mirror of
https://github.com/golang/go
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51 lines
879 B
Go
51 lines
879 B
Go
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// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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// The memory profiler can call copy from a slice on the system stack,
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// which msan used to think meant a reference to uninitialized memory.
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/*
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#include <time.h>
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#include <unistd.h>
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extern void Nop(char*);
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// Use weak as a hack to permit defining a function even though we use export.
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void poison() __attribute__ ((weak));
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// Poison the stack.
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void poison() {
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char a[1024];
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Nop(&a[0]);
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}
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*/
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import "C"
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import (
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"runtime"
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)
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func main() {
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runtime.MemProfileRate = 1
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start(100)
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}
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func start(i int) {
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if i == 0 {
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return
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}
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C.poison()
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// Tie up a thread.
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// We won't actually wait for this sleep to complete.
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go func() { C.sleep(1) }()
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start(i - 1)
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}
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//export Nop
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func Nop(*C.char) {
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}
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