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runtime: rename mspan.stackfreelist -> manualFreeList

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We're going to use this free list for other types of manually-managed
memory in the heap.

For #19325.

Change-Id: Ib7e682295133eabfddf3a84f44db43d937bfdd9c
Reviewed-on: https://go-review.googlesource.com/38575
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rick Hudson <rlh@golang.org>
This commit is contained in:
Austin Clements 2017-03-16 15:02:02 -04:00
parent 8fbaa4f70b
commit ab9db51e1c
2 changed files with 17 additions and 16 deletions
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24
src/runtime/stack.go
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@ -193,24 +193,24 @@ func stackpoolalloc(order uint8) gclinkptr {
if s.allocCount != 0 {
throw("bad allocCount")
}
if s.stackfreelist.ptr() != nil {
throw("bad stackfreelist")
if s.manualFreeList.ptr() != nil {
throw("bad manualFreeList")
}
s.elemsize = _FixedStack << order
for i := uintptr(0); i < _StackCacheSize; i += s.elemsize {
x := gclinkptr(s.base() + i)
x.ptr().next = s.stackfreelist
s.stackfreelist = x
x.ptr().next = s.manualFreeList
s.manualFreeList = x
}
list.insert(s)
}
x := s.stackfreelist
x := s.manualFreeList
if x.ptr() == nil {
throw("span has no free stacks")
}
s.stackfreelist = x.ptr().next
s.manualFreeList = x.ptr().next
s.allocCount++
if s.stackfreelist.ptr() == nil {
if s.manualFreeList.ptr() == nil {
// all stacks in s are allocated.
list.remove(s)
}
@ -223,12 +223,12 @@ func stackpoolfree(x gclinkptr, order uint8) {
if s.state != _MSpanManual {
throw("freeing stack not in a stack span")
}
if s.stackfreelist.ptr() == nil {
if s.manualFreeList.ptr() == nil {
// s will now have a free stack
stackpool[order].insert(s)
}
x.ptr().next = s.stackfreelist
s.stackfreelist = x
x.ptr().next = s.manualFreeList
s.manualFreeList = x
s.allocCount--
if gcphase == _GCoff && s.allocCount == 0 {
// Span is completely free. Return it to the heap
@ -247,7 +247,7 @@ func stackpoolfree(x gclinkptr, order uint8) {
//
// By not freeing, we prevent step #4 until GC is done.
stackpool[order].remove(s)
s.stackfreelist = 0
s.manualFreeList = 0
mheap_.freeStack(s)
}
}
@ -1165,7 +1165,7 @@ func freeStackSpans() {
next := s.next
if s.allocCount == 0 {
list.remove(s)
s.stackfreelist = 0
s.manualFreeList = 0
mheap_.freeStack(s)
}
s = next