a537cb6a2d
This patch takes advantage of memory information from the module to avoid unnecessary reloads of the SSA environment after a Wasm call. As far as I can sse, the SSA envinronment consists of the mem_start and mem_size values. Both these values cannot ever change if: initial_mem_size == max_mem_size. Although this should be obviously true for memories defined in the module itself, some explanation may be necessary for imported memories. During module instantiation, the imported memory is checked as part of InstanceBuilder::ProcessImportedMemory. The following properties are verified: 1) The current size of the imported memory is >= the initial declared size 2) The maximal size of the imported memory is <= the maximal declared size The effective maximal limit will be min(imported_max, declared_max), hence the optimization will only trigger if the imported memory is already as large as it can be. Since memory growth is impossible, there is no point in reloading the environment anyway. Change-Id: Ie6c6ad278175d253b61131972a6db7530bd52b90 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3412082 Reviewed-by: Clemens Backes <clemensb@chromium.org> Commit-Queue: Clemens Backes <clemensb@chromium.org> Cr-Commit-Position: refs/heads/main@{#78782} |
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| CODE_OF_CONDUCT.md | ||
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| LICENSE.strongtalk | ||
| LICENSE.v8 | ||
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| PRESUBMIT.py | ||
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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.