// made to obtain the buildID information.
func (b *profileBuilder) readMapping() {
	if !machVMInfo(b.addMapping) {
		b.addMappingEntry(0, 0, 0, "", "", true)
	}
}

func readMainModuleMapping() (start, end uint64, exe, buildID string, err error) {
	first := true
	ok := machVMInfo(func(lo, hi, off uint64, file, build string) {
		if first {
			start, end = lo, hi
			exe, buildID = file, build
		}

	"unsafe"
)

func isExecutable(protection int32) bool {
	return (protection&_VM_PROT_EXECUTE) != 0 && (protection&_VM_PROT_READ) != 0
}

// machVMInfo uses the mach_vm_region region system call to add mapping entries
// for the text region of the running process.
func machVMInfo(addMapping func(lo, hi, offset uint64, file, buildID string)) bool {
	added := false
	var addr uint64 = 0x1
	for {
		var memRegionSize uint64

	"internal/abi"
	"internal/testenv"
	"os"
	"os/exec"
	"strconv"
	"strings"
	"testing"
)

func TestVMInfo(t *testing.T) {
	var begin, end, offset uint64
	var filename string
	first := true
	machVMInfo(func(lo, hi, off uint64, file, buildID string) {
		if first {
			begin = lo
			end = hi
			offset = off
			filename = file
		}
		// May see multiple text segments if rosetta is used for running