Rename Error -> Status.

This renames the LLDB error class to Status, as discussed
on the lldb-dev mailing list.

A change of this magnitude cannot easily be done without
find and replace, but that has potential to catch unwanted
occurrences of common strings such as "Error".  Every effort
was made to find all the obvious things such as the word "Error"
appearing in a string, etc, but it's possible there are still
some lingering occurences left around.  Hopefully nothing too
serious.

llvm-svn: 302872
diff --git a/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp b/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
index c4ae5e3..37a4153 100644
--- a/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
+++ b/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
@@ -97,8 +97,8 @@
 // function and get the packet history dumped to a file.
 void DumpProcessGDBRemotePacketHistory(void *p, const char *path) {
   StreamFile strm;
-  Error error(strm.GetFile().Open(path, File::eOpenOptionWrite |
-                                            File::eOpenOptionCanCreate));
+  Status error(strm.GetFile().Open(path, File::eOpenOptionWrite |
+                                             File::eOpenOptionCanCreate));
   if (error.Success())
     ((ProcessGDBRemote *)p)->GetGDBRemote().DumpHistory(strm);
 }
@@ -324,7 +324,7 @@
     const FileSpec &target_definition_fspec) {
   ScriptInterpreter *interpreter =
       GetTarget().GetDebugger().GetCommandInterpreter().GetScriptInterpreter();
-  Error error;
+  Status error;
   StructuredData::ObjectSP module_object_sp(
       interpreter->LoadPluginModule(target_definition_fspec, error));
   if (module_object_sp) {
@@ -639,23 +639,23 @@
   m_register_info.Finalize(GetTarget().GetArchitecture());
 }
 
-Error ProcessGDBRemote::WillLaunch(Module *module) {
+Status ProcessGDBRemote::WillLaunch(Module *module) {
   return WillLaunchOrAttach();
 }
 
-Error ProcessGDBRemote::WillAttachToProcessWithID(lldb::pid_t pid) {
+Status ProcessGDBRemote::WillAttachToProcessWithID(lldb::pid_t pid) {
   return WillLaunchOrAttach();
 }
 
-Error ProcessGDBRemote::WillAttachToProcessWithName(const char *process_name,
-                                                    bool wait_for_launch) {
+Status ProcessGDBRemote::WillAttachToProcessWithName(const char *process_name,
+                                                     bool wait_for_launch) {
   return WillLaunchOrAttach();
 }
 
-Error ProcessGDBRemote::DoConnectRemote(Stream *strm,
-                                        llvm::StringRef remote_url) {
+Status ProcessGDBRemote::DoConnectRemote(Stream *strm,
+                                         llvm::StringRef remote_url) {
   Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS));
-  Error error(WillLaunchOrAttach());
+  Status error(WillLaunchOrAttach());
 
   if (error.Fail())
     return error;
@@ -744,8 +744,8 @@
   return error;
 }
 
-Error ProcessGDBRemote::WillLaunchOrAttach() {
-  Error error;
+Status ProcessGDBRemote::WillLaunchOrAttach() {
+  Status error;
   m_stdio_communication.Clear();
   return error;
 }
@@ -753,10 +753,10 @@
 //----------------------------------------------------------------------
 // Process Control
 //----------------------------------------------------------------------
-Error ProcessGDBRemote::DoLaunch(Module *exe_module,
-                                 ProcessLaunchInfo &launch_info) {
+Status ProcessGDBRemote::DoLaunch(Module *exe_module,
+                                  ProcessLaunchInfo &launch_info) {
   Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS));
-  Error error;
+  Status error;
 
   if (log)
     log->Printf("ProcessGDBRemote::%s() entered", __FUNCTION__);
@@ -965,8 +965,8 @@
   return error;
 }
 
-Error ProcessGDBRemote::ConnectToDebugserver(llvm::StringRef connect_url) {
-  Error error;
+Status ProcessGDBRemote::ConnectToDebugserver(llvm::StringRef connect_url) {
+  Status error;
   // Only connect if we have a valid connect URL
   Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS));
 
@@ -1169,10 +1169,10 @@
   DidLaunchOrAttach(process_arch);
 }
 
-Error ProcessGDBRemote::DoAttachToProcessWithID(
+Status ProcessGDBRemote::DoAttachToProcessWithID(
     lldb::pid_t attach_pid, const ProcessAttachInfo &attach_info) {
   Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS));
-  Error error;
+  Status error;
 
   if (log)
     log->Printf("ProcessGDBRemote::%s()", __FUNCTION__);
@@ -1197,9 +1197,9 @@
   return error;
 }
 
-Error ProcessGDBRemote::DoAttachToProcessWithName(
+Status ProcessGDBRemote::DoAttachToProcessWithName(
     const char *process_name, const ProcessAttachInfo &attach_info) {
-  Error error;
+  Status error;
   // Clear out and clean up from any current state
   Clear();
 
@@ -1247,18 +1247,18 @@
   DidLaunchOrAttach(process_arch);
 }
 
-Error ProcessGDBRemote::WillResume() {
+Status ProcessGDBRemote::WillResume() {
   m_continue_c_tids.clear();
   m_continue_C_tids.clear();
   m_continue_s_tids.clear();
   m_continue_S_tids.clear();
   m_jstopinfo_sp.reset();
   m_jthreadsinfo_sp.reset();
-  return Error();
+  return Status();
 }
 
-Error ProcessGDBRemote::DoResume() {
-  Error error;
+Status ProcessGDBRemote::DoResume() {
+  Status error;
   Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS));
   if (log)
     log->Printf("ProcessGDBRemote::Resume()");
@@ -2400,8 +2400,8 @@
   m_thread_list_real.RefreshStateAfterStop();
 }
 
-Error ProcessGDBRemote::DoHalt(bool &caused_stop) {
-  Error error;
+Status ProcessGDBRemote::DoHalt(bool &caused_stop) {
+  Status error;
 
   if (m_public_state.GetValue() == eStateAttaching) {
     // We are being asked to halt during an attach. We need to just close
@@ -2412,8 +2412,8 @@
   return error;
 }
 
-Error ProcessGDBRemote::DoDetach(bool keep_stopped) {
-  Error error;
+Status ProcessGDBRemote::DoDetach(bool keep_stopped) {
+  Status error;
   Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS));
   if (log)
     log->Printf("ProcessGDBRemote::DoDetach(keep_stopped: %i)", keep_stopped);
@@ -2441,8 +2441,8 @@
   return error;
 }
 
-Error ProcessGDBRemote::DoDestroy() {
-  Error error;
+Status ProcessGDBRemote::DoDestroy() {
+  Status error;
   Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS));
   if (log)
     log->Printf("ProcessGDBRemote::DoDestroy()");
@@ -2722,7 +2722,7 @@
 // Process Memory
 //------------------------------------------------------------------
 size_t ProcessGDBRemote::DoReadMemory(addr_t addr, void *buf, size_t size,
-                                      Error &error) {
+                                      Status &error) {
   GetMaxMemorySize();
   bool binary_memory_read = m_gdb_comm.GetxPacketSupported();
   // M and m packets take 2 bytes for 1 byte of memory
@@ -2781,7 +2781,7 @@
 }
 
 size_t ProcessGDBRemote::DoWriteMemory(addr_t addr, const void *buf,
-                                       size_t size, Error &error) {
+                                       size_t size, Status &error) {
   GetMaxMemorySize();
   // M and m packets take 2 bytes for 1 byte of memory
   size_t max_memory_size = m_max_memory_size / 2;
@@ -2822,7 +2822,7 @@
 
 lldb::addr_t ProcessGDBRemote::DoAllocateMemory(size_t size,
                                                 uint32_t permissions,
-                                                Error &error) {
+                                                Status &error) {
   Log *log(
       GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS | LIBLLDB_LOG_EXPRESSIONS));
   addr_t allocated_addr = LLDB_INVALID_ADDRESS;
@@ -2866,27 +2866,27 @@
   return allocated_addr;
 }
 
-Error ProcessGDBRemote::GetMemoryRegionInfo(addr_t load_addr,
-                                            MemoryRegionInfo &region_info) {
+Status ProcessGDBRemote::GetMemoryRegionInfo(addr_t load_addr,
+                                             MemoryRegionInfo &region_info) {
 
-  Error error(m_gdb_comm.GetMemoryRegionInfo(load_addr, region_info));
+  Status error(m_gdb_comm.GetMemoryRegionInfo(load_addr, region_info));
   return error;
 }
 
-Error ProcessGDBRemote::GetWatchpointSupportInfo(uint32_t &num) {
+Status ProcessGDBRemote::GetWatchpointSupportInfo(uint32_t &num) {
 
-  Error error(m_gdb_comm.GetWatchpointSupportInfo(num));
+  Status error(m_gdb_comm.GetWatchpointSupportInfo(num));
   return error;
 }
 
-Error ProcessGDBRemote::GetWatchpointSupportInfo(uint32_t &num, bool &after) {
-  Error error(m_gdb_comm.GetWatchpointSupportInfo(
+Status ProcessGDBRemote::GetWatchpointSupportInfo(uint32_t &num, bool &after) {
+  Status error(m_gdb_comm.GetWatchpointSupportInfo(
       num, after, GetTarget().GetArchitecture()));
   return error;
 }
 
-Error ProcessGDBRemote::DoDeallocateMemory(lldb::addr_t addr) {
-  Error error;
+Status ProcessGDBRemote::DoDeallocateMemory(lldb::addr_t addr) {
+  Status error;
   LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory();
 
   switch (supported) {
@@ -2924,7 +2924,7 @@
 // Process STDIO
 //------------------------------------------------------------------
 size_t ProcessGDBRemote::PutSTDIN(const char *src, size_t src_len,
-                                  Error &error) {
+                                  Status &error) {
   if (m_stdio_communication.IsConnected()) {
     ConnectionStatus status;
     m_stdio_communication.Write(src, src_len, status, NULL);
@@ -2934,8 +2934,8 @@
   return 0;
 }
 
-Error ProcessGDBRemote::EnableBreakpointSite(BreakpointSite *bp_site) {
-  Error error;
+Status ProcessGDBRemote::EnableBreakpointSite(BreakpointSite *bp_site) {
+  Status error;
   assert(bp_site != NULL);
 
   // Get logging info
@@ -3072,8 +3072,8 @@
   return EnableSoftwareBreakpoint(bp_site);
 }
 
-Error ProcessGDBRemote::DisableBreakpointSite(BreakpointSite *bp_site) {
-  Error error;
+Status ProcessGDBRemote::DisableBreakpointSite(BreakpointSite *bp_site) {
+  Status error;
   assert(bp_site != NULL);
   addr_t addr = bp_site->GetLoadAddress();
   user_id_t site_id = bp_site->GetID();
@@ -3141,8 +3141,8 @@
     return eWatchpointWrite;
 }
 
-Error ProcessGDBRemote::EnableWatchpoint(Watchpoint *wp, bool notify) {
-  Error error;
+Status ProcessGDBRemote::EnableWatchpoint(Watchpoint *wp, bool notify) {
+  Status error;
   if (wp) {
     user_id_t watchID = wp->GetID();
     addr_t addr = wp->GetLoadAddress();
@@ -3178,8 +3178,8 @@
   return error;
 }
 
-Error ProcessGDBRemote::DisableWatchpoint(Watchpoint *wp, bool notify) {
-  Error error;
+Status ProcessGDBRemote::DisableWatchpoint(Watchpoint *wp, bool notify) {
+  Status error;
   if (wp) {
     user_id_t watchID = wp->GetID();
 
@@ -3231,8 +3231,8 @@
   m_thread_list.Clear();
 }
 
-Error ProcessGDBRemote::DoSignal(int signo) {
-  Error error;
+Status ProcessGDBRemote::DoSignal(int signo) {
+  Status error;
   Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS));
   if (log)
     log->Printf("ProcessGDBRemote::DoSignal (signal = %d)", signo);
@@ -3242,15 +3242,15 @@
   return error;
 }
 
-Error ProcessGDBRemote::EstablishConnectionIfNeeded(
-    const ProcessInfo &process_info) {
+Status
+ProcessGDBRemote::EstablishConnectionIfNeeded(const ProcessInfo &process_info) {
   // Make sure we aren't already connected?
   if (m_gdb_comm.IsConnected())
-    return Error();
+    return Status();
 
   PlatformSP platform_sp(GetTarget().GetPlatform());
   if (platform_sp && !platform_sp->IsHost())
-    return Error("Lost debug server connection");
+    return Status("Lost debug server connection");
 
   auto error = LaunchAndConnectToDebugserver(process_info);
   if (error.Fail()) {
@@ -3277,11 +3277,11 @@
 }
 #endif
 
-Error ProcessGDBRemote::LaunchAndConnectToDebugserver(
+Status ProcessGDBRemote::LaunchAndConnectToDebugserver(
     const ProcessInfo &process_info) {
   using namespace std::placeholders; // For _1, _2, etc.
 
-  Error error;
+  Status error;
   if (m_debugserver_pid == LLDB_INVALID_PROCESS_ID) {
     // If we locate debugserver, keep that located version around
     static FileSpec g_debugserver_file_spec;
@@ -3739,30 +3739,30 @@
   return false;
 }
 
-Error ProcessGDBRemote::UpdateAutomaticSignalFiltering() {
+Status ProcessGDBRemote::UpdateAutomaticSignalFiltering() {
   Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS));
   LLDB_LOG(log, "Check if need to update ignored signals");
 
   // QPassSignals package is not supported by the server,
   // there is no way we can ignore any signals on server side.
   if (!m_gdb_comm.GetQPassSignalsSupported())
-    return Error();
+    return Status();
 
   // No signals, nothing to send.
   if (m_unix_signals_sp == nullptr)
-    return Error();
+    return Status();
 
   // Signals' version hasn't changed, no need to send anything.
   uint64_t new_signals_version = m_unix_signals_sp->GetVersion();
   if (new_signals_version == m_last_signals_version) {
     LLDB_LOG(log, "Signals' version hasn't changed. version={0}",
              m_last_signals_version);
-    return Error();
+    return Status();
   }
 
   auto signals_to_ignore =
       m_unix_signals_sp->GetFilteredSignals(false, false, false);
-  Error error = m_gdb_comm.SendSignalsToIgnore(signals_to_ignore);
+  Status error = m_gdb_comm.SendSignalsToIgnore(signals_to_ignore);
 
   LLDB_LOG(log,
            "Signals' version changed. old version={0}, new version={1}, "
@@ -3820,11 +3820,11 @@
   return m_dyld_ap.get();
 }
 
-Error ProcessGDBRemote::SendEventData(const char *data) {
+Status ProcessGDBRemote::SendEventData(const char *data) {
   int return_value;
   bool was_supported;
 
-  Error error;
+  Status error;
 
   return_value = m_gdb_comm.SendLaunchEventDataPacket(data, &was_supported);
   if (return_value != 0) {
@@ -3995,7 +3995,7 @@
   return object_sp;
 }
 
-Error ProcessGDBRemote::ConfigureStructuredData(
+Status ProcessGDBRemote::ConfigureStructuredData(
     const ConstString &type_name, const StructuredData::ObjectSP &config_sp) {
   return m_gdb_comm.ConfigureRemoteStructuredData(type_name, config_sp);
 }
@@ -4332,7 +4332,7 @@
 
   // request the target xml file
   std::string raw;
-  lldb_private::Error lldberr;
+  lldb_private::Status lldberr;
   if (!comm.ReadExtFeature(ConstString("features"), ConstString("target.xml"),
                            raw, lldberr)) {
     return false;
@@ -4424,10 +4424,10 @@
   return m_register_info.GetNumRegisters() > 0;
 }
 
-Error ProcessGDBRemote::GetLoadedModuleList(LoadedModuleInfoList &list) {
+Status ProcessGDBRemote::GetLoadedModuleList(LoadedModuleInfoList &list) {
   // Make sure LLDB has an XML parser it can use first
   if (!XMLDocument::XMLEnabled())
-    return Error(0, ErrorType::eErrorTypeGeneric);
+    return Status(0, ErrorType::eErrorTypeGeneric);
 
   Log *log = GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS);
   if (log)
@@ -4441,11 +4441,11 @@
 
     // request the loaded library list
     std::string raw;
-    lldb_private::Error lldberr;
+    lldb_private::Status lldberr;
 
     if (!comm.ReadExtFeature(ConstString("libraries-svr4"), ConstString(""),
                              raw, lldberr))
-      return Error(0, ErrorType::eErrorTypeGeneric);
+      return Status(0, ErrorType::eErrorTypeGeneric);
 
     // parse the xml file in memory
     if (log)
@@ -4453,11 +4453,11 @@
     XMLDocument doc;
 
     if (!doc.ParseMemory(raw.c_str(), raw.size(), "noname.xml"))
-      return Error(0, ErrorType::eErrorTypeGeneric);
+      return Status(0, ErrorType::eErrorTypeGeneric);
 
     XMLNode root_element = doc.GetRootElement("library-list-svr4");
     if (!root_element)
-      return Error();
+      return Status();
 
     // main link map structure
     llvm::StringRef main_lm = root_element.GetAttributeValue("main-lm");
@@ -4528,22 +4528,22 @@
 
     // request the loaded library list
     std::string raw;
-    lldb_private::Error lldberr;
+    lldb_private::Status lldberr;
 
     if (!comm.ReadExtFeature(ConstString("libraries"), ConstString(""), raw,
                              lldberr))
-      return Error(0, ErrorType::eErrorTypeGeneric);
+      return Status(0, ErrorType::eErrorTypeGeneric);
 
     if (log)
       log->Printf("parsing: %s", raw.c_str());
     XMLDocument doc;
 
     if (!doc.ParseMemory(raw.c_str(), raw.size(), "noname.xml"))
-      return Error(0, ErrorType::eErrorTypeGeneric);
+      return Status(0, ErrorType::eErrorTypeGeneric);
 
     XMLNode root_element = doc.GetRootElement("library-list");
     if (!root_element)
-      return Error();
+      return Status();
 
     root_element.ForEachChildElementWithName(
         "library", [log, &list](const XMLNode &library) -> bool {
@@ -4584,10 +4584,10 @@
       log->Printf("found %" PRId32 " modules in total",
                   (int)list.m_list.size());
   } else {
-    return Error(0, ErrorType::eErrorTypeGeneric);
+    return Status(0, ErrorType::eErrorTypeGeneric);
   }
 
-  return Error();
+  return Status();
 }
 
 lldb::ModuleSP ProcessGDBRemote::LoadModuleAtAddress(const FileSpec &file,
@@ -4686,15 +4686,15 @@
   return LoadModules(module_list);
 }
 
-Error ProcessGDBRemote::GetFileLoadAddress(const FileSpec &file,
-                                           bool &is_loaded,
-                                           lldb::addr_t &load_addr) {
+Status ProcessGDBRemote::GetFileLoadAddress(const FileSpec &file,
+                                            bool &is_loaded,
+                                            lldb::addr_t &load_addr) {
   is_loaded = false;
   load_addr = LLDB_INVALID_ADDRESS;
 
   std::string file_path = file.GetPath(false);
   if (file_path.empty())
-    return Error("Empty file name specified");
+    return Status("Empty file name specified");
 
   StreamString packet;
   packet.PutCString("qFileLoadAddress:");
@@ -4704,27 +4704,28 @@
   if (m_gdb_comm.SendPacketAndWaitForResponse(packet.GetString(), response,
                                               false) !=
       GDBRemoteCommunication::PacketResult::Success)
-    return Error("Sending qFileLoadAddress packet failed");
+    return Status("Sending qFileLoadAddress packet failed");
 
   if (response.IsErrorResponse()) {
     if (response.GetError() == 1) {
       // The file is not loaded into the inferior
       is_loaded = false;
       load_addr = LLDB_INVALID_ADDRESS;
-      return Error();
+      return Status();
     }
 
-    return Error(
+    return Status(
         "Fetching file load address from remote server returned an error");
   }
 
   if (response.IsNormalResponse()) {
     is_loaded = true;
     load_addr = response.GetHexMaxU64(false, LLDB_INVALID_ADDRESS);
-    return Error();
+    return Status();
   }
 
-  return Error("Unknown error happened during sending the load address packet");
+  return Status(
+      "Unknown error happened during sending the load address packet");
 }
 
 void ProcessGDBRemote::ModulesDidLoad(ModuleList &module_list) {