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Workaround QEMU GDB server issue. 

During testing I observed QEMU send "$T02thread:01;#04" upon connection,
before any command from LLDB.  This change from gclayton accepts (and
discards) a packet immediately after sending the initial ack, to flush
the GDB remote pipeline.

llvm-svn: 197579
This commit is contained in:
Ed Maste 2013-12-18 15:31:45 +00:00
parent f22856a415
commit 48f986faee
1 changed files with 8 additions and 0 deletions
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8
lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp
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@ -118,6 +118,14 @@ GDBRemoteCommunicationClient::HandshakeWithServer (Error *error_ptr)
// fail to send the handshake ack, there is no reason to continue...
if (SendAck())
{
// Wait for any responses that might have been queued up in the remote
// GDB server and flush them all
StringExtractorGDBRemote response;
PacketResult packet_result = PacketResult::Success;
const uint32_t timeout_usec = 10 * 1000; // Wait for 10 ms for a response
while (packet_result == PacketResult::Success)
packet_result = WaitForPacketWithTimeoutMicroSecondsNoLock (response, timeout_usec);
// The return value from QueryNoAckModeSupported() is true if the packet
// was sent and _any_ response (including UNIMPLEMENTED) was received),
// or false if no response was received. This quickly tells us if we have