[assembler] Allow to pass custom buffer implementations

When generating an Assembler, you currently have two choices: Either
let the Assembler allocate a growable internal buffer, which is owned
by the Assembler. Or provide an externally allocated buffer, which
cannot grow.
This CL changes this interface to allow providing any implementation of
a buffer. The provided buffer can be a view to an externally owned
buffer, which still can grow.
This will be used to split WebAssembly compilation and code submission.
The buffer needs to be able to grow, but cannot be owned by the
Assembler because it has to survive until the code is submitted.

R=mstarzinger@chromium.org

Bug: v8:8689
Change-Id: Ib6c5ebffc8b71d0778944abac34f02c5cc7dbd79
Reviewed-on: https://chromium-review.googlesource.com/c/1411347
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#58848}
21 files changed
tree: 3adabca4819d150dddb3ebf249b20ecf6c2164df
  1. .clang-format
  2. .clang-tidy
  3. .editorconfig
  4. .git-blame-ignore-revs
  5. .gitattributes
  6. .gitignore
  7. .gn
  8. .vpython
  9. .ycm_extra_conf.py
  10. AUTHORS
  11. BUILD.gn
  12. CODE_OF_CONDUCT.md
  13. ChangeLog
  14. DEPS
  15. LICENSE
  16. LICENSE.fdlibm
  17. LICENSE.strongtalk
  18. LICENSE.v8
  19. LICENSE.valgrind
  20. OWNERS
  21. PRESUBMIT.py
  22. README.md
  23. WATCHLISTS
  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/
README.md

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://github.com/v8/v8/wiki

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 on the V8 wiki.