// or a megabyte. This memory is always immediately available for use.
//
// sysStat must be non-nil.
//
// Don't split the stack as this function may be invoked without a valid G,
// which prevents us from allocating more stack.
//
//go:nosplit
func sysAlloc(n uintptr, sysStat *sysMemStat) unsafe.Pointer {
	sysStat.add(int64(n))
	gcController.mappedReady.Add(int64(n))
	return sysAllocOS(n)
}

		if hi > len(p.summary[l]) {
			p.summary[l] = p.summary[l][:hi]
		}
	}
}

// sysInit initializes the scavengeIndex' chunks array.
//
// Returns the amount of memory added to sysStat.
func (s *scavengeIndex) sysInit(test bool, sysStat *sysMemStat) (mappedReady uintptr) {
	if test {
		// Set up the scavenge index via sysAlloc so the test can free it later.

			continue
		}

		// Map and commit need.
		sysMap(unsafe.Pointer(need.base.addr()), need.size(), p.sysStat)
		sysUsed(unsafe.Pointer(need.base.addr()), need.size(), need.size())
		p.summaryMappedReady += need.size()
	}

	// Update the scavenge index.
	p.summaryMappedReady += p.scav.index.sysGrow(base, limit, p.sysStat)
}

// sysGrow increases the index's backing store in response to a heap growth.
//

	totalBytes uintptr

	// sysStat is the stat to track allocations by this type
	sysStat *sysMemStat
}

func (a *addrRanges) init(sysStat *sysMemStat) {
	ranges := (*notInHeapSlice)(unsafe.Pointer(&a.ranges))
	ranges.len = 0
	ranges.cap = 16
	ranges.array = (*notInHeap)(persistentalloc(unsafe.Sizeof(addrRange{})*uintptr(ranges.cap), goarch.PtrSize, sysStat))
	a.sysStat = sysStat
	a.totalBytes = 0
}

		print("runtime: summary max pages = ", maxPackedValue, "\n")
		throw("root level max pages doesn't fit in summary")
	}
	p.sysStat = sysStat

	// Initialize p.inUse.
	p.inUse.init(sysStat)

	// System-dependent initialization.
	p.sysInit(test)

	// Start with the searchAddr in a state indicating there's no free memory.
	p.searchAddr = maxSearchAddr()

// resources in minit, semacreate, or elsewhere. Do not take locks after calling this.
func mdestroy(mp *m) {
}

var sysstat = []byte("/dev/sysstat\x00")

func getproccount() int32 {
	var buf [2048]byte
	fd := open(&sysstat[0], _OREAD, 0)
	if fd < 0 {
		return 1
	}
	ncpu := int32(0)
	for {
		n := read(fd, unsafe.Pointer(&buf), int32(len(buf)))
		if n <= 0 {
			break

// license that can be found in the LICENSE file.

//go:build unix

package tar

import (
	"io/fs"
	"os/user"
	"runtime"
	"strconv"
	"sync"
	"syscall"
)

func init() {
	sysStat = statUnix
}

// userMap and groupMap caches UID and GID lookups for performance reasons.
// The downside is that renaming uname or gname by the OS never takes effect.
var userMap, groupMap sync.Map // map[int]string

	case TypeFifo:
		mode |= fs.ModeNamedPipe
	}

	return mode
}

func (fi headerFileInfo) String() string {
	return fs.FormatFileInfo(fi)
}

// sysStat, if non-nil, populates h from system-dependent fields of fi.
var sysStat func(fi fs.FileInfo, h *Header, doNameLookups bool) error

const (
	// Mode constants from the USTAR spec:

// The returned memory will be zeroed.
// sysStat must be non-nil.
//
// Consider marking persistentalloc'd types not in heap by embedding
// runtime/internal/sys.NotInHeap.
func persistentalloc(size, align uintptr, sysStat *sysMemStat) unsafe.Pointer {
	var p *notInHeap
	systemstack(func() {
		p = persistentalloc1(size, align, sysStat)
	})
	return unsafe.Pointer(p)
}

//
// Returns the amount added to sysStat.
func (s *scavengeIndex) init(test bool, sysStat *sysMemStat) uintptr {
	s.searchAddrBg.Clear()
	s.searchAddrForce.Clear()
	s.freeHWM = minOffAddr
	s.test = test
	return s.sysInit(test, sysStat)
}

// sysGrow updates the index's backing store in response to a heap growth.
//
// Returns the amount of memory added to sysStat.