126 lines · c
1/* SPDX-License-Identifier: GPL-2.0 */2#undef TRACE_SYSTEM3#define TRACE_SYSTEM signal4 5#if !defined(_TRACE_SIGNAL_H) || defined(TRACE_HEADER_MULTI_READ)6#define _TRACE_SIGNAL_H7 8#include <linux/signal.h>9#include <linux/sched.h>10#include <linux/tracepoint.h>11 12#define TP_STORE_SIGINFO(__entry, info) \13 do { \14 if (info == SEND_SIG_NOINFO) { \15 __entry->errno = 0; \16 __entry->code = SI_USER; \17 } else if (info == SEND_SIG_PRIV) { \18 __entry->errno = 0; \19 __entry->code = SI_KERNEL; \20 } else { \21 __entry->errno = info->si_errno; \22 __entry->code = info->si_code; \23 } \24 } while (0)25 26#ifndef TRACE_HEADER_MULTI_READ27enum {28 TRACE_SIGNAL_DELIVERED,29 TRACE_SIGNAL_IGNORED,30 TRACE_SIGNAL_ALREADY_PENDING,31 TRACE_SIGNAL_OVERFLOW_FAIL,32 TRACE_SIGNAL_LOSE_INFO,33};34#endif35 36/**37 * signal_generate - called when a signal is generated38 * @sig: signal number39 * @info: pointer to struct siginfo40 * @task: pointer to struct task_struct41 * @group: shared or private42 * @result: TRACE_SIGNAL_*43 *44 * Current process sends a 'sig' signal to 'task' process with45 * 'info' siginfo. If 'info' is SEND_SIG_NOINFO or SEND_SIG_PRIV,46 * 'info' is not a pointer and you can't access its field. Instead,47 * SEND_SIG_NOINFO means that si_code is SI_USER, and SEND_SIG_PRIV48 * means that si_code is SI_KERNEL.49 */50TRACE_EVENT(signal_generate,51 52 TP_PROTO(int sig, struct kernel_siginfo *info, struct task_struct *task,53 int group, int result),54 55 TP_ARGS(sig, info, task, group, result),56 57 TP_STRUCT__entry(58 __field( int, sig )59 __field( int, errno )60 __field( int, code )61 __array( char, comm, TASK_COMM_LEN )62 __field( pid_t, pid )63 __field( int, group )64 __field( int, result )65 ),66 67 TP_fast_assign(68 __entry->sig = sig;69 TP_STORE_SIGINFO(__entry, info);70 memcpy(__entry->comm, task->comm, TASK_COMM_LEN);71 __entry->pid = task->pid;72 __entry->group = group;73 __entry->result = result;74 ),75 76 TP_printk("sig=%d errno=%d code=%d comm=%s pid=%d grp=%d res=%d",77 __entry->sig, __entry->errno, __entry->code,78 __entry->comm, __entry->pid, __entry->group,79 __entry->result)80);81 82/**83 * signal_deliver - called when a signal is delivered84 * @sig: signal number85 * @info: pointer to struct siginfo86 * @ka: pointer to struct k_sigaction87 *88 * A 'sig' signal is delivered to current process with 'info' siginfo,89 * and it will be handled by 'ka'. ka->sa.sa_handler can be SIG_IGN or90 * SIG_DFL.91 * Note that some signals reported by signal_generate tracepoint can be92 * lost, ignored or modified (by debugger) before hitting this tracepoint.93 * This means, this can show which signals are actually delivered, but94 * matching generated signals and delivered signals may not be correct.95 */96TRACE_EVENT(signal_deliver,97 98 TP_PROTO(int sig, struct kernel_siginfo *info, struct k_sigaction *ka),99 100 TP_ARGS(sig, info, ka),101 102 TP_STRUCT__entry(103 __field( int, sig )104 __field( int, errno )105 __field( int, code )106 __field( unsigned long, sa_handler )107 __field( unsigned long, sa_flags )108 ),109 110 TP_fast_assign(111 __entry->sig = sig;112 TP_STORE_SIGINFO(__entry, info);113 __entry->sa_handler = (unsigned long)ka->sa.sa_handler;114 __entry->sa_flags = ka->sa.sa_flags;115 ),116 117 TP_printk("sig=%d errno=%d code=%d sa_handler=%lx sa_flags=%lx",118 __entry->sig, __entry->errno, __entry->code,119 __entry->sa_handler, __entry->sa_flags)120);121 122#endif /* _TRACE_SIGNAL_H */123 124/* This part must be outside protection */125#include <trace/define_trace.h>126