Adding upstream version 1.19.8.upstream/1.19.8upstream

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

1 files changed, 95 insertions, 0 deletions

diff --git a/test/fixedbugs/issue10958.go b/test/fixedbugs/issue10958.go
new file mode 100644
index 0000000..52487fb
--- /dev/null
+++ b/test/fixedbugs/issue10958.go
@@ -0,0 +1,95 @@
+// +build !nacl,!js,disabled_see_issue_18589
+// buildrun -t 10  -gcflags=-d=ssa/insert_resched_checks/on,ssa/check/on
+
+// Copyright 2016 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.
+
+// Test is disabled because it flakes when run in all.bash
+// on some platforms, but is useful standalone to verify
+// that rescheduling checks are working (and we may wish
+// to investigate the flake, since it suggests that the
+// loop rescheduling check may not work right on those
+// platforms).
+
+// This checks to see that call-free infinite loops do not
+// block garbage collection.  IF YOU RUN IT STANDALONE without
+// -gcflags=-d=ssa/insert_resched_checks/on in a not-experimental
+// build, it should hang.
+
+package main
+
+import (
+	"runtime"
+)
+
+var someglobal1 int
+var someglobal2 int
+var someglobal3 int
+
+//go:noinline
+func f() {}
+
+func standinacorner1() {
+	for someglobal1&1 == 0 {
+		someglobal1++
+		someglobal1++
+	}
+}
+
+func standinacorner2(i int) {
+	// contains an irreducible loop containing changes to memory
+	if i != 0 {
+		goto midloop
+	}
+
+loop:
+	if someglobal2&1 != 0 {
+		goto done
+	}
+	someglobal2++
+midloop:
+	someglobal2++
+	goto loop
+
+done:
+	return
+}
+
+func standinacorner3() {
+	for someglobal3&1 == 0 {
+		if someglobal3&2 != 0 {
+			for someglobal3&3 == 2 {
+				someglobal3++
+				someglobal3++
+				someglobal3++
+				someglobal3++
+			}
+		}
+		someglobal3++
+		someglobal3++
+		someglobal3++
+		someglobal3++
+	}
+}
+
+func main() {
+	go standinacorner1()
+	go standinacorner2(0)
+	go standinacorner3()
+	// println("About to stand in a corner1")
+	for someglobal1 == 0 {
+		runtime.Gosched()
+	}
+	// println("About to stand in a corner2")
+	for someglobal2 == 0 {
+		runtime.Gosched()
+	}
+	// println("About to stand in a corner3")
+	for someglobal3 == 0 {
+		runtime.Gosched()
+	}
+	// println("About to GC")
+	runtime.GC()
+	// println("Success")
+}