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037ac2bd84
Shrinks the size of things that can be stack allocated from
10M to 128k for declared variables and from 64k to 16k for
implicit allocations (new(T), &T{}, etc).
Usage: "go build -gcflags -smallframes hello.go"
An earlier GOEXPERIMENT version of this caused only one
problem, when a gc-should-detect-oversize-stack test no
longer had an oversized stack to detect. The change was
converted to a flag to make it easier to access (for
diagnosing "long" GC-related single-thread pauses) and to
remove interference with the test.
Includes test to verify behavior.
Updates #27732.
Change-Id: I1255d484331e77185e07c78389a8b594041204c2
Reviewed-on: https://go-review.googlesource.com/c/go/+/180817
Run-TryBot: David Chase <drchase@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
24 lines
488 B
Go
24 lines
488 B
Go
// errorcheck -0 -m -l -smallframes -newescape=true
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// Copyright 2019 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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// This checks that the -smallframes flag forces a large variable to heap.
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package main
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const (
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bufferLen = 200000
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)
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type kbyte []byte
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type circularBuffer [bufferLen]kbyte
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var sink byte
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func main() {
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var c circularBuffer // ERROR "moved to heap: c$"
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sink = c[0][0]
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}
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