[Fuzzer] Make InterruptHandler non-blocking for Fuchsia
The initial naive approach to simulate SIGINT on Fuchsia was to getchar
and look for ETX. This caused the InterruptHandler thread to lock stdin,
preventing musl's exit() from being able to close the stdio descriptors
and complete. This change uses select() instead.
Patch By: aarongreen
Differential Revision: https://reviews.llvm.org/D45636
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk/lib/fuzzer@330328 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/FuzzerUtilFuchsia.cpp b/FuzzerUtilFuchsia.cpp
index e9996ca..73974e5 100644
--- a/FuzzerUtilFuchsia.cpp
+++ b/FuzzerUtilFuchsia.cpp
@@ -45,8 +45,13 @@
}
void InterruptHandler() {
+ fd_set readfds;
// Ctrl-C sends ETX in Zircon.
- while (getchar() != 0x03);
+ do {
+ FD_ZERO(&readfds);
+ FD_SET(STDIN_FILENO, &readfds);
+ select(STDIN_FILENO + 1, &readfds, nullptr, nullptr, nullptr);
+ } while(!FD_ISSET(STDIN_FILENO, &readfds) || getchar() != 0x03);
Fuzzer::StaticInterruptCallback();
}