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Clear read_fd_set if EINTR received

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Leaving bits uncleared set causes callbacks to be triggered even
though there are no events to process. Starting with D131160
we have a callback that makes blocking read calls over pipe which
was causing the lldb-server main loop to become unresponsive / blocked
on Android.

Reviewed By: labath

Differential Revision: https://reviews.llvm.org/D144240
This commit is contained in:
Emre Kultursay
2023-02-23 12:55:25 +01:00
committed by Pavel Labath
parent 52786141f9
commit d8bd179a17
1 changed files with 6 additions and 3 deletions
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9
lldb/source/Host/posix/MainLoopPosix.cpp
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@@ -156,9 +156,12 @@ Status MainLoopPosix::RunImpl::Poll() {
size_t sigset_len;
} extra_data = {&kernel_sigset, sizeof(kernel_sigset)};
if (syscall(__NR_pselect6, nfds, &read_fd_set, nullptr, nullptr, nullptr,
&extra_data) == -1 &&
errno != EINTR)
return Status(errno, eErrorTypePOSIX);
&extra_data) == -1) {
if (errno != EINTR)
return Status(errno, eErrorTypePOSIX);
else
FD_ZERO(&read_fd_set);
}
return Status();
}