| # Copyright 2018 The Chromium Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| """ |
| Creates a SVG graph of the view hierarchy, when stopped in a |
| method of an object that inherits from views::View. Requires |
| graphviz. |
| |
| For more info see |
| chromium/src/+/HEAD/docs/graphical_debugging_aid_chromium_views.md |
| |
| To make this command available, add the following to your ~/.lldbinit: |
| command script import {Path to SRC Root}/tools/lldb/lldb_viewg.py |
| |
| Usage: type `viewg` at the LLDB prompt, given the conditions above. |
| """ |
| |
| import lldb |
| import os |
| |
| def view_graph(debugger, command, result, internal_dict): |
| dot = os.path.expanduser("~/state.dot") |
| svg = os.path.splitext(dot)[0] + ".svg" |
| |
| process = debugger.GetSelectedTarget().GetProcess() |
| frame = process.GetSelectedThread().GetSelectedFrame() |
| |
| cstr_address = frame.EvaluateExpression("views::PrintViewGraph(this).c_str()") |
| if not cstr_address.GetError().Success(): |
| return |
| str_size = frame.EvaluateExpression("(size_t)strlen(%s)" |
| % cstr_address.GetValue()) |
| if not str_size.GetError().Success(): |
| return |
| error = lldb.SBError() |
| dot_str = process.ReadCStringFromMemory(int(cstr_address.GetValue(), 16), |
| str_size.GetValueAsUnsigned(), error) |
| if not error.Success(): |
| return |
| |
| with open(dot, "w") as f: |
| f.write(dot_str) |
| os.system("dot -Tsvg -o %s %s" % (svg, dot)) |
| |
| def __lldb_init_module(debugger, internal_dict): |
| debugger.HandleCommand('command script add -f lldb_viewg.view_graph viewg') |