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doc/go1.16: mention syscall.AllThreadsSyscall
For #1435 For #40700 Change-Id: I01d277617ab511c90b9663fc89e418402e5ee2be Reviewed-on: https://go-review.googlesource.com/c/go/+/285597 Trust: Ian Lance Taylor <iant@golang.org> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
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@ -934,6 +934,16 @@ func TestFoo(t *testing.T) {
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and related calls are now implemented.
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Previously, they returned an <code>syscall.EOPNOTSUPP</code> error.
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</p>
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<p><!-- CL 210639 -->
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On Linux, the new functions
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<a href="/pkg/syscall/#AllThreadsSyscall"><code>AllThreadsSyscall</code></a>
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and <a href="/pkg/syscall/#AllThreadsSyscall6"><code>AllThreadsSyscall6</code></a>
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may be used to make a system call on all Go threads in the process.
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These functions may only be used by programs that do not use cgo;
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if a program uses cgo, they will always return
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<a href="/pkg/syscall/#ENOTSUP"><code>syscall.ENOTSUP</code></a>.
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</p>
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</dd>
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</dl><!-- syscall -->
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