Imported Upstream version 1.4upstream/1.4

1 files changed, 0 insertions, 283 deletions

diff --git a/src/pkg/runtime/stack_test.go b/src/pkg/runtime/stack_test.go
deleted file mode 100644
index f0c599ac5..000000000
--- a/src/pkg/runtime/stack_test.go
+++ /dev/null
@@ -1,283 +0,0 @@
-// 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.
-
-package runtime_test
-
-import (
-	. "runtime"
-	"sync"
-	"testing"
-	"time"
-	"unsafe"
-)
-
-// See stack.h.
-const (
-	StackGuard = 256
-	StackLimit = 128
-)
-
-// Test stack split logic by calling functions of every frame size
-// from near 0 up to and beyond the default segment size (4k).
-// Each of those functions reports its SP + stack limit, and then
-// the test (the caller) checks that those make sense.  By not
-// doing the actual checking and reporting from the suspect functions,
-// we minimize the possibility of crashes during the test itself.
-//
-// Exhaustive test for http://golang.org/issue/3310.
-// The linker used to get a few sizes near the segment size wrong:
-//
-// --- FAIL: TestStackSplit (0.01 seconds)
-// 	stack_test.go:22: after runtime_test.stack3812: sp=0x7f7818d5d078 < limit=0x7f7818d5d080
-// 	stack_test.go:22: after runtime_test.stack3816: sp=0x7f7818d5d078 < limit=0x7f7818d5d080
-// 	stack_test.go:22: after runtime_test.stack3820: sp=0x7f7818d5d070 < limit=0x7f7818d5d080
-// 	stack_test.go:22: after runtime_test.stack3824: sp=0x7f7818d5d070 < limit=0x7f7818d5d080
-// 	stack_test.go:22: after runtime_test.stack3828: sp=0x7f7818d5d068 < limit=0x7f7818d5d080
-// 	stack_test.go:22: after runtime_test.stack3832: sp=0x7f7818d5d068 < limit=0x7f7818d5d080
-// 	stack_test.go:22: after runtime_test.stack3836: sp=0x7f7818d5d060 < limit=0x7f7818d5d080
-// 	stack_test.go:22: after runtime_test.stack3840: sp=0x7f7818d5d060 < limit=0x7f7818d5d080
-// 	stack_test.go:22: after runtime_test.stack3844: sp=0x7f7818d5d058 < limit=0x7f7818d5d080
-// 	stack_test.go:22: after runtime_test.stack3848: sp=0x7f7818d5d058 < limit=0x7f7818d5d080
-// 	stack_test.go:22: after runtime_test.stack3852: sp=0x7f7818d5d050 < limit=0x7f7818d5d080
-// 	stack_test.go:22: after runtime_test.stack3856: sp=0x7f7818d5d050 < limit=0x7f7818d5d080
-// 	stack_test.go:22: after runtime_test.stack3860: sp=0x7f7818d5d048 < limit=0x7f7818d5d080
-// 	stack_test.go:22: after runtime_test.stack3864: sp=0x7f7818d5d048 < limit=0x7f7818d5d080
-// FAIL
-func TestStackSplit(t *testing.T) {
-	for _, f := range splitTests {
-		sp, guard := f()
-		bottom := guard - StackGuard
-		if sp < bottom+StackLimit {
-			fun := FuncForPC(**(**uintptr)(unsafe.Pointer(&f)))
-			t.Errorf("after %s: sp=%#x < limit=%#x (guard=%#x, bottom=%#x)",
-				fun.Name(), sp, bottom+StackLimit, guard, bottom)
-		}
-	}
-}
-
-var Used byte
-
-func use(buf []byte) {
-	for _, c := range buf {
-		Used += c
-	}
-}
-
-// TestStackMem measures per-thread stack segment cache behavior.
-// The test consumed up to 500MB in the past.
-func TestStackMem(t *testing.T) {
-	const (
-		BatchSize      = 32
-		BatchCount     = 256
-		ArraySize      = 1024
-		RecursionDepth = 128
-	)
-	if testing.Short() {
-		return
-	}
-	defer GOMAXPROCS(GOMAXPROCS(BatchSize))
-	s0 := new(MemStats)
-	ReadMemStats(s0)
-	for b := 0; b < BatchCount; b++ {
-		c := make(chan bool, BatchSize)
-		for i := 0; i < BatchSize; i++ {
-			go func() {
-				var f func(k int, a [ArraySize]byte)
-				f = func(k int, a [ArraySize]byte) {
-					if k == 0 {
-						time.Sleep(time.Millisecond)
-						return
-					}
-					f(k-1, a)
-				}
-				f(RecursionDepth, [ArraySize]byte{})
-				c <- true
-			}()
-		}
-		for i := 0; i < BatchSize; i++ {
-			<-c
-		}
-
-		// The goroutines have signaled via c that they are ready to exit.
-		// Give them a chance to exit by sleeping. If we don't wait, we
-		// might not reuse them on the next batch.
-		time.Sleep(10 * time.Millisecond)
-	}
-	s1 := new(MemStats)
-	ReadMemStats(s1)
-	consumed := s1.StackSys - s0.StackSys
-	t.Logf("Consumed %vMB for stack mem", consumed>>20)
-	estimate := uint64(8 * BatchSize * ArraySize * RecursionDepth) // 8 is to reduce flakiness.
-	if consumed > estimate {
-		t.Fatalf("Stack mem: want %v, got %v", estimate, consumed)
-	}
-	// Due to broken stack memory accounting (http://golang.org/issue/7468),
-	// StackInuse can decrease during function execution, so we cast the values to int64.
-	inuse := int64(s1.StackInuse) - int64(s0.StackInuse)
-	t.Logf("Inuse %vMB for stack mem", inuse>>20)
-	if inuse > 4<<20 {
-		t.Fatalf("Stack inuse: want %v, got %v", 4<<20, inuse)
-	}
-}
-
-// Test stack growing in different contexts.
-func TestStackGrowth(t *testing.T) {
-	switch GOARCH {
-	case "386", "arm":
-		t.Skipf("skipping test on %q; see issue 8083", GOARCH)
-	}
-	t.Parallel()
-	var wg sync.WaitGroup
-
-	// in a normal goroutine
-	wg.Add(1)
-	go func() {
-		defer wg.Done()
-		growStack()
-	}()
-	wg.Wait()
-
-	// in locked goroutine
-	wg.Add(1)
-	go func() {
-		defer wg.Done()
-		LockOSThread()
-		growStack()
-		UnlockOSThread()
-	}()
-	wg.Wait()
-
-	// in finalizer
-	wg.Add(1)
-	go func() {
-		defer wg.Done()
-		done := make(chan bool)
-		go func() {
-			s := new(string)
-			SetFinalizer(s, func(ss *string) {
-				growStack()
-				done <- true
-			})
-			s = nil
-			done <- true
-		}()
-		<-done
-		GC()
-		select {
-		case <-done:
-		case <-time.After(20 * time.Second):
-			t.Fatal("finalizer did not run")
-		}
-	}()
-	wg.Wait()
-}
-
-// ... and in init
-//func init() {
-//	growStack()
-//}
-
-func growStack() {
-	n := 1 << 10
-	if testing.Short() {
-		n = 1 << 8
-	}
-	for i := 0; i < n; i++ {
-		x := 0
-		growStackIter(&x, i)
-		if x != i+1 {
-			panic("stack is corrupted")
-		}
-	}
-	GC()
-}
-
-// This function is not an anonimous func, so that the compiler can do escape
-// analysis and place x on stack (and subsequently stack growth update the pointer).
-func growStackIter(p *int, n int) {
-	if n == 0 {
-		*p = n + 1
-		GC()
-		return
-	}
-	*p = n + 1
-	x := 0
-	growStackIter(&x, n-1)
-	if x != n {
-		panic("stack is corrupted")
-	}
-}
-
-func TestStackGrowthCallback(t *testing.T) {
-	t.Parallel()
-	var wg sync.WaitGroup
-
-	// test stack growth at chan op
-	wg.Add(1)
-	go func() {
-		defer wg.Done()
-		c := make(chan int, 1)
-		growStackWithCallback(func() {
-			c <- 1
-			<-c
-		})
-	}()
-
-	// test stack growth at map op
-	wg.Add(1)
-	go func() {
-		defer wg.Done()
-		m := make(map[int]int)
-		growStackWithCallback(func() {
-			_, _ = m[1]
-			m[1] = 1
-		})
-	}()
-
-	// test stack growth at goroutine creation
-	wg.Add(1)
-	go func() {
-		defer wg.Done()
-		growStackWithCallback(func() {
-			done := make(chan bool)
-			go func() {
-				done <- true
-			}()
-			<-done
-		})
-	}()
-
-	wg.Wait()
-}
-
-func growStackWithCallback(cb func()) {
-	var f func(n int)
-	f = func(n int) {
-		if n == 0 {
-			cb()
-			return
-		}
-		f(n - 1)
-	}
-	for i := 0; i < 1<<10; i++ {
-		f(i)
-	}
-}
-
-// TestDeferPtrs tests the adjustment of Defer's argument pointers (p aka &y)
-// during a stack copy.
-func set(p *int, x int) {
-	*p = x
-}
-func TestDeferPtrs(t *testing.T) {
-	var y int
-
-	defer func() {
-		if y != 42 {
-			t.Errorf("defer's stack references were not adjusted appropriately")
-		}
-	}()
-	defer set(&y, 42)
-	growStack()
-}