X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=ltt-tracer.h;h=a21c38ca3f330f660dbd29f7f5c374935669962f;hb=4ea00e4f764eb18686121161a98e4ef442fed2c0;hp=f1cd2d90f75e4d258f335c400a6c0aa759c9533c;hpb=d793d5e111fe1436fb8e15daa5d7fb1be8987bb4;p=lttng-modules.git diff --git a/ltt-tracer.h b/ltt-tracer.h index f1cd2d90..a21c38ca 100644 --- a/ltt-tracer.h +++ b/ltt-tracer.h @@ -1,14 +1,16 @@ +#ifndef _LTT_TRACER_H +#define _LTT_TRACER_H + /* - * Copyright (C) 2005,2006,2008 Mathieu Desnoyers (mathieu.desnoyers@polymtl.ca) + * ltt-tracer.h + * + * Copyright (C) 2005-2011 Mathieu Desnoyers * * This contains the definitions for the Linux Trace Toolkit tracer. * * Dual LGPL v2.1/GPL v2 license. */ -#ifndef _LTT_TRACER_H -#define _LTT_TRACER_H - #include #include #include @@ -23,117 +25,33 @@ #include "ltt-tracer-core.h" #include "ltt-events.h" +#define LTTNG_VERSION 0 +#define LTTNG_PATCHLEVEL 9 +#define LTTNG_SUBLEVEL 1 + #ifndef CHAR_BIT #define CHAR_BIT 8 #endif /* Number of bytes to log with a read/write event */ #define LTT_LOG_RW_SIZE 32L - -/* Maximum number of callbacks per marker */ -#define LTT_NR_CALLBACKS 10 - -struct ltt_serialize_closure; - -/* Serialization callback */ -typedef size_t (*ltt_serialize_cb)(struct lib_ring_buffer *buf, - size_t buf_offset, - struct ltt_serialize_closure *closure, - void *serialize_private, - unsigned int stack_pos_ctx, - int *largest_align, - const char *fmt, va_list *args); - -struct ltt_serialize_closure { - ltt_serialize_cb *callbacks; - long cb_args[LTT_NR_CALLBACKS]; - unsigned int cb_idx; -}; - -size_t ltt_serialize_data(struct lib_ring_buffer *buf, size_t buf_offset, - struct ltt_serialize_closure *closure, - void *serialize_private, unsigned int stack_pos_ctx, - int *largest_align, const char *fmt, va_list *args); - -enum ltt_channels { - LTT_CHANNEL_METADATA, - LTT_CHANNEL_FD_STATE, - LTT_CHANNEL_GLOBAL_STATE, - LTT_CHANNEL_IRQ_STATE, - LTT_CHANNEL_MODULE_STATE, - LTT_CHANNEL_NETIF_STATE, - LTT_CHANNEL_SOFTIRQ_STATE, - LTT_CHANNEL_SWAP_STATE, - LTT_CHANNEL_SYSCALL_STATE, - LTT_CHANNEL_TASK_STATE, - LTT_CHANNEL_VM_STATE, - LTT_CHANNEL_FS, - LTT_CHANNEL_INPUT, - LTT_CHANNEL_IPC, - LTT_CHANNEL_KERNEL, - LTT_CHANNEL_MM, - LTT_CHANNEL_RCU, - LTT_CHANNEL_DEFAULT, -}; - -/* - * Hardcoded event headers - * - * event header for a trace with active heartbeat : 27 bits timestamps - * - * headers are 32-bits aligned. In order to insure such alignment, a dynamic per - * trace alignment value must be done. - * - * Remember that the C compiler does align each member on the boundary - * equivalent to their own size. - * - * As relay subbuffers are aligned on pages, we are sure that they are 4 and 8 - * bytes aligned, so the buffer header and trace header are aligned. - * - * Event headers are aligned depending on the trace alignment option. - * - * Note using C structure bitfields for cross-endianness and portability - * concerns. - */ - -#define LTT_RESERVED_EVENTS 3 -#define LTT_EVENT_BITS 5 -#define LTT_FREE_EVENTS ((1 << LTT_EVENT_BITS) - LTT_RESERVED_EVENTS) -#define LTT_TSC_BITS 27 -#define LTT_TSC_MASK ((1 << LTT_TSC_BITS) - 1) - -struct event_header { - u32 id_time; /* 5 bits event id (MSB); 27 bits time (LSB) */ -}; - -/* Reservation flags */ -#define LTT_RFLAG_ID (1 << 0) -#define LTT_RFLAG_ID_SIZE (1 << 1) -#define LTT_RFLAG_ID_SIZE_TSC (1 << 2) - #define LTT_MAX_SMALL_SIZE 0xFFFFU #ifdef RING_BUFFER_ALIGN -static inline -size_t ltt_get_header_alignment(void) -{ - return sizeof(struct event_header) * CHAR_BIT; -} - #define ltt_alignof(type) __alignof__(type) #else -static inline -size_t ltt_get_header_alignment(void) -{ - return CHAR_BIT; -} - #define ltt_alignof(type) 1 #endif /* Tracer properties */ #define CTF_MAGIC_NUMBER 0xC1FC1FC1 #define TSDL_MAGIC_NUMBER 0x75D11D57 + +/* CTF specification version followed */ +#define CTF_SPEC_MAJOR 1 +#define CTF_SPEC_MINOR 8 + +/* Tracer major/minor versions */ #define CTF_VERSION_MAJOR 0 #define CTF_VERSION_MINOR 1 @@ -143,50 +61,7 @@ size_t ltt_get_header_alignment(void) */ #define LTTNG_METADATA_TIMEOUT_MSEC 10000 -/* - * Size reserved for high priority events (interrupts, NMI, BH) at the end of a - * nearly full buffer. User space won't use this last amount of space when in - * blocking mode. This space also includes the event header that would be - * written by this user space event. - */ -#define LTT_RESERVE_CRITICAL 4096 - -/* Register and unregister function pointers */ - -enum ltt_module_function { - LTT_FUNCTION_RUN_FILTER, - LTT_FUNCTION_FILTER_CONTROL, - LTT_FUNCTION_STATEDUMP -}; - -extern int ltt_module_register(enum ltt_module_function name, void *function, - struct module *owner); -extern void ltt_module_unregister(enum ltt_module_function name); - -/* Exported control function */ - -void ltt_core_register(int (*function)(u8, void *)); - -void ltt_core_unregister(void); - -extern -void ltt_statedump_register_kprobes_dump(void (*callback)(void *call_data)); -extern -void ltt_statedump_unregister_kprobes_dump(void (*callback)(void *call_data)); - -extern void ltt_dump_softirq_vec(void *call_data); - -#ifdef CONFIG_HAVE_LTT_DUMP_TABLES -extern void ltt_dump_sys_call_table(void *call_data); -extern void ltt_dump_idt_table(void *call_data); -#else -static inline void ltt_dump_sys_call_table(void *call_data) -{ -} - -static inline void ltt_dump_idt_table(void *call_data) -{ -} -#endif +#define LTT_RFLAG_EXTENDED RING_BUFFER_RFLAG_END +#define LTT_RFLAG_END (LTT_RFLAG_EXTENDED << 1) #endif /* _LTT_TRACER_H */