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Diffstat (limited to 'libgo/go/runtime/mallocrand.go')
-rw-r--r--libgo/go/runtime/mallocrand.go93
1 files changed, 0 insertions, 93 deletions
diff --git a/libgo/go/runtime/mallocrand.go b/libgo/go/runtime/mallocrand.go
deleted file mode 100644
index f1bcb89cfa4..00000000000
--- a/libgo/go/runtime/mallocrand.go
+++ /dev/null
@@ -1,93 +0,0 @@
-// Copyright 2009 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.
-
-// +build ignore
-
-// Random malloc test.
-
-package main
-
-import (
- "flag"
- "math/rand"
- "runtime"
- "unsafe"
-)
-
-var chatty = flag.Bool("v", false, "chatty")
-
-var footprint uint64
-var allocated uint64
-
-func bigger() {
- memstats := new(runtime.MemStats)
- runtime.ReadMemStats(memstats)
- if f := memstats.Sys; footprint < f {
- footprint = f
- if *chatty {
- println("Footprint", footprint, " for ", allocated)
- }
- if footprint > 1e9 {
- println("too big")
- panic("fail")
- }
- }
-}
-
-// Prime the data structures by allocating one of
-// each block in order. After this, there should be
-// little reason to ask for more memory from the OS.
-func prime() {
- for i := 0; i < 16; i++ {
- b := runtime.Alloc(1 << uint(i))
- runtime.Free(b)
- }
- for i := uintptr(0); i < 256; i++ {
- b := runtime.Alloc(i << 12)
- runtime.Free(b)
- }
-}
-
-func memset(b *byte, c byte, n uintptr) {
- np := uintptr(n)
- for i := uintptr(0); i < np; i++ {
- *(*byte)(unsafe.Pointer(uintptr(unsafe.Pointer(b)) + i)) = c
- }
-}
-
-func main() {
- flag.Parse()
- // prime()
- var blocks [1]struct {
- base *byte
- siz uintptr
- }
- for i := 0; i < 1<<10; i++ {
- if i%(1<<10) == 0 && *chatty {
- println(i)
- }
- b := rand.Int() % len(blocks)
- if blocks[b].base != nil {
- // println("Free", blocks[b].siz, blocks[b].base)
- runtime.Free(blocks[b].base)
- blocks[b].base = nil
- allocated -= uint64(blocks[b].siz)
- continue
- }
- siz := uintptr(rand.Int() >> (11 + rand.Uint32()%20))
- base := runtime.Alloc(siz)
- // ptr := uintptr(syscall.BytePtr(base))+uintptr(siz/2)
- // obj, size, ref, ok := allocator.find(ptr)
- // if obj != base || *ref != 0 || !ok {
- // println("find", siz, obj, ref, ok)
- // panic("fail")
- // }
- blocks[b].base = base
- blocks[b].siz = siz
- allocated += uint64(siz)
- // println("Alloc", siz, base)
- memset(base, 0xbb, siz)
- bigger()
- }
-}