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[release-branch.go1.5] runtime: ignore rt_sigaction error if it is fo…

…r SIGRTMAX

A forward port of https://codereview.appspot.com/124900043/ which somehow
got lost somewhere.

Fixes #13024

Change-Id: Iab128899e65c51d90f6704e3e1b2fc9326e3a1c2
Reviewed-on: https://go-review.googlesource.com/16853
Reviewed-by: Russ Cox <rsc@golang.org>
Reviewed-on: https://go-review.googlesource.com/16986
Run-TryBot: Austin Clements <austin@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
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mwhudson authored and aclements committed Nov 12, 2015
1 parent a8e839b commit 20a053611b2ac6cdd760fd3d391e4f7ae2d72a77
Showing with 2 additions and 1 deletion.
  1. +2 −1 src/runtime/os1_linux.go
@@ -293,7 +293,8 @@ func setsig(i int32, fn uintptr, restart bool) {
fn = funcPC(sigtramp)
}
sa.sa_handler = fn
if rt_sigaction(uintptr(i), &sa, nil, unsafe.Sizeof(sa.sa_mask)) != 0 {
// Qemu rejects rt_sigaction of SIGRTMAX (64).
if rt_sigaction(uintptr(i), &sa, nil, unsafe.Sizeof(sa.sa_mask)) != 0 && i != 64 {
throw("rt_sigaction failure")
}
}

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