// Test cases for symbol name mangling.

package main

import (
	"fmt"
	"strings"
)

// Issue 58800:
// Instantiated function name may contain weird characters
// that confuse the external linker, so it needs to be
// mangled.
type S struct {
	X int `parser:"|@@)"`
}

//go:noinline
func F[T any]() {}

func P() {
	F[S]()
}

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package main

// Setting an environment variable in a cgo program changes the C
// environment. Test that this does not confuse the race detector.

/*
#cgo CFLAGS: -fsanitize=thread
#cgo LDFLAGS: -fsanitize=thread
*/
import "C"

import (
	"fmt"
	"os"
	"sync"
	"time"
)

func main() {
	var wg sync.WaitGroup

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package test

import (
	"fmt"
	"sort"
	"testing"
)

// Test that calling methods on generic types doesn't cause allocations.
func genericSorted[T sort.Interface](data T) bool {
	n := data.Len()
	for i := n - 1; i > 0; i-- {
		if data.Less(i, i-1) {
			return false
		}
	}
	return true
}

type sizedTestData struct {
	name string
	sn   string
	u    []uint64
	i    []int64
}

// values to generate tests. these should include the smallest and largest values, along
// with any other values that might cause issues. we generate n^2 tests for each size to
// cover all cases.
var szs = []sizedTestData{
	sizedTestData{name: "uint64", sn: "64", u: []uint64{0, 1, 4294967296, 0xffffFFFFffffFFFF}},

	uintptr_t a[20];
} S;

S f() {
	S *p;

	p = (S *)(malloc(sizeof(S)));
	p->a[0] = 0;
	return *p;
}
*/
import "C"

// allocateStack extends the stack so that stack copying doesn't
// confuse the msan data structures.
//
//go:noinline
func allocateStack(i int) int {
	if i == 0 {
		return i
	}
	return allocateStack(i - 1)
}

// F1 marks a chunk of stack as uninitialized.

var v4 = N{}
var v5 = A{}
var v6 = B{}

// Test that S is fully defined
var v7 = S{}

// Test that #define'd type is fully defined
var _ = issue38649{X: 0}

// Test that prefixes do not cause duplicate field names.
var _ = Issue48396{Fd: 1, Bpf_fd: 2}

func main() {
	pass := true

	// The Go translation of bitfields should not have any of the
	// bitfield types. The order in which bitfields are laid out

//	FromToolchain("go1.2.3-bigcorp") == "1.2.3"
//	FromToolchain("invalid") == ""
func FromToolchain(name string) string {
	if strings.ContainsAny(name, "\\/") {
		// The suffix must not include a path separator, since that would cause
		// exec.LookPath to resolve it from a relative directory instead of from
		// $PATH.
		return ""
	}

	var v string
	if strings.HasPrefix(name, "go") {
		v = name[2:]
	} else {
		return ""
	}

			t.Helper()
			t.Logf("%s is unexpectedly still blocked after %v", desc, quiescent)

			// Wait for the operation to actually complete, no matter how long it
			// takes. If the test has deadlocked, this will cause the test to time out
			// and dump goroutines.
			<-done

		case <-done:
		}
	}
}

func TestMutexExcludes(t *testing.T) {
	t.Parallel()

	dir, remove := mustTempDir(t)
	defer remove()

// dominates all blocks in which it is used.
func tighten(f *Func) {
	if base.Flag.N != 0 && len(f.Blocks) < 10000 {
		// Skip the optimization in -N mode, except for huge functions.
		// Too many values live across blocks can cause pathological
		// behavior in the register allocator (see issue 52180).
		return
	}

	canMove := f.Cache.allocBoolSlice(f.NumValues())
	defer f.Cache.freeBoolSlice(canMove)

package main

func main() {
	// This is enough to make sure that the executable references
	// a type descriptor, which was the cause of
	// https://golang.org/issue/25970.
	c := make(chan int)
	_ = c