xnu-4570.51.1.tar.gz

[apple/xnu.git] / bsd / sys / dtrace_impl.h

diff --git a/bsd/sys/dtrace_impl.h b/bsd/sys/dtrace_impl.h
index cbb14c0abd651fcade830c0dbb5fff44da1acf20..125293dbfb084b652ea16865d9b583fcde782222 100644 (file)
--- a/bsd/sys/dtrace_impl.h
+++ b/bsd/sys/dtrace_impl.h
@@ -24,6 +24,7 @@
  * Use is subject to license terms.
  *
  * Portions Copyright (c) 2012 by Delphix. All rights reserved.
  * Use is subject to license terms.
  *
  * Portions Copyright (c) 2012 by Delphix. All rights reserved.

+ * Portions Copyright (c) 2016 by Joyent, Inc.

  */
 
 #ifndef _SYS_DTRACE_IMPL_H
  */
 
 #ifndef _SYS_DTRACE_IMPL_H


@@ -421,6 +422,8 @@ typedef struct dtrace_aggregation {
 
 typedef struct dtrace_buffer {
        uint64_t dtb_offset;                    /* current offset in buffer */
 
 typedef struct dtrace_buffer {
        uint64_t dtb_offset;                    /* current offset in buffer */

+       uint64_t dtb_cur_limit;                 /* current limit before signaling/dropping */
+       uint64_t dtb_limit;                     /* limit before signaling */

        uint64_t dtb_size;                      /* size of buffer */
        uint32_t dtb_flags;                     /* flags */
        uint32_t dtb_drops;                     /* number of drops */
        uint64_t dtb_size;                      /* size of buffer */
        uint32_t dtb_flags;                     /* flags */
        uint32_t dtb_drops;                     /* number of drops */


@@ -436,6 +439,7 @@ typedef struct dtrace_buffer {
 #endif
        uint64_t dtb_switched;                  /* time of last switch */
        uint64_t dtb_interval;                  /* observed switch interval */
 #endif
        uint64_t dtb_switched;                  /* time of last switch */
        uint64_t dtb_interval;                  /* observed switch interval */

+       uint64_t dtb_pad2[4];                   /* pad to avoid false sharing */

 } dtrace_buffer_t;
 
 /*
 } dtrace_buffer_t;
 
 /*


@@ -927,6 +931,7 @@ typedef struct dtrace_mstate {
        int dtms_ipl;                           /* cached interrupt pri lev */
        int dtms_fltoffs;                       /* faulting DIFO offset */
        uintptr_t dtms_strtok;                  /* saved strtok() pointer */
        int dtms_ipl;                           /* cached interrupt pri lev */
        int dtms_fltoffs;                       /* faulting DIFO offset */
        uintptr_t dtms_strtok;                  /* saved strtok() pointer */

+       uintptr_t dtms_strtok_limit;            /* upper bound of strtok ptr */

        uint32_t dtms_access;                   /* memory access rights */
        dtrace_difo_t *dtms_difo;               /* current dif object */
 } dtrace_mstate_t;
        uint32_t dtms_access;                   /* memory access rights */
        dtrace_difo_t *dtms_difo;               /* current dif object */
 } dtrace_mstate_t;


@@ -954,6 +959,7 @@ typedef struct dtrace_mstate {
  * directed acyclic graph.  The activity transition diagram is as follows:
  *
  *
  * directed acyclic graph.  The activity transition diagram is as follows:
  *
  *

+ *

  * +----------+                   +--------+                   +--------+
  * | INACTIVE |------------------>| WARMUP |------------------>| ACTIVE |
  * +----------+   dtrace_go(),    +--------+   dtrace_go(),    +--------+
  * +----------+                   +--------+                   +--------+
  * | INACTIVE |------------------>| WARMUP |------------------>| ACTIVE |
  * +----------+   dtrace_go(),    +--------+   dtrace_go(),    +--------+


@@ -1125,6 +1131,7 @@ typedef struct dtrace_helpers {
 #define        DTRACE_HELPTRACE_DONE   (-2)
 #define        DTRACE_HELPTRACE_ERR    (-3)
 
 #define        DTRACE_HELPTRACE_DONE   (-2)
 #define        DTRACE_HELPTRACE_ERR    (-3)
 

+

 typedef struct dtrace_helptrace {
        dtrace_helper_action_t  *dtht_helper;   /* helper action */
        int dtht_where;                         /* where in helper action */
 typedef struct dtrace_helptrace {
        dtrace_helper_action_t  *dtht_helper;   /* helper action */
        int dtht_where;                         /* where in helper action */


@@ -1219,6 +1226,7 @@ struct dtrace_state {
        dtrace_cred_t dts_cred;                 /* credentials */
        size_t dts_nretained;                   /* number of retained enabs */
        uint64_t dts_arg_error_illval;
        dtrace_cred_t dts_cred;                 /* credentials */
        size_t dts_nretained;                   /* number of retained enabs */
        uint64_t dts_arg_error_illval;

+       uint32_t dts_buf_over_limit;            /* number of bufs over dtb_limit */

 };
 
 struct dtrace_provider {
 };
 
 struct dtrace_provider {


@@ -1302,6 +1310,18 @@ typedef struct dtrace_errhash {
 
 #endif /* DTRACE_ERRDEBUG */
 
 
 #endif /* DTRACE_ERRDEBUG */
 

+/**
+ * DTrace Matching pre-conditions
+ *
+ * Used when matching new probes to discard matching of enablings that
+ * doesn't match the condition tested by dmc_func
+ */
+typedef struct dtrace_match_cond {
+       int (*dmc_func)(dtrace_probedesc_t*, void*);
+       void *dmc_data;
+} dtrace_match_cond_t;
+
+

 /*
  * DTrace Toxic Ranges
  *
 /*
  * DTrace Toxic Ranges
  *


@@ -1323,7 +1343,7 @@ typedef struct dtrace_toxrange {
        uintptr_t       dtt_limit;              /* limit of toxic range */
 } dtrace_toxrange_t;
 
        uintptr_t       dtt_limit;              /* limit of toxic range */
 } dtrace_toxrange_t;
 

-extern uint64_t dtrace_getarg(int, int);
+extern uint64_t dtrace_getarg(int, int, dtrace_mstate_t*, dtrace_vstate_t*);

 extern int dtrace_getipl(void);
 extern uintptr_t dtrace_caller(int);
 extern uint32_t dtrace_cas32(uint32_t *, uint32_t, uint32_t);
 extern int dtrace_getipl(void);
 extern uintptr_t dtrace_caller(int);
 extern uint32_t dtrace_cas32(uint32_t *, uint32_t, uint32_t);


@@ -1333,6 +1353,9 @@ extern void dtrace_copyinstr(user_addr_t, uintptr_t, size_t, volatile uint16_t *
 extern void dtrace_copyout(uintptr_t, user_addr_t, size_t, volatile uint16_t *);
 extern void dtrace_copyoutstr(uintptr_t, user_addr_t, size_t, volatile uint16_t *);
 extern void dtrace_getpcstack(pc_t *, int, int, uint32_t *);
 extern void dtrace_copyout(uintptr_t, user_addr_t, size_t, volatile uint16_t *);
 extern void dtrace_copyoutstr(uintptr_t, user_addr_t, size_t, volatile uint16_t *);
 extern void dtrace_getpcstack(pc_t *, int, int, uint32_t *);

+extern uint64_t dtrace_load64(uintptr_t);
+extern int dtrace_canload(uint64_t, size_t, dtrace_mstate_t*, dtrace_vstate_t*);
+

 extern uint64_t dtrace_getreg(struct regs *, uint_t);
 extern int dtrace_getstackdepth(int);
 extern void dtrace_getupcstack(uint64_t *, int);
 extern uint64_t dtrace_getreg(struct regs *, uint_t);
 extern int dtrace_getstackdepth(int);
 extern void dtrace_getupcstack(uint64_t *, int);


@@ -1354,25 +1377,42 @@ extern void dtrace_isa_init(void);
 extern void dtrace_copy(uintptr_t, uintptr_t, size_t);
 extern void dtrace_copystr(uintptr_t, uintptr_t, size_t, volatile uint16_t *);
 
 extern void dtrace_copy(uintptr_t, uintptr_t, size_t);
 extern void dtrace_copystr(uintptr_t, uintptr_t, size_t, volatile uint16_t *);
 

+/*
+ * DTrace state handling
+ */
+extern minor_t dtrace_state_reserve(void);
+extern dtrace_state_t* dtrace_state_allocate(minor_t minor);
+extern dtrace_state_t* dtrace_state_get(minor_t minor);
+extern void dtrace_state_free(minor_t minor);
+

 /*
  * DTrace restriction checks
  */
 /*
  * DTrace restriction checks
  */

+extern void dtrace_restriction_policy_load(void);

 extern boolean_t dtrace_is_restricted(void);
 extern boolean_t dtrace_is_restricted(void);

+extern boolean_t dtrace_are_restrictions_relaxed(void);
+extern boolean_t dtrace_fbt_probes_restricted(void);
+extern boolean_t dtrace_sdt_probes_restricted(void);

 extern boolean_t dtrace_can_attach_to_proc(proc_t);
 
 /*
  * DTrace Assertions
  *
 extern boolean_t dtrace_can_attach_to_proc(proc_t);
 
 /*
  * DTrace Assertions
  *

- * DTrace calls ASSERT from probe context.  To assure that a failed ASSERT
- * does not induce a markedly more catastrophic failure (e.g., one from which
- * a dump cannot be gleaned), DTrace must define its own ASSERT to be one that
- * may safely be called from probe context.  This header file must thus be
- * included by any DTrace component that calls ASSERT from probe context, and
- * _only_ by those components.  (The only exception to this is kernel
- * debugging infrastructure at user-level that doesn't depend on calling
- * ASSERT.)
+ * DTrace calls ASSERT and VERIFY from probe context.  To assure that a failed
+ * ASSERT or VERIFYdoes not induce a markedly more catastrophic failure (e.g.,
+ * one from which a dump cannot be gleaned), DTrace must define its own ASSERT
+ * and VERIFY macros to be ones that may safely be called from probe context.
+ * This header file must thus be included by any DTrace component that calls
+ * ASSERT and/or VERIFY from probe context, and _only_ by those components.
+ * (The only exception to this is kernel debugging infrastructure at user-level
+ * that doesn't depend on calling ASSERT.)

  */
 #undef ASSERT
  */
 #undef ASSERT

+#undef VERIFY
+
+#define        VERIFY(EX)      ((void)((EX) || \
+                       dtrace_assfail(#EX, __FILE__, __LINE__)))
+

 #if DEBUG
 #define        ASSERT(EX)      ((void)((EX) || \
                        dtrace_assfail(#EX, __FILE__, __LINE__)))
 #if DEBUG
 #define        ASSERT(EX)      ((void)((EX) || \
                        dtrace_assfail(#EX, __FILE__, __LINE__)))