4f4a855d82
Reviewed-on: https://go-review.googlesource.com/c/158019 gotools/: * Makefile.am (go_cmd_vet_files): Update for Go1.12beta2 release. (GOTOOLS_TEST_TIMEOUT): Increase to 600. (check-runtime): Export LD_LIBRARY_PATH before computing GOARCH and GOOS. (check-vet): Copy golang.org/x/tools into check-vet-dir. * Makefile.in: Regenerate. gcc/testsuite/: * go.go-torture/execute/names-1.go: Stop using debug/xcoff, which is no longer externally visible. From-SVN: r268084
601 lines
14 KiB
Go
601 lines
14 KiB
Go
// Copyright 2014 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.
|
|
|
|
// Implementation of runtime/debug.WriteHeapDump. Writes all
|
|
// objects in the heap plus additional info (roots, threads,
|
|
// finalizers, etc.) to a file.
|
|
|
|
// The format of the dumped file is described at
|
|
// https://golang.org/s/go15heapdump.
|
|
|
|
package runtime
|
|
|
|
import (
|
|
"runtime/internal/sys"
|
|
"unsafe"
|
|
)
|
|
|
|
//go:linkname runtime_debug_WriteHeapDump runtime..z2fdebug.WriteHeapDump
|
|
func runtime_debug_WriteHeapDump(fd uintptr) {
|
|
stopTheWorld("write heap dump")
|
|
|
|
systemstack(func() {
|
|
writeheapdump_m(fd)
|
|
})
|
|
|
|
startTheWorld()
|
|
}
|
|
|
|
const (
|
|
fieldKindEol = 0
|
|
fieldKindPtr = 1
|
|
fieldKindIface = 2
|
|
fieldKindEface = 3
|
|
tagEOF = 0
|
|
tagObject = 1
|
|
tagOtherRoot = 2
|
|
tagType = 3
|
|
tagGoroutine = 4
|
|
tagStackFrame = 5
|
|
tagParams = 6
|
|
tagFinalizer = 7
|
|
tagItab = 8
|
|
tagOSThread = 9
|
|
tagMemStats = 10
|
|
tagQueuedFinalizer = 11
|
|
tagData = 12
|
|
tagBSS = 13
|
|
tagDefer = 14
|
|
tagPanic = 15
|
|
tagMemProf = 16
|
|
tagAllocSample = 17
|
|
)
|
|
|
|
var dumpfd uintptr // fd to write the dump to.
|
|
var tmpbuf []byte
|
|
|
|
// buffer of pending write data
|
|
const (
|
|
bufSize = 4096
|
|
)
|
|
|
|
var buf [bufSize]byte
|
|
var nbuf uintptr
|
|
|
|
func dwrite(data unsafe.Pointer, len uintptr) {
|
|
if len == 0 {
|
|
return
|
|
}
|
|
if nbuf+len <= bufSize {
|
|
copy(buf[nbuf:], (*[bufSize]byte)(data)[:len])
|
|
nbuf += len
|
|
return
|
|
}
|
|
|
|
write(dumpfd, unsafe.Pointer(&buf), int32(nbuf))
|
|
if len >= bufSize {
|
|
write(dumpfd, data, int32(len))
|
|
nbuf = 0
|
|
} else {
|
|
copy(buf[:], (*[bufSize]byte)(data)[:len])
|
|
nbuf = len
|
|
}
|
|
}
|
|
|
|
func dwritebyte(b byte) {
|
|
dwrite(unsafe.Pointer(&b), 1)
|
|
}
|
|
|
|
func flush() {
|
|
write(dumpfd, unsafe.Pointer(&buf), int32(nbuf))
|
|
nbuf = 0
|
|
}
|
|
|
|
// Cache of types that have been serialized already.
|
|
// We use a type's hash field to pick a bucket.
|
|
// Inside a bucket, we keep a list of types that
|
|
// have been serialized so far, most recently used first.
|
|
// Note: when a bucket overflows we may end up
|
|
// serializing a type more than once. That's ok.
|
|
const (
|
|
typeCacheBuckets = 256
|
|
typeCacheAssoc = 4
|
|
)
|
|
|
|
type typeCacheBucket struct {
|
|
t [typeCacheAssoc]*_type
|
|
}
|
|
|
|
var typecache [typeCacheBuckets]typeCacheBucket
|
|
|
|
// dump a uint64 in a varint format parseable by encoding/binary
|
|
func dumpint(v uint64) {
|
|
var buf [10]byte
|
|
var n int
|
|
for v >= 0x80 {
|
|
buf[n] = byte(v | 0x80)
|
|
n++
|
|
v >>= 7
|
|
}
|
|
buf[n] = byte(v)
|
|
n++
|
|
dwrite(unsafe.Pointer(&buf), uintptr(n))
|
|
}
|
|
|
|
func dumpbool(b bool) {
|
|
if b {
|
|
dumpint(1)
|
|
} else {
|
|
dumpint(0)
|
|
}
|
|
}
|
|
|
|
// dump varint uint64 length followed by memory contents
|
|
func dumpmemrange(data unsafe.Pointer, len uintptr) {
|
|
dumpint(uint64(len))
|
|
dwrite(data, len)
|
|
}
|
|
|
|
func dumpslice(b []byte) {
|
|
dumpint(uint64(len(b)))
|
|
if len(b) > 0 {
|
|
dwrite(unsafe.Pointer(&b[0]), uintptr(len(b)))
|
|
}
|
|
}
|
|
|
|
func dumpstr(s string) {
|
|
sp := stringStructOf(&s)
|
|
dumpmemrange(sp.str, uintptr(sp.len))
|
|
}
|
|
|
|
// dump information for a type
|
|
func dumptype(t *_type) {
|
|
if t == nil {
|
|
return
|
|
}
|
|
|
|
// If we've definitely serialized the type before,
|
|
// no need to do it again.
|
|
b := &typecache[t.hash&(typeCacheBuckets-1)]
|
|
if t == b.t[0] {
|
|
return
|
|
}
|
|
for i := 1; i < typeCacheAssoc; i++ {
|
|
if t == b.t[i] {
|
|
// Move-to-front
|
|
for j := i; j > 0; j-- {
|
|
b.t[j] = b.t[j-1]
|
|
}
|
|
b.t[0] = t
|
|
return
|
|
}
|
|
}
|
|
|
|
// Might not have been dumped yet. Dump it and
|
|
// remember we did so.
|
|
for j := typeCacheAssoc - 1; j > 0; j-- {
|
|
b.t[j] = b.t[j-1]
|
|
}
|
|
b.t[0] = t
|
|
|
|
// dump the type
|
|
dumpint(tagType)
|
|
dumpint(uint64(uintptr(unsafe.Pointer(t))))
|
|
dumpint(uint64(t.size))
|
|
if x := t.uncommontype; x == nil || t.pkgPath == nil || *t.pkgPath == "" {
|
|
dumpstr(t.string())
|
|
} else {
|
|
pkgpathstr := *t.pkgPath
|
|
pkgpath := stringStructOf(&pkgpathstr)
|
|
namestr := *t.name
|
|
name := stringStructOf(&namestr)
|
|
dumpint(uint64(uintptr(pkgpath.len) + 1 + uintptr(name.len)))
|
|
dwrite(pkgpath.str, uintptr(pkgpath.len))
|
|
dwritebyte('.')
|
|
dwrite(name.str, uintptr(name.len))
|
|
}
|
|
dumpbool(t.kind&kindDirectIface == 0 || t.kind&kindNoPointers == 0)
|
|
}
|
|
|
|
// dump an object
|
|
func dumpobj(obj unsafe.Pointer, size uintptr, bv bitvector) {
|
|
dumpint(tagObject)
|
|
dumpint(uint64(uintptr(obj)))
|
|
dumpmemrange(obj, size)
|
|
dumpfields(bv)
|
|
}
|
|
|
|
func dumpotherroot(description string, to unsafe.Pointer) {
|
|
dumpint(tagOtherRoot)
|
|
dumpstr(description)
|
|
dumpint(uint64(uintptr(to)))
|
|
}
|
|
|
|
func dumpfinalizer(obj unsafe.Pointer, fn *funcval, ft *functype, ot *ptrtype) {
|
|
dumpint(tagFinalizer)
|
|
dumpint(uint64(uintptr(obj)))
|
|
dumpint(uint64(uintptr(unsafe.Pointer(fn))))
|
|
dumpint(uint64(uintptr(unsafe.Pointer(fn.fn))))
|
|
dumpint(uint64(uintptr(unsafe.Pointer(ft))))
|
|
dumpint(uint64(uintptr(unsafe.Pointer(ot))))
|
|
}
|
|
|
|
type childInfo struct {
|
|
// Information passed up from the callee frame about
|
|
// the layout of the outargs region.
|
|
argoff uintptr // where the arguments start in the frame
|
|
arglen uintptr // size of args region
|
|
args bitvector // if args.n >= 0, pointer map of args region
|
|
sp *uint8 // callee sp
|
|
depth uintptr // depth in call stack (0 == most recent)
|
|
}
|
|
|
|
// dump kinds & offsets of interesting fields in bv
|
|
func dumpbv(cbv *bitvector, offset uintptr) {
|
|
for i := uintptr(0); i < uintptr(cbv.n); i++ {
|
|
if cbv.ptrbit(i) == 1 {
|
|
dumpint(fieldKindPtr)
|
|
dumpint(uint64(offset + i*sys.PtrSize))
|
|
}
|
|
}
|
|
}
|
|
|
|
func dumpgoroutine(gp *g) {
|
|
sp := gp.syscallsp
|
|
|
|
dumpint(tagGoroutine)
|
|
dumpint(uint64(uintptr(unsafe.Pointer(gp))))
|
|
dumpint(uint64(sp))
|
|
dumpint(uint64(gp.goid))
|
|
dumpint(uint64(gp.gopc))
|
|
dumpint(uint64(readgstatus(gp)))
|
|
dumpbool(isSystemGoroutine(gp, false))
|
|
dumpbool(false) // isbackground
|
|
dumpint(uint64(gp.waitsince))
|
|
dumpstr(gp.waitreason.String())
|
|
dumpint(0)
|
|
dumpint(uint64(uintptr(unsafe.Pointer(gp.m))))
|
|
dumpint(uint64(uintptr(unsafe.Pointer(gp._defer))))
|
|
dumpint(uint64(uintptr(unsafe.Pointer(gp._panic))))
|
|
|
|
// dump defer & panic records
|
|
for d := gp._defer; d != nil; d = d.link {
|
|
dumpint(tagDefer)
|
|
dumpint(uint64(uintptr(unsafe.Pointer(d))))
|
|
dumpint(uint64(uintptr(unsafe.Pointer(gp))))
|
|
dumpint(0)
|
|
dumpint(0)
|
|
dumpint(uint64(uintptr(unsafe.Pointer(d.pfn))))
|
|
dumpint(0)
|
|
dumpint(uint64(uintptr(unsafe.Pointer(d.link))))
|
|
}
|
|
for p := gp._panic; p != nil; p = p.link {
|
|
dumpint(tagPanic)
|
|
dumpint(uint64(uintptr(unsafe.Pointer(p))))
|
|
dumpint(uint64(uintptr(unsafe.Pointer(gp))))
|
|
eface := efaceOf(&p.arg)
|
|
dumpint(uint64(uintptr(unsafe.Pointer(eface._type))))
|
|
dumpint(uint64(uintptr(unsafe.Pointer(eface.data))))
|
|
dumpint(0) // was p->defer, no longer recorded
|
|
dumpint(uint64(uintptr(unsafe.Pointer(p.link))))
|
|
}
|
|
}
|
|
|
|
func dumpgs() {
|
|
// goroutines & stacks
|
|
for i := 0; uintptr(i) < allglen; i++ {
|
|
gp := allgs[i]
|
|
status := readgstatus(gp) // The world is stopped so gp will not be in a scan state.
|
|
switch status {
|
|
default:
|
|
print("runtime: unexpected G.status ", hex(status), "\n")
|
|
throw("dumpgs in STW - bad status")
|
|
case _Gdead:
|
|
// ok
|
|
case _Grunnable,
|
|
_Gsyscall,
|
|
_Gwaiting:
|
|
dumpgoroutine(gp)
|
|
}
|
|
}
|
|
}
|
|
|
|
func finq_callback(fn *funcval, obj unsafe.Pointer, ft *functype, ot *ptrtype) {
|
|
dumpint(tagQueuedFinalizer)
|
|
dumpint(uint64(uintptr(obj)))
|
|
dumpint(uint64(uintptr(unsafe.Pointer(fn))))
|
|
dumpint(uint64(uintptr(unsafe.Pointer(fn.fn))))
|
|
dumpint(uint64(uintptr(unsafe.Pointer(ft))))
|
|
dumpint(uint64(uintptr(unsafe.Pointer(ot))))
|
|
}
|
|
|
|
func dumproots() {
|
|
// MSpan.types
|
|
for _, s := range mheap_.allspans {
|
|
if s.state == mSpanInUse {
|
|
// Finalizers
|
|
for sp := s.specials; sp != nil; sp = sp.next {
|
|
if sp.kind != _KindSpecialFinalizer {
|
|
continue
|
|
}
|
|
spf := (*specialfinalizer)(unsafe.Pointer(sp))
|
|
p := unsafe.Pointer(s.base() + uintptr(spf.special.offset))
|
|
dumpfinalizer(p, spf.fn, spf.ft, spf.ot)
|
|
}
|
|
}
|
|
}
|
|
|
|
// Finalizer queue
|
|
iterate_finq(finq_callback)
|
|
}
|
|
|
|
// Bit vector of free marks.
|
|
// Needs to be as big as the largest number of objects per span.
|
|
var freemark [_PageSize / 8]bool
|
|
|
|
func dumpobjs() {
|
|
for _, s := range mheap_.allspans {
|
|
if s.state != mSpanInUse {
|
|
continue
|
|
}
|
|
p := s.base()
|
|
size := s.elemsize
|
|
n := (s.npages << _PageShift) / size
|
|
if n > uintptr(len(freemark)) {
|
|
throw("freemark array doesn't have enough entries")
|
|
}
|
|
|
|
for freeIndex := uintptr(0); freeIndex < s.nelems; freeIndex++ {
|
|
if s.isFree(freeIndex) {
|
|
freemark[freeIndex] = true
|
|
}
|
|
}
|
|
|
|
for j := uintptr(0); j < n; j, p = j+1, p+size {
|
|
if freemark[j] {
|
|
freemark[j] = false
|
|
continue
|
|
}
|
|
dumpobj(unsafe.Pointer(p), size, makeheapobjbv(p, size))
|
|
}
|
|
}
|
|
}
|
|
|
|
func dumpparams() {
|
|
dumpint(tagParams)
|
|
x := uintptr(1)
|
|
if *(*byte)(unsafe.Pointer(&x)) == 1 {
|
|
dumpbool(false) // little-endian ptrs
|
|
} else {
|
|
dumpbool(true) // big-endian ptrs
|
|
}
|
|
dumpint(sys.PtrSize)
|
|
var arenaStart, arenaEnd uintptr
|
|
for i1 := range mheap_.arenas {
|
|
if mheap_.arenas[i1] == nil {
|
|
continue
|
|
}
|
|
for i, ha := range mheap_.arenas[i1] {
|
|
if ha == nil {
|
|
continue
|
|
}
|
|
base := arenaBase(arenaIdx(i1)<<arenaL1Shift | arenaIdx(i))
|
|
if arenaStart == 0 || base < arenaStart {
|
|
arenaStart = base
|
|
}
|
|
if base+heapArenaBytes > arenaEnd {
|
|
arenaEnd = base + heapArenaBytes
|
|
}
|
|
}
|
|
}
|
|
dumpint(uint64(arenaStart))
|
|
dumpint(uint64(arenaEnd))
|
|
dumpstr(sys.GOARCH)
|
|
dumpstr(sys.Goexperiment)
|
|
dumpint(uint64(ncpu))
|
|
}
|
|
|
|
func dumpms() {
|
|
for mp := allm; mp != nil; mp = mp.alllink {
|
|
dumpint(tagOSThread)
|
|
dumpint(uint64(uintptr(unsafe.Pointer(mp))))
|
|
dumpint(uint64(mp.id))
|
|
dumpint(mp.procid)
|
|
}
|
|
}
|
|
|
|
func dumpmemstats() {
|
|
dumpint(tagMemStats)
|
|
dumpint(memstats.alloc)
|
|
dumpint(memstats.total_alloc)
|
|
dumpint(memstats.sys)
|
|
dumpint(memstats.nlookup)
|
|
dumpint(memstats.nmalloc)
|
|
dumpint(memstats.nfree)
|
|
dumpint(memstats.heap_alloc)
|
|
dumpint(memstats.heap_sys)
|
|
dumpint(memstats.heap_idle)
|
|
dumpint(memstats.heap_inuse)
|
|
dumpint(memstats.heap_released)
|
|
dumpint(memstats.heap_objects)
|
|
dumpint(memstats.stacks_inuse)
|
|
dumpint(memstats.stacks_sys)
|
|
dumpint(memstats.mspan_inuse)
|
|
dumpint(memstats.mspan_sys)
|
|
dumpint(memstats.mcache_inuse)
|
|
dumpint(memstats.mcache_sys)
|
|
dumpint(memstats.buckhash_sys)
|
|
dumpint(memstats.gc_sys)
|
|
dumpint(memstats.other_sys)
|
|
dumpint(memstats.next_gc)
|
|
dumpint(memstats.last_gc_unix)
|
|
dumpint(memstats.pause_total_ns)
|
|
for i := 0; i < 256; i++ {
|
|
dumpint(memstats.pause_ns[i])
|
|
}
|
|
dumpint(uint64(memstats.numgc))
|
|
}
|
|
|
|
func dumpmemprof_callback(b *bucket, nstk uintptr, pstk *location, size, allocs, frees uintptr) {
|
|
stk := (*[100000]location)(unsafe.Pointer(pstk))
|
|
dumpint(tagMemProf)
|
|
dumpint(uint64(uintptr(unsafe.Pointer(b))))
|
|
dumpint(uint64(size))
|
|
dumpint(uint64(nstk))
|
|
for i := uintptr(0); i < nstk; i++ {
|
|
pc := stk[i].pc
|
|
fn := stk[i].function
|
|
file := stk[i].filename
|
|
line := stk[i].lineno
|
|
if fn == "" {
|
|
var buf [64]byte
|
|
n := len(buf)
|
|
n--
|
|
buf[n] = ')'
|
|
if pc == 0 {
|
|
n--
|
|
buf[n] = '0'
|
|
} else {
|
|
for pc > 0 {
|
|
n--
|
|
buf[n] = "0123456789abcdef"[pc&15]
|
|
pc >>= 4
|
|
}
|
|
}
|
|
n--
|
|
buf[n] = 'x'
|
|
n--
|
|
buf[n] = '0'
|
|
n--
|
|
buf[n] = '('
|
|
dumpslice(buf[n:])
|
|
dumpstr("?")
|
|
dumpint(0)
|
|
} else {
|
|
dumpstr(fn)
|
|
dumpstr(file)
|
|
dumpint(uint64(line))
|
|
}
|
|
}
|
|
dumpint(uint64(allocs))
|
|
dumpint(uint64(frees))
|
|
}
|
|
|
|
func dumpmemprof() {
|
|
iterate_memprof(dumpmemprof_callback)
|
|
for _, s := range mheap_.allspans {
|
|
if s.state != mSpanInUse {
|
|
continue
|
|
}
|
|
for sp := s.specials; sp != nil; sp = sp.next {
|
|
if sp.kind != _KindSpecialProfile {
|
|
continue
|
|
}
|
|
spp := (*specialprofile)(unsafe.Pointer(sp))
|
|
p := s.base() + uintptr(spp.special.offset)
|
|
dumpint(tagAllocSample)
|
|
dumpint(uint64(p))
|
|
dumpint(uint64(uintptr(unsafe.Pointer(spp.b))))
|
|
}
|
|
}
|
|
}
|
|
|
|
var dumphdr = []byte("go1.7 heap dump\n")
|
|
|
|
func mdump() {
|
|
// make sure we're done sweeping
|
|
for _, s := range mheap_.allspans {
|
|
if s.state == mSpanInUse {
|
|
s.ensureSwept()
|
|
}
|
|
}
|
|
memclrNoHeapPointers(unsafe.Pointer(&typecache), unsafe.Sizeof(typecache))
|
|
dwrite(unsafe.Pointer(&dumphdr[0]), uintptr(len(dumphdr)))
|
|
dumpparams()
|
|
dumpobjs()
|
|
dumpgs()
|
|
dumpms()
|
|
dumproots()
|
|
dumpmemstats()
|
|
dumpmemprof()
|
|
dumpint(tagEOF)
|
|
flush()
|
|
}
|
|
|
|
func writeheapdump_m(fd uintptr) {
|
|
_g_ := getg()
|
|
casgstatus(_g_.m.curg, _Grunning, _Gwaiting)
|
|
_g_.waitreason = waitReasonDumpingHeap
|
|
|
|
// Update stats so we can dump them.
|
|
// As a side effect, flushes all the mcaches so the mspan.freelist
|
|
// lists contain all the free objects.
|
|
updatememstats()
|
|
|
|
// Set dump file.
|
|
dumpfd = fd
|
|
|
|
// Call dump routine.
|
|
mdump()
|
|
|
|
// Reset dump file.
|
|
dumpfd = 0
|
|
if tmpbuf != nil {
|
|
sysFree(unsafe.Pointer(&tmpbuf[0]), uintptr(len(tmpbuf)), &memstats.other_sys)
|
|
tmpbuf = nil
|
|
}
|
|
|
|
casgstatus(_g_.m.curg, _Gwaiting, _Grunning)
|
|
}
|
|
|
|
// dumpint() the kind & offset of each field in an object.
|
|
func dumpfields(bv bitvector) {
|
|
dumpbv(&bv, 0)
|
|
dumpint(fieldKindEol)
|
|
}
|
|
|
|
func makeheapobjbv(p uintptr, size uintptr) bitvector {
|
|
// Extend the temp buffer if necessary.
|
|
nptr := size / sys.PtrSize
|
|
if uintptr(len(tmpbuf)) < nptr/8+1 {
|
|
if tmpbuf != nil {
|
|
sysFree(unsafe.Pointer(&tmpbuf[0]), uintptr(len(tmpbuf)), &memstats.other_sys)
|
|
}
|
|
n := nptr/8 + 1
|
|
p := sysAlloc(n, &memstats.other_sys)
|
|
if p == nil {
|
|
throw("heapdump: out of memory")
|
|
}
|
|
tmpbuf = (*[1 << 30]byte)(p)[:n]
|
|
}
|
|
// Convert heap bitmap to pointer bitmap.
|
|
for i := uintptr(0); i < nptr/8+1; i++ {
|
|
tmpbuf[i] = 0
|
|
}
|
|
i := uintptr(0)
|
|
hbits := heapBitsForAddr(p)
|
|
for ; i < nptr; i++ {
|
|
if i != 1 && !hbits.morePointers() {
|
|
break // end of object
|
|
}
|
|
if hbits.isPointer() {
|
|
tmpbuf[i/8] |= 1 << (i % 8)
|
|
}
|
|
hbits = hbits.next()
|
|
}
|
|
return bitvector{int32(i), &tmpbuf[0]}
|
|
}
|
|
|
|
type gobitvector struct {
|
|
n uintptr
|
|
bytedata []uint8
|
|
}
|
|
|
|
func gobv(bv bitvector) gobitvector {
|
|
return gobitvector{
|
|
uintptr(bv.n),
|
|
(*[1 << 30]byte)(unsafe.Pointer(bv.bytedata))[:(bv.n+7)/8],
|
|
}
|
|
}
|