X-Git-Url: http://git.lttng.org/?a=blobdiff_plain;f=include%2Fust%2Fmarker.h;h=da738d1f3254f67b566df5c54d1800ef161216f1;hb=37ee34e4d9b9363c758aa43255d71661900e89b0;hp=641df8fd6f9460d3ff667479d58b991604f504d7;hpb=c1f205309da615f1f0c68beedf37365942246537;p=ust.git diff --git a/include/ust/marker.h b/include/ust/marker.h index 641df8f..da738d1 100644 --- a/include/ust/marker.h +++ b/include/ust/marker.h @@ -25,23 +25,17 @@ #define _UST_MARKER_H #include -//ust// #include #include -//ust// #include -#include -#include +#include +#include #include +#include +#include #include -//ust// struct module; -//ust// struct task_struct; struct marker; -/* To stringify the expansion of a define */ -#define XSTR(d) STR(d) -#define STR(s) #s - /** * marker_probe_func - Type of a marker probe function * @mdata: marker data @@ -70,7 +64,7 @@ struct marker { const char *format; /* Marker format string, describing the * variable argument list. */ - DEFINE_IMV(char, state);/* Immediate value state. */ + DEFINE_IMV(char, state);/* Immediate value state. */ char ptype; /* probe type : 0 : single, 1 : multi */ /* Probe wrapper */ u16 channel_id; /* Numeric channel identifier, dynamic */ @@ -81,61 +75,87 @@ struct marker { const char *tp_name; /* Optional tracepoint name */ void *tp_cb; /* Optional tracepoint callback */ void *location; /* Address of marker in code */ -} __attribute__((aligned(8))); +}; -#define CONFIG_MARKERS -#ifdef CONFIG_MARKERS +#define GET_MARKER(name) (__mark_ust_##name) -#define _DEFINE_MARKER(channel, name, tp_name_str, tp_cb, format, unique) \ - struct registers regs; \ - /* make asm label visible to C */ \ - extern struct marker make_mark_struct_name(channel, name, unique); \ +#define _DEFINE_MARKER(channel, name, tp_name_str, tp_cb, format, unique, m) \ + struct registers __marker_regs; \ \ /* This next asm has to be a basic inline asm (no input/output/clobber), \ - because it must not require %-sign escaping, as we most certainly \ - have some %-signs in the format string. */ \ - asm volatile ( \ - ".section __markers_strings,\"aw\",@progbits\n\t" \ - "__mstrtab_" XSTR(channel) "_" XSTR(name) "_channel_" XSTR(unique) ":\n\t" \ - ".string \"" XSTR(channel) "\"\n\t" \ - "__mstrtab_" XSTR(channel) "_" XSTR(name) "_name_" XSTR(unique) ":\n\t" \ - ".string \"" XSTR(name) "\"\n\t" \ - "__mstrtab_" XSTR(channel) "_" XSTR(name) "_format_" XSTR(unique) ":\n\t" \ - ".string " "\"" format "\"" "\n\t" \ - ".previous\n\t" \ - ".section __markers,\"aw\",@progbits\n\t" \ - ".align 8\n\t" \ - XSTR(make_mark_struct_name(channel, name, unique)) ":\n\t" \ - ".global " XSTR(make_mark_struct_name(channel, name, unique)) "\n\t" \ - ".local " XSTR(make_mark_struct_name(channel, name, unique)) "\n\t" \ - _ASM_PTR "(__mstrtab_" XSTR(channel) "_" XSTR(name) "_channel_" XSTR(unique) ")\n\t" /* channel string */ \ - _ASM_PTR "(__mstrtab_" XSTR(channel) "_" XSTR(name) "_name_" XSTR(unique) ")\n\t" /* name string */ \ - _ASM_PTR "(__mstrtab_" XSTR(channel) "_" XSTR(name) "_format_" XSTR(unique) ")\n\t" /* format string */ \ - ".byte 0\n\t" /* state imv */ \ - ".byte 0\n\t" /* ptype */ \ - ".word 0\n\t" /* channel_id */ \ - ".word 0\n\t" /* event_id */ \ - ".align " XSTR(__WORDSIZE) " / 8\n\t" /* alignment */ \ - _ASM_PTR "(marker_probe_cb)\n\t" /* call */ \ - _ASM_PTR "(__mark_empty_function)\n\t" /* marker_probe_closure single.field1 */ \ - _ASM_PTR "0\n\t" /* marker_probe_closure single.field2 */ \ - _ASM_PTR "0\n\t" /* marker_probe_closure *multi */ \ - _ASM_PTR "0\n\t" /* tp_name */ \ - _ASM_PTR "0\n\t" /* tp_cb */ \ - "__mark_location_" XSTR(unique) ":\n\t" \ - _ASM_PTR "(1f)\n\t" /* location */ \ - ".previous\n\t" \ - "1:\n\t" \ + * because it must not require %-sign escaping, as we most certainly \ + * have some %-signs in the format string. \ + */ \ + asm volatile ( \ + /* We only define these symbols if they have not yet been defined. Indeed, \ + * if two markers with the same channel/name are on the same line, they \ + * will try to create the same symbols, resulting in a conflict. This \ + * is not unusual as it can be the result of function inlining. \ + */ \ + ".ifndef __mstrtab_" __stringify(channel) "_" __stringify(name) "_channel_" __stringify(unique) "\n\t" \ + /*".section __markers_strings\n\t"*/ \ + ".section __markers_strings,\"aw\"\n\t" \ + "__mstrtab_" __stringify(channel) "_" __stringify(name) "_channel_" __stringify(unique) ":\n\t" \ + ".string \"" __stringify(channel) "\"\n\t" \ + "__mstrtab_" __stringify(channel) "_" __stringify(name) "_name_" __stringify(unique) ":\n\t" \ + ".string \"" __stringify(name) "\"\n\t" \ + "__mstrtab_" __stringify(channel) "_" __stringify(name) "_format_" __stringify(unique) ":\n\t" \ + ".string " "\"" format "\"" "\n\t" \ + ".previous\n\t" \ + ".endif\n\t" \ ); \ + asm volatile ( \ + /*".section __markers\n\t"*/ \ + ".section __markers,\"aw\"\n\t" \ + "2:\n\t" \ + _ASM_PTR "(__mstrtab_" __stringify(channel) "_" __stringify(name) "_channel_" __stringify(unique) ")\n\t" /* channel string */ \ + _ASM_PTR "(__mstrtab_" __stringify(channel) "_" __stringify(name) "_name_" __stringify(unique) ")\n\t" /* name string */ \ + _ASM_PTR "(__mstrtab_" __stringify(channel) "_" __stringify(name) "_format_" __stringify(unique) ")\n\t" /* format string */ \ + ".byte 0\n\t" /* state imv */ \ + ".byte 0\n\t" /* ptype */ \ + ".hword 0\n\t" /* channel_id */ \ + ".hword 0\n\t" /* event_id */ \ + ".balign " __stringify(__WORDSIZE) " / 8\n\t" /* alignment */ \ + _ASM_PTR "(marker_probe_cb)\n\t" /* call */ \ + _ASM_PTR "(__mark_empty_function)\n\t" /* marker_probe_closure single.field1 */ \ + _ASM_PTR "0\n\t" /* marker_probe_closure single.field2 */ \ + _ASM_PTR "0\n\t" /* marker_probe_closure *multi */ \ + _ASM_PTR "0\n\t" /* tp_name */ \ + _ASM_PTR "0\n\t" /* tp_cb */ \ + _ASM_PTR "(1f)\n\t" /* location */ \ + ".previous\n\t" \ + /*".section __markers_ptrs\n\t"*/ \ + ".section __markers_ptrs,\"a\"\n\t" \ + _ASM_PTR "(2b)\n\t" \ + ".previous\n\t" \ + "1:\n\t" \ + ARCH_COPY_ADDR("%[outptr]") \ + : [outptr] "=r" (m) ); \ \ - save_registers(®s) - - -#define DEFINE_MARKER(channel, name, format, unique) \ - _DEFINE_MARKER(channel, name, NULL, NULL, format, unique) - -#define DEFINE_MARKER_TP(channel, name, tp_name, tp_cb, format, unique) \ - _DEFINE_MARKER(channel, name, #tp_name, tp_cb, format, unique) + save_registers(&__marker_regs) + + +#define DEFINE_MARKER(name, format, unique, m) \ + _DEFINE_MARKER(ust, name, NULL, NULL, format, unique, m) + +#define DEFINE_MARKER_TP(name, tp_name, tp_cb, format) \ + _DEFINE_MARKER_TP(ust, name, #tp_name, tp_cb, format) + +#define _DEFINE_MARKER_TP(channel, name, tp_name_str, tp_cb, format) \ + static const char __mstrtab_##channel##_##name[] \ + __attribute__((section("__markers_strings"))) \ + = #channel "\0" #name "\0" format; \ + static struct marker __mark_##channel##_##name \ + __attribute__((section("__markers"))) = \ + { __mstrtab_##channel##_##name, \ + &__mstrtab_##channel##_##name[sizeof(#channel)], \ + &__mstrtab_##channel##_##name[sizeof(#channel) + sizeof(#name)], \ + 0, 0, 0, 0, marker_probe_cb, \ + { __mark_empty_function, NULL}, \ + NULL, tp_name_str, tp_cb }; \ + static struct marker * const __mark_ptr_##channel##_##name \ + __attribute__((used, section("__markers_ptrs"))) = \ + &__mark_##channel##_##name; /* * Make sure the alignment of the structure in the __markers section will @@ -147,31 +167,20 @@ struct marker { * If generic is false, immediate values are used. */ -#define make_mark_struct_name(channel, name, unique) \ - make_mark_struct_name2(channel, name, unique) - -#define make_mark_struct_name2(channel, name, unique) \ - __mark_struct_##channel##_##name##_##unique - #define __trace_mark(generic, channel, name, call_private, format, args...) \ __trace_mark_counter(generic, channel, name, __LINE__, call_private, format, ## args) #define __trace_mark_counter(generic, channel, name, unique, call_private, format, args...) \ do { \ - DEFINE_MARKER(channel, name, format, unique); \ + struct marker *__marker_counter_ptr; \ + _DEFINE_MARKER(channel, name, NULL, NULL, format, unique, __marker_counter_ptr); \ __mark_check_format(format, ## args); \ if (!generic) { \ - if (unlikely(imv_read( \ - make_mark_struct_name(channel, name, unique).state))) \ - (make_mark_struct_name(channel, name, unique).call) \ - (&make_mark_struct_name(channel, name, unique), \ - call_private, ®s, ## args); \ + if (unlikely(imv_read(__marker_counter_ptr->state))) \ + (__marker_counter_ptr->call)(__marker_counter_ptr, call_private, &__marker_regs, ## args); \ } else { \ - if (unlikely(_imv_read( \ - make_mark_struct_name(channel, name, unique).state))) \ - (make_mark_struct_name(channel, name, unique).call) \ - (&make_mark_struct_name(channel, name, unique), \ - call_private, ®s, ## args); \ + if (unlikely(_imv_read(__marker_counter_ptr->state))) \ + (__marker_counter_ptr->call)(__marker_counter_ptr, call_private, &__marker_regs, ## args); \ } \ } while (0) @@ -180,43 +189,22 @@ struct marker { #define __trace_mark_tp_counter(channel, name, unique, call_private, tp_name, tp_cb, format, args...) \ do { \ + struct registers __marker_regs; \ void __check_tp_type(void) \ { \ - register_trace_##tp_name(tp_cb); \ + register_trace_##tp_name(tp_cb, call_private); \ } \ - DEFINE_MARKER_TP(channel, name, tp_name, tp_cb, format, unique);\ + _DEFINE_MARKER_TP(channel, name, #tp_name, tp_cb, format); \ __mark_check_format(format, ## args); \ - (*__mark_##channel##_##name.call)(&__mark_##channel##_##name, \ - call_private, ®s, ## args); \ + (*__mark_##channel##_##name.call)(&__mark_##channel##_##name, \ + call_private, &__marker_regs, ## args); \ } while (0) -extern void marker_update_probe_range(struct marker *begin, - struct marker *end); - -#define GET_MARKER(channel, name) (__mark_##channel##_##name) - -#else /* !CONFIG_MARKERS */ -#define DEFINE_MARKER(channel, name, tp_name, tp_cb, format) -#define __trace_mark(generic, channel, name, call_private, format, args...) \ - __mark_check_format(format, ## args) -#define __trace_mark_tp(channel, name, call_private, tp_name, tp_cb, \ - format, args...) \ - do { \ - void __check_tp_type(void) \ - { \ - register_trace_##tp_name(tp_cb); \ - } \ - __mark_check_format(format, ## args); \ - } while (0) -static inline void marker_update_probe_range(struct marker *begin, - struct marker *end) -{ } -#define GET_MARKER(channel, name) -#endif /* CONFIG_MARKERS */ +extern void marker_update_probe_range(struct marker * const *begin, + struct marker * const *end); /** * trace_mark - Marker using code patching - * @channel: marker channel (where to send the data), not quoted. * @name: marker name, not quoted. * @format: format string * @args...: variable argument list @@ -224,12 +212,11 @@ static inline void marker_update_probe_range(struct marker *begin, * Places a marker using optimized code patching technique (imv_read()) * to be enabled when immediate values are present. */ -#define trace_mark(channel, name, format, args...) \ - __trace_mark(0, channel, name, NULL, format, ## args) +#define trace_mark(name, format, args...) \ + __trace_mark(0, ust, name, NULL, format, ## args) /** * _trace_mark - Marker using variable read - * @channel: marker channel (where to send the data), not quoted. * @name: marker name, not quoted. * @format: format string * @args...: variable argument list @@ -238,12 +225,11 @@ static inline void marker_update_probe_range(struct marker *begin, * enabled. Should be used for markers in code paths where instruction * modification based enabling is not welcome. */ -#define _trace_mark(channel, name, format, args...) \ - __trace_mark(1, channel, name, NULL, format, ## args) +#define _trace_mark(name, format, args...) \ + __trace_mark(1, ust, name, NULL, format, ## args) /** * trace_mark_tp - Marker in a tracepoint callback - * @channel: marker channel (where to send the data), not quoted. * @name: marker name, not quoted. * @tp_name: tracepoint name, not quoted. * @tp_cb: tracepoint callback. Should have an associated global symbol so it @@ -253,8 +239,8 @@ static inline void marker_update_probe_range(struct marker *begin, * * Places a marker in a tracepoint callback. */ -#define trace_mark_tp(channel, name, tp_name, tp_cb, format, args...) \ - __trace_mark_tp(channel, name, NULL, tp_name, tp_cb, format, ## args) +#define trace_mark_tp(name, tp_name, tp_cb, format, args...) \ + __trace_mark_tp(ust, name, NULL, tp_name, tp_cb, format, ## args) /** * MARK_NOARGS - Format string for a marker with no argument. @@ -315,15 +301,15 @@ extern void *marker_get_private_data(const char *channel, const char *name, struct marker_iter { //ust// struct module *module; struct lib *lib; - struct marker *marker; + struct marker * const *marker; }; extern void marker_iter_start(struct marker_iter *iter); extern void marker_iter_next(struct marker_iter *iter); extern void marker_iter_stop(struct marker_iter *iter); extern void marker_iter_reset(struct marker_iter *iter); -extern int marker_get_iter_range(struct marker **marker, struct marker *begin, - struct marker *end); +extern int marker_get_iter_range(struct marker * const **marker, struct marker * const *begin, + struct marker * const *end); extern void marker_update_process(void); extern int is_marker_enabled(const char *channel, const char *name); @@ -342,23 +328,33 @@ struct marker_addr { }; struct lib { - struct marker *markers_start; + struct marker * const *markers_start; #ifdef CONFIG_UST_GDB_INTEGRATION struct marker_addr *markers_addr_start; #endif int markers_count; - struct list_head list; + struct cds_list_head list; }; -extern int marker_register_lib(struct marker *markers_start, int markers_count); +extern int marker_register_lib(struct marker * const *markers_start, int markers_count); +extern int marker_unregister_lib(struct marker * const *markers_start); #define MARKER_LIB \ - extern struct marker __start___markers[] __attribute__((weak, visibility("hidden"))); \ - extern struct marker __stop___markers[] __attribute__((weak, visibility("hidden"))); \ + extern struct marker * const __start___markers_ptrs[] __attribute__((weak, visibility("hidden"))); \ + extern struct marker * const __stop___markers_ptrs[] __attribute__((weak, visibility("hidden"))); \ + static struct marker * const __mark_ptr_dummy \ + __attribute__((used, section("__markers_ptrs"))) = NULL;\ \ static void __attribute__((constructor)) __markers__init(void) \ { \ - marker_register_lib(__start___markers, (((long)__stop___markers)-((long)__start___markers))/sizeof(struct marker)); \ + marker_register_lib(__start___markers_ptrs, \ + __stop___markers_ptrs \ + - __start___markers_ptrs); \ + } \ + \ + static void __attribute__((destructor)) __markers__destroy(void)\ + { \ + marker_unregister_lib(__start___markers_ptrs); \ } extern void marker_set_new_marker_cb(void (*cb)(struct marker *));