xnu-6153.81.5.tar.gz

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

diff --git a/bsd/sys/fasttrap_impl.h b/bsd/sys/fasttrap_impl.h
index 0570f0c5eb5772b478d6b15979b207d7ef19f67f..109118fb192c09e87fc4a1265480da90f591355f 100644 (file)
--- a/bsd/sys/fasttrap_impl.h
+++ b/bsd/sys/fasttrap_impl.h
@@ -20,17 +20,13 @@
  */
 
 /*
  */
 
 /*

- * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
+ * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.

  * Use is subject to license terms.
  */
 
 #ifndef        _FASTTRAP_IMPL_H
 #define        _FASTTRAP_IMPL_H
 
  * Use is subject to license terms.
  */
 
 #ifndef        _FASTTRAP_IMPL_H
 #define        _FASTTRAP_IMPL_H
 

-/*
- * #pragma ident       "@(#)fasttrap_impl.h    1.12    06/06/12 SMI"
- */
-

 #include <sys/types.h>
 #include <sys/dtrace.h>
 #include <sys/proc.h>
 #include <sys/types.h>
 #include <sys/dtrace.h>
 #include <sys/proc.h>


@@ -38,7 +34,8 @@
 #include <sys/fasttrap.h>
 #include <sys/fasttrap_isa.h>
 
 #include <sys/fasttrap.h>
 #include <sys/fasttrap_isa.h>
 

-#define proc_t struct proc
+/* Solaris proc_t is the struct. Darwin's proc_t is a pointer to it. */
+#define proc_t struct proc /* Steer clear of the Darwin typedef for proc_t */

 
 #ifdef __cplusplus
 extern "C" {
 
 #ifdef __cplusplus
 extern "C" {


@@ -52,7 +49,9 @@ extern "C" {
  * providers. Those providers are each represented by a fasttrap_provider_t.
  * All providers for a given process have a pointer to a shared
  * fasttrap_proc_t. The fasttrap_proc_t has two states: active or defunct.
  * providers. Those providers are each represented by a fasttrap_provider_t.
  * All providers for a given process have a pointer to a shared
  * fasttrap_proc_t. The fasttrap_proc_t has two states: active or defunct.

- * It becomes defunct when the process performs an exit or an exec.
+ * When the count of active providers goes to zero it becomes defunct; a
+ * provider drops its active count when it is removed individually or as part
+ * of a mass removal when a process exits or performs an exec.

  *
  * Each probe is represented by a fasttrap_probe_t which has a pointer to
  * its associated provider as well as a list of fasttrap_id_tp_t structures
  *
  * Each probe is represented by a fasttrap_probe_t which has a pointer to
  * its associated provider as well as a list of fasttrap_id_tp_t structures


@@ -61,8 +60,8 @@ extern "C" {
  * and it contains two lists of fasttrap_id_t structures (to be fired pre-
  * and post-instruction emulation) that identify the probes attached to the
  * tracepoint. Tracepoints also have a pointer to the fasttrap_proc_t for the
  * and it contains two lists of fasttrap_id_t structures (to be fired pre-
  * and post-instruction emulation) that identify the probes attached to the
  * tracepoint. Tracepoints also have a pointer to the fasttrap_proc_t for the

- * process they trace which is used when looking up a tracepoint both at
- * probe fire time and when enabling and disabling probes.
+ * process they trace which is used when looking up a tracepoint both when a
+ * probe fires and when enabling and disabling probes.

  *
  * It's important to note that probes are preallocated with the necessary
  * number of tracepoints, but that tracepoints can be shared by probes and
  *
  * It's important to note that probes are preallocated with the necessary
  * number of tracepoints, but that tracepoints can be shared by probes and


@@ -79,9 +78,9 @@ extern "C" {
 
 typedef struct fasttrap_proc {
        pid_t ftpc_pid;                         /* process ID for this proc */
 
 typedef struct fasttrap_proc {
        pid_t ftpc_pid;                         /* process ID for this proc */

-       uint_t ftpc_defunct;                    /* denotes a lame duck proc */
-       uint64_t ftpc_count;                    /* reference count */
-       lck_mtx_t ftpc_mtx;                     /* proc lock */
+       uint64_t ftpc_acount;                   /* count of active providers */
+       uint64_t ftpc_rcount;                   /* count of extant providers */
+       lck_mtx_t ftpc_mtx;                     /* lock on all but acount */

        struct fasttrap_proc *ftpc_next;        /* next proc in hash chain */
 } fasttrap_proc_t;
 
        struct fasttrap_proc *ftpc_next;        /* next proc in hash chain */
 } fasttrap_proc_t;
 


@@ -94,6 +93,7 @@ typedef struct fasttrap_provider {
        uint_t ftp_retired;                     /* mark when retired */
        lck_mtx_t ftp_mtx;                      /* provider lock */
        lck_mtx_t ftp_cmtx;                     /* lock on creating probes */
        uint_t ftp_retired;                     /* mark when retired */
        lck_mtx_t ftp_mtx;                      /* provider lock */
        lck_mtx_t ftp_cmtx;                     /* lock on creating probes */

+       uint64_t ftp_pcount;                    /* probes in provider count */

        uint64_t ftp_rcount;                    /* enabled probes ref count */
        uint64_t ftp_ccount;                    /* consumers creating probes */
        uint64_t ftp_mcount;                    /* meta provider count */
        uint64_t ftp_rcount;                    /* enabled probes ref count */
        uint64_t ftp_ccount;                    /* consumers creating probes */
        uint64_t ftp_mcount;                    /* meta provider count */


@@ -127,6 +127,7 @@ struct fasttrap_probe {
        uint8_t *ftp_argmap;                    /* native to translated args */
        uint8_t ftp_nargs;                      /* translated argument count */
        uint8_t ftp_enabled;                    /* is this probe enabled */
        uint8_t *ftp_argmap;                    /* native to translated args */
        uint8_t ftp_nargs;                      /* translated argument count */
        uint8_t ftp_enabled;                    /* is this probe enabled */

+       uint8_t ftp_triggered;

        char *ftp_xtypes;                       /* translated types index */
        char *ftp_ntypes;                       /* native types index */
        fasttrap_id_tp_t ftp_tps[1];            /* flexible array */
        char *ftp_xtypes;                       /* translated types index */
        char *ftp_ntypes;                       /* native types index */
        fasttrap_id_tp_t ftp_tps[1];            /* flexible array */


@@ -168,19 +169,14 @@ typedef struct fasttrap_hash {
 #define        fasttrap_fuword32       fuword32
 #define        fasttrap_suword32       suword32
 
 #define        fasttrap_fuword32       fuword32
 #define        fasttrap_suword32       suword32
 

-#if defined __APPLE__

 /*
 /*

- * xnu runs in 32 bit mode even when supporting 64 bit processes. We need
- * to make size explicit.
+ * APPLE NOTE: xnu supports both 32bit and 64bit user processes.
+ * We need to make size explicit.

  */
 #define        fasttrap_fuword64       fuword64
 #define        fasttrap_suword64       suword64
 #define fasttrap_fuword64_noerr        fuword64_noerr
 #define fasttrap_fuword32_noerr        fuword32_noerr
  */
 #define        fasttrap_fuword64       fuword64
 #define        fasttrap_suword64       suword64
 #define fasttrap_fuword64_noerr        fuword64_noerr
 #define fasttrap_fuword32_noerr        fuword32_noerr

-#else
-#define        fasttrap_fulword        fulword
-#define        fasttrap_sulword        sulword
-#endif

 
 extern void fasttrap_sigtrap(proc_t *, uthread_t, user_addr_t);
 
 
 extern void fasttrap_sigtrap(proc_t *, uthread_t, user_addr_t);
 


@@ -190,6 +186,8 @@ extern fasttrap_hash_t              fasttrap_tpoints;
 #define        FASTTRAP_TPOINTS_INDEX(pid, pc) \
        (((pc) / sizeof (fasttrap_instr_t) + (pid)) & fasttrap_tpoints.fth_mask)
 
 #define        FASTTRAP_TPOINTS_INDEX(pid, pc) \
        (((pc) / sizeof (fasttrap_instr_t) + (pid)) & fasttrap_tpoints.fth_mask)
 

+extern void fasttrap_tracepoint_retire(proc_t *p, fasttrap_tracepoint_t *tp);
+

 /*
  * Must be implemented by fasttrap_isa.c
  */
 /*
  * Must be implemented by fasttrap_isa.c
  */


@@ -198,12 +196,12 @@ extern int fasttrap_tracepoint_init(proc_t *, fasttrap_tracepoint_t *,
 extern int fasttrap_tracepoint_install(proc_t *, fasttrap_tracepoint_t *);
 extern int fasttrap_tracepoint_remove(proc_t *, fasttrap_tracepoint_t *);
 
 extern int fasttrap_tracepoint_install(proc_t *, fasttrap_tracepoint_t *);
 extern int fasttrap_tracepoint_remove(proc_t *, fasttrap_tracepoint_t *);
 

-#if defined (__ppc__) || defined (__ppc64__)
-extern int fasttrap_pid_probe(ppc_saved_state_t *regs);
-extern int fasttrap_return_probe(ppc_saved_state_t* regs);
-#elif defined (__i386__) || defined(__x86_64__)
+#if defined(__x86_64__)

 extern int fasttrap_pid_probe(x86_saved_state_t *regs);
 extern int fasttrap_return_probe(x86_saved_state_t* regs);
 extern int fasttrap_pid_probe(x86_saved_state_t *regs);
 extern int fasttrap_return_probe(x86_saved_state_t* regs);

+#elif defined(__arm__) || defined(__arm64__)
+extern int fasttrap_pid_probe(arm_saved_state_t *rp);
+extern int fasttrap_return_probe(arm_saved_state_t *regs);

 #else
 #error architecture not supported
 #endif
 #else
 #error architecture not supported
 #endif


@@ -211,6 +209,7 @@ extern int fasttrap_return_probe(x86_saved_state_t* regs);
 extern uint64_t fasttrap_pid_getarg(void *, dtrace_id_t, void *, int, int);
 extern uint64_t fasttrap_usdt_getarg(void *, dtrace_id_t, void *, int, int);
 
 extern uint64_t fasttrap_pid_getarg(void *, dtrace_id_t, void *, int, int);
 extern uint64_t fasttrap_usdt_getarg(void *, dtrace_id_t, void *, int, int);
 

+

 #ifdef __cplusplus
 }
 #endif
 #ifdef __cplusplus
 }
 #endif