System statistical and call profiling

support by Rogier Meurs <rogier@meurs.org>.

kernel/system/do_profbuf.c

@@ -0,0 +1,55 @@
+/* The kernel call that is implemented in this file:
+ *   m_type:    SYS_PROFBUF
+ *
+ * The parameters for this kernel call are:
+ *    m7_p1:    PROF_CTL_PTR      (location of control struct)
+ *    m7_p2:    PROF_MEM_PTR      (location of profiling table)
+ *
+ * Changes:
+ *   14 Aug, 2006   Created (Rogier Meurs)
+ */
+
+#include "../system.h"
+
+#if CPROFILE
+
+/*===========================================================================*
+ *				do_profbuf				     *
+ *===========================================================================*/
+PUBLIC int do_profbuf(m_ptr)
+register message *m_ptr;    /* pointer to request message */
+{
+/* This kernel call is used by profiled system processes when Call
+ * Profiling is enabled. It is called on the first execution of procentry.
+ * By means of this kernel call, the profiled processes inform the kernel
+ * about the location of their profiling table and the control structure
+ * which is used to enable the kernel to have the tables cleared.
+ */ 
+  int proc_nr, len;
+  vir_bytes vir_dst;
+  struct proc *rp;                          
+
+  /* Store process name, control struct, table locations. */
+  isokendpt(m_ptr->m_source, &proc_nr);
+  rp = proc_addr(proc_nr);
+
+  cprof_proc_info[cprof_procs_no].endpt = who_e;
+  cprof_proc_info[cprof_procs_no].name = rp->p_name;
+
+  len = (phys_bytes) sizeof (void *);
+
+  vir_dst = (vir_bytes) m_ptr->PROF_CTL_PTR;
+  cprof_proc_info[cprof_procs_no].ctl =
+	  numap_local(proc_nr, vir_dst, len);
+
+  vir_dst = (vir_bytes) m_ptr->PROF_MEM_PTR;
+  cprof_proc_info[cprof_procs_no].buf =
+	  numap_local(proc_nr, vir_dst, len);
+
+  cprof_procs_no++;
+
+  return OK;
+}
+
+#endif /* CPROFILE */
+