TDE base libraries and programs
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/*****************************************************************
* drkonqi - The KDE Crash Handler
*
* Copyright (C) 2000-2003 Hans Petter Bieker <bieker@kde.org>
*
* 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 "config.h"
#include <tqfile.h>
#include <tqregexp.h>
#include <kprocess.h>
#include <kdebug.h>
#include <kstandarddirs.h>
#include <tdemessagebox.h>
#include <tdelocale.h>
#include <tdetempfile.h>
#ifdef WITH_TDEHWLIB
#include <tdehardwaredevices.h>
#endif
#ifdef HAVE_ELFICON
// Elven things
extern "C" {
#include <libr.h>
#include <libr-icons.h>
}
#include <tqfileinfo.h>
#include <tdeio/tdelficon.h>
#endif // HAVE_ELFICON
#include "krashconf.h"
#include "backtrace.h"
#include "backtrace.moc"
BackTrace::BackTrace(const KrashConfig *krashconf, TQObject *parent,
const char *name)
: TQObject(parent, name),
m_krashconf(krashconf), m_temp(NULL), m_temp_cmd(NULL)
{
m_proc = new TDEProcess;
}
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;
delete m_temp_cmd;
}
void BackTrace::start()
{
TQString exec = m_krashconf->tryExec();
if ( !exec.isEmpty() && TDEStandardDirs::findExe(exec).isEmpty() )
{
TQObject * o = parent();
if (o && !o->inherits(TQWIDGET_OBJECT_NAME_STRING))
{
o = NULL;
}
KMessageBox::error(
(TQWidget *)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();
TQString 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);
// build the debugger command
TQString str = m_krashconf->debuggerBatch();
m_krashconf->expandString(str, true, m_temp->name());
// write the debugger command
m_temp_cmd = new KTempFile(TQString::null, TQString::null, 0700);
m_temp_cmd->setAutoDelete(TRUE);
handle = m_temp_cmd->handle();
const char* dbgcommand = str.latin1();
::write(handle, dbgcommand, strlen(dbgcommand)); // the command to execute the debugger
::write(handle, "\n", 1);
::fsync(handle);
m_temp_cmd->close();
// determine if yama has been used to prevent ptrace as normal user
bool need_root_access = false;
TQFile yamactl("/proc/sys/kernel/yama/ptrace_scope");
if (yamactl.exists()) {
if (yamactl.open(IO_ReadOnly)) {
TQTextStream stream(&yamactl);
TQString line;
line = stream.readLine();
if (line.toInt() != 0) {
need_root_access = true;
}
yamactl.close();
}
}
// start the debugger
m_proc = new TDEProcess;
m_proc->setUseShell(true);
if (need_root_access == false) {
*m_proc << m_temp_cmd->name();
}
else {
*m_proc << "tdesu -t --comment \"" << i18n("Administrative access is required to generate a backtrace") << "\" -c \"" << m_temp_cmd->name() << "\"";
}
connect(m_proc, TQT_SIGNAL(receivedStdout(TDEProcess*, char*, int)),
TQT_SLOT(slotReadInput(TDEProcess*, char*, int)));
connect(m_proc, TQT_SIGNAL(processExited(TDEProcess*)),
TQT_SLOT(slotProcessExited(TDEProcess*)));
m_proc->start ( TDEProcess::NotifyOnExit, TDEProcess::All );
}
void BackTrace::slotReadInput(TDEProcess *, char* buf, int buflen)
{
TQString newstr = TQString::fromLocal8Bit(buf, buflen);
newstr.replace("\n\n", "\n");
if (m_strBt.isEmpty()) {
if (newstr == "\n") {
newstr = "";
}
}
if (!newstr.startsWith(": ")) {
m_strBt.append(newstr);
emit append(newstr);
}
}
void BackTrace::slotProcessExited(TDEProcess *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(TQRegExp( m_krashconf->removeFromBacktraceRegExp()), TQString());
}
// fix threading info output
if( !m_krashconf->threadRegExp().isEmpty()) {
int pos = -1;
TQRegExp threadRegExpression( m_krashconf->threadRegExp());
do {
threadRegExpression.search(m_strBt);
pos = threadRegExpression.pos();
if (pos > -1) {
m_strBt.insert(threadRegExpression.pos()+1, "==== ");
}
} while (pos > -1);
}
if( m_krashconf->disableChecks())
return true;
// prepend and append newline, so that regexps like '\nwhatever\n' work on all lines
TQString strBt = '\n' + m_strBt + '\n';
// how many " ?? " in the bt ?
int unknown = 0;
if( !m_krashconf->invalidStackFrameRegExp().isEmpty()) {
int isfPos = strBt.find( TQRegExp( m_krashconf->invalidStackFrameRegExp()));
int islPos = strBt.find( m_krashconf->infoSharedLibraryHeader());
if ((isfPos >=0) && (isfPos < islPos)) {
unknown = true;
}
else {
unknown = false;
}
}
// how many stack frames in the bt ?
int frames = 0;
if( !m_krashconf->frameRegExp().isEmpty())
frames = strBt.contains( TQRegExp( m_krashconf->frameRegExp()));
else
frames = strBt.contains('\n');
bool tooShort = false;
if( !m_krashconf->neededInValidBacktraceRegExp().isEmpty())
tooShort = ( strBt.find( TQRegExp( m_krashconf->neededInValidBacktraceRegExp())) == -1 );
return !m_strBt.isNull() && !tooShort && (unknown < frames);
}
// remove stack frames added because of TDECrash
void BackTrace::processBacktrace()
{
if( !m_krashconf->kcrashRegExp().isEmpty()) {
TQRegExp kcrashregexp( m_krashconf->kcrashRegExp());
kcrashregexp.setMinimal(true);
int pos = 0;
int prevpos = 0;
while ((pos = kcrashregexp.search( m_strBt, pos )) >= 0) {
if (prevpos == pos) {
// Avoid infinite loop
// Shouldn't ever get here, but given that this is a crash handler, better safe than sorry!
break;
}
prevpos = pos;
if( pos >= 0 ) {
int len = kcrashregexp.matchedLength();
int nextinfochunkpos = m_strBt.find("====", pos);
if (nextinfochunkpos >= 0) {
// Trying to delete too much!
int limitedlen = nextinfochunkpos - pos;
TQString limitedstrBt = m_strBt.mid(pos, limitedlen);
int limitedpos = kcrashregexp.search( limitedstrBt );
if (limitedpos >= 0) {
len = kcrashregexp.matchedLength();
}
else {
len = 0;
}
}
if ((pos >= 0) && (len > 0)) {
if( m_strBt[ pos ] == '\n' ) {
++pos;
--len;
}
m_strBt.remove( pos, len );
m_strBt.insert( pos, TQString::fromLatin1( "[TDECrash handler]\n" ));
}
}
if (pos < 0) {
// Avoid infinite loop
// Shouldn't ever get here, but given that this is a crash handler, better safe than sorry!
break;
}
pos++;
if ((uint)pos >= m_strBt.length()) {
// Avoid infinite loop
// Shouldn't ever get here, but given that this is a crash handler, better safe than sorry!
break;
}
}
}
if( !m_krashconf->kcrashRegExpSingle().isEmpty()) {
TQRegExp kcrashregexp( m_krashconf->kcrashRegExpSingle());
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 );
}
}
#ifdef HAVE_ELFICON
m_strBt.append("\n==== (tdemetainfo) application version information ====\n");
// Extract embedded SCM metadata from the crashed application
TQString crashedExec = TDEStandardDirs::findExe(m_krashconf->execName());
if (crashedExec.startsWith("/")) {
libr_file *handle = NULL;
libr_access_t access = LIBR_READ;
if((handle = libr_open(const_cast<char*>(crashedExec.ascii()), access)) == NULL) {
kdWarning() << "failed to open file" << crashedExec << endl;
}
else {
TQString scmModule = elf_get_resource(handle, ".metadata_scmmodule");
TQString scmRevision = elf_get_resource(handle, ".metadata_scmrevision");
if (scmRevision != "") {
m_strBt.append(TQString("%1:\t%2:%3\n").arg(TQFileInfo(crashedExec).fileName()).arg(scmModule).arg(scmRevision));
}
}
libr_close(handle);
}
m_strBt.append("\n==== (tdemetainfo) library version information ====\n");
// Extract embedded SCM metadata from shared libraries
int islPos = m_strBt.find( m_krashconf->infoSharedLibraryHeader());
TQString infoSharedLibraryText = m_strBt.mid(islPos);
TQTextStream infoSharedLibraryTextStream(&infoSharedLibraryText, IO_ReadOnly);
infoSharedLibraryTextStream.readLine(); // Skip info header x1
infoSharedLibraryTextStream.readLine(); // Skip info header x2
TQString infoSharedLibraryLine = infoSharedLibraryTextStream.readLine();
while (infoSharedLibraryLine != TQString::null) {
TQStringList libraryInfoList = TQStringList::split(" ", infoSharedLibraryLine, false);
if (libraryInfoList.count() > 0) {
TQString libraryName = libraryInfoList[libraryInfoList.count()-1];
if (libraryName.startsWith("/")) {
libr_file *handle = NULL;
libr_access_t access = LIBR_READ;
if((handle = libr_open(const_cast<char*>(libraryName.ascii()), access)) == NULL) {
kdWarning() << "failed to open file " << libraryName << endl;
}
else {
TQString scmModule = elf_get_resource(handle, ".metadata_scmmodule");
TQString scmRevision = elf_get_resource(handle, ".metadata_scmrevision");
if (scmRevision != "") {
m_strBt.append(TQString("%1:\t%2:%3\n").arg(TQFileInfo(libraryName).fileName()).arg(scmModule).arg(scmRevision));
}
libr_close(handle);
}
}
}
infoSharedLibraryLine = infoSharedLibraryTextStream.readLine();
}
#endif // HAVE_ELFICON
#ifdef WITH_TDEHWLIB
// Append potentially important hardware information
m_strBt.append("\n==== (tdehwlib) hardware information ====\n");
TDEHardwareDevices *hwdevices = TDEGlobal::hardwareDevices();
TDEGenericHardwareList hwlist = hwdevices->listAllPhysicalDevices();
TDEGenericDevice *hwdevice;
for ( hwdevice = hwlist.first(); hwdevice; hwdevice = hwlist.next() ) {
if (hwdevice->type() == TDEGenericDeviceType::CPU) {
TDECPUDevice* cpudevice = static_cast<TDECPUDevice*>(hwdevice);
m_strBt.append(TQString("CPU core number:\t\t%1\n").arg(cpudevice->coreNumber()));
m_strBt.append(TQString("\tVendor:\t\t\t%1\n").arg(cpudevice->vendorName()));
m_strBt.append(TQString("\tModel:\t\t\t%1\n").arg(cpudevice->vendorModel()));
m_strBt.append(TQString("\tName:\t\t\t%1\n").arg(cpudevice->name()));
m_strBt.append(TQString("\tCurrent Frequency:\t%1 MHz\n").arg(cpudevice->frequency()));
m_strBt.append(TQString("\tMinimum Frequency:\t%1 MHz\n").arg(cpudevice->minFrequency()));
m_strBt.append(TQString("\tMaximum Frequency:\t%1 MHz\n").arg(cpudevice->maxFrequency()));
m_strBt.append("\n");
}
}
#endif
{
// Clean up hard to read debug blocks
TQRegExp kcrashregexp( "[^\n]\n==== ");
kcrashregexp.setMinimal(true);
int pos = 0;
while ((pos = kcrashregexp.search( m_strBt, pos )) >= 0) {
m_strBt.insert(pos+1, "\n");
}
}
}