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https://github.com/burrowers/garble.git
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9d04637009
Added in Go 1.19, types like sync/atomic.Uint64 are handy,
because they ensure proper alignment even on 32-bit GOOSes.
However, this was done via a magic `type align64 struct{}`,
which the compiler spotted by name.
To keep that magic working, do not obfuscate the name.
Neither package path was being obfuscated,
as both packages contain compiler intrinsics already.
Fixes #686.
52 lines
987 B
Plaintext
52 lines
987 B
Plaintext
# amd64 can typically run 386 programs,
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# which is handy to actually make this test useful.
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# We assume that the same applies to arm64.
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# Note that darwin is an exception compared to linux and windows,
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# as darwin/386 and darwin/arm are not supported.
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[amd64] [!darwin] env GOARCH=386
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[arm64] [!darwin] env GOARCH=arm
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garble build
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exec ./main
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cmp stderr main.stderr
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[short] stop # no need to verify this with -short
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go build
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exec ./main
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cmp stderr main.stderr
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-- go.mod --
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module test/main
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go 1.20
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-- main.go --
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package main
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import (
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"sync"
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"sync/atomic"
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)
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var unalignedUint64 struct {
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// If sync/atomic's support in the compiler is broken,
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// then u64 is not aligned to 64 bits on 32-bit platforms,
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// and that may cause a panic.
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_ bool
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u64 atomic.Uint64
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}
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func main() {
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var wg sync.WaitGroup
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for i := 0; i < 10; i++ {
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wg.Add(1)
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go func() {
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unalignedUint64.u64.Add(2)
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wg.Done()
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}()
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}
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wg.Wait()
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println(unalignedUint64.u64.Load())
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}
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-- main.stderr --
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20
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