Reland "Generate unwind info on Win/x64 by default"

The original CL title was updated to reflect CL contents. The
--win64-unwinding-info flag still exists but it is set by default.

This is a reland of efd8c2d9752c4206966dfd72e4794e025b9843e1

Original change's description:
> Remove --win64-unwinding-info flag and always generate unwind info on Win/x64
> The generation of unwind info to enable stack walking on Windows/x64
> ( was implemented
> behind a temporary flag, in order to coordinate these changes with the
> corresponding changes in Chromium.
> The required changes to Chromium
> ( have also
> been merged, so we can now remove the flag and enable the generation of stack
> unwinding info by default on Windows/x64.
> Bug: v8:3598
> Change-Id: I88814aaeabecc007f5262227aa0681a1d16156d5
> Reviewed-on:
> Reviewed-by: Michael Starzinger <>
> Reviewed-by: Jakob Gruber <>
> Reviewed-by: Ulan Degenbaev <>
> Commit-Queue: Paolo Severini <>
> Cr-Commit-Position: refs/heads/master@{#61020}

Bug: v8:3598, chromium:958035
Change-Id: Ie53b39f3bb31567797a61e5110685284c266c1f9
Commit-Queue: Jakob Gruber <>
Reviewed-by: Jakob Gruber <>
Reviewed-by: Michael Starzinger <>
Reviewed-by: Ulan Degenbaev <>
Cr-Commit-Position: refs/heads/master@{#61368}
5 files changed
tree: 872be576337e769decf0c6e8a851cd7871697a49
  1. .clang-format
  2. .clang-tidy
  3. .editorconfig
  4. .git-blame-ignore-revs
  5. .gitattributes
  6. .gitignore
  7. .gn
  8. .vpython
  13. ChangeLog
  14. DEPS
  16. LICENSE.fdlibm
  17. LICENSE.strongtalk
  18. LICENSE.v8
  19. LICENSE.valgrind
  20. OWNERS
  24. benchmarks/
  25. build_overrides/
  26. codereview.settings
  27. custom_deps/
  28. docs/
  29. gni/
  30. include/
  31. infra/
  32. samples/
  33. snapshot_toolchain.gni
  34. src/
  35. test/
  36. testing/
  37. third_party/
  38. tools/

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:

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/*


Please follow the instructions mentioned at