trace-events

   1 # Trace events for debugging and performance instrumentation
   2 #
   3 # This file is processed by the tracetool script during the build.
   4 #
   5 # To add a new trace event:
   6 #
   7 # 1. Choose a name for the trace event.  Declare its arguments and format
   8 #    string.
   9 #
  10 # 2. Call the trace event from code using trace_##name, e.g. multiwrite_cb() ->
  11 #    trace_multiwrite_cb().  The source file must #include "trace.h".
  12 #
  13 # Format of a trace event:
  14 #
  15 # [disable] <name>(<type1> <arg1>[, <type2> <arg2>] ...) "<format-string>"
  16 #
  17 # Example: qemu_malloc(size_t size) "size %zu"
  18 #
  19 # The "disable" keyword will build without the trace event.
  20 # In case of 'simple' trace backend, it will allow the trace event to be
  21 # compiled, but this would be turned off by default. It can be toggled on via
  22 # the monitor.
  23 #
  24 # The <name> must be a valid as a C function name.
  25 #
  26 # Types should be standard C types.  Use void * for pointers because the trace
  27 # system may not have the necessary headers included.
  28 #
  29 # The <format-string> should be a sprintf()-compatible format string.
  30
  31 # qemu-malloc.c
  32 disable qemu_malloc(size_t size, void *ptr) "size %zu ptr %p"
  33 disable qemu_realloc(void *ptr, size_t size, void *newptr) "ptr %p size %zu newptr %p"
  34 disable qemu_free(void *ptr) "ptr %p"
  35
  36 # osdep.c
  37 disable qemu_memalign(size_t alignment, size_t size, void *ptr) "alignment %zu size %zu ptr %p"
  38 disable qemu_vmalloc(size_t size, void *ptr) "size %zu ptr %p"
  39 disable qemu_vfree(void *ptr) "ptr %p"
  40
  41 # hw/virtio.c
  42 disable virtqueue_fill(void *vq, const void *elem, unsigned int len, unsigned int idx) "vq %p elem %p len %u idx %u"
  43 disable virtqueue_flush(void *vq, unsigned int count) "vq %p count %u"
  44 disable virtqueue_pop(void *vq, void *elem, unsigned int in_num, unsigned int out_num) "vq %p elem %p in_num %u out_num %u"
  45 disable virtio_queue_notify(void *vdev, int n, void *vq) "vdev %p n %d vq %p"
  46 disable virtio_irq(void *vq) "vq %p"
  47 disable virtio_notify(void *vdev, void *vq) "vdev %p vq %p"
  48
  49 # block.c
  50 disable multiwrite_cb(void *mcb, int ret) "mcb %p ret %d"
  51 disable bdrv_aio_multiwrite(void *mcb, int num_callbacks, int num_reqs) "mcb %p num_callbacks %d num_reqs %d"
  52 disable bdrv_aio_multiwrite_earlyfail(void *mcb) "mcb %p"
  53 disable bdrv_aio_multiwrite_latefail(void *mcb, int i) "mcb %p i %d"
  54
  55 # hw/virtio-blk.c
  56 disable virtio_blk_req_complete(void *req, int status) "req %p status %d"
  57 disable virtio_blk_rw_complete(void *req, int ret) "req %p ret %d"
  58 disable virtio_blk_handle_write(void *req, uint64_t sector, size_t nsectors) "req %p sector %"PRIu64" nsectors %zu"
  59
  60 # posix-aio-compat.c
  61 disable paio_submit(void *acb, void *opaque, int64_t sector_num, int nb_sectors, int type) "acb %p opaque %p sector_num %"PRId64" nb_sectors %d type %d"
  62
  63 # ioport.c
  64 disable cpu_in(unsigned int addr, unsigned int val) "addr %#x value %u"
  65 disable cpu_out(unsigned int addr, unsigned int val) "addr %#x value %u"
  66
  67 # balloon.c
  68 # Since requests are raised via monitor, not many tracepoints are needed.
  69 disable balloon_event(void *opaque, unsigned long addr) "opaque %p addr %lu"