[LLDB] Add support for the structured data plugins in lldb-server (#159457)

The LLDB client has support for structured data plugins, but lldb-server
doesn't have corresponding support for it. This patch adds the missing
functionality in LLGS for servers to register their supported plugins
and send corresponding async messages.

1 files changed, 31 insertions, 0 deletions

diff --git a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerLLGS.cpp b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerLLGS.cpp
index e3202d6..2f62415 100644
--- a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerLLGS.cpp
+++ b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerLLGS.cpp
@@ -147,6 +147,9 @@ void GDBRemoteCommunicationServerLLGS::RegisterPacketHandlers() {
       StringExtractorGDBRemote::eServerPacketType_QSetWorkingDir,
       &GDBRemoteCommunicationServerLLGS::Handle_QSetWorkingDir);
   RegisterMemberFunctionHandler(
+      StringExtractorGDBRemote::eServerPacketType_qStructuredDataPlugins,
+      &GDBRemoteCommunicationServerLLGS::Handle_qStructuredDataPlugins);
+  RegisterMemberFunctionHandler(
       StringExtractorGDBRemote::eServerPacketType_qsThreadInfo,
       &GDBRemoteCommunicationServerLLGS::Handle_qsThreadInfo);
   RegisterMemberFunctionHandler(
@@ -1246,6 +1249,19 @@ Status GDBRemoteCommunicationServerLLGS::InitializeConnection(
 }
 
 GDBRemoteCommunication::PacketResult
+GDBRemoteCommunicationServerLLGS::SendStructuredDataPacket(
+    const llvm::json::Value &value) {
+  std::string json_string;
+  raw_string_ostream os(json_string);
+  os << value;
+
+  StreamGDBRemote escaped_response;
+  escaped_response.PutCString("JSON-async:");
+  escaped_response.PutEscapedBytes(json_string.c_str(), json_string.size());
+  return SendPacketNoLock(escaped_response.GetString());
+}
+
+GDBRemoteCommunication::PacketResult
 GDBRemoteCommunicationServerLLGS::SendONotification(const char *buffer,
                                                     uint32_t len) {
   if ((buffer == nullptr) || (len == 0)) {
@@ -1437,6 +1453,21 @@ GDBRemoteCommunicationServerLLGS::Handle_jLLDBTraceGetBinaryData(
 }
 
 GDBRemoteCommunication::PacketResult
+GDBRemoteCommunicationServerLLGS::Handle_qStructuredDataPlugins(
+    StringExtractorGDBRemote &packet) {
+  // Fail if we don't have a current process.
+  if (!m_current_process ||
+      (m_current_process->GetID() == LLDB_INVALID_PROCESS_ID))
+    return SendErrorResponse(68);
+
+  std::vector<std::string> structured_data_plugins =
+      m_current_process->GetStructuredDataPlugins();
+
+  return SendJSONResponse(
+      llvm::json::Value(llvm::json::Array(structured_data_plugins)));
+}
+
+GDBRemoteCommunication::PacketResult
 GDBRemoteCommunicationServerLLGS::Handle_qProcessInfo(
     StringExtractorGDBRemote &packet) {
   // Fail if we don't have a current process.