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linux-user: Restart fork() if signals pending

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If there is a signal pending during fork() the signal handler will
erroneously be called in both the parent and child, so handle any
pending signals first.

Signed-off-by: Timothy Edward Baldwin <T.E.Baldwin99@members.leeds.ac.uk>
Message-id: 1441497448-32489-20-git-send-email-T.E.Baldwin99@members.leeds.ac.uk
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This commit is contained in:
Timothy E Baldwin 2016-05-27 15:51:58 +01:00 committed by Riku Voipio
parent bef653d92e
commit 7d92d34ee4
1 changed files with 5 additions and 0 deletions
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5
linux-user/syscall.c
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@ -5437,6 +5437,11 @@ static int do_fork(CPUArchState *env, unsigned int flags, abi_ulong newsp,
if ((flags & ~(CSIGNAL | CLONE_NPTL_FLAGS2)) != 0) {
return -TARGET_EINVAL;
}
if (block_signals()) {
return -TARGET_ERESTARTSYS;
}
fork_start();
ret = fork();
if (ret == 0) {