13af6ab5fSopenharmony_ci# Introduction 23af6ab5fSopenharmony_ci 33af6ab5fSopenharmony_ciGenerate a discrepancy report on the number of bytecode instructions generated by ES2ABC and V8. 43af6ab5fSopenharmony_ci 53af6ab5fSopenharmony_ci# Prepare V8 63af6ab5fSopenharmony_ci 73af6ab5fSopenharmony_ci## 1. Install depot_tools 83af6ab5fSopenharmony_ci 93af6ab5fSopenharmony_ci 103af6ab5fSopenharmony_ci```sh 113af6ab5fSopenharmony_cigit clone https://chromium.googlesource.com/chromium/tools/depot_tools.git 123af6ab5fSopenharmony_ciexport PATH=/path/to/depot_tools:$PATH 133af6ab5fSopenharmony_ci``` 143af6ab5fSopenharmony_ci 153af6ab5fSopenharmony_ci 163af6ab5fSopenharmony_ci## 2. fetch v8 code 173af6ab5fSopenharmony_ci 183af6ab5fSopenharmony_ciCreate a V8 source code directory in any directory and switch to it: 193af6ab5fSopenharmony_ci 203af6ab5fSopenharmony_ci```sh 213af6ab5fSopenharmony_cimkdir ~/v8 223af6ab5fSopenharmony_cicd ~/v8 233af6ab5fSopenharmony_ci``` 243af6ab5fSopenharmony_ci 253af6ab5fSopenharmony_ciGet the V8 source code and all its branches and dependencies using the fetch command 263af6ab5fSopenharmony_ci 273af6ab5fSopenharmony_ci```sh 283af6ab5fSopenharmony_cifetch v8 293af6ab5fSopenharmony_cicd v8 303af6ab5fSopenharmony_ci``` 313af6ab5fSopenharmony_ci 323af6ab5fSopenharmony_ci 333af6ab5fSopenharmony_ci## 3. Installing dependencies 343af6ab5fSopenharmony_ci 353af6ab5fSopenharmony_ciExecute the following commands in the V8 source directory to pull the latest changes and install any new generated dependencies. 363af6ab5fSopenharmony_ci 373af6ab5fSopenharmony_ci```sh 383af6ab5fSopenharmony_cigit pull 393af6ab5fSopenharmony_cigclient sync 403af6ab5fSopenharmony_ci``` 413af6ab5fSopenharmony_ci 423af6ab5fSopenharmony_ciNext, install the other build dependencies: 433af6ab5fSopenharmony_ci 443af6ab5fSopenharmony_ci```sh 453af6ab5fSopenharmony_ci./build/install-build-deps.sh 463af6ab5fSopenharmony_ci``` 473af6ab5fSopenharmony_ci 483af6ab5fSopenharmony_ci 493af6ab5fSopenharmony_ci## 4. compile V8 503af6ab5fSopenharmony_ci 513af6ab5fSopenharmony_ciUse the gm tool for V8 build. 523af6ab5fSopenharmony_ci 533af6ab5fSopenharmony_ci```sh 543af6ab5fSopenharmony_citools/dev/gm.py x64.release 553af6ab5fSopenharmony_ci``` 563af6ab5fSopenharmony_ci 573af6ab5fSopenharmony_ciThe path of the compiled V8 executable program d8 is as follows: 583af6ab5fSopenharmony_ci 593af6ab5fSopenharmony_ci```sh 603af6ab5fSopenharmony_ciout/x64.release/d8 613af6ab5fSopenharmony_ci``` 623af6ab5fSopenharmony_ci 633af6ab5fSopenharmony_ci 643af6ab5fSopenharmony_ci# Running the Script 653af6ab5fSopenharmony_ci 663af6ab5fSopenharmony_ci## Usage 673af6ab5fSopenharmony_ci 683af6ab5fSopenharmony_ci```sh 693af6ab5fSopenharmony_cipython3 parse_command.py -es2abc ES2ABC_PATH -v8 D8_PATH [arguments] 703af6ab5fSopenharmony_ci``` 713af6ab5fSopenharmony_ci 723af6ab5fSopenharmony_ci### Tail arguments 733af6ab5fSopenharmony_ci 743af6ab5fSopenharmony_ci+ `-es2abc`: path to the executable program es2abc. 753af6ab5fSopenharmony_ci+ `-v8`: path to the V8 executable d8. 763af6ab5fSopenharmony_ci 773af6ab5fSopenharmony_ci### Optional arguments 783af6ab5fSopenharmony_ci 793af6ab5fSopenharmony_ci+ `--add_case`: Add the file path of a single test case to be executed. 803af6ab5fSopenharmony_ci+ `--add_case_dir`: Add the directory where the test cases are to be executed and the script will automatically search for all cases in that directory (By default it filters cases with .js extension). 813af6ab5fSopenharmony_ci+ `--timeout`: Time limits for use case execution (In seconds). 823af6ab5fSopenharmony_ci 833af6ab5fSopenharmony_ci 843af6ab5fSopenharmony_ci# Test Result 853af6ab5fSopenharmony_ci 863af6ab5fSopenharmony_ciInstruction number discrepancy report: `./discrepancy_report.html` 87