systemd-coredump: add COREDUMP_CODE (#42019)
Add COREDUMP_CODE to the fields captured by systemd-coredump. This makes
it possible for system administrators to filter coredumps based on si_code,
which describes the reason why a given signal was sent.
For example, to find processes killed due to invalid permissions
(SEGV_ACCERR):
$ journalctl COREDUMP_SIGNAL=11 COREDUMP_CODE=2
I've decided to add the value of si_code to the 'Signal: ' line of
coredumpctl info:
Signal: 11 (SEGV) si_code: SEGV_ACCERR
This commit is contained in:
Yu Watanabe
@@ -223,6 +223,154 @@ int signal_from_string(const char *s) {
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return -EINVAL;
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}
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static const char *const sigill_code_table[] = {
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[ILL_ILLOPC] = "ILL_ILLOPC",
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[ILL_ILLOPN] = "ILL_ILLOPN",
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[ILL_ILLADR] = "ILL_ILLADR",
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[ILL_ILLTRP] = "ILL_ILLTRP",
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[ILL_PRVOPC] = "ILL_PRVOPC",
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[ILL_PRVREG] = "ILL_PRVREG",
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[ILL_COPROC] = "ILL_COPROC",
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[ILL_BADSTK] = "ILL_BADSTK",
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[ILL_BADIADDR] = "ILL_BADIADDR",
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};
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DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(sigill_code, int);
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static const char *const sigfpe_code_table[] = {
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[FPE_INTDIV] = "FPE_INTDIV",
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[FPE_INTOVF] = "FPE_INTOVF",
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[FPE_FLTDIV] = "FPE_FLTDIV",
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[FPE_FLTOVF] = "FPE_FLTOVF",
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[FPE_FLTUND] = "FPE_FLTUND",
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[FPE_FLTRES] = "FPE_FLTRES",
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[FPE_FLTINV] = "FPE_FLTINV",
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[FPE_FLTSUB] = "FPE_FLTSUB",
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[FPE_FLTUNK] = "FPE_FLTUNK",
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[FPE_CONDTRAP] = "FPE_CONDTRAP",
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};
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DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(sigfpe_code, int);
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static const char *const sigsegv_code_table[] = {
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[SEGV_MAPERR] = "SEGV_MAPERR",
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[SEGV_ACCERR] = "SEGV_ACCERR",
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[SEGV_BNDERR] = "SEGV_BNDERR",
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[SEGV_PKUERR] = "SEGV_PKUERR",
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[SEGV_ACCADI] = "SEGV_ACCADI",
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[SEGV_ADIDERR] = "SEGV_ADIDERR",
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[SEGV_ADIPERR] = "SEGV_ADIPERR",
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[SEGV_MTEAERR] = "SEGV_MTEAERR",
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[SEGV_MTESERR] = "SEGV_MTESERR",
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[SEGV_CPERR] = "SEGV_CPERR",
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};
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DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(sigsegv_code, int);
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static const char *const sigbus_code_table[] = {
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[BUS_ADRALN] = "BUS_ADRALN",
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[BUS_ADRERR] = "BUS_ADRERR",
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[BUS_OBJERR] = "BUS_OBJERR",
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[BUS_MCEERR_AR] = "BUS_MCEERR_AR",
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[BUS_MCEERR_AO] = "BUS_MCEERR_AO",
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};
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DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(sigbus_code, int);
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static const char *const sigtrap_code_table[] = {
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[TRAP_BRKPT] = "TRAP_BRKPT",
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[TRAP_TRACE] = "TRAP_TRACE",
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[TRAP_BRANCH] = "TRAP_BRANCH",
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[TRAP_HWBKPT] = "TRAP_HWBKPT",
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[TRAP_UNK] = "TRAP_UNK",
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[TRAP_PERF] = "TRAP_PERF",
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};
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DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(sigtrap_code, int);
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static const char *const sigsys_code_table[] = {
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[SYS_SECCOMP] = "SYS_SECCOMP",
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[SYS_USER_DISPATCH] = "SYS_USER_DISPATCH",
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};
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DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(sigsys_code, int);
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/* sigchld_code_table is already defined in src/basic/process-util.c with
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* decoded, lower-case values (CLD_EXITED -> "exited"). For consistency with
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* all other values decoded here, provide an uppercase variant. */
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static const char *const sigchld_uppercase_code_table[] = {
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[CLD_EXITED] = "CLD_EXITED",
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[CLD_KILLED] = "CLD_KILLED",
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[CLD_DUMPED] = "CLD_DUMPED",
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[CLD_TRAPPED] = "CLD_TRAPPED",
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[CLD_STOPPED] = "CLD_STOPPED",
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[CLD_CONTINUED] = "CLD_CONTINUED",
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};
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DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(sigchld_uppercase_code, int);
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static const char *const sigpoll_code_table[] = {
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[POLL_IN] = "POLL_IN",
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[POLL_OUT] = "POLL_OUT",
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[POLL_MSG] = "POLL_MSG",
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[POLL_ERR] = "POLL_ERR",
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[POLL_PRI] = "POLL_PRI",
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[POLL_HUP] = "POLL_HUP",
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};
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DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(sigpoll_code, int);
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const char* signal_code_to_string(int signo, int code) {
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switch (code) {
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/* SI_KERNEL is 0x80 (128). Defining a table just for SI_KERNEL and
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* SI_USER would be a waste of .rodata space: special case them instead. */
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case SI_KERNEL:
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return "SI_KERNEL";
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case SI_USER:
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return "SI_USER";
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/* The following values are all negatives. SI_ASYNCNL is -60. Similarly
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* to the special case for SI_KERNEL above, avoid using a table for negative
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* values as well. */
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case SI_ASYNCNL:
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return "SI_ASYNCNL";
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case SI_DETHREAD:
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return "SI_DETHREAD";
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case SI_TKILL:
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return "SI_TKILL";
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case SI_SIGIO:
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return "SI_SIGIO";
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case SI_ASYNCIO:
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return "SI_ASYNCIO";
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case SI_MESGQ:
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return "SI_MESGQ";
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case SI_TIMER:
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return "SI_TIMER";
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case SI_QUEUE:
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return "SI_QUEUE";
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}
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switch (signo) {
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case SIGILL:
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return sigill_code_to_string(code);
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case SIGFPE:
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return sigfpe_code_to_string(code);
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case SIGSEGV:
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return sigsegv_code_to_string(code);
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case SIGBUS:
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return sigbus_code_to_string(code);
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case SIGTRAP:
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return sigtrap_code_to_string(code);
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case SIGCHLD:
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return sigchld_uppercase_code_to_string(code);
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case SIGPOLL:
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return sigpoll_code_to_string(code);
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case SIGSYS:
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return sigsys_code_to_string(code);
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default:
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return NULL;
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}
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}
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void nop_signal_handler(int sig) {
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/* nothing here */
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}
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@@ -32,6 +32,7 @@ int sigprocmask_many_internal(int how, sigset_t *ret_old_mask, ...);
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#define sigprocmask_many(...) sigprocmask_many_internal(__VA_ARGS__, -1)
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DECLARE_STRING_TABLE_LOOKUP(signal, int);
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const char* signal_code_to_string(int signo, int code) _const_;
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void nop_signal_handler(int sig);
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