libgo: update to Go1.18beta2

gotools/
	* Makefile.am (go_cmd_cgo_files): Add ast_go118.go
	(check-go-tool): Copy golang.org/x/tools directories.
	* Makefile.in: Regenerate.

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/384695

1 files changed, 13 insertions, 6 deletions

diff --git a/libgo/go/runtime/malloc_test.go b/libgo/go/runtime/malloc_test.go
index 7e83255..0bdc831 100644
--- a/libgo/go/runtime/malloc_test.go
+++ b/libgo/go/runtime/malloc_test.go
@@ -35,14 +35,14 @@ func TestMemStats(t *testing.T) {
 	st := new(MemStats)
 	ReadMemStats(st)
 
-	nz := func(x interface{}) error {
+	nz := func(x any) error {
 		if x != reflect.Zero(reflect.TypeOf(x)).Interface() {
 			return nil
 		}
 		return fmt.Errorf("zero value")
 	}
-	le := func(thresh float64) func(interface{}) error {
-		return func(x interface{}) error {
+	le := func(thresh float64) func(any) error {
+		return func(x any) error {
 			// These sanity tests aren't necessarily valid
 			// with high -test.count values, so only run
 			// them once.
@@ -56,8 +56,8 @@ func TestMemStats(t *testing.T) {
 			return fmt.Errorf("insanely high value (overflow?); want <= %v", thresh)
 		}
 	}
-	eq := func(x interface{}) func(interface{}) error {
-		return func(y interface{}) error {
+	eq := func(x any) func(any) error {
+		return func(y any) error {
 			if x == y {
 				return nil
 			}
@@ -66,7 +66,7 @@ func TestMemStats(t *testing.T) {
 	}
 	// Of the uint fields, HeapReleased, HeapIdle can be 0.
 	// PauseTotalNs can be 0 if timer resolution is poor.
-	fields := map[string][]func(interface{}) error{
+	fields := map[string][]func(any) error{
 		"Alloc": {nz, le(1e10)}, "TotalAlloc": {nz, le(1e11)}, "Sys": {nz, le(1e10)},
 		"Lookups": {eq(uint64(0))}, "Mallocs": {nz, le(1e10)}, "Frees": {nz, le(1e10)},
 		"HeapAlloc": {nz, le(1e10)}, "HeapSys": {nz, le(1e10)}, "HeapIdle": {le(1e10)},
@@ -200,6 +200,10 @@ func TestTinyAllocIssue37262(t *testing.T) {
 	runtime.GC()
 	runtime.GC()
 
+	// Disable preemption so we stay on one P's tiny allocator and
+	// nothing else allocates from it.
+	runtime.Acquirem()
+
 	// Make 1-byte allocations until we get a fresh tiny slot.
 	aligned := false
 	for i := 0; i < 16; i++ {
@@ -210,6 +214,7 @@ func TestTinyAllocIssue37262(t *testing.T) {
 		}
 	}
 	if !aligned {
+		runtime.Releasem()
 		t.Fatal("unable to get a fresh tiny slot")
 	}
 
@@ -231,6 +236,8 @@ func TestTinyAllocIssue37262(t *testing.T) {
 	tinyByteSink = nil
 	tinyUint32Sink = nil
 	tinyObj12Sink = nil
+
+	runtime.Releasem()
 }
 
 func TestPageCacheLeak(t *testing.T) {