* Entry pointer for signal handlers * It uses functions which are not safe to be called from a signal handler, * (http://pubs.opengroup.org/onlinepubs/9699919799/functions/V2_chap02.html#tag_15_04 has a whitelist) * but when ending up here something went terribly wrong anyway. * And all which is left is just printing some information and terminate. */
| 107 | * And all which is left is just printing some information and terminate. |
| 108 | */ |
| 109 | static void CppcheckSignalHandler(int signo, siginfo_t * info, void * context) // cppcheck-suppress constParameterCallback - info can be const |
| 110 | { |
| 111 | const char* typeStr = ""; |
| 112 | pid_t killid; |
| 113 | // TODO: separate these two defines |
| 114 | #if defined(__linux__) && defined(REG_ERR) |
| 115 | const auto* const uc = reinterpret_cast<const ucontext_t*>(context); |
| 116 | killid = static_cast<pid_t>(syscall(SYS_gettid)); |
| 117 | if (uc) { |
| 118 | const int type = static_cast<int>(uc->uc_mcontext.gregs[REG_ERR]) & 2; |
| 119 | typeStr = (type == 0) ? "reading " : "writing "; |
| 120 | } |
| 121 | #else |
| 122 | (void)context; |
| 123 | killid = getpid(); |
| 124 | #endif |
| 125 | |
| 126 | const auto it = listofsignals.find(signo); |
| 127 | const char * const signame = (it==listofsignals.end()) ? "unknown" : it->second.c_str(); |
| 128 | bool unexpectedSignal=true; // unexpected indicates program failure |
| 129 | bool terminate=true; // exit process/thread |
| 130 | const bool isAddressOnStack = IsAddressOnStack(info->si_addr); |
| 131 | FILE * const output = signalOutput; |
| 132 | switch (signo) { |
| 133 | case SIGABRT: |
| 134 | fputs("Internal error: cppcheck received signal ", output); |
| 135 | fputs(signame, output); |
| 136 | fputs( |
| 137 | #ifdef NDEBUG |
| 138 | " - abort\n", |
| 139 | #else |
| 140 | " - abort or assertion\n", |
| 141 | #endif |
| 142 | output); |
| 143 | break; |
| 144 | case SIGBUS: |
| 145 | fputs("Internal error: cppcheck received signal ", output); |
| 146 | fputs(signame, output); |
| 147 | switch (info->si_code) { |
| 148 | case BUS_ADRALN: // invalid address alignment |
| 149 | fputs(" - BUS_ADRALN", output); |
| 150 | break; |
| 151 | case BUS_ADRERR: // nonexistent physical address |
| 152 | fputs(" - BUS_ADRERR", output); |
| 153 | break; |
| 154 | case BUS_OBJERR: // object-specific hardware error |
| 155 | fputs(" - BUS_OBJERR", output); |
| 156 | break; |
| 157 | #ifdef BUS_MCEERR_AR |
| 158 | case BUS_MCEERR_AR: // Hardware memory error consumed on a machine check; |
| 159 | fputs(" - BUS_MCEERR_AR", output); |
| 160 | break; |
| 161 | #endif |
| 162 | #ifdef BUS_MCEERR_AO |
| 163 | case BUS_MCEERR_AO: // Hardware memory error detected in process but not consumed |
| 164 | fputs(" - BUS_MCEERR_AO", output); |
| 165 | break; |
| 166 | #endif |
nothing calls this directly
no test coverage detected