libkern/os/trace_internal.h

   1 /*
   2  * Copyright (c) 2013-2015 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 #ifndef libtrace_trace_internal_h
  25 #define libtrace_trace_internal_h
  26
  27 #include <os/log.h>
  28 #include <uuid/uuid.h>
  29 #include <firehose/firehose_types_private.h>
  30
  31 __BEGIN_DECLS
  32
  33 typedef union {
  34     struct {
  35 #if __LP64__
  36         uintptr_t pc : 48;
  37 #else
  38         uintptr_t pc;
  39 #endif
  40         // not encoded
  41         firehose_tracepoint_flags_t flags;
  42         uintptr_t dso;
  43         uuid_t uuid;
  44     };
  45
  46     uint32_t offset;
  47     uint64_t vlocation : 48; // we never use the full 64-bits
  48
  49 #if defined(__LP64__)
  50     uint8_t encode_value[6]; // 48-bits
  51 #else
  52     uint8_t encode_value[sizeof(uintptr_t)];
  53 #endif
  54 } os_trace_location_u;
  55
  56 typedef os_trace_location_u *os_trace_location_t;
  57
  58 OS_ALWAYS_INLINE
  59 inline uint32_t
  60 _os_trace_offset(const void *dso, const void *addr, _firehose_tracepoint_flags_activity_t flags __unused)
  61 {
  62     return (uint32_t) ((uintptr_t)addr - (uintptr_t)dso);
  63 }
  64
  65 bool
  66 _os_trace_addr_in_text_segment(const void *dso, const void *addr);
  67
  68 __END_DECLS
  69
  70 #endif