b22f0e6d7b
For lazy compilation there is one generic lazy compilation builtin that spills all registers on the stack and then triggers the compilation of the called function. Some of these registers may contain references. If a GC was triggered during lazy compilation, the GC would have to know which spill slots on the stack contain references. This CL adds a check to guarantee that no GC can be triggered during lazy compilation. Thereby it is not necessary for the GC to know which spill slots contain references. If successful, lazy compilation indeed does not allocate on the heap and therefore cannot trigger a GC. However, when compilation fails, an error objects needs to be allocated and thrown. This allocation may trigger a GC, but that's not a problem, because the reference parameters which may get corrupted by the GC will not be used anyways, because the called function will never get executed after the failed compilation. R=clemensb@chromium.org Fixes: v8:11366 Change-Id: Ic526d169d4e80ba83f517970ff234e669f854331 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3599474 Reviewed-by: Clemens Backes <clemensb@chromium.org> Commit-Queue: Andreas Haas <ahaas@chromium.org> Cr-Commit-Position: refs/heads/main@{#80187} |
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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.