1 | // ============================================================== // |
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2 | // // |
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3 | // File : arb_backtrace.h // |
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4 | // Purpose : // |
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5 | // // |
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6 | // Coded by Ralf Westram (coder@reallysoft.de) in August 2010 // |
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7 | // Institute of Microbiology (Technical University Munich) // |
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8 | // http://www.arb-home.de/ // |
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9 | // // |
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10 | // ============================================================== // |
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11 | |
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12 | #ifndef ARB_BACKTRACE_H |
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13 | #define ARB_BACKTRACE_H |
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14 | |
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15 | #define MAX_BACKTRACE 66 |
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16 | |
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17 | #ifndef _GLIBCXX_CSTDLIB |
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18 | #include <cstdlib> |
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19 | #endif |
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20 | #ifndef _GLIBCXX_CSTDIO |
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21 | #include <cstdio> |
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22 | #endif |
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23 | #ifndef _EXECINFO_H |
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24 | #include <execinfo.h> |
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25 | #endif |
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26 | #ifndef ARB_ASSERT_H |
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27 | #include <arb_assert.h> |
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28 | #endif |
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29 | #ifndef ARBTOOLS_H |
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30 | #include "arbtools.h" |
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31 | #endif |
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32 | |
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33 | #define ARB_CRASH_CODE(sig) (128+(sig)) |
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34 | |
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35 | class BackTraceInfo : virtual Noncopyable { |
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36 | void **array; |
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37 | size_t size; |
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38 | |
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39 | public: |
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40 | |
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41 | static bool& suppress() { |
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42 | static bool suppress_ = false; |
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43 | return suppress_; |
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44 | } |
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45 | |
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46 | explicit BackTraceInfo(size_t skipFramesAtBottom) { |
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47 | void *tmp[MAX_BACKTRACE]; |
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48 | size = backtrace(tmp, MAX_BACKTRACE); |
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49 | |
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50 | size_t wantedFrames = size-skipFramesAtBottom; |
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51 | |
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52 | arb_assert(wantedFrames>0); // skipped more than all frames |
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53 | |
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54 | size_t msize = wantedFrames*sizeof(*array); |
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55 | |
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56 | array = (void**)malloc(msize); |
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57 | // cppcheck-suppress arithOperationsOnVoidPointer (false positive: pointer-arithmetics on void** are completely standard compliant) |
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58 | memcpy(array, tmp+skipFramesAtBottom, msize); |
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59 | |
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60 | size = wantedFrames; |
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61 | } |
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62 | ~BackTraceInfo() { free(array); } |
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63 | |
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64 | bool dump(FILE *out, const char *message) const { |
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65 | // print out all the stack frames to 'out' |
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66 | // return true on success. |
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67 | |
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68 | if (fprintf(out, "\n-------------------- ARB-backtrace '%s':\n", message) < 0) return false; |
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69 | fflush(out); |
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70 | backtrace_symbols_fd(array, size, fileno(out)); |
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71 | if (size == MAX_BACKTRACE) fputs("[stack truncated to avoid deadlock]\n", out); |
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72 | fputs("-------------------- End of backtrace\n", out); |
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73 | return fflush(out) == 0; |
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74 | } |
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75 | }; |
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76 | |
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77 | inline void demangle_backtrace(const class BackTraceInfo& trace, FILE *out, const char *message) { |
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78 | if (!BackTraceInfo::suppress()) { |
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79 | static bool filtfailed = false; |
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80 | if (!filtfailed) { |
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81 | // @@@ Warning: this branch ignores parameter 'out' |
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82 | FILE *filt = popen("/usr/bin/c++filt", "w"); |
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83 | if (filt) { |
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84 | filtfailed = !trace.dump(filt, message); |
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85 | int exitcode = pclose(filt); |
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86 | if (exitcode != 0 && !filtfailed) filtfailed = true; |
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87 | } |
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88 | else filtfailed = true; |
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89 | } |
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90 | if (filtfailed) trace.dump(out, message); |
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91 | } |
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92 | } |
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93 | |
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94 | |
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95 | |
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96 | #else |
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97 | #error arb_backtrace.h included twice |
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98 | #endif // ARB_BACKTRACE_H |
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