1 files changed, 363 insertions, 0 deletions
diff --git a/src/runtime/testdata/testprog/deadlock.go b/src/runtime/testdata/testprog/deadlock.go
new file mode 100644
index 0000000..781acbd
--- /dev/null
+++ b/src/runtime/testdata/testprog/deadlock.go
@@ -0,0 +1,363 @@
+// Copyright 2015 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.
+
+package main
+
+import (
+	"fmt"
+	"runtime"
+	"runtime/debug"
+	"time"
+)
+
+func init() {
+	registerInit("InitDeadlock", InitDeadlock)
+	registerInit("NoHelperGoroutines", NoHelperGoroutines)
+
+	register("SimpleDeadlock", SimpleDeadlock)
+	register("LockedDeadlock", LockedDeadlock)
+	register("LockedDeadlock2", LockedDeadlock2)
+	register("GoexitDeadlock", GoexitDeadlock)
+	register("StackOverflow", StackOverflow)
+	register("ThreadExhaustion", ThreadExhaustion)
+	register("RecursivePanic", RecursivePanic)
+	register("RecursivePanic2", RecursivePanic2)
+	register("RecursivePanic3", RecursivePanic3)
+	register("RecursivePanic4", RecursivePanic4)
+	register("RecursivePanic5", RecursivePanic5)
+	register("GoexitExit", GoexitExit)
+	register("GoNil", GoNil)
+	register("MainGoroutineID", MainGoroutineID)
+	register("Breakpoint", Breakpoint)
+	register("GoexitInPanic", GoexitInPanic)
+	register("PanicAfterGoexit", PanicAfterGoexit)
+	register("RecoveredPanicAfterGoexit", RecoveredPanicAfterGoexit)
+	register("RecoverBeforePanicAfterGoexit", RecoverBeforePanicAfterGoexit)
+	register("RecoverBeforePanicAfterGoexit2", RecoverBeforePanicAfterGoexit2)
+	register("PanicTraceback", PanicTraceback)
+	register("GoschedInPanic", GoschedInPanic)
+	register("SyscallInPanic", SyscallInPanic)
+	register("PanicLoop", PanicLoop)
+}
+
+func SimpleDeadlock() {
+	select {}
+	panic("not reached")
+}
+
+func InitDeadlock() {
+	select {}
+	panic("not reached")
+}
+
+func LockedDeadlock() {
+	runtime.LockOSThread()
+	select {}
+}
+
+func LockedDeadlock2() {
+	go func() {
+		runtime.LockOSThread()
+		select {}
+	}()
+	time.Sleep(time.Millisecond)
+	select {}
+}
+
+func GoexitDeadlock() {
+	F := func() {
+		for i := 0; i < 10; i++ {
+		}
+	}
+
+	go F()
+	go F()
+	runtime.Goexit()
+}
+
+func StackOverflow() {
+	var f func() byte
+	f = func() byte {
+		var buf [64 << 10]byte
+		return buf[0] + f()
+	}
+	debug.SetMaxStack(1474560)
+	f()
+}
+
+func ThreadExhaustion() {
+	debug.SetMaxThreads(10)
+	c := make(chan int)
+	for i := 0; i < 100; i++ {
+		go func() {
+			runtime.LockOSThread()
+			c <- 0
+			select {}
+		}()
+		<-c
+	}
+}
+
+func RecursivePanic() {
+	func() {
+		defer func() {
+			fmt.Println(recover())
+		}()
+		var x [8192]byte
+		func(x [8192]byte) {
+			defer func() {
+				if err := recover(); err != nil {
+					panic("wrap: " + err.(string))
+				}
+			}()
+			panic("bad")
+		}(x)
+	}()
+	panic("again")
+}
+
+// Same as RecursivePanic, but do the first recover and the second panic in
+// separate defers, and make sure they are executed in the correct order.
+func RecursivePanic2() {
+	func() {
+		defer func() {
+			fmt.Println(recover())
+		}()
+		var x [8192]byte
+		func(x [8192]byte) {
+			defer func() {
+				panic("second panic")
+			}()
+			defer func() {
+				fmt.Println(recover())
+			}()
+			panic("first panic")
+		}(x)
+	}()
+	panic("third panic")
+}
+
+// Make sure that the first panic finished as a panic, even though the second
+// panic was recovered
+func RecursivePanic3() {
+	defer func() {
+		defer func() {
+			recover()
+		}()
+		panic("second panic")
+	}()
+	panic("first panic")
+}
+
+// Test case where a single defer recovers one panic but starts another panic. If
+// the second panic is never recovered, then the recovered first panic will still
+// appear on the panic stack (labeled '[recovered]') and the runtime stack.
+func RecursivePanic4() {
+	defer func() {
+		recover()
+		panic("second panic")
+	}()
+	panic("first panic")
+}
+
+// Test case where we have an open-coded defer higher up the stack (in two), and
+// in the current function (three) we recover in a defer while we still have
+// another defer to be processed.
+func RecursivePanic5() {
+	one()
+	panic("third panic")
+}
+
+//go:noinline
+func one() {
+	two()
+}
+
+//go:noinline
+func two() {
+	defer func() {
+	}()
+
+	three()
+}
+
+//go:noinline
+func three() {
+	defer func() {
+	}()
+
+	defer func() {
+		fmt.Println(recover())
+	}()
+
+	defer func() {
+		fmt.Println(recover())
+		panic("second panic")
+	}()
+
+	panic("first panic")
+}
+
+func GoexitExit() {
+	println("t1")
+	go func() {
+		time.Sleep(time.Millisecond)
+	}()
+	i := 0
+	println("t2")
+	runtime.SetFinalizer(&i, func(p *int) {})
+	println("t3")
+	runtime.GC()
+	println("t4")
+	runtime.Goexit()
+}
+
+func GoNil() {
+	defer func() {
+		recover()
+	}()
+	var f func()
+	go f()
+	select {}
+}
+
+func MainGoroutineID() {
+	panic("test")
+}
+
+func NoHelperGoroutines() {
+	i := 0
+	runtime.SetFinalizer(&i, func(p *int) {})
+	time.AfterFunc(time.Hour, func() {})
+	panic("oops")
+}
+
+func Breakpoint() {
+	runtime.Breakpoint()
+}
+
+func GoexitInPanic() {
+	go func() {
+		defer func() {
+			runtime.Goexit()
+		}()
+		panic("hello")
+	}()
+	runtime.Goexit()
+}
+
+type errorThatGosched struct{}
+
+func (errorThatGosched) Error() string {
+	runtime.Gosched()
+	return "errorThatGosched"
+}
+
+func GoschedInPanic() {
+	panic(errorThatGosched{})
+}
+
+type errorThatPrint struct{}
+
+func (errorThatPrint) Error() string {
+	fmt.Println("1")
+	fmt.Println("2")
+	return "3"
+}
+
+func SyscallInPanic() {
+	panic(errorThatPrint{})
+}
+
+func PanicAfterGoexit() {
+	defer func() {
+		panic("hello")
+	}()
+	runtime.Goexit()
+}
+
+func RecoveredPanicAfterGoexit() {
+	defer func() {
+		defer func() {
+			r := recover()
+			if r == nil {
+				panic("bad recover")
+			}
+		}()
+		panic("hello")
+	}()
+	runtime.Goexit()
+}
+
+func RecoverBeforePanicAfterGoexit() {
+	// 1. defer a function that recovers
+	// 2. defer a function that panics
+	// 3. call goexit
+	// Goexit runs the #2 defer. Its panic
+	// is caught by the #1 defer.  For Goexit, we explicitly
+	// resume execution in the Goexit loop, instead of resuming
+	// execution in the caller (which would make the Goexit disappear!)
+	defer func() {
+		r := recover()
+		if r == nil {
+			panic("bad recover")
+		}
+	}()
+	defer func() {
+		panic("hello")
+	}()
+	runtime.Goexit()
+}
+
+func RecoverBeforePanicAfterGoexit2() {
+	for i := 0; i < 2; i++ {
+		defer func() {
+		}()
+	}
+	// 1. defer a function that recovers
+	// 2. defer a function that panics
+	// 3. call goexit
+	// Goexit runs the #2 defer. Its panic
+	// is caught by the #1 defer.  For Goexit, we explicitly
+	// resume execution in the Goexit loop, instead of resuming
+	// execution in the caller (which would make the Goexit disappear!)
+	defer func() {
+		r := recover()
+		if r == nil {
+			panic("bad recover")
+		}
+	}()
+	defer func() {
+		panic("hello")
+	}()
+	runtime.Goexit()
+}
+
+func PanicTraceback() {
+	pt1()
+}
+
+func pt1() {
+	defer func() {
+		panic("panic pt1")
+	}()
+	pt2()
+}
+
+func pt2() {
+	defer func() {
+		panic("panic pt2")
+	}()
+	panic("hello")
+}
+
+type panicError struct{}
+
+func (*panicError) Error() string {
+	panic("double error")
+}
+
+func PanicLoop() {
+	panic(&panicError{})
+}