package runtime

import (
	"unsafe"
)

// Public address sanitizer API.
func ASanRead(addr unsafe.Pointer, len int) {
	sp := getcallersp()
	pc := getcallerpc()
	doasanread(addr, uintptr(len), sp, pc)
}

func ASanWrite(addr unsafe.Pointer, len int) {
	sp := getcallersp()
	pc := getcallerpc()
	doasanwrite(addr, uintptr(len), sp, pc)
}

// Private interface for the runtime.
const asanenabled = true

}

type ContextStub struct {
	context
}

func (c ContextStub) GetPC() uintptr {
	return c.ip()
}

func NewContextStub() *ContextStub {
	var ctx context
	ctx.set_ip(getcallerpc())
	ctx.set_sp(getcallersp())
	ctx.set_fp(getcallerfp())
	return &ContextStub{ctx}

		throw("defer on system stack")
	}

	d := newdefer()
	d.link = gp._defer
	gp._defer = d
	d.fn = fn
	d.pc = getcallerpc()
	// We must not be preempted between calling getcallersp and
	// storing it to d.sp because getcallersp's result is a
	// uintptr stack pointer.
	d.sp = getcallersp()

	// deferproc returns 0 normally.
	// a deferred func that stops a panic
	// makes the deferproc return 1.

// the call to f (where f will return).
//
// The call to getcallerpc and getcallersp must be done in the
// frame being asked about.
//
// The result of getcallersp is correct at the time of the return,
// but it may be invalidated by any subsequent call to a function
// that might relocate the stack in order to grow or shrink it.
// A general rule is that the result of getcallersp should be used

	{"runtime.int64tofloat32", 1},
	{"runtime.uint64tofloat64", 1},
	{"runtime.uint64tofloat32", 1},
	{"runtime.uint32tofloat64", 1},
	{"runtime.complex128div", 1},
	{"runtime.getcallerpc", 1},
	{"runtime.getcallersp", 1},
	{"runtime.racefuncenter", 1},
	{"runtime.racefuncexit", 1},
	{"runtime.raceread", 1},
	{"runtime.racewrite", 1},
	{"runtime.racereadrange", 1},
	{"runtime.racewriterange", 1},

// explaining why.
//
//go:nosplit
func debugCallCheck(pc uintptr) string {
	// No user calls from the system stack.
	if getg() != getg().m.curg {
		return debugCallSystemStack
	}
	if sp := getcallersp(); !(getg().stack.lo < sp && sp <= getg().stack.hi) {
		// Fast syscalls (nanotime) and racecall switch to the
		// g0 stack without switching g. We can't safely make
		// a call in this state. (We can't even safely

func uint64tofloat64(uint64) float64
func uint64tofloat32(uint64) float32
func uint32tofloat64(uint32) float64

func complex128div(num complex128, den complex128) (quo complex128)

func getcallerpc() uintptr
func getcallersp() uintptr

// race detection
func racefuncenter(uintptr)
func racefuncexit()
func raceread(uintptr)
func racewrite(uintptr)
func racereadrange(addr, size uintptr)

		prof.stack[1] = abi.FuncPCABIInternal(_LostContendedRuntimeLock) + sys.PCQuantum
		prof.stack[2] = 0
		return
	}

	var nstk int
	gp := getg()
	sp := getcallersp()
	pc := getcallerpc()
	systemstack(func() {
		var u unwinder
		u.initAt(pc, sp, 0, gp, unwindSilentErrors|unwindJumpStack)
		nstk = 1 + tracebackPCs(&u, skip, prof.stack[1:])
	})
	if nstk < len(prof.stack) {

	{"int64tofloat32", funcTag, 138},
	{"uint64tofloat64", funcTag, 139},
	{"uint64tofloat32", funcTag, 140},
	{"uint32tofloat64", funcTag, 141},
	{"complex128div", funcTag, 142},
	{"getcallerpc", funcTag, 143},
	{"getcallersp", funcTag, 143},
	{"racefuncenter", funcTag, 31},
	{"racefuncexit", funcTag, 9},
	{"raceread", funcTag, 31},
	{"racewrite", funcTag, 31},
	{"racereadrange", funcTag, 144},

	traceback1(pc, sp, lr, gp, 0)
}

// tracebacktrap is like traceback but expects that the PC and SP were obtained
// from a trap, not from gp->sched or gp->syscallpc/gp->syscallsp or getcallerpc/getcallersp.
// Because they are from a trap instead of from a saved pair,
// the initial PC must not be rewound to the previous instruction.
// (All the saved pairs record a PC that is a return address, so we