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Clemens Backes 618a28883c [wasm][memory64] Fix types used for bounds checks 
The memory offset is read as a u64 in the memory64 proposal, independent
of the actual type of the memory. The actual memory size of a module (at
runtime) can only be within intptr_t/uintptr_t range though. This
assumption was already used when constructing the TurboFan graph, but
the C++ types did not reflect it yet.

This CL fixes that:

1) Use uint64_t type for bounds checks (only within the method for now,
   callers still pass a uint32_t).
2) Use uintptr_t for storing the minimum and maximum possible memory
   size at runtime (in CompilationEnv); clamp memory sizes to values
   that can actually happen at runtime.

R=manoskouk@chromium.org

Bug: v8:10949
Change-Id: I6559f9a3abc2aa338eba4618479456f6efb5e772
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2426405
Reviewed-by: Manos Koukoutos <manoskouk@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70121}
2020-09-24 16:34:07 +00:00
build_overrides tracing: Enable using Perfetto client library from Chromium 2020-05-11 11:17:57 +00:00
custom_deps Use relative paths to OWNERS files 2019-08-12 13:52:52 +00:00
docs Add OWNERS for docs/ 2019-05-15 12:06:15 +00:00
gni v8: Expand is_linux to is_linux || is_chromeos. 2020-09-14 10:11:24 +00:00
include [wasm][ukm] Add tests for Wasm events (reland) 2020-09-24 12:05:27 +00:00
infra [test] Run extra variants on MacOS-arm64 2020-09-22 18:13:28 +00:00
samples [api][cleanup] Use Template::Set with const char* name 2020-09-09 15:39:36 +00:00
src [wasm][memory64] Fix types used for bounds checks 2020-09-24 16:34:07 +00:00
test [test] Tests should only invoke NewSpace::Grow in safepoint 2020-09-24 16:14:10 +00:00
testing Roll v8/third_party/googletest/src/ 10b1902d8..e3f0319d8 (43 commits) 2020-04-15 07:23:10 +00:00
third_party [csa][cleanup] Remove ParameterMode/TNodify StoreFixedDoubleArrayElement 2020-08-26 17:14:44 +00:00
tools [tools] Add markers to system-analyzer source panel 2020-09-23 13:06:11 +00:00
.clang-format [clang-format] Don't derive pointer alignment 2017-01-17 09:28:19 +00:00
.clang-tidy [tool] Remove unfixed clang-tidy warnings to ease use. 2018-10-26 07:40:32 +00:00
.editorconfig Add .editorconfig 2017-07-28 13:39:24 +00:00
.flake8 Add .flake8 to allow for python style checking. 2019-07-19 21:44:03 +00:00
.git-blame-ignore-revs [infra] Update .git-blame-ignore-revs 2020-03-03 12:59:13 +00:00
.gitattributes .gitattributes: Mark minified emscripten js files as -diff 2018-09-19 16:27:10 +00:00
.gitignore Revert "[presubmit] Add JS formatting for tools/system-analyzer" 2020-07-17 10:33:40 +00:00
.gn [build] Dynamically decide if to use system xcode 2019-07-29 08:20:24 +00:00
.vpython [tools] Implement confidence-based number of runs 2019-05-09 09:42:28 +00:00
.ycm_extra_conf.py Fix ycm config for headers without source 2019-12-09 11:59:21 +00:00
AUTHORS Adding Red Hat to the list of Authorized contributors. 2020-09-16 12:34:39 +00:00
BUILD.gn Revert "[torque] refactor: use -tq only in filenames derived from .tq files" 2020-09-22 17:20:30 +00:00
CODE_OF_CONDUCT.md
codereview.settings Make Gerrit the default code review for V8 2017-06-30 17:37:37 +00:00
COMMON_OWNERS Adding vahl@ to the common owners to be able to handle 2020-08-21 09:04:56 +00:00
DEPS Revert "Update V8 DEPS." 2020-09-24 09:09:27 +00:00
ENG_REVIEW_OWNERS Add eng review owners as escalation path 2019-05-15 19:12:10 +00:00
INFRA_OWNERS Add team members as owners 2020-08-18 08:29:04 +00:00
INTL_OWNERS add ftang as owner 2020-04-24 19:19:36 +00:00
LICENSE [wasm] Draft version of C/C++ Wasm API 2019-04-17 16:00:26 +00:00
LICENSE.fdlibm Add LICENSE.fdlibm for all the fdlibm imported sources. 2016-06-09 07:17:03 +00:00
LICENSE.strongtalk
LICENSE.v8
MIPS_OWNERS Move architecture dependent files 2019-05-28 14:02:15 +00:00
OWNERS Add syg@chromium.org as DEPS owner for test262 rolls 2019-09-17 19:29:11 +00:00
PPC_OWNERS Adding Red Hat to the list of Authorized contributors. 2020-09-16 12:34:39 +00:00
PRESUBMIT.py [presubmit] Allow use of test functions in runtime-test.cc 2020-08-10 12:12:55 +00:00
README.md [docs] Change links from old wiki to v8.dev 2019-03-07 12:13:30 +00:00
S390_OWNERS Adding Red Hat to the list of Authorized contributors. 2020-09-16 12:34:39 +00:00
WATCHLISTS Stop watching for API changes in WATCHLISTS 2020-04-08 07:06:45 +00:00

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://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.