Remote Non-Stop Support
Summary:
This patch is the beginnings of support for Non-stop mode in the remote protocol. Letting a user examine stopped threads, while other threads execute freely.
Non-stop mode is enabled using the setting target.non-stop-mode, which sends a QNonStop packet when establishing the remote connection.
Changes are also made to treat the '?' stop reply packet differently in non-stop mode, according to spec https://sourceware.org/gdb/current/onlinedocs/gdb/Remote-Non_002dStop.html#Remote-Non_002dStop.
A setting for querying the remote for default thread on setup is also included.
Handling of '%' async notification packets will be added next.
Reviewers: clayborg
Subscribers: lldb-commits, ADodds, ted, deepak2427
Differential Revision: http://reviews.llvm.org/D9656
llvm-svn: 237239
diff --git a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp
index 07c51dc..ca74e55 100644
--- a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp
+++ b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp
@@ -1621,6 +1621,22 @@
}
bool
+GDBRemoteCommunicationClient::GetDefaultThreadId (lldb::tid_t &tid)
+{
+ StringExtractorGDBRemote response;
+ if (SendPacketAndWaitForResponse("qC",response,false) != PacketResult::Success)
+ return false;
+
+ if (!response.IsNormalResponse())
+ return false;
+
+ if (response.GetChar() == 'Q' && response.GetChar() == 'C')
+ tid = response.GetHexMaxU32(true, -1);
+
+ return true;
+}
+
+bool
GDBRemoteCommunicationClient::GetHostInfo (bool force)
{
Log *log (ProcessGDBRemoteLog::GetLogIfAnyCategoryIsSet (GDBR_LOG_PROCESS));
@@ -2759,6 +2775,25 @@
return false;
}
+bool
+GDBRemoteCommunicationClient::SetNonStopMode (const bool enable)
+{
+ // Form non-stop packet request
+ char packet[32];
+ const int packet_len = ::snprintf(packet, sizeof(packet), "QNonStop:%1d", (int)enable);
+ assert(packet_len < (int)sizeof(packet));
+
+ StringExtractorGDBRemote response;
+ // Send to target
+ if (SendPacketAndWaitForResponse(packet, packet_len, response, false) == PacketResult::Success)
+ if (response.IsOKResponse())
+ return true;
+
+ // Failed or not supported
+ return false;
+
+}
+
void
GDBRemoteCommunicationClient::TestPacketSpeed (const uint32_t num_packets)
{