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tdelibs/kdecore/kdebug.cpp

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/* This file is part of the KDE libraries
Copyright (C) 1997 Matthias Kalle Dalheimer (kalle@kde.org)
2002 Holger Freyther (freyther@kde.org)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "kdebug.h"
#ifdef NDEBUG
#undef kdDebug
#endif
#include "kdebugdcopiface.h"
#include "kapplication.h"
#include "kglobal.h"
#include "kinstance.h"
#include "kstandarddirs.h"
#include <tqmessagebox.h>
#include <klocale.h>
#include <tqfile.h>
#include <tqintdict.h>
#include <tqstring.h>
#include <tqdatetime.h>
#include <tqpoint.h>
#include <tqrect.h>
#include <tqregion.h>
#include <tqstringlist.h>
#include <tqpen.h>
#include <tqbrush.h>
#include <tqsize.h>
#include <kurl.h>
#include <stdlib.h> // abort
#include <unistd.h> // getpid
#include <stdarg.h> // vararg stuff
#include <ctype.h> // isprint
#include <syslog.h>
#include <errno.h>
#include <cstring>
#include <kconfig.h>
#include "kstaticdeleter.h"
#include <config.h>
#ifdef HAVE_BACKTRACE
#include BACKTRACE_H
#ifdef HAVE_DLFCN_H
#include <dlfcn.h>
#endif
#ifdef HAVE_ABI_CXA_DEMANGLE
#include <cxxabi.h>
#endif
#include <link.h>
#ifdef WITH_LIBBFD
/* newer versions of libbfd require some autotools-specific macros to be defined */
/* see binutils Bug 14243 and 14072 */
#define PACKAGE kdelibs
#define PACKAGE_VERSION KDE_VERSION
#include <bfd.h>
#ifdef HAVE_DEMANGLE_H
#include <demangle.h>
#endif // HAVE_DEMANGLE_H
#endif // WITH_LIBBFD
#endif // HAVE_BACKTRACE
#ifdef HAVE_ALLOCA_H
#include <alloca.h>
#endif // HAVE_ALLOCA_H
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif // HAVE_STDINT_H
class KDebugEntry;
class KDebugEntry
{
public:
KDebugEntry (int n, const TQCString& d) {number=n; descr=d;}
unsigned int number;
TQCString descr;
};
static TQIntDict<KDebugEntry> *KDebugCache;
static KStaticDeleter< TQIntDict<KDebugEntry> > kdd;
static TQCString getDescrFromNum(unsigned int _num)
{
if (!KDebugCache) {
kdd.setObject(KDebugCache, new TQIntDict<KDebugEntry>( 601 ));
// Do not call this deleter from ~KApplication
KGlobal::unregisterStaticDeleter(&kdd);
KDebugCache->setAutoDelete(true);
}
KDebugEntry *ent = KDebugCache->find( _num );
if ( ent )
return ent->descr;
if ( !KDebugCache->isEmpty() ) // areas already loaded
return TQCString();
TQString filename(locate("config","kdebug.areas"));
if (filename.isEmpty())
return TQCString();
TQFile file(filename);
if (!file.open(IO_ReadOnly)) {
qWarning("Couldn't open %s", filename.local8Bit().data());
file.close();
return TQCString();
}
uint lineNumber=0;
TQCString line(1024);
int len;
while (( len = file.readLine(line.data(),line.size()-1) ) > 0) {
int i=0;
++lineNumber;
while (line[i] && line[i] <= ' ')
i++;
unsigned char ch=line[i];
if ( !ch || ch =='#' || ch =='\n')
continue; // We have an eof, a comment or an empty line
if (ch < '0' && ch > '9') {
qWarning("Syntax error: no number (line %u)",lineNumber);
continue;
}
const int numStart=i;
do {
ch=line[++i];
} while ( ch >= '0' && ch <= '9');
const TQ_ULONG number =line.mid(numStart,i).toULong();
while (line[i] && line[i] <= ' ')
i++;
KDebugCache->insert(number, new KDebugEntry(number, line.mid(i, len-i-1)));
}
file.close();
ent = KDebugCache->find( _num );
if ( ent )
return ent->descr;
return TQCString();
}
enum DebugLevels {
KDEBUG_INFO= 0,
KDEBUG_WARN= 1,
KDEBUG_ERROR= 2,
KDEBUG_FATAL= 3
};
struct kDebugPrivate {
kDebugPrivate() :
oldarea(0), config(0) { }
~kDebugPrivate() { delete config; }
TQCString aAreaName;
unsigned int oldarea;
KConfig *config;
};
static kDebugPrivate *kDebug_data = 0;
static KStaticDeleter<kDebugPrivate> pcd;
static KStaticDeleter<KDebugDCOPIface> dcopsd;
static KDebugDCOPIface* kDebugDCOPIface = 0;
static void kDebugBackend( unsigned short nLevel, unsigned int nArea, const char *data)
{
if ( !kDebug_data )
{
pcd.setObject(kDebug_data, new kDebugPrivate());
// Do not call this deleter from ~KApplication
KGlobal::unregisterStaticDeleter(&pcd);
// create the dcop interface if it has not been created yet
if (!kDebugDCOPIface)
{
kDebugDCOPIface = dcopsd.setObject(kDebugDCOPIface, new KDebugDCOPIface);
}
}
if (!kDebug_data->config && KGlobal::_instance )
{
kDebug_data->config = new KConfig("kdebugrc", false, false);
kDebug_data->config->setGroup("0");
//AB: this is necessary here, otherwise all output with area 0 won't be
//prefixed with anything, unless something with area != 0 is called before
if ( KGlobal::_instance )
kDebug_data->aAreaName = KGlobal::instance()->instanceName();
}
if ( kDebug_data->oldarea != nArea ) {
kDebug_data->oldarea = nArea;
if( KGlobal::_instance ) {
if ( nArea > 0 ) {
kDebug_data->aAreaName = getDescrFromNum(nArea);
}
if ( nArea == 0 || kDebug_data->aAreaName.isEmpty() ) {
kDebug_data->aAreaName = KGlobal::instance()->instanceName();
}
}
}
int nPriority = 0;
TQString aCaption;
/* Determine output */
TQString key;
switch( nLevel )
{
case KDEBUG_INFO:
key = "InfoOutput";
aCaption = "Info";
nPriority = LOG_INFO;
break;
case KDEBUG_WARN:
key = "WarnOutput";
aCaption = "Warning";
nPriority = LOG_WARNING;
break;
case KDEBUG_FATAL:
key = "FatalOutput";
aCaption = "Fatal Error";
nPriority = LOG_CRIT;
break;
case KDEBUG_ERROR:
default:
/* Programmer error, use "Error" as default */
key = "ErrorOutput";
aCaption = "Error";
nPriority = LOG_ERR;
break;
}
short nOutput = -1;
if ( kDebug_data->config ) {
kDebug_data->config->setGroup( TQString::number(static_cast<int>(nArea)) );
nOutput = kDebug_data->config->readNumEntry(key, -1);
if( nOutput == -1 ) {
kDebug_data->config->setGroup( TQString::fromAscii("Default") );
nOutput = kDebug_data->config->readNumEntry(key, -1);
}
}
// if no output mode is specified default to no stderr output
// NOTE: don't set this to 4 (no output) because in that case you won't be
// able to get any output from applications which don't create
// KApplication objects.
if ( nOutput == -1 ) {
nOutput = 2;
}
// If the application doesn't have a TQApplication object it can't use
// a messagebox, as well as in case of GUI is disabled.
if ( nOutput == 1 && ( !kapp || !kapp->guiEnabled()) ) {
nOutput = 2;
} else if ( nOutput == 4 && nLevel != KDEBUG_FATAL ) {
return;
}
const int BUFSIZE = 4096;
char buf[BUFSIZE];
if ( !kDebug_data->aAreaName.isEmpty() ) {
strlcpy( buf, kDebug_data->aAreaName.data(), BUFSIZE );
strlcat( buf, ": ", BUFSIZE );
strlcat( buf, data, BUFSIZE );
}
else
strlcpy( buf, data, BUFSIZE );
// Output
switch( nOutput )
{
case 0: // File
{
const char* aKey;
switch( nLevel )
{
case KDEBUG_INFO:
aKey = "InfoFilename";
break;
case KDEBUG_WARN:
aKey = "WarnFilename";
break;
case KDEBUG_FATAL:
aKey = "FatalFilename";
break;
case KDEBUG_ERROR:
default:
aKey = "ErrorFilename";
break;
}
TQFile aOutputFile( kDebug_data->config->readPathEntry(aKey, "kdebug.dbg") );
aOutputFile.open( (TQIODevice_OpenModeFlag)((int)IO_WriteOnly | (int)IO_Append | (int)IO_Raw) );
aOutputFile.writeBlock( buf, strlen( buf ) );
aOutputFile.close();
break;
}
case 1: // Message Box
{
// Since we are in kdecore here, we cannot use KMsgBox and use
// TQMessageBox instead
if ( !kDebug_data->aAreaName.isEmpty() )
aCaption += TQString("(%1)").arg( QString(kDebug_data->aAreaName) );
TQMessageBox::warning( 0L, aCaption, data, i18n("&OK") );
break;
}
case 2: // Shell
{
write( 2, buf, strlen( buf ) ); //fputs( buf, stderr );
break;
}
case 3: // syslog
{
syslog( nPriority, "%s", buf);
break;
}
}
// check if we should abort
if( ( nLevel == KDEBUG_FATAL )
&& ( !kDebug_data->config || kDebug_data->config->readNumEntry( "AbortFatal", 1 ) ) )
abort();
}
kdbgstream &perror( kdbgstream &s) { return s << TQString(TQString::fromLocal8Bit(strerror(errno))); }
kdbgstream kdDebug(int area) { return kdbgstream(area, KDEBUG_INFO); }
kdbgstream kdDebug(bool cond, int area) { if (cond) return kdbgstream(area, KDEBUG_INFO); else return kdbgstream(0, 0, false); }
kdbgstream kdError(int area) { return kdbgstream("ERROR: ", area, KDEBUG_ERROR); }
kdbgstream kdError(bool cond, int area) { if (cond) return kdbgstream("ERROR: ", area, KDEBUG_ERROR); else return kdbgstream(0,0,false); }
kdbgstream kdWarning(int area) { return kdbgstream("WARNING: ", area, KDEBUG_WARN); }
kdbgstream kdWarning(bool cond, int area) { if (cond) return kdbgstream("WARNING: ", area, KDEBUG_WARN); else return kdbgstream(0,0,false); }
kdbgstream kdFatal(int area) { return kdbgstream("FATAL: ", area, KDEBUG_FATAL); }
kdbgstream kdFatal(bool cond, int area) { if (cond) return kdbgstream("FATAL: ", area, KDEBUG_FATAL); else return kdbgstream(0,0,false); }
kdbgstream::kdbgstream(kdbgstream &str)
: output(str.output), area(str.area), level(str.level), print(str.print)
{
str.output.truncate(0);
}
void kdbgstream::flush() {
if (output.isEmpty() || !print)
return;
kDebugBackend( level, area, output.local8Bit().data() );
output = TQString::null;
}
kdbgstream &kdbgstream::form(const char *format, ...)
{
char buf[4096];
va_list arguments;
va_start( arguments, format );
vsnprintf( buf, sizeof(buf), format, arguments );
va_end(arguments);
*this << buf;
return *this;
}
kdbgstream::~kdbgstream() {
if (!output.isEmpty()) {
fprintf(stderr, "ASSERT: debug output not ended with \\n\n");
TQString backtrace = kdBacktrace();
if (backtrace.ascii() != NULL) {
fprintf(stderr, "%s", backtrace.latin1());
}
*this << "\n";
}
}
kdbgstream& kdbgstream::operator << (char ch)
{
if (!print) return *this;
if (!isprint(ch))
output += "\\x" + TQString::number( static_cast<uint>( ch ), 16 ).rightJustify(2, '0');
else {
output += ch;
if (ch == '\n') flush();
}
return *this;
}
kdbgstream& kdbgstream::operator << (TQChar ch)
{
if (!print) return *this;
if (!ch.isPrint())
output += "\\x" + TQString::number( ch.unicode(), 16 ).rightJustify(2, '0');
else {
output += ch;
if (ch == QChar('\n')) flush();
}
return *this;
}
kdbgstream& kdbgstream::operator << (TQWidget* widget)
{
return *this << const_cast< const TQWidget* >( widget );
}
kdbgstream& kdbgstream::operator << (const TQWidget* widget)
{
TQString string, temp;
// -----
if(widget==0)
{
string=(TQString)"[Null pointer]";
} else {
temp.setNum((ulong)widget, 16);
string=(TQString)"["+widget->className()+" pointer "
+ "(0x" + temp + ")";
if(widget->name(0)==0)
{
string += " to unnamed widget, ";
} else {
string += (TQString)" to widget " + widget->name() + ", ";
}
string += "geometry="
+ TQString().setNum(widget->width())
+ "x"+TQString().setNum(widget->height())
+ "+"+TQString().setNum(widget->x())
+ "+"+TQString().setNum(widget->y())
+ "]";
}
if (!print)
{
return *this;
}
output += string;
if (output.at(output.length() -1 ) == QChar('\n'))
{
flush();
}
return *this;
}
/*
* either use 'output' directly and do the flush if needed
* or use the TQString operator which calls the char* operator
*
*/
kdbgstream& kdbgstream::operator<<( const TQDateTime& time) {
*this << time.toString();
return *this;
}
kdbgstream& kdbgstream::operator<<( const TQDate& date) {
*this << TQString(date.toString());
return *this;
}
kdbgstream& kdbgstream::operator<<( const TQTime& time ) {
*this << TQString(time.toString());
return *this;
}
kdbgstream& kdbgstream::operator<<( const TQPoint& p ) {
*this << "(" << p.x() << ", " << p.y() << ")";
return *this;
}
kdbgstream& kdbgstream::operator<<( const TQSize& s ) {
*this << "[" << s.width() << "x" << s.height() << "]";
return *this;
}
kdbgstream& kdbgstream::operator<<( const TQRect& r ) {
*this << "[" << r.x() << "," << r.y() << " - " << r.width() << "x" << r.height() << "]";
return *this;
}
kdbgstream& kdbgstream::operator<<( const TQRegion& reg ) {
*this<< "[ ";
TQMemArray<TQRect>rs=reg.rects();
for (uint i=0;i<rs.size();++i)
*this << TQString(TQString("[%1,%2 - %3x%4] ").arg(rs[i].x()).arg(rs[i].y()).arg(rs[i].width()).arg(rs[i].height() )) ;
*this <<"]";
return *this;
}
kdbgstream& kdbgstream::operator<<( const KURL& u ) {
*this << u.prettyURL();
return *this;
}
kdbgstream& kdbgstream::operator<<( const TQStringList& l ) {
*this << "(";
*this << l.join(",");
*this << ")";
return *this;
}
kdbgstream& kdbgstream::operator<<( const TQColor& c ) {
if ( c.isValid() )
*this << TQString(c.name());
else
*this << "(invalid/default)";
return *this;
}
kdbgstream& kdbgstream::operator<<( const TQPen& p ) {
static const char* const s_penStyles[] = {
"NoPen", "SolidLine", "DashLine", "DotLine", "DashDotLine",
"DashDotDotLine" };
static const char* const s_capStyles[] = {
"FlatCap", "SquareCap", "RoundCap" };
*this << "[ style:";
*this << s_penStyles[ p.style() ];
*this << " width:";
*this << p.width();
*this << " color:";
if ( p.color().isValid() )
*this << TQString(p.color().name());
else
*this <<"(invalid/default)";
if ( p.width() > 0 ) // cap style doesn't matter, otherwise
{
*this << " capstyle:";
*this << s_capStyles[ p.capStyle() >> 4 ];
// join style omitted
}
*this <<" ]";
return *this;
}
kdbgstream& kdbgstream::operator<<( const TQBrush& b) {
static const char* const s_brushStyles[] = {
"NoBrush", "SolidPattern", "Dense1Pattern", "Dense2Pattern", "Dense3Pattern",
"Dense4Pattern", "Dense5Pattern", "Dense6Pattern", "Dense7Pattern",
"HorPattern", "VerPattern", "CrossPattern", "BDiagPattern", "FDiagPattern",
"DiagCrossPattern" };
*this <<"[ style: ";
*this <<s_brushStyles[ b.style() ];
*this <<" color: ";
// can't use operator<<(str, b.color()) because that terminates a kdbgstream (flushes)
if ( b.color().isValid() )
*this << TQString(b.color().name()) ;
else
*this <<"(invalid/default)";
if ( b.pixmap() )
*this <<" has a pixmap";
*this <<" ]";
return *this;
}
kdbgstream& kdbgstream::operator<<( const TQVariant& v) {
*this << "[variant: ";
*this << v.typeName();
// For now we just attempt a conversion to string.
// Feel free to switch(v.type()) and improve the output.
*this << " toString=";
*this << v.toString();
*this << "]";
return *this;
}
kdbgstream& kdbgstream::operator<<( const TQByteArray& data) {
if (!print) return *this;
output += '[';
unsigned int i = 0;
unsigned int sz = QMIN( data.size(), 64 );
for ( ; i < sz ; ++i ) {
output += TQString::number( (unsigned char) data[i], 16 ).rightJustify(2, '0');
if ( i < sz )
output += ' ';
}
if ( sz < data.size() )
output += "...";
output += ']';
return *this;
}
#ifdef HAVE_BACKTRACE
struct BacktraceFunctionInfo {
const void *addr; //< the address of function returned by backtrace()
const char* fileName; //< the file of binary owning the function (e.g. shared library or current header)
const void *base; //< the base address there the binary is loaded to
uintptr_t offset; //< offset of the function in binary (base - address)
TQString functionName; //< mangled name of function
TQString prettyName; //< demangled name of function
TQString sourceName; //< name of source file function declared in
unsigned sourceLine; //< line where function defined
};
#ifdef WITH_LIBBFD
// load symbol table from file
asymbol** bfdLoadSymtab (bfd *abfd) {
long symCount; // count of entries in symbol table
long symtab_sz; // size of the table
asymbol** rv;
bfd_boolean dynamic = FALSE;
// make shure the file has symbol table
if ((bfd_get_file_flags (abfd) & HAS_SYMS) == 0){
return 0;
}
// determin the amount of space we'll need to store the table
symtab_sz = bfd_get_symtab_upper_bound (abfd);
if (symtab_sz == 0) {
symtab_sz = bfd_get_dynamic_symtab_upper_bound (abfd);
dynamic = TRUE;
}
if (symtab_sz < 0) {
return 0;
}
// allocate memory
rv = (asymbol **) malloc(symtab_sz); // dunno, why not malloc
if ( !rv ) {
return 0;
}
// actually load the table
if (dynamic) {
symCount = bfd_canonicalize_dynamic_symtab (abfd, rv);
} else {
symCount = bfd_canonicalize_symtab (abfd, rv);
}
if (symCount < 0) {
if (rv) {
free(rv);
}
return 0;
}
return rv;
}
void bfdFillAdditionalFunctionsInfo(BacktraceFunctionInfo &func) {
static bool inited=0;
if (!inited) {
bfd_init();
inited=1;
}
bfd *abfd = bfd_openr(func.fileName, 0); // a bfd object
if( !abfd ) {
return;
}
// check format of the object
if( !bfd_check_format(abfd, bfd_object) ) {
bfd_close(abfd);
return;
}
// load symbol table
asymbol **syms= bfdLoadSymtab(abfd);
if(!syms) {
bfd_close(abfd);
return;
}
// found source file and line for given address
for (asection *sect = abfd->sections; sect != NULL; sect = sect->next) {
if (bfd_get_section_flags(abfd, sect) & SEC_ALLOC) {
bfd_vma sectStart = bfd_get_section_vma(abfd, sect);
bfd_vma sectEnd = sectStart + bfd_section_size(abfd, sect);
if (sectStart <= func.offset && func.offset < sectEnd) {
bfd_vma sectOffset = func.offset - sectStart;
const char* functionName;
const char* sourceName;
unsigned sourceLine;
if (bfd_find_nearest_line(abfd, sect, syms, sectOffset,
&sourceName, &functionName, &sourceLine))
{
func.sourceName = sourceName;
func.sourceLine = sourceLine;
if(func.functionName.isEmpty()) {
func.functionName = TQString::fromAscii(functionName);
}
break;
}
}
}
}
#ifdef HAVE_DEMANGLE_H
if(func.prettyName.isEmpty() && !func.functionName.isEmpty()) {
char *demangled = bfd_demangle(abfd, func.functionName.ascii(), DMGL_AUTO | DMGL_PARAMS);
if (demangled) {
func.prettyName = demangled;
free(demangled);
}
}
#endif // HAVE_DEMANGLE_H
if( syms ) {
free(syms);
}
bfd_close(abfd);
}
#endif // WITH_LIBBFD
void fillAdditionalFunctionsInfo(BacktraceFunctionInfo &func) {
#ifdef WITH_LIBBFD
bfdFillAdditionalFunctionsInfo(func);
#endif // WITH_LIBBFD
#ifdef HAVE_ABI_CXA_DEMANGLE
if(func.prettyName.isEmpty() && !func.functionName.isEmpty()) {
int status=0;
char *demangled = abi::__cxa_demangle(func.functionName.ascii(), 0, 0, &status);
if (demangled) {
func.prettyName = demangled;
free(demangled);
}
}
#endif // HAVE_ABI_CXA_DEMANGLE
}
TQString formatBacktrace(void *addr) {
TQString rv;
BacktraceFunctionInfo func;
func.addr = addr;
// NOTE: if somebody would compile for some non-linux-glibc platform
// check if dladdr function is avalible there
Dl_info info;
dladdr(func.addr, &info); // obtain information about the function.
func.fileName = info.dli_fname;
func.base = info.dli_fbase;
func.offset = (uintptr_t)func.addr - (uintptr_t)func.base;
func.functionName = TQString::fromAscii(info.dli_sname);
func.sourceLine = 0;
fillAdditionalFunctionsInfo(func);
rv.sprintf("0x%0*lx", (int) sizeof(void*)*2, (uintptr_t) func.addr);
rv += " in ";
if (!func.prettyName.isEmpty()) {
rv += func.prettyName;
} else if (!func.functionName.isEmpty()) {
rv += func.functionName;
} else {
rv += "??";
}
if (!func.sourceName.isEmpty()) {
rv += " in ";
rv += func.sourceName;
rv += ":";
rv += func.sourceLine ? TQString::number(func.sourceLine) : "??";
} else if (func.fileName && func.fileName[0]) {
rv += TQString().sprintf(" from %s:0x%08lx",func.fileName, func.offset);
} else {
rv += " from ??";
}
return rv;
}
#endif // HAVE_BACKTRACE
TQString kdBacktrace(int levels)
{
TQString rv;
#ifdef HAVE_BACKTRACE
if (levels < 0 || levels > 256 ) {
levels = 256;
}
rv = "[\n";
if (levels) {
#ifdef HAVE_ALLOCA
void** trace = (void**)alloca(levels * sizeof(void*));
#else // HAVE_ALLOCA
void* trace[256];
#endif // HAVE_ALLOCA
levels = backtrace(trace, levels);
if (levels) {
for (int i = 0; i < levels; ++i) {
rv += QString().sprintf("#%-2d ", i);
rv += formatBacktrace(trace[i]);
rv += '\n';
}
} else {
rv += "backtrace() failed\n";
}
}
rv += "]\n";
#endif // HAVE_BACKTRACE
return rv;
}
// Keep for ABI compatability for some time
// FIXME remove this (2013-08-18, 18:09, Fat-Zer)
TQString kdBacktrace()
{
return kdBacktrace(-1 /*all*/);
}
void kdBacktraceFD(int fd) {
#ifdef HAVE_BACKTRACE
void *trace[256];
int levels;
levels = backtrace(trace, 256);
if (levels) {
backtrace_symbols_fd(trace, levels, fd);
}
#endif // HAVE_BACKTRACE
}
void kdClearDebugConfig()
{
if (kDebug_data) {
delete kDebug_data->config;
kDebug_data->config = 0;
}
}
// Needed for --enable-final
#ifdef NDEBUG
#define kdDebug kndDebug
#endif
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