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