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cmd/compile: reject large argument areas
Extend stack frame limit of 1GB to include large argument/return areas. Argument/return areas are part of the parent frame, not the frame itself, so they need to be handled separately. Fixes #25507. Change-Id: I309298a58faee3e7c1dac80bd2f1166c82460087 Reviewed-on: https://go-review.googlesource.com/115036 Run-TryBot: Keith Randall <khr@golang.org> Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
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@ -257,7 +257,8 @@ const maxStackSize = 1 << 30
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// worker indicates which of the backend workers is doing the processing.
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func compileSSA(fn *Node, worker int) {
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f := buildssa(fn, worker)
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if f.Frontend().(*ssafn).stksize >= maxStackSize {
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// Note: check arg size to fix issue 25507.
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if f.Frontend().(*ssafn).stksize >= maxStackSize || fn.Type.ArgWidth() >= maxStackSize {
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largeStackFramesMu.Lock()
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largeStackFrames = append(largeStackFrames, fn.Pos)
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largeStackFramesMu.Unlock()
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@ -174,6 +174,7 @@ func TestStdFixed(t *testing.T) {
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"issue20529.go", // go/types does not have constraints on stack size
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"issue22200.go", // go/types does not have constraints on stack size
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"issue22200b.go", // go/types does not have constraints on stack size
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"issue25507.go", // go/types does not have constraints on stack size
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)
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}
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29
test/fixedbugs/issue25507.go
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29
test/fixedbugs/issue25507.go
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@ -0,0 +1,29 @@
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// errorcheck
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// Copyright 2018 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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// We have a limit of 1GB for stack frames.
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// Test that we extend that limit to include large argument/return areas.
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// Argument/return areas are part of the parent frame, not the frame itself,
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// so they need to be handled separately.
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package main
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// >1GB to trigger failure, <2GB to work on 32-bit platforms.
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type large struct {
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b [1500000000]byte
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}
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func (x large) f1() int { // ERROR "stack frame too large"
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return 5
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}
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func f2(x large) int { // ERROR "stack frame too large"
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return 5
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}
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func f3() (x large, i int) { // ERROR "stack frame too large"
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return
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}
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