diff options
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/builtin-trace.c | 199 |
1 files changed, 188 insertions, 11 deletions
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index ee59df300a34..329b7832b5da 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -35,6 +35,189 @@ # define MADV_UNMERGEABLE 13 #endif +struct tp_field { + int offset; + union { + u64 (*integer)(struct tp_field *field, struct perf_sample *sample); + void *(*pointer)(struct tp_field *field, struct perf_sample *sample); + }; +}; + +#define TP_UINT_FIELD(bits) \ +static u64 tp_field__u##bits(struct tp_field *field, struct perf_sample *sample) \ +{ \ + return *(u##bits *)(sample->raw_data + field->offset); \ +} + +TP_UINT_FIELD(8); +TP_UINT_FIELD(16); +TP_UINT_FIELD(32); +TP_UINT_FIELD(64); + +#define TP_UINT_FIELD__SWAPPED(bits) \ +static u64 tp_field__swapped_u##bits(struct tp_field *field, struct perf_sample *sample) \ +{ \ + u##bits value = *(u##bits *)(sample->raw_data + field->offset); \ + return bswap_##bits(value);\ +} + +TP_UINT_FIELD__SWAPPED(16); +TP_UINT_FIELD__SWAPPED(32); +TP_UINT_FIELD__SWAPPED(64); + +static int tp_field__init_uint(struct tp_field *field, + struct format_field *format_field, + bool needs_swap) +{ + field->offset = format_field->offset; + + switch (format_field->size) { + case 1: + field->integer = tp_field__u8; + break; + case 2: + field->integer = needs_swap ? tp_field__swapped_u16 : tp_field__u16; + break; + case 4: + field->integer = needs_swap ? tp_field__swapped_u32 : tp_field__u32; + break; + case 8: + field->integer = needs_swap ? tp_field__swapped_u64 : tp_field__u64; + break; + default: + return -1; + } + + return 0; +} + +static void *tp_field__ptr(struct tp_field *field, struct perf_sample *sample) +{ + return sample->raw_data + field->offset; +} + +static int tp_field__init_ptr(struct tp_field *field, struct format_field *format_field) +{ + field->offset = format_field->offset; + field->pointer = tp_field__ptr; + return 0; +} + +struct syscall_tp { + struct tp_field id; + union { + struct tp_field args, ret; + }; +}; + +static int perf_evsel__init_tp_uint_field(struct perf_evsel *evsel, + struct tp_field *field, + const char *name) +{ + struct format_field *format_field = perf_evsel__field(evsel, name); + + if (format_field == NULL) + return -1; + + return tp_field__init_uint(field, format_field, evsel->needs_swap); +} + +#define perf_evsel__init_sc_tp_uint_field(evsel, name) \ + ({ struct syscall_tp *sc = evsel->priv;\ + perf_evsel__init_tp_uint_field(evsel, &sc->name, #name); }) + +static int perf_evsel__init_tp_ptr_field(struct perf_evsel *evsel, + struct tp_field *field, + const char *name) +{ + struct format_field *format_field = perf_evsel__field(evsel, name); + + if (format_field == NULL) + return -1; + + return tp_field__init_ptr(field, format_field); +} + +#define perf_evsel__init_sc_tp_ptr_field(evsel, name) \ + ({ struct syscall_tp *sc = evsel->priv;\ + perf_evsel__init_tp_ptr_field(evsel, &sc->name, #name); }) + +static void perf_evsel__delete_priv(struct perf_evsel *evsel) +{ + free(evsel->priv); + evsel->priv = NULL; + perf_evsel__delete(evsel); +} + +static struct perf_evsel *perf_evsel__syscall_newtp(const char *direction, + void *handler, int idx) +{ + struct perf_evsel *evsel = perf_evsel__newtp("raw_syscalls", direction, idx); + + if (evsel) { + evsel->priv = malloc(sizeof(struct syscall_tp)); + + if (evsel->priv == NULL) + goto out_delete; + + if (perf_evsel__init_sc_tp_uint_field(evsel, id)) + goto out_delete; + + evsel->handler = handler; + } + + return evsel; + +out_delete: + perf_evsel__delete_priv(evsel); + return NULL; +} + +#define perf_evsel__sc_tp_uint(evsel, name, sample) \ + ({ struct syscall_tp *fields = evsel->priv; \ + fields->name.integer(&fields->name, sample); }) + +#define perf_evsel__sc_tp_ptr(evsel, name, sample) \ + ({ struct syscall_tp *fields = evsel->priv; \ + fields->name.pointer(&fields->name, sample); }) + +static int perf_evlist__add_syscall_newtp(struct perf_evlist *evlist, + void *sys_enter_handler, + void *sys_exit_handler) +{ + int ret = -1; + int idx = evlist->nr_entries; + struct perf_evsel *sys_enter, *sys_exit; + + sys_enter = perf_evsel__syscall_newtp("sys_enter", sys_enter_handler, idx++); + if (sys_enter == NULL) + goto out; + + if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args)) + goto out_delete_sys_enter; + + sys_exit = perf_evsel__syscall_newtp("sys_exit", sys_exit_handler, idx++); + if (sys_exit == NULL) + goto out_delete_sys_enter; + + if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret)) + goto out_delete_sys_exit; + + perf_evlist__add(evlist, sys_enter); + perf_evlist__add(evlist, sys_exit); + + ret = 0; +out: + return ret; + +out_delete_sys_exit: + perf_evsel__delete_priv(sys_exit); +out_delete_sys_enter: + perf_evsel__delete_priv(sys_enter); + goto out; +} + + struct syscall_arg { unsigned long val; struct thread *thread; @@ -1392,7 +1575,7 @@ static int trace__sys_enter(struct trace *trace, struct perf_evsel *evsel, void *args; size_t printed = 0; struct thread *thread; - int id = perf_evsel__intval(evsel, sample, "id"); + int id = perf_evsel__sc_tp_uint(evsel, id, sample); struct syscall *sc = trace__syscall_info(trace, evsel, id); struct thread_trace *ttrace; @@ -1407,12 +1590,7 @@ static int trace__sys_enter(struct trace *trace, struct perf_evsel *evsel, if (ttrace == NULL) return -1; - args = perf_evsel__rawptr(evsel, sample, "args"); - if (args == NULL) { - fprintf(trace->output, "Problems reading syscall arguments\n"); - return -1; - } - + args = perf_evsel__sc_tp_ptr(evsel, args, sample); ttrace = thread->priv; if (ttrace->entry_str == NULL) { @@ -1445,7 +1623,7 @@ static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel, int ret; u64 duration = 0; struct thread *thread; - int id = perf_evsel__intval(evsel, sample, "id"); + int id = perf_evsel__sc_tp_uint(evsel, id, sample); struct syscall *sc = trace__syscall_info(trace, evsel, id); struct thread_trace *ttrace; @@ -1463,7 +1641,7 @@ static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel, if (trace->summary) thread__update_stats(ttrace, id, sample); - ret = perf_evsel__intval(evsel, sample, "ret"); + ret = perf_evsel__sc_tp_uint(evsel, ret, sample); if (id == trace->audit.open_id && ret >= 0 && trace->last_vfs_getname) { trace__set_fd_pathname(thread, ret, trace->last_vfs_getname); @@ -1675,8 +1853,7 @@ static int trace__run(struct trace *trace, int argc, const char **argv) goto out; } - if (perf_evlist__add_newtp(evlist, "raw_syscalls", "sys_enter", trace__sys_enter) || - perf_evlist__add_newtp(evlist, "raw_syscalls", "sys_exit", trace__sys_exit)) + if (perf_evlist__add_syscall_newtp(evlist, trace__sys_enter, trace__sys_exit)) goto out_error_tp; perf_evlist__add_vfs_getname(evlist); |