text: /*
   * CDDL HEADER START
   *
   * The contents of this file are subject to the terms of the
   * Common Development and Distribution License (the "License").
   * You may not use this file except in compliance with the License.
   *
   * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   * or http://www.opensolaris.org/os/licensing.
   * See the License for the specific language governing permissions
   * and limitations under the License.
   *
   * When distributing Covered Code, include this CDDL HEADER in each
   * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
   * If applicable, add the following below this CDDL HEADER, with the
   * fields enclosed by brackets "[]" replaced with your own identifying
   * information: Portions Copyright [yyyy] [name of copyright owner]
   *
   * CDDL HEADER END
   */
  
  /*
   * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
  #ifndef	_DT_PROC_H
  #define	_DT_PROC_H
  
  #pragma ident	"%Z%%M%	%I%	%E% SMI"
  
  #include <libproc.h>
  #include <dtrace.h>
  #include <pthread.h>
  #include <dt_list.h>
  
  #ifdef	__cplusplus
  extern "C" {
  #endif
  
  typedef struct dt_proc {
  	dt_list_t dpr_list;		/* prev/next pointers for lru chain */
  	struct dt_proc *dpr_hash;	/* next pointer for pid hash chain */
  	dtrace_hdl_t *dpr_hdl;		/* back pointer to libdtrace handle */
  	struct ps_prochandle *dpr_proc;	/* proc handle for libproc calls */
  	char dpr_errmsg[BUFSIZ];	/* error message */
  	rd_agent_t *dpr_rtld;		/* rtld handle for librtld_db calls */
  	pthread_mutex_t dpr_lock;	/* lock for manipulating dpr_hdl */
  	pthread_cond_t dpr_cv;		/* cond for dpr_stop/quit/done */
  	pid_t dpr_pid;			/* pid of process */
  	uint_t dpr_refs;		/* reference count */
  	uint8_t dpr_cacheable;		/* cache handle using lru list */
  	uint8_t dpr_stop;		/* stop mask: see flag bits below */
  	uint8_t dpr_quit;		/* quit flag: ctl thread should quit */
  	uint8_t dpr_done;		/* done flag: ctl thread has exited */
  	uint8_t dpr_usdt;		/* usdt flag: usdt initialized */
  	uint8_t dpr_stale;		/* proc flag: been deprecated */
  	uint8_t dpr_rdonly;		/* proc flag: opened read-only */
  	pthread_t dpr_tid;		/* control thread (or zero if none) */
  	dt_list_t dpr_bps;		/* list of dt_bkpt_t structures */
  } dt_proc_t;
  
  typedef struct dt_proc_notify {
  	dt_proc_t *dprn_dpr;		/* process associated with the event */
  	char dprn_errmsg[BUFSIZ];	/* error message */
  	struct dt_proc_notify *dprn_next; /* next pointer */
  } dt_proc_notify_t;
  
  #define	DT_PROC_STOP_IDLE	0x01	/* idle on owner's stop request */
  #define	DT_PROC_STOP_CREATE	0x02	/* wait on dpr_cv at process exec */
  #define	DT_PROC_STOP_GRAB	0x04	/* wait on dpr_cv at process grab */
  #define	DT_PROC_STOP_PREINIT	0x08	/* wait on dpr_cv at rtld preinit */
  #define	DT_PROC_STOP_POSTINIT	0x10	/* wait on dpr_cv at rtld postinit */
  #define	DT_PROC_STOP_MAIN	0x20	/* wait on dpr_cv at a.out`main() */
  
  typedef void dt_bkpt_f(dtrace_hdl_t *, dt_proc_t *, void *);
  
  typedef struct dt_bkpt {
  	dt_list_t dbp_list;		/* prev/next pointers for bkpt list */
  	dt_bkpt_f *dbp_func;		/* callback function to execute */
  	void *dbp_data;			/* callback function private data */
  	uintptr_t dbp_addr;		/* virtual address of breakpoint */
  	ulong_t dbp_instr;		/* saved instruction from breakpoint */
  	ulong_t dbp_hits;		/* count of breakpoint hits for debug */
  	int dbp_active;			/* flag indicating breakpoint is on */
  } dt_bkpt_t;
  
  typedef struct dt_proc_hash {
  	pthread_mutex_t dph_lock;	/* lock protecting dph_notify list */
  	pthread_cond_t dph_cv;		/* cond for waiting for dph_notify */
  	dt_proc_notify_t *dph_notify;	/* list of pending proc notifications */
  	dt_list_t dph_lrulist;		/* list of dt_proc_t's in lru order */
  	uint_t dph_lrulim;		/* limit on number of procs to hold */
  	uint_t dph_lrucnt;		/* count of cached process handles */
  	uint_t dph_hashlen;		/* size of hash chains array */
  	dt_proc_t *dph_hash[1];		/* hash chains array */
  } dt_proc_hash_t;
  
  extern struct ps_prochandle *dt_proc_create(dtrace_hdl_t *,
      const char *, char *const *, proc_child_func *, void *);
  
  extern struct ps_prochandle *dt_proc_grab(dtrace_hdl_t *, pid_t, int, int);
  extern void dt_proc_release(dtrace_hdl_t *, struct ps_prochandle *);
  extern void dt_proc_continue(dtrace_hdl_t *, struct ps_prochandle *);
  extern void dt_proc_lock(dtrace_hdl_t *, struct ps_prochandle *);
  extern void dt_proc_unlock(dtrace_hdl_t *, struct ps_prochandle *);
  extern dt_proc_t *dt_proc_lookup(dtrace_hdl_t *, struct ps_prochandle *, int);
  
  extern void dt_proc_hash_create(dtrace_hdl_t *);
  extern void dt_proc_hash_destroy(dtrace_hdl_t *);
  
  #ifdef	__cplusplus
  }
  #endif
  
  #endif	/* _DT_PROC_H */
  