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Diffstat (limited to 'include/linux/marker.h')
| -rw-r--r-- | include/linux/marker.h | 221 |
1 files changed, 0 insertions, 221 deletions
diff --git a/include/linux/marker.h b/include/linux/marker.h deleted file mode 100644 index b85e74ca782..00000000000 --- a/include/linux/marker.h +++ /dev/null @@ -1,221 +0,0 @@ -#ifndef _LINUX_MARKER_H -#define _LINUX_MARKER_H - -/* - * Code markup for dynamic and static tracing. - * - * See Documentation/marker.txt. - * - * (C) Copyright 2006 Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> - * - * This file is released under the GPLv2. - * See the file COPYING for more details. - */ - -#include <stdarg.h> -#include <linux/types.h> - -struct module; -struct marker; - -/** - * marker_probe_func - Type of a marker probe function - * @probe_private: probe private data - * @call_private: call site private data - * @fmt: format string - * @args: variable argument list pointer. Use a pointer to overcome C's - * inability to pass this around as a pointer in a portable manner in - * the callee otherwise. - * - * Type of marker probe functions. They receive the mdata and need to parse the - * format string to recover the variable argument list. - */ -typedef void marker_probe_func(void *probe_private, void *call_private, - const char *fmt, va_list *args); - -struct marker_probe_closure { - marker_probe_func *func; /* Callback */ - void *probe_private; /* Private probe data */ -}; - -struct marker { - const char *name; /* Marker name */ - const char *format; /* Marker format string, describing the - * variable argument list. - */ - char state; /* Marker state. */ - char ptype; /* probe type : 0 : single, 1 : multi */ - /* Probe wrapper */ - void (*call)(const struct marker *mdata, void *call_private, ...); - struct marker_probe_closure single; - struct marker_probe_closure *multi; - const char *tp_name; /* Optional tracepoint name */ - void *tp_cb; /* Optional tracepoint callback */ -} __attribute__((aligned(8))); - -#ifdef CONFIG_MARKERS - -#define _DEFINE_MARKER(name, tp_name_str, tp_cb, format) \ - static const char __mstrtab_##name[] \ - __attribute__((section("__markers_strings"))) \ - = #name "\0" format; \ - static struct marker __mark_##name \ - __attribute__((section("__markers"), aligned(8))) = \ - { __mstrtab_##name, &__mstrtab_##name[sizeof(#name)], \ - 0, 0, marker_probe_cb, { __mark_empty_function, NULL},\ - NULL, tp_name_str, tp_cb } - -#define DEFINE_MARKER(name, format) \ - _DEFINE_MARKER(name, NULL, NULL, format) - -#define DEFINE_MARKER_TP(name, tp_name, tp_cb, format) \ - _DEFINE_MARKER(name, #tp_name, tp_cb, format) - -/* - * Note : the empty asm volatile with read constraint is used here instead of a - * "used" attribute to fix a gcc 4.1.x bug. - * Make sure the alignment of the structure in the __markers section will - * not add unwanted padding between the beginning of the section and the - * structure. Force alignment to the same alignment as the section start. - * - * The "generic" argument controls which marker enabling mechanism must be used. - * If generic is true, a variable read is used. - * If generic is false, immediate values are used. - */ -#define __trace_mark(generic, name, call_private, format, args...) \ - do { \ - DEFINE_MARKER(name, format); \ - __mark_check_format(format, ## args); \ - if (unlikely(__mark_##name.state)) { \ - (*__mark_##name.call) \ - (&__mark_##name, call_private, ## args);\ - } \ - } while (0) - -#define __trace_mark_tp(name, call_private, tp_name, tp_cb, format, args...) \ - do { \ - void __check_tp_type(void) \ - { \ - register_trace_##tp_name(tp_cb); \ - } \ - DEFINE_MARKER_TP(name, tp_name, tp_cb, format); \ - __mark_check_format(format, ## args); \ - (*__mark_##name.call)(&__mark_##name, call_private, \ - ## args); \ - } while (0) - -extern void marker_update_probe_range(struct marker *begin, - struct marker *end); - -#define GET_MARKER(name) (__mark_##name) - -#else /* !CONFIG_MARKERS */ -#define DEFINE_MARKER(name, tp_name, tp_cb, format) -#define __trace_mark(generic, name, call_private, format, args...) \ - __mark_check_format(format, ## args) -#define __trace_mark_tp(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(name) -#endif /* CONFIG_MARKERS */ - -/** - * trace_mark - Marker using code patching - * @name: marker name, not quoted. - * @format: format string - * @args...: variable argument list - * - * Places a marker using optimized code patching technique (imv_read()) - * to be enabled when immediate values are present. - */ -#define trace_mark(name, format, args...) \ - __trace_mark(0, name, NULL, format, ## args) - -/** - * _trace_mark - Marker using variable read - * @name: marker name, not quoted. - * @format: format string - * @args...: variable argument list - * - * 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). - */ -#define _trace_mark(name, format, args...) \ - __trace_mark(1, name, NULL, format, ## args) - -/** - * trace_mark_tp - Marker in a tracepoint callback - * @name: marker name, not quoted. - * @tp_name: tracepoint name, not quoted. - * @tp_cb: tracepoint callback. Should have an associated global symbol so it - * is not optimized away by the compiler (should not be static). - * @format: format string - * @args...: variable argument list - * - * Places a marker in a tracepoint callback. - */ -#define trace_mark_tp(name, tp_name, tp_cb, format, args...) \ - __trace_mark_tp(name, NULL, tp_name, tp_cb, format, ## args) - -/** - * MARK_NOARGS - Format string for a marker with no argument. - */ -#define MARK_NOARGS " " - -/* To be used for string format validity checking with gcc */ -static inline void __printf(1, 2) ___mark_check_format(const char *fmt, ...) -{ -} - -#define __mark_check_format(format, args...) \ - do { \ - if (0) \ - ___mark_check_format(format, ## args); \ - } while (0) - -extern marker_probe_func __mark_empty_function; - -extern void marker_probe_cb(const struct marker *mdata, - void *call_private, ...); - -/* - * Connect a probe to a marker. - * private data pointer must be a valid allocated memory address, or NULL. - */ -extern int marker_probe_register(const char *name, const char *format, - marker_probe_func *probe, void *probe_private); - -/* - * Returns the private data given to marker_probe_register. - */ -extern int marker_probe_unregister(const char *name, - marker_probe_func *probe, void *probe_private); -/* - * Unregister a marker by providing the registered private data. - */ -extern int marker_probe_unregister_private_data(marker_probe_func *probe, - void *probe_private); - -extern void *marker_get_private_data(const char *name, marker_probe_func *probe, - int num); - -/* - * marker_synchronize_unregister must be called between the last marker probe - * unregistration and the first one of - * - the end of module exit function - * - the free of any resource used by the probes - * to ensure the code and data are valid for any possibly running probes. - */ -#define marker_synchronize_unregister() synchronize_sched() - -#endif |