Create proc status reader

Author: Jlalond

lldb/source/Plugins/Process/Utility/CMakeLists.txt

@@ -6,6 +6,7 @@ add_lldb_library(lldbPluginProcessUtility
   HistoryUnwind.cpp
   InferiorCallPOSIX.cpp
   LinuxProcMaps.cpp
+  LinuxProcStatus.cpp
   LinuxSignals.cpp
   MemoryTagManagerAArch64MTE.cpp
   NativeProcessSoftwareSingleStep.cpp

lldb/source/Plugins/Process/Utility/LinuxProcStatus.cpp

@@ -0,0 +1,42 @@
+//===-- LinuxProcMaps.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 "LinuxProcStatus.h"
+#include <sstream>
+#include <string>
+#include <vector>
+
+static std::vector<std::string> SplitLines(llvm::StringRef proc_status) {
+  std::istringstream inputstream(proc_status.str());
+  std::vector<std::string> lines;
+  std::string line;
+  while (std::getline(inputstream, line)) {
+    lines.push_back(line);
+  }
+  return lines;
+}
+
+lldb_private::StructuredData::Dictionary
+ParseProcStatus(llvm::StringRef proc_status) {
+  std::vector<std::string> lines = SplitLines(proc_status);
+  lldb_private::StructuredData::Dictionary proc_status_data;
+  for (auto &str : lines) {
+    // proc/pid/status is a delineated by a colon, so we split all the lines
+    // and then return a structureddata of each name : value. We keep these
+    // all as text, and let the caller sort the type they want them as.
+    size_t colonPos = str.find(':');
+    if (colonPos == std::string::npos) {
+      continue;
+    }
+    std::string name = str.substr(0, colonPos);
+    std::string value = str.substr(colonPos + 1);
+    proc_status_data.AddStringItem(name, value);
+  }
+
+  return proc_status_data;
+}

lldb/source/Plugins/Process/Utility/LinuxProcStatus.h

@@ -0,0 +1,22 @@
+//===-- LinuxProcStatus.h ---------------------------------------*- 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLDB_SOURCE_PLUGINS_PROCESS_UTILITY_LINUXPROCSTATUS_H
+#define LLDB_SOURCE_PLUGINS_PROCESS_UTILITY_LINUXPROCSTATUS_H
+
+#include "lldb/Utility/StructuredData.h"
+#include "lldb/lldb-forward.h"
+#include "llvm/ADT/StringRef.h"
+
+namespace lldb_private {
+
+StructuredData::Dictionary ParseProcStatus(llvm::StringRef proc_status);
+
+} // namespace lldb_private
+
+#endif // LLDB_SOURCE_PLUGINS_PROCESS_UTILITY_LINUXPROCSTATUS_H