void foo2(void* p) {}
*/
import "C"
import (
	"fmt"
	"os"
	"runtime"
	"strconv"
	"time"
	"unsafe"
)

func init() {
	register("CgoSignalDeadlock", CgoSignalDeadlock)
	register("CgoTraceback", CgoTraceback)
	register("CgoCheckBytes", CgoCheckBytes)
}

func CgoSignalDeadlock() {
	runtime.GOMAXPROCS(100)
	ping := make(chan bool)
	go func() {
		for i := 0; ; i++ {
			runtime.Gosched()
			select {

// We do it this way so that the user's traceback function will be called
// by a C function with proper unwind info.
void
x_cgo_callers(uintptr_t sig, void *info, void *context, void (*cgoTraceback)(struct cgoTracebackArg*), uintptr_t* cgoCallers, void (*sigtramp)(uintptr_t, void*, void*)) {
	struct cgoTracebackArg arg;

	arg.Context = 0;
	arg.SigContext = (uintptr_t)(context);
	arg.Buf = cgoCallers;

extern int crashInGo;
int tracebackF1(void);
void cgoTraceback(void* parg);
void cgoSymbolizer(void* parg);
*/
import "C"

import (
	"runtime"
	"unsafe"
)

func init() {
	register("CrashTraceback", CrashTraceback)
	register("CrashTracebackGo", CrashTracebackGo)
}

func CrashTraceback() {
	runtime.SetCgoTraceback(0, unsafe.Pointer(C.cgoTraceback), nil, unsafe.Pointer(C.cgoSymbolizer))
	C.tracebackF1()
}

	uintptr_t  max;
};

struct cgoSymbolizerArg {
	uintptr_t   pc;
	const char* file;
	uintptr_t   lineno;
	const char* func;
	uintptr_t   entry;
	uintptr_t   more;
	uintptr_t   data;
};

void cgoTraceback(void* parg) {
	struct cgoTracebackArg* arg = (struct cgoTracebackArg*)(parg);
	arg->buf[0] = 1;
	arg->buf[1] = 2;
	arg->buf[2] = 3;
	arg->buf[3] = 0;
}

void cgoSymbolizer(void* parg) {

	if version != 0 {
		panic("unsupported version")
	}

	if cgoTraceback != nil && cgoTraceback != traceback ||
		cgoContext != nil && cgoContext != context ||
		cgoSymbolizer != nil && cgoSymbolizer != symbolizer {
		panic("call SetCgoTraceback only once")
	}

	cgoTraceback = traceback
	cgoContext = context
	cgoSymbolizer = symbolizer

	want := "OK\n"
	if got != want {
		t.Fatalf("expected %q, but got:\n%s", want, got)
	}
}

func TestCgoTraceback(t *testing.T) {
	t.Parallel()
	got := runTestProg(t, "testprogcgo", "CgoTraceback")
	want := "OK\n"
	if got != want {
		t.Fatalf("expected %q, but got:\n%s", want, got)
	}
}

func TestCgoCallbackGC(t *testing.T) {
	t.Parallel()
	switch runtime.GOOS {
	case "plan9", "windows":

			// This is done for historical reasons, and to make FuncForPC
			// work correctly for entries in the result of runtime.Callers.
			pc--
		}
		// It's important that interpret pc non-strictly as cgoTraceback may
		// have added bogus PCs with a valid funcInfo but invalid PCDATA.
		u, uf := newInlineUnwinder(funcInfo, pc)
		sf := u.srcFunc(uf)
		if u.isInlined(uf) {

	// GOTRACEBACK envvar to stdout, and prints "hello" to stderr. We then chown
	// the program to "nobody" and set u+s on it. We execute the program, only
	// passing it two files, for stdin and stdout, and passing
	// GOTRACEBACK=system in the env.
	//
	// We expect that the program will trigger the SUID protections, resetting
	// the value of GOTRACEBACK, and opening the missing stderr descriptor, such

package main

import (
	"fmt"
	"log"
	"os"
)

func main() {
	if os.Geteuid() == os.Getuid() {
		os.Exit(99)
	}

	fmt.Fprintf(os.Stdout, "GOTRACEBACK=%s\n", os.Getenv("GOTRACEBACK"))
	f, err := os.OpenFile(os.Getenv("TEST_OUTPUT"), os.O_CREATE|os.O_RDWR, 0600)
	if err != nil {
		log.Fatalf("os.Open failed: %s", err)
	}
	defer f.Close()
	fmt.Fprintf(os.Stderr, "hello\n")

	// environment variable values (currently we only force GOTRACEBACK=none)
	//
	// Other packages may also disable specific functionality when secure mode
	// is enabled (determined by using linkname to call isSecureMode).

	secureEnv()
}

func secureEnv() {
	var hasTraceback bool
	for i := 0; i < len(envs); i++ {
		if stringslite.HasPrefix(envs[i], "GOTRACEBACK=") {
			hasTraceback = true
			envs[i] = "GOTRACEBACK=none"