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95 lines
2.8 KiB
95 lines
2.8 KiB
4 months ago
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//===-- HostProcessPosix.cpp ----------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/Host/Host.h"
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#include "lldb/Host/FileSystem.h"
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#include "lldb/Host/posix/HostProcessPosix.h"
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#include "llvm/ADT/STLExtras.h"
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#include <csignal>
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#include <limits.h>
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#include <unistd.h>
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using namespace lldb_private;
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namespace {
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const int kInvalidPosixProcess = 0;
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}
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HostProcessPosix::HostProcessPosix()
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: HostNativeProcessBase(kInvalidPosixProcess) {}
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HostProcessPosix::HostProcessPosix(lldb::process_t process)
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: HostNativeProcessBase(process) {}
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HostProcessPosix::~HostProcessPosix() {}
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Status HostProcessPosix::Signal(int signo) const {
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if (m_process == kInvalidPosixProcess) {
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Status error;
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error.SetErrorString("HostProcessPosix refers to an invalid process");
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return error;
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}
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return HostProcessPosix::Signal(m_process, signo);
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}
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Status HostProcessPosix::Signal(lldb::process_t process, int signo) {
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Status error;
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if (-1 == ::kill(process, signo))
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error.SetErrorToErrno();
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return error;
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}
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Status HostProcessPosix::Terminate() { return Signal(SIGKILL); }
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Status HostProcessPosix::GetMainModule(FileSpec &file_spec) const {
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Status error;
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// Use special code here because proc/[pid]/exe is a symbolic link.
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char link_path[PATH_MAX];
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if (snprintf(link_path, PATH_MAX, "/proc/%" PRIu64 "/exe", m_process) != 1) {
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error.SetErrorString("Unable to build /proc/<pid>/exe string");
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return error;
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}
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error = FileSystem::Instance().Readlink(FileSpec(link_path), file_spec);
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if (!error.Success())
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return error;
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// If the binary has been deleted, the link name has " (deleted)" appended.
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// Remove if there.
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if (file_spec.GetFilename().GetStringRef().endswith(" (deleted)")) {
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const char *filename = file_spec.GetFilename().GetCString();
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static const size_t deleted_len = strlen(" (deleted)");
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const size_t len = file_spec.GetFilename().GetLength();
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file_spec.GetFilename().SetCStringWithLength(filename, len - deleted_len);
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}
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return error;
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}
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lldb::pid_t HostProcessPosix::GetProcessId() const { return m_process; }
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bool HostProcessPosix::IsRunning() const {
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if (m_process == kInvalidPosixProcess)
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return false;
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// Send this process the null signal. If it succeeds the process is running.
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Status error = Signal(0);
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return error.Success();
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}
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llvm::Expected<HostThread> HostProcessPosix::StartMonitoring(
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const Host::MonitorChildProcessCallback &callback, bool monitor_signals) {
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return Host::StartMonitoringChildProcess(callback, m_process,
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monitor_signals);
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}
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