xnu-6153.101.6.tar.gz

[apple/xnu.git] / osfmk / kern / backtrace.h

diff --git a/osfmk/kern/backtrace.h b/osfmk/kern/backtrace.h
index 8b56b26df075a4334f0a06f63f2d11fe184d491f..4123482e1988abf9a8f644b3e5d299f71bd58839 100644 (file)
--- a/osfmk/kern/backtrace.h
+++ b/osfmk/kern/backtrace.h
@@ -108,17 +108,20 @@ unsigned int backtrace_interrupted(uintptr_t *bt, unsigned int btlen,
  * thread, nor can it be called from interrupt context or with interrupts
  * disabled.
  *
- * @param btwritten On success, the number of return addresses written is stored
- * here.
+ * @param error The precise error code that occurred is stored here, or 0 if no
+ * error occurred.
  *
  * @param user64 On success, true is stored here if user space was running in
  * 64-bit mode, and false is stored otherwise.
  *
- * @return Returns 0 on success and an errno value on error.
+ * @param was_truncated true is stored here if the full stack could not be written
+ * to bt.
+ *
+ * @return Returns the number of frames written to bt.
  *
  * @seealso backtrace
  */
-int backtrace_user(uintptr_t *bt, unsigned int btlen, unsigned int *btwritten,
+unsigned int backtrace_user(uintptr_t *bt, unsigned int btlen, int *error,
     bool *user64, bool *was_truncated);
 
 /*
@@ -134,8 +137,8 @@ int backtrace_user(uintptr_t *bt, unsigned int btlen, unsigned int *btwritten,
  *
  * @see backtrace_user
  */
-int backtrace_thread_user(void *thread, uintptr_t *bt, unsigned int btlen,
-    unsigned int *btwritten, bool *user64, bool *was_truncated);
+unsigned int backtrace_thread_user(void *thread, uintptr_t *bt,
+    unsigned int btlen, int *error, bool *user64, bool *was_truncated);
 
 __END_DECLS