runtime: move test programs out of source code, coalesce

Now there are just three programs to compile instead of many,
and repeated tests can reuse the compilation result instead of
rebuilding it.

Combined, these changes reduce the time spent testing runtime
during all.bash on my laptop from about 60 to about 30 seconds.
(All.bash itself runs in 5½ minutes.)

For #10571.

Change-Id: Ie2c1798b847f1a635a860d11dcdab14375319ae9
Reviewed-on: https://go-review.googlesource.com/18085
Reviewed-by: Austin Clements <austin@google.com>
Run-TryBot: Austin Clements <austin@google.com>

6 files changed, 374 insertions, 0 deletions

diff --git a/src/runtime/testdata/testprog/crash.go b/src/runtime/testdata/testprog/crash.go
new file mode 100644
index 0000000000..3d7c7c6aab
--- /dev/null
+++ b/src/runtime/testdata/testprog/crash.go
@@ -0,0 +1,45 @@
+// 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"
+)
+
+func init() {
+	register("Crash", Crash)
+}
+
+func test(name string) {
+	defer func() {
+		if x := recover(); x != nil {
+			fmt.Printf(" recovered")
+		}
+		fmt.Printf(" done\n")
+	}()
+	fmt.Printf("%s:", name)
+	var s *string
+	_ = *s
+	fmt.Print("SHOULD NOT BE HERE")
+}
+
+func testInNewThread(name string) {
+	c := make(chan bool)
+	go func() {
+		runtime.LockOSThread()
+		test(name)
+		c <- true
+	}()
+	<-c
+}
+
+func Crash() {
+	runtime.LockOSThread()
+	test("main")
+	testInNewThread("new-thread")
+	testInNewThread("second-new-thread")
+	test("main-again")
+}
diff --git a/src/runtime/testdata/testprog/deadlock.go b/src/runtime/testdata/testprog/deadlock.go
new file mode 100644
index 0000000000..7f0a0cd1e0
--- /dev/null
+++ b/src/runtime/testdata/testprog/deadlock.go
@@ -0,0 +1,173 @@
+// 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("GoexitExit", GoexitExit)
+	register("GoNil", GoNil)
+	register("MainGoroutineID", MainGoroutineID)
+	register("Breakpoint", Breakpoint)
+	register("GoexitInPanic", GoexitInPanic)
+	register("PanicAfterGoexit", PanicAfterGoexit)
+	register("RecoveredPanicAfterGoexit", RecoveredPanicAfterGoexit)
+
+}
+
+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")
+}
+
+func GoexitExit() {
+	go func() {
+		time.Sleep(time.Millisecond)
+	}()
+	i := 0
+	runtime.SetFinalizer(&i, func(p *int) {})
+	runtime.GC()
+	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()
+}
+
+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()
+}
diff --git a/src/runtime/testdata/testprog/gc.go b/src/runtime/testdata/testprog/gc.go
new file mode 100644
index 0000000000..9bb367c0d1
--- /dev/null
+++ b/src/runtime/testdata/testprog/gc.go
@@ -0,0 +1,74 @@
+// 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"
+	"os"
+	"runtime"
+	"time"
+)
+
+func init() {
+	register("GCFairness", GCFairness)
+	register("GCSys", GCSys)
+}
+
+func GCSys() {
+	runtime.GOMAXPROCS(1)
+	memstats := new(runtime.MemStats)
+	runtime.GC()
+	runtime.ReadMemStats(memstats)
+	sys := memstats.Sys
+
+	runtime.MemProfileRate = 0 // disable profiler
+
+	itercount := 100000
+	for i := 0; i < itercount; i++ {
+		workthegc()
+	}
+
+	// Should only be using a few MB.
+	// We allocated 100 MB or (if not short) 1 GB.
+	runtime.ReadMemStats(memstats)
+	if sys > memstats.Sys {
+		sys = 0
+	} else {
+		sys = memstats.Sys - sys
+	}
+	if sys > 16<<20 {
+		fmt.Printf("using too much memory: %d bytes\n", sys)
+		return
+	}
+	fmt.Printf("OK\n")
+}
+
+func workthegc() []byte {
+	return make([]byte, 1029)
+}
+
+func GCFairness() {
+	runtime.GOMAXPROCS(1)
+	f, err := os.Open("/dev/null")
+	if os.IsNotExist(err) {
+		// This test tests what it is intended to test only if writes are fast.
+		// If there is no /dev/null, we just don't execute the test.
+		fmt.Println("OK")
+		return
+	}
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+	for i := 0; i < 2; i++ {
+		go func() {
+			for {
+				f.Write([]byte("."))
+			}
+		}()
+	}
+	time.Sleep(10 * time.Millisecond)
+	fmt.Println("OK")
+}
diff --git a/src/runtime/testdata/testprog/main.go b/src/runtime/testdata/testprog/main.go
new file mode 100644
index 0000000000..5784865ea2
--- /dev/null
+++ b/src/runtime/testdata/testprog/main.go
@@ -0,0 +1,35 @@
+// 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 "os"
+
+var cmds = map[string]func(){}
+
+func register(name string, f func()) {
+	if cmds[name] != nil {
+		panic("duplicate registration: " + name)
+	}
+	cmds[name] = f
+}
+
+func registerInit(name string, f func()) {
+	if len(os.Args) >= 2 && os.Args[1] == name {
+		f()
+	}
+}
+
+func main() {
+	if len(os.Args) < 2 {
+		println("usage: "+os.Args[0]+" name-of-test")
+		return
+	}
+	f := cmds[os.Args[1]]
+	if f == nil {
+		println("unknown function: " + os.Args[1])
+		return
+	}
+	f()
+}
diff --git a/src/runtime/testdata/testprog/stringconcat.go b/src/runtime/testdata/testprog/stringconcat.go
new file mode 100644
index 0000000000..9dddf1969f
--- /dev/null
+++ b/src/runtime/testdata/testprog/stringconcat.go
@@ -0,0 +1,20 @@
+// 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 "strings"
+
+func init() {
+	register("stringconcat", stringconcat)
+}
+
+func stringconcat() {
+	s0 := strings.Repeat("0", 1<<10)
+	s1 := strings.Repeat("1", 1<<10)
+	s2 := strings.Repeat("2", 1<<10)
+	s3 := strings.Repeat("3", 1<<10)
+	s := s0 + s1 + s2 + s3
+	panic(s)
+}
diff --git a/src/runtime/testdata/testprog/syscall_windows.go b/src/runtime/testdata/testprog/syscall_windows.go
new file mode 100644
index 0000000000..73165be187
--- /dev/null
+++ b/src/runtime/testdata/testprog/syscall_windows.go
@@ -0,0 +1,27 @@
+// 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 "syscall"
+
+func init() {
+	register("RaiseException", RaiseException)
+	register("ZeroDivisionException", ZeroDivisionException)
+}
+
+func RaiseException() {
+	const EXCEPTION_NONCONTINUABLE = 1
+	mod := syscall.MustLoadDLL("kernel32.dll")
+	proc := mod.MustFindProc("RaiseException")
+	proc.Call(0xbad, EXCEPTION_NONCONTINUABLE, 0, 0)
+	println("RaiseException should not return")
+}
+
+func ZeroDivisionException() {
+	x := 1
+	y := 0
+	z := x / y
+	println(z)
+}