LCOV - code coverage report
Current view: top level - sal/osl/unx - signal.c (source / functions) Hit Total Coverage
Test: commit e02a6cb2c3e2b23b203b422e4e0680877f232636 Lines: 82 173 47.4 %
Date: 2014-04-14 Functions: 6 13 46.2 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /*
       3             :  * This file is part of the LibreOffice project.
       4             :  *
       5             :  * This Source Code Form is subject to the terms of the Mozilla Public
       6             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       7             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       8             :  *
       9             :  * This file incorporates work covered by the following license notice:
      10             :  *
      11             :  *   Licensed to the Apache Software Foundation (ASF) under one or more
      12             :  *   contributor license agreements. See the NOTICE file distributed
      13             :  *   with this work for additional information regarding copyright
      14             :  *   ownership. The ASF licenses this file to you under the Apache
      15             :  *   License, Version 2.0 (the "License"); you may not use this file
      16             :  *   except in compliance with the License. You may obtain a copy of
      17             :  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
      18             :  */
      19             : 
      20             : /* system headers */
      21             : #include "system.h"
      22             : 
      23             : #if defined( MACOSX )
      24             : 
      25             : #if defined( INTEL )
      26             : #include "backtrace.h"
      27             : #define INCLUDE_BACKTRACE
      28             : #ifdef SAL_ENABLE_CRASH_REPORT
      29             : #define STACKTYPE "MacOsX_X86"
      30             : #endif
      31             : #endif /* INTEL */
      32             : 
      33             : #endif /* MACOSX */
      34             : 
      35             : #ifdef LINUX
      36             : #include <execinfo.h>
      37             : #include <link.h>
      38             : #define INCLUDE_BACKTRACE
      39             : #if defined SAL_ENABLE_CRASH_REPORT
      40             : #define STACKTYPE "Linux"
      41             : #endif
      42             : #endif
      43             : 
      44             : #ifdef SOLARIS
      45             : 
      46             : #include "backtrace.h"
      47             : #define INCLUDE_BACKTRACE
      48             : 
      49             : #if defined SAL_ENABLE_CRASH_REPORT
      50             : #if defined( SPARC )
      51             : #define STACKTYPE "Solaris_Sparc"
      52             : #elif defined( INTEL )
      53             : #define STACKTYPE "Solaris_X86"
      54             : #else
      55             : #define STACKTYPE "Solaris_Unknown"
      56             : #endif
      57             : #endif
      58             : 
      59             : #endif /* defined SOLARIS */
      60             : 
      61             : #if defined INCLUDE_BACKTRACE
      62             : #define MAX_STACK_FRAMES 256
      63             : #endif
      64             : 
      65             : #include <osl/diagnose.h>
      66             : #include <osl/mutex.h>
      67             : #include <osl/signal.h>
      68             : #include <osl/process.h>
      69             : #include <osl/thread.h>
      70             : #include <sal/macros.h>
      71             : #include <rtl/bootstrap.h>
      72             : #include <rtl/digest.h>
      73             : 
      74             : #include "file_path_helper.h"
      75             : 
      76             : #define ACT_IGNORE  1
      77             : #define ACT_EXIT    2
      78             : #define ACT_SYSTEM  3
      79             : #define ACT_HIDE    4
      80             : #ifdef SAL_ENABLE_CRASH_REPORT
      81             : #    define ACT_ABORT   5
      82             : #else
      83             : #    define ACT_ABORT   ACT_SYSTEM
      84             : #endif
      85             : 
      86             : #if defined HAVE_VALGRIND_HEADERS
      87             : #include <valgrind/memcheck.h>
      88             : #endif
      89             : 
      90             : typedef struct _oslSignalHandlerImpl
      91             : {
      92             :     oslSignalHandlerFunction      Handler;
      93             :     void*                         pData;
      94             :     struct _oslSignalHandlerImpl* pNext;
      95             : } oslSignalHandlerImpl;
      96             : 
      97             : static struct SignalAction
      98             : {
      99             :     int Signal;
     100             :     int Action;
     101             :     void (*Handler)(int);
     102             : } Signals[] =
     103             : {
     104             :     { SIGHUP,    ACT_HIDE, NULL },    /* hangup */
     105             :     { SIGINT,    ACT_EXIT,   NULL },    /* interrupt (rubout) */
     106             :     { SIGQUIT,   ACT_EXIT,  NULL },    /* quit (ASCII FS) */
     107             :     { SIGILL,    ACT_SYSTEM,  NULL },    /* illegal instruction (not reset when caught) */
     108             : /* changed from ACT_ABOUT to ACT_SYSTEM to try and get collector to run*/
     109             :     { SIGTRAP,   ACT_ABORT,  NULL },    /* trace trap (not reset when caught) */
     110             : #if ( SIGIOT != SIGABRT )
     111             :     { SIGIOT,    ACT_ABORT,  NULL },    /* IOT instruction */
     112             : #endif
     113             :     { SIGABRT,   ACT_ABORT,  NULL },    /* used by abort, replace SIGIOT in the future */
     114             : #ifdef SIGEMT
     115             :     { SIGEMT,    ACT_SYSTEM,  NULL },    /* EMT instruction */
     116             : /* changed from ACT_ABORT to ACT_SYSTEM to remove handler*/
     117             : /* SIGEMT may also be used by the profiler - so it is probably not a good
     118             : plan to have the new handler use this signal*/
     119             : #endif
     120             :     { SIGFPE,    ACT_ABORT,  NULL },    /* floating point exception */
     121             :     { SIGKILL,   ACT_SYSTEM, NULL },    /* kill (cannot be caught or ignored) */
     122             :     { SIGBUS,    ACT_ABORT,  NULL },    /* bus error */
     123             :     { SIGSEGV,   ACT_ABORT,  NULL },    /* segmentation violation */
     124             : #ifdef SIGSYS
     125             :     { SIGSYS,    ACT_ABORT,  NULL },    /* bad argument to system call */
     126             : #endif
     127             :     { SIGPIPE,   ACT_HIDE,   NULL },    /* write on a pipe with no one to read it */
     128             :     { SIGALRM,   ACT_EXIT,   NULL },    /* alarm clock */
     129             :     { SIGTERM,   ACT_EXIT,   NULL },    /* software termination signal from kill */
     130             :     { SIGUSR1,   ACT_SYSTEM, NULL },    /* user defined signal 1 */
     131             :     { SIGUSR2,   ACT_SYSTEM, NULL },    /* user defined signal 2 */
     132             :     { SIGCHLD,   ACT_SYSTEM, NULL },    /* child status change */
     133             : #ifdef SIGPWR
     134             :     { SIGPWR,    ACT_IGNORE, NULL },    /* power-fail restart */
     135             : #endif
     136             :     { SIGWINCH,  ACT_IGNORE, NULL },    /* window size change */
     137             :     { SIGURG,    ACT_EXIT,   NULL },    /* urgent socket condition */
     138             : #ifdef SIGPOLL
     139             :     { SIGPOLL,   ACT_EXIT,   NULL },    /* pollable event occurred */
     140             : #endif
     141             :     { SIGSTOP,   ACT_SYSTEM, NULL },    /* stop (cannot be caught or ignored) */
     142             :     { SIGTSTP,   ACT_SYSTEM, NULL },    /* user stop requested from tty */
     143             :     { SIGCONT,   ACT_SYSTEM, NULL },    /* stopped process has been continued */
     144             :     { SIGTTIN,   ACT_SYSTEM, NULL },    /* background tty read attempted */
     145             :     { SIGTTOU,   ACT_SYSTEM, NULL },    /* background tty write attempted */
     146             :     { SIGVTALRM, ACT_EXIT,   NULL },    /* virtual timer expired */
     147             :     { SIGPROF,   ACT_SYSTEM,   NULL },    /* profiling timer expired */
     148             : /*Change from ACT_EXIT to ACT_SYSTEM for SIGPROF is so that profiling signals do
     149             : not get taken by the new handler - the new handler does not pass on context
     150             : information which causes 'collect' to crash. This is a way of avoiding
     151             : what looks like a bug in the new handler*/
     152             :     { SIGXCPU,   ACT_ABORT,  NULL },    /* exceeded cpu limit */
     153             :     { SIGXFSZ,   ACT_ABORT,  NULL }     /* exceeded file size limit */
     154             : };
     155             : const int NoSignals = sizeof(Signals) / sizeof(struct SignalAction);
     156             : 
     157             : static sal_Bool               bErrorReportingEnabled = sal_True;
     158             : static sal_Bool               bInitSignal = sal_False;
     159             : static oslMutex               SignalListMutex;
     160             : static oslSignalHandlerImpl*  SignalList;
     161             : static sal_Bool               bSetSEGVHandler = sal_False;
     162             : static sal_Bool               bSetWINCHHandler = sal_False;
     163             : static sal_Bool               bSetILLHandler = sal_False;
     164             : 
     165             : static void SignalHandlerFunction(int);
     166             : 
     167           1 : static void getExecutableName_Impl (rtl_String ** ppstrProgName)
     168             : {
     169           1 :     rtl_uString * ustrProgFile = 0;
     170           1 :     osl_getExecutableFile (&ustrProgFile);
     171           1 :     if (ustrProgFile)
     172             :     {
     173           1 :         rtl_uString * ustrProgName = 0;
     174           1 :         osl_systemPathGetFileNameOrLastDirectoryPart (ustrProgFile, &ustrProgName);
     175           1 :         if (ustrProgName != 0)
     176             :         {
     177           2 :             rtl_uString2String (
     178             :                 ppstrProgName,
     179           1 :                 rtl_uString_getStr (ustrProgName), rtl_uString_getLength (ustrProgName),
     180           1 :                 osl_getThreadTextEncoding(),
     181             :                 OUSTRING_TO_OSTRING_CVTFLAGS);
     182           1 :             rtl_uString_release (ustrProgName);
     183             :         }
     184           1 :         rtl_uString_release (ustrProgFile);
     185             :     }
     186           1 : }
     187             : 
     188           1 : static sal_Bool is_soffice_Impl (void)
     189             : {
     190           1 :     sal_Int32    idx       = -1;
     191           1 :     rtl_String * strProgName = 0;
     192             : 
     193           1 :     getExecutableName_Impl (&strProgName);
     194           1 :     if (strProgName)
     195             :     {
     196           1 :         idx = rtl_str_indexOfStr (rtl_string_getStr (strProgName), "soffice");
     197           1 :         rtl_string_release (strProgName);
     198             :     }
     199           1 :     return (idx != -1);
     200             : }
     201             : 
     202           1 : static sal_Bool InitSignal()
     203             : {
     204             :     int i;
     205             :     struct sigaction act;
     206             :     struct sigaction oact;
     207             :     sigset_t unset;
     208             : 
     209           1 :     if (is_soffice_Impl())
     210             :     {
     211             :         // WORKAROUND FOR SEGV HANDLER CONFLICT
     212             :         //
     213             :         // the java jit needs SIGSEGV for proper work
     214             :         // and we need SIGSEGV for the office crashguard
     215             :         //
     216             :         // TEMPORARY SOLUTION:
     217             :         //   the office sets the signal handler during startup
     218             :         //   java can than overwrite it, if needed
     219           1 :         bSetSEGVHandler = sal_True;
     220             : 
     221             :         // WORKAROUND FOR WINCH HANDLER (SEE ABOVE)
     222           1 :         bSetWINCHHandler = sal_True;
     223             : 
     224             :         // WORKAROUND FOR ILLEGAL INSTRUCTION HANDLER (SEE ABOVE)
     225           1 :         bSetILLHandler = sal_True;
     226             :     }
     227             : 
     228             : #ifdef DBG_UTIL
     229             :     bSetSEGVHandler = bSetWINCHHandler = bSetILLHandler = sal_False;
     230             : #endif
     231             : 
     232           1 :     SignalListMutex = osl_createMutex();
     233             : 
     234           1 :     act.sa_handler = SignalHandlerFunction;
     235           1 :     act.sa_flags   = SA_RESTART;
     236             : 
     237           1 :     sigfillset(&(act.sa_mask));
     238             : 
     239             :     /* Initialize the rest of the signals */
     240          31 :     for (i = 0; i < NoSignals; ++i)
     241             :     {
     242             : #if defined HAVE_VALGRIND_HEADERS
     243             :         if (Signals[i].Signal == SIGUSR2 && RUNNING_ON_VALGRIND)
     244             :             Signals[i].Action = ACT_IGNORE;
     245             : #endif
     246             : 
     247             :         /* hack: stomcatd is attaching JavaVM which does not work with an sigaction(SEGV) */
     248          30 :         if ((bSetSEGVHandler || Signals[i].Signal != SIGSEGV)
     249          30 :         && (bSetWINCHHandler || Signals[i].Signal != SIGWINCH)
     250          30 :         && (bSetILLHandler   || Signals[i].Signal != SIGILL))
     251             :         {
     252          30 :             if (Signals[i].Action != ACT_SYSTEM)
     253             :             {
     254          11 :                 if (Signals[i].Action == ACT_HIDE)
     255             :                 {
     256             :                     struct sigaction ign;
     257             : 
     258           2 :                     ign.sa_handler = SIG_IGN;
     259           2 :                     ign.sa_flags   = 0;
     260           2 :                     sigemptyset(&ign.sa_mask);
     261             : 
     262           2 :                     if (sigaction(Signals[i].Signal, &ign, &oact) == 0)
     263           2 :                         Signals[i].Handler = oact.sa_handler;
     264             :                     else
     265           0 :                         Signals[i].Handler = SIG_DFL;
     266             :                 }
     267             :                 else
     268             :                 {
     269           9 :                     if (sigaction(Signals[i].Signal, &act, &oact) == 0)
     270           9 :                         Signals[i].Handler = oact.sa_handler;
     271             :                     else
     272           0 :                         Signals[i].Handler = SIG_DFL;
     273             :                 }
     274             :             }
     275             :         }
     276             :     }
     277             : 
     278             :     /* Clear signal mask inherited from parent process (on Mac OS X, upon a
     279             :        crash soffice re-execs itself from within the signal handler, so the
     280             :        second soffice would have the guilty signal blocked and would freeze upon
     281             :        encountering a similar crash again): */
     282           1 :     if (sigemptyset(&unset) < 0 ||
     283           1 :         pthread_sigmask(SIG_SETMASK, &unset, NULL) < 0)
     284             :     {
     285             :         OSL_TRACE("sigemptyset or pthread_sigmask failed");
     286             :     }
     287             : 
     288           1 :     return sal_True;
     289             : }
     290             : 
     291           1 : static sal_Bool DeInitSignal()
     292             : {
     293             :     int i;
     294             :     struct sigaction act;
     295             : 
     296           1 :     act.sa_flags   = 0;
     297           1 :     sigemptyset(&(act.sa_mask));
     298             : 
     299             :     /* Initialize the rest of the signals */
     300          31 :     for (i = NoSignals - 1; i >= 0; i--)
     301          30 :         if (Signals[i].Action != ACT_SYSTEM)
     302             :         {
     303          11 :             act.sa_handler = Signals[i].Handler;
     304             : 
     305          11 :             sigaction(Signals[i].Signal, &act, NULL);
     306             :         }
     307             : 
     308           1 :     osl_destroyMutex(SignalListMutex);
     309             : 
     310           1 :     return sal_False;
     311             : }
     312             : 
     313             : #if defined (SAL_ENABLE_CRASH_REPORT) && defined(INCLUDE_BACKTRACE)
     314             : 
     315             : static sal_uInt32 calc_md5_checksum( const char *filename, sal_uInt8 *pChecksum, sal_uInt32 nChecksumLen )
     316             : {
     317             :     sal_uInt32  nBytesProcessed = 0;
     318             : 
     319             :     FILE *fp = fopen( filename, "r" );
     320             : 
     321             :     if ( fp )
     322             :     {
     323             :         rtlDigest digest = rtl_digest_createMD5();
     324             : 
     325             :         if ( digest )
     326             :         {
     327             :             size_t          nBytesRead;
     328             :             sal_uInt8       buffer[4096];
     329             :             rtlDigestError  error = rtl_Digest_E_None;
     330             : 
     331             :             while ( rtl_Digest_E_None == error &&
     332             :                 0 != (nBytesRead = fread( buffer, 1, sizeof(buffer), fp )) )
     333             :             {
     334             :                 error = rtl_digest_updateMD5( digest, buffer, nBytesRead );
     335             :                 nBytesProcessed += nBytesRead;
     336             :             }
     337             : 
     338             :             if ( rtl_Digest_E_None == error )
     339             :             {
     340             :                 error = rtl_digest_getMD5( digest, pChecksum, nChecksumLen );
     341             :             }
     342             : 
     343             :             if ( rtl_Digest_E_None != error )
     344             :                 nBytesProcessed = 0;
     345             : 
     346             :             rtl_digest_destroyMD5( digest );
     347             :         }
     348             : 
     349             :         fclose( fp );
     350             :     }
     351             : 
     352             :     return nBytesProcessed;
     353             : }
     354             : 
     355             : /*****************************************************************************/
     356             : /* Call crash reporter  */
     357             : /*****************************************************************************/
     358             : 
     359             : /* Helper function to encode and write a string to a stream */
     360             : 
     361             : static int fputs_xml( const char *string, FILE *stream )
     362             : {
     363             :     int result = 0;
     364             : 
     365             :     while ( result >= 0 && *string )
     366             :     {
     367             :         switch( *string )
     368             :         {
     369             :         case '&':
     370             :             result = fputs( "&amp;", stream );
     371             :             break;
     372             :         case '<':
     373             :             result = fputs( "&lt;", stream );
     374             :             break;
     375             :         case '>':
     376             :             result = fputs( "&gt;", stream );
     377             :             break;
     378             :         default:
     379             :             result = fputc( *string, stream );
     380             :             break;
     381             :         }
     382             : 
     383             :         string++;
     384             :     }
     385             : 
     386             :     return result;
     387             : }
     388             : #endif
     389             : 
     390             : /* Create intermediate files and run crash reporter */
     391             : 
     392             : #if defined SAL_ENABLE_CRASH_REPORT && defined INCLUDE_BACKTRACE && \
     393             :     defined LINUX
     394             : 
     395             : typedef struct
     396             : {
     397             :     const char *name;
     398             :     ElfW(Off) offset;
     399             : } dynamic_entry;
     400             : 
     401             : static int
     402             : callback(struct dl_phdr_info *info, size_t size, void *data)
     403             : {
     404             :     const ElfW(Phdr) *pDynamic = NULL;
     405             : 
     406             :     if (size == sizeof(struct dl_phdr_info))
     407             :     {
     408             :         int i;
     409             :         for (i = 0; i < info->dlpi_phnum; ++i)
     410             :         {
     411             :             if (info->dlpi_phdr[i].p_type == PT_DYNAMIC)
     412             :             {
     413             :                 pDynamic = &(info->dlpi_phdr[i]);
     414             :                 break;
     415             :             }
     416             :         }
     417             :     }
     418             : 
     419             :     if (pDynamic)
     420             :     {
     421             :         char buffer[100];
     422             :         int len;
     423             :         char exe[PATH_MAX];
     424             :         const char *dsoname = info->dlpi_name;
     425             : 
     426             :         dynamic_entry* entry = (dynamic_entry*)data;
     427             : 
     428             :         if (strcmp(dsoname, "") == 0)
     429             :         {
     430             :             snprintf(buffer, sizeof(buffer), "/proc/%d/exe", getpid());
     431             :             if ((len = readlink(buffer, exe, PATH_MAX)) != -1)
     432             :             {
     433             :                 exe[len] = '\0';
     434             :                 dsoname = exe;
     435             :             }
     436             :         }
     437             : 
     438             :         if (strcmp(dsoname, entry->name) == 0)
     439             :         {
     440             :             entry->offset = pDynamic->p_offset;
     441             :             return 1;
     442             :         }
     443             :     }
     444             :     return 0;
     445             : }
     446             : 
     447             : /* Get the location of the .dynamic section offset for the given elf file.
     448             :  * i.e. same as the "Offset" value shown for DYNAMIC from readelf -l foo
     449             :  *
     450             :  * We want to know this value so that if the binaries have been modified
     451             :  * by prelink then we can still process the call stack on server side
     452             :  * by comparing this value to that of an "un-prelinked but known to be
     453             :  * otherwise equivalent" version of those binaries and adjust the call
     454             :  * stack addresses by the differences between .dynamic addresses so as
     455             :  * to be able to map the prelinked addresses back to the unprelinked
     456             :  * addresses
     457             :  *
     458             :  * cmc@openoffice.org
     459             :  */
     460             : static ElfW(Off)
     461             : dynamic_section_offset(const char *name)
     462             : {
     463             :     dynamic_entry entry;
     464             : 
     465             :     entry.name = name;
     466             :     entry.offset = 0;
     467             : 
     468             :     dl_iterate_phdr(callback, &entry);
     469             : 
     470             :     return entry.offset;
     471             : }
     472             : #endif
     473             : 
     474           0 : static int ReportCrash( int Signal )
     475             : {
     476             : #ifdef SAL_ENABLE_CRASH_REPORT
     477             : 
     478             : #define REPORTENV_PARAM     "-crashreportenv:"
     479             : 
     480             :     static sal_Bool bCrashReporterExecuted = sal_False;
     481             :     sal_Bool        bAutoCrashReport = sal_False;
     482             : 
     483             :     sal_uInt32  argi;
     484             :     sal_uInt32  argc;
     485             :     rtl_uString *ustrCommandArg = NULL;
     486             : 
     487             :     if ( !bErrorReportingEnabled )
     488             :         return -1;
     489             : 
     490             :     argc = osl_getCommandArgCount();
     491             : 
     492             :     for ( argi = 0; argi < argc; argi++ )
     493             :     {
     494             :         if ( osl_Process_E_None == osl_getCommandArg( argi, &ustrCommandArg ) )
     495             :         {
     496             :             if ( 0 == rtl_ustr_ascii_compare( rtl_uString_getStr( ustrCommandArg ), "--nocrashreport" ) )
     497             :             {
     498             :                 rtl_uString_release( ustrCommandArg );
     499             :                 return -1;
     500             :             }
     501             :             else if ( 0 == rtl_ustr_ascii_compare( rtl_uString_getStr( ustrCommandArg ), "--autocrashreport" ) )
     502             :             {
     503             :                 bAutoCrashReport = sal_True;
     504             :             }
     505             :             else if ( 0 == rtl_ustr_ascii_shortenedCompare_WithLength(
     506             :                 rtl_uString_getStr( ustrCommandArg ), rtl_uString_getLength( ustrCommandArg ),
     507             :                 REPORTENV_PARAM, strlen(REPORTENV_PARAM) )
     508             :                 )
     509             :             {
     510             :                 rtl_uString *ustrEnvironment = NULL;
     511             :                 rtl_String *strEnv = NULL;
     512             : 
     513             :                 rtl_uString_newFromStr( &ustrEnvironment, rtl_uString_getStr( ustrCommandArg ) + strlen(REPORTENV_PARAM) );
     514             : 
     515             :                 if ( ustrEnvironment )
     516             :                 {
     517             :                     rtl_uString2String(
     518             :                         &strEnv,
     519             :                         rtl_uString_getStr( ustrEnvironment ), rtl_uString_getLength( ustrEnvironment ),
     520             :                         osl_getThreadTextEncoding(), OUSTRING_TO_OSTRING_CVTFLAGS
     521             :                         );
     522             : 
     523             :                     if ( strEnv )
     524             :                     {
     525             :                         putenv( rtl_string_getStr( strEnv ) );
     526             :                         rtl_string_release( strEnv );
     527             :                     }
     528             : 
     529             :                     rtl_uString_release( ustrEnvironment );
     530             :                 }
     531             : 
     532             :             }
     533             : 
     534             :         }
     535             :     }
     536             : 
     537             :     if ( ustrCommandArg )
     538             :         rtl_uString_release( ustrCommandArg );
     539             : 
     540             :     if ( !bCrashReporterExecuted )
     541             :     {
     542             :         int i;
     543             :         /* struct sigaction act; */
     544             : 
     545             :         for (i = 0; i < NoSignals; i++)
     546             :         {
     547             :             if (Signals[i].Signal == Signal && Signals[i].Action == ACT_ABORT )
     548             :             {
     549             :                 int  ret;
     550             :                 char szShellCmd[512] = { '\0' };
     551             :                 char *pXMLTempName = NULL;
     552             :                 char *pStackTempName = NULL;
     553             :                 char *pChecksumTempName = NULL;
     554             : 
     555             : #ifdef INCLUDE_BACKTRACE
     556             :                 char szXMLTempNameBuffer[L_tmpnam];
     557             :                 char szChecksumTempNameBuffer[L_tmpnam];
     558             :                 char szStackTempNameBuffer[L_tmpnam];
     559             : 
     560             :                 void *stackframes[MAX_STACK_FRAMES];
     561             :                 int  iFrame;
     562             :                 int  nFrames = backtrace( stackframes, SAL_N_ELEMENTS(stackframes) );
     563             : 
     564             :                 FILE *xmlout = NULL, *stackout = NULL, *checksumout = NULL;
     565             :                 int fdxml, fdstk, fdchksum;
     566             : 
     567             :                 strncpy( szXMLTempNameBuffer, P_tmpdir, sizeof(szXMLTempNameBuffer) );
     568             :                 strncat( szXMLTempNameBuffer, "/crxmlXXXXXX", sizeof(szXMLTempNameBuffer) - strlen(szXMLTempNameBuffer) - 1 );
     569             : 
     570             :                 strncpy( szStackTempNameBuffer, P_tmpdir, sizeof(szStackTempNameBuffer) );
     571             :                 strncat( szStackTempNameBuffer, "/crstkXXXXXX", sizeof(szStackTempNameBuffer) - strlen(szStackTempNameBuffer) - 1 );
     572             : 
     573             :                 strncpy( szChecksumTempNameBuffer, P_tmpdir, sizeof(szChecksumTempNameBuffer) );
     574             :                 strncat( szChecksumTempNameBuffer, "/crchkXXXXXX", sizeof(szChecksumTempNameBuffer) - strlen(szChecksumTempNameBuffer) - 1 );
     575             : 
     576             :                 fdxml = mkstemp(szXMLTempNameBuffer);
     577             :                 fdstk = mkstemp(szStackTempNameBuffer);
     578             :                 fdchksum = mkstemp(szChecksumTempNameBuffer);
     579             : 
     580             :                 xmlout = fdopen( fdxml , "w" );
     581             :                 stackout = fdopen( fdstk , "w" );
     582             :                 checksumout = fdopen( fdchksum, "w" );
     583             : 
     584             :                 pXMLTempName = szXMLTempNameBuffer;
     585             :                 pStackTempName = szStackTempNameBuffer;
     586             :                 pChecksumTempName = szChecksumTempNameBuffer;
     587             : 
     588             :                 if ( xmlout && stackout && checksumout )
     589             :                 {
     590             :                     fprintf( xmlout, "<errormail:Stack type=\"%s\">\n", STACKTYPE );
     591             : 
     592             :                     fprintf( checksumout, "<errormail:Checksums type=\"MD5\">\n" );
     593             : 
     594             :                     for ( iFrame = 0; iFrame < nFrames; iFrame++ )
     595             :                     {
     596             :                         Dl_info dl_info;
     597             : 
     598             :                         fprintf( stackout, "0x%" SAL_PRIxUINTPTR ":",
     599             :                             SAL_INT_CAST(sal_uIntPtr, stackframes[iFrame]) );
     600             : 
     601             :                         fprintf( xmlout, "<errormail:StackInfo pos=\"%d\" ip=\"0x%" SAL_PRIxUINTPTR "\"",
     602             :                             iFrame,
     603             :                             SAL_INT_CAST(sal_uIntPtr, stackframes[iFrame])
     604             :                             );
     605             : 
     606             :                         memset( &dl_info, 0, sizeof(dl_info) );
     607             : 
     608             :                         /* dladdr may fail */
     609             :                         if ( dladdr( stackframes[iFrame], &dl_info) )
     610             :                         {
     611             :                             const char *dli_fname = NULL;
     612             :                             char *dli_fdir = NULL;
     613             :                             char szDirectory[PATH_MAX];
     614             :                             char szCanonicDirectory[PATH_MAX];
     615             : 
     616             :                             /* Don't expect that dladdr filled all members of dl_info */
     617             : 
     618             :                             dli_fname = dl_info.dli_fname ? strrchr(  dl_info.dli_fname, '/' ) : NULL;
     619             :                             if ( dli_fname )
     620             :                             {
     621             :                                 ++dli_fname;
     622             :                                 memcpy( szDirectory, dl_info.dli_fname, dli_fname - dl_info.dli_fname );
     623             :                                 szDirectory[dli_fname - dl_info.dli_fname] = 0;
     624             : 
     625             :                                 dli_fdir = realpath( szDirectory, szCanonicDirectory ) ? szCanonicDirectory : szDirectory;
     626             : 
     627             :                                 if ( *dli_fdir && dli_fdir[ strlen(dli_fdir) - 1 ] != '/' )
     628             :                                     strcat( dli_fdir, "/" );
     629             :                             }
     630             :                             else
     631             :                                 dli_fname = dl_info.dli_fname;
     632             : 
     633             :                             /* create checksum of library on stack */
     634             :                             if ( dli_fname )
     635             :                             {
     636             :                                 sal_uInt8   checksum[RTL_DIGEST_LENGTH_MD5];
     637             : 
     638             :                                 sal_uInt32 nBytesProcessed = calc_md5_checksum(
     639             :                                     dl_info.dli_fname, checksum, sizeof(checksum) );
     640             :                                 if ( nBytesProcessed )
     641             :                                 {
     642             :                                     int j;
     643             : 
     644             :                                     fprintf( checksumout, "<errormail:Checksum sum=\"0x" );
     645             :                                     for ( j = 0; j < 16; fprintf( checksumout, "%02X", checksum[j++] ) );
     646             :                                     fprintf( checksumout,
     647             :                                         "\" bytes=\"%lu\" file=\"%s\"/>\n",
     648             :                                         SAL_INT_CAST(
     649             :                                             unsigned long, nBytesProcessed),
     650             :                                         dli_fname );
     651             :                                 }
     652             :                             }
     653             : 
     654             :                             if ( dl_info.dli_fbase && dl_info.dli_fname )
     655             :                             {
     656             : #ifdef LINUX
     657             :                                 ElfW(Off) dynamic_offset = dynamic_section_offset(dl_info.dli_fname);
     658             :                                 fprintf( stackout, " 0x%" SAL_PRI_SIZET "x:", dynamic_offset);
     659             : #endif
     660             : 
     661             :                                 fprintf( stackout, " %s + 0x%" SAL_PRI_PTRDIFFT "x",
     662             :                                     dl_info.dli_fname,
     663             :                                     (char*)stackframes[iFrame] - (char*)dl_info.dli_fbase
     664             :                                     );
     665             : 
     666             :                                 fprintf( xmlout, " rel=\"0x%" SAL_PRI_PTRDIFFT "x\"", (char *)stackframes[iFrame] - (char *)dl_info.dli_fbase );
     667             :                                 if ( dli_fname )
     668             :                                     fprintf( xmlout, " name=\"%s\"", dli_fname );
     669             : 
     670             :                                 if ( dli_fdir )
     671             :                                     fprintf( xmlout, " path=\"%s\"", dli_fdir );
     672             : 
     673             : #ifdef LINUX
     674             :                                 fprintf( xmlout, " dynamicoffset=\"0x%" SAL_PRI_SIZET "x\"", dynamic_offset );
     675             : #endif
     676             :                             }
     677             :                             else
     678             :                                 fprintf( stackout, " ????????" );
     679             : 
     680             :                             if ( dl_info.dli_sname && dl_info.dli_saddr )
     681             :                             {
     682             :                                 fputs( " (", stackout );
     683             :                                 fputs_xml( dl_info.dli_sname, stackout );
     684             :                                 fprintf( stackout, " + 0x%" SAL_PRI_PTRDIFFT "x)",
     685             :                                     (char*)stackframes[iFrame] - (char*)dl_info.dli_saddr );
     686             : 
     687             :                                 fputs( " ordinal=\"", xmlout );
     688             :                                 fputs_xml( dl_info.dli_sname, xmlout );
     689             :                                 fprintf( xmlout, "+0x%" SAL_PRI_PTRDIFFT "x\"",
     690             :                                     (char *)stackframes[iFrame] - (char *)dl_info.dli_saddr );
     691             :                             }
     692             : 
     693             :                         }
     694             :                         else /* dladdr failed */
     695             :                         {
     696             :                             fprintf( stackout, " ????????" );
     697             :                         }
     698             : 
     699             :                         fprintf( stackout, "\n" );
     700             :                         fprintf( xmlout, "/>\n" );
     701             : 
     702             :                     }
     703             : 
     704             :                     fprintf( xmlout, "</errormail:Stack>\n" );
     705             :                     fprintf( checksumout, "</errormail:Checksums>\n" );
     706             :                 }
     707             :                 else
     708             :                 {
     709             :                     pXMLTempName = NULL;
     710             :                     pStackTempName = NULL;
     711             :                     pChecksumTempName = NULL;
     712             :                 }
     713             : 
     714             :                 if ( stackout )
     715             :                     fclose( stackout );
     716             :                 if ( xmlout )
     717             :                     fclose( xmlout );
     718             :                 if ( checksumout )
     719             :                     fclose( checksumout );
     720             : 
     721             :                 if ( pXMLTempName && pChecksumTempName && pStackTempName )
     722             : #endif /* INCLUDE_BACKTRACE */
     723             :                 {
     724             :                     rtl_uString * crashrep_url = NULL;
     725             :                     rtl_uString * crashrep_path = NULL;
     726             :                     rtl_String  * crashrep_path_system = NULL;
     727             :                     rtl_string2UString(
     728             :                         &crashrep_url,
     729             :                         RTL_CONSTASCII_USTRINGPARAM(
     730             :                             "$BRAND_BASE_DIR/program/crashrep"),
     731             :                         OSTRING_TO_OUSTRING_CVTFLAGS);
     732             :                     rtl_bootstrap_expandMacros(&crashrep_url);
     733             :                     osl_getSystemPathFromFileURL(crashrep_url, &crashrep_path);
     734             :                     rtl_uString2String(
     735             :                         &crashrep_path_system,
     736             :                         rtl_uString_getStr(crashrep_path),
     737             :                         rtl_uString_getLength(crashrep_path),
     738             :                         osl_getThreadTextEncoding(),
     739             :                         (RTL_UNICODETOTEXT_FLAGS_UNDEFINED_ERROR
     740             :                          | RTL_UNICODETOTEXT_FLAGS_INVALID_ERROR));
     741             :                     rtl_uString_release(crashrep_url);
     742             :                     rtl_uString_release(crashrep_path);
     743             : #if defined INCLUDE_BACKTRACE && (defined LINUX || defined MACOSX)
     744             :                     snprintf( szShellCmd, SAL_N_ELEMENTS(szShellCmd),
     745             :                         "%s -p %d -s %d -xml %s -chksum %s -stack %s -noui%s",
     746             :                         rtl_string_getStr(crashrep_path_system),
     747             :                         getpid(),
     748             :                         Signal,
     749             :                         pXMLTempName,
     750             :                         pChecksumTempName,
     751             :                         pStackTempName,
     752             :                         bAutoCrashReport ? " -send" : "" );
     753             : #elif defined INCLUDE_BACKTRACE && defined SOLARIS
     754             :                     snprintf( szShellCmd, SAL_N_ELEMENTS(szShellCmd),
     755             :                         "%s -p %d -s %d -xml %s -chksum %s -noui%s",
     756             :                         rtl_string_getStr(crashrep_path_system),
     757             :                         getpid(),
     758             :                         Signal,
     759             :                         pXMLTempName,
     760             :                         pChecksumTempName,
     761             :                         bAutoCrashReport ? " -send" : "" );
     762             : #else
     763             :                     snprintf( szShellCmd, SAL_N_ELEMENTS(szShellCmd),
     764             :                         "%s -p %d -s %d -noui%s",
     765             :                         rtl_string_getStr(crashrep_path_system),
     766             :                         getpid(), Signal, bAutoCrashReport ? " -send" : "" );
     767             : #endif
     768             :                     rtl_string_release(crashrep_path_system);
     769             :                 }
     770             : 
     771             :                 ret = szShellCmd[0] == '\0' ? -1 : system( szShellCmd );
     772             : 
     773             :                 if ( pXMLTempName )
     774             :                     unlink( pXMLTempName );
     775             : 
     776             :                 if ( pStackTempName )
     777             :                     unlink( pStackTempName );
     778             : 
     779             :                 if ( pChecksumTempName )
     780             :                     unlink( pChecksumTempName );
     781             : 
     782             :                 if ( -1 != ret )
     783             :                 {
     784             :                     bCrashReporterExecuted = sal_True;
     785             :                     return 1;
     786             :                 }
     787             :                 else
     788             :                     return -1;
     789             : 
     790             :             }
     791             :         }
     792             : 
     793             :         return 0;
     794             :     }
     795             : 
     796             :     return 1;
     797             : #else /* defined SAL_ENABLE_CRASH_REPORT */
     798             :     /* the utility crash_report is not build, so do the same as when
     799             :        the option -nocrashreport is used */
     800             :     (void) Signal; // avoid warnings
     801           0 :     return -1;
     802             : #endif /* defined SAL_ENABLE_CRASH_REPORT */
     803             : }
     804             : 
     805           0 : static void PrintStack( int sig )
     806             : {
     807             : #ifdef INCLUDE_BACKTRACE
     808             :     void *buffer[MAX_STACK_FRAMES];
     809           0 :     int size = backtrace( buffer, SAL_N_ELEMENTS(buffer) );
     810             : #endif
     811             : 
     812           0 :     fprintf( stderr, "\n\nFatal exception: Signal %d\n", sig );
     813             : 
     814             : #if defined( MACOSX ) && !defined( INCLUDE_BACKTRACE )
     815             :     fprintf( stderr, "Please turn on Enable Crash Reporting and\nAutomatic Display of Crashlogs in the Console application\n" );
     816             : #else
     817             : #ifdef INCLUDE_BACKTRACE
     818           0 :     if ( size > 0 )
     819             :     {
     820           0 :         fputs( "Stack:\n", stderr );
     821           0 :         backtrace_symbols_fd( buffer, size, fileno(stderr) );
     822             :     }
     823             : #endif
     824             : #endif
     825           0 : }
     826             : 
     827           0 : static oslSignalAction CallSignalHandler(oslSignalInfo *pInfo)
     828             : {
     829           0 :     oslSignalHandlerImpl* pHandler = SignalList;
     830           0 :     oslSignalAction Action = osl_Signal_ActCallNextHdl;
     831             : 
     832           0 :     while (pHandler != NULL)
     833             :     {
     834           0 :         if ((Action = pHandler->Handler(pHandler->pData, pInfo))
     835             :             != osl_Signal_ActCallNextHdl)
     836           0 :             break;
     837             : 
     838           0 :         pHandler = pHandler->pNext;
     839             :     }
     840             : 
     841           0 :     return Action;
     842             : }
     843             : 
     844           0 : void CallSystemHandler(int Signal)
     845             : {
     846             :     int i;
     847             :     struct sigaction act;
     848             : 
     849           0 :     for (i = 0; i < NoSignals; i++)
     850             :     {
     851           0 :         if (Signals[i].Signal == Signal)
     852           0 :             break;
     853             :     }
     854             : 
     855           0 :     if (i < NoSignals)
     856             :     {
     857           0 :         if ((Signals[i].Handler == NULL)    ||
     858           0 :             (Signals[i].Handler == SIG_DFL) ||
     859           0 :             (Signals[i].Handler == SIG_IGN) ||
     860           0 :              (Signals[i].Handler == SIG_ERR))
     861             :         {
     862           0 :             switch (Signals[i].Action)
     863             :             {
     864             :                 case ACT_EXIT:      /* terminate */
     865             :                     /* prevent dumping core on exit() */
     866           0 :                     _exit(255);
     867             :                     break;
     868             : 
     869             :                 case ACT_ABORT:     /* terminate witch core dump */
     870           0 :                     ReportCrash( Signal );
     871           0 :                     act.sa_handler = SIG_DFL;
     872           0 :                     act.sa_flags   = 0;
     873           0 :                     sigemptyset(&(act.sa_mask));
     874           0 :                     sigaction(SIGABRT, &act, NULL);
     875           0 :                     PrintStack( Signal );
     876           0 :                     abort();
     877             :                     break;
     878             : 
     879             :                 case ACT_IGNORE:    /* ignore */
     880           0 :                     break;
     881             : 
     882             :                 default:            /* should never happen */
     883             :                     OSL_ASSERT(0);
     884             :             }
     885           0 :         }
     886             :         else
     887           0 :             (*Signals[i].Handler)(Signal);
     888             :     }
     889           0 : }
     890             : 
     891             : #if defined HAVE_VALGRIND_HEADERS
     892             : static void DUMPCURRENTALLOCS()
     893             : {
     894             :     VALGRIND_PRINTF( "=== start memcheck dump of active allocations ===\n" );
     895             : 
     896             : #if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6))
     897             : #   pragma GCC diagnostic push
     898             : #   pragma GCC diagnostic ignored "-Wunused-but-set-variable"
     899             : #endif
     900             : 
     901             :     VALGRIND_DO_LEAK_CHECK;
     902             : 
     903             : #if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6))
     904             : #   pragma GCC diagnostic pop
     905             : #endif
     906             : 
     907             :     VALGRIND_PRINTF( "=== end memcheck dump of active allocations ===\n" );
     908             : }
     909             : #endif
     910             : 
     911           0 : void SignalHandlerFunction(int Signal)
     912             : {
     913             :     oslSignalInfo    Info;
     914             :     struct sigaction act;
     915             : 
     916           0 :     Info.UserSignal = Signal;
     917           0 :     Info.UserData   = NULL;
     918             : 
     919           0 :     switch (Signal)
     920             :     {
     921             :         case SIGBUS:
     922             :         case SIGILL:
     923             :         case SIGSEGV:
     924             :         case SIGIOT:
     925             : #if ( SIGIOT != SIGABRT )
     926             :         case SIGABRT:
     927             : #endif
     928           0 :             Info.Signal = osl_Signal_AccessViolation;
     929           0 :             break;
     930             : 
     931             :         case -1:
     932           0 :             Info.Signal = osl_Signal_IntegerDivideByZero;
     933           0 :             break;
     934             : 
     935             :         case SIGFPE:
     936           0 :             Info.Signal = osl_Signal_FloatDivideByZero;
     937           0 :             break;
     938             : 
     939             :         case SIGINT:
     940             :         case SIGTERM:
     941             :         case SIGQUIT:
     942           0 :             Info.Signal = osl_Signal_Terminate;
     943           0 :             break;
     944             : 
     945             : #if defined HAVE_VALGRIND_HEADERS
     946             :         case SIGUSR2:
     947             :             if (RUNNING_ON_VALGRIND)
     948             :                 DUMPCURRENTALLOCS();
     949             :             Info.Signal = osl_Signal_System;
     950             :             break;
     951             : #endif
     952             : 
     953             :         default:
     954           0 :             Info.Signal = osl_Signal_System;
     955           0 :             break;
     956             :     }
     957             : 
     958           0 :     ReportCrash( Signal );
     959             : 
     960           0 :     switch (CallSignalHandler(&Info))
     961             :     {
     962             :     case osl_Signal_ActCallNextHdl:
     963           0 :         CallSystemHandler(Signal);
     964           0 :         break;
     965             : 
     966             :     case osl_Signal_ActAbortApp:
     967           0 :         ReportCrash( Signal );
     968           0 :         act.sa_handler = SIG_DFL;
     969           0 :         act.sa_flags   = 0;
     970           0 :         sigemptyset(&(act.sa_mask));
     971           0 :         sigaction(SIGABRT, &act, NULL);
     972           0 :         PrintStack( Signal );
     973           0 :         abort();
     974             :         break;
     975             : 
     976             :     case osl_Signal_ActKillApp:
     977             :         /* prevent dumping core on exit() */
     978           0 :         _exit(255);
     979             :         break;
     980             :     default:
     981           0 :         break;
     982             :     }
     983           0 : }
     984             : 
     985           2 : oslSignalHandler SAL_CALL osl_addSignalHandler(oslSignalHandlerFunction Handler, void* pData)
     986             : {
     987             :     oslSignalHandlerImpl* pHandler;
     988             : 
     989             :     OSL_ASSERT(Handler != NULL);
     990           2 :     if ( Handler == 0 )
     991             :     {
     992           0 :         return 0;
     993             :     }
     994             : 
     995           2 :     if (! bInitSignal)
     996           1 :         bInitSignal = InitSignal();
     997             : 
     998           2 :     pHandler = (oslSignalHandlerImpl*) calloc(1, sizeof(oslSignalHandlerImpl));
     999             : 
    1000           2 :     if (pHandler != NULL)
    1001             :     {
    1002           2 :         pHandler->Handler = Handler;
    1003           2 :         pHandler->pData   = pData;
    1004             : 
    1005           2 :         osl_acquireMutex(SignalListMutex);
    1006             : 
    1007           2 :         pHandler->pNext = SignalList;
    1008           2 :         SignalList      = pHandler;
    1009             : 
    1010           2 :         osl_releaseMutex(SignalListMutex);
    1011             : 
    1012           2 :         return (pHandler);
    1013             :     }
    1014             : 
    1015           0 :     return (NULL);
    1016             : }
    1017             : 
    1018           2 : sal_Bool SAL_CALL osl_removeSignalHandler(oslSignalHandler Handler)
    1019             : {
    1020           2 :     oslSignalHandlerImpl *pHandler, *pPrevious = NULL;
    1021             : 
    1022             :     OSL_ASSERT(Handler != NULL);
    1023             : 
    1024           2 :     if (! bInitSignal)
    1025           0 :         bInitSignal = InitSignal();
    1026             : 
    1027           2 :     osl_acquireMutex(SignalListMutex);
    1028             : 
    1029           2 :     pHandler = SignalList;
    1030             : 
    1031           4 :     while (pHandler != NULL)
    1032             :     {
    1033           2 :         if (pHandler == Handler)
    1034             :         {
    1035           2 :             if (pPrevious)
    1036           0 :                 pPrevious->pNext = pHandler->pNext;
    1037             :             else
    1038           2 :                 SignalList = pHandler->pNext;
    1039             : 
    1040           2 :             osl_releaseMutex(SignalListMutex);
    1041             : 
    1042           2 :             if (SignalList == NULL)
    1043           1 :                 bInitSignal = DeInitSignal();
    1044             : 
    1045           2 :             free(pHandler);
    1046             : 
    1047           2 :             return (sal_True);
    1048             :         }
    1049             : 
    1050           0 :         pPrevious = pHandler;
    1051           0 :         pHandler  = pHandler->pNext;
    1052             :     }
    1053             : 
    1054           0 :     osl_releaseMutex(SignalListMutex);
    1055             : 
    1056           0 :     return (sal_False);
    1057             : }
    1058             : 
    1059           0 : oslSignalAction SAL_CALL osl_raiseSignal(sal_Int32 UserSignal, void* UserData)
    1060             : {
    1061             :     oslSignalInfo   Info;
    1062             :     oslSignalAction Action;
    1063             : 
    1064           0 :     if (! bInitSignal)
    1065           0 :         bInitSignal = InitSignal();
    1066             : 
    1067           0 :     osl_acquireMutex(SignalListMutex);
    1068             : 
    1069           0 :     Info.Signal     = osl_Signal_User;
    1070           0 :     Info.UserSignal = UserSignal;
    1071           0 :     Info.UserData   = UserData;
    1072             : 
    1073           0 :     Action = CallSignalHandler(&Info);
    1074             : 
    1075           0 :     osl_releaseMutex(SignalListMutex);
    1076             : 
    1077           0 :     return (Action);
    1078             : }
    1079             : 
    1080           0 : sal_Bool SAL_CALL osl_setErrorReporting( sal_Bool bEnable )
    1081             : {
    1082           0 :     sal_Bool bOld = bErrorReportingEnabled;
    1083           0 :     bErrorReportingEnabled = bEnable;
    1084             : 
    1085           0 :     return bOld;
    1086             : }
    1087             : 
    1088             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

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