// Call a __tsan function from Go code.
// R8 = tsan function address
// R3 = *ThreadState a.k.a. g_racectx from g
// R4 = addr passed to __tsan function
//
// Otherwise, setup goroutine context and invoke racecall. Other arguments already set.
TEXT	racecalladdr<>(SB), NOSPLIT, $0-0
	MOVD    runtime·tls_g(SB), R10
	MOVD	0(R10), g
	MOVD	g_racectx(g), R3	// goroutine context

	MOVD	$__tsan_go_ignore_sync_begin(SB), R1
	MOVD	g_racectx(g), R2		// ThreadState *.
	BL	racecall<>(SB)
	MOVD	R6, R1				// Restore target function.
	MOVD	g_racectx(g), R2		// ThreadState *.
	MOVD	8(R15), R3			// Caller PC.
	MOVD	R7, R4				// PC.
	ADD	$24, R15, R5			// Arguments.
	BL	racecall<>(SB)
	MOVD	$__tsan_go_ignore_sync_end(SB), R1
	MOVD	g_racectx(g), R2		// ThreadState *.
	BL	racecall<>(SB)
	RET

	MOVQ	AX, BX	// remember the original function
	MOVQ	$__tsan_go_ignore_sync_begin(SB), AX
	MOVQ	g_racectx(R14), RARG0	// goroutine context
	CALL	racecall<>(SB)
	MOVQ	BX, AX	// restore the original function
	// Call the atomic function.
	MOVQ	g_racectx(R14), RARG0	// goroutine context
	MOVQ	8(SP), RARG1	// caller pc
	MOVQ	(SP), RARG2	// pc
	LEAQ	16(SP), RARG3	// arguments

TEXT	racefuncenter<>(SB), NOSPLIT, $0-0
	load_g
	MOVD	g_racectx(g), R0	// goroutine racectx
	MOVD	R9, R1
	// void __tsan_func_enter(ThreadState *thr, void *pc);
	MOVD	$__tsan_func_enter(SB), R9
	BL	racecall<>(SB)
	RET

// func runtime·racefuncexit()
// Called from instrumented code.
TEXT	runtime·racefuncexit<ABIInternal>(SB), NOSPLIT, $0-0
	load_g
	MOVD	g_racectx(g), R0	// race context

	} else {
		spawng = gp
	}

	var racectx uintptr
	racecall(&__tsan_go_start, spawng.racectx, uintptr(unsafe.Pointer(&racectx)), pc, 0)
	return racectx
}

//go:nosplit
func racegoend() {
	racecall(&__tsan_go_end, getg().racectx, 0, 0, 0)
}

//go:nosplit
func racectxend(racectx uintptr) {
	racecall(&__tsan_go_end, racectx, 0, 0, 0)
}

//go:nosplit

func raceacquire(addr unsafe.Pointer)                                       { throw("race") }
func raceacquireg(gp *g, addr unsafe.Pointer)                               { throw("race") }
func raceacquirectx(racectx uintptr, addr unsafe.Pointer)                   { throw("race") }
func racerelease(addr unsafe.Pointer)                                       { throw("race") }

			t.ts.zombies.Add(1)
		}
		t.updateHeap()
	}
	t.unlock()

	if raceenabled {
		// Temporarily use the current P's racectx for g0.
		gp := getg()
		if gp.racectx != 0 {
			throw("unexpected racectx")
		}
		gp.racectx = gp.m.p.ptr().timers.raceCtx
	}

	if ts != nil {
		ts.unlock()
	}

	async := debug.asynctimerchan.Load() != 0
	if !async && t.isChan {

	if raceenabled {
		// g0 doesn't have a race context. Borrow the user G's.
		if getg().racectx != 0 {
			throw("expected racectx == 0")
		}
		getg().racectx = getg().m.curg.racectx
		// (This defer should get open-coded, which is safe on
		// the system stack.)
		defer func() { getg().racectx = 0 }()
	}

	// This function must not allocate while holding trace.lock:

	// allocate and skew the stats.
	metricsLock()
	initMetrics()

	systemstack(func() {
		// Donate the racectx to g0. readMetricsLocked calls into the race detector
		// via map access.
		getg().racectx = getg().m.curg.racectx

		// Read the metrics once before in case it allocates and skews the metrics.
		// readMetricsLocked is designed to only allocate the first time it is called

// Value to use for signal mask for newly created M's.
var initSigmask sigset

// The main goroutine.
func main() {
	mp := getg().m

	// Racectx of m0->g0 is used only as the parent of the main goroutine.
	// It must not be used for anything else.
	mp.g0.racectx = 0

	// Max stack size is 1 GB on 64-bit, 250 MB on 32-bit.
	// Using decimal instead of binary GB and MB because