Adding upstream version 1.21.8.upstream/1.21.8

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 654 insertions, 0 deletions

diff --git a/src/runtime/race.go b/src/runtime/race.go
new file mode 100644
index 0000000..e2767f0
--- /dev/null
+++ b/src/runtime/race.go
@@ -0,0 +1,654 @@
+// Copyright 2012 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.
+
+//go:build race
+
+package runtime
+
+import (
+	"internal/abi"
+	"unsafe"
+)
+
+// Public race detection API, present iff build with -race.
+
+func RaceRead(addr unsafe.Pointer)
+func RaceWrite(addr unsafe.Pointer)
+func RaceReadRange(addr unsafe.Pointer, len int)
+func RaceWriteRange(addr unsafe.Pointer, len int)
+
+func RaceErrors() int {
+	var n uint64
+	racecall(&__tsan_report_count, uintptr(unsafe.Pointer(&n)), 0, 0, 0)
+	return int(n)
+}
+
+// RaceAcquire/RaceRelease/RaceReleaseMerge establish happens-before relations
+// between goroutines. These inform the race detector about actual synchronization
+// that it can't see for some reason (e.g. synchronization within RaceDisable/RaceEnable
+// sections of code).
+// RaceAcquire establishes a happens-before relation with the preceding
+// RaceReleaseMerge on addr up to and including the last RaceRelease on addr.
+// In terms of the C memory model (C11 §5.1.2.4, §7.17.3),
+// RaceAcquire is equivalent to atomic_load(memory_order_acquire).
+//
+//go:nosplit
+func RaceAcquire(addr unsafe.Pointer) {
+	raceacquire(addr)
+}
+
+// RaceRelease performs a release operation on addr that
+// can synchronize with a later RaceAcquire on addr.
+//
+// In terms of the C memory model, RaceRelease is equivalent to
+// atomic_store(memory_order_release).
+//
+//go:nosplit
+func RaceRelease(addr unsafe.Pointer) {
+	racerelease(addr)
+}
+
+// RaceReleaseMerge is like RaceRelease, but also establishes a happens-before
+// relation with the preceding RaceRelease or RaceReleaseMerge on addr.
+//
+// In terms of the C memory model, RaceReleaseMerge is equivalent to
+// atomic_exchange(memory_order_release).
+//
+//go:nosplit
+func RaceReleaseMerge(addr unsafe.Pointer) {
+	racereleasemerge(addr)
+}
+
+// RaceDisable disables handling of race synchronization events in the current goroutine.
+// Handling is re-enabled with RaceEnable. RaceDisable/RaceEnable can be nested.
+// Non-synchronization events (memory accesses, function entry/exit) still affect
+// the race detector.
+//
+//go:nosplit
+func RaceDisable() {
+	gp := getg()
+	if gp.raceignore == 0 {
+		racecall(&__tsan_go_ignore_sync_begin, gp.racectx, 0, 0, 0)
+	}
+	gp.raceignore++
+}
+
+// RaceEnable re-enables handling of race events in the current goroutine.
+//
+//go:nosplit
+func RaceEnable() {
+	gp := getg()
+	gp.raceignore--
+	if gp.raceignore == 0 {
+		racecall(&__tsan_go_ignore_sync_end, gp.racectx, 0, 0, 0)
+	}
+}
+
+// Private interface for the runtime.
+
+const raceenabled = true
+
+// For all functions accepting callerpc and pc,
+// callerpc is a return PC of the function that calls this function,
+// pc is start PC of the function that calls this function.
+func raceReadObjectPC(t *_type, addr unsafe.Pointer, callerpc, pc uintptr) {
+	kind := t.Kind_ & kindMask
+	if kind == kindArray || kind == kindStruct {
+		// for composite objects we have to read every address
+		// because a write might happen to any subobject.
+		racereadrangepc(addr, t.Size_, callerpc, pc)
+	} else {
+		// for non-composite objects we can read just the start
+		// address, as any write must write the first byte.
+		racereadpc(addr, callerpc, pc)
+	}
+}
+
+func raceWriteObjectPC(t *_type, addr unsafe.Pointer, callerpc, pc uintptr) {
+	kind := t.Kind_ & kindMask
+	if kind == kindArray || kind == kindStruct {
+		// for composite objects we have to write every address
+		// because a write might happen to any subobject.
+		racewriterangepc(addr, t.Size_, callerpc, pc)
+	} else {
+		// for non-composite objects we can write just the start
+		// address, as any write must write the first byte.
+		racewritepc(addr, callerpc, pc)
+	}
+}
+
+//go:noescape
+func racereadpc(addr unsafe.Pointer, callpc, pc uintptr)
+
+//go:noescape
+func racewritepc(addr unsafe.Pointer, callpc, pc uintptr)
+
+type symbolizeCodeContext struct {
+	pc   uintptr
+	fn   *byte
+	file *byte
+	line uintptr
+	off  uintptr
+	res  uintptr
+}
+
+var qq = [...]byte{'?', '?', 0}
+var dash = [...]byte{'-', 0}
+
+const (
+	raceGetProcCmd = iota
+	raceSymbolizeCodeCmd
+	raceSymbolizeDataCmd
+)
+
+// Callback from C into Go, runs on g0.
+func racecallback(cmd uintptr, ctx unsafe.Pointer) {
+	switch cmd {
+	case raceGetProcCmd:
+		throw("should have been handled by racecallbackthunk")
+	case raceSymbolizeCodeCmd:
+		raceSymbolizeCode((*symbolizeCodeContext)(ctx))
+	case raceSymbolizeDataCmd:
+		raceSymbolizeData((*symbolizeDataContext)(ctx))
+	default:
+		throw("unknown command")
+	}
+}
+
+// raceSymbolizeCode reads ctx.pc and populates the rest of *ctx with
+// information about the code at that pc.
+//
+// The race detector has already subtracted 1 from pcs, so they point to the last
+// byte of call instructions (including calls to runtime.racewrite and friends).
+//
+// If the incoming pc is part of an inlined function, *ctx is populated
+// with information about the inlined function, and on return ctx.pc is set
+// to a pc in the logically containing function. (The race detector should call this
+// function again with that pc.)
+//
+// If the incoming pc is not part of an inlined function, the return pc is unchanged.
+func raceSymbolizeCode(ctx *symbolizeCodeContext) {
+	pc := ctx.pc
+	fi := findfunc(pc)
+	if fi.valid() {
+		u, uf := newInlineUnwinder(fi, pc, nil)
+		for ; uf.valid(); uf = u.next(uf) {
+			sf := u.srcFunc(uf)
+			if sf.funcID == abi.FuncIDWrapper && u.isInlined(uf) {
+				// Ignore wrappers, unless we're at the outermost frame of u.
+				// A non-inlined wrapper frame always means we have a physical
+				// frame consisting entirely of wrappers, in which case we'll
+				// take a outermost wrapper over nothing.
+				continue
+			}
+
+			name := sf.name()
+			file, line := u.fileLine(uf)
+			if line == 0 {
+				// Failure to symbolize
+				continue
+			}
+			ctx.fn = &bytes(name)[0] // assume NUL-terminated
+			ctx.line = uintptr(line)
+			ctx.file = &bytes(file)[0] // assume NUL-terminated
+			ctx.off = pc - fi.entry()
+			ctx.res = 1
+			if u.isInlined(uf) {
+				// Set ctx.pc to the "caller" so the race detector calls this again
+				// to further unwind.
+				uf = u.next(uf)
+				ctx.pc = uf.pc
+			}
+			return
+		}
+	}
+	ctx.fn = &qq[0]
+	ctx.file = &dash[0]
+	ctx.line = 0
+	ctx.off = ctx.pc
+	ctx.res = 1
+}
+
+type symbolizeDataContext struct {
+	addr  uintptr
+	heap  uintptr
+	start uintptr
+	size  uintptr
+	name  *byte
+	file  *byte
+	line  uintptr
+	res   uintptr
+}
+
+func raceSymbolizeData(ctx *symbolizeDataContext) {
+	if base, span, _ := findObject(ctx.addr, 0, 0); base != 0 {
+		ctx.heap = 1
+		ctx.start = base
+		ctx.size = span.elemsize
+		ctx.res = 1
+	}
+}
+
+// Race runtime functions called via runtime·racecall.
+//
+//go:linkname __tsan_init __tsan_init
+var __tsan_init byte
+
+//go:linkname __tsan_fini __tsan_fini
+var __tsan_fini byte
+
+//go:linkname __tsan_proc_create __tsan_proc_create
+var __tsan_proc_create byte
+
+//go:linkname __tsan_proc_destroy __tsan_proc_destroy
+var __tsan_proc_destroy byte
+
+//go:linkname __tsan_map_shadow __tsan_map_shadow
+var __tsan_map_shadow byte
+
+//go:linkname __tsan_finalizer_goroutine __tsan_finalizer_goroutine
+var __tsan_finalizer_goroutine byte
+
+//go:linkname __tsan_go_start __tsan_go_start
+var __tsan_go_start byte
+
+//go:linkname __tsan_go_end __tsan_go_end
+var __tsan_go_end byte
+
+//go:linkname __tsan_malloc __tsan_malloc
+var __tsan_malloc byte
+
+//go:linkname __tsan_free __tsan_free
+var __tsan_free byte
+
+//go:linkname __tsan_acquire __tsan_acquire
+var __tsan_acquire byte
+
+//go:linkname __tsan_release __tsan_release
+var __tsan_release byte
+
+//go:linkname __tsan_release_acquire __tsan_release_acquire
+var __tsan_release_acquire byte
+
+//go:linkname __tsan_release_merge __tsan_release_merge
+var __tsan_release_merge byte
+
+//go:linkname __tsan_go_ignore_sync_begin __tsan_go_ignore_sync_begin
+var __tsan_go_ignore_sync_begin byte
+
+//go:linkname __tsan_go_ignore_sync_end __tsan_go_ignore_sync_end
+var __tsan_go_ignore_sync_end byte
+
+//go:linkname __tsan_report_count __tsan_report_count
+var __tsan_report_count byte
+
+// Mimic what cmd/cgo would do.
+//
+//go:cgo_import_static __tsan_init
+//go:cgo_import_static __tsan_fini
+//go:cgo_import_static __tsan_proc_create
+//go:cgo_import_static __tsan_proc_destroy
+//go:cgo_import_static __tsan_map_shadow
+//go:cgo_import_static __tsan_finalizer_goroutine
+//go:cgo_import_static __tsan_go_start
+//go:cgo_import_static __tsan_go_end
+//go:cgo_import_static __tsan_malloc
+//go:cgo_import_static __tsan_free
+//go:cgo_import_static __tsan_acquire
+//go:cgo_import_static __tsan_release
+//go:cgo_import_static __tsan_release_acquire
+//go:cgo_import_static __tsan_release_merge
+//go:cgo_import_static __tsan_go_ignore_sync_begin
+//go:cgo_import_static __tsan_go_ignore_sync_end
+//go:cgo_import_static __tsan_report_count
+
+// These are called from race_amd64.s.
+//
+//go:cgo_import_static __tsan_read
+//go:cgo_import_static __tsan_read_pc
+//go:cgo_import_static __tsan_read_range
+//go:cgo_import_static __tsan_write
+//go:cgo_import_static __tsan_write_pc
+//go:cgo_import_static __tsan_write_range
+//go:cgo_import_static __tsan_func_enter
+//go:cgo_import_static __tsan_func_exit
+
+//go:cgo_import_static __tsan_go_atomic32_load
+//go:cgo_import_static __tsan_go_atomic64_load
+//go:cgo_import_static __tsan_go_atomic32_store
+//go:cgo_import_static __tsan_go_atomic64_store
+//go:cgo_import_static __tsan_go_atomic32_exchange
+//go:cgo_import_static __tsan_go_atomic64_exchange
+//go:cgo_import_static __tsan_go_atomic32_fetch_add
+//go:cgo_import_static __tsan_go_atomic64_fetch_add
+//go:cgo_import_static __tsan_go_atomic32_compare_exchange
+//go:cgo_import_static __tsan_go_atomic64_compare_exchange
+
+// start/end of global data (data+bss).
+var racedatastart uintptr
+var racedataend uintptr
+
+// start/end of heap for race_amd64.s
+var racearenastart uintptr
+var racearenaend uintptr
+
+func racefuncenter(callpc uintptr)
+func racefuncenterfp(fp uintptr)
+func racefuncexit()
+func raceread(addr uintptr)
+func racewrite(addr uintptr)
+func racereadrange(addr, size uintptr)
+func racewriterange(addr, size uintptr)
+func racereadrangepc1(addr, size, pc uintptr)
+func racewriterangepc1(addr, size, pc uintptr)
+func racecallbackthunk(uintptr)
+
+// racecall allows calling an arbitrary function fn from C race runtime
+// with up to 4 uintptr arguments.
+func racecall(fn *byte, arg0, arg1, arg2, arg3 uintptr)
+
+// checks if the address has shadow (i.e. heap or data/bss).
+//
+//go:nosplit
+func isvalidaddr(addr unsafe.Pointer) bool {
+	return racearenastart <= uintptr(addr) && uintptr(addr) < racearenaend ||
+		racedatastart <= uintptr(addr) && uintptr(addr) < racedataend
+}
+
+//go:nosplit
+func raceinit() (gctx, pctx uintptr) {
+	lockInit(&raceFiniLock, lockRankRaceFini)
+
+	// On most machines, cgo is required to initialize libc, which is used by race runtime.
+	if !iscgo && GOOS != "darwin" {
+		throw("raceinit: race build must use cgo")
+	}
+
+	racecall(&__tsan_init, uintptr(unsafe.Pointer(&gctx)), uintptr(unsafe.Pointer(&pctx)), abi.FuncPCABI0(racecallbackthunk), 0)
+
+	// Round data segment to page boundaries, because it's used in mmap().
+	start := ^uintptr(0)
+	end := uintptr(0)
+	if start > firstmoduledata.noptrdata {
+		start = firstmoduledata.noptrdata
+	}
+	if start > firstmoduledata.data {
+		start = firstmoduledata.data
+	}
+	if start > firstmoduledata.noptrbss {
+		start = firstmoduledata.noptrbss
+	}
+	if start > firstmoduledata.bss {
+		start = firstmoduledata.bss
+	}
+	if end < firstmoduledata.enoptrdata {
+		end = firstmoduledata.enoptrdata
+	}
+	if end < firstmoduledata.edata {
+		end = firstmoduledata.edata
+	}
+	if end < firstmoduledata.enoptrbss {
+		end = firstmoduledata.enoptrbss
+	}
+	if end < firstmoduledata.ebss {
+		end = firstmoduledata.ebss
+	}
+	size := alignUp(end-start, _PageSize)
+	racecall(&__tsan_map_shadow, start, size, 0, 0)
+	racedatastart = start
+	racedataend = start + size
+
+	return
+}
+
+//go:nosplit
+func racefini() {
+	// racefini() can only be called once to avoid races.
+	// This eventually (via __tsan_fini) calls C.exit which has
+	// undefined behavior if called more than once. If the lock is
+	// already held it's assumed that the first caller exits the program
+	// so other calls can hang forever without an issue.
+	lock(&raceFiniLock)
+
+	// __tsan_fini will run C atexit functions and C++ destructors,
+	// which can theoretically call back into Go.
+	// Tell the scheduler we entering external code.
+	entersyscall()
+
+	// We're entering external code that may call ExitProcess on
+	// Windows.
+	osPreemptExtEnter(getg().m)
+
+	racecall(&__tsan_fini, 0, 0, 0, 0)
+}
+
+//go:nosplit
+func raceproccreate() uintptr {
+	var ctx uintptr
+	racecall(&__tsan_proc_create, uintptr(unsafe.Pointer(&ctx)), 0, 0, 0)
+	return ctx
+}
+
+//go:nosplit
+func raceprocdestroy(ctx uintptr) {
+	racecall(&__tsan_proc_destroy, ctx, 0, 0, 0)
+}
+
+//go:nosplit
+func racemapshadow(addr unsafe.Pointer, size uintptr) {
+	if racearenastart == 0 {
+		racearenastart = uintptr(addr)
+	}
+	if racearenaend < uintptr(addr)+size {
+		racearenaend = uintptr(addr) + size
+	}
+	racecall(&__tsan_map_shadow, uintptr(addr), size, 0, 0)
+}
+
+//go:nosplit
+func racemalloc(p unsafe.Pointer, sz uintptr) {
+	racecall(&__tsan_malloc, 0, 0, uintptr(p), sz)
+}
+
+//go:nosplit
+func racefree(p unsafe.Pointer, sz uintptr) {
+	racecall(&__tsan_free, uintptr(p), sz, 0, 0)
+}
+
+//go:nosplit
+func racegostart(pc uintptr) uintptr {
+	gp := getg()
+	var spawng *g
+	if gp.m.curg != nil {
+		spawng = gp.m.curg
+	} else {
+		spawng = gp
+	}
+
+	var racectx uintptr
+	racecall(&__tsan_go_start, spawng.racectx, uintptr(unsafe.Pointer(&racectx)), pc, 0)
+	return racectx
+}
+
+//go:nosplit
+func racegoend() {
+	racecall(&__tsan_go_end, getg().racectx, 0, 0, 0)
+}
+
+//go:nosplit
+func racectxend(racectx uintptr) {
+	racecall(&__tsan_go_end, racectx, 0, 0, 0)
+}
+
+//go:nosplit
+func racewriterangepc(addr unsafe.Pointer, sz, callpc, pc uintptr) {
+	gp := getg()
+	if gp != gp.m.curg {
+		// The call is coming from manual instrumentation of Go code running on g0/gsignal.
+		// Not interesting.
+		return
+	}
+	if callpc != 0 {
+		racefuncenter(callpc)
+	}
+	racewriterangepc1(uintptr(addr), sz, pc)
+	if callpc != 0 {
+		racefuncexit()
+	}
+}
+
+//go:nosplit
+func racereadrangepc(addr unsafe.Pointer, sz, callpc, pc uintptr) {
+	gp := getg()
+	if gp != gp.m.curg {
+		// The call is coming from manual instrumentation of Go code running on g0/gsignal.
+		// Not interesting.
+		return
+	}
+	if callpc != 0 {
+		racefuncenter(callpc)
+	}
+	racereadrangepc1(uintptr(addr), sz, pc)
+	if callpc != 0 {
+		racefuncexit()
+	}
+}
+
+//go:nosplit
+func raceacquire(addr unsafe.Pointer) {
+	raceacquireg(getg(), addr)
+}
+
+//go:nosplit
+func raceacquireg(gp *g, addr unsafe.Pointer) {
+	if getg().raceignore != 0 || !isvalidaddr(addr) {
+		return
+	}
+	racecall(&__tsan_acquire, gp.racectx, uintptr(addr), 0, 0)
+}
+
+//go:nosplit
+func raceacquirectx(racectx uintptr, addr unsafe.Pointer) {
+	if !isvalidaddr(addr) {
+		return
+	}
+	racecall(&__tsan_acquire, racectx, uintptr(addr), 0, 0)
+}
+
+//go:nosplit
+func racerelease(addr unsafe.Pointer) {
+	racereleaseg(getg(), addr)
+}
+
+//go:nosplit
+func racereleaseg(gp *g, addr unsafe.Pointer) {
+	if getg().raceignore != 0 || !isvalidaddr(addr) {
+		return
+	}
+	racecall(&__tsan_release, gp.racectx, uintptr(addr), 0, 0)
+}
+
+//go:nosplit
+func racereleaseacquire(addr unsafe.Pointer) {
+	racereleaseacquireg(getg(), addr)
+}
+
+//go:nosplit
+func racereleaseacquireg(gp *g, addr unsafe.Pointer) {
+	if getg().raceignore != 0 || !isvalidaddr(addr) {
+		return
+	}
+	racecall(&__tsan_release_acquire, gp.racectx, uintptr(addr), 0, 0)
+}
+
+//go:nosplit
+func racereleasemerge(addr unsafe.Pointer) {
+	racereleasemergeg(getg(), addr)
+}
+
+//go:nosplit
+func racereleasemergeg(gp *g, addr unsafe.Pointer) {
+	if getg().raceignore != 0 || !isvalidaddr(addr) {
+		return
+	}
+	racecall(&__tsan_release_merge, gp.racectx, uintptr(addr), 0, 0)
+}
+
+//go:nosplit
+func racefingo() {
+	racecall(&__tsan_finalizer_goroutine, getg().racectx, 0, 0, 0)
+}
+
+// The declarations below generate ABI wrappers for functions
+// implemented in assembly in this package but declared in another
+// package.
+
+//go:linkname abigen_sync_atomic_LoadInt32 sync/atomic.LoadInt32
+func abigen_sync_atomic_LoadInt32(addr *int32) (val int32)
+
+//go:linkname abigen_sync_atomic_LoadInt64 sync/atomic.LoadInt64
+func abigen_sync_atomic_LoadInt64(addr *int64) (val int64)
+
+//go:linkname abigen_sync_atomic_LoadUint32 sync/atomic.LoadUint32
+func abigen_sync_atomic_LoadUint32(addr *uint32) (val uint32)
+
+//go:linkname abigen_sync_atomic_LoadUint64 sync/atomic.LoadUint64
+func abigen_sync_atomic_LoadUint64(addr *uint64) (val uint64)
+
+//go:linkname abigen_sync_atomic_LoadUintptr sync/atomic.LoadUintptr
+func abigen_sync_atomic_LoadUintptr(addr *uintptr) (val uintptr)
+
+//go:linkname abigen_sync_atomic_LoadPointer sync/atomic.LoadPointer
+func abigen_sync_atomic_LoadPointer(addr *unsafe.Pointer) (val unsafe.Pointer)
+
+//go:linkname abigen_sync_atomic_StoreInt32 sync/atomic.StoreInt32
+func abigen_sync_atomic_StoreInt32(addr *int32, val int32)
+
+//go:linkname abigen_sync_atomic_StoreInt64 sync/atomic.StoreInt64
+func abigen_sync_atomic_StoreInt64(addr *int64, val int64)
+
+//go:linkname abigen_sync_atomic_StoreUint32 sync/atomic.StoreUint32
+func abigen_sync_atomic_StoreUint32(addr *uint32, val uint32)
+
+//go:linkname abigen_sync_atomic_StoreUint64 sync/atomic.StoreUint64
+func abigen_sync_atomic_StoreUint64(addr *uint64, val uint64)
+
+//go:linkname abigen_sync_atomic_SwapInt32 sync/atomic.SwapInt32
+func abigen_sync_atomic_SwapInt32(addr *int32, new int32) (old int32)
+
+//go:linkname abigen_sync_atomic_SwapInt64 sync/atomic.SwapInt64
+func abigen_sync_atomic_SwapInt64(addr *int64, new int64) (old int64)
+
+//go:linkname abigen_sync_atomic_SwapUint32 sync/atomic.SwapUint32
+func abigen_sync_atomic_SwapUint32(addr *uint32, new uint32) (old uint32)
+
+//go:linkname abigen_sync_atomic_SwapUint64 sync/atomic.SwapUint64
+func abigen_sync_atomic_SwapUint64(addr *uint64, new uint64) (old uint64)
+
+//go:linkname abigen_sync_atomic_AddInt32 sync/atomic.AddInt32
+func abigen_sync_atomic_AddInt32(addr *int32, delta int32) (new int32)
+
+//go:linkname abigen_sync_atomic_AddUint32 sync/atomic.AddUint32
+func abigen_sync_atomic_AddUint32(addr *uint32, delta uint32) (new uint32)
+
+//go:linkname abigen_sync_atomic_AddInt64 sync/atomic.AddInt64
+func abigen_sync_atomic_AddInt64(addr *int64, delta int64) (new int64)
+
+//go:linkname abigen_sync_atomic_AddUint64 sync/atomic.AddUint64
+func abigen_sync_atomic_AddUint64(addr *uint64, delta uint64) (new uint64)
+
+//go:linkname abigen_sync_atomic_AddUintptr sync/atomic.AddUintptr
+func abigen_sync_atomic_AddUintptr(addr *uintptr, delta uintptr) (new uintptr)
+
+//go:linkname abigen_sync_atomic_CompareAndSwapInt32 sync/atomic.CompareAndSwapInt32
+func abigen_sync_atomic_CompareAndSwapInt32(addr *int32, old, new int32) (swapped bool)
+
+//go:linkname abigen_sync_atomic_CompareAndSwapInt64 sync/atomic.CompareAndSwapInt64
+func abigen_sync_atomic_CompareAndSwapInt64(addr *int64, old, new int64) (swapped bool)
+
+//go:linkname abigen_sync_atomic_CompareAndSwapUint32 sync/atomic.CompareAndSwapUint32
+func abigen_sync_atomic_CompareAndSwapUint32(addr *uint32, old, new uint32) (swapped bool)
+
+//go:linkname abigen_sync_atomic_CompareAndSwapUint64 sync/atomic.CompareAndSwapUint64
+func abigen_sync_atomic_CompareAndSwapUint64(addr *uint64, old, new uint64) (swapped bool)