tools/lldbmacros/pgtrace.py

   1 #! /usr/bin/env python
   2 # -*- coding: utf-8 -*-
   3
   4 from xnu import *
   5
   6 # Macro: pgtrace
   7 @lldb_command('showpgtrace')
   8 def ShowPgtrace(cmd_args=None, cmd_options={}):
   9     """ Display pgtrace buffer contents
  10         Usage: showpgtrace
  11     """
  12
  13     max_entry = kern.globals.pgtrace.size
  14     rd_idx = kern.globals.pgtrace.rdidx
  15     wr_idx = kern.globals.pgtrace.wridx
  16
  17     print "-"*80
  18     print "rd_idx=%d wr_idx=%d num_entries=%d max_entry=%d" % (rd_idx, wr_idx, wr_idx-rd_idx, max_entry)
  19     print "-"*80
  20
  21     rw_str = { GetEnumValue('pgtrace_rw_t::PGTRACE_RW_LOAD'): "R",
  22                 GetEnumValue('pgtrace_rw_t::PGTRACE_RW_STORE'): "W",
  23                 GetEnumValue('pgtrace_rw_t::PGTRACE_RW_PREFETCH'): "P" }
  24
  25     while rd_idx != wr_idx:
  26         clipped_idx = rd_idx % max_entry
  27         entry = kern.globals.pgtrace.logs + sizeof('log_t') * clipped_idx
  28         entry = kern.GetValueFromAddress(entry, 'log_t *')
  29
  30         entry_str = "[%d] id=%lu time=%lu %s " % (clipped_idx, entry.id, entry.res.rr_time, rw_str[int(entry.res.rr_rw)])
  31
  32         for i in range(entry.res.rr_num):
  33             entry_str += "%x=%x " % (entry.res.rr_addrdata[i].ad_addr, entry.res.rr_addrdata[i].ad_data)
  34
  35         print entry_str
  36
  37         rd_idx += 1
  38 # EndMacro