--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0-only */
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM signal
+
+#if !defined(LTTNG_TRACE_SIGNAL_H) || defined(TRACE_HEADER_MULTI_READ)
+#define LTTNG_TRACE_SIGNAL_H
+
+#include <lttng/tracepoint-event.h>
+#include <linux/version.h>
+
+#ifndef _TRACE_SIGNAL_DEF
+#define _TRACE_SIGNAL_DEF
+#include <linux/signal.h>
+#include <linux/sched.h>
+#undef LTTNG_FIELDS_SIGINFO
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,20,0) || \
+ LTTNG_RHEL_KERNEL_RANGE(4,18,0,147,0,0, 4,19,0,0,0,0))
+#define LTTNG_FIELDS_SIGINFO(info) \
+ ctf_integer(int, errno, \
+ (info == SEND_SIG_NOINFO || info == SEND_SIG_PRIV) ? \
+ 0 : \
+ info->si_errno) \
+ ctf_integer(int, code, \
+ (info == SEND_SIG_NOINFO) ? \
+ SI_USER : \
+ ((info == SEND_SIG_PRIV) ? SI_KERNEL : info->si_code))
+#else /* LINUX_VERSION_CODE >= KERNEL_VERSION(4,20,0) */
+#define LTTNG_FIELDS_SIGINFO(info) \
+ ctf_integer(int, errno, \
+ (info == SEND_SIG_NOINFO || info == SEND_SIG_FORCED || info == SEND_SIG_PRIV) ? \
+ 0 : \
+ info->si_errno) \
+ ctf_integer(int, code, \
+ (info == SEND_SIG_NOINFO || info == SEND_SIG_FORCED) ? \
+ SI_USER : \
+ ((info == SEND_SIG_PRIV) ? SI_KERNEL : info->si_code))
+#endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(4,20,0) */
+#endif /* _TRACE_SIGNAL_DEF */
+
+/**
+ * signal_generate - called when a signal is generated
+ * @sig: signal number
+ * @info: pointer to struct siginfo
+ * @task: pointer to struct task_struct
+ *
+ * Current process sends a 'sig' signal to 'task' process with
+ * 'info' siginfo. If 'info' is SEND_SIG_NOINFO or SEND_SIG_PRIV,
+ * 'info' is not a pointer and you can't access its field. Instead,
+ * SEND_SIG_NOINFO means that si_code is SI_USER, and SEND_SIG_PRIV
+ * means that si_code is SI_KERNEL.
+ */
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,20,0) || \
+ LTTNG_RHEL_KERNEL_RANGE(4,18,0,147,0,0, 4,19,0,0,0,0))
+LTTNG_TRACEPOINT_EVENT(signal_generate,
+
+ TP_PROTO(int sig, struct kernel_siginfo *info, struct task_struct *task,
+ int group, int result),
+
+ TP_ARGS(sig, info, task, group, result),
+
+ TP_FIELDS(
+ ctf_integer(int, sig, sig)
+ LTTNG_FIELDS_SIGINFO(info)
+ ctf_array_text(char, comm, task->comm, TASK_COMM_LEN)
+ ctf_integer(pid_t, pid, task->pid)
+ ctf_integer(int, group, group)
+ ctf_integer(int, result, result)
+ )
+)
+#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
+LTTNG_TRACEPOINT_EVENT(signal_generate,
+
+ TP_PROTO(int sig, struct siginfo *info, struct task_struct *task,
+ int group, int result),
+
+ TP_ARGS(sig, info, task, group, result),
+
+ TP_FIELDS(
+ ctf_integer(int, sig, sig)
+ LTTNG_FIELDS_SIGINFO(info)
+ ctf_array_text(char, comm, task->comm, TASK_COMM_LEN)
+ ctf_integer(pid_t, pid, task->pid)
+ ctf_integer(int, group, group)
+ ctf_integer(int, result, result)
+ )
+)
+#else
+LTTNG_TRACEPOINT_EVENT(signal_generate,
+
+ TP_PROTO(int sig, struct siginfo *info, struct task_struct *task),
+
+ TP_ARGS(sig, info, task),
+
+ TP_FIELDS(
+ ctf_integer(int, sig, sig)
+ LTTNG_FIELDS_SIGINFO(info)
+ ctf_array_text(char, comm, task->comm, TASK_COMM_LEN)
+ ctf_integer(pid_t, pid, task->pid)
+ )
+)
+#endif
+
+/**
+ * signal_deliver - called when a signal is delivered
+ * @sig: signal number
+ * @info: pointer to struct siginfo
+ * @ka: pointer to struct k_sigaction
+ *
+ * A 'sig' signal is delivered to current process with 'info' siginfo,
+ * and it will be handled by 'ka'. ka->sa.sa_handler can be SIG_IGN or
+ * SIG_DFL.
+ * Note that some signals reported by signal_generate tracepoint can be
+ * lost, ignored or modified (by debugger) before hitting this tracepoint.
+ * This means, this can show which signals are actually delivered, but
+ * matching generated signals and delivered signals may not be correct.
+ */
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,20,0) || \
+ LTTNG_RHEL_KERNEL_RANGE(4,18,0,147,0,0, 4,19,0,0,0,0))
+LTTNG_TRACEPOINT_EVENT(signal_deliver,
+
+ TP_PROTO(int sig, struct kernel_siginfo *info, struct k_sigaction *ka),
+
+ TP_ARGS(sig, info, ka),
+
+ TP_FIELDS(
+ ctf_integer(int, sig, sig)
+ LTTNG_FIELDS_SIGINFO(info)
+ ctf_integer(unsigned long, sa_handler, (unsigned long) ka->sa.sa_handler)
+ ctf_integer(unsigned long, sa_flags, ka->sa.sa_flags)
+ )
+)
+#else
+LTTNG_TRACEPOINT_EVENT(signal_deliver,
+
+ TP_PROTO(int sig, struct siginfo *info, struct k_sigaction *ka),
+
+ TP_ARGS(sig, info, ka),
+
+ TP_FIELDS(
+ ctf_integer(int, sig, sig)
+ LTTNG_FIELDS_SIGINFO(info)
+ ctf_integer(unsigned long, sa_handler, (unsigned long) ka->sa.sa_handler)
+ ctf_integer(unsigned long, sa_flags, ka->sa.sa_flags)
+ )
+)
+#endif
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3,4,0))
+LTTNG_TRACEPOINT_EVENT_CLASS(signal_queue_overflow,
+
+ TP_PROTO(int sig, int group, struct siginfo *info),
+
+ TP_ARGS(sig, group, info),
+
+ TP_FIELDS(
+ ctf_integer(int, sig, sig)
+ ctf_integer(int, group, group)
+ LTTNG_FIELDS_SIGINFO(info)
+ )
+)
+
+/**
+ * signal_overflow_fail - called when signal queue is overflow
+ * @sig: signal number
+ * @group: signal to process group or not (bool)
+ * @info: pointer to struct siginfo
+ *
+ * Kernel fails to generate 'sig' signal with 'info' siginfo, because
+ * siginfo queue is overflow, and the signal is dropped.
+ * 'group' is not 0 if the signal will be sent to a process group.
+ * 'sig' is always one of RT signals.
+ */
+LTTNG_TRACEPOINT_EVENT_INSTANCE(signal_queue_overflow, signal_overflow_fail,
+
+ TP_PROTO(int sig, int group, struct siginfo *info),
+
+ TP_ARGS(sig, group, info)
+)
+
+/**
+ * signal_lose_info - called when siginfo is lost
+ * @sig: signal number
+ * @group: signal to process group or not (bool)
+ * @info: pointer to struct siginfo
+ *
+ * Kernel generates 'sig' signal but loses 'info' siginfo, because siginfo
+ * queue is overflow.
+ * 'group' is not 0 if the signal will be sent to a process group.
+ * 'sig' is always one of non-RT signals.
+ */
+LTTNG_TRACEPOINT_EVENT_INSTANCE(signal_queue_overflow, signal_lose_info,
+
+ TP_PROTO(int sig, int group, struct siginfo *info),
+
+ TP_ARGS(sig, group, info)
+)
+#endif
+
+#endif /* LTTNG_TRACE_SIGNAL_H */
+
+/* This part must be outside protection */
+#include <lttng/define_trace.h>
projects / lttng-modules.git / blobdiff