| #!/usr/bin/env python |
| from __future__ import print_function |
| |
| import lldb |
| import shlex |
| |
| |
| @lldb.command("shadow") |
| def check_shadow_command(debugger, command, exe_ctx, result, dict): |
| '''Check the currently selected stack frame for shadowed variables''' |
| process = exe_ctx.GetProcess() |
| state = process.GetState() |
| if state != lldb.eStateStopped: |
| print("process must be stopped, state is %s" % lldb.SBDebugger.StateAsCString( |
| state), file=result) |
| return |
| frame = exe_ctx.GetFrame() |
| if not frame: |
| print("invalid frame", file=result) |
| return |
| # Parse command line args |
| command_args = shlex.split(command) |
| # TODO: add support for using arguments that are passed to this command... |
| |
| # Make a dictionary of variable name to "SBBlock and SBValue" |
| shadow_dict = {} |
| |
| num_shadowed_variables = 0 |
| # Get the deepest most block from the current frame |
| block = frame.GetBlock() |
| # Iterate through the block and all of its parents |
| while block.IsValid(): |
| # Get block variables from the current block only |
| block_vars = block.GetVariables(frame, True, True, True, 0) |
| # Iterate through all variables in the current block |
| for block_var in block_vars: |
| # Since we can have multiple shadowed variables, we our variable |
| # name dictionary to have an array or "block + variable" pairs so |
| # We can correctly print out all shadowed variables and whow which |
| # blocks they come from |
| block_var_name = block_var.GetName() |
| if block_var_name in shadow_dict: |
| shadow_dict[block_var_name].append(block_var) |
| else: |
| shadow_dict[block_var_name] = [block_var] |
| # Get the parent block and continue |
| block = block.GetParent() |
| |
| num_shadowed_variables = 0 |
| if shadow_dict: |
| for name in shadow_dict.keys(): |
| shadow_vars = shadow_dict[name] |
| if len(shadow_vars) > 1: |
| print('"%s" is shadowed by the following declarations:' % (name)) |
| num_shadowed_variables += 1 |
| for shadow_var in shadow_vars: |
| print(str(shadow_var.GetDeclaration()), file=result) |
| if num_shadowed_variables == 0: |
| print('no variables are shadowed', file=result) |