[Lldb-commits] [lldb] [lldb][AIX] get host info for AIX (PR #134354)

[Pavel Labath via lldb-commits]

================
@@ -6,18 +6,172 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include <fcntl.h>
+#include <sstream>
+#include <sys/procfs.h>
+
 #include "lldb/Host/Host.h"
+#include "lldb/Host/linux/Support.h"
+#include "lldb/Utility/LLDBLog.h"
+#include "lldb/Utility/Log.h"
+#include "lldb/Utility/ProcessInfo.h"
 #include "lldb/Utility/Status.h"
+#include "llvm/BinaryFormat/XCOFF.h"
 
+using namespace llvm;
+using namespace lldb;
 using namespace lldb_private;
 
+namespace {
+enum class ProcessState {
+  Unknown,
+  Dead,
+  DiskSleep,
+  Idle,
+  Paging,
+  Parked,
+  Running,
+  Sleeping,
+  TracedOrStopped,
+  Zombie,
+};
+}
+
+static bool GetStatusInfo(::pid_t Pid, ProcessInstanceInfo &ProcessInfo,
+                          ProcessState &State, ::pid_t &TracerPid,
+                          ::pid_t &Tgid) {
+  Log *log = GetLog(LLDBLog::Host);
+
+  auto BufferOrError = getProcFile(Pid, "status");
+  if (!BufferOrError)
+    return false;
+
+  llvm::StringRef Rest = BufferOrError.get()->getBuffer();
+  while (!Rest.empty()) {
+    llvm::StringRef Line;
+    std::tie(Line, Rest) = Rest.split('\n');
+
+    if (Line.consume_front("Gid:")) {
+      // Real, effective, saved set, and file system GIDs. Read the first two.
+      Line = Line.ltrim();
+      uint32_t RGid, EGid;
+      Line.consumeInteger(10, RGid);
+      Line = Line.ltrim();
+      Line.consumeInteger(10, EGid);
+
+      ProcessInfo.SetGroupID(RGid);
+      ProcessInfo.SetEffectiveGroupID(EGid);
+    } else if (Line.consume_front("Uid:")) {
+      // Real, effective, saved set, and file system UIDs. Read the first two.
+      Line = Line.ltrim();
+      uint32_t RUid, EUid;
+      Line.consumeInteger(10, RUid);
+      Line = Line.ltrim();
+      Line.consumeInteger(10, EUid);
+
+      ProcessInfo.SetUserID(RUid);
+      ProcessInfo.SetEffectiveUserID(EUid);
+    } else if (Line.consume_front("PPid:")) {
+      ::pid_t PPid;
+      Line.ltrim().consumeInteger(10, PPid);
+      ProcessInfo.SetParentProcessID(PPid);
+    } else if (Line.consume_front("State:")) {
+      State = llvm::StringSwitch<ProcessState>(Line.ltrim().take_front(1))
+                  .Case("D", ProcessState::DiskSleep)
+                  .Case("I", ProcessState::Idle)
+                  .Case("R", ProcessState::Running)
+                  .Case("S", ProcessState::Sleeping)
+                  .CaseLower("T", ProcessState::TracedOrStopped)
+                  .Case("W", ProcessState::Paging)
+                  .Case("P", ProcessState::Parked)
+                  .Case("X", ProcessState::Dead)
+                  .Case("Z", ProcessState::Zombie)
+                  .Default(ProcessState::Unknown);
+      if (State == ProcessState::Unknown) {
+        LLDB_LOG(log, "Unknown process state {0}", Line);
+      }
+    } else if (Line.consume_front("TracerPid:")) {
+      Line = Line.ltrim();
+      Line.consumeInteger(10, TracerPid);
+    } else if (Line.consume_front("Tgid:")) {
+      Line = Line.ltrim();
+      Line.consumeInteger(10, Tgid);
+    }
+  }
+  return true;
+}
+
+static void GetExePathAndArch(::pid_t pid, ProcessInstanceInfo &process_info) {
+  Log *log = GetLog(LLDBLog::Process);
+  std::string ExePath(PATH_MAX, '\0');
+  struct psinfo psinfoData;
+
+  // We can't use getProcFile here because proc/[pid]/exe is a symbolic link.
+  llvm::SmallString<64> ProcExe;
+  (llvm::Twine("/proc/") + llvm::Twine(pid) + "/cwd").toVector(ProcExe);
----------------
labath wrote:

cwd??

https://github.com/llvm/llvm-project/pull/134354