}

// NewAllocationMap creates an allocation bitmap using the random scan strategy.
func NewAllocationMap(max int, rangeSpec string) *AllocationBitmap {
	return NewAllocationMapWithOffset(max, rangeSpec, 0)
}

// NewAllocationMapWithOffset creates an allocation bitmap using a random scan strategy that
// allows to pass an offset that divides the allocation bitmap in two blocks.

		arena := mheap_.arenas[ai.l1()][ai.l2()]
		bitmap := arena.checkmarks

		if bitmap == nil {
			// Allocate bitmap on first use.
			bitmap = (*checkmarksMap)(persistentalloc(unsafe.Sizeof(*bitmap), 0, &memstats.gcMiscSys))
			if bitmap == nil {
				throw("out of memory allocating checkmarks bitmap")
			}
			arena.checkmarks = bitmap
		} else {
			// Otherwise clear the existing bitmap.
			clear(bitmap.b[:])
		}
	}

// There are 2 arg bitmaps for this function, each with 2 bits.
// In the first, p and q are both live, so that bitmap is 11.
// In the second, only p is live, so that bitmap is 10.
// Bitmaps are byte aligned, so if the first bitmap is interpreted as
// extending across the entire argument area, we incorrectly concatenate
// the bitmaps and end up using 110000001. That bad bitmap causes a6
// to be considered a pointer.

	if _, err := storage.Allocate(2); err != nil {
		t.Fatal(err)
	}

	// Release the item in the local bitmap
	// emulating it's out of sync with the storage
	err := backing.Release(2)
	if err != nil {
		t.Fatal(err)
	}

	// It should fail trying to allocate it deespite it's free
	// in the local bitmap because it's not in the storage
	ok, err := storage.Allocate(2)
	if ok || err != nil {
		t.Fatal(err)
	}

}

// IntArgRegBitmap is a bitmap large enough to hold one bit per
// integer argument/return register.
type IntArgRegBitmap [(IntArgRegs + 7) / 8]uint8

// Set sets the i'th bit of the bitmap to 1.
func (b *IntArgRegBitmap) Set(i int) {
	b[i/8] |= uint8(1) << (i % 8)
}

// Get returns whether the i'th bit of the bitmap is set.
//

// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Test that pointer bitmaps of types with large scalar tails are
// correctly repeated when unrolled into the heap bitmap.

package main

import "runtime"

const D = 57

type T struct {
	a [D]float64
	b map[string]int
	c [D]float64
}

var ts []T

	argSize = abid.stackCallArgsSize
	retOffset = abid.retOffset
	frametype = toType(ft)

	// Expand stack pointer bitmap into byte-map.
	for i := uint32(0); i < abid.stackPtrs.n; i++ {
		stack = append(stack, abid.stackPtrs.data[i/8]>>(i%8)&1)
	}

	// Expand register pointer bitmaps into byte-maps.
	bool2byte := func(b bool) byte {
		if b {
			return 1
		}
		return 0
	}
	for i := 0; i < intArgRegs; i++ {

image/x-portable-anymap        pnm              #
image/x-portable-bitmap        pbm              #
image/x-portable-graymap       pgm              #
image/x-portable-pixmap        ppm              #
image/x-rgb                    rgb              # RGB Image File
image/x-xbitmap                xbm              # X-bitmap Image File
image/x-xpixmap                xpm              # X-pixmap Image File
image/x-xwindowdump            xwd              #

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Issue 15747: liveness analysis was marking heap-escaped params live too much,
// and worse was using the wrong bitmap bits to do so.

package p

var global *[]byte

type Q struct{}

type T struct{ M string }

var b bool

// a pageCachePages*pageSize chunk of memory with 0 or more free
// pages in it.
type pageCache struct {
	base  uintptr // base address of the chunk
	cache uint64  // 64-bit bitmap representing free pages (1 means free)
	scav  uint64  // 64-bit bitmap representing scavenged pages (1 means scavenged)
}

// empty reports whether the page cache has no free pages.
func (c *pageCache) empty() bool {
	return c.cache == 0
}