| 1 | /* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only) |
| 2 | * |
| 3 | * lttng-syscalls-exit-table.c |
| 4 | * |
| 5 | * LTTng syscall exit probes. |
| 6 | * |
| 7 | * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 8 | * Copyright (C) 2021 Francis Deslauriers <francis.deslauriers@efficios.com> |
| 9 | */ |
| 10 | |
| 11 | #include <wrapper/tracepoint.h> |
| 12 | |
| 13 | #include "lttng-syscalls.h" |
| 14 | |
| 15 | |
| 16 | #ifdef IA32_NR_syscalls |
| 17 | #define NR_compat_syscalls IA32_NR_syscalls |
| 18 | #else |
| 19 | #define NR_compat_syscalls NR_syscalls |
| 20 | #endif |
| 21 | |
| 22 | /* |
| 23 | * Create LTTng tracepoint probes. |
| 24 | */ |
| 25 | #define LTTNG_PACKAGE_BUILD |
| 26 | #define CREATE_TRACE_POINTS |
| 27 | #define TP_MODULE_NOINIT |
| 28 | #define TRACE_INCLUDE_PATH instrumentation/syscalls |
| 29 | |
| 30 | #define PARAMS(args...) args |
| 31 | |
| 32 | #define SC_EXIT |
| 33 | |
| 34 | #undef sc_in |
| 35 | #define sc_in(...) |
| 36 | #undef sc_out |
| 37 | #define sc_out(...) __VA_ARGS__ |
| 38 | #undef sc_inout |
| 39 | #define sc_inout(...) __VA_ARGS__ |
| 40 | #undef sc_exit |
| 41 | #define sc_exit(...) __VA_ARGS__ |
| 42 | |
| 43 | #define LTTNG_TRACEPOINT_TYPE_EXTERN |
| 44 | |
| 45 | #include <lttng/events-reset.h> |
| 46 | |
| 47 | /* Hijack probe callback for system call enter */ |
| 48 | #undef TP_PROBE_CB |
| 49 | #define TP_PROBE_CB(_template) &syscall_exit_event_probe |
| 50 | #define SC_LTTNG_TRACEPOINT_EVENT(_name, _proto, _args, _fields) \ |
| 51 | LTTNG_TRACEPOINT_EVENT(syscall_exit_##_name, PARAMS(_proto), PARAMS(_args), \ |
| 52 | PARAMS(_fields)) |
| 53 | #define SC_LTTNG_TRACEPOINT_EVENT_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ |
| 54 | LTTNG_TRACEPOINT_EVENT_CODE(syscall_exit_##_name, PARAMS(_proto), PARAMS(_args), \ |
| 55 | PARAMS(_locvar), PARAMS(_code_pre), \ |
| 56 | PARAMS(_fields), PARAMS(_code_post)) |
| 57 | #define SC_LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \ |
| 58 | LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(syscall_exit_##_name, PARAMS(_fields)) |
| 59 | #define SC_LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(_template, _name) \ |
| 60 | LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(syscall_exit_##_template, syscall_exit_##_name) |
| 61 | |
| 62 | #define SC_LTTNG_TRACEPOINT_ENUM(_name, _values) \ |
| 63 | LTTNG_TRACEPOINT_ENUM(_name, PARAMS(_values)) |
| 64 | #undef TRACE_SYSTEM |
| 65 | #define TRACE_SYSTEM syscall_exit_integers |
| 66 | #define TRACE_INCLUDE_FILE syscalls_integers |
| 67 | #include <instrumentation/syscalls/syscalls_integers.h> |
| 68 | #undef TRACE_INCLUDE_FILE |
| 69 | #undef TRACE_SYSTEM |
| 70 | #define TRACE_SYSTEM syscall_exit_pointers |
| 71 | #define TRACE_INCLUDE_FILE syscalls_pointers |
| 72 | #include <instrumentation/syscalls/syscalls_pointers.h> |
| 73 | #undef TRACE_INCLUDE_FILE |
| 74 | #undef TRACE_SYSTEM |
| 75 | #undef SC_LTTNG_TRACEPOINT_ENUM |
| 76 | #undef SC_LTTNG_TRACEPOINT_EVENT_CODE |
| 77 | #undef SC_LTTNG_TRACEPOINT_EVENT |
| 78 | #undef SC_LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS |
| 79 | #undef SC_LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS |
| 80 | #undef TP_PROBE_CB |
| 81 | #undef _TRACE_SYSCALLS_INTEGERS_H |
| 82 | #undef _TRACE_SYSCALLS_POINTERS_H |
| 83 | |
| 84 | #define CREATE_SYSCALL_TABLE |
| 85 | |
| 86 | #undef sc_exit |
| 87 | #define sc_exit(...) |
| 88 | |
| 89 | #undef TRACE_SYSCALL_TABLE |
| 90 | #define TRACE_SYSCALL_TABLE(_template, _name, _nr, _nrargs) \ |
| 91 | [ _nr ] = { \ |
| 92 | .event_func = __event_probe__syscall_exit_##_template, \ |
| 93 | .nrargs = (_nrargs), \ |
| 94 | .fields = __event_fields___syscall_exit_##_template, \ |
| 95 | .desc = &__event_desc___syscall_exit_##_name, \ |
| 96 | }, |
| 97 | |
| 98 | /* Event syscall enter tracing table */ |
| 99 | static const struct trace_syscall_entry _sc_exit_table[] = { |
| 100 | #include <instrumentation/syscalls/syscalls_integers.h> |
| 101 | #include <instrumentation/syscalls/syscalls_pointers.h> |
| 102 | }; |
| 103 | |
| 104 | const struct trace_syscall_table sc_exit_table = { |
| 105 | .table = _sc_exit_table, |
| 106 | .len = ARRAY_SIZE(_sc_exit_table), |
| 107 | }; |
| 108 | #undef SC_EXIT |
| 109 | |
| 110 | #undef CREATE_SYSCALL_TABLE |