Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdebase@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 181 insertions, 0 deletions

diff --git a/drkonqi/backtrace.cpp b/drkonqi/backtrace.cpp
new file mode 100644
index 000000000..1bf48a4c1
--- /dev/null
+++ b/drkonqi/backtrace.cpp
@@ -0,0 +1,181 @@
+/*****************************************************************
+ * drkonqi - The KDE Crash Handler
+ *
+ * Copyright (C) 2000-2003 Hans Petter Bieker <[email protected]>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *****************************************************************/
+
+#include <qfile.h>
+#include <qregexp.h>
+
+#include <kprocess.h>
+#include <kdebug.h>
+#include <kstandarddirs.h>
+#include <kmessagebox.h>
+#include <klocale.h>
+#include <ktempfile.h>
+
+#include "krashconf.h"
+#include "backtrace.h"
+#include "backtrace.moc"
+
+BackTrace::BackTrace(const KrashConfig *krashconf, QObject *parent,
+                     const char *name)
+  : QObject(parent, name),
+    m_krashconf(krashconf), m_temp(0)
+{
+  m_proc = new KProcess;
+}
+
+BackTrace::~BackTrace()
+{
+  pid_t pid = m_proc ? m_proc->pid() : 0;
+  // we don't want the gdb process to hang around
+  delete m_proc; // this will kill gdb (SIGKILL, signal 9)
+
+  // continue the process we ran backtrace on. Gdb sends SIGSTOP to the
+  // process. For some reason it doesn't work if we send the signal before
+  // gdb has exited, so we better wait for it.
+  // Do not touch it if we never ran backtrace.
+  if (pid)
+  {
+    waitpid(pid, NULL, 0);
+    kill(m_krashconf->pid(), SIGCONT);
+  }
+
+  delete m_temp;
+}
+
+void BackTrace::start()
+{
+  QString exec = m_krashconf->tryExec();
+  if ( !exec.isEmpty() && KStandardDirs::findExe(exec).isEmpty() )
+  {
+    QObject * o = parent();
+
+    if (o && !o->inherits("QWidget"))
+    {
+      o = NULL;
+    }
+
+    KMessageBox::error(
+                        (QWidget *)o,
+			i18n("Could not generate a backtrace as the debugger '%1' was not found.").arg(exec));
+    return;
+  }
+  m_temp = new KTempFile;
+  m_temp->setAutoDelete(TRUE);
+  int handle = m_temp->handle();
+  QString backtraceCommand = m_krashconf->backtraceCommand();
+  const char* bt = backtraceCommand.latin1();
+  ::write(handle, bt, strlen(bt)); // the command for a backtrace
+  ::write(handle, "\n", 1);
+  ::fsync(handle);
+
+  // start the debugger
+  m_proc = new KProcess;
+  m_proc->setUseShell(true);
+
+  QString str = m_krashconf->debuggerBatch();
+  m_krashconf->expandString(str, true, m_temp->name());
+
+  *m_proc << str;
+
+  connect(m_proc, SIGNAL(receivedStdout(KProcess*, char*, int)),
+          SLOT(slotReadInput(KProcess*, char*, int)));
+  connect(m_proc, SIGNAL(processExited(KProcess*)),
+          SLOT(slotProcessExited(KProcess*)));
+
+  m_proc->start ( KProcess::NotifyOnExit, KProcess::All );
+}
+
+void BackTrace::slotReadInput(KProcess *, char* buf, int buflen)
+{
+  QString newstr = QString::fromLocal8Bit(buf, buflen);
+  m_strBt.append(newstr);
+
+  emit append(newstr);
+}
+
+void BackTrace::slotProcessExited(KProcess *proc)
+{
+  // start it again
+  kill(m_krashconf->pid(), SIGCONT);
+
+  if (proc->normalExit() && (proc->exitStatus() == 0) &&
+      usefulBacktrace())
+  {
+    processBacktrace();
+    emit done(m_strBt);
+  }
+  else
+    emit someError();
+}
+
+// analyze backtrace for usefulness
+bool BackTrace::usefulBacktrace()
+{
+  // remove crap
+  if( !m_krashconf->removeFromBacktraceRegExp().isEmpty())
+    m_strBt.replace(QRegExp( m_krashconf->removeFromBacktraceRegExp()), QString::null);
+
+  if( m_krashconf->disableChecks())
+      return true;
+  // prepend and append newline, so that regexps like '\nwhatever\n' work on all lines
+  QString strBt = '\n' + m_strBt + '\n';
+  // how many " ?? " in the bt ?
+  int unknown = 0;
+  if( !m_krashconf->invalidStackFrameRegExp().isEmpty())
+    unknown = strBt.contains( QRegExp( m_krashconf->invalidStackFrameRegExp()));
+  // how many stack frames in the bt ?
+  int frames = 0;
+  if( !m_krashconf->frameRegExp().isEmpty())
+    frames = strBt.contains( QRegExp( m_krashconf->frameRegExp()));
+  else
+    frames = strBt.contains('\n');
+  bool tooShort = false;
+  if( !m_krashconf->neededInValidBacktraceRegExp().isEmpty())
+    tooShort = ( strBt.find( QRegExp( m_krashconf->neededInValidBacktraceRegExp())) == -1 );
+  return !m_strBt.isNull() && !tooShort && (unknown < frames);
+}
+
+// remove stack frames added because of KCrash
+void BackTrace::processBacktrace()
+{
+  if( !m_krashconf->kcrashRegExp().isEmpty())
+    {
+    QRegExp kcrashregexp( m_krashconf->kcrashRegExp());
+    int pos = kcrashregexp.search( m_strBt );
+    if( pos >= 0 )
+      {
+      int len = kcrashregexp.matchedLength();
+      if( m_strBt[ pos ] == '\n' )
+        {
+        ++pos;
+        --len;
+        }
+      m_strBt.remove( pos, len );
+      m_strBt.insert( pos, QString::fromLatin1( "[KCrash handler]\n" ));
+      }
+    }
+}