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// $G $D/$F.go && $L $F.$A && ./$A.out
// 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.
// Repeated malloc test.
package main
import (
"flag";
"malloc"
)
var chatty = flag.Bool("v", false, "chatty");
var oldsys uint64;
func bigger() {
if st := malloc.GetStats(); oldsys < st.Sys {
oldsys = st.Sys;
if *chatty {
println(st.Sys, " system bytes for ", st.Alloc, " Go bytes");
}
if st.Sys > 1e9 {
panicln("too big");
}
}
}
func main() {
flag.Parse();
malloc.GetStats().Alloc = 0; // ignore stacks
for i := 0; i < 1<<8; i++ {
for j := 1; j <= 1<<22; j<<=1 {
if i == 0 && *chatty {
println("First alloc:", j);
}
if a := malloc.GetStats().Alloc; a != 0 {
panicln("no allocations but stats report", a, "bytes allocated");
}
b := malloc.Alloc(uintptr(j));
during := malloc.GetStats().Alloc;
malloc.Free(b);
if a := malloc.GetStats().Alloc; a != 0 {
panic("allocated ", j, ": wrong stats: during=", during, " after=", a, " (want 0)");
}
bigger();
}
if i%(1<<10) == 0 && *chatty {
println(i);
}
if i == 0 {
if *chatty {
println("Primed", i);
}
// malloc.frozen = true;
}
}
}
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