0 || y >= 999.95:
-		format = "%10.0f %s"
-	case y >= 99.995:
-		format = "%12.1f %s"
-	case y >= 9.9995:
-		format = "%13.2f %s"
-	case y >= 0.99995:
-		format = "%14.3f %s"
-	case y >= 0.099995:
-		format = "%15.4f %s"
-	case y >= 0.0099995:
-		format = "%16.5f %s"
-	case y >= 0.00099995:
-		format = "%17.6f %s"
-	default:
-		format = "%18.7f %s"
-	}
-	fmt.Fprintf(w, format, x, unit)
-}
-
-type benchContext struct {
-	match *matcher
-
-	maxLen int // The largest recorded benchmark name.
-}
-
-func runBenchmarks(matchString func(pat, str string) (bool, error), benchmarks []InternalBenchmark) bool {
-	// If no flag was specified, don't run benchmarks.
-	if len(*matchBenchmarks) == 0 {
-		return true
-	}
-	ctx := &benchContext{
-		match: newMatcher(matchString, *matchBenchmarks, "-test.bench", flagSkipRegexp),
-	}
-	var bs []InternalBenchmark
-	for _, Benchmark := range benchmarks {
-		if _, matched, _ := ctx.match.fullName(nil, Benchmark.Name); matched {
-			bs = append(bs, Benchmark)
-			benchName := Benchmark.Name
-			if l := len(benchName); l > ctx.maxLen {
-				ctx.maxLen = l
-			}
-		}
-	}
-	main := &B{
-		common: common{
-			output: &logger{},
-			name:   "Main",
-		},
-		benchTime: benchTime,
-		benchFunc: func(b *B) {
-			for _, Benchmark := range bs {
-				b.Run(Benchmark.Name, Benchmark.F)
-			}
-		},
-		context: ctx,
-	}
-
-	main.runN(1)
-	return true
-}
-
-// processBench runs bench b and prints the results.
-func (b *B) processBench(ctx *benchContext) {
-	benchName := b.name
-
-	for i := 0; i < flagCount; i++ {
-		if ctx != nil {
-			fmt.Printf("%-*s\t", ctx.maxLen, benchName)
-		}
-		r := b.doBench()
-		if b.failed {
-			// The output could be very long here, but probably isn't.
-			// We print it all, regardless, because we don't want to trim the reason
-			// the benchmark failed.
-			fmt.Printf("--- FAIL: %s\n%s", benchName, "") // b.output)
-			return
-		}
-		if ctx != nil {
-			results := r.String()
-
-			if *benchmarkMemory || b.showAllocResult {
-				results += "\t" + r.MemString()
-			}
-			fmt.Println(results)
-
-			// Print any benchmark output
-			if b.output.Len() > 0 {
-				fmt.Printf("--- BENCH: %s\n", benchName)
-				b.output.WriteTo(os.Stdout)
-			}
-		}
-	}
-}
-
-// Run benchmarks f as a subbenchmark with the given name. It reports
-// true if the subbenchmark succeeded.
-//
-// A subbenchmark is like any other benchmark. A benchmark that calls Run at
-// least once will not be measured itself and will be called once with N=1.
-func (b *B) Run(name string, f func(b *B)) bool {
-	benchName, ok, partial := b.name, true, false
-	if b.context != nil {
-		benchName, ok, partial = b.context.match.fullName(&b.common, name)
-	}
-	if !ok {
-		return true
-	}
-	b.hasSub = true
-	sub := &B{
-		common: common{
-			output: &logger{},
-			name:   benchName,
-			level:  b.level + 1,
-		},
-		benchFunc: f,
-		benchTime: b.benchTime,
-		context:   b.context,
-	}
-	if partial {
-		// Partial name match, like -bench=X/Y matching BenchmarkX.
-		// Only process sub-benchmarks, if any.
-		sub.hasSub = true
-	}
-	if sub.run1() {
-		sub.run()
-	}
-	b.add(sub.result)
-	return !sub.failed
-}
-
-// add simulates running benchmarks in sequence in a single iteration. It is
-// used to give some meaningful results in case func Benchmark is used in
-// combination with Run.
-func (b *B) add(other BenchmarkResult) {
-	r := &b.result
-	// The aggregated BenchmarkResults resemble running all subbenchmarks as
-	// in sequence in a single benchmark.
-	r.N = 1
-	r.T += time.Duration(other.NsPerOp())
-	if other.Bytes == 0 {
-		// Summing Bytes is meaningless in aggregate if not all subbenchmarks
-		// set it.
-		b.missingBytes = true
-		r.Bytes = 0
-	}
-	if !b.missingBytes {
-		r.Bytes += other.Bytes
-	}
-}
-
-// A PB is used by RunParallel for running parallel benchmarks.
-type PB struct {
-}
-
-// Next reports whether there are more iterations to execute.
-func (pb *PB) Next() bool {
-	return false
-}
-
-// RunParallel runs a benchmark in parallel.
-//
-// Not implemented
-func (b *B) RunParallel(body func(*PB)) {
-	return
-}
-
-func (b *B) Loop() bool {
-	panic("unimplemented: testing.B.Loop")
-}
-
-// Benchmark benchmarks a single function. It is useful for creating
-// custom benchmarks that do not use the "go test" command.
-//
-// If f calls Run, the result will be an estimate of running all its
-// subbenchmarks that don't call Run in sequence in a single benchmark.
-func Benchmark(f func(b *B)) BenchmarkResult {
-	b := &B{
-		benchFunc: f,
-		benchTime: benchTime,
-	}
-	if b.run1() {
-		b.run()
-	}
-	return b.result
-}
@@ -1,55 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package testing_test
-
-import (
-	"testing"
-)
-
-var buf = make([]byte, 13579)
-
-func NonASCII(b []byte, i int, offset int) int {
-	for i = offset; i < len(b)+offset; i++ {
-		if b[i%len(b)] >= 0x80 {
-			break
-		}
-	}
-	return i
-}
-
-func BenchmarkFastNonASCII(b *testing.B) {
-	var val int
-	for i := 0; i < b.N; i++ {
-		val += NonASCII(buf, 0, 0)
-	}
-}
-
-func BenchmarkSlowNonASCII(b *testing.B) {
-	var val int
-	for i := 0; i < b.N; i++ {
-		val += NonASCII(buf, 0, 0)
-		val += NonASCII(buf, 0, 1)
-	}
-}
-
-// TestBenchmark simply uses Benchmark twice and makes sure it does not crash.
-func TestBenchmark(t *testing.T) {
-	// FIXME: reduce runtime from the current 3 seconds.
-	rslow := testing.Benchmark(BenchmarkSlowNonASCII)
-	rfast := testing.Benchmark(BenchmarkFastNonASCII)
-	tslow := rslow.NsPerOp()
-	tfast := rfast.NsPerOp()
-
-	// Be exceedingly forgiving; do not fail even if system gets busy.
-	speedup := float64(tslow) / float64(tfast)
-	if speedup < 0.3 {
-		t.Errorf("Expected speedup >= 0.3, got %f", speedup)
-	}
-}
-
-func BenchmarkSub(b *testing.B) {
-	b.Run("Fast", func(b *testing.B) { BenchmarkFastNonASCII(b) })
-	b.Run("Slow", func(b *testing.B) { BenchmarkSlowNonASCII(b) })
-}
@@ -1,6 +0,0 @@
-package testing
-
-/*
- This is a sad stub of the upstream testing package because it doesn't compile
- with tinygo right now.
-*/
@@ -1,143 +0,0 @@
-package testing
-
-import (
-	"errors"
-	"fmt"
-	"reflect"
-	"time"
-)
-
-// InternalFuzzTarget is an internal type but exported because it is
-// cross-package; it is part of the implementation of the "go test" command.
-type InternalFuzzTarget struct {
-	Name string
-	Fn   func(f *F)
-}
-
-// F is a type passed to fuzz tests.
-//
-// Fuzz tests run generated inputs against a provided fuzz target, which can
-// find and report potential bugs in the code being tested.
-//
-// A fuzz test runs the seed corpus by default, which includes entries provided
-// by (*F).Add and entries in the testdata/fuzz/<FuzzTestName> directory. After
-// any necessary setup and calls to (*F).Add, the fuzz test must then call
-// (*F).Fuzz to provide the fuzz target. See the testing package documentation
-// for an example, and see the F.Fuzz and F.Add method documentation for
-// details.
-//
-// *F methods can only be called before (*F).Fuzz. Once the test is
-// executing the fuzz target, only (*T) methods can be used. The only *F methods
-// that are allowed in the (*F).Fuzz function are (*F).Failed and (*F).Name.
-type F struct {
-	common
-	fuzzContext *fuzzContext
-	testContext *testContext
-
-	// inFuzzFn is true when the fuzz function is running. Most F methods cannot
-	// be called when inFuzzFn is true.
-	inFuzzFn bool
-
-	// corpus is a set of seed corpus entries, added with F.Add and loaded
-	// from testdata.
-	corpus []corpusEntry
-
-	result     fuzzResult
-	fuzzCalled bool
-}
-
-// corpusEntry is an alias to the same type as internal/fuzz.CorpusEntry.
-// We use a type alias because we don't want to export this type, and we can't
-// import internal/fuzz from testing.
-type corpusEntry = struct {
-	Parent     string
-	Path       string
-	Data       []byte
-	Values     []interface{}
-	Generation int
-	IsSeed     bool
-}
-
-// Add will add the arguments to the seed corpus for the fuzz test. This will be
-// a no-op if called after or within the fuzz target, and args must match the
-// arguments for the fuzz target.
-func (f *F) Add(args ...interface{}) {
-	var values []interface{}
-	for i := range args {
-		if t := reflect.TypeOf(args[i]); !supportedTypes[t] {
-			panic(fmt.Sprintf("testing: unsupported type to Add %v", t))
-		}
-		values = append(values, args[i])
-	}
-	f.corpus = append(f.corpus, corpusEntry{Values: values, IsSeed: true, Path: fmt.Sprintf("seed#%d", len(f.corpus))})
-}
-
-// supportedTypes represents all of the supported types which can be fuzzed.
-var supportedTypes = map[reflect.Type]bool{
-	reflect.TypeOf(([]byte)("")):  true,
-	reflect.TypeOf((string)("")):  true,
-	reflect.TypeOf((bool)(false)): true,
-	reflect.TypeOf((byte)(0)):     true,
-	reflect.TypeOf((rune)(0)):     true,
-	reflect.TypeOf((float32)(0)):  true,
-	reflect.TypeOf((float64)(0)):  true,
-	reflect.TypeOf((int)(0)):      true,
-	reflect.TypeOf((int8)(0)):     true,
-	reflect.TypeOf((int16)(0)):    true,
-	reflect.TypeOf((int32)(0)):    true,
-	reflect.TypeOf((int64)(0)):    true,
-	reflect.TypeOf((uint)(0)):     true,
-	reflect.TypeOf((uint8)(0)):    true,
-	reflect.TypeOf((uint16)(0)):   true,
-	reflect.TypeOf((uint32)(0)):   true,
-	reflect.TypeOf((uint64)(0)):   true,
-}
-
-// Fuzz runs the fuzz function, ff, for fuzz testing. If ff fails for a set of
-// arguments, those arguments will be added to the seed corpus.
-//
-// ff must be a function with no return value whose first argument is *T and
-// whose remaining arguments are the types to be fuzzed.
-// For example:
-//
-//	f.Fuzz(func(t *testing.T, b []byte, i int) { ... })
-//
-// The following types are allowed: []byte, string, bool, byte, rune, float32,
-// float64, int, int8, int16, int32, int64, uint, uint8, uint16, uint32, uint64.
-// More types may be supported in the future.
-//
-// ff must not call any *F methods, e.g. (*F).Log, (*F).Error, (*F).Skip. Use
-// the corresponding *T method instead. The only *F methods that are allowed in
-// the (*F).Fuzz function are (*F).Failed and (*F).Name.
-//
-// This function should be fast and deterministic, and its behavior should not
-// depend on shared state. No mutatable input arguments, or pointers to them,
-// should be retained between executions of the fuzz function, as the memory
-// backing them may be mutated during a subsequent invocation. ff must not
-// modify the underlying data of the arguments provided by the fuzzing engine.
-//
-// When fuzzing, F.Fuzz does not return until a problem is found, time runs out
-// (set with -fuzztime), or the test process is interrupted by a signal. F.Fuzz
-// should be called exactly once, unless F.Skip or F.Fail is called beforehand.
-func (f *F) Fuzz(ff interface{}) {
-	f.failed = true
-	f.result.N = 0
-	f.result.T = 0
-	f.result.Error = errors.New("operation not implemented")
-	return
-}
-
-// fuzzContext holds fields common to all fuzz tests.
-type fuzzContext struct {
-	deps testDeps
-	mode fuzzMode
-}
-
-type fuzzMode uint8
-
-// fuzzResult contains the results of a fuzz run.
-type fuzzResult struct {
-	N     int           // The number of iterations.
-	T     time.Duration // The total time taken.
-	Error error         // Error is the error from the failing input
-}
@@ -1,9 +0,0 @@
-// Copyright 2016 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-//
-//go:build baremetal
-
-package testing
-
-const isBaremetal = true
@@ -1,9 +0,0 @@
-// Copyright 2016 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-//
-//go:build !baremetal
-
-package testing
-
-const isBaremetal = false
@@ -1,323 +0,0 @@
-// Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package testing
-
-import (
-	"fmt"
-	"os"
-	"strconv"
-	"strings"
-	"sync"
-)
-
-// matcher sanitizes, uniques, and filters names of subtests and subbenchmarks.
-type matcher struct {
-	filter    filterMatch
-	skip      filterMatch
-	matchFunc func(pat, str string) (bool, error)
-
-	mu sync.Mutex
-
-	// subNames is used to deduplicate subtest names.
-	// Each key is the subtest name joined to the deduplicated name of the parent test.
-	// Each value is the count of the number of occurrences of the given subtest name
-	// already seen.
-	subNames map[string]int32
-}
-
-type filterMatch interface {
-	// matches checks the name against the receiver's pattern strings using the
-	// given match function.
-	matches(name []string, matchString func(pat, str string) (bool, error)) (ok, partial bool)
-
-	// verify checks that the receiver's pattern strings are valid filters by
-	// calling the given match function.
-	verify(name string, matchString func(pat, str string) (bool, error)) error
-}
-
-// simpleMatch matches a test name if all of the pattern strings match in
-// sequence.
-type simpleMatch []string
-
-// alternationMatch matches a test name if one of the alternations match.
-type alternationMatch []filterMatch
-
-// TODO: fix test_main to avoid race and improve caching, also allowing to
-// eliminate this Mutex.
-var matchMutex sync.Mutex
-
-func allMatcher() *matcher {
-	return newMatcher(nil, "", "", "")
-}
-
-func newMatcher(matchString func(pat, str string) (bool, error), patterns, name, skips string) *matcher {
-	if isBaremetal {
-		matchString = fakeMatchString
-	}
-
-	var filter, skip filterMatch
-	if patterns == "" {
-		filter = simpleMatch{} // always partial true
-	} else {
-		filter = splitRegexp(patterns)
-		if err := filter.verify(name, matchString); err != nil {
-			fmt.Fprintf(os.Stderr, "testing: invalid regexp for %s\n", err)
-			os.Exit(1)
-		}
-	}
-	if skips == "" {
-		skip = alternationMatch{} // always false
-	} else {
-		skip = splitRegexp(skips)
-		if err := skip.verify("-test.skip", matchString); err != nil {
-			fmt.Fprintf(os.Stderr, "testing: invalid regexp for %v\n", err)
-			os.Exit(1)
-		}
-	}
-	return &matcher{
-		filter:    filter,
-		skip:      skip,
-		matchFunc: matchString,
-		subNames:  map[string]int32{},
-	}
-}
-
-func (m *matcher) fullName(c *common, subname string) (name string, ok, partial bool) {
-	name = subname
-
-	m.mu.Lock()
-	defer m.mu.Unlock()
-
-	if c != nil && c.level > 0 {
-		name = m.unique(c.name, rewrite(subname))
-	}
-
-	matchMutex.Lock()
-	defer matchMutex.Unlock()
-
-	// We check the full array of paths each time to allow for the case that a pattern contains a '/'.
-	elem := strings.Split(name, "/")
-
-	// filter must match.
-	// accept partial match that may produce full match later.
-	ok, partial = m.filter.matches(elem, m.matchFunc)
-	if !ok {
-		return name, false, false
-	}
-
-	// skip must not match.
-	// ignore partial match so we can get to more precise match later.
-	skip, partialSkip := m.skip.matches(elem, m.matchFunc)
-	if skip && !partialSkip {
-		return name, false, false
-	}
-
-	return name, ok, partial
-}
-
-// clearSubNames clears the matcher's internal state, potentially freeing
-// memory. After this is called, T.Name may return the same strings as it did
-// for earlier subtests.
-func (m *matcher) clearSubNames() {
-	m.mu.Lock()
-	defer m.mu.Unlock()
-	for key := range m.subNames {
-		delete(m.subNames, key)
-	}
-}
-
-func (m simpleMatch) matches(name []string, matchString func(pat, str string) (bool, error)) (ok, partial bool) {
-	for i, s := range name {
-		if i >= len(m) {
-			break
-		}
-		if ok, _ := matchString(m[i], s); !ok {
-			return false, false
-		}
-	}
-	return true, len(name) < len(m)
-}
-
-func (m simpleMatch) verify(name string, matchString func(pat, str string) (bool, error)) error {
-	for i, s := range m {
-		m[i] = rewrite(s)
-	}
-	// Verify filters before doing any processing.
-	for i, s := range m {
-		if _, err := matchString(s, "non-empty"); err != nil {
-			return fmt.Errorf("element %d of %s (%q): %s", i, name, s, err)
-		}
-	}
-	return nil
-}
-
-func (m alternationMatch) matches(name []string, matchString func(pat, str string) (bool, error)) (ok, partial bool) {
-	for _, m := range m {
-		if ok, partial = m.matches(name, matchString); ok {
-			return ok, partial
-		}
-	}
-	return false, false
-}
-
-func (m alternationMatch) verify(name string, matchString func(pat, str string) (bool, error)) error {
-	for i, m := range m {
-		if err := m.verify(name, matchString); err != nil {
-			return fmt.Errorf("alternation %d of %s", i, err)
-		}
-	}
-	return nil
-}
-
-func splitRegexp(s string) filterMatch {
-	a := make(simpleMatch, 0, strings.Count(s, "/"))
-	b := make(alternationMatch, 0, strings.Count(s, "|"))
-	cs := 0
-	cp := 0
-	for i := 0; i < len(s); {
-		switch s[i] {
-		case '[':
-			cs++
-		case ']':
-			if cs--; cs < 0 { // An unmatched ']' is legal.
-				cs = 0
-			}
-		case '(':
-			if cs == 0 {
-				cp++
-			}
-		case ')':
-			if cs == 0 {
-				cp--
-			}
-		case '\\':
-			i++
-		case '/':
-			if cs == 0 && cp == 0 {
-				a = append(a, s[:i])
-				s = s[i+1:]
-				i = 0
-				continue
-			}
-		case '|':
-			if cs == 0 && cp == 0 {
-				a = append(a, s[:i])
-				s = s[i+1:]
-				i = 0
-				b = append(b, a)
-				a = make(simpleMatch, 0, len(a))
-				continue
-			}
-		}
-		i++
-	}
-
-	a = append(a, s)
-	if len(b) == 0 {
-		return a
-	}
-	return append(b, a)
-}
-
-// unique creates a unique name for the given parent and subname by affixing it
-// with one or more counts, if necessary.
-func (m *matcher) unique(parent, subname string) string {
-	base := parent + "/" + subname
-
-	for {
-		n := m.subNames[base]
-		if n < 0 {
-			panic("subtest count overflow")
-		}
-		m.subNames[base] = n + 1
-
-		if n == 0 && subname != "" {
-			prefix, nn := parseSubtestNumber(base)
-			if len(prefix) < len(base) && nn < m.subNames[prefix] {
-				// This test is explicitly named like "parent/subname#NN",
-				// and #NN was already used for the NNth occurrence of "parent/subname".
-				// Loop to add a disambiguating suffix.
-				continue
-			}
-			return base
-		}
-
-		name := fmt.Sprintf("%s#%02d", base, n)
-		if m.subNames[name] != 0 {
-			// This is the nth occurrence of base, but the name "parent/subname#NN"
-			// collides with the first occurrence of a subtest *explicitly* named
-			// "parent/subname#NN". Try the next number.
-			continue
-		}
-
-		return name
-	}
-}
-
-// parseSubtestNumber splits a subtest name into a "#%02d"-formatted int32
-// suffix (if present), and a prefix preceding that suffix (always).
-func parseSubtestNumber(s string) (prefix string, nn int32) {
-	i := strings.LastIndex(s, "#")
-	if i < 0 {
-		return s, 0
-	}
-
-	prefix, suffix := s[:i], s[i+1:]
-	if len(suffix) < 2 || (len(suffix) > 2 && suffix[0] == '0') {
-		// Even if suffix is numeric, it is not a possible output of a "%02" format
-		// string: it has either too few digits or too many leading zeroes.
-		return s, 0
-	}
-	if suffix == "00" {
-		if !strings.HasSuffix(prefix, "/") {
-			// We only use "#00" as a suffix for subtests named with the empty
-			// string — it isn't a valid suffix if the subtest name is non-empty.
-			return s, 0
-		}
-	}
-
-	n, err := strconv.ParseInt(suffix, 10, 32)
-	if err != nil || n < 0 {
-		return s, 0
-	}
-	return prefix, int32(n)
-}
-
-// rewrite rewrites a subname to having only printable characters and no white
-// space.
-func rewrite(s string) string {
-	b := []byte{}
-	for _, r := range s {
-		switch {
-		case isSpace(r):
-			b = append(b, '_')
-		case !strconv.IsPrint(r):
-			s := strconv.QuoteRune(r)
-			b = append(b, s[1:len(s)-1]...)
-		default:
-			b = append(b, string(r)...)
-		}
-	}
-	return string(b)
-}
-
-func isSpace(r rune) bool {
-	if r < 0x2000 {
-		switch r {
-		// Note: not the same as Unicode Z class.
-		case '\t', '\n', '\v', '\f', '\r', ' ', 0x85, 0xA0, 0x1680:
-			return true
-		}
-	} else {
-		if r <= 0x200a {
-			return true
-		}
-		switch r {
-		case 0x2028, 0x2029, 0x202f, 0x205f, 0x3000:
-			return true
-		}
-	}
-	return false
-}
@@ -1,259 +0,0 @@
-// Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package testing
-
-import (
-	"fmt"
-	"reflect"
-	"regexp"
-	"strings"
-	"unicode"
-)
-
-// Verify that our IsSpace agrees with unicode.IsSpace.
-func TestIsSpace(t *T) {
-	n := 0
-	for r := rune(0); r <= unicode.MaxRune; r++ {
-		if isSpace(r) != unicode.IsSpace(r) {
-			t.Errorf("IsSpace(%U)=%t incorrect", r, isSpace(r))
-			n++
-			if n > 10 {
-				return
-			}
-		}
-	}
-}
-
-func TestSplitRegexp(t *T) {
-	res := func(s ...string) filterMatch { return simpleMatch(s) }
-	alt := func(m ...filterMatch) filterMatch { return alternationMatch(m) }
-	testCases := []struct {
-		pattern string
-		result  filterMatch
-	}{
-		// Correct patterns
-		// If a regexp pattern is correct, all split regexps need to be correct
-		// as well.
-		{"", res("")},
-		{"/", res("", "")},
-		{"//", res("", "", "")},
-		{"A", res("A")},
-		{"A/B", res("A", "B")},
-		{"A/B/", res("A", "B", "")},
-		{"/A/B/", res("", "A", "B", "")},
-		{"[A]/(B)", res("[A]", "(B)")},
-		{"[/]/[/]", res("[/]", "[/]")},
-		{"[/]/[:/]", res("[/]", "[:/]")},
-		{"/]", res("", "]")},
-		{"]/", res("]", "")},
-		{"]/[/]", res("]", "[/]")},
-		{`([)/][(])`, res(`([)/][(])`)},
-		{"[(]/[)]", res("[(]", "[)]")},
-
-		{"A/B|C/D", alt(res("A", "B"), res("C", "D"))},
-
-		// Faulty patterns
-		// Errors in original should produce at least one faulty regexp in results.
-		{")/", res(")/")},
-		{")/(/)", res(")/(", ")")},
-		{"a[/)b", res("a[/)b")},
-		{"(/]", res("(/]")},
-		{"(/", res("(/")},
-		{"[/]/[/", res("[/]", "[/")},
-		{`\p{/}`, res(`\p{`, "}")},
-		{`\p/`, res(`\p`, "")},
-		{`[[:/:]]`, res(`[[:/:]]`)},
-	}
-	for _, tc := range testCases {
-		a := splitRegexp(tc.pattern)
-		if !reflect.DeepEqual(a, tc.result) {
-			t.Errorf("splitRegexp(%q) = %#v; want %#v", tc.pattern, a, tc.result)
-		}
-
-		// If there is any error in the pattern, one of the returned subpatterns
-		// needs to have an error as well.
-		if _, err := regexp.Compile(tc.pattern); err != nil {
-			ok := true
-			if err := a.verify("", regexp.MatchString); err != nil {
-				ok = false
-			}
-			if ok {
-				t.Errorf("%s: expected error in any of %q", tc.pattern, a)
-			}
-		}
-	}
-}
-
-func TestMatcher(t *T) {
-	testCases := []struct {
-		pattern     string
-		skip        string
-		parent, sub string
-		ok          bool
-		partial     bool
-	}{
-		// Behavior without subtests.
-		{"", "", "", "TestFoo", true, false},
-		{"TestFoo", "", "", "TestFoo", true, false},
-		{"TestFoo/", "", "", "TestFoo", true, true},
-		{"TestFoo/bar/baz", "", "", "TestFoo", true, true},
-		{"TestFoo", "", "", "TestBar", false, false},
-		{"TestFoo/", "", "", "TestBar", false, false},
-		{"TestFoo/bar/baz", "", "", "TestBar/bar/baz", false, false},
-		{"", "TestBar", "", "TestFoo", true, false},
-		{"", "TestBar", "", "TestBar", false, false},
-
-		// Skipping a non-existent test doesn't change anything.
-		{"", "TestFoo/skipped", "", "TestFoo", true, false},
-		{"TestFoo", "TestFoo/skipped", "", "TestFoo", true, false},
-		{"TestFoo/", "TestFoo/skipped", "", "TestFoo", true, true},
-		{"TestFoo/bar/baz", "TestFoo/skipped", "", "TestFoo", true, true},
-		{"TestFoo", "TestFoo/skipped", "", "TestBar", false, false},
-		{"TestFoo/", "TestFoo/skipped", "", "TestBar", false, false},
-		{"TestFoo/bar/baz", "TestFoo/skipped", "", "TestBar/bar/baz", false, false},
-
-		// with subtests
-		{"", "", "TestFoo", "x", true, false},
-		{"TestFoo", "", "TestFoo", "x", true, false},
-		{"TestFoo/", "", "TestFoo", "x", true, false},
-		{"TestFoo/bar/baz", "", "TestFoo", "bar", true, true},
-
-		{"", "TestFoo/skipped", "TestFoo", "x", true, false},
-		{"TestFoo", "TestFoo/skipped", "TestFoo", "x", true, false},
-		{"TestFoo", "TestFoo/skipped", "TestFoo", "skipped", false, false},
-		{"TestFoo/", "TestFoo/skipped", "TestFoo", "x", true, false},
-		{"TestFoo/bar/baz", "TestFoo/skipped", "TestFoo", "bar", true, true},
-
-		// Subtest with a '/' in its name still allows for copy and pasted names
-		// to match.
-		{"TestFoo/bar/baz", "", "TestFoo", "bar/baz", true, false},
-		{"TestFoo/bar/baz", "TestFoo/bar/baz", "TestFoo", "bar/baz", false, false},
-		{"TestFoo/bar/baz", "TestFoo/bar/baz/skip", "TestFoo", "bar/baz", true, false},
-		{"TestFoo/bar/baz", "", "TestFoo/bar", "baz", true, false},
-		{"TestFoo/bar/baz", "", "TestFoo", "x", false, false},
-		{"TestFoo", "", "TestBar", "x", false, false},
-		{"TestFoo/", "", "TestBar", "x", false, false},
-		{"TestFoo/bar/baz", "", "TestBar", "x/bar/baz", false, false},
-
-		{"A/B|C/D", "", "TestA", "B", true, false},
-		{"A/B|C/D", "", "TestC", "D", true, false},
-		{"A/B|C/D", "", "TestA", "C", false, false},
-
-		// subtests only
-		{"", "", "TestFoo", "x", true, false},
-		{"/", "", "TestFoo", "x", true, false},
-		{"./", "", "TestFoo", "x", true, false},
-		{"./.", "", "TestFoo", "x", true, false},
-		{"/bar/baz", "", "TestFoo", "bar", true, true},
-		{"/bar/baz", "", "TestFoo", "bar/baz", true, false},
-		{"//baz", "", "TestFoo", "bar/baz", true, false},
-		{"//", "", "TestFoo", "bar/baz", true, false},
-		{"/bar/baz", "", "TestFoo/bar", "baz", true, false},
-		{"//foo", "", "TestFoo", "bar/baz", false, false},
-		{"/bar/baz", "", "TestFoo", "x", false, false},
-		{"/bar/baz", "", "TestBar", "x/bar/baz", false, false},
-	}
-
-	for _, tc := range testCases {
-		m := newMatcher(regexp.MatchString, tc.pattern, "-test.run", tc.skip)
-
-		parent := &common{name: tc.parent}
-		if tc.parent != "" {
-			parent.level = 1
-		}
-		if n, ok, partial := m.fullName(parent, tc.sub); ok != tc.ok || partial != tc.partial {
-			t.Errorf("for pattern %q, fullName(parent=%q, sub=%q) = %q, ok %v partial %v; want ok %v partial %v",
-				tc.pattern, tc.parent, tc.sub, n, ok, partial, tc.ok, tc.partial)
-		}
-	}
-}
-
-var namingTestCases = []struct{ name, want string }{
-	// Uniqueness
-	{"", "x/#00"},
-	{"", "x/#01"},
-	{"#0", "x/#0"},      // Doesn't conflict with #00 because the number of digits differs.
-	{"#00", "x/#00#01"}, // Conflicts with implicit #00 (used above), so add a suffix.
-	{"#", "x/#"},
-	{"#", "x/##01"},
-
-	{"t", "x/t"},
-	{"t", "x/t#01"},
-	{"t", "x/t#02"},
-	{"t#00", "x/t#00"}, // Explicit "#00" doesn't conflict with the unsuffixed first subtest.
-
-	{"a#01", "x/a#01"},    // user has subtest with this name.
-	{"a", "x/a"},          // doesn't conflict with this name.
-	{"a", "x/a#02"},       // This string is claimed now, so resume
-	{"a", "x/a#03"},       // with counting.
-	{"a#02", "x/a#02#01"}, // We already used a#02 once, so add a suffix.
-
-	{"b#00", "x/b#00"},
-	{"b", "x/b"}, // Implicit 0 doesn't conflict with explicit "#00".
-	{"b", "x/b#01"},
-	{"b#9223372036854775807", "x/b#9223372036854775807"}, // MaxInt64
-	{"b", "x/b#02"},
-	{"b", "x/b#03"},
-
-	// Sanitizing
-	{"A:1 B:2", "x/A:1_B:2"},
-	{"s\t\r\u00a0", "x/s___"},
-	{"\x01", `x/\x01`},
-	{"\U0010ffff", `x/\U0010ffff`},
-}
-
-func TestNaming(t *T) {
-	m := newMatcher(regexp.MatchString, "", "", "")
-	parent := &common{name: "x", level: 1} // top-level test.
-
-	for i, tc := range namingTestCases {
-		if got, _, _ := m.fullName(parent, tc.name); got != tc.want {
-			t.Errorf("%d:%s: got %q; want %q", i, tc.name, got, tc.want)
-		}
-	}
-}
-
-func FuzzNaming(f *F) {
-	for _, tc := range namingTestCases {
-		f.Add(tc.name)
-	}
-	parent := &common{name: "x", level: 1}
-	var m *matcher
-	var seen map[string]string
-	reset := func() {
-		m = allMatcher()
-		seen = make(map[string]string)
-	}
-	reset()
-
-	f.Fuzz(func(t *T, subname string) {
-		if len(subname) > 10 {
-			// Long names attract the OOM killer.
-			t.Skip()
-		}
-		name := m.unique(parent.name, subname)
-		if !strings.Contains(name, "/"+subname) {
-			t.Errorf("name %q does not contain subname %q", name, subname)
-		}
-		if prev, ok := seen[name]; ok {
-			t.Errorf("name %q generated by both %q and %q", name, prev, subname)
-		}
-		if len(seen) > 1e6 {
-			// Free up memory.
-			reset()
-		}
-		seen[name] = subname
-	})
-}
-
-// GoString returns a string that is more readable than the default, which makes
-// it easier to read test errors.
-func (m alternationMatch) GoString() string {
-	s := make([]string, len(m))
-	for i, m := range m {
-		s[i] = fmt.Sprintf("%#v", m)
-	}
-	return fmt.Sprintf("(%s)", strings.Join(s, " | "))
-}
@@ -1,80 +0,0 @@
-// Copyright 2016 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package testing
-
-import (
-	"reflect"
-)
-
-func TestCleanup(t *T) {
-	var cleanups []int
-	t.Run("test", func(t *T) {
-		t.Cleanup(func() { cleanups = append(cleanups, 1) })
-		t.Cleanup(func() { cleanups = append(cleanups, 2) })
-	})
-	if got, want := cleanups, []int{2, 1}; !reflect.DeepEqual(got, want) {
-		t.Errorf("unexpected cleanup record; got %v want %v", got, want)
-	}
-}
-
-func TestRunCleanup(t *T) {
-	outerCleanup := 0
-	innerCleanup := 0
-	t.Run("test", func(t *T) {
-		t.Cleanup(func() { outerCleanup++ })
-		t.Run("x", func(t *T) {
-			t.Cleanup(func() { innerCleanup++ })
-		})
-	})
-	if innerCleanup != 1 {
-		t.Errorf("unexpected inner cleanup count; got %d want 1", innerCleanup)
-	}
-	if outerCleanup != 1 {
-		t.Errorf("unexpected outer cleanup count; got %d want 1", outerCleanup) // wrong upstream!
-	}
-}
-
-func TestCleanupParallelSubtests(t *T) {
-	ranCleanup := 0
-	t.Run("test", func(t *T) {
-		t.Cleanup(func() { ranCleanup++ })
-		t.Run("x", func(t *T) {
-			t.Parallel()
-			if ranCleanup > 0 {
-				t.Error("outer cleanup ran before parallel subtest")
-			}
-		})
-	})
-	if ranCleanup != 1 {
-		t.Errorf("unexpected cleanup count; got %d want 1", ranCleanup)
-	}
-}
-
-func TestNestedCleanup(t *T) {
-	ranCleanup := 0
-	t.Run("test", func(t *T) {
-		t.Cleanup(func() {
-			if ranCleanup != 2 {
-				t.Errorf("unexpected cleanup count in first cleanup: got %d want 2", ranCleanup)
-			}
-			ranCleanup++
-		})
-		t.Cleanup(func() {
-			if ranCleanup != 0 {
-				t.Errorf("unexpected cleanup count in second cleanup: got %d want 0", ranCleanup)
-			}
-			ranCleanup++
-			t.Cleanup(func() {
-				if ranCleanup != 1 {
-					t.Errorf("unexpected cleanup count in nested cleanup: got %d want 1", ranCleanup)
-				}
-				ranCleanup++
-			})
-		})
-	})
-	if ranCleanup != 3 {
-		t.Errorf("unexpected cleanup count: got %d want 3", ranCleanup)
-	}
-}
@@ -1,709 +0,0 @@
-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-//
-// This file has been modified for use by the TinyGo compiler.
-// src: https://github.com/golang/go/blob/61bb56ad/src/testing/testing.go
-
-// Package testing provides support for automated testing of Go packages.
-package testing
-
-import (
-	"bytes"
-	"context"
-	"errors"
-	"flag"
-	"fmt"
-	"io"
-	"io/fs"
-	"math/rand"
-	"os"
-	"path/filepath"
-	"runtime"
-	"strconv"
-	"strings"
-	"time"
-	"unicode"
-	"unicode/utf8"
-)
-
-// Testing flags.
-var (
-	flagVerbose    bool
-	flagShort      bool
-	flagRunRegexp  string
-	flagSkipRegexp string
-	flagShuffle    string
-	flagCount      int
-)
-
-var initRan bool
-
-// Init registers testing flags. It has no effect if it has already run.
-func Init() {
-	if initRan {
-		return
-	}
-	initRan = true
-
-	flag.BoolVar(&flagVerbose, "test.v", false, "verbose: print additional output")
-	flag.BoolVar(&flagShort, "test.short", false, "short: run smaller test suite to save time")
-	flag.StringVar(&flagRunRegexp, "test.run", "", "run: regexp of tests to run")
-	flag.StringVar(&flagSkipRegexp, "test.skip", "", "skip: regexp of tests to run")
-	flag.StringVar(&flagShuffle, "test.shuffle", "off", "shuffle: off, on, <numeric-seed>")
-
-	flag.IntVar(&flagCount, "test.count", 1, "run each test or benchmark `count` times")
-
-	initBenchmarkFlags()
-}
-
-// common holds the elements common between T and B and
-// captures common methods such as Errorf.
-type common struct {
-	output   *logger
-	indent   string
-	ran      bool     // Test or benchmark (or one of its subtests) was executed.
-	failed   bool     // Test or benchmark has failed.
-	skipped  bool     // Test of benchmark has been skipped.
-	cleanups []func() // optional functions to be called at the end of the test
-	finished bool     // Test function has completed.
-
-	hasSub bool // TODO: should be atomic
-
-	parent   *common
-	level    int       // Nesting depth of test or benchmark.
-	name     string    // Name of test or benchmark.
-	start    time.Time // Time test or benchmark started
-	duration time.Duration
-
-	tempDir    string
-	tempDirErr error
-	tempDirSeq int32
-
-	ctx       context.Context
-	cancelCtx context.CancelFunc
-}
-
-type logger struct {
-	logToStdout bool
-	b           bytes.Buffer
-}
-
-func (l *logger) Write(p []byte) (int, error) {
-	if l.logToStdout {
-		return os.Stdout.Write(p)
-	}
-	return l.b.Write(p)
-}
-
-func (l *logger) WriteTo(w io.Writer) (int64, error) {
-	if l.logToStdout {
-		// We've already been logging to stdout; nothing to do.
-		return 0, nil
-	}
-	return l.b.WriteTo(w)
-
-}
-
-func (l *logger) Len() int {
-	return l.b.Len()
-}
-
-// Short reports whether the -test.short flag is set.
-func Short() bool {
-	return flagShort
-}
-
-// CoverMode reports what the test coverage mode is set to.
-//
-// Test coverage is not supported; this returns the empty string.
-func CoverMode() string {
-	return ""
-}
-
-// Verbose reports whether the -test.v flag is set.
-func Verbose() bool {
-	return flagVerbose
-}
-
-// String constant that is being set when running a test.
-var testBinary string
-
-// Testing returns whether the program was compiled as a test, using "tinygo
-// test". It returns false when built using "tinygo build", "tinygo flash", etc.
-func Testing() bool {
-	return testBinary == "1"
-}
-
-// flushToParent writes c.output to the parent after first writing the header
-// with the given format and arguments.
-func (c *common) flushToParent(testName, format string, args ...interface{}) {
-	if c.parent == nil {
-		// The fake top-level test doesn't want a FAIL or PASS banner.
-		// Not quite sure how this works upstream.
-		c.output.WriteTo(os.Stdout)
-	} else {
-		fmt.Fprintf(c.parent.output, format, args...)
-		c.output.WriteTo(c.parent.output)
-	}
-}
-
-// fmtDuration returns a string representing d in the form "87.00s".
-func fmtDuration(d time.Duration) string {
-	return fmt.Sprintf("%.2fs", d.Seconds())
-}
-
-// TB is the interface common to T and B.
-type TB interface {
-	Cleanup(func())
-	Context() context.Context
-	Error(args ...interface{})
-	Errorf(format string, args ...interface{})
-	Fail()
-	FailNow()
-	Failed() bool
-	Fatal(args ...interface{})
-	Fatalf(format string, args ...interface{})
-	Helper()
-	Log(args ...interface{})
-	Logf(format string, args ...interface{})
-	Name() string
-	Setenv(key, value string)
-	Skip(args ...interface{})
-	SkipNow()
-	Skipf(format string, args ...interface{})
-	Skipped() bool
-	TempDir() string
-}
-
-var _ TB = (*T)(nil)
-var _ TB = (*B)(nil)
-
-// T is a type passed to Test functions to manage test state and support formatted test logs.
-// Logs are accumulated during execution and dumped to standard output when done.
-type T struct {
-	common
-	context *testContext // For running tests and subtests.
-}
-
-// Name returns the name of the running test or benchmark.
-func (c *common) Name() string {
-	return c.name
-}
-
-func (c *common) setRan() {
-	if c.parent != nil {
-		c.parent.setRan()
-	}
-	c.ran = true
-}
-
-// Fail marks the function as having failed but continues execution.
-func (c *common) Fail() {
-	c.failed = true
-}
-
-// Failed reports whether the function has failed.
-func (c *common) Failed() bool {
-	failed := c.failed
-	return failed
-}
-
-// FailNow marks the function as having failed and stops its execution
-// by calling runtime.Goexit (which then runs all deferred calls in the
-// current goroutine).
-func (c *common) FailNow() {
-	c.Fail()
-
-	c.finished = true
-	c.Error("FailNow is incomplete, requires runtime.Goexit()")
-}
-
-// log generates the output.
-func (c *common) log(s string) {
-	// This doesn't print the same as in upstream go, but works for now.
-	if len(s) != 0 && s[len(s)-1] == '\n' {
-		s = s[:len(s)-1]
-	}
-	lines := strings.Split(s, "\n")
-	// First line.
-	fmt.Fprintf(c.output, "%s    %s\n", c.indent, lines[0])
-	// More lines.
-	for _, line := range lines[1:] {
-		fmt.Fprintf(c.output, "%s        %s\n", c.indent, line)
-	}
-}
-
-// Log formats its arguments using default formatting, analogous to Println,
-// and records the text in the error log. For tests, the text will be printed only if
-// the test fails or the -test.v flag is set. For benchmarks, the text is always
-// printed to avoid having performance depend on the value of the -test.v flag.
-func (c *common) Log(args ...interface{}) { c.log(fmt.Sprintln(args...)) }
-
-// Logf formats its arguments according to the format, analogous to Printf, and
-// records the text in the error log. A final newline is added if not provided. For
-// tests, the text will be printed only if the test fails or the -test.v flag is
-// set. For benchmarks, the text is always printed to avoid having performance
-// depend on the value of the -test.v flag.
-func (c *common) Logf(format string, args ...interface{}) { c.log(fmt.Sprintf(format, args...)) }
-
-// Error is equivalent to Log followed by Fail.
-func (c *common) Error(args ...interface{}) {
-	c.log(fmt.Sprintln(args...))
-	c.Fail()
-}
-
-// Errorf is equivalent to Logf followed by Fail.
-func (c *common) Errorf(format string, args ...interface{}) {
-	c.log(fmt.Sprintf(format, args...))
-	c.Fail()
-}
-
-// Fatal is equivalent to Log followed by FailNow.
-func (c *common) Fatal(args ...interface{}) {
-	c.log(fmt.Sprintln(args...))
-	c.FailNow()
-}
-
-// Fatalf is equivalent to Logf followed by FailNow.
-func (c *common) Fatalf(format string, args ...interface{}) {
-	c.log(fmt.Sprintf(format, args...))
-	c.FailNow()
-}
-
-// Skip is equivalent to Log followed by SkipNow.
-func (c *common) Skip(args ...interface{}) {
-	c.log(fmt.Sprintln(args...))
-	c.SkipNow()
-}
-
-// Skipf is equivalent to Logf followed by SkipNow.
-func (c *common) Skipf(format string, args ...interface{}) {
-	c.log(fmt.Sprintf(format, args...))
-	c.SkipNow()
-}
-
-// SkipNow marks the test as having been skipped and stops its execution
-// by calling runtime.Goexit.
-func (c *common) SkipNow() {
-	c.skip()
-	c.finished = true
-	c.Error("SkipNow is incomplete, requires runtime.Goexit()")
-}
-
-func (c *common) skip() {
-	c.skipped = true
-}
-
-// Skipped reports whether the test was skipped.
-func (c *common) Skipped() bool {
-	return c.skipped
-}
-
-// Helper is not implemented, it is only provided for compatibility.
-func (c *common) Helper() {
-	// Unimplemented.
-}
-
-// Cleanup registers a function to be called when the test (or subtest) and all its
-// subtests complete. Cleanup functions will be called in last added,
-// first called order.
-func (c *common) Cleanup(f func()) {
-	c.cleanups = append(c.cleanups, f)
-}
-
-// Context returns a context that is canceled just before
-// Cleanup-registered functions are called.
-//
-// Cleanup functions can wait for any resources
-// that shut down on [context.Context.Done] before the test or benchmark completes.
-func (c *common) Context() context.Context {
-	return c.ctx
-}
-
-// TempDir returns a temporary directory for the test to use.
-// The directory is automatically removed by Cleanup when the test and
-// all its subtests complete.
-// Each subsequent call to t.TempDir returns a unique directory;
-// if the directory creation fails, TempDir terminates the test by calling Fatal.
-func (c *common) TempDir() string {
-	// Use a single parent directory for all the temporary directories
-	// created by a test, each numbered sequentially.
-	var nonExistent bool
-	if c.tempDir == "" { // Usually the case with js/wasm
-		nonExistent = true
-	} else {
-		_, err := os.Stat(c.tempDir)
-		nonExistent = errors.Is(err, fs.ErrNotExist)
-		if err != nil && !nonExistent {
-			c.Fatalf("TempDir: %v", err)
-		}
-	}
-
-	if nonExistent {
-		c.Helper()
-
-		// Drop unusual characters (such as path separators or
-		// characters interacting with globs) from the directory name to
-		// avoid surprising os.MkdirTemp behavior.
-		mapper := func(r rune) rune {
-			if r < utf8.RuneSelf {
-				const allowed = "!#$%&()+,-.=@^_{}~ "
-				if '0' <= r && r <= '9' ||
-					'a' <= r && r <= 'z' ||
-					'A' <= r && r <= 'Z' {
-					return r
-				}
-				if strings.ContainsRune(allowed, r) {
-					return r
-				}
-			} else if unicode.IsLetter(r) || unicode.IsNumber(r) {
-				return r
-			}
-			return -1
-		}
-		pattern := strings.Map(mapper, c.Name())
-		c.tempDir, c.tempDirErr = os.MkdirTemp("", pattern)
-		if c.tempDirErr == nil {
-			c.Cleanup(func() {
-				if err := os.RemoveAll(c.tempDir); err != nil {
-					c.Errorf("TempDir RemoveAll cleanup: %v", err)
-				}
-			})
-		}
-	}
-
-	if c.tempDirErr != nil {
-		c.Fatalf("TempDir: %v", c.tempDirErr)
-	}
-	seq := c.tempDirSeq
-	c.tempDirSeq++
-	dir := fmt.Sprintf("%s%c%03d", c.tempDir, os.PathSeparator, seq)
-	if err := os.Mkdir(dir, 0777); err != nil {
-		c.Fatalf("TempDir: %v", err)
-	}
-	return dir
-}
-
-// Setenv calls os.Setenv(key, value) and uses Cleanup to
-// restore the environment variable to its original value
-// after the test.
-func (c *common) Setenv(key, value string) {
-	prevValue, ok := os.LookupEnv(key)
-
-	if err := os.Setenv(key, value); err != nil {
-		c.Fatalf("cannot set environment variable: %v", err)
-	}
-
-	if ok {
-		c.Cleanup(func() {
-			os.Setenv(key, prevValue)
-		})
-	} else {
-		c.Cleanup(func() {
-			os.Unsetenv(key)
-		})
-	}
-}
-
-// Chdir calls os.Chdir(dir) and uses Cleanup to restore the current
-// working directory to its original value after the test. On Unix, it
-// also sets PWD environment variable for the duration of the test.
-//
-// Because Chdir affects the whole process, it cannot be used
-// in parallel tests or tests with parallel ancestors.
-func (c *common) Chdir(dir string) {
-	// Note: function copied from the Go 1.24.0 source tree.
-
-	oldwd, err := os.Open(".")
-	if err != nil {
-		c.Fatal(err)
-	}
-	if err := os.Chdir(dir); err != nil {
-		c.Fatal(err)
-	}
-	// On POSIX platforms, PWD represents “an absolute pathname of the
-	// current working directory.” Since we are changing the working
-	// directory, we should also set or update PWD to reflect that.
-	switch runtime.GOOS {
-	case "windows", "plan9":
-		// Windows and Plan 9 do not use the PWD variable.
-	default:
-		if !filepath.IsAbs(dir) {
-			dir, err = os.Getwd()
-			if err != nil {
-				c.Fatal(err)
-			}
-		}
-		c.Setenv("PWD", dir)
-	}
-	c.Cleanup(func() {
-		err := oldwd.Chdir()
-		oldwd.Close()
-		if err != nil {
-			// It's not safe to continue with tests if we can't
-			// get back to the original working directory. Since
-			// we are holding a dirfd, this is highly unlikely.
-			panic("testing.Chdir: " + err.Error())
-		}
-	})
-}
-
-// runCleanup is called at the end of the test.
-func (c *common) runCleanup() {
-	for {
-		var cleanup func()
-		if len(c.cleanups) > 0 {
-			last := len(c.cleanups) - 1
-			cleanup = c.cleanups[last]
-			c.cleanups = c.cleanups[:last]
-		}
-		if cleanup == nil {
-			return
-		}
-		if c.cancelCtx != nil {
-			c.cancelCtx()
-		}
-		cleanup()
-	}
-}
-
-// Parallel is not implemented, it is only provided for compatibility.
-func (t *T) Parallel() {
-	// Unimplemented.
-}
-
-// InternalTest is a reference to a test that should be called during a test suite run.
-type InternalTest struct {
-	Name string
-	F    func(*T)
-}
-
-func tRunner(t *T, fn func(t *T)) {
-	defer func() {
-		t.runCleanup()
-	}()
-
-	// Run the test.
-	t.start = time.Now()
-	fn(t)
-	t.duration += time.Since(t.start) // TODO: capture cleanup time, too.
-
-	t.report() // Report after all subtests have finished.
-	if t.parent != nil && !t.hasSub {
-		t.setRan()
-	}
-}
-
-// Run runs f as a subtest of t called name. It waits until the subtest is finished
-// and returns whether the subtest succeeded.
-func (t *T) Run(name string, f func(t *T)) bool {
-	t.hasSub = true
-	testName, ok, _ := t.context.match.fullName(&t.common, name)
-	if !ok {
-		return true
-	}
-
-	// Create a subtest.
-	ctx, cancelCtx := context.WithCancel(context.Background())
-	sub := T{
-		common: common{
-			output:    &logger{logToStdout: flagVerbose},
-			name:      testName,
-			parent:    &t.common,
-			level:     t.level + 1,
-			ctx:       ctx,
-			cancelCtx: cancelCtx,
-		},
-		context: t.context,
-	}
-	if t.level > 0 {
-		sub.indent = sub.indent + "    "
-	}
-	if flagVerbose {
-		fmt.Fprintf(t.output, "=== RUN   %s\n", sub.name)
-	}
-
-	tRunner(&sub, f)
-	return !sub.failed
-}
-
-// Deadline reports the time at which the test binary will have
-// exceeded the timeout specified by the -timeout flag.
-//
-// The ok result is false if the -timeout flag indicates “no timeout” (0).
-// For now tinygo always return 0, false.
-//
-// Not Implemented.
-func (t *T) Deadline() (deadline time.Time, ok bool) {
-	deadline = t.context.deadline
-	return deadline, !deadline.IsZero()
-}
-
-// testContext holds all fields that are common to all tests. This includes
-// synchronization primitives to run at most *parallel tests.
-type testContext struct {
-	match    *matcher
-	deadline time.Time
-}
-
-func newTestContext(m *matcher) *testContext {
-	return &testContext{
-		match: m,
-	}
-}
-
-// M is a test suite.
-type M struct {
-	// tests is a list of the test names to execute
-	Tests      []InternalTest
-	Benchmarks []InternalBenchmark
-
-	deps testDeps
-
-	// value to pass to os.Exit, the outer test func main
-	// harness calls os.Exit with this code. See #34129.
-	exitCode int
-}
-
-type testDeps interface {
-	MatchString(pat, str string) (bool, error)
-}
-
-func (m *M) shuffle() error {
-	var n int64
-
-	if flagShuffle == "on" {
-		n = time.Now().UnixNano()
-	} else {
-		var err error
-		n, err = strconv.ParseInt(flagShuffle, 10, 64)
-		if err != nil {
-			m.exitCode = 2
-			return fmt.Errorf(`testing: -shuffle should be "off", "on", or a valid integer: %v`, err)
-		}
-	}
-
-	fmt.Println("-test.shuffle", n)
-	rng := rand.New(rand.NewSource(n))
-	rng.Shuffle(len(m.Tests), func(i, j int) { m.Tests[i], m.Tests[j] = m.Tests[j], m.Tests[i] })
-	rng.Shuffle(len(m.Benchmarks), func(i, j int) { m.Benchmarks[i], m.Benchmarks[j] = m.Benchmarks[j], m.Benchmarks[i] })
-	return nil
-}
-
-// Run runs the tests. It returns an exit code to pass to os.Exit.
-func (m *M) Run() (code int) {
-	defer func() {
-		code = m.exitCode
-	}()
-
-	if !flag.Parsed() {
-		flag.Parse()
-	}
-
-	if flagShuffle != "off" {
-		if err := m.shuffle(); err != nil {
-			fmt.Fprintln(os.Stderr, err)
-			return
-		}
-	}
-
-	testRan, testOk := runTests(m.deps.MatchString, m.Tests)
-	if !testRan && *matchBenchmarks == "" {
-		fmt.Fprintln(os.Stderr, "testing: warning: no tests to run")
-	}
-	if !testOk || !runBenchmarks(m.deps.MatchString, m.Benchmarks) {
-		fmt.Println("FAIL")
-		m.exitCode = 1
-	} else {
-		fmt.Println("PASS")
-		m.exitCode = 0
-	}
-	return
-}
-
-func runTests(matchString func(pat, str string) (bool, error), tests []InternalTest) (ran, ok bool) {
-	ok = true
-
-	ctx := newTestContext(newMatcher(matchString, flagRunRegexp, "-test.run", flagSkipRegexp))
-	runCtx, cancelCtx := context.WithCancel(context.Background())
-	t := &T{
-		common: common{
-			output:    &logger{logToStdout: flagVerbose},
-			ctx:       runCtx,
-			cancelCtx: cancelCtx,
-		},
-		context: ctx,
-	}
-
-	for i := 0; i < flagCount; i++ {
-		tRunner(t, func(t *T) {
-			for _, test := range tests {
-				t.Run(test.Name, test.F)
-				ok = ok && !t.Failed()
-			}
-		})
-	}
-
-	return t.ran, ok
-}
-
-func (t *T) report() {
-	dstr := fmtDuration(t.duration)
-	format := t.indent + "--- %s: %s (%s)\n"
-	if t.Failed() {
-		if t.parent != nil {
-			t.parent.failed = true
-		}
-		t.flushToParent(t.name, format, "FAIL", t.name, dstr)
-	} else if flagVerbose {
-		if t.Skipped() {
-			t.flushToParent(t.name, format, "SKIP", t.name, dstr)
-		} else {
-			t.flushToParent(t.name, format, "PASS", t.name, dstr)
-		}
-	}
-}
-
-// AllocsPerRun returns the average number of allocations during calls to f.
-// Although the return value has type float64, it will always be an integral
-// value.
-//
-// Not implemented.
-func AllocsPerRun(runs int, f func()) (avg float64) {
-	f()
-	for i := 0; i < runs; i++ {
-		f()
-	}
-	return 0
-}
-
-type InternalExample struct {
-	Name      string
-	F         func()
-	Output    string
-	Unordered bool
-}
-
-// MainStart is meant for use by tests generated by 'go test'.
-// It is not meant to be called directly and is not subject to the Go 1 compatibility document.
-// It may change signature from release to release.
-func MainStart(deps interface{}, tests []InternalTest, benchmarks []InternalBenchmark, fuzzTargets []InternalFuzzTarget, examples []InternalExample) *M {
-	Init()
-	return &M{
-		Tests:      tests,
-		Benchmarks: benchmarks,
-		deps:       deps.(testDeps),
-	}
-}
-
-// A fake regexp matcher.
-// Inflexible, but saves 50KB of flash and 50KB of RAM per -size full,
-// and lets tests pass on cortex-m.
-func fakeMatchString(pat, str string) (bool, error) {
-	if pat == ".*" {
-		return true, nil
-	}
-	matched := strings.Contains(str, pat)
-	return matched, nil
-}
@@ -1,204 +0,0 @@
-//go:build !windows
-
-// TODO: implement readdir for windows, then enable this file
-
-// Copyright 2014 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package testing_test
-
-import (
-	"errors"
-	"io/fs"
-	"os"
-	"path/filepath"
-	"runtime"
-	"testing"
-)
-
-// This is exactly what a test would do without a TestMain.
-// It's here only so that there is at least one package in the
-// standard library with a TestMain, so that code is executed.
-
-func TestMain(m *testing.M) {
-	os.Exit(m.Run())
-}
-
-func TestTempDirInCleanup(t *testing.T) {
-	if runtime.GOOS == "wasip1" || runtime.GOOS == "wasip2" {
-		t.Log("Skipping.  TODO: implement RemoveAll for wasi")
-		return
-	}
-
-	var dir string
-
-	t.Run("test", func(t *testing.T) {
-		t.Cleanup(func() {
-			dir = t.TempDir()
-		})
-		_ = t.TempDir()
-	})
-
-	fi, err := os.Stat(dir)
-	if fi != nil {
-		t.Fatalf("Directory %q from user Cleanup still exists", dir)
-	}
-	if !errors.Is(err, fs.ErrNotExist) {
-		t.Fatalf("Unexpected error: %v", err)
-	}
-}
-
-func TestTempDirInBenchmark(t *testing.T) {
-	testing.Benchmark(func(b *testing.B) {
-		if !b.Run("test", func(b *testing.B) {
-			// Add a loop so that the test won't fail. See issue 38677.
-			for i := 0; i < b.N; i++ {
-				_ = b.TempDir()
-			}
-		}) {
-			t.Fatal("Sub test failure in a benchmark")
-		}
-	})
-}
-
-func TestTempDir(t *testing.T) {
-	if runtime.GOOS == "wasip1" || runtime.GOOS == "wasip2" {
-		t.Log("Skipping.  TODO: implement RemoveAll for wasi")
-		return
-	}
-
-	testTempDir(t)
-	t.Run("InSubtest", testTempDir)
-	t.Run("test/subtest", testTempDir)
-	t.Run("test\\subtest", testTempDir)
-	t.Run("test:subtest", testTempDir)
-	t.Run("test/..", testTempDir)
-	t.Run("../test", testTempDir)
-	t.Run("test[]", testTempDir)
-	t.Run("test*", testTempDir)
-	t.Run("äöüéè", testTempDir)
-}
-
-func testTempDir(t *testing.T) {
-	dirCh := make(chan string, 1)
-	t.Cleanup(func() {
-		// Verify directory has been removed.
-		select {
-		case dir := <-dirCh:
-			fi, err := os.Stat(dir)
-			if errors.Is(err, fs.ErrNotExist) {
-				// All good
-				return
-			}
-			if err != nil {
-				t.Fatal(err)
-			}
-			t.Errorf("directory %q still exists: %v, isDir=%v", dir, fi, fi.IsDir())
-		default:
-			if !t.Failed() {
-				t.Fatal("never received dir channel")
-			}
-		}
-	})
-
-	dir := t.TempDir()
-	if dir == "" {
-		t.Fatal("expected dir")
-	}
-	dir2 := t.TempDir()
-	if dir == dir2 {
-		t.Fatal("subsequent calls to TempDir returned the same directory")
-	}
-	if filepath.Dir(dir) != filepath.Dir(dir2) {
-		t.Fatalf("calls to TempDir do not share a parent; got %q, %q", dir, dir2)
-	}
-	dirCh <- dir
-	fi, err := os.Stat(dir)
-	if err != nil {
-		t.Fatal(err)
-	}
-	if !fi.IsDir() {
-		t.Errorf("dir %q is not a dir", dir)
-	}
-	files, err := os.ReadDir(dir)
-	if err != nil {
-		t.Fatal(err)
-	}
-	if len(files) > 0 {
-		t.Errorf("unexpected %d files in TempDir: %v", len(files), files)
-	}
-
-	glob := filepath.Join(dir, "*.txt")
-	if _, err := filepath.Glob(glob); err != nil {
-		t.Error(err)
-	}
-
-	err = os.Remove(dir)
-	if err != nil {
-		t.Errorf("unexpected files in TempDir")
-	}
-}
-
-func TestSetenv(t *testing.T) {
-	tests := []struct {
-		name               string
-		key                string
-		initialValueExists bool
-		initialValue       string
-		newValue           string
-	}{
-		{
-			name:               "initial value exists",
-			key:                "GO_TEST_KEY_1",
-			initialValueExists: true,
-			initialValue:       "111",
-			newValue:           "222",
-		},
-		{
-			name:               "initial value exists but empty",
-			key:                "GO_TEST_KEY_2",
-			initialValueExists: true,
-			initialValue:       "",
-			newValue:           "222",
-		},
-		{
-			name:               "initial value is not exists",
-			key:                "GO_TEST_KEY_3",
-			initialValueExists: false,
-			initialValue:       "",
-			newValue:           "222",
-		},
-	}
-
-	for _, test := range tests {
-		if test.initialValueExists {
-			if err := os.Setenv(test.key, test.initialValue); err != nil {
-				t.Fatalf("unable to set env: got %v", err)
-			}
-		} else {
-			os.Unsetenv(test.key)
-		}
-
-		t.Run(test.name, func(t *testing.T) {
-			t.Setenv(test.key, test.newValue)
-			if os.Getenv(test.key) != test.newValue {
-				t.Fatalf("unexpected value after t.Setenv: got %s, want %s", os.Getenv(test.key), test.newValue)
-			}
-		})
-
-		got, exists := os.LookupEnv(test.key)
-		if got != test.initialValue {
-			t.Fatalf("unexpected value after t.Setenv cleanup: got %s, want %s", got, test.initialValue)
-		}
-		if exists != test.initialValueExists {
-			t.Fatalf("unexpected value after t.Setenv cleanup: got %t, want %t", exists, test.initialValueExists)
-		}
-	}
-}
-
-func TestTesting(t *testing.T) {
-	if !testing.Testing() {
-		t.Error("Expected testing.Testing() to return true while in a test")
-	}
-}
@@ -1,11 +0,0 @@
-{
-    "inherits": [
-        "rp2350b"
-    ],
-    "build-tags": ["pico2_ice"],
-    "serial-port": ["2e8a:000A"],
-    "default-stack-size": 8192,
-    "ldflags": [
-        "--defsym=__flash_size=4M"
-    ]
-}