bsd/sys/sdt_impl.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #ifndef _SDT_IMPL_H
  28 #define _SDT_IMPL_H
  29
  30 #ifdef  __cplusplus
  31 extern "C" {
  32 #endif
  33
  34 extern const char *sdt_prefix;
  35
  36 typedef struct sdt_probedesc {
  37         char                    *sdpd_name;     /* name of this probe */
  38         int                     sdpd_namelen;
  39         char                    *sdpd_func;     /* APPLE NOTE: function name */
  40         const char              *sdpd_prov;     /* APPLE NOTE: provider name */
  41         unsigned long           sdpd_offset;    /* offset of call in text */
  42         struct sdt_probedesc    *sdpd_next;     /* next static probe */
  43 } sdt_probedesc_t;
  44
  45 #ifdef  __cplusplus
  46 }
  47 #endif
  48
  49 #ifdef  __cplusplus
  50 extern "C" {
  51 #endif
  52
  53 #include <sys/dtrace.h>
  54
  55 struct module {
  56         int sdt_nprobes;
  57         sdt_probedesc_t *sdt_probes;
  58 };
  59
  60 extern int sdt_invop(uintptr_t, uintptr_t *, uintptr_t);
  61 extern uint64_t sdt_getarg(void *, dtrace_id_t, void *, int, int);
  62
  63 void sdt_provide_module(void *, struct modctl *);
  64 void sdt_early_init(void);
  65 void sdt_init(void);
  66
  67 extern int          sdt_probetab_size;
  68 extern int          sdt_probetab_mask;
  69 #define SDT_ADDR2NDX(addr)  ((((uintptr_t)(addr)) >> 4) & sdt_probetab_mask)
  70
  71
  72 #if defined(__x86_64__)
  73 typedef uint8_t sdt_instr_t;
  74 #elif defined(__arm__)
  75 typedef uint16_t sdt_instr_t;
  76 #elif defined(__arm64__)
  77 typedef uint32_t sdt_instr_t;
  78 #else
  79 #error Unknown implementation
  80 #endif
  81
  82 typedef struct sdt_provider {
  83         const char                      *sdtp_name;     /* name of provider */
  84         const char                      *sdtp_prefix;   /* prefix for probe names */
  85         dtrace_pattr_t          *sdtp_attr;     /* stability attributes */
  86         dtrace_provider_id_t    sdtp_id;        /* provider ID */
  87 } sdt_provider_t;
  88
  89 extern sdt_provider_t sdt_providers[];          /* array of providers */
  90
  91 typedef struct sdt_probe {
  92         sdt_provider_t  *sdp_provider;          /* provider */
  93         char            *sdp_name;              /* name of probe */
  94         int             sdp_namelen;            /* length of allocated name */
  95         dtrace_id_t     sdp_id;                 /* probe ID */
  96         struct modctl   *sdp_ctl;               /* modctl for module */
  97         int             sdp_loadcnt;            /* load count for module */
  98         int             sdp_primary;            /* non-zero if primary mod */
  99         sdt_instr_t     *sdp_patchpoint;        /* patch point */
 100         sdt_instr_t     sdp_patchval;           /* instruction to patch */
 101         sdt_instr_t     sdp_savedval;           /* saved instruction value */
 102         struct sdt_probe *sdp_next;             /* next probe */
 103         struct sdt_probe *sdp_hashnext;         /* next on hash */
 104 } sdt_probe_t;
 105
 106 typedef struct sdt_argdesc {
 107         const char *sda_provider;               /* provider for arg */
 108         const char *sda_name;                   /* name of probe */
 109         const int sda_ndx;                      /* argument index */
 110         const int sda_mapping;                  /* mapping of argument */
 111         const char *sda_native;                 /* native type of argument */
 112         const char *sda_xlate;                  /* translated type of arg */
 113 } sdt_argdesc_t;
 114
 115 extern void sdt_getargdesc(void *, dtrace_id_t, void *, dtrace_argdesc_t *);
 116
 117 #ifdef  __cplusplus
 118 }
 119 #endif
 120
 121 #endif  /* _SDT_IMPL_H */