From: Mathieu Desnoyers Date: Fri, 9 Oct 2015 14:02:37 +0000 (-0400) Subject: Tracepoint event: add "TP_code_post()" X-Git-Tag: v2.8.0-rc1~66 X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=265822ae7c567f883f17d89316b5540eb4447d6f;p=lttng-modules.git Tracepoint event: add "TP_code_post()" Useful for probes that need to perform teardown after serialization, e.g. allocate temporary memory in TP_code_pre() and free it in TP_code_post(). Be careful to only use memory allocation from contexts allowing it. Signed-off-by: Mathieu Desnoyers --- diff --git a/instrumentation/events/lttng-module/arch/x86/kvm/trace.h b/instrumentation/events/lttng-module/arch/x86/kvm/trace.h index 32c4743e..c3662671 100644 --- a/instrumentation/events/lttng-module/arch/x86/kvm/trace.h +++ b/instrumentation/events/lttng-module/arch/x86/kvm/trace.h @@ -122,7 +122,7 @@ LTTNG_TRACEPOINT_EVENT_CODE(kvm_exit, u64 info1, info2; ), - TP_code( + TP_code_pre( kvm_x86_ops->get_exit_info(vcpu, &tp_locvar->info1, &tp_locvar->info2); ), @@ -133,7 +133,9 @@ LTTNG_TRACEPOINT_EVENT_CODE(kvm_exit, ctf_integer(u32, isa, isa) ctf_integer(u64, info1, tp_locvar->info1) ctf_integer(u64, info2, tp_locvar->info2) - ) + ), + + TP_code_post() ) /* diff --git a/instrumentation/events/lttng-module/block.h b/instrumentation/events/lttng-module/block.h index 3505df08..1a2ba6b4 100644 --- a/instrumentation/events/lttng-module/block.h +++ b/instrumentation/events/lttng-module/block.h @@ -135,7 +135,7 @@ LTTNG_TRACEPOINT_EVENT_CLASS_CODE(block_rq_with_error, size_t cmd_len; ), - TP_code( + TP_code_pre( if (rq->cmd_type == REQ_TYPE_BLOCK_PC) { tp_locvar->sector = 0; tp_locvar->nr_sector = 0; @@ -159,7 +159,9 @@ LTTNG_TRACEPOINT_EVENT_CLASS_CODE(block_rq_with_error, rq->cmd_flags, blk_rq_bytes(rq)) ctf_sequence_hex(unsigned char, cmd, tp_locvar->cmd, size_t, tp_locvar->cmd_len) - ) + ), + + TP_code_post() ) /** @@ -227,7 +229,7 @@ LTTNG_TRACEPOINT_EVENT_CODE(block_rq_complete, size_t cmd_len; ), - TP_code( + TP_code_pre( if (rq->cmd_type == REQ_TYPE_BLOCK_PC) { tp_locvar->cmd = rq->cmd; tp_locvar->cmd_len = rq->cmd_len; @@ -247,7 +249,9 @@ LTTNG_TRACEPOINT_EVENT_CODE(block_rq_complete, rq->cmd_flags, nr_bytes) ctf_sequence_hex(unsigned char, cmd, tp_locvar->cmd, size_t, tp_locvar->cmd_len) - ) + ), + + TP_code_post() ) #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,15,0)) */ @@ -286,7 +290,7 @@ LTTNG_TRACEPOINT_EVENT_CLASS_CODE(block_rq, size_t cmd_len; ), - TP_code( + TP_code_pre( if (rq->cmd_type == REQ_TYPE_BLOCK_PC) { tp_locvar->sector = 0; tp_locvar->nr_sector = 0; @@ -314,7 +318,9 @@ LTTNG_TRACEPOINT_EVENT_CLASS_CODE(block_rq, ctf_sequence_hex(unsigned char, cmd, tp_locvar->cmd, size_t, tp_locvar->cmd_len) ctf_array_text(char, comm, current->comm, TASK_COMM_LEN) - ) + ), + + TP_code_post() ) /** diff --git a/instrumentation/events/lttng-module/compaction.h b/instrumentation/events/lttng-module/compaction.h index 2c258467..771da7db 100644 --- a/instrumentation/events/lttng-module/compaction.h +++ b/instrumentation/events/lttng-module/compaction.h @@ -114,7 +114,7 @@ LTTNG_TRACEPOINT_EVENT_CODE_MAP(mm_compaction_migratepages, unsigned long nr_failed; ), - TP_code( + TP_code_pre( tp_locvar->nr_failed = 0; { @@ -131,7 +131,9 @@ LTTNG_TRACEPOINT_EVENT_CODE_MAP(mm_compaction_migratepages, TP_FIELDS( ctf_integer(unsigned long, nr_migrated, nr_all - tp_locvar->nr_failed) ctf_integer(unsigned long, nr_failed, tp_locvar->nr_failed) - ) + ), + + TP_code_post() ) #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,16,0)) */ LTTNG_TRACEPOINT_EVENT_MAP(mm_compaction_migratepages, diff --git a/instrumentation/events/lttng-module/sched.h b/instrumentation/events/lttng-module/sched.h index 2efff161..dc303988 100644 --- a/instrumentation/events/lttng-module/sched.h +++ b/instrumentation/events/lttng-module/sched.h @@ -349,7 +349,7 @@ LTTNG_TRACEPOINT_EVENT_CODE(sched_process_fork, unsigned int ns_level; ), - TP_code( + TP_code_pre( if (child) { struct pid *child_pid; unsigned int i; @@ -403,7 +403,9 @@ LTTNG_TRACEPOINT_EVENT_CODE(sched_process_fork, child_ns_inum; })) #endif - ) + ), + + TP_code_post() ) #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,33)) diff --git a/instrumentation/syscalls/headers/x86-64-syscalls-3.10.0-rc7_pointers_override.h b/instrumentation/syscalls/headers/x86-64-syscalls-3.10.0-rc7_pointers_override.h index 702cfb5d..837991a6 100644 --- a/instrumentation/syscalls/headers/x86-64-syscalls-3.10.0-rc7_pointers_override.h +++ b/instrumentation/syscalls/headers/x86-64-syscalls-3.10.0-rc7_pointers_override.h @@ -11,7 +11,7 @@ SC_LTTNG_TRACEPOINT_EVENT_CODE(connect, uint16_t v6addr[8]; unsigned int v4addr_len, v6addr_len; ), - TP_code( + TP_code_pre( sc_in( memset(tp_locvar, 0, sizeof(*tp_locvar)); if (addrlen < sizeof(struct sockaddr)) @@ -48,7 +48,8 @@ SC_LTTNG_TRACEPOINT_EVENT_CODE(connect, sc_in(ctf_integer_network(uint16_t, dport, tp_locvar->dport)) sc_in(ctf_sequence_network(uint8_t, v4addr, &tp_locvar->v4addr, unsigned int, tp_locvar->v4addr_len)) sc_in(ctf_sequence_network(uint16_t, v6addr, &tp_locvar->v6addr, unsigned int, tp_locvar->v6addr_len)) - ) + ), + TP_code_post() ) #define OVERRIDE_64_accept @@ -63,7 +64,7 @@ SC_LTTNG_TRACEPOINT_EVENT_CODE(accept, int v4addr_len, v6addr_len; int uaddr_len; ), - TP_code( + TP_code_pre( sc_inout( memset(tp_locvar, 0, sizeof(*tp_locvar)); (void) get_user(tp_locvar->uaddr_len, upeer_addrlen); @@ -103,7 +104,8 @@ SC_LTTNG_TRACEPOINT_EVENT_CODE(accept, sc_out(ctf_integer_network(uint16_t, sport, tp_locvar->sport)) sc_in(ctf_sequence_network(uint8_t, v4addr, &tp_locvar->v4addr, unsigned int, tp_locvar->v4addr_len)) sc_in(ctf_sequence_network(uint16_t, v6addr, &tp_locvar->v6addr, unsigned int, tp_locvar->v6addr_len)) - ) + ), + TP_code_post() ) #define OVERRIDE_64_pipe diff --git a/lttng-syscalls.c b/lttng-syscalls.c index 5fa66660..806485f0 100644 --- a/lttng-syscalls.c +++ b/lttng-syscalls.c @@ -118,10 +118,10 @@ struct file_handle; #define SC_LTTNG_TRACEPOINT_EVENT(_name, _proto, _args, _fields) \ LTTNG_TRACEPOINT_EVENT(syscall_entry_##_name, PARAMS(_proto), PARAMS(_args), \ PARAMS(_fields)) -#define SC_LTTNG_TRACEPOINT_EVENT_CODE(_name, _proto, _args, _locvar, _code, _fields) \ +#define SC_LTTNG_TRACEPOINT_EVENT_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ LTTNG_TRACEPOINT_EVENT_CODE(syscall_entry_##_name, PARAMS(_proto), PARAMS(_args), \ - PARAMS(_locvar), PARAMS(_code), \ - PARAMS(_fields)) + PARAMS(_locvar), PARAMS(_code_pre), \ + PARAMS(_fields), PARAMS(_code_post)) #define SC_LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \ LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(syscall_entry_##_name, PARAMS(_fields)) #define SC_LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(_template, _name) \ @@ -150,9 +150,9 @@ struct file_handle; #define SC_LTTNG_TRACEPOINT_EVENT(_name, _proto, _args, _fields) \ LTTNG_TRACEPOINT_EVENT(compat_syscall_entry_##_name, PARAMS(_proto), PARAMS(_args), \ PARAMS(_fields)) -#define SC_LTTNG_TRACEPOINT_EVENT_CODE(_name, _proto, _args, _locvar, _code, _fields) \ +#define SC_LTTNG_TRACEPOINT_EVENT_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ LTTNG_TRACEPOINT_EVENT_CODE(compat_syscall_entry_##_name, PARAMS(_proto), PARAMS(_args), \ - PARAMS(_locvar), PARAMS(_code), PARAMS(_fields)) + PARAMS(_locvar), PARAMS(_code_pre), PARAMS(_fields), PARAMS(_code_post)) #define SC_LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \ LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(compat_syscall_entry_##_name, PARAMS(_fields)) #define SC_LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(_template, _name) \ @@ -194,9 +194,9 @@ struct file_handle; #define SC_LTTNG_TRACEPOINT_EVENT(_name, _proto, _args, _fields) \ LTTNG_TRACEPOINT_EVENT(syscall_exit_##_name, PARAMS(_proto), PARAMS(_args), \ PARAMS(_fields)) -#define SC_LTTNG_TRACEPOINT_EVENT_CODE(_name, _proto, _args, _locvar, _code, _fields) \ +#define SC_LTTNG_TRACEPOINT_EVENT_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ LTTNG_TRACEPOINT_EVENT_CODE(syscall_exit_##_name, PARAMS(_proto), PARAMS(_args), \ - PARAMS(_locvar), PARAMS(_code), PARAMS(_fields)) + PARAMS(_locvar), PARAMS(_code_pre), PARAMS(_fields), PARAMS(_code_post)) #define SC_LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \ LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(syscall_exit_##_name, PARAMS(_fields)) #define SC_LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(_template, _name) \ @@ -226,9 +226,9 @@ struct file_handle; #define SC_LTTNG_TRACEPOINT_EVENT(_name, _proto, _args, _fields) \ LTTNG_TRACEPOINT_EVENT(compat_syscall_exit_##_name, PARAMS(_proto), PARAMS(_args), \ PARAMS(_fields)) -#define SC_LTTNG_TRACEPOINT_EVENT_CODE(_name, _proto, _args, _locvar, _code, _fields) \ +#define SC_LTTNG_TRACEPOINT_EVENT_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ LTTNG_TRACEPOINT_EVENT_CODE(compat_syscall_exit_##_name, PARAMS(_proto), PARAMS(_args), \ - PARAMS(_locvar), PARAMS(_code), PARAMS(_fields)) + PARAMS(_locvar), PARAMS(_code_pre), PARAMS(_fields), PARAMS(_code_post)) #define SC_LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \ LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(compat_syscall_exit_##_name, PARAMS(_fields)) #define SC_LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(_template, _name) \ diff --git a/probes/define_trace.h b/probes/define_trace.h index 4b67f5f8..98bd9f8b 100644 --- a/probes/define_trace.h +++ b/probes/define_trace.h @@ -56,10 +56,10 @@ #define LTTNG_TRACEPOINT_EVENT(name, proto, args, fields) #undef LTTNG_TRACEPOINT_EVENT_CODE -#define LTTNG_TRACEPOINT_EVENT_CODE(name, proto, args, _locvar, _code, fields) +#define LTTNG_TRACEPOINT_EVENT_CODE(name, proto, args, _locvar, _code_pre, fields, _code_post) #undef LTTNG_TRACEPOINT_EVENT_CODE_MAP -#define LTTNG_TRACEPOINT_EVENT_CODE_MAP(name, map, proto, args, _locvar, _code, fields) +#define LTTNG_TRACEPOINT_EVENT_CODE_MAP(name, map, proto, args, _locvar, _code_pre, fields, _code_post) #undef LTTNG_TRACEPOINT_EVENT_INSTANCE #define LTTNG_TRACEPOINT_EVENT_INSTANCE(template, name, proto, args) diff --git a/probes/lttng-events-reset.h b/probes/lttng-events-reset.h index 1bc77820..8262d83e 100644 --- a/probes/lttng-events-reset.h +++ b/probes/lttng-events-reset.h @@ -21,10 +21,10 @@ /* Reset macros used within LTTNG_TRACEPOINT_EVENT to "nothing" */ #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE -#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code, _fields) +#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS -#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, _fields) +#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) @@ -41,8 +41,11 @@ #undef TP_locvar #define TP_locvar(...) -#undef TP_code -#define TP_code(...) +#undef TP_code_pre +#define TP_code_pre(...) + +#undef TP_code_post +#define TP_code_post(...) #undef TP_FIELDS #define TP_FIELDS(args...) diff --git a/probes/lttng-events.h b/probes/lttng-events.h index 35d6f790..0e3b713b 100644 --- a/probes/lttng-events.h +++ b/probes/lttng-events.h @@ -55,23 +55,25 @@ LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(map, name, map) #undef LTTNG_TRACEPOINT_EVENT_CODE_MAP -#define LTTNG_TRACEPOINT_EVENT_CODE_MAP(name, map, proto, args, _locvar, _code, fields) \ +#define LTTNG_TRACEPOINT_EVENT_CODE_MAP(name, map, proto, args, _locvar, _code_pre, fields, _code_post) \ LTTNG_TRACEPOINT_EVENT_CLASS_CODE(map, \ PARAMS(proto), \ PARAMS(args), \ PARAMS(_locvar), \ - PARAMS(_code), \ - PARAMS(fields)) \ + PARAMS(_code_pre), \ + PARAMS(fields), \ + PARAMS(_code_post)) \ LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(map, name, map, PARAMS(proto), PARAMS(args)) #undef LTTNG_TRACEPOINT_EVENT_CODE -#define LTTNG_TRACEPOINT_EVENT_CODE(name, proto, args, _locvar, _code, fields) \ +#define LTTNG_TRACEPOINT_EVENT_CODE(name, proto, args, _locvar, _code_pre, fields, _code_post) \ LTTNG_TRACEPOINT_EVENT_CODE_MAP(name, name, \ PARAMS(proto), \ PARAMS(args), \ PARAMS(_locvar), \ - PARAMS(_code), \ - PARAMS(fields)) + PARAMS(_code_pre), \ + PARAMS(fields), \ + PARAMS(_code_post)) /* * LTTNG_TRACEPOINT_EVENT_CLASS can be used to add a generic function @@ -106,11 +108,11 @@ #undef LTTNG_TRACEPOINT_EVENT_CLASS #define LTTNG_TRACEPOINT_EVENT_CLASS(_name, _proto, _args, _fields) \ LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, PARAMS(_proto), PARAMS(_args), , , \ - PARAMS(_fields)) + PARAMS(_fields), ) #undef LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS #define LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \ - LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, , , PARAMS(_fields)) + LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, , , PARAMS(_fields), ) /* @@ -165,11 +167,11 @@ void __event_template_proto___##_template(_proto); void __event_template_proto___##_template(void); #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE -#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code, _fields) \ +#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ void __event_template_proto___##_name(_proto); #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS -#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, _fields) \ +#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ void __event_template_proto___##_name(void); #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) @@ -302,14 +304,14 @@ void __event_template_proto___##_name(void); #define TP_FIELDS(...) __VA_ARGS__ /* Only one used in this phase */ #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS -#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, _fields) \ +#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ static const struct lttng_event_field __event_fields___##_name[] = { \ _fields \ }; #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE -#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code, _fields) \ - LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, PARAMS(_fields)) +#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ + LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, PARAMS(_fields), _code_post) #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) @@ -326,11 +328,11 @@ void __event_template_proto___##_name(void); #define TP_PROTO(...) __VA_ARGS__ #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE -#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code, _fields) \ +#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ static void __event_probe__##_name(void *__data, _proto); #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS -#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, _fields) \ +#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ static void __event_probe__##_name(void *__data); #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) @@ -399,7 +401,7 @@ static void __event_probe__##_name(void *__data); #define TP_locvar(...) __VA_ARGS__ #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE -#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code, _fields) \ +#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ static inline size_t __event_get_size__##_name(size_t *__dynamic_len, \ void *__tp_locvar, _proto) \ { \ @@ -412,7 +414,7 @@ static inline size_t __event_get_size__##_name(size_t *__dynamic_len, \ } #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS -#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, _fields) \ +#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ static inline size_t __event_get_size__##_name(size_t *__dynamic_len, \ void *__tp_locvar) \ { \ @@ -575,7 +577,7 @@ static inline size_t __event_get_size__##_name(size_t *__dynamic_len, \ #define TP_locvar(...) __VA_ARGS__ #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS -#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, _fields) \ +#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ static inline \ void __event_prepare_filter_stack__##_name(char *__stack_data, \ void *__tp_locvar) \ @@ -586,7 +588,7 @@ void __event_prepare_filter_stack__##_name(char *__stack_data, \ } #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE -#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code, _fields) \ +#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ static inline \ void __event_prepare_filter_stack__##_name(char *__stack_data, \ void *__tp_locvar, _proto) \ @@ -646,7 +648,7 @@ void __event_prepare_filter_stack__##_name(char *__stack_data, \ #define TP_locvar(...) __VA_ARGS__ #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE -#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code, _fields) \ +#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ static inline size_t __event_get_align__##_name(void *__tp_locvar, _proto) \ { \ size_t __event_align = 1; \ @@ -657,7 +659,7 @@ static inline size_t __event_get_align__##_name(void *__tp_locvar, _proto) \ } #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS -#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, _fields) \ +#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ static inline size_t __event_get_align__##_name(void *__tp_locvar) \ { \ size_t __event_align = 1; \ @@ -871,8 +873,11 @@ static inline size_t __event_get_align__##_name(void *__tp_locvar) \ #undef TP_locvar #define TP_locvar(...) __VA_ARGS__ -#undef TP_code -#define TP_code(...) __VA_ARGS__ +#undef TP_code_pre +#define TP_code_pre(...) __VA_ARGS__ + +#undef TP_code_post +#define TP_code_post(...) __VA_ARGS__ /* * For state dump, check that "session" argument (mandatory) matches the @@ -893,7 +898,7 @@ static inline size_t __event_get_align__##_name(void *__tp_locvar) \ * Perform UNION (||) of filter runtime list. */ #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE -#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code, _fields) \ +#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ static void __event_probe__##_name(void *__data, _proto) \ { \ struct probe_local_vars { _locvar }; \ @@ -924,7 +929,7 @@ static void __event_probe__##_name(void *__data, _proto) \ __lpf = lttng_rcu_dereference(__session->pid_tracker); \ if (__lpf && likely(!lttng_pid_tracker_lookup(__lpf, current->pid))) \ return; \ - _code \ + _code_pre \ if (unlikely(!list_empty(&__event->bytecode_runtime_head))) { \ struct lttng_bytecode_runtime *bc_runtime; \ int __filter_record = __event->has_enablers_without_bytecode; \ @@ -937,7 +942,7 @@ static void __event_probe__##_name(void *__data, _proto) \ __filter_record = 1; \ } \ if (likely(!__filter_record)) \ - return; \ + goto __post; \ } \ __event_len = __event_get_size__##_name(__stackvar.__dynamic_len, \ tp_locvar, _args); \ @@ -946,13 +951,16 @@ static void __event_probe__##_name(void *__data, _proto) \ __event_align, -1); \ __ret = __chan->ops->event_reserve(&__ctx, __event->id); \ if (__ret < 0) \ - return; \ + goto __post; \ _fields \ __chan->ops->event_commit(&__ctx); \ +__post: \ + _code_post \ + return; \ } #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS -#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, _fields) \ +#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ static void __event_probe__##_name(void *__data) \ { \ struct probe_local_vars { _locvar }; \ @@ -983,7 +991,7 @@ static void __event_probe__##_name(void *__data) \ __lpf = lttng_rcu_dereference(__session->pid_tracker); \ if (__lpf && likely(!lttng_pid_tracker_lookup(__lpf, current->pid))) \ return; \ - _code \ + _code_pre \ if (unlikely(!list_empty(&__event->bytecode_runtime_head))) { \ struct lttng_bytecode_runtime *bc_runtime; \ int __filter_record = __event->has_enablers_without_bytecode; \ @@ -996,7 +1004,7 @@ static void __event_probe__##_name(void *__data) \ __filter_record = 1; \ } \ if (likely(!__filter_record)) \ - return; \ + goto __post; \ } \ __event_len = __event_get_size__##_name(__stackvar.__dynamic_len, tp_locvar); \ __event_align = __event_get_align__##_name(tp_locvar); \ @@ -1004,9 +1012,12 @@ static void __event_probe__##_name(void *__data) \ __event_align, -1); \ __ret = __chan->ops->event_reserve(&__ctx, __event->id); \ if (__ret < 0) \ - return; \ + goto __post; \ _fields \ __chan->ops->event_commit(&__ctx); \ +__post: \ + _code_post \ + return; \ } #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) diff --git a/probes/lttng-tracepoint-event.h b/probes/lttng-tracepoint-event.h index 39c0f371..fc3417cd 100644 --- a/probes/lttng-tracepoint-event.h +++ b/probes/lttng-tracepoint-event.h @@ -37,9 +37,9 @@ #define LTTNG_TRACEPOINT_EVENT(name, proto, args, fields) \ _LTTNG_INSTRUMENTATION(DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))) -#define LTTNG_TRACEPOINT_EVENT_CODE(name, proto, args, _locvar, _code, fields) \ +#define LTTNG_TRACEPOINT_EVENT_CODE(name, proto, args, _locvar, _code_pre, fields, _code_post) \ _LTTNG_INSTRUMENTATION(DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))) -#define LTTNG_TRACEPOINT_EVENT_CODE_MAP(name, map, proto, args, _locvar, _code, fields) \ +#define LTTNG_TRACEPOINT_EVENT_CODE_MAP(name, map, proto, args, _locvar, _code_pre, fields, _code_post) \ _LTTNG_INSTRUMENTATION(DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))) #define LTTNG_TRACEPOINT_EVENT_MAP(name, map, proto, args, fields) \ _LTTNG_INSTRUMENTATION(DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))) @@ -47,8 +47,8 @@ _LTTNG_INSTRUMENTATION(DECLARE_TRACE_NOARGS(name)) #define LTTNG_TRACEPOINT_EVENT_CLASS(name, proto, args, fields) -#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code, _fields) -#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, _fields) +#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) +#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) #define LTTNG_TRACEPOINT_EVENT_INSTANCE(template, name, proto, args) \ _LTTNG_INSTRUMENTATION(DECLARE_TRACE(name, PARAMS(proto), PARAMS(args)))