X-Git-Url: http://git.lttng.org/?a=blobdiff_plain;f=include%2Fust%2Fmarker.h;h=641df8fd6f9460d3ff667479d58b991604f504d7;hb=c1f205309da615f1f0c68beedf37365942246537;hp=c3cc0418b79635446395b8e7acaa21f64987e689;hpb=6793a8bf419a5b2138161098617c52ad4b804d05;p=ust.git diff --git a/include/ust/marker.h b/include/ust/marker.h index c3cc041..641df8f 100644 --- a/include/ust/marker.h +++ b/include/ust/marker.h @@ -32,6 +32,8 @@ #include #include +#include + //ust// struct module; //ust// struct task_struct; struct marker; @@ -84,22 +86,11 @@ struct marker { #define CONFIG_MARKERS #ifdef CONFIG_MARKERS -#define _DEFINE_MARKER(channel, name, tp_name_str, tp_cb, format, unique) \ - static const char __old_mstrtab_##channel##_##name[] \ - __attribute__((section("__old_markers_strings"))) \ - = #channel "\0" #name "\0" format; \ - struct registers regs; \ - static struct marker *__pmark_##channel##_##name; \ - static struct marker __old_mark_##channel##_##name \ - __attribute__((section("__old_markers"), aligned(8))) = \ - { __old_mstrtab_##channel##_##name, \ - &__old_mstrtab_##channel##_##name[sizeof(#channel)], \ - &__old_mstrtab_##channel##_##name[sizeof(#channel) + \ - sizeof(#name)], \ - 0, 0, 0, 0, marker_probe_cb, \ - { __mark_empty_function, NULL}, \ - NULL, tp_name_str, tp_cb, NULL }; \ - \ +#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); \ + \ /* 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. */ \ @@ -110,11 +101,13 @@ struct marker { "__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" \ ".section __markers,\"aw\",@progbits\n\t" \ ".align 8\n\t" \ - "__mark_struct_" XSTR(unique) ":\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 */ \ @@ -122,7 +115,7 @@ 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 */ \ + ".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 */ \ @@ -134,19 +127,15 @@ struct marker { ".previous\n\t" \ "1:\n\t" \ ); \ - asm volatile ( \ - "mov ""$__mark_struct_" XSTR(unique) ", %[pmark_struct]\n\t" \ - : [pmark_struct] "=r" (__pmark_##channel##_##name) :: "memory" \ - ); \ - \ + \ save_registers(®s) -#define DEFINE_MARKER(channel, name, format) \ - _DEFINE_MARKER(channel, name, NULL, NULL, format, __COUNTER__) +#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) \ - _DEFINE_MARKER(channel, name, #tp_name, tp_cb, format, __COUNTER__) +#define DEFINE_MARKER_TP(channel, name, tp_name, tp_cb, format, unique) \ + _DEFINE_MARKER(channel, name, #tp_name, tp_cb, format, unique) /* * Make sure the alignment of the structure in the __markers section will @@ -157,33 +146,45 @@ struct marker { * If generic is true, a variable read is used. * 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); \ + DEFINE_MARKER(channel, name, format, unique); \ __mark_check_format(format, ## args); \ if (!generic) { \ if (unlikely(imv_read( \ - __pmark_##channel##_##name->state))) \ - (*__pmark_##channel##_##name->call) \ - (__pmark_##channel##_##name, \ + 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); \ } else { \ if (unlikely(_imv_read( \ - __pmark_##channel##_##name->state))) \ - (__pmark_##channel##_##name->call) \ - (__pmark_##channel##_##name, \ + 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); \ } \ } while (0) -#define __trace_mark_tp(channel, name, call_private, tp_name, tp_cb, \ - format, args...) \ +#define __trace_mark_tp(channel, name, 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 { \ void __check_tp_type(void) \ { \ register_trace_##tp_name(tp_cb); \ } \ - DEFINE_MARKER_TP(channel, name, tp_name, tp_cb, format);\ + DEFINE_MARKER_TP(channel, name, tp_name, tp_cb, format, unique);\ __mark_check_format(format, ## args); \ (*__mark_##channel##_##name.call)(&__mark_##channel##_##name, \ call_private, ®s, ## args); \ @@ -235,8 +236,7 @@ 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)