9cf089e968
For variable proxies in a function inside an eval scope that point to a dynamic variable in the eval scope, the current scope resolution will find this variable only when the function is eagerly compiled, as the eval scope only exists during top-level eval compilation. This causes a mismatch between lazy- and eager- compiled functions. With this patch, we skip these dynamic variables during lookup, so that the lookup for the variable proxy always finds a kDynamicLocal or kDynamicGlobal, both when compiled lazily and eagerly. This is a minor pessimisation of performance (as we know that the lookup has to be dynamic), but unblocks other improvements which require idempotent bytecode generation (such as lazy source positions). Note that the alternative, of simply not tracking dynamic variables on the eval scope at all, is not viable due to needing this information during conflict detection. Bug: v8:8510 Bug: v8:9511 Change-Id: Ifa72ec05e9a97b7be418912340081b9656765fd4 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1733077 Commit-Queue: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Dan Elphick <delphick@chromium.org> Reviewed-by: Toon Verwaest <verwaest@chromium.org> Cr-Commit-Position: refs/heads/master@{#63051} |
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| custom_deps | ||
| docs | ||
| gni | ||
| include | ||
| infra | ||
| samples | ||
| src | ||
| test | ||
| testing | ||
| third_party | ||
| tools | ||
| .clang-format | ||
| .clang-tidy | ||
| .editorconfig | ||
| .flake8 | ||
| .git-blame-ignore-revs | ||
| .gitattributes | ||
| .gitignore | ||
| .gn | ||
| .vpython | ||
| .ycm_extra_conf.py | ||
| AUTHORS | ||
| BUILD.gn | ||
| ChangeLog | ||
| CODE_OF_CONDUCT.md | ||
| codereview.settings | ||
| COMMON_OWNERS | ||
| DEPS | ||
| ENG_REVIEW_OWNERS | ||
| INFRA_OWNERS | ||
| INTL_OWNERS | ||
| LICENSE | ||
| LICENSE.fdlibm | ||
| LICENSE.strongtalk | ||
| LICENSE.v8 | ||
| LICENSE.valgrind | ||
| MIPS_OWNERS | ||
| OWNERS | ||
| PPC_OWNERS | ||
| PRESUBMIT.py | ||
| README.md | ||
| S390_OWNERS | ||
| WATCHLISTS | ||
V8 JavaScript Engine
V8 is Google's open source JavaScript engine.
V8 implements ECMAScript as specified in ECMA-262.
V8 is written in C++ and is used in Google Chrome, the open source browser from Google.
V8 can run standalone, or can be embedded into any C++ application.
V8 Project page: https://v8.dev/docs
Getting the Code
Checkout depot tools, and run
fetch v8
This will checkout V8 into the directory v8 and fetch all of its dependencies.
To stay up to date, run
git pull origin
gclient sync
For fetching all branches, add the following into your remote
configuration in .git/config:
fetch = +refs/branch-heads/*:refs/remotes/branch-heads/*
fetch = +refs/tags/*:refs/tags/*
Contributing
Please follow the instructions mentioned at v8.dev/docs/contribute.