spielwiese
Last change
on this file since 0338ae9 was
75f460,
checked in by Hans Schoenemann <hannes@…>, 9 years ago
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File size:
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1 | /******************************************************************* |
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2 | * File: omGetBackTrace.c |
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3 | * Purpose: routines for getting Backtraces of stack |
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4 | * Author: obachman (Olaf Bachmann) |
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5 | * Created: 11/99 |
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6 | *******************************************************************/ |
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7 | #ifndef OM_NDEBUG |
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8 | |
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9 | #if __GNUC__ > 1 |
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10 | |
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11 | static void* om_this_main_frame_addr = 0; |
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12 | |
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13 | void omInitGetBackTrace() |
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14 | { |
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15 | if (__builtin_frame_address(0) != 0 && |
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16 | __builtin_frame_address(1) > __builtin_frame_address(0)) |
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17 | om_this_main_frame_addr = __builtin_frame_address(1); |
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18 | } |
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19 | |
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20 | #define OM_GET_BACK_TRACE(j) \ |
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21 | case j: \ |
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22 | { \ |
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23 | f_addr = __builtin_frame_address(j); \ |
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24 | if (f_addr > this_frame && f_addr < om_this_main_frame_addr) \ |
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25 | { \ |
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26 | r_addr = __builtin_return_address(j); \ |
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27 | if (r_addr) \ |
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28 | { \ |
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29 | bt[i] = r_addr; \ |
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30 | i++; \ |
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31 | if (i >= max) break; \ |
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32 | } \ |
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33 | else break; \ |
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34 | } \ |
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35 | else break; \ |
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36 | } |
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37 | |
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38 | int omGetBackTrace(void** bt, int start, int max) |
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39 | { |
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40 | int i = 0; |
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41 | void* this_frame = __builtin_frame_address(0); |
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42 | void* f_addr; |
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43 | void* r_addr; |
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44 | |
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45 | start++; |
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46 | |
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47 | switch(start) |
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48 | { |
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49 | OM_GET_BACK_TRACE(1) |
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50 | OM_GET_BACK_TRACE(2) |
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51 | /* the following fails on Mac OsX, but the debugging |
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52 | * support it provides is too useful to disable it |
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53 | */ |
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54 | #ifdef __linux |
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55 | #if defined(__x86_64) || defined(__i386) |
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56 | OM_GET_BACK_TRACE(3) |
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57 | OM_GET_BACK_TRACE(4) |
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58 | OM_GET_BACK_TRACE(5) |
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59 | OM_GET_BACK_TRACE(6) |
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60 | OM_GET_BACK_TRACE(7) |
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61 | OM_GET_BACK_TRACE(8) |
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62 | OM_GET_BACK_TRACE(9) |
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63 | OM_GET_BACK_TRACE(10) |
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64 | OM_GET_BACK_TRACE(11) |
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65 | OM_GET_BACK_TRACE(12) |
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66 | OM_GET_BACK_TRACE(13) |
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67 | OM_GET_BACK_TRACE(14) |
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68 | OM_GET_BACK_TRACE(15) |
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69 | OM_GET_BACK_TRACE(16) |
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70 | OM_GET_BACK_TRACE(17) |
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71 | #endif |
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72 | #endif |
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73 | } |
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74 | if (i < max) bt[i] = 0; |
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75 | return i; |
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76 | } |
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77 | |
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78 | #endif /* __GNUC__ > 1 */ |
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79 | |
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80 | #endif /* ! OM_NDEBUG */ |
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