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//===-- common.cpp ----------------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "rss_limit_checker.h"
#include "atomic_helpers.h"
#include "string_utils.h"
namespace scudo {
void RssLimitChecker::check(u64 NextCheck) {
// The interval for the checks is 250ms.
static constexpr u64 CheckInterval = 250 * 1000000;
// Early return in case another thread already did the calculation.
if (!atomic_compare_exchange_strong(&RssNextCheckAtNS, &NextCheck,
getMonotonicTime() + CheckInterval,
memory_order_relaxed)) {
return;
}
const uptr CurrentRssMb = GetRSS() >> 20;
RssLimitExceeded Result = RssLimitExceeded::Neither;
if (UNLIKELY(HardRssLimitMb && HardRssLimitMb < CurrentRssMb))
Result = RssLimitExceeded::Hard;
else if (UNLIKELY(SoftRssLimitMb && SoftRssLimitMb < CurrentRssMb))
Result = RssLimitExceeded::Soft;
atomic_store_relaxed(&RssLimitStatus, static_cast<u8>(Result));
}
} // namespace scudo
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