X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=include%2Fust%2Fmarker.h;h=0e0b466b994546337c61e3d95e7714837e8c49ad;hb=7166e240639cec06f4273f65059300f98b5296f6;hp=ee2c7e651f210846b9f81173a952bc8c482447fa;hpb=bb9ade2917758c8b8fbd08f2a5c6f327f486992f;p=ust.git diff --git a/include/ust/marker.h b/include/ust/marker.h index ee2c7e6..0e0b466 100644 --- a/include/ust/marker.h +++ b/include/ust/marker.h @@ -25,15 +25,13 @@ #define _UST_MARKER_H #include -//ust// #include #include -//ust// #include #include -#include +#include #include -//ust// struct module; -//ust// struct task_struct; +#include + struct marker; /* To stringify the expansion of a define */ @@ -84,28 +82,36 @@ struct marker { #define CONFIG_MARKERS #ifdef CONFIG_MARKERS -#define _DEFINE_MARKER(channel, name, tp_name_str, tp_cb, format, unique) \ +#define _DEFINE_MARKER(channel, name, tp_name_str, tp_cb, format, unique, m) \ struct registers regs; \ - /* make asm label visible to C */ \ - extern struct marker make_mark_struct_name(channel, name, unique); \ \ /* 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. */ \ + * 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_" XSTR(channel) "_" XSTR(name) "_channel_" XSTR(unique) "\n\t" \ + /*".section __markers_strings\n\t"*/ \ ".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 " XSTR(format) "\n\t" \ + ".string " "\"" format "\"" "\n\t" \ ".previous\n\t" \ + ".endif\n\t" \ + ); \ + asm volatile ( \ + /*".section __markers\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" \ - ".hidden " XSTR(make_mark_struct_name(channel, name, unique)) "\n\t" \ + ".balign 8\n\t" \ + "2:\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 */ \ @@ -113,27 +119,41 @@ struct marker { ".byte 0\n\t" /* ptype */ \ ".word 0\n\t" /* channel_id */ \ ".word 0\n\t" /* event_id */ \ - ".align " XSTR(__SIZEOF_POINTER__) "\n\t" /* alignment */ \ + ".balign " 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" \ + ARCH_COPY_ADDR("%[outptr]") \ "1:\n\t" \ - ); \ + : [outptr] "=r" (m) ); \ \ save_registers(®s) -#define DEFINE_MARKER(channel, name, format, unique) \ - _DEFINE_MARKER(channel, name, NULL, NULL, format, unique) +#define DEFINE_MARKER(channel, name, format, unique, m) \ + _DEFINE_MARKER(channel, name, NULL, NULL, format, unique, m) + +#define DEFINE_MARKER_TP(channel, name, tp_name, tp_cb, format) \ + _DEFINE_MARKER_TP(channel, name, #tp_name, tp_cb, format) -#define DEFINE_MARKER_TP(channel, name, tp_name, tp_cb, format, unique) \ - _DEFINE_MARKER(channel, name, #tp_name, tp_cb, format, unique) +#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"), aligned(8))) = \ + { __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 } /* * Make sure the alignment of the structure in the __markers section will @@ -145,44 +165,34 @@ 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, __COUNTER__, 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 *m; \ + DEFINE_MARKER(channel, name, format, unique, m); \ __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(m->state))) \ + (m->call)(m, call_private, ®s, ## 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(m->state))) \ + (m->call)(m, call_private, ®s, ## args); \ } \ } while (0) #define __trace_mark_tp(channel, name, call_private, tp_name, tp_cb, format, args...) \ - __trace_mark_tp_counter(channel, name, __COUNTER__, call_private, tp_name, tp_cb, format, ## args) + __trace_mark_tp_counter(channel, name, __LINE__, call_private, tp_name, tp_cb, format, ## args) #define __trace_mark_tp_counter(channel, name, unique, call_private, tp_name, tp_cb, format, args...) \ do { \ + struct marker m; \ void __check_tp_type(void) \ { \ register_trace_##tp_name(tp_cb); \ } \ - DEFINE_MARKER_TP(channel, name, tp_name, tp_cb, format, unique);\ + DEFINE_MARKER_TP(channel, name, tp_name, tp_cb, format, unique, m);\ __mark_check_format(format, ## args); \ (*__mark_##channel##_##name.call)(&__mark_##channel##_##name, \ call_private, ®s, ## args); \ @@ -194,7 +204,7 @@ extern void marker_update_probe_range(struct marker *begin, #define GET_MARKER(channel, name) (__mark_##channel##_##name) #else /* !CONFIG_MARKERS */ -#define DEFINE_MARKER(channel, name, tp_name, tp_cb, format) +#define DEFINE_MARKER(channel, name, tp_name, tp_cb, format, m) #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, \ @@ -234,8 +244,7 @@ static inline void marker_update_probe_range(struct marker *begin, * * Places a marker using a standard memory read (_imv_read()) to be * enabled. Should be used for markers in code paths where instruction - * modification based enabling is not welcome. (__init and __exit functions, - * lockdep, some traps, printk). + * modification based enabling is not welcome. */ #define _trace_mark(channel, name, format, args...) \ __trace_mark(1, channel, name, NULL, format, ## args) @@ -350,6 +359,7 @@ struct lib { }; extern int marker_register_lib(struct marker *markers_start, int markers_count); +extern int marker_unregister_lib(struct marker *markers_start); #define MARKER_LIB \ extern struct marker __start___markers[] __attribute__((weak, visibility("hidden"))); \ @@ -358,6 +368,11 @@ extern int marker_register_lib(struct marker *markers_start, int markers_count); static void __attribute__((constructor)) __markers__init(void) \ { \ marker_register_lib(__start___markers, (((long)__stop___markers)-((long)__start___markers))/sizeof(struct marker)); \ + } \ + \ + static void __attribute__((destructor)) __markers__destroy(void) \ + { \ + marker_unregister_lib(__start___markers); \ } extern void marker_set_new_marker_cb(void (*cb)(struct marker *));