Extract the payload for epoll_ctl

[lttng-modules.git] / instrumentation / syscalls / headers / syscalls_pointers_override.h

diff --git a/instrumentation/syscalls/headers/syscalls_pointers_override.h b/instrumentation/syscalls/headers/syscalls_pointers_override.h
index 1a2695e197ba2ae952942f7f206a6f2e780956fb..97ea9a5ce33d521e398789a3cb81defaafd653f7 100644 (file)
--- a/instrumentation/syscalls/headers/syscalls_pointers_override.h
+++ b/instrumentation/syscalls/headers/syscalls_pointers_override.h
@@ -553,4 +553,144 @@ SC_LTTNG_TRACEPOINT_EVENT_CODE(ppoll,
 )
 #endif /* defined(CONFIG_X86_32) || defined(CONFIG_X86_64) || defined(CONFIG_ARM64) || defined(CONFIG_ARM) */
 
+#include <linux/eventpoll.h>
+
+SC_LTTNG_TRACEPOINT_ENUM(lttng_epoll_op,
+       TP_ENUM_VALUES(
+               ctf_enum_value("EPOLL_CTL_ADD", EPOLL_CTL_ADD)
+               ctf_enum_value("EPOLL_CTL_DEL", EPOLL_CTL_DEL)
+               ctf_enum_value("EPOLL_CTL_MOD", EPOLL_CTL_MOD)
+       )
+)
+
+#ifndef ONCE_LTTNG_TRACE_EPOLL_CTL_H
+#define ONCE_LTTNG_TRACE_EPOLL_CTL_H
+
+#define LTTNG_EPOLL_NRFLAGS (POLLHUP + 1)
+#define EPOLL_FLAGS_PADDING_SIZE (sizeof(uint8_t) * BITS_PER_BYTE) - \
+       ilog2(LTTNG_EPOLL_NRFLAGS - 1)
+
+/*
+ * Only extract the values specified by iBCS2 for now.
+ */
+static struct lttng_event_field lttng_epoll_ctl_events_fields[] = {
+       /* 0x0001 */
+       [ilog2(POLLIN)] = {
+               .name = "EPOLLIN",
+               .type = __type_integer(int, 1, 1, 0, __LITTLE_ENDIAN, 10, none),
+       },
+       /* 0x0002 */
+       [ilog2(POLLPRI)] = {
+               .name = "EPOLLPRI",
+               .type = __type_integer(int, 1, 1, 0, __LITTLE_ENDIAN, 10, none),
+       },
+       /* 0x0004 */
+       [ilog2(POLLOUT)] = {
+               .name = "EPOLLOUT",
+               .type = __type_integer(int, 1, 1, 0, __LITTLE_ENDIAN, 10, none),
+       },
+       /* 0x0008 */
+       [ilog2(POLLERR)] = {
+               .name = "EPOLLERR",
+               .type = __type_integer(int, 1, 1, 0, __LITTLE_ENDIAN, 10, none),
+       },
+       /* 0x0010 */
+       [ilog2(POLLHUP)] = {
+               .name = "EPOLLHUP",
+               .type = __type_integer(int, 1, 1, 0, __LITTLE_ENDIAN, 10, none),
+       },
+       [ilog2(LTTNG_EPOLL_NRFLAGS)] = {
+               .name = "padding",
+               .type = __type_integer(int, EPOLL_FLAGS_PADDING_SIZE, 1, 0,
+                               __LITTLE_ENDIAN, 10, none),
+       },
+
+};
+
+static struct lttng_event_field lttng_epoll_data_fields[] = {
+       [0] = {
+               .name = "u64",
+               .type = __type_integer(uint64_t, 0, 0, 0, __BYTE_ORDER, 16, none),
+       },
+       [1] = {
+               .name = "fd",
+               .type = __type_integer(int, 0, 0, 0, __BYTE_ORDER, 10, none),
+       },
+};
+
+static struct lttng_event_field epoll_ctl_fields[] = {
+       [0] = {
+               .name = "data_union",
+               .type = {
+                       .atype = atype_struct,
+                       .u._struct.nr_fields = ARRAY_SIZE(lttng_epoll_data_fields),
+                       .u._struct.fields = lttng_epoll_data_fields,
+               }
+       },
+       [1] = {
+               .name = "raw_events",
+               .type = __type_integer(uint32_t, 0, 0, 0, __BYTE_ORDER, 16, none),
+       },
+       [2] = {
+               .name = "events",
+               .type = {
+                       .atype = atype_struct,
+                       .u._struct.nr_fields = ARRAY_SIZE(lttng_epoll_ctl_events_fields),
+                       .u._struct.fields = lttng_epoll_ctl_events_fields,
+               }
+       },
+};
+#endif /* ONCE_LTTNG_TRACE_EPOLL_CTL_H */
+
+#if defined(CONFIG_X86_32) || defined(CONFIG_X86_64) || defined(CONFIG_ARM64) || defined(CONFIG_ARM)
+#define OVERRIDE_32_epoll_ctl
+#define OVERRIDE_64_epoll_ctl
+SC_LTTNG_TRACEPOINT_EVENT_CODE(epoll_ctl,
+       TP_PROTO(sc_exit(long ret,) int epfd, int op, int fd,
+               struct epoll_event __user * uevent),
+       TP_ARGS(sc_exit(ret,) epfd, op, fd, uevent),
+       TP_locvar(
+               struct epoll_event event;
+               int err;
+       ),
+       TP_code_pre(
+               tp_locvar->err = lib_ring_buffer_copy_from_user_check_nofault(
+                       &tp_locvar->event, uevent, sizeof(struct epoll_event));
+               ),
+       TP_FIELDS(
+               sc_exit(ctf_integer(long, ret, ret))
+               sc_in(ctf_integer(int, epfd, epfd))
+               sc_in(ctf_enum(lttng_epoll_op, int, op_enum, op))
+               sc_in(ctf_integer(int, fd, fd))
+               sc_in(
+                       ctf_custom_field(
+                               ctf_custom_type(
+                                       .atype = atype_struct,
+                                       .u._struct.nr_fields = ARRAY_SIZE(epoll_ctl_fields),
+                                       .u._struct.fields = epoll_ctl_fields,
+                               ),
+                               event,
+                               ctf_custom_code(
+                                       ctf_align(uint64_t)
+                                       if (!tp_locvar->err) {
+                                               ctf_integer_type(uint64_t, tp_locvar->event.data)
+                                               ctf_integer_type(int, tp_locvar->event.data)
+                                               ctf_integer_bitfield_type(uint32_t,
+                                                       tp_locvar->event.events)
+                                               ctf_integer_bitfield_type(uint8_t,
+                                                       (uint8_t) tp_locvar->event.events)
+                                       } else {
+                                               ctf_integer_type(uint64_t, 0)
+                                               ctf_integer_type(int, 0)
+                                               ctf_integer_bitfield_type(uint32_t, 0)
+                                               ctf_integer_bitfield_type(uint8_t, 0)
+                                       }
+                               )
+                       )
+               )
+       ),
+       TP_code_post()
+)
+#endif /* defined(CONFIG_X86_32) || defined(CONFIG_X86_64) || defined(CONFIG_ARM64) || defined(CONFIG_ARM) */
+
 #endif /* CREATE_SYSCALL_TABLE */