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runtime: rewrite lots of foo_Bar(f, ...) into f.bar(...)

Browse source 
Applies to types fixAlloc, mCache, mCentral, mHeap, mSpan, and
mSpanList.

Two special cases:

1. mHeap_Scavenge() previously didn't take an *mheap parameter, so it
was specially handled in this CL.

2. mHeap_Free() would have collided with mheap's "free" field, so it's
been renamed to (*mheap).freeSpan to parallel its underlying
(*mheap).freeSpanLocked method.

Change-Id: I325938554cca432c166fe9d9d689af2bbd68de4b
Reviewed-on: https://go-review.googlesource.com/16221
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Matthew Dempsky 2015-11-11 16:13:51 -08:00
parent 58db5fc94d
commit c17c42e8a5
11 changed files with 158 additions and 162 deletions
Download patch file Download diff file Expand all files Collapse all files

2
src/runtime/heapdump.go
View file

@ -643,7 +643,7 @@ func mdump() {
for i := uintptr(0); i < uintptr(mheap_.nspan); i++ {
s := h_allspans[i]
if s.state == _MSpanInUse {
mSpan_EnsureSwept(s)
s.ensureSwept()
}
}
memclr(unsafe.Pointer(&typecache), unsafe.Sizeof(typecache))

25
src/runtime/malloc.go
View file

@ -76,9 +76,6 @@
// or the page heap can avoid zeroing altogether.
// 2. the cost of zeroing when reusing a small object is
// charged to the mutator, not the garbage collector.
//
// This code was written with an eye toward translating to Go
// in the future. Methods have the form Type_Method(Type *t, ...).
package runtime
@ -359,7 +356,7 @@ func mallocinit() {
}
// Initialize the rest of the allocator.
mHeap_Init(&mheap_, spansSize)
mheap_.init(spansSize)
_g_ := getg()
_g_.m.mcache = allocmcache()
}
@ -387,7 +384,7 @@ func sysReserveHigh(n uintptr, reserved *bool) unsafe.Pointer {
return sysReserve(nil, n, reserved)
}
func mHeap_SysAlloc(h *mheap, n uintptr) unsafe.Pointer {
func (h *mheap) sysAlloc(n uintptr) unsafe.Pointer {
if n > h.arena_end-h.arena_used {
// We are in 32-bit mode, maybe we didn't use all possible address space yet.
// Reserve some more space.
@ -409,8 +406,8 @@ func mHeap_SysAlloc(h *mheap, n uintptr) unsafe.Pointer {
// Our pages are bigger than hardware pages.
h.arena_end = p + p_size
used := p + (-uintptr(p) & (_PageSize - 1))
mHeap_MapBits(h, used)
mHeap_MapSpans(h, used)
h.mapBits(used)
h.mapSpans(used)
h.arena_used = used
h.arena_reserved = reserved
} else {
@ -424,8 +421,8 @@ func mHeap_SysAlloc(h *mheap, n uintptr) unsafe.Pointer {
// Keep taking from our reservation.
p := h.arena_used
sysMap(unsafe.Pointer(p), n, h.arena_reserved, &memstats.heap_sys)
mHeap_MapBits(h, p+n)
mHeap_MapSpans(h, p+n)
h.mapBits(p + n)
h.mapSpans(p + n)
h.arena_used = p + n
if raceenabled {
racemapshadow(unsafe.Pointer(p), n)
@ -460,8 +457,8 @@ func mHeap_SysAlloc(h *mheap, n uintptr) unsafe.Pointer {
p_end := p + p_size
p += -p & (_PageSize - 1)
if uintptr(p)+n > h.arena_used {
mHeap_MapBits(h, p+n)
mHeap_MapSpans(h, p+n)
h.mapBits(p + n)
h.mapSpans(p + n)
h.arena_used = p + n
if p_end > h.arena_end {
h.arena_end = p_end
@ -600,7 +597,7 @@ func mallocgc(size uintptr, typ *_type, flags uint32) unsafe.Pointer {
v := s.freelist
if v.ptr() == nil {
systemstack(func() {
mCache_Refill(c, tinySizeClass)
c.refill(tinySizeClass)
})
shouldhelpgc = true
s = c.alloc[tinySizeClass]
@ -632,7 +629,7 @@ func mallocgc(size uintptr, typ *_type, flags uint32) unsafe.Pointer {
v := s.freelist
if v.ptr() == nil {
systemstack(func() {
mCache_Refill(c, int32(sizeclass))
c.refill(int32(sizeclass))
})
shouldhelpgc = true
s = c.alloc[sizeclass]
@ -757,7 +754,7 @@ func largeAlloc(size uintptr, flag uint32) *mspan {
// pays the debt down to npage pages.
deductSweepCredit(npages*_PageSize, npages)
s := mHeap_Alloc(&mheap_, npages, 0, true, flag&_FlagNoZero == 0)
s := mheap_.alloc(npages, 0, true, flag&_FlagNoZero == 0)
if s == nil {
throw("out of memory")
}

2
src/runtime/mbitmap.go
View file

@ -131,7 +131,7 @@ func subtract1(p *byte) *byte {
// after observing the change to arena_used.
//
//go:nowritebarrier
func mHeap_MapBits(h *mheap, arena_used uintptr) {
func (h *mheap) mapBits(arena_used uintptr) {
// Caller has added extra mappings to the arena.
// Add extra mappings of bitmap words as needed.
// We allocate extra bitmap pieces in chunks of bitmapChunk.

14
src/runtime/mcache.go
View file

@ -63,7 +63,7 @@ var emptymspan mspan
func allocmcache() *mcache {
lock(&mheap_.lock)
c := (*mcache)(fixAlloc_Alloc(&mheap_.cachealloc))
c := (*mcache)(mheap_.cachealloc.alloc())
unlock(&mheap_.lock)
memclr(unsafe.Pointer(c), unsafe.Sizeof(*c))
for i := 0; i < _NumSizeClasses; i++ {
@ -75,7 +75,7 @@ func allocmcache() *mcache {
func freemcache(c *mcache) {
systemstack(func() {
mCache_ReleaseAll(c)
c.releaseAll()
stackcache_clear(c)
// NOTE(rsc,rlh): If gcworkbuffree comes back, we need to coordinate
@ -85,14 +85,14 @@ func freemcache(c *mcache) {
lock(&mheap_.lock)
purgecachedstats(c)
fixAlloc_Free(&mheap_.cachealloc, unsafe.Pointer(c))
mheap_.cachealloc.free(unsafe.Pointer(c))
unlock(&mheap_.lock)
})
}
// Gets a span that has a free object in it and assigns it
// to be the cached span for the given sizeclass. Returns this span.
func mCache_Refill(c *mcache, sizeclass int32) *mspan {
func (c *mcache) refill(sizeclass int32) *mspan {
_g_ := getg()
_g_.m.locks++
@ -106,7 +106,7 @@ func mCache_Refill(c *mcache, sizeclass int32) *mspan {
}
// Get a new cached span from the central lists.
s = mCentral_CacheSpan(&mheap_.central[sizeclass].mcentral)
s = mheap_.central[sizeclass].mcentral.cacheSpan()
if s == nil {
throw("out of memory")
}
@ -119,11 +119,11 @@ func mCache_Refill(c *mcache, sizeclass int32) *mspan {
return s
}
func mCache_ReleaseAll(c *mcache) {
func (c *mcache) releaseAll() {
for i := 0; i < _NumSizeClasses; i++ {
s := c.alloc[i]
if s != &emptymspan {
mCentral_UncacheSpan(&mheap_.central[i].mcentral, s)
mheap_.central[i].mcentral.uncacheSpan(s)
c.alloc[i] = &emptymspan
}
}

50
src/runtime/mcentral.go
View file

@ -23,14 +23,14 @@ type mcentral struct {
}
// Initialize a single central free list.
func mCentral_Init(c *mcentral, sizeclass int32) {
func (c *mcentral) init(sizeclass int32) {
c.sizeclass = sizeclass
mSpanList_Init(&c.nonempty)
mSpanList_Init(&c.empty)
c.nonempty.init()
c.empty.init()
}
// Allocate a span to use in an MCache.
func mCentral_CacheSpan(c *mcentral) *mspan {
func (c *mcentral) cacheSpan() *mspan {
// Deduct credit for this span allocation and sweep if necessary.
deductSweepCredit(uintptr(class_to_size[c.sizeclass]), 0)
@ -40,10 +40,10 @@ retry:
var s *mspan
for s = c.nonempty.first; s != nil; s = s.next {
if s.sweepgen == sg-2 && atomic.Cas(&s.sweepgen, sg-2, sg-1) {
mSpanList_Remove(&c.nonempty, s)
mSpanList_InsertBack(&c.empty, s)
c.nonempty.remove(s)
c.empty.insertBack(s)
unlock(&c.lock)
mSpan_Sweep(s, true)
s.sweep(true)
goto havespan
}
if s.sweepgen == sg-1 {
@ -51,8 +51,8 @@ retry:
continue
}
// we have a nonempty span that does not require sweeping, allocate from it
mSpanList_Remove(&c.nonempty, s)
mSpanList_InsertBack(&c.empty, s)
c.nonempty.remove(s)
c.empty.insertBack(s)
unlock(&c.lock)
goto havespan
}
@ -61,11 +61,11 @@ retry:
if s.sweepgen == sg-2 && atomic.Cas(&s.sweepgen, sg-2, sg-1) {
// we have an empty span that requires sweeping,
// sweep it and see if we can free some space in it
mSpanList_Remove(&c.empty, s)
c.empty.remove(s)
// swept spans are at the end of the list
mSpanList_InsertBack(&c.empty, s)
c.empty.insertBack(s)
unlock(&c.lock)
mSpan_Sweep(s, true)
s.sweep(true)
if s.freelist.ptr() != nil {
goto havespan
}
@ -85,12 +85,12 @@ retry:
unlock(&c.lock)
// Replenish central list if empty.
s = mCentral_Grow(c)
s = c.grow()
if s == nil {
return nil
}
lock(&c.lock)
mSpanList_InsertBack(&c.empty, s)
c.empty.insertBack(s)
unlock(&c.lock)
// At this point s is a non-empty span, queued at the end of the empty list,
@ -113,7 +113,7 @@ havespan:
}
// Return span from an MCache.
func mCentral_UncacheSpan(c *mcentral, s *mspan) {
func (c *mcentral) uncacheSpan(s *mspan) {
lock(&c.lock)
s.incache = false
@ -125,8 +125,8 @@ func mCentral_UncacheSpan(c *mcentral, s *mspan) {
cap := int32((s.npages << _PageShift) / s.elemsize)
n := cap - int32(s.ref)
if n > 0 {
mSpanList_Remove(&c.empty, s)
mSpanList_Insert(&c.nonempty, s)
c.empty.remove(s)
c.nonempty.insert(s)
}
unlock(&c.lock)
}
@ -137,7 +137,7 @@ func mCentral_UncacheSpan(c *mcentral, s *mspan) {
// the latest generation.
// If preserve=true, don't return the span to heap nor relink in MCentral lists;
// caller takes care of it.
func mCentral_FreeSpan(c *mcentral, s *mspan, n int32, start gclinkptr, end gclinkptr, preserve bool) bool {
func (c *mcentral) freeSpan(s *mspan, n int32, start gclinkptr, end gclinkptr, preserve bool) bool {
if s.incache {
throw("freespan into cached span")
}
@ -151,7 +151,7 @@ func mCentral_FreeSpan(c *mcentral, s *mspan, n int32, start gclinkptr, end gcli
if preserve {
// preserve is set only when called from MCentral_CacheSpan above,
// the span must be in the empty list.
if !mSpan_InList(s) {
if !s.inList() {
throw("can't preserve unlinked span")
}
atomic.Store(&s.sweepgen, mheap_.sweepgen)
@ -162,8 +162,8 @@ func mCentral_FreeSpan(c *mcentral, s *mspan, n int32, start gclinkptr, end gcli
// Move to nonempty if necessary.
if wasempty {
mSpanList_Remove(&c.empty, s)
mSpanList_Insert(&c.nonempty, s)
c.empty.remove(s)
c.nonempty.insert(s)
}
// delay updating sweepgen until here. This is the signal that
@ -178,22 +178,22 @@ func mCentral_FreeSpan(c *mcentral, s *mspan, n int32, start gclinkptr, end gcli
}
// s is completely freed, return it to the heap.
mSpanList_Remove(&c.nonempty, s)
c.nonempty.remove(s)
s.needzero = 1
s.freelist = 0
unlock(&c.lock)
heapBitsForSpan(s.base()).initSpan(s.layout())
mHeap_Free(&mheap_, s, 0)
mheap_.freeSpan(s, 0)
return true
}
// Fetch a new span from the heap and carve into objects for the free list.
func mCentral_Grow(c *mcentral) *mspan {
func (c *mcentral) grow() *mspan {
npages := uintptr(class_to_allocnpages[c.sizeclass])
size := uintptr(class_to_size[c.sizeclass])
n := (npages << _PageShift) / size
s := mHeap_Alloc(&mheap_, npages, c.sizeclass, false, true)
s := mheap_.alloc(npages, c.sizeclass, false, true)
if s == nil {
return nil
}

6
src/runtime/mfixalloc.go
View file

@ -40,7 +40,7 @@ type mlink struct {
// Initialize f to allocate objects of the given size,
// using the allocator to obtain chunks of memory.
func fixAlloc_Init(f *fixalloc, size uintptr, first func(arg, p unsafe.Pointer), arg unsafe.Pointer, stat *uint64) {
func (f *fixalloc) init(size uintptr, first func(arg, p unsafe.Pointer), arg unsafe.Pointer, stat *uint64) {
f.size = size
f.first = first
f.arg = arg
@ -51,7 +51,7 @@ func fixAlloc_Init(f *fixalloc, size uintptr, first func(arg, p unsafe.Pointer),
f.stat = stat
}
func fixAlloc_Alloc(f *fixalloc) unsafe.Pointer {
func (f *fixalloc) alloc() unsafe.Pointer {
if f.size == 0 {
print("runtime: use of FixAlloc_Alloc before FixAlloc_Init\n")
throw("runtime: internal error")
@ -78,7 +78,7 @@ func fixAlloc_Alloc(f *fixalloc) unsafe.Pointer {
return v
}
func fixAlloc_Free(f *fixalloc, p unsafe.Pointer) {
func (f *fixalloc) free(p unsafe.Pointer) {
f.inuse -= f.size
v := (*mlink)(p)
v.next = f.list

14
src/runtime/mgcsweep.go
View file

@ -47,7 +47,7 @@ func finishsweep_m(stw bool) {
sg := mheap_.sweepgen
for _, s := range work.spans {
if s.sweepgen != sg && s.state == _MSpanInUse {
mSpan_EnsureSwept(s)
s.ensureSwept()
}
}
}
@ -105,7 +105,7 @@ func sweepone() uintptr {
continue
}
npages := s.npages
if !mSpan_Sweep(s, false) {
if !s.sweep(false) {
npages = 0
}
_g_.m.locks--
@ -129,7 +129,7 @@ func gosweepdone() bool {
// Returns only when span s has been swept.
//go:nowritebarrier
func mSpan_EnsureSwept(s *mspan) {
func (s *mspan) ensureSwept() {
// Caller must disable preemption.
// Otherwise when this function returns the span can become unswept again
// (if GC is triggered on another goroutine).
@ -144,7 +144,7 @@ func mSpan_EnsureSwept(s *mspan) {
}
// The caller must be sure that the span is a MSpanInUse span.
if atomic.Cas(&s.sweepgen, sg-2, sg-1) {
mSpan_Sweep(s, false)
s.sweep(false)
return
}
// unfortunate condition, and we don't have efficient means to wait
@ -159,7 +159,7 @@ func mSpan_EnsureSwept(s *mspan) {
// If preserve=true, don't return it to heap nor relink in MCentral lists;
// caller takes care of it.
//TODO go:nowritebarrier
func mSpan_Sweep(s *mspan, preserve bool) bool {
func (s *mspan) sweep(preserve bool) bool {
// It's critical that we enter this function with preemption disabled,
// GC must not start while we are in the middle of this function.
_g_ := getg()
@ -312,7 +312,7 @@ func mSpan_Sweep(s *mspan, preserve bool) bool {
}
if nfree > 0 {
c.local_nsmallfree[cl] += uintptr(nfree)
res = mCentral_FreeSpan(&mheap_.central[cl].mcentral, s, int32(nfree), head, end, preserve)
res = mheap_.central[cl].mcentral.freeSpan(s, int32(nfree), head, end, preserve)
// MCentral_FreeSpan updates sweepgen
} else if freeToHeap {
// Free large span to heap
@ -335,7 +335,7 @@ func mSpan_Sweep(s *mspan, preserve bool) bool {
s.limit = 0 // prevent mlookup from finding this span
sysFault(unsafe.Pointer(uintptr(s.start<<_PageShift)), size)
} else {
mHeap_Free(&mheap_, s, 1)
mheap_.freeSpan(s, 1)
}
c.local_nlargefree++
c.local_largefree += size

167
src/runtime/mheap.go
View file

@ -246,7 +246,7 @@ func mlookup(v uintptr, base *uintptr, size *uintptr, sp **mspan) int32 {
unlock(&mheap_.lock)
}
s := mHeap_LookupMaybe(&mheap_, unsafe.Pointer(v))
s := mheap_.lookupMaybe(unsafe.Pointer(v))
if sp != nil {
*sp = s
}
@ -285,22 +285,22 @@ func mlookup(v uintptr, base *uintptr, size *uintptr, sp **mspan) int32 {
}
// Initialize the heap.
func mHeap_Init(h *mheap, spans_size uintptr) {
fixAlloc_Init(&h.spanalloc, unsafe.Sizeof(mspan{}), recordspan, unsafe.Pointer(h), &memstats.mspan_sys)
fixAlloc_Init(&h.cachealloc, unsafe.Sizeof(mcache{}), nil, nil, &memstats.mcache_sys)
fixAlloc_Init(&h.specialfinalizeralloc, unsafe.Sizeof(specialfinalizer{}), nil, nil, &memstats.other_sys)
fixAlloc_Init(&h.specialprofilealloc, unsafe.Sizeof(specialprofile{}), nil, nil, &memstats.other_sys)
func (h *mheap) init(spans_size uintptr) {
h.spanalloc.init(unsafe.Sizeof(mspan{}), recordspan, unsafe.Pointer(h), &memstats.mspan_sys)
h.cachealloc.init(unsafe.Sizeof(mcache{}), nil, nil, &memstats.mcache_sys)
h.specialfinalizeralloc.init(unsafe.Sizeof(specialfinalizer{}), nil, nil, &memstats.other_sys)
h.specialprofilealloc.init(unsafe.Sizeof(specialprofile{}), nil, nil, &memstats.other_sys)
// h->mapcache needs no init
for i := range h.free {
mSpanList_Init(&h.free[i])
mSpanList_Init(&h.busy[i])
h.free[i].init()
h.busy[i].init()
}
mSpanList_Init(&h.freelarge)
mSpanList_Init(&h.busylarge)
h.freelarge.init()
h.busylarge.init()
for i := range h.central {
mCentral_Init(&h.central[i].mcentral, int32(i))
h.central[i].mcentral.init(int32(i))
}
sp := (*slice)(unsafe.Pointer(&h_spans))
@ -317,7 +317,7 @@ func mHeap_Init(h *mheap, spans_size uintptr) {
// Waiting to update arena_used until after the memory has been mapped
// avoids faults when other threads try access the bitmap immediately
// after observing the change to arena_used.
func mHeap_MapSpans(h *mheap, arena_used uintptr) {
func (h *mheap) mapSpans(arena_used uintptr) {
// Map spans array, PageSize at a time.
n := arena_used
n -= h.arena_start
@ -332,18 +332,18 @@ func mHeap_MapSpans(h *mheap, arena_used uintptr) {
// Sweeps spans in list until reclaims at least npages into heap.
// Returns the actual number of pages reclaimed.
func mHeap_ReclaimList(h *mheap, list *mSpanList, npages uintptr) uintptr {
func (h *mheap) reclaimList(list *mSpanList, npages uintptr) uintptr {
n := uintptr(0)
sg := mheap_.sweepgen
retry:
for s := list.first; s != nil; s = s.next {
if s.sweepgen == sg-2 && atomic.Cas(&s.sweepgen, sg-2, sg-1) {
mSpanList_Remove(list, s)
list.remove(s)
// swept spans are at the end of the list
mSpanList_InsertBack(list, s)
list.insertBack(s)
unlock(&h.lock)
snpages := s.npages
if mSpan_Sweep(s, false) {
if s.sweep(false) {
n += snpages
}
lock(&h.lock)
@ -366,17 +366,17 @@ retry:
// Sweeps and reclaims at least npage pages into heap.
// Called before allocating npage pages.
func mHeap_Reclaim(h *mheap, npage uintptr) {
func (h *mheap) reclaim(npage uintptr) {
// First try to sweep busy spans with large objects of size >= npage,
// this has good chances of reclaiming the necessary space.
for i := int(npage); i < len(h.busy); i++ {
if mHeap_ReclaimList(h, &h.busy[i], npage) != 0 {
if h.reclaimList(&h.busy[i], npage) != 0 {
return // Bingo!
}
}
// Then -- even larger objects.
if mHeap_ReclaimList(h, &h.busylarge, npage) != 0 {
if h.reclaimList(&h.busylarge, npage) != 0 {
return // Bingo!
}
@ -384,7 +384,7 @@ func mHeap_Reclaim(h *mheap, npage uintptr) {
// One such object is not enough, so we need to reclaim several of them.
reclaimed := uintptr(0)
for i := 0; i < int(npage) && i < len(h.busy); i++ {
reclaimed += mHeap_ReclaimList(h, &h.busy[i], npage-reclaimed)
reclaimed += h.reclaimList(&h.busy[i], npage-reclaimed)
if reclaimed >= npage {
return
}
@ -407,7 +407,7 @@ func mHeap_Reclaim(h *mheap, npage uintptr) {
// Allocate a new span of npage pages from the heap for GC'd memory
// and record its size class in the HeapMap and HeapMapCache.
func mHeap_Alloc_m(h *mheap, npage uintptr, sizeclass int32, large bool) *mspan {
func (h *mheap) alloc_m(npage uintptr, sizeclass int32, large bool) *mspan {
_g_ := getg()
if _g_ != _g_.m.g0 {
throw("_mheap_alloc not on g0 stack")
@ -424,7 +424,7 @@ func mHeap_Alloc_m(h *mheap, npage uintptr, sizeclass int32, large bool) *mspan
// If GC kept a bit for whether there were any marks
// in a span, we could release these free spans
// at the end of GC and eliminate this entirely.
mHeap_Reclaim(h, npage)
h.reclaim(npage)
}
// transfer stats from cache to global
@ -435,7 +435,7 @@ func mHeap_Alloc_m(h *mheap, npage uintptr, sizeclass int32, large bool) *mspan
memstats.tinyallocs += uint64(_g_.m.mcache.local_tinyallocs)
_g_.m.mcache.local_tinyallocs = 0
s := mHeap_AllocSpanLocked(h, npage)
s := h.allocSpanLocked(npage)
if s != nil {
// Record span info, because gc needs to be
// able to map interior pointer to containing span.
@ -466,9 +466,9 @@ func mHeap_Alloc_m(h *mheap, npage uintptr, sizeclass int32, large bool) *mspan
memstats.heap_live += uint64(npage << _PageShift)
// Swept spans are at the end of lists.
if s.npages < uintptr(len(h.free)) {
mSpanList_InsertBack(&h.busy[s.npages], s)
h.busy[s.npages].insertBack(s)
} else {
mSpanList_InsertBack(&h.busylarge, s)
h.busylarge.insertBack(s)
}
}
}
@ -494,13 +494,13 @@ func mHeap_Alloc_m(h *mheap, npage uintptr, sizeclass int32, large bool) *mspan
return s
}
func mHeap_Alloc(h *mheap, npage uintptr, sizeclass int32, large bool, needzero bool) *mspan {
func (h *mheap) alloc(npage uintptr, sizeclass int32, large bool, needzero bool) *mspan {
// Don't do any operations that lock the heap on the G stack.
// It might trigger stack growth, and the stack growth code needs
// to be able to allocate heap.
var s *mspan
systemstack(func() {
s = mHeap_Alloc_m(h, npage, sizeclass, large)
s = h.alloc_m(npage, sizeclass, large)
})
if s != nil {
@ -512,13 +512,13 @@ func mHeap_Alloc(h *mheap, npage uintptr, sizeclass int32, large bool, needzero
return s
}
func mHeap_AllocStack(h *mheap, npage uintptr) *mspan {
func (h *mheap) allocStack(npage uintptr) *mspan {
_g_ := getg()
if _g_ != _g_.m.g0 {
throw("mheap_allocstack not on g0 stack")
}
lock(&h.lock)
s := mHeap_AllocSpanLocked(h, npage)
s := h.allocSpanLocked(npage)
if s != nil {
s.state = _MSpanStack
s.freelist = 0
@ -534,14 +534,14 @@ func mHeap_AllocStack(h *mheap, npage uintptr) *mspan {
// Allocates a span of the given size. h must be locked.
// The returned span has been removed from the
// free list, but its state is still MSpanFree.
func mHeap_AllocSpanLocked(h *mheap, npage uintptr) *mspan {
func (h *mheap) allocSpanLocked(npage uintptr) *mspan {
var list *mSpanList
var s *mspan
// Try in fixed-size lists up to max.
for i := int(npage); i < len(h.free); i++ {
list = &h.free[i]
if !mSpanList_IsEmpty(list) {
if !list.isEmpty() {
s = list.first
goto HaveSpan
}
@ -549,12 +549,12 @@ func mHeap_AllocSpanLocked(h *mheap, npage uintptr) *mspan {
// Best fit in list of large spans.
list = &h.freelarge
s = mHeap_AllocLarge(h, npage)
s = h.allocLarge(npage)
if s == nil {
if !mHeap_Grow(h, npage) {
if !h.grow(npage) {
return nil
}
s = mHeap_AllocLarge(h, npage)
s = h.allocLarge(npage)
if s == nil {
return nil
}
@ -568,8 +568,8 @@ HaveSpan:
if s.npages < npage {
throw("MHeap_AllocLocked - bad npages")
}
mSpanList_Remove(list, s)
if mSpan_InList(s) {
list.remove(s)
if s.inList() {
throw("still in list")
}
if s.npreleased > 0 {
@ -580,8 +580,8 @@ HaveSpan:
if s.npages > npage {
// Trim extra and put it back in the heap.
t := (*mspan)(fixAlloc_Alloc(&h.spanalloc))
mSpan_Init(t, s.start+pageID(npage), s.npages-npage)
t := (*mspan)(h.spanalloc.alloc())
t.init(s.start+pageID(npage), s.npages-npage)
s.npages = npage
p := uintptr(t.start)
p -= (h.arena_start >> _PageShift)
@ -593,7 +593,7 @@ HaveSpan:
t.needzero = s.needzero
s.state = _MSpanStack // prevent coalescing with s
t.state = _MSpanStack
mHeap_FreeSpanLocked(h, t, false, false, s.unusedsince)
h.freeSpanLocked(t, false, false, s.unusedsince)
s.state = _MSpanFree
}
s.unusedsince = 0
@ -608,14 +608,14 @@ HaveSpan:
memstats.heap_idle -= uint64(npage << _PageShift)
//println("spanalloc", hex(s.start<<_PageShift))
if mSpan_InList(s) {
if s.inList() {
throw("still in list")
}
return s
}
// Allocate a span of exactly npage pages from the list of large spans.
func mHeap_AllocLarge(h *mheap, npage uintptr) *mspan {
func (h *mheap) allocLarge(npage uintptr) *mspan {
return bestFit(&h.freelarge, npage, nil)
}
@ -638,7 +638,7 @@ func bestFit(list *mSpanList, npage uintptr, best *mspan) *mspan {
// returning whether it worked.
//
// h must be locked.
func mHeap_Grow(h *mheap, npage uintptr) bool {
func (h *mheap) grow(npage uintptr) bool {
// Ask for a big chunk, to reduce the number of mappings
// the operating system needs to track; also amortizes
// the overhead of an operating system mapping.
@ -649,11 +649,11 @@ func mHeap_Grow(h *mheap, npage uintptr) bool {
ask = _HeapAllocChunk
}
v := mHeap_SysAlloc(h, ask)
v := h.sysAlloc(ask)
if v == nil {
if ask > npage<<_PageShift {
ask = npage << _PageShift
v = mHeap_SysAlloc(h, ask)
v = h.sysAlloc(ask)
}
if v == nil {
print("runtime: out of memory: cannot allocate ", ask, "-byte block (", memstats.heap_sys, " in use)\n")
@ -663,8 +663,8 @@ func mHeap_Grow(h *mheap, npage uintptr) bool {
// Create a fake "in use" span and free it, so that the
// right coalescing happens.
s := (*mspan)(fixAlloc_Alloc(&h.spanalloc))
mSpan_Init(s, pageID(uintptr(v)>>_PageShift), ask>>_PageShift)
s := (*mspan)(h.spanalloc.alloc())
s.init(pageID(uintptr(v)>>_PageShift), ask>>_PageShift)
p := uintptr(s.start)
p -= (h.arena_start >> _PageShift)
for i := p; i < p+s.npages; i++ {
@ -673,14 +673,14 @@ func mHeap_Grow(h *mheap, npage uintptr) bool {
atomic.Store(&s.sweepgen, h.sweepgen)
s.state = _MSpanInUse
h.pagesInUse += uint64(npage)
mHeap_FreeSpanLocked(h, s, false, true, 0)
h.freeSpanLocked(s, false, true, 0)
return true
}
// Look up the span at the given address.
// Address is guaranteed to be in map
// and is guaranteed to be start or end of span.
func mHeap_Lookup(h *mheap, v unsafe.Pointer) *mspan {
func (h *mheap) lookup(v unsafe.Pointer) *mspan {
p := uintptr(v)
p -= h.arena_start
return h_spans[p>>_PageShift]
@ -693,7 +693,7 @@ func mHeap_Lookup(h *mheap, v unsafe.Pointer) *mspan {
// valid for allocated spans. Free spans may have
// other garbage in their middles, so we have to
// check for that.
func mHeap_LookupMaybe(h *mheap, v unsafe.Pointer) *mspan {
func (h *mheap) lookupMaybe(v unsafe.Pointer) *mspan {
if uintptr(v) < h.arena_start || uintptr(v) >= h.arena_used {
return nil
}
@ -708,7 +708,7 @@ func mHeap_LookupMaybe(h *mheap, v unsafe.Pointer) *mspan {
}
// Free the span back into the heap.
func mHeap_Free(h *mheap, s *mspan, acct int32) {
func (h *mheap) freeSpan(s *mspan, acct int32) {
systemstack(func() {
mp := getg().m
lock(&h.lock)
@ -724,7 +724,7 @@ func mHeap_Free(h *mheap, s *mspan, acct int32) {
if gcBlackenEnabled != 0 {
gcController.revise()
}
mHeap_FreeSpanLocked(h, s, true, true, 0)
h.freeSpanLocked(s, true, true, 0)
if trace.enabled {
traceHeapAlloc()
}
@ -732,7 +732,7 @@ func mHeap_Free(h *mheap, s *mspan, acct int32) {
})
}
func mHeap_FreeStack(h *mheap, s *mspan) {
func (h *mheap) freeStack(s *mspan) {
_g_ := getg()
if _g_ != _g_.m.g0 {
throw("mheap_freestack not on g0 stack")
@ -740,12 +740,12 @@ func mHeap_FreeStack(h *mheap, s *mspan) {
s.needzero = 1
lock(&h.lock)
memstats.stacks_inuse -= uint64(s.npages << _PageShift)
mHeap_FreeSpanLocked(h, s, true, true, 0)
h.freeSpanLocked(s, true, true, 0)
unlock(&h.lock)
}
// s must be on a busy list (h.busy or h.busylarge) or unlinked.
func mHeap_FreeSpanLocked(h *mheap, s *mspan, acctinuse, acctidle bool, unusedsince int64) {
func (h *mheap) freeSpanLocked(s *mspan, acctinuse, acctidle bool, unusedsince int64) {
switch s.state {
case _MSpanStack:
if s.ref != 0 {
@ -768,8 +768,8 @@ func mHeap_FreeSpanLocked(h *mheap, s *mspan, acctinuse, acctidle bool, unusedsi
memstats.heap_idle += uint64(s.npages << _PageShift)
}
s.state = _MSpanFree
if mSpan_InList(s) {
mSpanList_Remove(mHeap_BusyList(h, s.npages), s)
if s.inList() {
h.busyList(s.npages).remove(s)
}
// Stamp newly unused spans. The scavenger will use that
@ -792,9 +792,9 @@ func mHeap_FreeSpanLocked(h *mheap, s *mspan, acctinuse, acctidle bool, unusedsi
s.needzero |= t.needzero
p -= t.npages
h_spans[p] = s
mSpanList_Remove(mHeap_FreeList(h, t.npages), t)
h.freeList(t.npages).remove(t)
t.state = _MSpanDead
fixAlloc_Free(&h.spanalloc, unsafe.Pointer(t))
h.spanalloc.free(unsafe.Pointer(t))
}
}
if (p+s.npages)*ptrSize < h.spans_mapped {
@ -804,24 +804,24 @@ func mHeap_FreeSpanLocked(h *mheap, s *mspan, acctinuse, acctidle bool, unusedsi
s.npreleased += t.npreleased
s.needzero |= t.needzero
h_spans[p+s.npages-1] = s
mSpanList_Remove(mHeap_FreeList(h, t.npages), t)
h.freeList(t.npages).remove(t)
t.state = _MSpanDead
fixAlloc_Free(&h.spanalloc, unsafe.Pointer(t))
h.spanalloc.free(unsafe.Pointer(t))
}
}
// Insert s into appropriate list.
mSpanList_Insert(mHeap_FreeList(h, s.npages), s)
h.freeList(s.npages).insert(s)
}
func mHeap_FreeList(h *mheap, npages uintptr) *mSpanList {
func (h *mheap) freeList(npages uintptr) *mSpanList {
if npages < uintptr(len(h.free)) {
return &h.free[npages]
}
return &h.freelarge
}
func mHeap_BusyList(h *mheap, npages uintptr) *mSpanList {
func (h *mheap) busyList(npages uintptr) *mSpanList {
if npages < uintptr(len(h.free)) {
return &h.busy[npages]
}
@ -838,7 +838,7 @@ func scavengelist(list *mSpanList, now, limit uint64) uintptr {
return 0
}
if mSpanList_IsEmpty(list) {
if list.isEmpty() {
return 0
}
@ -855,8 +855,7 @@ func scavengelist(list *mSpanList, now, limit uint64) uintptr {
return sumreleased
}
func mHeap_Scavenge(k int32, now, limit uint64) {
h := &mheap_
func (h *mheap) scavenge(k int32, now, limit uint64) {
lock(&h.lock)
var sumreleased uintptr
for i := 0; i < len(h.free); i++ {
@ -878,11 +877,11 @@ func mHeap_Scavenge(k int32, now, limit uint64) {
//go:linkname runtime_debug_freeOSMemory runtime/debug.freeOSMemory
func runtime_debug_freeOSMemory() {
gcStart(gcForceBlockMode, false)
systemstack(func() { mHeap_Scavenge(-1, ^uint64(0), 0) })
systemstack(func() { mheap_.scavenge(-1, ^uint64(0), 0) })
}
// Initialize a new span with the given start and npages.
func mSpan_Init(span *mspan, start pageID, npages uintptr) {
func (span *mspan) init(start pageID, npages uintptr) {
span.next = nil
span.prev = nil
span.list = nil
@ -901,17 +900,17 @@ func mSpan_Init(span *mspan, start pageID, npages uintptr) {
span.needzero = 0
}
func mSpan_InList(span *mspan) bool {
func (span *mspan) inList() bool {
return span.prev != nil
}
// Initialize an empty doubly-linked list.
func mSpanList_Init(list *mSpanList) {
func (list *mSpanList) init() {
list.first = nil
list.last = &list.first
}
func mSpanList_Remove(list *mSpanList, span *mspan) {
func (list *mSpanList) remove(span *mspan) {
if span.prev == nil || span.list != list {
println("failed MSpanList_Remove", span, span.prev, span.list, list)
throw("MSpanList_Remove")
@ -929,11 +928,11 @@ func mSpanList_Remove(list *mSpanList, span *mspan) {
span.list = nil
}
func mSpanList_IsEmpty(list *mSpanList) bool {
func (list *mSpanList) isEmpty() bool {
return list.first == nil
}
func mSpanList_Insert(list *mSpanList, span *mspan) {
func (list *mSpanList) insert(span *mspan) {
if span.next != nil || span.prev != nil || span.list != nil {
println("failed MSpanList_Insert", span, span.next, span.prev, span.list)
throw("MSpanList_Insert")
@ -949,7 +948,7 @@ func mSpanList_Insert(list *mSpanList, span *mspan) {
span.list = list
}
func mSpanList_InsertBack(list *mSpanList, span *mspan) {
func (list *mSpanList) insertBack(span *mspan) {
if span.next != nil || span.prev != nil || span.list != nil {
println("failed MSpanList_InsertBack", span, span.next, span.prev, span.list)
throw("MSpanList_InsertBack")
@ -983,7 +982,7 @@ type special struct {
// (The add will fail only if a record with the same p and s->kind
// already exists.)
func addspecial(p unsafe.Pointer, s *special) bool {
span := mHeap_LookupMaybe(&mheap_, p)
span := mheap_.lookupMaybe(p)
if span == nil {
throw("addspecial on invalid pointer")
}
@ -992,7 +991,7 @@ func addspecial(p unsafe.Pointer, s *special) bool {
// Sweeping accesses the specials list w/o locks, so we have
// to synchronize with it. And it's just much safer.
mp := acquirem()
mSpan_EnsureSwept(span)
span.ensureSwept()
offset := uintptr(p) - uintptr(span.start<<_PageShift)
kind := s.kind
@ -1031,7 +1030,7 @@ func addspecial(p unsafe.Pointer, s *special) bool {
// Returns the record if the record existed, nil otherwise.
// The caller must FixAlloc_Free the result.
func removespecial(p unsafe.Pointer, kind uint8) *special {
span := mHeap_LookupMaybe(&mheap_, p)
span := mheap_.lookupMaybe(p)
if span == nil {
throw("removespecial on invalid pointer")
}
@ -1040,7 +1039,7 @@ func removespecial(p unsafe.Pointer, kind uint8) *special {
// Sweeping accesses the specials list w/o locks, so we have
// to synchronize with it. And it's just much safer.
mp := acquirem()
mSpan_EnsureSwept(span)
span.ensureSwept()
offset := uintptr(p) - uintptr(span.start<<_PageShift)
@ -1078,7 +1077,7 @@ type specialfinalizer struct {
// Adds a finalizer to the object p. Returns true if it succeeded.
func addfinalizer(p unsafe.Pointer, f *funcval, nret uintptr, fint *_type, ot *ptrtype) bool {
lock(&mheap_.speciallock)
s := (*specialfinalizer)(fixAlloc_Alloc(&mheap_.specialfinalizeralloc))
s := (*specialfinalizer)(mheap_.specialfinalizeralloc.alloc())
unlock(&mheap_.speciallock)
s.special.kind = _KindSpecialFinalizer
s.fn = f
@ -1110,7 +1109,7 @@ func addfinalizer(p unsafe.Pointer, f *funcval, nret uintptr, fint *_type, ot *p
// There was an old finalizer
lock(&mheap_.speciallock)
fixAlloc_Free(&mheap_.specialfinalizeralloc, unsafe.Pointer(s))
mheap_.specialfinalizeralloc.free(unsafe.Pointer(s))
unlock(&mheap_.speciallock)
return false
}
@ -1122,7 +1121,7 @@ func removefinalizer(p unsafe.Pointer) {
return // there wasn't a finalizer to remove
}
lock(&mheap_.speciallock)
fixAlloc_Free(&mheap_.specialfinalizeralloc, unsafe.Pointer(s))
mheap_.specialfinalizeralloc.free(unsafe.Pointer(s))
unlock(&mheap_.speciallock)
}
@ -1135,7 +1134,7 @@ type specialprofile struct {
// Set the heap profile bucket associated with addr to b.
func setprofilebucket(p unsafe.Pointer, b *bucket) {
lock(&mheap_.speciallock)
s := (*specialprofile)(fixAlloc_Alloc(&mheap_.specialprofilealloc))
s := (*specialprofile)(mheap_.specialprofilealloc.alloc())
unlock(&mheap_.speciallock)
s.special.kind = _KindSpecialProfile
s.b = b
@ -1152,13 +1151,13 @@ func freespecial(s *special, p unsafe.Pointer, size uintptr) {
sf := (*specialfinalizer)(unsafe.Pointer(s))
queuefinalizer(p, sf.fn, sf.nret, sf.fint, sf.ot)
lock(&mheap_.speciallock)
fixAlloc_Free(&mheap_.specialfinalizeralloc, unsafe.Pointer(sf))
mheap_.specialfinalizeralloc.free(unsafe.Pointer(sf))
unlock(&mheap_.speciallock)
case _KindSpecialProfile:
sp := (*specialprofile)(unsafe.Pointer(s))
mProf_Free(sp.b, size)
lock(&mheap_.speciallock)
fixAlloc_Free(&mheap_.specialprofilealloc, unsafe.Pointer(sp))
mheap_.specialprofilealloc.free(unsafe.Pointer(sp))
unlock(&mheap_.speciallock)
default:
throw("bad special kind")

2
src/runtime/mstats.go
View file

@ -325,7 +325,7 @@ func flushallmcaches() {
if c == nil {
continue
}
mCache_ReleaseAll(c)
c.releaseAll()
stackcache_clear(c)
}
}

2
src/runtime/proc.go
View file

@ -3379,7 +3379,7 @@ func sysmon() {
}
// scavenge heap once in a while
if lastscavenge+scavengelimit/2 < now {
mHeap_Scavenge(int32(nscavenge), uint64(now), uint64(scavengelimit))
mheap_.scavenge(int32(nscavenge), uint64(now), uint64(scavengelimit))
lastscavenge = now
nscavenge++
}

36
src/runtime/stack.go
View file

@ -160,9 +160,9 @@ func stackinit() {
throw("cache size must be a multiple of page size")
}
for i := range stackpool {
mSpanList_Init(&stackpool[i])
stackpool[i].init()
}
mSpanList_Init(&stackFreeQueue)
stackFreeQueue.init()
}
// Allocates a stack from the free pool. Must be called with
@ -172,7 +172,7 @@ func stackpoolalloc(order uint8) gclinkptr {
s := list.first
if s == nil {
// no free stacks. Allocate another span worth.
s = mHeap_AllocStack(&mheap_, _StackCacheSize>>_PageShift)
s = mheap_.allocStack(_StackCacheSize >> _PageShift)
if s == nil {
throw("out of memory")
}
@ -187,7 +187,7 @@ func stackpoolalloc(order uint8) gclinkptr {
x.ptr().next = s.freelist
s.freelist = x
}
mSpanList_Insert(list, s)
list.insert(s)
}
x := s.freelist
if x.ptr() == nil {
@ -197,20 +197,20 @@ func stackpoolalloc(order uint8) gclinkptr {
s.ref++
if s.freelist.ptr() == nil {
// all stacks in s are allocated.
mSpanList_Remove(list, s)
list.remove(s)
}
return x
}
// Adds stack x to the free pool. Must be called with stackpoolmu held.
func stackpoolfree(x gclinkptr, order uint8) {
s := mHeap_Lookup(&mheap_, unsafe.Pointer(x))
s := mheap_.lookup(unsafe.Pointer(x))
if s.state != _MSpanStack {
throw("freeing stack not in a stack span")
}
if s.freelist.ptr() == nil {
// s will now have a free stack
mSpanList_Insert(&stackpool[order], s)
stackpool[order].insert(s)
}
x.ptr().next = s.freelist
s.freelist = x
@ -231,9 +231,9 @@ func stackpoolfree(x gclinkptr, order uint8) {
// pointer into a free span.
//
// By not freeing, we prevent step #4 until GC is done.
mSpanList_Remove(&stackpool[order], s)
stackpool[order].remove(s)
s.freelist = 0
mHeap_FreeStack(&mheap_, s)
mheap_.freeStack(s)
}
}
@ -357,7 +357,7 @@ func stackalloc(n uint32) (stack, []stkbar) {
}
v = unsafe.Pointer(x)
} else {
s := mHeap_AllocStack(&mheap_, round(uintptr(n), _PageSize)>>_PageShift)
s := mheap_.allocStack(round(uintptr(n), _PageSize) >> _PageShift)
if s == nil {
throw("out of memory")
}
@ -424,7 +424,7 @@ func stackfree(stk stack, n uintptr) {
c.stackcache[order].size += n
}
} else {
s := mHeap_Lookup(&mheap_, v)
s := mheap_.lookup(v)
if s.state != _MSpanStack {
println(hex(s.start<<_PageShift), v)
throw("bad span state")
@ -432,7 +432,7 @@ func stackfree(stk stack, n uintptr) {
if gcphase == _GCoff {
// Free the stack immediately if we're
// sweeping.
mHeap_FreeStack(&mheap_, s)
mheap_.freeStack(s)
} else {
// Otherwise, add it to a list of stack spans
// to be freed at the end of GC.
@ -441,7 +441,7 @@ func stackfree(stk stack, n uintptr) {
// these spans as stacks, like we do for small
// stack spans. (See issue #11466.)
lock(&stackpoolmu)
mSpanList_Insert(&stackFreeQueue, s)
stackFreeQueue.insert(s)
unlock(&stackpoolmu)
}
}
@ -1001,19 +1001,19 @@ func freeStackSpans() {
for s := list.first; s != nil; {
next := s.next
if s.ref == 0 {
mSpanList_Remove(list, s)
list.remove(s)
s.freelist = 0
mHeap_FreeStack(&mheap_, s)
mheap_.freeStack(s)
}
s = next
}
}
// Free queued stack spans.
for !mSpanList_IsEmpty(&stackFreeQueue) {
for !stackFreeQueue.isEmpty() {
s := stackFreeQueue.first
mSpanList_Remove(&stackFreeQueue, s)
mHeap_FreeStack(&mheap_, s)
stackFreeQueue.remove(s)
mheap_.freeStack(s)
}
unlock(&stackpoolmu)