| //===-- 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 |