3f1f001a67
On Windows ARM64, OS stack walking does not work because the V8 ARM64 backend doesn't emit unwinding info and also because it doesn't emit ABI compliant stack frames. This was fixed for Windows X64 (https://crrev.com/c/1469329) and documented below: https://docs.google.com/document/d/1-wf50jFlii0c_Pr52lm2ZU-49m220nhYMrHDi3vXnh0 This problem can be fixed similarly for Windows ARM64 by observing that V8 frames usually all have the same prolog which maintains a chain via frame pointer (fp or x29 register). stp fp, lr, [sp, ...] One exception is JSEntry which stops fp pointer chain and needs to be handled specially. So it is possible to define XDATA with UNWIND_CODE which specify how Windows should walk through V8 dynamic frames. The same as X64, since V8 Code objects are all allocated in the same code-range for an Isolate, it is possible to register at most 2 XDATA and a group of PDATA entries to cover stack walking for all the code generated inside that code-range. This is more than 1 PDATA/XDATA because according to the Windows ARM64 exeption handling document, 1 PDATA can cover less than 1MB code range (see below doc). https://docs.microsoft.com/en-us/cpp/build/arm64-exception-handling This PR implements stackwalk for Windows ARM64 to be on par with X64, including embedded builtins, jitted code and wasm jitted code, but not including register handler for handling exception only, because there is no backward compatibility to maintain for Windows ARM64 which was released since 1709 windows build. Bug: chromium:893460 Change-Id: Ic74cbdad8af5cf342185030a4c53796f12ea5429 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1701133 Reviewed-by: Michael Starzinger <mstarzinger@chromium.org> Reviewed-by: Jakob Gruber <jgruber@chromium.org> Commit-Queue: Jakob Gruber <jgruber@chromium.org> Cr-Commit-Position: refs/heads/master@{#63002} |
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| samples | ||
| src | ||
| test | ||
| testing | ||
| third_party | ||
| tools | ||
| .clang-format | ||
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| .editorconfig | ||
| .flake8 | ||
| .git-blame-ignore-revs | ||
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| .vpython | ||
| .ycm_extra_conf.py | ||
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| BUILD.gn | ||
| ChangeLog | ||
| CODE_OF_CONDUCT.md | ||
| codereview.settings | ||
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| DEPS | ||
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| INTL_OWNERS | ||
| LICENSE | ||
| LICENSE.fdlibm | ||
| LICENSE.strongtalk | ||
| LICENSE.v8 | ||
| LICENSE.valgrind | ||
| MIPS_OWNERS | ||
| OWNERS | ||
| PPC_OWNERS | ||
| PRESUBMIT.py | ||
| README.md | ||
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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.