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8f1e2d4ef7
If we run 'go test ./...' in the misc module, we don't want to see errors for these standalone files. We could instead add +ignore tags to each file individually, but this is exactly what a testdata directory is for. Updates #30228 Change-Id: I7047ad888dd6aff701f5982d58b6a79f6a487c58 Reviewed-on: https://go-review.googlesource.com/c/163417 Run-TryBot: Bryan C. Mills <bcmills@google.com> Reviewed-by: Jay Conrod <jayconrod@google.com>
51 lines
878 B
Go
51 lines
878 B
Go
// 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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