main/bsod.cpp

   1 #include <string.h>
   2 #include <signal.h>
   3 #include <asm/ptrace.h>
   4
   5 #include <lib/base/eerror.h>
   6 #include <lib/base/smartptr.h>
   7 #include <lib/gdi/grc.h>
   8 #include <lib/gdi/gfbdc.h>
   9
  10 #include "version.h"
  11
  12 /************************************************/
  13
  14 #define CRASH_EMAILADDR "crashlog@dream-multimedia-tv.de"
  15
  16 #define RINGBUFFER_SIZE 16384
  17 static char ringbuffer[RINGBUFFER_SIZE];
  18 static int ringbuffer_head;
  19
  20 static void addToLogbuffer(const char *data, int len)
  21 {
  22         while (len)
  23         {
  24                 int remaining = RINGBUFFER_SIZE - ringbuffer_head;
  25
  26                 if (remaining > len)
  27                         remaining = len;
  28
  29                 memcpy(ringbuffer + ringbuffer_head, data, remaining);
  30                 len -= remaining;
  31                 data += remaining;
  32                 ringbuffer_head += remaining;
  33                 if (ringbuffer_head >= RINGBUFFER_SIZE)
  34                         ringbuffer_head = 0;
  35         }
  36 }
  37
  38 static std::string getLogBuffer()
  39 {
  40         int begin = ringbuffer_head;
  41         while (ringbuffer[begin] == 0)
  42         {
  43                 ++begin;
  44                 if (begin == RINGBUFFER_SIZE)
  45                         begin = 0;
  46                 if (begin == ringbuffer_head)
  47                         return "";
  48         }
  49         if (begin < ringbuffer_head)
  50                 return std::string(ringbuffer + begin, ringbuffer_head - begin);
  51         else
  52         {
  53                 return std::string(ringbuffer + begin, RINGBUFFER_SIZE - begin) + std::string(ringbuffer, ringbuffer_head);
  54         }
  55 }
  56
  57 static void addToLogbuffer(int level, const std::string &log)
  58 {
  59         addToLogbuffer(log.c_str(), log.size());
  60 }
  61
  62
  63 extern std::string getLogBuffer();
  64
  65 void bsodFatal()
  66 {
  67         char logfile[128];
  68         sprintf(logfile, "/media/hdd/enigma2_crash_%u.log", (unsigned int)time(0));
  69         FILE *f = fopen(logfile, "wb");
  70
  71         std::string lines = getLogBuffer();
  72
  73         if (f)
  74         {
  75                 time_t t = time(0);
  76                 fprintf(f, "enigma2 crashed on %s", ctime(&t));
  77 #ifdef ENIGMA2_CHECKOUT_TAG
  78                 fprintf(f, "enigma2 CVS TAG: " ENIGMA2_CHECKOUT_TAG "\n");
  79 #else
  80                 fprintf(f, "enigma2 compiled on " __DATE__ "\n");
  81 #endif
  82 #ifdef ENIGMA2_CHECKOUT_ROOT
  83                 fprintf(f, "enigma2 checked out from " ENIGMA2_CHECKOUT_ROOT "\n");
  84 #endif
  85                 fprintf(f, "please email this file to " CRASH_EMAILADDR "\n");
  86                 std::string buffer = getLogBuffer();
  87                 fwrite(buffer.c_str(), buffer.size(), 1, f);
  88                 fclose(f);
  89
  90                 char cmd[256];
  91                 sprintf(cmd, "find /usr/lib/enigma2/python/ -name \"*.py\" | xargs md5sum >> %s", logfile);
  92                 system(cmd);
  93         }
  94
  95         ePtr<gFBDC> my_dc;
  96         gFBDC::getInstance(my_dc);
  97
  98         {
  99                 gPainter p(my_dc);
 100                 p.resetOffset();
 101                 p.resetClip(eRect(ePoint(0, 0), my_dc->size()));
 102                 p.setBackgroundColor(gRGB(0x0000C0));
 103                 p.setForegroundColor(gRGB(0xFFFFFF));
 104
 105                 ePtr<gFont> font = new gFont("Regular", 20);
 106                 p.setFont(font);
 107                 p.clear();
 108
 109                 eRect usable_area = eRect(100, 70, my_dc->size().width() - 150, 100);
 110
 111                 p.renderText(usable_area,
 112                         "We are really sorry. Something happened "
 113                         "which should not have happened, and "
 114                         "resulted in a crash. If you want to help "
 115                         "us in improving this situation, please send "
 116                         "the logfile created in /hdd/ to " CRASH_EMAILADDR "."
 117                         "Your receiver restarts in 10 seconds !", gPainter::RT_WRAP|gPainter::RT_HALIGN_LEFT);
 118
 119                 usable_area = eRect(100, 170, my_dc->size().width() - 180, my_dc->size().height() - 20);
 120
 121                 int i;
 122
 123                 size_t start = std::string::npos + 1;
 124                 for (i=0; i<20; ++i)
 125                 {
 126                         start = lines.rfind('\n', start - 1);
 127                         if (start == std::string::npos)
 128                         {
 129                                 start = 0;
 130                                 break;
 131                         }
 132                 }
 133
 134                 font = new gFont("Regular", 14);
 135                 p.setFont(font);
 136
 137                 p.renderText(usable_area,
 138                         lines.substr(start), gPainter::RT_HALIGN_LEFT);
 139                 p.flush();
 140                 sleep(10);
 141         }
 142
 143         raise(SIGKILL);
 144 }
 145
 146 #if defined(__MIPSEL__)
 147 void oops(const mcontext_t &context, int dumpcode)
 148 {
 149         eDebug("PC: %08lx, vaddr: %08lx", (unsigned long)context.pc, (unsigned long)context.badvaddr);
 150         int i;
 151         for (i=0; i<32; ++i)
 152         {
 153                 eDebugNoNewLine(" %08x", (int)context.gregs[i]);
 154                 if ((i&3) == 3)
 155                         eDebug("");
 156         }
 157                 /* this is temporary debug stuff. */
 158         if (dumpcode && ((unsigned long)context.pc) > 0x10000) /* not a zero pointer */
 159         {
 160                 eDebug("As a final action, i will try to dump a bit of code.");
 161                 eDebug("I just hope that this won't crash.");
 162                 int i;
 163                 eDebugNoNewLine("%08lx:", (unsigned long)context.pc);
 164                 for (i=0; i<0x20; ++i)
 165                         eDebugNoNewLine(" %02x", ((unsigned char*)context.pc)[i]);
 166                 eDebug(" (end)");
 167         }
 168 }
 169 #else
 170 #warning "no oops support!"
 171 #define NO_OOPS_SUPPORT
 172 #endif
 173
 174 void handleFatalSignal(int signum, siginfo_t *si, void *ctx)
 175 {
 176         ucontext_t *uc = (ucontext_t*)ctx;
 177         eDebug("KILLED BY signal %d", signum);
 178 #ifndef NO_OOPS_SUPPORT
 179         oops(uc->uc_mcontext, signum == SIGSEGV || signum == SIGABRT);
 180 #endif
 181         eDebug("-------");
 182         bsodFatal();
 183 }
 184
 185 void bsodCatchSignals()
 186 {
 187         struct sigaction act;
 188         act.sa_handler = SIG_DFL;
 189         act.sa_sigaction = handleFatalSignal;
 190         act.sa_flags = SA_RESTART | SA_SIGINFO;
 191         if (sigemptyset(&act.sa_mask) == -1)
 192                 perror("sigemptyset");
 193
 194                 /* start handling segfaults etc. */
 195         sigaction(SIGSEGV, &act, 0);
 196         sigaction(SIGILL, &act, 0);
 197         sigaction(SIGBUS, &act, 0);
 198         sigaction(SIGABRT, &act, 0);
 199 }
 200
 201 void bsodLogInit()
 202 {
 203         logOutput.connect(addToLogbuffer);
 204 }