projects / lttng-modules.git / blame
| Commit | Line | Data |
|---|---|---|
| 1c8284eb MD |
1 | /* |
| 2 | * ltt/probes/trap-trace.c | |
| 3 | * | |
| 4 | * Trap tracepoint probes. | |
| 5 | * | |
| 6 | * (C) Copyright 2009 - Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> | |
| 7 | * Dual LGPL v2.1/GPL v2 license. | |
| 8 | */ | |
| 9 | ||
| 10 | #include <linux/module.h> | |
| 11 | #include <trace/trap.h> | |
| 12 | ||
| 13 | #include "../ltt-type-serializer.h" | |
| 14 | ||
| 15 | /* kernel_trap_entry specialized tracepoint probe */ | |
| 16 | ||
| 17 | void probe_trap_entry(void *_data, struct pt_regs *regs, long id); | |
| 18 | ||
| 19 | DEFINE_MARKER_TP(kernel, trap_entry, trap_entry, | |
| 20 | probe_trap_entry, "ip #p%ld trap_id #2u%u"); | |
| 21 | ||
| 22 | notrace void probe_trap_entry(void *_data, struct pt_regs *regs, long id) | |
| 23 | { | |
| 24 | struct marker *marker; | |
| 25 | struct serialize_long_short data; | |
| 26 | ||
| 27 | if (likely(regs)) | |
| 28 | data.f1 = instruction_pointer(regs); | |
| 29 | else | |
| 30 | data.f1 = 0UL; | |
| 31 | data.f2 = (unsigned short)id; | |
| 32 | ||
| 33 | marker = &GET_MARKER(kernel, trap_entry); | |
| 34 | ltt_specialized_trace(marker, marker->single.probe_private, | |
| 35 | &data, serialize_sizeof(data), sizeof(long)); | |
| 36 | } | |
| 37 | ||
| 38 | /* kernel_syscall_exit specialized tracepoint probe */ | |
| 39 | ||
| 40 | void probe_trap_exit(void *_data); | |
| 41 | ||
| 42 | DEFINE_MARKER_TP(kernel, trap_exit, trap_exit, | |
| 43 | probe_trap_exit, MARK_NOARGS); | |
| 44 | ||
| 45 | notrace void probe_trap_exit(void *_data) | |
| 46 | { | |
| 47 | struct marker *marker; | |
| 48 | ||
| 49 | marker = &GET_MARKER(kernel, trap_exit); | |
| 50 | ltt_specialized_trace(marker, marker->single.probe_private, | |
| 51 | NULL, 0, 0); | |
| 52 | } | |
| 53 | ||
| 54 | MODULE_LICENSE("GPL and additional rights"); | |
| 55 | MODULE_AUTHOR("Mathieu Desnoyers"); | |
| 56 | MODULE_DESCRIPTION("Trap Tracepoint Probes"); |