1# Tool for visualizing window manager traces 2 3## Developing WinScope 4When the trace is enabled, Window Manager and Surface Flinger capture and 5save current state to a file at each point of interest. 6`frameworks/base/core/proto/android/server/windowmanagertrace.proto` 7and `frameworks/native/services/surfaceflinger/layerproto/layerstrace.proto` 8contain the proto definitions for their internal states. 9 10### Checking out code and setting up environment 11* [Download Android source](https://source.android.com/setup/build/downloading) 12* Navigate to `development/tools/winscope` 13* Run `npm install` 14 15### Build & test & deploy changes 16* Navigate to `development/tools/winscope` 17* Run `npm run` to get the list of available commands 18 19### Update IntDefMapping 20* Build `framework-minus-apex-intdefs` module and a preprocessor will 21 generate the latest IntDefMapping. From the `ANDROID_ROOT` run: 22``` 23. build/envsetup.sh 24m framework-minus-apex-intdefs 25``` 26 27* Copy the generated `intDefMapping.json` files to the `prebuilts` repo. 28``` 29python3 -c 'import sys,json,collections; print(json.dumps(collections.OrderedDict(sorted(collections.ChainMap(*map(lambda x:json.load(open(x)), sys.argv[1:])).items())), indent=2))' $(find out/soong/.intermediates/frameworks/base -iname intDefMapping.json) > ./prebuilts/misc/common/winscope/intDefMapping.json 30``` 31 32* Upload the changes. 33``` 34cd ./prebuilts/misc/common/winscope 35repo start intdef-update 36git commit -am "Update intdef mapping" "Test: N/A" 37repo upload --cbr . 38``` 39 40### Building with internal extensions 41Internal paths in vendor/ which are not available in AOSP must be replaced by 42stub files. See getWaylandSafePath for an example 43