diff options
Diffstat (limited to 'libgo/go/runtime/mallocrand.go')
-rw-r--r-- | libgo/go/runtime/mallocrand.go | 93 |
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() - } -} |