User forums > Using Code::Blocks
Problem with debugger
kramed:
Hi,
I just upgraded to SVN using wxGTK 2.6.3 patch2. I have compiled it in Linux. I have typically used C::B in Windows. The problem I seem to be having is during debugging. I am able to set break points but when I start the debugger my program does not start in a terminal. The debugger is active and I can step through the program if break points are set before any user input is required but as soon as it hits a cin >> I have to force the debugger to close. What am I overlooking during my transition from Windows to Linux.
PS, yes I have debugging symbols included and am compiling in Debug mode.
Thanks, Mark.
Pecan:
Here's a patch to add a Linux debugging console.
--- Code: ---Index: debuggergdb.cpp
===================================================================
--- debuggergdb.cpp (revision 3659)
+++ debuggergdb.cpp (working copy)
@@ -233,6 +233,10 @@
{
NotifyMissingFile(_T("debugger.zip"));
}
+ // vars for Linux console //(pecan 2007/2/06)
+ m_bIsConsole = false;
+ m_nConsolePid = 0;
+ m_ConsoleTty = wxEmptyString;
}
DebuggerGDB::~DebuggerGDB()
@@ -1021,6 +1025,21 @@
m_State.GetDriver()->Prepare(target && target->GetTargetType() == ttConsoleOnly);
m_State.ApplyBreakpoints();
+ #ifdef __WXGTK__ //(pecan 2007/2/05)
+ // create xterm and issue tty "/dev/pts/#" to GDB where
+ // # is the tty for the newly created xterm
+ m_bIsConsole = (target && target->GetTargetType() == ttConsoleOnly);
+ if (m_bIsConsole)
+ {
+ if (RunNixConsole() > 0 )
+ { wxString gdbTtyCmd;
+ gdbTtyCmd << wxT("tty ") << m_ConsoleTty;
+ m_State.GetDriver()->QueueCommand(new DebuggerCmd(m_State.GetDriver(), gdbTtyCmd, true));
+ DebugLog(wxString::Format( _("Queued:[%s]"), gdbTtyCmd.c_str()) );
+ }
+ }//if
+ #endif//def __WXGTK__
+
// Don't issue 'run' if attaching to a process (Bug #1391904)
if (m_PidToAttach == 0)
m_State.GetDriver()->Start(m_BreakOnEntry);
@@ -1503,12 +1522,21 @@
void DebuggerGDB::Stop()
{
+ // m_Process is PipedProcess I/O; m_Pid is debugger pid
if (m_pProcess && m_Pid)
{
if (IsStopped())
{
RunCommand(CMD_STOP);
m_pProcess->CloseOutput();
+ #ifdef __WXGTK__
+ // kill any linux console //(pecan 2007/2/06)
+ if ( m_bIsConsole && (m_nConsolePid > 0) )
+ {
+ ::wxKill(m_nConsolePid);
+ m_nConsolePid = 0;
+ }
+ #endif
}
else
{
@@ -2196,3 +2224,101 @@
{
Configure();
}
+// ----------------------------------------------------------------------------
+int DebuggerGDB::RunNixConsole()
+// ----------------------------------------------------------------------------
+{
+ // start the xterm and put the shell to sleep with -e sleep 80000
+ // fetch the xterm tty so we can issue to gdb a "tty /dev/pts/#"
+ // redirecting program stdin/stdout/stderr to the xterm console.
+
+ #ifndef __WXMSW__
+ wxString cmd;
+ wxString title = wxT("Program Console");
+ m_nConsolePid = 0;
+ // for non-win platforms, use m_ConsoleTerm to run the console app
+ wxString term = Manager::Get()->GetConfigManager(_T("app"))->Read(_T("/console_terminal"), DEFAULT_CONSOLE_TERM);
+ //term.Replace(_T("$TITLE"), _T("'") + _T("*nixConsole") + _T("'"));
+ term.Replace(_T("$TITLE"), _T("'") + title + _T("'"));
+ cmd << term << _T(" ");
+ cmd << wxT("sleep ");
+ cmd << 80000 + ::wxGetProcessId(); //make a unique sleep command
+
+ Manager::Get()->GetMacrosManager()->ReplaceEnvVars(cmd);
+ //Manager::Get()->GetMessageManager()->Log(m_PageIndex, _("Executing: %s"), cmd.c_str() );
+ DebugLog(wxString::Format( _("Executing: %s"), cmd.c_str()) );
+ //start xterm -e sleep {some unique # of seconds}
+ m_nConsolePid = wxExecute(cmd, wxEXEC_ASYNC);
+ if (m_nConsolePid <= 0) return -1;
+
+ // Issue the PS command to get the /dev/tty device name
+ // First, wait for the xterm to settle down, else PS won't see the sleep task
+ Manager::Yield();
+ ::wxSleep(1);
+ m_ConsoleTty = GetConsoleTty(m_nConsolePid);
+ if (not m_ConsoleTty.IsEmpty() )
+ return m_nConsolePid;
+ // failed to find the console tty
+ DebugLog( wxT("Console Execution error:failed to find console tty."));
+ ::wxKill(m_nConsolePid);
+ m_nConsolePid = 0;
+ #endif//ndef __WWXMSW__
+ return -1;
+}
+// ----------------------------------------------------------------------------
+wxString DebuggerGDB::GetConsoleTty(int ConsolePid)
+// ----------------------------------------------------------------------------
+{
+ // execute the ps -xo command and read PS output to get the /dev/tty field
+
+ unsigned long ConsPid = ConsolePid;
+ wxString psCmd;
+ wxArrayString psOutput;
+ wxArrayString psErrors;
+
+ psCmd << wxT("ps x -o tty,pid,command");
+ DebugLog(wxString::Format( _("Executing: %s"), psCmd.c_str()) );
+ int result = wxExecute(psCmd, psOutput, psErrors, wxEXEC_SYNC);
+ psCmd.Clear();
+ if (result != 0)
+ { psCmd << wxT("Result of ps x:") << result;
+ DebugLog(wxString::Format( _("Execution Error:"), psCmd.c_str()) );
+ return wxEmptyString;
+ }
+
+ wxString ConsTtyStr;
+ wxString ConsPidStr;
+ ConsPidStr << ConsPid;
+ //find task with our unique sleep time
+ wxString uniqueSleepTimeStr;
+ uniqueSleepTimeStr << wxT("sleep ") << 80000 + ::wxGetProcessId();
+ // search the output of "ps pid" command
+ int knt = psOutput.GetCount();
+ for (int i=knt-1; i>-1; --i)
+ { psCmd = psOutput.Item(i);
+ DebugLog(wxString::Format( _("PS result: %s"), psCmd.c_str()) );
+ // find the pts/# or tty/# or whatever it's called
+ // by seaching the output or out "ps x" command.
+ // The output of ps looks like:
+ // TT PID COMMAND
+ // pts/0 13342 /bin/sh ./run.sh
+ // pts/0 13343 /home/pecan/devel/trunk/src/devel/codeblocks
+ // pts/0 13361 /usr/bin/gdb -nx -fullname -quiet -args ./conio
+ // pts/0 13362 xterm -font -*-*-*-*-*-*-20-*-*-*-*-*-*-* -T Program Console -e sleep 93343
+ // pts/2 13363 sleep 93343
+ // ? 13365 /home/pecan/proj/conio/conio
+ // pts/1 13370 ps x -o tty,pid,command
+
+ if (psCmd.Contains(uniqueSleepTimeStr))
+ { // found sleep 93343 string, extract tty field
+ ConsTtyStr = wxT("/dev/") + psCmd.BeforeFirst(' ');
+ DebugLog(wxString::Format( _("TTY is[%s]"), ConsTtyStr.c_str()) );
+ return ConsTtyStr;
+ }//if
+ }//for
+
+ knt = psErrors.GetCount();
+ for (int i=0; i<knt; ++i)
+ DebugLog(wxString::Format( _("PS Error:%s"), psErrors.Item(i).c_str()) );
+ return wxEmptyString;
+}
Index: debuggergdb.h
===================================================================
--- debuggergdb.h (revision 3659)
+++ debuggergdb.h (working copy)
@@ -205,6 +205,13 @@
int m_HookId; // project loader hook ID
+ // Linux console support
+ int RunNixConsole();
+ wxString GetConsoleTty(int ConsolePid);
+ bool m_bIsConsole;
+ int m_nConsolePid;
+ wxString m_ConsoleTty;
+
DECLARE_EVENT_TABLE()
};
--- End code ---
kramed:
Thank you! I applied the patch. When I start the debugger the terminal opens for a brief second and closes before I can see if there is any output to the screen. Does this patch work with last nights revision? Im trying to think of why it may be closing before I even get to a breakpoint.
kramed:
I reverted to SVN 3659 but the problem with the console automatically closing remains. This is quite upsetting as I had been using CodeBlocks under the assumption it was full platform independent. Any other suggestions?
Pecan:
Hold on for a couple of hours. I'll update and see what's going on.
This patch has been working for me for some time now. Something must have changed.
What OS/distribution are you using.
Can you give me a short minimal pgm that causes the problem?
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