X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=lttng-syscalls.c;h=fb14f6b043a877a77176e94a5ff3926a4b180b07;hb=9143c6d5444e809b9d411c07a8dae94c151668ae;hp=806485f0753712a544f068ddfb5033b68fc9c8bb;hpb=265822ae7c567f883f17d89316b5540eb4447d6f;p=lttng-modules.git diff --git a/lttng-syscalls.c b/lttng-syscalls.c index 806485f0..fb14f6b0 100644 --- a/lttng-syscalls.c +++ b/lttng-syscalls.c @@ -1,23 +1,10 @@ -/* +/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1) + * * lttng-syscalls.c * * LTTng syscall probes. * * Copyright (C) 2010-2012 Mathieu Desnoyers - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; only - * version 2.1 of the License. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include @@ -34,11 +21,12 @@ #include #include -#include "lib/bitfield.h" -#include "wrapper/tracepoint.h" -#include "wrapper/file.h" -#include "wrapper/rcu.h" -#include "lttng-events.h" +#include +#include +#include +#include +#include +#include #ifndef CONFIG_COMPAT # ifndef is_compat_task @@ -46,6 +34,11 @@ # endif #endif +/* in_compat_syscall appears in kernel 4.6. */ +#ifndef in_compat_syscall + #define in_compat_syscall() is_compat_task() +#endif + enum sc_type { SC_TYPE_ENTRY, SC_TYPE_EXIT, @@ -78,6 +71,19 @@ struct old_utsname; struct sel_arg_struct; struct mmap_arg_struct; struct file_handle; +struct user_msghdr; + +/* + * Forward declaration for kernels >= 5.6 + */ +struct timex; +struct timeval; +struct itimerval; +struct itimerspec; + +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,6,0)) +typedef __kernel_old_time_t time_t; +#endif #ifdef IA32_NR_syscalls #define NR_compat_syscalls IA32_NR_syscalls @@ -91,14 +97,14 @@ struct file_handle; #define LTTNG_PACKAGE_BUILD #define CREATE_TRACE_POINTS #define TP_MODULE_NOINIT -#define TRACE_INCLUDE_PATH ../instrumentation/syscalls/headers +#define TRACE_INCLUDE_PATH instrumentation/syscalls/headers #define PARAMS(args...) args /* Handle unknown syscalls */ #undef TRACE_SYSTEM #define TRACE_SYSTEM syscalls_unknown -#include "instrumentation/syscalls/headers/syscalls_unknown.h" +#include #undef TRACE_SYSTEM #define SC_ENTER @@ -126,17 +132,21 @@ struct file_handle; LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(syscall_entry_##_name, PARAMS(_fields)) #define SC_LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(_template, _name) \ LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(syscall_entry_##_template, syscall_entry_##_name) +/* Enumerations only defined at first inclusion. */ +#define SC_LTTNG_TRACEPOINT_ENUM(_name, _values) \ + LTTNG_TRACEPOINT_ENUM(_name, PARAMS(_values)) #undef TRACE_SYSTEM #define TRACE_SYSTEM syscall_entry_integers #define TRACE_INCLUDE_FILE syscalls_integers -#include "instrumentation/syscalls/headers/syscalls_integers.h" +#include #undef TRACE_INCLUDE_FILE #undef TRACE_SYSTEM #define TRACE_SYSTEM syscall_entry_pointers #define TRACE_INCLUDE_FILE syscalls_pointers -#include "instrumentation/syscalls/headers/syscalls_pointers.h" +#include #undef TRACE_INCLUDE_FILE #undef TRACE_SYSTEM +#undef SC_LTTNG_TRACEPOINT_ENUM #undef SC_LTTNG_TRACEPOINT_EVENT_CODE #undef SC_LTTNG_TRACEPOINT_EVENT #undef SC_LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS @@ -147,6 +157,7 @@ struct file_handle; /* Hijack probe callback for compat system call enter */ #define TP_PROBE_CB(_template) &syscall_entry_probe +#define LTTNG_SC_COMPAT #define SC_LTTNG_TRACEPOINT_EVENT(_name, _proto, _args, _fields) \ LTTNG_TRACEPOINT_EVENT(compat_syscall_entry_##_name, PARAMS(_proto), PARAMS(_args), \ PARAMS(_fields)) @@ -158,16 +169,19 @@ struct file_handle; #define SC_LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(_template, _name) \ LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(compat_syscall_entry_##_template, \ compat_syscall_entry_##_name) +/* Enumerations only defined at inital inclusion (not here). */ +#define SC_LTTNG_TRACEPOINT_ENUM(_name, _values) #define TRACE_SYSTEM compat_syscall_entry_integers #define TRACE_INCLUDE_FILE compat_syscalls_integers -#include "instrumentation/syscalls/headers/compat_syscalls_integers.h" +#include #undef TRACE_INCLUDE_FILE #undef TRACE_SYSTEM #define TRACE_SYSTEM compat_syscall_entry_pointers #define TRACE_INCLUDE_FILE compat_syscalls_pointers -#include "instrumentation/syscalls/headers/compat_syscalls_pointers.h" +#include #undef TRACE_INCLUDE_FILE #undef TRACE_SYSTEM +#undef SC_LTTNG_TRACEPOINT_ENUM #undef SC_LTTNG_TRACEPOINT_EVENT_CODE #undef SC_LTTNG_TRACEPOINT_EVENT #undef SC_LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS @@ -175,6 +189,7 @@ struct file_handle; #undef TP_PROBE_CB #undef _TRACE_SYSCALLS_INTEGERS_H #undef _TRACE_SYSCALLS_POINTERS_H +#undef LTTNG_SC_COMPAT #undef SC_ENTER @@ -202,16 +217,19 @@ struct file_handle; #define SC_LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(_template, _name) \ LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(syscall_exit_##_template, \ syscall_exit_##_name) +/* Enumerations only defined at inital inclusion (not here). */ +#define SC_LTTNG_TRACEPOINT_ENUM(_name, _values) #define TRACE_SYSTEM syscall_exit_integers #define TRACE_INCLUDE_FILE syscalls_integers -#include "instrumentation/syscalls/headers/syscalls_integers.h" +#include #undef TRACE_INCLUDE_FILE #undef TRACE_SYSTEM #define TRACE_SYSTEM syscall_exit_pointers #define TRACE_INCLUDE_FILE syscalls_pointers -#include "instrumentation/syscalls/headers/syscalls_pointers.h" +#include #undef TRACE_INCLUDE_FILE #undef TRACE_SYSTEM +#undef SC_LTTNG_TRACEPOINT_ENUM #undef SC_LTTNG_TRACEPOINT_EVENT_CODE #undef SC_LTTNG_TRACEPOINT_EVENT #undef SC_LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS @@ -223,6 +241,7 @@ struct file_handle; /* Hijack probe callback for compat system call exit */ #define TP_PROBE_CB(_template) &syscall_exit_probe +#define LTTNG_SC_COMPAT #define SC_LTTNG_TRACEPOINT_EVENT(_name, _proto, _args, _fields) \ LTTNG_TRACEPOINT_EVENT(compat_syscall_exit_##_name, PARAMS(_proto), PARAMS(_args), \ PARAMS(_fields)) @@ -234,16 +253,19 @@ struct file_handle; #define SC_LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(_template, _name) \ LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(compat_syscall_exit_##_template, \ compat_syscall_exit_##_name) +/* Enumerations only defined at inital inclusion (not here). */ +#define SC_LTTNG_TRACEPOINT_ENUM(_name, _values) #define TRACE_SYSTEM compat_syscall_exit_integers #define TRACE_INCLUDE_FILE compat_syscalls_integers -#include "instrumentation/syscalls/headers/compat_syscalls_integers.h" +#include #undef TRACE_INCLUDE_FILE #undef TRACE_SYSTEM #define TRACE_SYSTEM compat_syscall_exit_pointers #define TRACE_INCLUDE_FILE compat_syscalls_pointers -#include "instrumentation/syscalls/headers/compat_syscalls_pointers.h" +#include #undef TRACE_INCLUDE_FILE #undef TRACE_SYSTEM +#undef SC_LTTNG_TRACEPOINT_ENUM #undef SC_LTTNG_TRACEPOINT_EVENT_CODE #undef SC_LTTNG_TRACEPOINT_EVENT #undef SC_LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS @@ -251,6 +273,7 @@ struct file_handle; #undef TP_PROBE_CB #undef _TRACE_SYSCALLS_INTEGERS_H #undef _TRACE_SYSCALLS_POINTERS_H +#undef LTTNG_SC_COMPAT #undef SC_EXIT @@ -283,8 +306,8 @@ struct trace_syscall_entry { /* Syscall enter tracing table */ static const struct trace_syscall_entry sc_table[] = { -#include "instrumentation/syscalls/headers/syscalls_integers.h" -#include "instrumentation/syscalls/headers/syscalls_pointers.h" +#include +#include }; #undef TRACE_SYSCALL_TABLE @@ -298,8 +321,8 @@ static const struct trace_syscall_entry sc_table[] = { /* Compat syscall enter table */ const struct trace_syscall_entry compat_sc_table[] = { -#include "instrumentation/syscalls/headers/compat_syscalls_integers.h" -#include "instrumentation/syscalls/headers/compat_syscalls_pointers.h" +#include +#include }; #undef SC_ENTER @@ -320,8 +343,8 @@ const struct trace_syscall_entry compat_sc_table[] = { /* Syscall exit table */ static const struct trace_syscall_entry sc_exit_table[] = { -#include "instrumentation/syscalls/headers/syscalls_integers.h" -#include "instrumentation/syscalls/headers/syscalls_pointers.h" +#include +#include }; #undef TRACE_SYSCALL_TABLE @@ -335,8 +358,8 @@ static const struct trace_syscall_entry sc_exit_table[] = { /* Compat syscall exit table */ const struct trace_syscall_entry compat_sc_exit_table[] = { -#include "instrumentation/syscalls/headers/compat_syscalls_integers.h" -#include "instrumentation/syscalls/headers/compat_syscalls_pointers.h" +#include +#include }; #undef SC_EXIT @@ -351,10 +374,10 @@ struct lttng_syscall_filter { static void syscall_entry_unknown(struct lttng_event *event, struct pt_regs *regs, unsigned int id) { - unsigned long args[UNKNOWN_SYSCALL_NRARGS]; + unsigned long args[LTTNG_SYSCALL_NR_ARGS]; - syscall_get_arguments(current, regs, 0, UNKNOWN_SYSCALL_NRARGS, args); - if (unlikely(is_compat_task())) + lttng_syscall_get_arguments(current, regs, args); + if (unlikely(in_compat_syscall())) __event_probe__compat_syscall_entry_unknown(event, id, args); else __event_probe__syscall_entry_unknown(event, id, args); @@ -367,7 +390,7 @@ void syscall_entry_probe(void *__data, struct pt_regs *regs, long id) const struct trace_syscall_entry *table, *entry; size_t table_len; - if (unlikely(is_compat_task())) { + if (unlikely(in_compat_syscall())) { struct lttng_syscall_filter *filter; filter = lttng_rcu_dereference(chan->sc_filter); @@ -400,7 +423,7 @@ void syscall_entry_probe(void *__data, struct pt_regs *regs, long id) syscall_entry_unknown(unknown_event, regs, id); return; } - if (unlikely(is_compat_task())) + if (unlikely(in_compat_syscall())) event = chan->compat_sc_table[id]; else event = chan->sc_table[id]; @@ -422,9 +445,9 @@ void syscall_entry_probe(void *__data, struct pt_regs *regs, long id) case 1: { void (*fptr)(void *__data, unsigned long arg0) = entry->func; - unsigned long args[1]; + unsigned long args[LTTNG_SYSCALL_NR_ARGS]; - syscall_get_arguments(current, regs, 0, entry->nrargs, args); + lttng_syscall_get_arguments(current, regs, args); fptr(event, args[0]); break; } @@ -433,9 +456,9 @@ void syscall_entry_probe(void *__data, struct pt_regs *regs, long id) void (*fptr)(void *__data, unsigned long arg0, unsigned long arg1) = entry->func; - unsigned long args[2]; + unsigned long args[LTTNG_SYSCALL_NR_ARGS]; - syscall_get_arguments(current, regs, 0, entry->nrargs, args); + lttng_syscall_get_arguments(current, regs, args); fptr(event, args[0], args[1]); break; } @@ -445,9 +468,9 @@ void syscall_entry_probe(void *__data, struct pt_regs *regs, long id) unsigned long arg0, unsigned long arg1, unsigned long arg2) = entry->func; - unsigned long args[3]; + unsigned long args[LTTNG_SYSCALL_NR_ARGS]; - syscall_get_arguments(current, regs, 0, entry->nrargs, args); + lttng_syscall_get_arguments(current, regs, args); fptr(event, args[0], args[1], args[2]); break; } @@ -458,9 +481,9 @@ void syscall_entry_probe(void *__data, struct pt_regs *regs, long id) unsigned long arg1, unsigned long arg2, unsigned long arg3) = entry->func; - unsigned long args[4]; + unsigned long args[LTTNG_SYSCALL_NR_ARGS]; - syscall_get_arguments(current, regs, 0, entry->nrargs, args); + lttng_syscall_get_arguments(current, regs, args); fptr(event, args[0], args[1], args[2], args[3]); break; } @@ -472,9 +495,9 @@ void syscall_entry_probe(void *__data, struct pt_regs *regs, long id) unsigned long arg2, unsigned long arg3, unsigned long arg4) = entry->func; - unsigned long args[5]; + unsigned long args[LTTNG_SYSCALL_NR_ARGS]; - syscall_get_arguments(current, regs, 0, entry->nrargs, args); + lttng_syscall_get_arguments(current, regs, args); fptr(event, args[0], args[1], args[2], args[3], args[4]); break; } @@ -487,9 +510,9 @@ void syscall_entry_probe(void *__data, struct pt_regs *regs, long id) unsigned long arg3, unsigned long arg4, unsigned long arg5) = entry->func; - unsigned long args[6]; + unsigned long args[LTTNG_SYSCALL_NR_ARGS]; - syscall_get_arguments(current, regs, 0, entry->nrargs, args); + lttng_syscall_get_arguments(current, regs, args); fptr(event, args[0], args[1], args[2], args[3], args[4], args[5]); break; @@ -502,10 +525,10 @@ void syscall_entry_probe(void *__data, struct pt_regs *regs, long id) static void syscall_exit_unknown(struct lttng_event *event, struct pt_regs *regs, int id, long ret) { - unsigned long args[UNKNOWN_SYSCALL_NRARGS]; + unsigned long args[LTTNG_SYSCALL_NR_ARGS]; - syscall_get_arguments(current, regs, 0, UNKNOWN_SYSCALL_NRARGS, args); - if (unlikely(is_compat_task())) + lttng_syscall_get_arguments(current, regs, args); + if (unlikely(in_compat_syscall())) __event_probe__compat_syscall_exit_unknown(event, id, ret, args); else @@ -521,7 +544,7 @@ void syscall_exit_probe(void *__data, struct pt_regs *regs, long ret) long id; id = syscall_get_nr(current, regs); - if (unlikely(is_compat_task())) { + if (unlikely(in_compat_syscall())) { struct lttng_syscall_filter *filter; filter = lttng_rcu_dereference(chan->sc_filter); @@ -554,7 +577,7 @@ void syscall_exit_probe(void *__data, struct pt_regs *regs, long ret) syscall_exit_unknown(unknown_event, regs, id, ret); return; } - if (unlikely(is_compat_task())) + if (unlikely(in_compat_syscall())) event = chan->compat_sc_exit_table[id]; else event = chan->sc_exit_table[id]; @@ -578,9 +601,9 @@ void syscall_exit_probe(void *__data, struct pt_regs *regs, long ret) void (*fptr)(void *__data, long ret, unsigned long arg0) = entry->func; - unsigned long args[1]; + unsigned long args[LTTNG_SYSCALL_NR_ARGS]; - syscall_get_arguments(current, regs, 0, entry->nrargs, args); + lttng_syscall_get_arguments(current, regs, args); fptr(event, ret, args[0]); break; } @@ -590,9 +613,9 @@ void syscall_exit_probe(void *__data, struct pt_regs *regs, long ret) long ret, unsigned long arg0, unsigned long arg1) = entry->func; - unsigned long args[2]; + unsigned long args[LTTNG_SYSCALL_NR_ARGS]; - syscall_get_arguments(current, regs, 0, entry->nrargs, args); + lttng_syscall_get_arguments(current, regs, args); fptr(event, ret, args[0], args[1]); break; } @@ -603,9 +626,9 @@ void syscall_exit_probe(void *__data, struct pt_regs *regs, long ret) unsigned long arg0, unsigned long arg1, unsigned long arg2) = entry->func; - unsigned long args[3]; + unsigned long args[LTTNG_SYSCALL_NR_ARGS]; - syscall_get_arguments(current, regs, 0, entry->nrargs, args); + lttng_syscall_get_arguments(current, regs, args); fptr(event, ret, args[0], args[1], args[2]); break; } @@ -617,9 +640,9 @@ void syscall_exit_probe(void *__data, struct pt_regs *regs, long ret) unsigned long arg1, unsigned long arg2, unsigned long arg3) = entry->func; - unsigned long args[4]; + unsigned long args[LTTNG_SYSCALL_NR_ARGS]; - syscall_get_arguments(current, regs, 0, entry->nrargs, args); + lttng_syscall_get_arguments(current, regs, args); fptr(event, ret, args[0], args[1], args[2], args[3]); break; } @@ -632,9 +655,9 @@ void syscall_exit_probe(void *__data, struct pt_regs *regs, long ret) unsigned long arg2, unsigned long arg3, unsigned long arg4) = entry->func; - unsigned long args[5]; + unsigned long args[LTTNG_SYSCALL_NR_ARGS]; - syscall_get_arguments(current, regs, 0, entry->nrargs, args); + lttng_syscall_get_arguments(current, regs, args); fptr(event, ret, args[0], args[1], args[2], args[3], args[4]); break; } @@ -648,9 +671,9 @@ void syscall_exit_probe(void *__data, struct pt_regs *regs, long ret) unsigned long arg3, unsigned long arg4, unsigned long arg5) = entry->func; - unsigned long args[6]; + unsigned long args[LTTNG_SYSCALL_NR_ARGS]; - syscall_get_arguments(current, regs, 0, entry->nrargs, args); + lttng_syscall_get_arguments(current, regs, args); fptr(event, ret, args[0], args[1], args[2], args[3], args[4], args[5]); break; @@ -894,15 +917,15 @@ int lttng_syscalls_unregister(struct lttng_channel *chan) if (!chan->sc_table) return 0; if (chan->sys_enter_registered) { - ret = lttng_wrapper_tracepoint_probe_unregister("sys_exit", - (void *) syscall_exit_probe, chan); + ret = lttng_wrapper_tracepoint_probe_unregister("sys_enter", + (void *) syscall_entry_probe, chan); if (ret) return ret; chan->sys_enter_registered = 0; } if (chan->sys_exit_registered) { - ret = lttng_wrapper_tracepoint_probe_unregister("sys_enter", - (void *) syscall_entry_probe, chan); + ret = lttng_wrapper_tracepoint_probe_unregister("sys_exit", + (void *) syscall_exit_probe, chan); if (ret) return ret; chan->sys_exit_registered = 0; @@ -1236,7 +1259,7 @@ long lttng_channel_syscall_mask(struct lttng_channel *channel, filter = channel->sc_filter; for (bit = 0; bit < ARRAY_SIZE(sc_table); bit++) { - bool state; + char state; if (channel->sc_table) { if (filter) @@ -1249,7 +1272,7 @@ long lttng_channel_syscall_mask(struct lttng_channel *channel, bt_bitfield_write_be(tmp_mask, char, bit, 1, state); } for (; bit < sc_tables_len; bit++) { - bool state; + char state; if (channel->compat_sc_table) { if (filter)