htons:long (x:long)
Convert from host to network byte order, 16-bit.
+.SS SIGNAL
+.TP
+get_sa_flags:long (act:long)
+Returns the numeric value of sa_flags.
+.TP
+get_sa_handler:long (act:long)
+Returns the numeric value of sa_handler.
+.TP
+sigset_mask_str:string (mask:long)
+Returns the string representation of the sigset sa_mask.
+.TP
+is_sig_blocked:long (task:long, sig:long)
+Returns 1 if the signal is currently blocked, or 0 if it is not.
+.TP
+sa_flags_str:string (sa_flags:long)
+Returns the string representation of sa_flags.
+.TP
+sa_handler_str(handler)
+Returns the string representation of sa_handler. If it is not SIG_DFL, SIG_IGN
+or SIG_ERR, it will return the address of the handler.
+.TP
+signal_str(num)
+Returns the string representation of the given signal number.
.SH FILES
.nh
+2008-01-16 Eugene Teo <eteo@redhat.com>
+
+ * signal.stp (get_sa_flags, get_sa_handler): New functions to
+ return addresses of sa_flags and sa_handler of struct k_sigaction.
+ (sigset_mask_str): New function. Returns a string containing the
+ set of signals to be blocked when executing the signal handler.
+ (is_sig_blocked): New function. Checks task_struct->blocked signal
+ mask for signals that are currently blocked.
+ (signal_str): New function. Translates a signal number.
+ (sa_flags_str): New function. Translates the sa_flags.
+ (sa_handler_str): New function. Returns the signal action or handler
+ associated to the signal.
+
2008-1-4 Masami Hiramatsu <mhiramat@redhat.com>
* aux_syscalls.stp (_stp_fork_list): Check kernel version for new
// Signal tapset
// Copyright (C) 2006 IBM Corp.
// Copyright (C) 2006 Intel Corporation.
+// Copyright (C) 2008 Red Hat, Inc.
//
// This file is part of systemtap, and is free software. You can
// redistribute it and/or modify it under the terms of the GNU General
sig_pid = $t->pid
pid_name = kernel_string($t->comm)
}
+
+function get_sa_flags:long (act:long) %{ /* pure */
+ struct k_sigaction *act = (struct k_sigaction *)((long)THIS->act);
+ THIS->__retvalue = kread(&act->sa.sa_flags);
+ CATCH_DEREF_FAULT();
+%}
+
+function get_sa_handler:long (act:long) %{ /* pure */
+ struct k_sigaction *act = (struct k_sigaction *)((long)THIS->act);
+ THIS->__retvalue = (long)kread(&act->sa.sa_handler);
+ CATCH_DEREF_FAULT();
+%}
+
+/*
+ * sa_mask contains the set of signals to be blocked when executing the
+ * signal handler. This function returns a string, delimited by ",".
+ *
+ * struct task_struct {
+ * [...]
+ * struct signal_struct *signal;
+ * struct sighand_struct *sighand;
+ * [...]
+ * struct sighand_struct {
+ * atomic_t count;
+ * struct k_sigaction action[_NSIG];
+ * [...]
+ * struct k_sigaction {
+ * struct sigaction sa;
+ * };
+ *
+ * struct sigaction {
+ * [...]
+ * sigset_t sa_mask;
+ * };
+ */
+function sigset_mask_str:string (mask:long) %{ /* pure */
+ int i, len;
+ char *str = THIS->__retvalue, tmp[5];
+ for (i = 1; i < _NSIG; ++i, THIS->mask >>=1)
+ if (THIS->mask & 1) {
+ sprintf(tmp, "%u,", i);
+ strlcat(str, tmp, MAXSTRINGLEN);
+ }
+ len = strlen(str);
+ if (len) str[len - 1] = '\0';
+%}
+
+/*
+ * task_struct->blocked signal mask contains the set of signals that are
+ * currently blocked.
+ *
+ * struct task_struct {
+ * [...]
+ * sigset_t blocked, real_blocked;
+ */
+function is_sig_blocked:long (task:long, sig:long) %{ /* pure */
+ int i;
+ sigset_t blocked;
+ struct task_struct *p = (struct task_struct *)((long)THIS->task);
+ for (i = 0; i < _NSIG_WORDS; ++i)
+ blocked.sig[i] = kread(&p->blocked.sig[i]);
+ THIS->__retvalue = sigismember(&blocked, THIS->sig);
+ CATCH_DEREF_FAULT();
+%}
+
+function sa_flags_str:string (sa_flags:long) %{ /* pure */
+ int len;
+ char *str = THIS->__retvalue;
+ if (THIS->sa_flags & 0x00000001u) strlcat(str, "NOCLDSTOP|", MAXSTRINGLEN);
+ if (THIS->sa_flags & 0x00000002u) strlcat(str, "NOCLDWAIT|", MAXSTRINGLEN);
+ if (THIS->sa_flags & 0x00000004u) strlcat(str, "SIGINFO|", MAXSTRINGLEN);
+ if (THIS->sa_flags & 0x08000000u) strlcat(str, "ONSTACK|", MAXSTRINGLEN);
+ if (THIS->sa_flags & 0x10000000u) strlcat(str, "RESTART|", MAXSTRINGLEN);
+ if (THIS->sa_flags & 0x40000000u) strlcat(str, "NODEFER|", MAXSTRINGLEN);
+ if (THIS->sa_flags & 0x80000000u) strlcat(str, "RESETHAND|", MAXSTRINGLEN);
+ if (THIS->sa_flags & 0x04000000) strlcat(str, "RESTORER|", MAXSTRINGLEN);
+ len = strlen(str);
+ if (len) str[len - 1] = '\0';
+%}
+
+function sa_handler_str(handler) {
+ if (handler == 0) return "default"; /* SIG_DFL */
+ if (handler == 1) return "ignored"; /* SIG_IGN */
+ if (handler == -1) return "error"; /* SIG_ERR */
+ return sprintf("%p", handler); /* userspace address */
+}
+
+/*
+ * Signals start from 1 not 0.
+ */
+function signal_str(num) {
+ return __sig[num]
+}
+
+global __sig[64]
+
+probe begin(-1) {
+ __sig[1] = "HUP"
+ __sig[2] = "INT"
+ __sig[3] = "QUIT"
+ __sig[4] = "ILL"
+ __sig[5] = "TRAP"
+ __sig[6] = "ABRT" /* or IOT */
+ __sig[7] = "BUS"
+ __sig[8] = "FPE"
+ __sig[9] = "KILL"
+ __sig[10] = "USR1"
+ __sig[11] = "SEGV"
+ __sig[12] = "USR2"
+ __sig[13] = "PIPE"
+ __sig[14] = "ALRM"
+ __sig[15] = "TERM"
+ __sig[16] = "STKFLT"
+ __sig[17] = "CHLD" /* or CLD */
+ __sig[18] = "CONT"
+ __sig[19] = "STOP"
+ __sig[20] = "TSTP"
+ __sig[21] = "TTIN"
+ __sig[22] = "TTOU"
+ __sig[23] = "URG"
+ __sig[24] = "XCPU"
+ __sig[25] = "XFSZ"
+ __sig[26] = "VTALRM"
+ __sig[27] = "PROF"
+ __sig[28] = "WINCH"
+ __sig[29] = "IO/POLL"
+ __sig[30] = "PWR"
+ __sig[31] = "SYS" /* or UNUSED */
+ __sig[32] = "RTMIN"
+ __sig[33] = "RTMIN+1"
+ __sig[34] = "RTMIN+2"
+ __sig[35] = "RTMIN+3"
+ __sig[36] = "RTMIN+4"
+ __sig[37] = "RTMIN+5"
+ __sig[38] = "RTMIN+6"
+ __sig[39] = "RTMIN+7"
+ __sig[40] = "RTMIN+8"
+ __sig[41] = "RTMIN+9"
+ __sig[42] = "RTMIN+10"
+ __sig[43] = "RTMIN+11"
+ __sig[44] = "RTMIN+12"
+ __sig[45] = "RTMIN+13"
+ __sig[46] = "RTMIN+14"
+ __sig[47] = "RTMIN+15"
+ __sig[48] = "RTMIN+16"
+ __sig[49] = "RTMIN+17"
+ __sig[50] = "RTMIN+18"
+ __sig[51] = "RTMIN+19"
+ __sig[52] = "RTMIN+20"
+ __sig[53] = "RTMIN+21"
+ __sig[54] = "RTMIN+22"
+ __sig[55] = "RTMIN+23"
+ __sig[56] = "RTMIN+24"
+ __sig[57] = "RTMIN+25"
+ __sig[58] = "RTMIN+26"
+ __sig[59] = "RTMIN+27"
+ __sig[60] = "RTMIN+28"
+ __sig[61] = "RTMIN+29"
+ __sig[62] = "RTMIN+30"
+ __sig[63] = "RTMIN+31"
+ __sig[64] = "RTMIN+32"
+}
git://sourceware.org / systemtap.git / commitdiff