libfuzzer: fix compiler warnings
- unused sigaction/setitimer result (used in assert) - unchecked fscanf return value - signed/unsigned comparison llvm-svn: 262472
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d15c95a793
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@ -319,7 +319,7 @@ void TraceState::DFSanCmpCallback(uintptr_t PC, size_t CmpSize, size_t CmpType,
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AddMutation(Pos, CmpSize, Data - 1);
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}
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if (CmpSize > LR.End - LR.Beg)
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if (CmpSize > (size_t)(LR.End - LR.Beg))
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AddMutation(LR.Beg, (unsigned)(LR.End - LR.Beg), Data);
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@ -19,6 +19,7 @@
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#include <signal.h>
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#include <sstream>
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#include <unistd.h>
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#include <errno.h>
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namespace fuzzer {
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@ -84,14 +85,18 @@ static void SetSigaction(int signum,
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struct sigaction sigact;
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memset(&sigact, 0, sizeof(sigact));
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sigact.sa_sigaction = callback;
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int Res = sigaction(signum, &sigact, 0);
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assert(Res == 0);
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if (sigaction(signum, &sigact, 0)) {
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Printf("libFuzzer: sigaction failed with %d\n", errno);
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exit(1);
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}
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}
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void SetTimer(int Seconds) {
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struct itimerval T {{Seconds, 0}, {Seconds, 0}};
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int Res = setitimer(ITIMER_REAL, &T, nullptr);
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assert(Res == 0);
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if (setitimer(ITIMER_REAL, &T, nullptr)) {
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Printf("libFuzzer: setitimer failed with %d\n", errno);
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exit(1);
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}
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SetSigaction(SIGALRM, AlarmHandler);
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}
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@ -105,7 +110,8 @@ void SetSigIntHandler() { SetSigaction(SIGINT, InterruptHandler); }
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int NumberOfCpuCores() {
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FILE *F = popen("nproc", "r");
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int N = 0;
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fscanf(F, "%d", &N);
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if (fscanf(F, "%d", &N) != 1)
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N = 1;
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fclose(F);
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return N;
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}
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