// Copyright 2022 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.

// Stress test setgid and thread creation. A thread
// can get a SIGSETXID signal early on at thread
// initialization, causing crash. See issue 53374.

package cgotest

/*
#include <sys/types.h>
#include <unistd.h>
*/
import "C"

import (
	"runtime"
	"testing"
)

// For example, two [Named] types can be identical only if their
// [Named.Obj] methods return the same [TypeName] symbol.
// A collection of symbols is consistent if, for each logical
// package whose path is P, the creation of those symbols
// involved at most one call to [NewPackage](P, ...).
// To ensure consistency, use a single [Importer] for
// all loaded packages and their dependencies.

	t.Parallel()
	for _, test := range tests {
		test := test
		t.Run(test, func(t *testing.T) {
			t.Parallel()
			var want []byte
			tmp, err := os.CreateTemp("", "")
			if err != nil {
				t.Fatalf("temp file creation failed: %v", err)
			}
			defer os.Remove(tmp.Name())
			defer tmp.Close()
			for i := 0; i < iters; i++ {
				// Note: use -c 2 to expose any nondeterminism which is the result
				// of the runtime scheduler.

// arguments, recording pos as the position of its synthetic object (for error
// reporting).
//
// If set, expanding is the named type instance currently being expanded, that
// led to the creation of this instance.
func (check *Checker) newNamedInstance(pos syntax.Pos, orig *Named, targs []Type, expanding *Named) *Named {
	assert(len(targs) > 0)

	obj := NewTypeName(pos, orig.obj.pkg, orig.obj.name, nil)

				err = fmt.Errorf("Config.Importer.Import(%s) returned nil but no error", path)
			}
		}
		// make sure we have a valid package name
		// (errors here can only happen through manipulation of packages after creation)
		if err == nil && imp != nil && (imp.name == "_" || imp.name == "") {
			err = fmt.Errorf("invalid package name: %q", imp.name)
			imp = nil // create fake package below
		}
		if err != nil {

		}
		tmp, err := os.MkdirTemp(cfg.Getenv("GOTMPDIR"), "go-build")
		if err != nil {
			base.Fatalf("go: creating work dir: %v", err)
		}
		if !filepath.IsAbs(tmp) {
			abs, err := filepath.Abs(tmp)
			if err != nil {
				os.RemoveAll(tmp)
				base.Fatalf("go: creating work dir: %v", err)
			}
			tmp = abs
		}
		b.WorkDir = tmp
		builderWorkDirs.Store(b, b.WorkDir)

	// Rewrite for vars := range X { ... } to
	//
	//	{
	//		r.declStmt
	//		call
	//		checks
	//	}
	//
	// The r.declStmt can be added to by this loop or any inner loop
	// during the creation of r.bodyFunc; it is only emitted in the outermost
	// converted range loop.
	block := &syntax.BlockStmt{Rbrace: end}
	setPos(block, start)
	if len(r.forStack) == 1 && r.declStmt != nil {

// 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.

/*
Cgo enables the creation of Go packages that call C code.

# Using cgo with the go command

To use cgo write normal Go code that imports a pseudo-package "C".
The Go code can then refer to types such as C.size_t, variables such
as C.stdout, or functions such as C.putchar.

				t.Errorf("last appended result was %s; want %s", x, want)
			}
		}
	}
}

// Test case for any function which accepts and returns a byte slice.
// For ease of creation, we write the input byte slice as a string.
type StringTest struct {
	in  string
	out []byte
}

var upperTests = []StringTest{
	{"", []byte("")},
	{"ONLYUPPER", []byte("ONLYUPPER")},

// Most internal data structures are pre-allocated and flat, so for instance adding a
// new relation does not cause any allocation. For performance reasons,
// each node has only up to two outgoing edges (like a binary tree), so intermediate
// "extra" nodes are required to represent more than two relations. For instance,
// to record that A<I, A<J, A<K (with no known relation between I,J,K), we create the
// following DAG:
//
//	  A
//	 / \