================ @@ -0,0 +1,110 @@ +//===-- MemoryMonitor.cpp -------------------------------------------------===// +// +// 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 "lldb/Host/MemoryMonitor.h" +#include "lldb/Host/HostThread.h" +#include "lldb/Host/ThreadLauncher.h" +#include "lldb/Utility/LLDBLog.h" +#include "lldb/Utility/Log.h" +#include "llvm/ADT/ScopeExit.h" +#include "llvm/Support/Error.h" +#include <atomic> +#include <cstddef> +#include <cstdio> +#include <cstring> + +#if defined(__linux__) +#include <fcntl.h> +#include <poll.h> +#include <unistd.h> +#endif + +#if defined(_WIN32) +#include <memoryapi.h> +#include <synchapi.h> +#endif + +using namespace lldb_private; + +class MemoryMonitorPoll : public MemoryMonitor { +public: + using MemoryMonitor::MemoryMonitor; + + lldb::thread_result_t MonitorThread() { +#if defined(__linux__) + struct pollfd fds; + fds.fd = open("/proc/pressure/memory", O_RDWR | O_NONBLOCK); + if (fds.fd < 0) + return {}; + fds.events = POLLPRI; + + auto cleanup = llvm::make_scope_exit([&]() { close(fds.fd); }); + + // Detect a 50ms stall in a 2 second time window. + const char trig[] = "some 50000 2000000"; + if (write(fds.fd, trig, strlen(trig) + 1) < 0) + return {}; + + while (!m_done) { + int n = poll(&fds, 1, g_timeout); + if (n > 0) { + if (fds.revents & POLLERR) ---------------- walter-erquinigo wrote:
if there's an error, is there a way to restart the loop? https://github.com/llvm/llvm-project/pull/129332 _______________________________________________ lldb-commits mailing list lldb-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-commits
