1#!/usr/bin/python 2 3import lldb 4import shlex 5 6@lldb.command("shadow") 7def check_shadow_command(debugger, command, result, dict): 8 target = debugger.GetSelectedTarget() 9 if not target: 10 print >>result, "invalid target" 11 return 12 process = target.GetProcess() 13 if not process: 14 print >>result, "invalid process" 15 return 16 thread = process.GetSelectedThread() 17 if not thread: 18 print >>result, "invalid thread" 19 return 20 frame = thread.GetSelectedFrame() 21 if not frame: 22 print >>result, "invalid frame" 23 return 24 # Parse command line args 25 command_args = shlex.split(command) 26 # TODO: add support for using arguments that are passed to this command... 27 28 # Make a dictionary of variable name to "SBBlock and SBValue" 29 var_dict = {} 30 31 # Get the deepest most block from the current frame 32 block = frame.GetBlock() 33 # Iterate through the block and all of its parents 34 while block.IsValid(): 35 # Get block variables from the current block only 36 block_vars = block.GetVariables(frame, True, True, True, 0) 37 # Iterate through all variables in the current block 38 for block_var in block_vars: 39 # Get the variable name and see if we already have a variable by this name? 40 block_var_name = block_var.GetName() 41 if block_var_name in var_dict: 42 # We already have seen a variable with this name, so it is shadowed 43 shadow_block_and_vars = var_dict[block_var_name] 44 for shadow_block_and_var in shadow_block_and_vars: 45 print shadow_block_and_var[0], shadow_block_and_var[1] 46 print 'is shadowed by:' 47 print block, block_var 48 # Since we can have multiple shadowed variables, we our variable 49 # name dictionary to have an array or "block + variable" pairs so 50 # We can correctly print out all shadowed variables and whow which 51 # blocks they come from 52 if block_var_name in var_dict: 53 var_dict[block_var_name].append([block, block_var]) 54 else: 55 var_dict[block_var_name] = [[block, block_var]] 56 # Get the parent block and continue 57 block = block.GetParent() 58 59 60