YugabyteDB (2.13.0.0-b42, bfc6a6643e7399ac8a0e81d06a3ee6d6571b33ab)

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// Portions Copyright (c) YugaByte, Inc.

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// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except

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#include "yb/util/fault_injection.h"

#include <sys/resource.h>

#include <sys/time.h>

#include "yb/gutil/once.h"

#include "yb/util/debug/leakcheck_disabler.h"

#include "yb/util/logging.h"

#include "yb/util/monotime.h"

#include "yb/util/random.h"

#include "yb/util/random_util.h"

namespace yb {

namespace fault_injection {

namespace {

GoogleOnceType g_random_once;

Random* g_random;

void InitRandom() {

  LOG(WARNING) << "FAULT INJECTION ENABLED!";

  LOG(WARNING) << "THIS SERVER MAY CRASH!";

  debug::ScopedLeakCheckDisabler d;

  g_random = new Random(GetRandomSeed32());

  ANNOTATE_BENIGN_RACE_SIZED(g_random, sizeof(Random),

                             "Racy random numbers are OK");

}

} // anonymous namespace

void DoMaybeFault(const char* fault_str, double fraction) {

  GoogleOnceInit(&g_random_once, InitRandom);

  if (fraction == 0.0 || PREDICT_TRUE(g_random->NextDoubleFraction() >= fraction)) {

    return;

  }

  // Disable core dumps -- it's not useful to get a core dump when we're purposefully crashing, and

  // some tests cause lots of server crashes in a loop. This avoids filling up the disk with useless

  // cores.

  DisableCoreDumps();

  LOG(FATAL) << "Injected fault: " << fault_str;

}

void DoInjectRandomLatency(double max_ms) {

  GoogleOnceInit(&g_random_once, InitRandom);

  SleepFor(MonoDelta::FromMilliseconds(g_random->NextDoubleFraction() * max_ms));

}

} // namespace fault_injection

} // namespace yb