xnu-6153.81.5.tar.gz

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

diff --git a/bsd/sys/dtrace_ptss.h b/bsd/sys/dtrace_ptss.h
index 26381cfa9d12768ee27aeb2bcb80890d85451800..0b6c580f1ca5d4427cc68dfb5ca71d1607103df1 100644 (file)
--- a/bsd/sys/dtrace_ptss.h
+++ b/bsd/sys/dtrace_ptss.h
@@ -2,7 +2,7 @@
  * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- * 
+ *
  * This file contains Original Code and/or Modifications of Original Code
  * as defined in and that are subject to the Apple Public Source License
  * Version 2.0 (the 'License'). You may not use this file except in
@@ -11,10 +11,10 @@
  * unlawful or unlicensed copies of an Apple operating system, or to
  * circumvent, violate, or enable the circumvention or violation of, any
  * terms of an Apple operating system software license agreement.
- * 
+ *
  * Please obtain a copy of the License at
  * http://www.opensource.apple.com/apsl/ and read it before using this file.
- * 
+ *
  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
@@ -22,14 +22,14 @@
  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  * Please see the License for the specific language governing rights and
  * limitations under the License.
- * 
+ *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 
 #ifndef _DTRACE_PTSS_H_
-#define        _DTRACE_PTSS_H_
+#define _DTRACE_PTSS_H_
 
-#ifdef __cplusplus
+#ifdef  __cplusplus
 extern "C" {
 #endif
 
@@ -42,12 +42,12 @@ extern "C" {
  *
  * To avoid serialization, this is a (mostly) lockless allocator. If
  * a new page has to be allocated, the process's sprlock will be acquired.
- * 
+ *
  * NOTE: The dtrace copyin/copyout code is still the shared code that
  * can handle unmapped pages, so the scratch space isn't wired for now.
  * * Each page in user space is wired. It cannot be paged out, because
  * * dtrace's copyin/copyout is only guaranteed to handle pages already
- * * in memory. 
+ * * in memory.
  *
  * Each page in user space is represented by a dt_ptss_page. Page entries
  * are chained. Once allocated, a page is not freed until dtrace "cleans up"
@@ -72,35 +72,34 @@ extern "C" {
  */
 
 
-
 #define DTRACE_PTSS_SCRATCH_SPACE_PER_THREAD (64)
 
-#define DTRACE_PTSS_ENTRIES_PER_PAGE (PAGE_SIZE / DTRACE_PTSS_SCRATCH_SPACE_PER_THREAD)
+#define DTRACE_PTSS_ENTRIES_PER_PAGE (PAGE_MAX_SIZE / DTRACE_PTSS_SCRATCH_SPACE_PER_THREAD)
 
 struct dtrace_ptss_page_entry {
-       struct dtrace_ptss_page_entry*  next;
-       user_addr_t                     addr;
+       struct dtrace_ptss_page_entry*  next;
+       user_addr_t                     addr;
+       user_addr_t                     write_addr;
 };
 
 struct dtrace_ptss_page {
        struct dtrace_ptss_page*       next;
-       struct dtrace_ptss_page_entry  entries[PAGE_MAX_SIZE / DTRACE_PTSS_SCRATCH_SPACE_PER_THREAD]; 
+       struct dtrace_ptss_page_entry  entries[DTRACE_PTSS_ENTRIES_PER_PAGE];
 };
 
-struct dtrace_ptss_page_entry* dtrace_ptss_claim_entry(struct proc* p); /* sprlock not held */
-struct dtrace_ptss_page_entry* dtrace_ptss_claim_entry_locked(struct proc* p); /* sprlock held */
-void                           dtrace_ptss_release_entry(struct proc* p, struct dtrace_ptss_page_entry* e);
+struct dtrace_ptss_page_entry*  dtrace_ptss_claim_entry(struct proc* p); /* sprlock not held */
+struct dtrace_ptss_page_entry*  dtrace_ptss_claim_entry_locked(struct proc* p); /* sprlock held */
+void                            dtrace_ptss_release_entry(struct proc* p, struct dtrace_ptss_page_entry* e);
 
-struct dtrace_ptss_page*       dtrace_ptss_allocate_page(struct proc* p);
-void                           dtrace_ptss_free_page(struct proc* p, struct dtrace_ptss_page* ptss_page);
+struct dtrace_ptss_page*        dtrace_ptss_allocate_page(struct proc* p);
+void                            dtrace_ptss_free_page(struct proc* p, struct dtrace_ptss_page* ptss_page);
 
-void                           dtrace_ptss_enable(struct proc* p);
-void                           dtrace_ptss_exec_exit(struct proc* p);
-void                           dtrace_ptss_fork(struct proc* parent, struct proc* child);
+void                            dtrace_ptss_enable(struct proc* p);
+void                            dtrace_ptss_exec_exit(struct proc* p);
+void                            dtrace_ptss_fork(struct proc* parent, struct proc* child);
 
-#ifdef __cplusplus
+#ifdef  __cplusplus
 }
 #endif
 
-#endif /* _DTRACE_PTSS_H_ */
-
+#endif  /* _DTRACE_PTSS_H_ */