| 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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