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The funcdata is encoded as varint, with the upper limit set to 1e9. However, the stack offsets could be up to 1<<30. Thus emitOpenDeferInfo will trigger an ICE for function with large frame size. By using binary.PutUvarint, the frame offset could be encoded correctly for value larger than 1<<35, allow the compiler to report the error. Further, the runtime also do validation when reading in the funcdata value, so a bad offset won't likely cause mis-behavior. Fixes #52697 Change-Id: I084c243c5d24c5d31cc22d5b439f0889e42b107c Reviewed-on: https://go-review.googlesource.com/c/go/+/535077 LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Matthew Dempsky <mdempsky@google.com> Reviewed-by: Than McIntosh <thanm@google.com> Auto-Submit: Cuong Manh Le <cuong.manhle.vn@gmail.com>
26 lines
459 B
Go
26 lines
459 B
Go
// errorcheck
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// Copyright 2023 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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//go:build !386 && !amd64p32 && !arm && !mips && !mipsle
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package main
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func g() { // GC_ERROR "stack frame too large"
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xs := [3000 * 2000][33]int{}
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for _, x := range xs {
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if len(x) > 50 {
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}
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}
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}
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func main() { // GC_ERROR "stack frame too large"
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defer f()
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g()
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}
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func f() {}
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