unlock(&stackpool[order].item.mu)
	}
}

// stackalloc allocates an n byte stack.
//
// stackalloc must run on the system stack because it uses per-P
// resources and must not split the stack.
//
//go:systemstack
func stackalloc(n uint32) stack {
	// Stackalloc must be called on scheduler stack, so that we
	// never try to grow the stack during the code that stackalloc runs.
	// Doing so would cause a deadlock (issue 1547).

  bool IsAllocOnly() const { return IsAlloc() && effects_.count() == 1; }
  bool IsReadOnly() const { return IsRead() && effects_.count() == 1; }
  ResourceId GetResourceId() const { return resource_id_; }

  void SetAlloc() { effects_.set(kAlloc); }
  void SetFree() { effects_.set(kFree); }
  void SetRead() { effects_.set(kRead); }
  void SetWrite() { effects_.set(kWrite); }
  void SetUnknownEffect() { effects_.set(); }

	gcController.memoryLimit.Store(maxInt64)
}

// sysAlloc allocates heap arena space for at least n bytes. The
// returned pointer is always heapArenaBytes-aligned and backed by
// h.arenas metadata. The returned size is always a multiple of
// heapArenaBytes. sysAlloc returns nil on failure.
// There is no corresponding free function.
//

				l = l1
				break
			}
		}
	}

	// If that failed, allocate a new logger.
	if l == nil {
		// Use sysAllocOS instead of sysAlloc because we want to interfere
		// with the runtime as little as possible, and sysAlloc updates accounting.
		l = (*dlogger)(sysAllocOS(unsafe.Sizeof(dlogger{})))
		if l == nil {
			throw("failed to allocate debug log")
		}
		l.w.r.data = &l.w.data

		}

		// Add the existing block to the full list.
		block.next = a.full
		a.full = block
	}

	// Allocate a new block.
	block = (*traceRegionAllocBlock)(sysAlloc(unsafe.Sizeof(traceRegionAllocBlock{}), &memstats.other_sys))
	if block == nil {
		throw("traceRegion: out of memory")
	}

	// Allocate space for our current request, so we always make
	// progress.

}
func thrkill_trampoline()

// mmap is used to do low-level memory allocation via mmap. Don't allow stack
// splits, since this function (used by sysAlloc) is called in a lot of low-level
// parts of the runtime and callers often assume it won't acquire any locks.
//
//go:nosplit
func mmap(addr unsafe.Pointer, n uintptr, prot, flags, fd int32, off uint32) (unsafe.Pointer, int) {

			traceBufFlush(w.traceBuf, w.gen)
		}
		if trace.empty != nil {
			w.traceBuf = trace.empty
			trace.empty = w.traceBuf.link
			unlock(&trace.lock)
		} else {
			unlock(&trace.lock)
			w.traceBuf = (*traceBuf)(sysAlloc(unsafe.Sizeof(traceBuf{}), &memstats.other_sys))
			if w.traceBuf == nil {
				throw("trace: out of memory")
			}
		}
	})
	// Initialize the buffer.
	ts := traceClockNow()
	if ts <= w.traceBuf.lastTime {

There are three mechanisms for allocating unmanaged memory:

* sysAlloc obtains memory directly from the OS. This comes in whole
  multiples of the system page size, but it can be freed with sysFree.

* persistentalloc combines multiple smaller allocations into a single
  sysAlloc to avoid fragmentation. However, there is no way to free
  persistentalloced objects (hence the name).

			hintList = &h.arenaHints
		}
		v, size := h.sysAlloc(userArenaChunkBytes, hintList, false)
		if size%userArenaChunkBytes != 0 {
			throw("sysAlloc size is not divisible by userArenaChunkBytes")
		}
		if size > userArenaChunkBytes {
			// We got more than we asked for. This can happen if
			// heapArenaSize > userArenaChunkSize, or if sysAlloc just returns

		n := 64 * 1024 / goarch.PtrSize
		if n < cap(h.allspans)*3/2 {
			n = cap(h.allspans) * 3 / 2
		}
		var new []*mspan
		sp := (*slice)(unsafe.Pointer(&new))
		sp.array = sysAlloc(uintptr(n)*goarch.PtrSize, &memstats.other_sys)
		if sp.array == nil {
			throw("runtime: cannot allocate memory")
		}
		sp.len = len(h.allspans)
		sp.cap = n
		if len(h.allspans) > 0 {