#include <errno.h>
#include <asm/atomic.h>
#include <pthread.h>
+#include <stdint.h>
+#include <syscall.h>
+#include <linux/futex.h>
+
+#ifndef futex
+static inline _syscall6(long, futex, unsigned long, uaddr, int, op, int, val,
+ unsigned long, timeout, unsigned long, uaddr2, int, val2)
+#endif //futex
#ifndef LTT_N_SUBBUFS
(BUFFER_OFFSET(offset,buf)/buf->subbuf_size)
+#define LTT_TRACER_MAGIC_NUMBER 0x00D6B7ED
+#define LTT_TRACER_VERSION_MAJOR 0
+#define LTT_TRACER_VERSION_MINOR 7
+
+#ifndef atomic_cmpxchg
+#define atomic_cmpxchg(v, old, new) ((int)cmpxchg(&((v)->counter), old, new))
+#endif //atomic_cmpxchg
+struct ltt_trace_header {
+ uint32_t magic_number;
+ uint32_t arch_type;
+ uint32_t arch_variant;
+ uint32_t float_word_order; /* Only useful for user space traces */
+ uint8_t arch_size;
+ //uint32_t system_type;
+ uint8_t major_version;
+ uint8_t minor_version;
+ uint8_t flight_recorder;
+ uint8_t has_heartbeat;
+ uint8_t has_alignment; /* Event header alignment */
+ uint32_t freq_scale;
+ uint64_t start_freq;
+ uint64_t start_tsc;
+ uint64_t start_monotonic;
+ uint64_t start_time_sec;
+ uint64_t start_time_usec;
+} __attribute((packed));
+
+
+struct ltt_block_start_header {
+ struct {
+ uint64_t cycle_count;
+ uint64_t freq; /* khz */
+ } begin;
+ struct {
+ uint64_t cycle_count;
+ uint64_t freq; /* khz */
+ } end;
+ uint32_t lost_size; /* Size unused at the end of the buffer */
+ uint32_t buf_size; /* The size of this sub-buffer */
+ struct ltt_trace_header trace;
+} __attribute((packed));
+
+
+
struct ltt_buf {
+ void *start;
atomic_t offset;
atomic_t consumed;
atomic_t reserve_count[LTT_N_SUBBUFS];
atomic_t commit_count[LTT_N_SUBBUFS];
atomic_t events_lost;
+ atomic_t corrupted_subbuffers;
atomic_t full; /* futex on which the writer waits : 1 : full */
unsigned int alloc_size;
unsigned int subbuf_size;
} channel;
};
+
+
extern __thread struct ltt_trace_info *thread_trace_info;
void ltt_thread_init(void);
void ltt_usertrace_fast_buffer_switch(void);
+
+
+static inline uint64_t ltt_get_timestamp()
+{
+ return get_cycles();
+}
+
+static inline unsigned int ltt_subbuf_header_len(struct ltt_buf *buf)
+{
+ return sizeof(struct ltt_block_start_header);
+}
+
+
+
+static inline void ltt_write_trace_header(struct ltt_trace_header *header)
+{
+ header->magic_number = LTT_TRACER_MAGIC_NUMBER;
+ header->major_version = LTT_TRACER_VERSION_MAJOR;
+ header->minor_version = LTT_TRACER_VERSION_MINOR;
+ header->float_word_order = 0; //FIXME
+ header->arch_type = 0; //FIXME LTT_ARCH_TYPE;
+ header->arch_size = sizeof(void*);
+ header->arch_variant = 0; //FIXME LTT_ARCH_VARIANT;
+ header->flight_recorder = 0;
+ header->has_heartbeat = 0;
+
+#ifdef CONFIG_LTT_ALIGNMENT
+ header->has_alignment = sizeof(void*);
+#else
+ header->has_alignment = 0;
+#endif
+
+ //FIXME
+ header->freq_scale = 0;
+ header->start_freq = 0;
+ header->start_tsc = 0;
+ header->start_monotonic = 0;
+ header->start_time_sec = 0;
+ header->start_time_usec = 0;
+}
+
+
+static inline void ltt_buffer_begin_callback(struct ltt_buf *buf,
+ uint64_t tsc, unsigned int subbuf_idx)
+{
+ struct ltt_block_start_header *header =
+ (struct ltt_block_start_header*)
+ (buf->start + (subbuf_idx*buf->subbuf_size));
+
+ header->begin.cycle_count = tsc;
+ header->begin.freq = 0; //ltt_frequency();
+
+ header->lost_size = 0xFFFFFFFF; // for debugging...
+
+ header->buf_size = buf->subbuf_size;
+
+ ltt_write_trace_header(&header->trace);
+
+}
+
+
+
+static inline void ltt_buffer_end_callback(struct ltt_buf *buf,
+ uint64_t tsc, unsigned int offset, unsigned int subbuf_idx)
+{
+ struct ltt_block_start_header *header =
+ (struct ltt_block_start_header*)
+ (buf->start + (subbuf_idx*buf->subbuf_size));
+ /* offset is assumed to never be 0 here : never deliver a completely
+ * empty subbuffer. */
+ /* The lost size is between 0 and subbuf_size-1 */
+ header->lost_size = SUBBUF_OFFSET((buf->subbuf_size - offset),
+ buf);
+ header->end.cycle_count = tsc;
+ header->end.freq = 0; //ltt_frequency();
+}
+
+
+static inline void ltt_deliver_callback(struct ltt_buf *buf,
+ unsigned subbuf_idx,
+ void *subbuf)
+{
+ ltt_usertrace_fast_buffer_switch();
+}
#endif //_LTT_USERTRACE_FAST_H
projects / lttv.git / blobdiff