Thanks for the reply. I enabled the packet logging in LLDB.
(lldb) log enable gdb-remote packets (lldb) process connect --plugin gdb-remote connect://localhost:51000 < 1> send packet: + history[1] tid=0xb1d819d0 < 1> send packet: + < 26> send packet: $QThreadSuffixSupported#e4 < 1> read packet: + < 4> read packet: $#00 < 1> send packet: + < 27> send packet: $QListThreadsInStopReply#21 < 1> read packet: + < 7> read packet: $E01#a6 < 1> send packet: + < 10> send packet: $vCont?#49 < 1> read packet: + < 15> read packet: $vCont[;c;s]#0e < 1> send packet: + < 27> send packet: $qVAttachOrWaitSupported#38 < 1> read packet: + < 6> send packet: $qC#b4 < 1> read packet: + < 7> read packet: $QC0#c4 < 1> send packet: + (lldb) run After this lldb just hangs. lldb doesn't send any packet after the 'run' command. I debugged by inserting a breakpoint in lldb's code which sends the 'A' packet. And that breakpoint was not hit. On Wed, Aug 21, 2013 at 10:31 PM, Greg Clayton <[email protected]> wrote: > The "process launch" command should send the 'A' packet, and it is waiting > for a stop reply response from the 'A' packet. Try enabling the packet > logging in LLDB: > > (lldb) log enable gdb-remote packets > (lldb) process connect ... > (lldb) run > > My guess is that the 'A' packet isn't responding with a stop reply packet. > > On Aug 21, 2013, at 7:47 AM, chansarav <[email protected]> wrote: > > > Hi, > > > > I am connecting lldb with my simulator through 'gdb-remote' process > plugin. After extablishing the connection, I want to issue the 'process > launch' command in lldb which should send the arguments packet 'A' to > simulator asking it to launch the program. > > > > I am facing the problem while issuing the 'process launch' command in > lldb. When I give the 'process launch' command, lldb hangs and there is no > communication with simulator. When I debugged with gdb, I got the backtrace > as follows: > > > > #2 0xb6703a6f in lldb_private::Condition::Wait (this=0x8077dac, > mutex=..., abstime=0x0, timed_out=0xbfffaa9f) at > /home/chandra/llvm-3.1/tools/lldb/source/Host/common/Condition.cpp:92 > > #3 0xb662768d in lldb_private::Predicate<bool>::WaitForValueEqualTo > (this=0x8077d90, value=true, abstime=0x0, timed_out=0xbfffaa9f) at > /home/chandra/llvm-3.1/tools/lldb/source/Core/../../include/lldb/Host/Predicate.h:317 > > #4 0xb662b03f in lldb_private::Listener::WaitForEventsInternal > (this=0x8077d3c, timeout=0x0, broadcaster=0xadb0179c, > broadcaster_names=0x0, num_broadcaster_names=0, event_type_mask=3, > event_sp=...) at > /home/chandra/llvm-3.1/tools/lldb/source/Core/Listener.cpp:409 > > #5 0xb662b1f7 in > lldb_private::Listener::WaitForEventForBroadcasterWithType (this=0x8077d3c, > timeout=0x0, broadcaster=0xadb0179c, event_type_mask=3, event_sp=...) at > /home/chandra/llvm-3.1/tools/lldb/source/Core/Listener.cpp:440 > > #6 0xb69421ec in lldb_private::Process::WaitForStateChangedEvents > (this=0xadb01788, timeout=0x0, event_sp=...) at > /home/chandra/llvm-3.1/tools/lldb/source/Target/Process.cpp:1069 > > #7 0xb6941f2c in lldb_private::Process::WaitForProcessToStop > (this=0xadb01788, timeout=0x0) at > /home/chandra/llvm-3.1/tools/lldb/source/Target/Process.cpp:977 > > #8 0xb6587d98 in CommandObjectProcessLaunch::DoExecute (this=0x80813d0, > launch_args=..., result=...) at > /home/chandra/llvm-3.1/tools/lldb/source/Commands/CommandObjectProcess.cpp:220 > > #9 0xb672c999 in lldb_private::CommandObjectParsed::Execute > (this=0x80813d0, args_string=0xb4d667bc "", result=...) at > /home/chandra/llvm-3.1/tools/lldb/source/Interpreter/CommandObject.cpp:856 > > #10 0xb67215d3 in lldb_private::CommandInterpreter::HandleCommand > (this=0x8077fc8, command_line=0x883a614 "process launch", > lazy_add_to_history=lldb_private::eLazyBoolYes, result=..., > > override_context=0x0, repeat_on_empty_command=true, > no_context_switching=false) at > /home/chandra/llvm-3.1/tools/lldb/source/Interpreter/CommandInterpreter.cpp:1571 > > #11 0xb64e0ced in lldb::SBCommandInterpreter::HandleCommand > (this=0xbfffc2cc, command_line=0x883a614 "process launch", result=..., > add_to_history=true) at > /home/chandra/llvm-3.1/tools/lldb/source/API/SBCommandInterpreter.cpp:97 > > #12 0x0805a103 in Driver::HandleIOEvent (this=0xbfffec7c, event=...) at > /home/chandra/llvm-3.1/tools/lldb/tools/driver/Driver.cpp:996 > > #13 0x0805b516 in Driver::MainLoop (this=0xbfffec7c) at > /home/chandra/llvm-3.1/tools/lldb/tools/driver/Driver.cpp:1430 > > #14 0x0805bbf2 in main (argc=4, argv=0xbfffede4, envp=0xbfffedf8) at > /home/chandra/llvm-3.1/tools/lldb/tools/driver/Driver.cpp:1562 > > > > Though I am analyzing on this, Can someone help me in finding out what > goes wrong while trying to launch a program in simulator through > 'gdb-remote' process plugin? > > > > > > Following is the communication between lldb and simulator for the > "process connect --plugin gdb-remote connect://localhost:51000" command. > > > > Send Packet: QStartNoAckMode: 15 chars > > Read Packet: > > Send Packet: QThreadSuffixSupported: 22 chars > > Read Packet: > > Send Packet: QListThreadsInStopReply: 23 chars > > Read Packet: E01 > > Send Packet: qHostInfo: 9 chars > > Read Packet: > cputype:201;cpusubtype:-2;ostype:unknown;vendor:unknown;endian:little;ptrsize:4; > > Send Packet: vCont?: 6 chars > > Read Packet: vCont[;c;s] > > Send Packet: qVAttachOrWaitSupported: 23 chars > > Read Packet: > > Send Packet: qC: 2 chars > > Read Packet: QC0 > > > > LLDB sets the status as connected after this communication. > > (snip start) > > if (pid == LLDB_INVALID_PROCESS_ID) > > { > > // We don't have a valid process ID, so note that we are > connected > > // and could now request to launch or attach, or get remote > process > > // listings... > > SetPrivateState (eStateConnected); > > } > > (snip end) > > function: ProcessGDBRemote::DoConnectRemote () > > > > Thanks, > > Chandra Kumar R. > > _______________________________________________ > > lldb-dev mailing list > > [email protected] > > http://lists.cs.uiuc.edu/mailman/listinfo/lldb-dev > >
_______________________________________________ lldb-dev mailing list [email protected] http://lists.cs.uiuc.edu/mailman/listinfo/lldb-dev
