}
}

func TestCgoTracebackSigpanic(t *testing.T) {
	// Test unwinding over a sigpanic in C code without a C
	// symbolizer. See issue #23576.
	if runtime.GOOS == "windows" {
		// On Windows if we get an exception in C code, we let
		// the Windows exception handler unwind it, rather
		// than injecting a sigpanic.
		t.Skip("no sigpanic in C on windows")
	}
	if runtime.GOOS == "ios" {
		testenv.SkipFlaky(t, 59912)
	}

	if (ret) {
		fprintf(stderr, "runtime/cgo: thread_get_state failed: %d\n", ret);
		abort();
	}

	// Bounce call to sigpanic through asm that makes it look like
	// we call sigpanic directly from the faulting code.
#ifdef __arm64__
	thread_state.ts_64.__x[1] = thread_state.ts_64.__lr;
	thread_state.ts_64.__x[2] = thread_state.ts_64.__pc;

	// at runtime.sigpanic, because non-open-coded defers (which may be used in
	// non-opt or race checker mode) include an extra 'deferreturn' frame (which is
	// where the nil pointer deref happens).
	state := 1
	want := []string{"runtime.Callers", "runtime_test.TestCallersDeferNilFuncPanic.func1",
		"runtime.gopanic", "runtime.panicmem", "runtime.sigpanic"}

	defer func() {

			pc++
			if p.To.Sym == sigpanic {
				// The panic stack trace expects the PC at the call of sigpanic,
				// not the next one. However, runtime.Caller subtracts 1 from the
				// PC. To make both PC and PC-1 work (have the same line number),
				// we advance the PC by 2 at sigpanic.
				pc++
			}
		}
	}
	tableIdxs = append(tableIdxs, uint64(numResumePoints))

	Raceread          *obj.LSym
	Racereadrange     *obj.LSym
	Racewrite         *obj.LSym
	Racewriterange    *obj.LSym
	TypeAssert        *obj.LSym
	WBZero            *obj.LSym
	WBMove            *obj.LSym
	// Wasm
	SigPanic        *obj.LSym
	Staticuint64s   *obj.LSym
	Typedmemmove    *obj.LSym
	Udiv            *obj.LSym
	WriteBarrier    *obj.LSym
	Zerobase        *obj.LSym
	ARM64HasATOMICS *obj.LSym
	ARMHasVFPv4     *obj.LSym

	_SIGABRT:    {_SigNotify + _SigThrow, "SIGABRT: abort"},
	_SIGBUS:     {_SigPanic + _SigUnblock, "SIGBUS: bus error"},
	_SIGFPE:     {_SigPanic + _SigUnblock, "SIGFPE: floating-point exception"},
	_SIGKILL:    {0, "SIGKILL: kill"},
	_SIGUSR1:    {_SigNotify, "SIGUSR1: user-defined signal 1"},
	_SIGSEGV:    {_SigPanic + _SigUnblock, "SIGSEGV: segmentation violation"},
	_SIGUSR2:    {_SigNotify, "SIGUSR2: user-defined signal 2"},

//go:noinline
func testDeferLeafSigpanic1() {
	// Cause a sigpanic to be injected in this frame.
	//
	// This function has to be declared before
	// TestDeferLeafSigpanic so the runtime will crash if we think
	// this function's continuation PC is in
	// TestDeferLeafSigpanic.
	*(*int)(nil) = 0
}

// TestDeferLeafSigpanic tests defer matching around leaf functions
// that sigpanic. This is tricky because on LR machines the outer

)

func osinit() {
	// https://webassembly.github.io/spec/core/exec/runtime.html#memory-instances
	physPageSize = 64 * 1024
	initBloc()
	ncpu = 1
	getg().m.procid = 2
}

const _SIGSEGV = 0xb

func sigpanic() {
	gp := getg()
	if !canpanic() {
		throw("unexpected signal during runtime execution")
	}

	// js only invokes the exception handler for memory faults.
	gp.sig = _SIGSEGV
	panicmem()
}

	//   and this is the return PC (just after the CALL
	//   instruction). In this case, pc-1 reflects the CALL
	//   instruction itself and is the correct source of symbolic
	//   information.
	//
	// - If this frame "called" sigpanic, then pc is the
	//   instruction that panicked, and pc is the correct address
	//   to use for symbolic information.
	//
	// - If this is the innermost frame, then PC is where

	abi  int
}

var fextras = [...]extra{
	// compiler frontend inserted calls (sysfunc)
	{"deferproc", 1},
	{"deferprocStack", 1},
	{"deferreturn", 1},
	{"newproc", 1},
	{"panicoverflow", 1},
	{"sigpanic", 1},

	// compiler backend inserted calls
	{"gcWriteBarrier", 1},
	{"duffzero", 1},
	{"duffcopy", 1},

	// assembler backend inserted calls
	{"morestack", 0},        // asm function, ABI0