From: Pierre-Marc Fournier Date: Wed, 11 Nov 2009 21:47:06 +0000 (-0500) Subject: revert installation of tracer.h, but keep ust.h X-Git-Tag: v0.1~56 X-Git-Url: http://git.lttng.org./?a=commitdiff_plain;h=c93858f1db9c8fedb9cb3dc751c95ce77083c7ee;p=ust.git revert installation of tracer.h, but keep ust.h --- diff --git a/include/Makefile.am b/include/Makefile.am index 38973be..3f6ca1e 100644 --- a/include/Makefile.am +++ b/include/Makefile.am @@ -1,4 +1,4 @@ nobase_include_HEADERS = ust/immediate.h ust/kernelcompat.h ust/marker.h \ - ust/tracepoint.h ust/processor.h ust/tracer.h ust/ust.h + ust/tracepoint.h ust/processor.h ust/ust.h noinst_HEADERS = share.h usterr.h diff --git a/include/ust/tracer.h b/include/ust/tracer.h deleted file mode 100644 index 502cdcc..0000000 --- a/include/ust/tracer.h +++ /dev/null @@ -1,623 +0,0 @@ -/* - * Copyright (C) 2005,2006,2008 Mathieu Desnoyers (mathieu.desnoyers@polymtl.ca) - * Copyright (C) 2009 Pierre-Marc Fournier - * - * This contains the definitions for the Linux Trace Toolkit tracer. - * - * Ported to userspace by Pierre-Marc Fournier. - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#ifndef _LTT_TRACER_H -#define _LTT_TRACER_H - -#include -#include -//#include "list.h" -#include -#include "buffer.h" -#include "relay.h" -#include "channels.h" -#include "tracercore.h" -#include - -/* Number of bytes to log with a read/write event */ -#define LTT_LOG_RW_SIZE 32L - -/* Interval (in jiffies) at which the LTT per-CPU timer fires */ -#define LTT_PERCPU_TIMER_INTERVAL 1 - -#ifndef LTT_ARCH_TYPE -#define LTT_ARCH_TYPE LTT_ARCH_TYPE_UNDEFINED -#endif - -#ifndef LTT_ARCH_VARIANT -#define LTT_ARCH_VARIANT LTT_ARCH_VARIANT_NONE -#endif - -struct ltt_active_marker; - -/* Maximum number of callbacks per marker */ -#define LTT_NR_CALLBACKS 10 - -struct ltt_serialize_closure; -struct ltt_probe_private_data; - -/* Serialization callback '%k' */ -typedef size_t (*ltt_serialize_cb)(struct rchan_buf *buf, size_t buf_offset, - struct ltt_serialize_closure *closure, - void *serialize_private, 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; -}; - -extern size_t ltt_serialize_data(struct rchan_buf *buf, size_t buf_offset, - struct ltt_serialize_closure *closure, - void *serialize_private, - int *largest_align, const char *fmt, va_list *args); - -struct ltt_available_probe { - const char *name; /* probe name */ - const char *format; - marker_probe_func *probe_func; - ltt_serialize_cb callbacks[LTT_NR_CALLBACKS]; - struct list_head node; /* registered probes list */ -}; - -struct ltt_probe_private_data { - struct ltt_trace_struct *trace; /* - * Target trace, for metadata - * or statedump. - */ - ltt_serialize_cb serializer; /* - * Serialization function override. - */ - void *serialize_private; /* - * Private data for serialization - * functions. - */ -}; - -enum ltt_channels { - LTT_CHANNEL_METADATA, - LTT_CHANNEL_UST, -}; - -struct ltt_active_marker { - struct list_head node; /* active markers list */ - const char *channel; - const char *name; - const char *format; - struct ltt_available_probe *probe; -}; - -struct marker; //ust// -extern void ltt_vtrace(const struct marker *mdata, void *probe_data, - struct registers *regs, void *call_data, const char *fmt, va_list *args); -extern void ltt_trace(const struct marker *mdata, void *probe_data, - struct registers *regs, void *call_data, const char *fmt, ...); - -/* - * Unique ID assigned to each registered probe. - */ -enum marker_id { - MARKER_ID_SET_MARKER_ID = 0, /* Static IDs available (range 0-7) */ - MARKER_ID_SET_MARKER_FORMAT, - MARKER_ID_COMPACT, /* Compact IDs (range: 8-127) */ - MARKER_ID_DYNAMIC, /* Dynamic IDs (range: 128-65535) */ -}; - -/* static ids 0-1 reserved for internal use. */ -#define MARKER_CORE_IDS 2 -static inline enum marker_id marker_id_type(uint16_t id) -{ - if (id < MARKER_CORE_IDS) - return (enum marker_id)id; - else - return MARKER_ID_DYNAMIC; -} - -struct user_dbg_data { - unsigned long avail_size; - unsigned long write; - unsigned long read; -}; - -struct ltt_trace_ops { - /* First 32 bytes cache-hot cacheline */ - int (*reserve_slot) (struct ltt_trace_struct *trace, - struct ltt_channel_struct *channel, - void **transport_data, size_t data_size, - size_t *slot_size, long *buf_offset, u64 *tsc, - unsigned int *rflags, - int largest_align); -//ust// void (*commit_slot) (struct ltt_channel_struct *channel, -//ust// void **transport_data, long buf_offset, -//ust// size_t slot_size); - void (*wakeup_channel) (struct ltt_channel_struct *ltt_channel); - int (*user_blocking) (struct ltt_trace_struct *trace, - unsigned int index, size_t data_size, - struct user_dbg_data *dbg); - /* End of first 32 bytes cacheline */ - int (*create_dirs) (struct ltt_trace_struct *new_trace); - void (*remove_dirs) (struct ltt_trace_struct *new_trace); - int (*create_channel) (const char *trace_name, - struct ltt_trace_struct *trace, - struct dentry *dir, const char *channel_name, - struct ltt_channel_struct *ltt_chan, - unsigned int subbuf_size, - unsigned int n_subbufs, int overwrite); - void (*finish_channel) (struct ltt_channel_struct *channel); - void (*remove_channel) (struct ltt_channel_struct *channel); - void (*user_errors) (struct ltt_trace_struct *trace, - unsigned int index, size_t data_size, - struct user_dbg_data *dbg); -} ____cacheline_aligned; - -struct ltt_transport { - char *name; - struct module *owner; - struct list_head node; - struct ltt_trace_ops ops; -}; - -enum trace_mode { LTT_TRACE_NORMAL, LTT_TRACE_FLIGHT, LTT_TRACE_HYBRID }; - -#define CHANNEL_FLAG_ENABLE (1U<<0) -#define CHANNEL_FLAG_OVERWRITE (1U<<1) - -/* Per-trace information - each trace/flight recorder represented by one */ -struct ltt_trace_struct { - /* First 32 bytes cache-hot cacheline */ - struct list_head list; - struct ltt_trace_ops *ops; - int active; - /* Second 32 bytes cache-hot cacheline */ - struct ltt_channel_struct *channels; - unsigned int nr_channels; - u32 freq_scale; - u64 start_freq; - u64 start_tsc; - unsigned long long start_monotonic; - struct timeval start_time; - struct ltt_channel_setting *settings; - struct { - struct dentry *trace_root; - } dentry; - struct kref kref; /* Each channel has a kref of the trace struct */ - struct ltt_transport *transport; - struct kref ltt_transport_kref; - char trace_name[NAME_MAX]; -} ____cacheline_aligned; - -/* 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 ltt_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) - -/* - * We use asm/timex.h : cpu_khz/HZ variable in here : we might have to deal - * specifically with CPU frequency scaling someday, so using an interpolation - * between the start and end of buffer values is not flexible enough. Using an - * immediate frequency value permits to calculate directly the times for parts - * of a buffer that would be before a frequency change. - * - * Keep the natural field alignment for _each field_ within this structure if - * you ever add/remove a field from this header. Packed attribute is not used - * because gcc generates poor code on at least powerpc and mips. Don't ever - * let gcc add padding between the structure elements. - */ -struct ltt_subbuffer_header { - uint64_t cycle_count_begin; /* Cycle count at subbuffer start */ - uint64_t cycle_count_end; /* Cycle count at subbuffer end */ - uint32_t magic_number; /* - * Trace magic number. - * contains endianness information. - */ - uint8_t major_version; - uint8_t minor_version; - uint8_t arch_size; /* Architecture pointer size */ - uint8_t alignment; /* LTT data alignment */ - uint64_t start_time_sec; /* NTP-corrected start time */ - uint64_t start_time_usec; - uint64_t start_freq; /* - * Frequency at trace start, - * used all along the trace. - */ - uint32_t freq_scale; /* Frequency scaling (divisor) */ - uint32_t lost_size; /* Size unused at end of subbuffer */ - uint32_t buf_size; /* Size of this subbuffer */ - uint32_t events_lost; /* - * Events lost in this subbuffer since - * the beginning of the trace. - * (may overflow) - */ - uint32_t subbuf_corrupt; /* - * Corrupted (lost) subbuffers since - * the begginig of the trace. - * (may overflow) - */ - uint8_t header_end[0]; /* End of header */ -}; - -/** - * ltt_subbuffer_header_size - called on buffer-switch to a new sub-buffer - * - * Return header size without padding after the structure. Don't use packed - * structure because gcc generates inefficient code on some architectures - * (powerpc, mips..) - */ -static inline size_t ltt_subbuffer_header_size(void) -{ - return offsetof(struct ltt_subbuffer_header, header_end); -} - -/* - * ltt_get_header_size - * - * Calculate alignment offset to 32-bits. This is the alignment offset of the - * event header. - * - * Important note : - * The event header must be 32-bits. The total offset calculated here : - * - * Alignment of header struct on 32 bits (min arch size, header size) - * + sizeof(header struct) (32-bits) - * + (opt) u16 (ext. event id) - * + (opt) u16 (event_size) (if event_size == 0xFFFFUL, has ext. event size) - * + (opt) u32 (ext. event size) - * + (opt) u64 full TSC (aligned on min(64-bits, arch size)) - * - * The payload must itself determine its own alignment from the biggest type it - * contains. - * */ -static inline unsigned char ltt_get_header_size( - struct ltt_channel_struct *channel, - size_t offset, - size_t data_size, - size_t *before_hdr_pad, - unsigned int rflags) -{ - size_t orig_offset = offset; - size_t padding; - - padding = ltt_align(offset, sizeof(struct ltt_event_header)); - offset += padding; - offset += sizeof(struct ltt_event_header); - - switch (rflags) { - case LTT_RFLAG_ID_SIZE_TSC: - offset += sizeof(u16) + sizeof(u16); - if (data_size >= 0xFFFFU) - offset += sizeof(u32); - offset += ltt_align(offset, sizeof(u64)); - offset += sizeof(u64); - break; - case LTT_RFLAG_ID_SIZE: - offset += sizeof(u16) + sizeof(u16); - if (data_size >= 0xFFFFU) - offset += sizeof(u32); - break; - case LTT_RFLAG_ID: - offset += sizeof(u16); - break; - } - - *before_hdr_pad = padding; - return offset - orig_offset; -} - -/* - * ltt_write_event_header - * - * Writes the event header to the offset (already aligned on 32-bits). - * - * @trace : trace to write to. - * @channel : pointer to the channel structure.. - * @buf : buffer to write to. - * @buf_offset : buffer offset to write to (aligned on 32 bits). - * @eID : event ID - * @event_size : size of the event, excluding the event header. - * @tsc : time stamp counter. - * @rflags : reservation flags. - * - * returns : offset where the event data must be written. - */ -static inline size_t ltt_write_event_header(struct ltt_trace_struct *trace, - struct ltt_channel_struct *channel, - struct rchan_buf *buf, long buf_offset, - u16 eID, size_t event_size, - u64 tsc, unsigned int rflags) -{ - struct ltt_event_header header; - size_t small_size; - - switch (rflags) { - case LTT_RFLAG_ID_SIZE_TSC: - header.id_time = 29 << LTT_TSC_BITS; - break; - case LTT_RFLAG_ID_SIZE: - header.id_time = 30 << LTT_TSC_BITS; - break; - case LTT_RFLAG_ID: - header.id_time = 31 << LTT_TSC_BITS; - break; - default: - header.id_time = eID << LTT_TSC_BITS; - break; - } - header.id_time |= (u32)tsc & LTT_TSC_MASK; - ltt_relay_write(buf, buf_offset, &header, sizeof(header)); - buf_offset += sizeof(header); - - switch (rflags) { - case LTT_RFLAG_ID_SIZE_TSC: - small_size = min_t(size_t, event_size, 0xFFFFU); - ltt_relay_write(buf, buf_offset, - (u16[]){ (u16)eID }, sizeof(u16)); - buf_offset += sizeof(u16); - ltt_relay_write(buf, buf_offset, - (u16[]){ (u16)small_size }, sizeof(u16)); - buf_offset += sizeof(u16); - if (small_size == 0xFFFFU) { - ltt_relay_write(buf, buf_offset, - (u32[]){ (u32)event_size }, sizeof(u32)); - buf_offset += sizeof(u32); - } - buf_offset += ltt_align(buf_offset, sizeof(u64)); - ltt_relay_write(buf, buf_offset, - (u64[]){ (u64)tsc }, sizeof(u64)); - buf_offset += sizeof(u64); - break; - case LTT_RFLAG_ID_SIZE: - small_size = min_t(size_t, event_size, 0xFFFFU); - ltt_relay_write(buf, buf_offset, - (u16[]){ (u16)eID }, sizeof(u16)); - buf_offset += sizeof(u16); - ltt_relay_write(buf, buf_offset, - (u16[]){ (u16)small_size }, sizeof(u16)); - buf_offset += sizeof(u16); - if (small_size == 0xFFFFU) { - ltt_relay_write(buf, buf_offset, - (u32[]){ (u32)event_size }, sizeof(u32)); - buf_offset += sizeof(u32); - } - break; - case LTT_RFLAG_ID: - ltt_relay_write(buf, buf_offset, - (u16[]){ (u16)eID }, sizeof(u16)); - buf_offset += sizeof(u16); - break; - default: - break; - } - - return buf_offset; -} - -/* Lockless LTTng */ - -/* - * ltt_reserve_slot - * - * Atomic slot reservation in a LTTng buffer. It will take care of - * sub-buffer switching. - * - * Parameters: - * - * @trace : the trace structure to log to. - * @channel : the chanel to reserve space into. - * @transport_data : specific transport data. - * @data_size : size of the variable length data to log. - * @slot_size : pointer to total size of the slot (out) - * @buf_offset : pointer to reserve offset (out) - * @tsc : pointer to the tsc at the slot reservation (out) - * @rflags : reservation flags (header specificity) - * @cpu : cpu id - * - * Return : -ENOSPC if not enough space, else 0. - */ -static inline int ltt_reserve_slot( - struct ltt_trace_struct *trace, - struct ltt_channel_struct *channel, - void **transport_data, - size_t data_size, - size_t *slot_size, - long *buf_offset, - u64 *tsc, - unsigned int *rflags, - int largest_align) -{ - return trace->ops->reserve_slot(trace, channel, transport_data, - data_size, slot_size, buf_offset, tsc, rflags, - largest_align); -} - - -///* -// * ltt_commit_slot -// * -// * Atomic unordered slot commit. Increments the commit count in the -// * specified sub-buffer, and delivers it if necessary. -// * -// * Parameters: -// * -// * @channel : the chanel to reserve space into. -// * @transport_data : specific transport data. -// * @buf_offset : offset of beginning of reserved slot -// * @slot_size : size of the reserved slot. -// */ -//static inline void ltt_commit_slot( -// struct ltt_channel_struct *channel, -// void **transport_data, -// long buf_offset, -// size_t slot_size) -//{ -// struct ltt_trace_struct *trace = channel->trace; -// -// trace->ops->commit_slot(channel, transport_data, buf_offset, slot_size); -//} - -/* - * Control channels : - * control/metadata - * control/interrupts - * control/... - * - * cpu channel : - * cpu - */ - -#define LTT_METADATA_CHANNEL "metadata_state" -#define LTT_UST_CHANNEL "ust" - -#define LTT_FLIGHT_PREFIX "flight-" - -/* Tracer properties */ -//#define LTT_DEFAULT_SUBBUF_SIZE_LOW 134217728 -#define LTT_DEFAULT_SUBBUF_SIZE_LOW 65536 -//#define LTT_DEFAULT_SUBBUF_SIZE_LOW 4096 -#define LTT_DEFAULT_N_SUBBUFS_LOW 2 -//#define LTT_DEFAULT_SUBBUF_SIZE_MED 134217728 -#define LTT_DEFAULT_SUBBUF_SIZE_MED 262144 -//#define LTT_DEFAULT_SUBBUF_SIZE_MED 4096 -#define LTT_DEFAULT_N_SUBBUFS_MED 2 -//#define LTT_DEFAULT_SUBBUF_SIZE_HIGH 134217728 -#define LTT_DEFAULT_SUBBUF_SIZE_HIGH 1048576 -//#define LTT_DEFAULT_SUBBUF_SIZE_HIGH 4096 -#define LTT_DEFAULT_N_SUBBUFS_HIGH 2 -#define LTT_TRACER_MAGIC_NUMBER 0x00D6B7ED -#define LTT_TRACER_VERSION_MAJOR 2 -#define LTT_TRACER_VERSION_MINOR 3 - -/* - * 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 void ltt_transport_register(struct ltt_transport *transport); -extern void ltt_transport_unregister(struct ltt_transport *transport); - -/* Exported control function */ - -union ltt_control_args { - struct { - enum trace_mode mode; - unsigned int subbuf_size_low; - unsigned int n_subbufs_low; - unsigned int subbuf_size_med; - unsigned int n_subbufs_med; - unsigned int subbuf_size_high; - unsigned int n_subbufs_high; - } new_trace; -}; - -extern int _ltt_trace_setup(const char *trace_name); -extern int ltt_trace_setup(const char *trace_name); -extern struct ltt_trace_struct *_ltt_trace_find_setup(const char *trace_name); -extern int ltt_trace_set_type(const char *trace_name, const char *trace_type); -extern int ltt_trace_set_channel_subbufsize(const char *trace_name, - const char *channel_name, unsigned int size); -extern int ltt_trace_set_channel_subbufcount(const char *trace_name, - const char *channel_name, unsigned int cnt); -extern int ltt_trace_set_channel_enable(const char *trace_name, - const char *channel_name, unsigned int enable); -extern int ltt_trace_set_channel_overwrite(const char *trace_name, - const char *channel_name, unsigned int overwrite); -extern int ltt_trace_alloc(const char *trace_name); -extern int ltt_trace_destroy(const char *trace_name); -extern int ltt_trace_start(const char *trace_name); -extern int ltt_trace_stop(const char *trace_name); - -enum ltt_filter_control_msg { - LTT_FILTER_DEFAULT_ACCEPT, - LTT_FILTER_DEFAULT_REJECT -}; - -extern int ltt_filter_control(enum ltt_filter_control_msg msg, - const char *trace_name); - -extern struct dentry *get_filter_root(void); - -extern void ltt_write_trace_header(struct ltt_trace_struct *trace, - struct ltt_subbuffer_header *header); -extern void ltt_buffer_destroy(struct ltt_channel_struct *ltt_chan); - -extern void ltt_core_register(int (*function)(u8, void *)); - -extern void ltt_core_unregister(void); - -extern void ltt_release_trace(struct kref *kref); -extern void ltt_release_transport(struct kref *kref); - -extern int ltt_probe_register(struct ltt_available_probe *pdata); -extern int ltt_probe_unregister(struct ltt_available_probe *pdata); -extern int ltt_marker_connect(const char *channel, const char *mname, - const char *pname); -extern int ltt_marker_disconnect(const char *channel, const char *mname, - const char *pname); -extern void ltt_dump_marker_state(struct ltt_trace_struct *trace); - -extern void ltt_lock_traces(void); -extern void ltt_unlock_traces(void); - -extern struct ltt_trace_struct *_ltt_trace_find(const char *trace_name); - -#endif /* _LTT_TRACER_H */ diff --git a/include/ust/ust.h b/include/ust/ust.h index 158805c..df2a7ae 100644 --- a/include/ust/ust.h +++ b/include/ust/ust.h @@ -7,6 +7,5 @@ #include #include #include -#include #endif /* UST_H */ diff --git a/libust/Makefile.am b/libust/Makefile.am index e23b5c9..6d99d0d 100644 --- a/libust/Makefile.am +++ b/libust/Makefile.am @@ -1,7 +1,7 @@ AM_CPPFLAGS = -I$(top_srcdir)/include -I$(top_srcdir)/libustcomm lib_LTLIBRARIES = libust.la -libust_la_SOURCES = buffer.h marker.c tracepoint.c channels.c channels.h marker-control.c marker-control.h relay.c relay.h tracer.c tracercore.c tracercore.h serialize.c tracectl.c $(top_builddir)/libustcomm/ustcomm.c +libust_la_SOURCES = buffer.h marker.c tracepoint.c channels.c channels.h marker-control.c marker-control.h relay.c relay.h tracer.c tracer.h tracercore.c tracercore.h serialize.c tracectl.c $(top_builddir)/libustcomm/ustcomm.c libust_la_LDFLAGS = -no-undefined -version-info 0:0:0 libust_la_LIBADD = -lpthread libust_la_CFLAGS = -DUST_COMPONENT="libust" diff --git a/libust/marker-control.c b/libust/marker-control.c index e88f001..a0786ba 100644 --- a/libust/marker-control.c +++ b/libust/marker-control.c @@ -35,7 +35,7 @@ #include //#include "list.h" -#include +#include "tracer.h" #include "usterr.h" #define DEFAULT_CHANNEL "cpu" diff --git a/libust/marker.c b/libust/marker.c index 146fbc9..47b6d11 100644 --- a/libust/marker.c +++ b/libust/marker.c @@ -36,10 +36,10 @@ #include #include -#include #include "usterr.h" #include "channels.h" #include "tracercore.h" +#include "tracer.h" __thread long ust_reg_stack[500]; volatile __thread long *ust_reg_stack_ptr = (long *) 0; diff --git a/libust/relay.c b/libust/relay.c index b6a2181..408ce90 100644 --- a/libust/relay.c +++ b/libust/relay.c @@ -31,7 +31,7 @@ #include "relay.h" #include "channels.h" #include -#include +#include "tracer.h" #include "tracercore.h" #include "usterr.h" diff --git a/libust/serialize.c b/libust/serialize.c index ee8b828..b1859ed 100644 --- a/libust/serialize.c +++ b/libust/serialize.c @@ -39,7 +39,7 @@ #include #include "relay.h" -#include +#include "tracer.h" //#include "list.h" #include "usterr.h" diff --git a/libust/tracectl.c b/libust/tracectl.c index 6fb089d..e28b315 100644 --- a/libust/tracectl.c +++ b/libust/tracectl.c @@ -30,7 +30,7 @@ #include #include -#include +#include "tracer.h" #include "usterr.h" #include "ustcomm.h" #include "relay.h" /* FIXME: remove */ diff --git a/libust/tracer.c b/libust/tracer.c index ce3bfd0..a3ace72 100644 --- a/libust/tracer.c +++ b/libust/tracer.c @@ -55,8 +55,8 @@ #include #include -#include #include "tracercore.h" +#include "tracer.h" #include "usterr.h" //ust// static void async_wakeup(unsigned long data); diff --git a/libust/tracer.h b/libust/tracer.h new file mode 100644 index 0000000..502cdcc --- /dev/null +++ b/libust/tracer.h @@ -0,0 +1,623 @@ +/* + * Copyright (C) 2005,2006,2008 Mathieu Desnoyers (mathieu.desnoyers@polymtl.ca) + * Copyright (C) 2009 Pierre-Marc Fournier + * + * This contains the definitions for the Linux Trace Toolkit tracer. + * + * Ported to userspace by Pierre-Marc Fournier. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef _LTT_TRACER_H +#define _LTT_TRACER_H + +#include +#include +//#include "list.h" +#include +#include "buffer.h" +#include "relay.h" +#include "channels.h" +#include "tracercore.h" +#include + +/* Number of bytes to log with a read/write event */ +#define LTT_LOG_RW_SIZE 32L + +/* Interval (in jiffies) at which the LTT per-CPU timer fires */ +#define LTT_PERCPU_TIMER_INTERVAL 1 + +#ifndef LTT_ARCH_TYPE +#define LTT_ARCH_TYPE LTT_ARCH_TYPE_UNDEFINED +#endif + +#ifndef LTT_ARCH_VARIANT +#define LTT_ARCH_VARIANT LTT_ARCH_VARIANT_NONE +#endif + +struct ltt_active_marker; + +/* Maximum number of callbacks per marker */ +#define LTT_NR_CALLBACKS 10 + +struct ltt_serialize_closure; +struct ltt_probe_private_data; + +/* Serialization callback '%k' */ +typedef size_t (*ltt_serialize_cb)(struct rchan_buf *buf, size_t buf_offset, + struct ltt_serialize_closure *closure, + void *serialize_private, 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; +}; + +extern size_t ltt_serialize_data(struct rchan_buf *buf, size_t buf_offset, + struct ltt_serialize_closure *closure, + void *serialize_private, + int *largest_align, const char *fmt, va_list *args); + +struct ltt_available_probe { + const char *name; /* probe name */ + const char *format; + marker_probe_func *probe_func; + ltt_serialize_cb callbacks[LTT_NR_CALLBACKS]; + struct list_head node; /* registered probes list */ +}; + +struct ltt_probe_private_data { + struct ltt_trace_struct *trace; /* + * Target trace, for metadata + * or statedump. + */ + ltt_serialize_cb serializer; /* + * Serialization function override. + */ + void *serialize_private; /* + * Private data for serialization + * functions. + */ +}; + +enum ltt_channels { + LTT_CHANNEL_METADATA, + LTT_CHANNEL_UST, +}; + +struct ltt_active_marker { + struct list_head node; /* active markers list */ + const char *channel; + const char *name; + const char *format; + struct ltt_available_probe *probe; +}; + +struct marker; //ust// +extern void ltt_vtrace(const struct marker *mdata, void *probe_data, + struct registers *regs, void *call_data, const char *fmt, va_list *args); +extern void ltt_trace(const struct marker *mdata, void *probe_data, + struct registers *regs, void *call_data, const char *fmt, ...); + +/* + * Unique ID assigned to each registered probe. + */ +enum marker_id { + MARKER_ID_SET_MARKER_ID = 0, /* Static IDs available (range 0-7) */ + MARKER_ID_SET_MARKER_FORMAT, + MARKER_ID_COMPACT, /* Compact IDs (range: 8-127) */ + MARKER_ID_DYNAMIC, /* Dynamic IDs (range: 128-65535) */ +}; + +/* static ids 0-1 reserved for internal use. */ +#define MARKER_CORE_IDS 2 +static inline enum marker_id marker_id_type(uint16_t id) +{ + if (id < MARKER_CORE_IDS) + return (enum marker_id)id; + else + return MARKER_ID_DYNAMIC; +} + +struct user_dbg_data { + unsigned long avail_size; + unsigned long write; + unsigned long read; +}; + +struct ltt_trace_ops { + /* First 32 bytes cache-hot cacheline */ + int (*reserve_slot) (struct ltt_trace_struct *trace, + struct ltt_channel_struct *channel, + void **transport_data, size_t data_size, + size_t *slot_size, long *buf_offset, u64 *tsc, + unsigned int *rflags, + int largest_align); +//ust// void (*commit_slot) (struct ltt_channel_struct *channel, +//ust// void **transport_data, long buf_offset, +//ust// size_t slot_size); + void (*wakeup_channel) (struct ltt_channel_struct *ltt_channel); + int (*user_blocking) (struct ltt_trace_struct *trace, + unsigned int index, size_t data_size, + struct user_dbg_data *dbg); + /* End of first 32 bytes cacheline */ + int (*create_dirs) (struct ltt_trace_struct *new_trace); + void (*remove_dirs) (struct ltt_trace_struct *new_trace); + int (*create_channel) (const char *trace_name, + struct ltt_trace_struct *trace, + struct dentry *dir, const char *channel_name, + struct ltt_channel_struct *ltt_chan, + unsigned int subbuf_size, + unsigned int n_subbufs, int overwrite); + void (*finish_channel) (struct ltt_channel_struct *channel); + void (*remove_channel) (struct ltt_channel_struct *channel); + void (*user_errors) (struct ltt_trace_struct *trace, + unsigned int index, size_t data_size, + struct user_dbg_data *dbg); +} ____cacheline_aligned; + +struct ltt_transport { + char *name; + struct module *owner; + struct list_head node; + struct ltt_trace_ops ops; +}; + +enum trace_mode { LTT_TRACE_NORMAL, LTT_TRACE_FLIGHT, LTT_TRACE_HYBRID }; + +#define CHANNEL_FLAG_ENABLE (1U<<0) +#define CHANNEL_FLAG_OVERWRITE (1U<<1) + +/* Per-trace information - each trace/flight recorder represented by one */ +struct ltt_trace_struct { + /* First 32 bytes cache-hot cacheline */ + struct list_head list; + struct ltt_trace_ops *ops; + int active; + /* Second 32 bytes cache-hot cacheline */ + struct ltt_channel_struct *channels; + unsigned int nr_channels; + u32 freq_scale; + u64 start_freq; + u64 start_tsc; + unsigned long long start_monotonic; + struct timeval start_time; + struct ltt_channel_setting *settings; + struct { + struct dentry *trace_root; + } dentry; + struct kref kref; /* Each channel has a kref of the trace struct */ + struct ltt_transport *transport; + struct kref ltt_transport_kref; + char trace_name[NAME_MAX]; +} ____cacheline_aligned; + +/* 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 ltt_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) + +/* + * We use asm/timex.h : cpu_khz/HZ variable in here : we might have to deal + * specifically with CPU frequency scaling someday, so using an interpolation + * between the start and end of buffer values is not flexible enough. Using an + * immediate frequency value permits to calculate directly the times for parts + * of a buffer that would be before a frequency change. + * + * Keep the natural field alignment for _each field_ within this structure if + * you ever add/remove a field from this header. Packed attribute is not used + * because gcc generates poor code on at least powerpc and mips. Don't ever + * let gcc add padding between the structure elements. + */ +struct ltt_subbuffer_header { + uint64_t cycle_count_begin; /* Cycle count at subbuffer start */ + uint64_t cycle_count_end; /* Cycle count at subbuffer end */ + uint32_t magic_number; /* + * Trace magic number. + * contains endianness information. + */ + uint8_t major_version; + uint8_t minor_version; + uint8_t arch_size; /* Architecture pointer size */ + uint8_t alignment; /* LTT data alignment */ + uint64_t start_time_sec; /* NTP-corrected start time */ + uint64_t start_time_usec; + uint64_t start_freq; /* + * Frequency at trace start, + * used all along the trace. + */ + uint32_t freq_scale; /* Frequency scaling (divisor) */ + uint32_t lost_size; /* Size unused at end of subbuffer */ + uint32_t buf_size; /* Size of this subbuffer */ + uint32_t events_lost; /* + * Events lost in this subbuffer since + * the beginning of the trace. + * (may overflow) + */ + uint32_t subbuf_corrupt; /* + * Corrupted (lost) subbuffers since + * the begginig of the trace. + * (may overflow) + */ + uint8_t header_end[0]; /* End of header */ +}; + +/** + * ltt_subbuffer_header_size - called on buffer-switch to a new sub-buffer + * + * Return header size without padding after the structure. Don't use packed + * structure because gcc generates inefficient code on some architectures + * (powerpc, mips..) + */ +static inline size_t ltt_subbuffer_header_size(void) +{ + return offsetof(struct ltt_subbuffer_header, header_end); +} + +/* + * ltt_get_header_size + * + * Calculate alignment offset to 32-bits. This is the alignment offset of the + * event header. + * + * Important note : + * The event header must be 32-bits. The total offset calculated here : + * + * Alignment of header struct on 32 bits (min arch size, header size) + * + sizeof(header struct) (32-bits) + * + (opt) u16 (ext. event id) + * + (opt) u16 (event_size) (if event_size == 0xFFFFUL, has ext. event size) + * + (opt) u32 (ext. event size) + * + (opt) u64 full TSC (aligned on min(64-bits, arch size)) + * + * The payload must itself determine its own alignment from the biggest type it + * contains. + * */ +static inline unsigned char ltt_get_header_size( + struct ltt_channel_struct *channel, + size_t offset, + size_t data_size, + size_t *before_hdr_pad, + unsigned int rflags) +{ + size_t orig_offset = offset; + size_t padding; + + padding = ltt_align(offset, sizeof(struct ltt_event_header)); + offset += padding; + offset += sizeof(struct ltt_event_header); + + switch (rflags) { + case LTT_RFLAG_ID_SIZE_TSC: + offset += sizeof(u16) + sizeof(u16); + if (data_size >= 0xFFFFU) + offset += sizeof(u32); + offset += ltt_align(offset, sizeof(u64)); + offset += sizeof(u64); + break; + case LTT_RFLAG_ID_SIZE: + offset += sizeof(u16) + sizeof(u16); + if (data_size >= 0xFFFFU) + offset += sizeof(u32); + break; + case LTT_RFLAG_ID: + offset += sizeof(u16); + break; + } + + *before_hdr_pad = padding; + return offset - orig_offset; +} + +/* + * ltt_write_event_header + * + * Writes the event header to the offset (already aligned on 32-bits). + * + * @trace : trace to write to. + * @channel : pointer to the channel structure.. + * @buf : buffer to write to. + * @buf_offset : buffer offset to write to (aligned on 32 bits). + * @eID : event ID + * @event_size : size of the event, excluding the event header. + * @tsc : time stamp counter. + * @rflags : reservation flags. + * + * returns : offset where the event data must be written. + */ +static inline size_t ltt_write_event_header(struct ltt_trace_struct *trace, + struct ltt_channel_struct *channel, + struct rchan_buf *buf, long buf_offset, + u16 eID, size_t event_size, + u64 tsc, unsigned int rflags) +{ + struct ltt_event_header header; + size_t small_size; + + switch (rflags) { + case LTT_RFLAG_ID_SIZE_TSC: + header.id_time = 29 << LTT_TSC_BITS; + break; + case LTT_RFLAG_ID_SIZE: + header.id_time = 30 << LTT_TSC_BITS; + break; + case LTT_RFLAG_ID: + header.id_time = 31 << LTT_TSC_BITS; + break; + default: + header.id_time = eID << LTT_TSC_BITS; + break; + } + header.id_time |= (u32)tsc & LTT_TSC_MASK; + ltt_relay_write(buf, buf_offset, &header, sizeof(header)); + buf_offset += sizeof(header); + + switch (rflags) { + case LTT_RFLAG_ID_SIZE_TSC: + small_size = min_t(size_t, event_size, 0xFFFFU); + ltt_relay_write(buf, buf_offset, + (u16[]){ (u16)eID }, sizeof(u16)); + buf_offset += sizeof(u16); + ltt_relay_write(buf, buf_offset, + (u16[]){ (u16)small_size }, sizeof(u16)); + buf_offset += sizeof(u16); + if (small_size == 0xFFFFU) { + ltt_relay_write(buf, buf_offset, + (u32[]){ (u32)event_size }, sizeof(u32)); + buf_offset += sizeof(u32); + } + buf_offset += ltt_align(buf_offset, sizeof(u64)); + ltt_relay_write(buf, buf_offset, + (u64[]){ (u64)tsc }, sizeof(u64)); + buf_offset += sizeof(u64); + break; + case LTT_RFLAG_ID_SIZE: + small_size = min_t(size_t, event_size, 0xFFFFU); + ltt_relay_write(buf, buf_offset, + (u16[]){ (u16)eID }, sizeof(u16)); + buf_offset += sizeof(u16); + ltt_relay_write(buf, buf_offset, + (u16[]){ (u16)small_size }, sizeof(u16)); + buf_offset += sizeof(u16); + if (small_size == 0xFFFFU) { + ltt_relay_write(buf, buf_offset, + (u32[]){ (u32)event_size }, sizeof(u32)); + buf_offset += sizeof(u32); + } + break; + case LTT_RFLAG_ID: + ltt_relay_write(buf, buf_offset, + (u16[]){ (u16)eID }, sizeof(u16)); + buf_offset += sizeof(u16); + break; + default: + break; + } + + return buf_offset; +} + +/* Lockless LTTng */ + +/* + * ltt_reserve_slot + * + * Atomic slot reservation in a LTTng buffer. It will take care of + * sub-buffer switching. + * + * Parameters: + * + * @trace : the trace structure to log to. + * @channel : the chanel to reserve space into. + * @transport_data : specific transport data. + * @data_size : size of the variable length data to log. + * @slot_size : pointer to total size of the slot (out) + * @buf_offset : pointer to reserve offset (out) + * @tsc : pointer to the tsc at the slot reservation (out) + * @rflags : reservation flags (header specificity) + * @cpu : cpu id + * + * Return : -ENOSPC if not enough space, else 0. + */ +static inline int ltt_reserve_slot( + struct ltt_trace_struct *trace, + struct ltt_channel_struct *channel, + void **transport_data, + size_t data_size, + size_t *slot_size, + long *buf_offset, + u64 *tsc, + unsigned int *rflags, + int largest_align) +{ + return trace->ops->reserve_slot(trace, channel, transport_data, + data_size, slot_size, buf_offset, tsc, rflags, + largest_align); +} + + +///* +// * ltt_commit_slot +// * +// * Atomic unordered slot commit. Increments the commit count in the +// * specified sub-buffer, and delivers it if necessary. +// * +// * Parameters: +// * +// * @channel : the chanel to reserve space into. +// * @transport_data : specific transport data. +// * @buf_offset : offset of beginning of reserved slot +// * @slot_size : size of the reserved slot. +// */ +//static inline void ltt_commit_slot( +// struct ltt_channel_struct *channel, +// void **transport_data, +// long buf_offset, +// size_t slot_size) +//{ +// struct ltt_trace_struct *trace = channel->trace; +// +// trace->ops->commit_slot(channel, transport_data, buf_offset, slot_size); +//} + +/* + * Control channels : + * control/metadata + * control/interrupts + * control/... + * + * cpu channel : + * cpu + */ + +#define LTT_METADATA_CHANNEL "metadata_state" +#define LTT_UST_CHANNEL "ust" + +#define LTT_FLIGHT_PREFIX "flight-" + +/* Tracer properties */ +//#define LTT_DEFAULT_SUBBUF_SIZE_LOW 134217728 +#define LTT_DEFAULT_SUBBUF_SIZE_LOW 65536 +//#define LTT_DEFAULT_SUBBUF_SIZE_LOW 4096 +#define LTT_DEFAULT_N_SUBBUFS_LOW 2 +//#define LTT_DEFAULT_SUBBUF_SIZE_MED 134217728 +#define LTT_DEFAULT_SUBBUF_SIZE_MED 262144 +//#define LTT_DEFAULT_SUBBUF_SIZE_MED 4096 +#define LTT_DEFAULT_N_SUBBUFS_MED 2 +//#define LTT_DEFAULT_SUBBUF_SIZE_HIGH 134217728 +#define LTT_DEFAULT_SUBBUF_SIZE_HIGH 1048576 +//#define LTT_DEFAULT_SUBBUF_SIZE_HIGH 4096 +#define LTT_DEFAULT_N_SUBBUFS_HIGH 2 +#define LTT_TRACER_MAGIC_NUMBER 0x00D6B7ED +#define LTT_TRACER_VERSION_MAJOR 2 +#define LTT_TRACER_VERSION_MINOR 3 + +/* + * 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 void ltt_transport_register(struct ltt_transport *transport); +extern void ltt_transport_unregister(struct ltt_transport *transport); + +/* Exported control function */ + +union ltt_control_args { + struct { + enum trace_mode mode; + unsigned int subbuf_size_low; + unsigned int n_subbufs_low; + unsigned int subbuf_size_med; + unsigned int n_subbufs_med; + unsigned int subbuf_size_high; + unsigned int n_subbufs_high; + } new_trace; +}; + +extern int _ltt_trace_setup(const char *trace_name); +extern int ltt_trace_setup(const char *trace_name); +extern struct ltt_trace_struct *_ltt_trace_find_setup(const char *trace_name); +extern int ltt_trace_set_type(const char *trace_name, const char *trace_type); +extern int ltt_trace_set_channel_subbufsize(const char *trace_name, + const char *channel_name, unsigned int size); +extern int ltt_trace_set_channel_subbufcount(const char *trace_name, + const char *channel_name, unsigned int cnt); +extern int ltt_trace_set_channel_enable(const char *trace_name, + const char *channel_name, unsigned int enable); +extern int ltt_trace_set_channel_overwrite(const char *trace_name, + const char *channel_name, unsigned int overwrite); +extern int ltt_trace_alloc(const char *trace_name); +extern int ltt_trace_destroy(const char *trace_name); +extern int ltt_trace_start(const char *trace_name); +extern int ltt_trace_stop(const char *trace_name); + +enum ltt_filter_control_msg { + LTT_FILTER_DEFAULT_ACCEPT, + LTT_FILTER_DEFAULT_REJECT +}; + +extern int ltt_filter_control(enum ltt_filter_control_msg msg, + const char *trace_name); + +extern struct dentry *get_filter_root(void); + +extern void ltt_write_trace_header(struct ltt_trace_struct *trace, + struct ltt_subbuffer_header *header); +extern void ltt_buffer_destroy(struct ltt_channel_struct *ltt_chan); + +extern void ltt_core_register(int (*function)(u8, void *)); + +extern void ltt_core_unregister(void); + +extern void ltt_release_trace(struct kref *kref); +extern void ltt_release_transport(struct kref *kref); + +extern int ltt_probe_register(struct ltt_available_probe *pdata); +extern int ltt_probe_unregister(struct ltt_available_probe *pdata); +extern int ltt_marker_connect(const char *channel, const char *mname, + const char *pname); +extern int ltt_marker_disconnect(const char *channel, const char *mname, + const char *pname); +extern void ltt_dump_marker_state(struct ltt_trace_struct *trace); + +extern void ltt_lock_traces(void); +extern void ltt_unlock_traces(void); + +extern struct ltt_trace_struct *_ltt_trace_find(const char *trace_name); + +#endif /* _LTT_TRACER_H */ diff --git a/ustd/lowlevel.c b/ustd/lowlevel.c index dbe03c1..6a91acc 100644 --- a/ustd/lowlevel.c +++ b/ustd/lowlevel.c @@ -17,7 +17,7 @@ #include -#include +#include "tracer.h" #include "ustd.h" #include "usterr.h"