sig === :: NAME sig - task signal handling SYNOPSIS sig [[-l] | [-s sigset]] | [-g] [pid | taskp] ... DESCRIPTION This command displays signal-handling data of one or more tasks. Multiple task or PID numbers may be entered; if no arguments are entered, the signal handling data of the current context will be displayed. The default display shows: 1. A formatted dump of the "sig" signal_struct structure referenced by the task_struct. For each defined signal, it shows the sigaction structure address, the signal handler, the signal sigset_t mask (also expressed as a 64-bit hexadecimal value), and the flags. 2. Whether the task has an unblocked signal pending. 3. The contents of the "blocked" and "signal" sigset_t structures from the task_struct/signal_struct, both of which are represented as a 64-bit hexadecimal value. 4. For each queued signal, private and/or shared, if any, its signal number and associated siginfo structure address. The -l option lists the signal numbers and their name(s). The -s option translates a 64-bit hexadecimal value representing the contents of a sigset_t structure into the signal names whose bits are set. pid a process PID. taskp a hexadecimal task_struct pointer. -g displays signal information for all threads in a task's thread group. -l displays the defined signal numbers and names. -s sigset translates a 64-bit hexadecimal value representing a sigset_t into a list of signal names associated with the bits set. EXAMPLES Dump the signal-handling data of PID 8970: crash> sig 8970 PID: 8970 TASK: f67d8560 CPU: 1 COMMAND: "procsig" SIGNAL_STRUCT: f6018680 COUNT: 1 SIG SIGACTION HANDLER MASK FLAGS [1] f7877684 SIG_DFL 0000000000000000 0 [2] f7877698 SIG_DFL 0000000000000000 0 ... [8] f7877710 SIG_DFL 0000000000000000 0 [9] f7877724 SIG_DFL 0000000000000000 0 [10] f7877738 804867a 0000000000000000 80000000 (SA_RESETHAND) [11] f787774c SIG_DFL 0000000000000000 0 [12] f7877760 804867f 0000000000000000 10000004 (SA_SIGINFO|SA_RESTART) [13] f7877774 SIG_DFL 0000000000000000 0 ... [31] f78778dc SIG_DFL 0000000000000000 0 [32] f78778f0 SIG_DFL 0000000000000000 0 [33] f7877904 SIG_DFL 0000000000000000 0 [34] f7877918 804867f 0000000000000000 10000004 (SA_SIGINFO|SA_RESTART) [35] f787792c SIG_DFL 0000000000000000 0 [36] f7877940 SIG_DFL 0000000000000000 0 ... [58] f7877af8 SIG_DFL 0000000000000000 0 [59] f7877b0c SIG_DFL 0000000000000000 0 [60] f7877b20 SIG_DFL 0000000000000000 0 [61] f7877b34 SIG_DFL 0000000000000000 0 [62] f7877b48 SIG_DFL 0000000000000000 0 [63] f7877b5c SIG_DFL 0000000000000000 0 [64] f7877b70 804867f 0000000000000000 10000004 (SA_SIGINFO|SA_RESTART) SIGPENDING: no BLOCKED: 8000000200000800 PRIVATE_PENDING SIGNAL: 0000000200000800 SIGQUEUE: SIG SIGINFO 12 f51b9c84 34 f51b9594 SHARED_PENDING SIGNAL: 8000000000000800 SIGQUEUE: SIG SIGINFO 12 f51b9188 64 f51b9d18 64 f51b9500 Dump the signal-handling data for all tasks in the thread group containing PID 2578: crash> sig -g 2578 PID: 2387 TASK: f617d020 CPU: 0 COMMAND: "slapd" SIGNAL_STRUCT: f7dede00 COUNT: 6 SIG SIGACTION HANDLER MASK FLAGS [1] c1f60c04 a258a7 0000000000000000 10000000 (SA_RESTART) [2] c1f60c18 a258a7 0000000000000000 10000000 (SA_RESTART) [3] c1f60c2c SIG_DFL 0000000000000000 0 [4] c1f60c40 SIG_DFL 0000000000000000 0 [5] c1f60c54 a258a7 0000000000000000 10000000 (SA_RESTART) [6] c1f60c68 SIG_DFL 0000000000000000 0 [7] c1f60c7c SIG_DFL 0000000000000000 0 [8] c1f60c90 SIG_DFL 0000000000000000 0 [9] c1f60ca4 SIG_DFL 0000000000000000 0 [10] c1f60cb8 a25911 0000000000000000 10000000 (SA_RESTART) ... [64] c1f610f0 SIG_DFL 0000000000000000 0 SHARED_PENDING SIGNAL: 0000000000000000 SIGQUEUE: (empty) PID: 2387 TASK: f617d020 CPU: 0 COMMAND: "slapd" SIGPENDING: no BLOCKED: 0000000000000000 PRIVATE_PENDING SIGNAL: 0000000000000000 SIGQUEUE: (empty) PID: 2392 TASK: f6175aa0 CPU: 0 COMMAND: "slapd" SIGPENDING: no BLOCKED: 0000000000000000 PRIVATE_PENDING SIGNAL: 0000000000000000 SIGQUEUE: (empty) PID: 2523 TASK: f7cd4aa0 CPU: 1 COMMAND: "slapd" SIGPENDING: no BLOCKED: 0000000000000000 PRIVATE_PENDING SIGNAL: 0000000000000000 SIGQUEUE: (empty) ... Translate the sigset_t mask value, cut-and-pasted from the signal handling data from signals 1 and 10 above: crash> sig -s 800A000000000201 SIGHUP SIGUSR1 SIGRTMAX-14 SIGRTMAX-12 SIGRTMAX List the signal numbers and their names: crash> sig -l [1] SIGHUP [2] SIGINT [3] SIGQUIT [4] SIGILL [5] SIGTRAP [6] SIGABRT/SIGIOT [7] SIGBUS [8] SIGFPE [9] SIGKILL [10] SIGUSR1 [11] SIGSEGV [12] SIGUSR2 [13] SIGPIPE [14] SIGALRM [15] SIGTERM [16] SIGSTKFLT [17] SIGCHLD/SIGCLD [18] SIGCONT [19] SIGSTOP [20] SIGTSTP [21] SIGTTIN [22] SIGTTOU [23] SIGURG [24] SIGXCPU [25] SIGXFSZ [26] SIGVTALRM [27] SIGPROF [28] SIGWINCH [29] SIGIO/SIGPOLL [30] SIGPWR [31] SIGSYS [32] SIGRTMIN [33] SIGRTMIN+1 [34] SIGRTMIN+2 [35] SIGRTMIN+3 [36] SIGRTMIN+4 [37] SIGRTMIN+5 [38] SIGRTMIN+6 [39] SIGRTMIN+7 [40] SIGRTMIN+8 [41] SIGRTMIN+9 [42] SIGRTMIN+10 [43] SIGRTMIN+11 [44] SIGRTMIN+12 [45] SIGRTMIN+13 [46] SIGRTMIN+14 [47] SIGRTMIN+15 [48] SIGRTMIN+16 [49] SIGRTMAX-15 [50] SIGRTMAX-14 [51] SIGRTMAX-13 [52] SIGRTMAX-12 [53] SIGRTMAX-11 [54] SIGRTMAX-10 [55] SIGRTMAX-9 [56] SIGRTMAX-8 [57] SIGRTMAX-7 [58] SIGRTMAX-6 [59] SIGRTMAX-5 [60] SIGRTMAX-4 [61] SIGRTMAX-3 [62] SIGRTMAX-2 [63] SIGRTMAX-1 [64] SIGRTMAX