Masami Hiramatsu | d1eb650 | 2009-11-24 16:56:45 -0500 | [diff] [blame] | 1 | #undef TRACE_SYSTEM |
| 2 | #define TRACE_SYSTEM signal |
| 3 | |
| 4 | #if !defined(_TRACE_SIGNAL_H) || defined(TRACE_HEADER_MULTI_READ) |
| 5 | #define _TRACE_SIGNAL_H |
| 6 | |
| 7 | #include <linux/signal.h> |
| 8 | #include <linux/sched.h> |
| 9 | #include <linux/tracepoint.h> |
| 10 | |
| 11 | #define TP_STORE_SIGINFO(__entry, info) \ |
| 12 | do { \ |
| 13 | if (info == SEND_SIG_NOINFO) { \ |
| 14 | __entry->errno = 0; \ |
| 15 | __entry->code = SI_USER; \ |
| 16 | } else if (info == SEND_SIG_PRIV) { \ |
| 17 | __entry->errno = 0; \ |
| 18 | __entry->code = SI_KERNEL; \ |
| 19 | } else { \ |
| 20 | __entry->errno = info->si_errno; \ |
| 21 | __entry->code = info->si_code; \ |
| 22 | } \ |
| 23 | } while (0) |
| 24 | |
| 25 | /** |
| 26 | * signal_generate - called when a signal is generated |
| 27 | * @sig: signal number |
| 28 | * @info: pointer to struct siginfo |
| 29 | * @task: pointer to struct task_struct |
| 30 | * |
| 31 | * Current process sends a 'sig' signal to 'task' process with |
| 32 | * 'info' siginfo. If 'info' is SEND_SIG_NOINFO or SEND_SIG_PRIV, |
| 33 | * 'info' is not a pointer and you can't access its field. Instead, |
| 34 | * SEND_SIG_NOINFO means that si_code is SI_USER, and SEND_SIG_PRIV |
| 35 | * means that si_code is SI_KERNEL. |
| 36 | */ |
| 37 | TRACE_EVENT(signal_generate, |
| 38 | |
| 39 | TP_PROTO(int sig, struct siginfo *info, struct task_struct *task), |
| 40 | |
| 41 | TP_ARGS(sig, info, task), |
| 42 | |
| 43 | TP_STRUCT__entry( |
| 44 | __field( int, sig ) |
| 45 | __field( int, errno ) |
| 46 | __field( int, code ) |
| 47 | __array( char, comm, TASK_COMM_LEN ) |
| 48 | __field( pid_t, pid ) |
| 49 | ), |
| 50 | |
| 51 | TP_fast_assign( |
| 52 | __entry->sig = sig; |
| 53 | TP_STORE_SIGINFO(__entry, info); |
| 54 | memcpy(__entry->comm, task->comm, TASK_COMM_LEN); |
| 55 | __entry->pid = task->pid; |
| 56 | ), |
| 57 | |
| 58 | TP_printk("sig=%d errno=%d code=%d comm=%s pid=%d", |
| 59 | __entry->sig, __entry->errno, __entry->code, |
| 60 | __entry->comm, __entry->pid) |
| 61 | ); |
| 62 | |
Masami Hiramatsu | f9d4257 | 2009-11-24 16:56:51 -0500 | [diff] [blame] | 63 | /** |
| 64 | * signal_deliver - called when a signal is delivered |
| 65 | * @sig: signal number |
| 66 | * @info: pointer to struct siginfo |
| 67 | * @ka: pointer to struct k_sigaction |
| 68 | * |
| 69 | * A 'sig' signal is delivered to current process with 'info' siginfo, |
| 70 | * and it will be handled by 'ka'. ka->sa.sa_handler can be SIG_IGN or |
| 71 | * SIG_DFL. |
| 72 | * Note that some signals reported by signal_generate tracepoint can be |
| 73 | * lost, ignored or modified (by debugger) before hitting this tracepoint. |
| 74 | * This means, this can show which signals are actually delivered, but |
| 75 | * matching generated signals and delivered signals may not be correct. |
| 76 | */ |
| 77 | TRACE_EVENT(signal_deliver, |
| 78 | |
| 79 | TP_PROTO(int sig, struct siginfo *info, struct k_sigaction *ka), |
| 80 | |
| 81 | TP_ARGS(sig, info, ka), |
| 82 | |
| 83 | TP_STRUCT__entry( |
| 84 | __field( int, sig ) |
| 85 | __field( int, errno ) |
| 86 | __field( int, code ) |
| 87 | __field( unsigned long, sa_handler ) |
| 88 | __field( unsigned long, sa_flags ) |
| 89 | ), |
| 90 | |
| 91 | TP_fast_assign( |
| 92 | __entry->sig = sig; |
| 93 | TP_STORE_SIGINFO(__entry, info); |
| 94 | __entry->sa_handler = (unsigned long)ka->sa.sa_handler; |
| 95 | __entry->sa_flags = ka->sa.sa_flags; |
| 96 | ), |
| 97 | |
| 98 | TP_printk("sig=%d errno=%d code=%d sa_handler=%lx sa_flags=%lx", |
| 99 | __entry->sig, __entry->errno, __entry->code, |
| 100 | __entry->sa_handler, __entry->sa_flags) |
| 101 | ); |
Masami Hiramatsu | ba005e1 | 2009-11-24 16:56:58 -0500 | [diff] [blame] | 102 | |
| 103 | /** |
| 104 | * signal_overflow_fail - called when signal queue is overflow |
| 105 | * @sig: signal number |
| 106 | * @group: signal to process group or not (bool) |
| 107 | * @info: pointer to struct siginfo |
| 108 | * |
| 109 | * Kernel fails to generate 'sig' signal with 'info' siginfo, because |
| 110 | * siginfo queue is overflow, and the signal is dropped. |
| 111 | * 'group' is not 0 if the signal will be sent to a process group. |
| 112 | * 'sig' is always one of RT signals. |
| 113 | */ |
| 114 | TRACE_EVENT(signal_overflow_fail, |
| 115 | |
| 116 | TP_PROTO(int sig, int group, struct siginfo *info), |
| 117 | |
| 118 | TP_ARGS(sig, group, info), |
| 119 | |
| 120 | TP_STRUCT__entry( |
| 121 | __field( int, sig ) |
| 122 | __field( int, group ) |
| 123 | __field( int, errno ) |
| 124 | __field( int, code ) |
| 125 | ), |
| 126 | |
| 127 | TP_fast_assign( |
| 128 | __entry->sig = sig; |
| 129 | __entry->group = group; |
| 130 | TP_STORE_SIGINFO(__entry, info); |
| 131 | ), |
| 132 | |
| 133 | TP_printk("sig=%d group=%d errno=%d code=%d", |
| 134 | __entry->sig, __entry->group, __entry->errno, __entry->code) |
| 135 | ); |
| 136 | |
| 137 | /** |
| 138 | * signal_lose_info - called when siginfo is lost |
| 139 | * @sig: signal number |
| 140 | * @group: signal to process group or not (bool) |
| 141 | * @info: pointer to struct siginfo |
| 142 | * |
| 143 | * Kernel generates 'sig' signal but loses 'info' siginfo, because siginfo |
| 144 | * queue is overflow. |
| 145 | * 'group' is not 0 if the signal will be sent to a process group. |
| 146 | * 'sig' is always one of non-RT signals. |
| 147 | */ |
| 148 | TRACE_EVENT(signal_lose_info, |
| 149 | |
| 150 | TP_PROTO(int sig, int group, struct siginfo *info), |
| 151 | |
| 152 | TP_ARGS(sig, group, info), |
| 153 | |
| 154 | TP_STRUCT__entry( |
| 155 | __field( int, sig ) |
| 156 | __field( int, group ) |
| 157 | __field( int, errno ) |
| 158 | __field( int, code ) |
| 159 | ), |
| 160 | |
| 161 | TP_fast_assign( |
| 162 | __entry->sig = sig; |
| 163 | __entry->group = group; |
| 164 | TP_STORE_SIGINFO(__entry, info); |
| 165 | ), |
| 166 | |
| 167 | TP_printk("sig=%d group=%d errno=%d code=%d", |
| 168 | __entry->sig, __entry->group, __entry->errno, __entry->code) |
| 169 | ); |
Masami Hiramatsu | d1eb650 | 2009-11-24 16:56:45 -0500 | [diff] [blame] | 170 | #endif /* _TRACE_SIGNAL_H */ |
| 171 | |
| 172 | /* This part must be outside protection */ |
| 173 | #include <trace/define_trace.h> |