1 files changed, 94 insertions, 0 deletions
diff --git a/contrib/llvm-project/lldb/source/Host/posix/HostProcessPosix.cpp b/contrib/llvm-project/lldb/source/Host/posix/HostProcessPosix.cpp
new file mode 100644
index 000000000000..cc187d442468
--- /dev/null
+++ b/contrib/llvm-project/lldb/source/Host/posix/HostProcessPosix.cpp
@@ -0,0 +1,94 @@
+//===-- HostProcessPosix.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 "lldb/Host/Host.h"
+#include "lldb/Host/FileSystem.h"
+#include "lldb/Host/posix/HostProcessPosix.h"
+
+#include "llvm/ADT/STLExtras.h"
+
+#include <csignal>
+#include <limits.h>
+#include <unistd.h>
+
+using namespace lldb_private;
+
+namespace {
+const int kInvalidPosixProcess = 0;
+}
+
+HostProcessPosix::HostProcessPosix()
+    : HostNativeProcessBase(kInvalidPosixProcess) {}
+
+HostProcessPosix::HostProcessPosix(lldb::process_t process)
+    : HostNativeProcessBase(process) {}
+
+HostProcessPosix::~HostProcessPosix() {}
+
+Status HostProcessPosix::Signal(int signo) const {
+  if (m_process == kInvalidPosixProcess) {
+    Status error;
+    error.SetErrorString("HostProcessPosix refers to an invalid process");
+    return error;
+  }
+
+  return HostProcessPosix::Signal(m_process, signo);
+}
+
+Status HostProcessPosix::Signal(lldb::process_t process, int signo) {
+  Status error;
+
+  if (-1 == ::kill(process, signo))
+    error.SetErrorToErrno();
+
+  return error;
+}
+
+Status HostProcessPosix::Terminate() { return Signal(SIGKILL); }
+
+Status HostProcessPosix::GetMainModule(FileSpec &file_spec) const {
+  Status error;
+
+  // Use special code here because proc/[pid]/exe is a symbolic link.
+  char link_path[PATH_MAX];
+  if (snprintf(link_path, PATH_MAX, "/proc/%" PRIu64 "/exe", m_process) != 1) {
+    error.SetErrorString("Unable to build /proc/<pid>/exe string");
+    return error;
+  }
+
+  error = FileSystem::Instance().Readlink(FileSpec(link_path), file_spec);
+  if (!error.Success())
+    return error;
+
+  // If the binary has been deleted, the link name has " (deleted)" appended.
+  // Remove if there.
+  if (file_spec.GetFilename().GetStringRef().endswith(" (deleted)")) {
+    const char *filename = file_spec.GetFilename().GetCString();
+    static const size_t deleted_len = strlen(" (deleted)");
+    const size_t len = file_spec.GetFilename().GetLength();
+    file_spec.GetFilename().SetCStringWithLength(filename, len - deleted_len);
+  }
+  return error;
+}
+
+lldb::pid_t HostProcessPosix::GetProcessId() const { return m_process; }
+
+bool HostProcessPosix::IsRunning() const {
+  if (m_process == kInvalidPosixProcess)
+    return false;
+
+  // Send this process the null signal.  If it succeeds the process is running.
+  Status error = Signal(0);
+  return error.Success();
+}
+
+llvm::Expected<HostThread> HostProcessPosix::StartMonitoring(
+    const Host::MonitorChildProcessCallback &callback, bool monitor_signals) {
+  return Host::StartMonitoringChildProcess(callback, m_process,
+                                           monitor_signals);
+}