5e0b94c4dc
This CL adds features to pack/unpack map words. Currently V8 cannot store extra metadata in object headers -- because V8 objects do not have a proper header, but only a map pointer at the start of the object. To store per-object metadata like marking data, a side table is required as the per-object metadata storage. This CL enables V8 to use higher unused bits in a 64-bit map word as per-object metadata storage. Map pointer stores come with an extra step to encode the metadata into the pointer (we call it "map packing"). Map pointer loads will also remove the metadata bits as well (we call it "map packing"). Since the map word is no longer a valid pointer after packing, we also change the tag of the packed map word to make it looks like a Smi. This helps various GC and barrier code to correctly skip them instead of blindly dereferencing this invalid pointer. A ninja flag `v8_enable_map_packing` is provided to turn this map-packing feature on and off. It is disabled by default. * Only works on x64 platform, with `v8_enable_pointer_compression` set to `false` Bug: v8:11624 Change-Id: Ia2bdf79553945e5fc0b0874c87803d2cc733e073 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2247561 Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Reviewed-by: Nico Hartmann <nicohartmann@chromium.org> Reviewed-by: Toon Verwaest <verwaest@chromium.org> Reviewed-by: Georg Neis <neis@chromium.org> Commit-Queue: Ulan Degenbaev <ulan@chromium.org> Cr-Commit-Position: refs/heads/master@{#73915}
250 lines
8.9 KiB
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250 lines
8.9 KiB
Plaintext
# Below is a list of people and organizations that have contributed
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# to the V8 project. Names should be added to the list like so:
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#
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# Name/Organization <email address>
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Google Inc. <*@google.com>
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The Chromium Authors <*@chromium.org>
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Sigma Designs Inc. <*@sdesigns.com>
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ARM Ltd. <*@arm.com>
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Hewlett-Packard Development Company, LP <*@palm.com>
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Igalia, S.L. <*@igalia.com>
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Joyent, Inc. <*@joyent.com>
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Bloomberg Finance L.P. <*@bloomberg.net>
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NVIDIA Corporation <*@nvidia.com>
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BlackBerry Limited <*@blackberry.com>
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Opera Software ASA <*@opera.com>
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Intel Corporation <*@intel.com>
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LG Electronics, Inc. <*@lge.com>
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Microsoft <*@microsoft.com>
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MIPS Technologies, Inc. <*@mips.com>
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Imagination Technologies, LLC <*@imgtec.com>
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Wave Computing, Inc. <*@wavecomp.com>
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Loongson Technology Corporation Limited <*@loongson.cn>
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Code Aurora Forum <*@codeaurora.org>
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Home Jinni Inc. <*@homejinni.com>
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IBM Inc. <*@*.ibm.com>
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IBM Inc. <*@ibm.com>
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Red Hat Inc. <*@redhat.com>
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Samsung <*@*.samsung.com>
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Samsung <*@samsung.com>
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RT-RK Computer Based System <*@rt-rk.com>
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Amazon, Inc <*@amazon.com>
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ST Microelectronics <*@st.com>
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Yandex LLC <*@yandex-team.ru>
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StrongLoop, Inc. <*@strongloop.com>
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Facebook, Inc. <*@fb.com>
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Facebook, Inc. <*@oculus.com>
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Vewd Software AS <*@vewd.com>
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Groupon <*@groupon.com>
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Meteor Development Group <*@meteor.com>
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Cloudflare, Inc. <*@cloudflare.com>
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Julia Computing, Inc. <*@juliacomputing.com>
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CodeWeavers, Inc. <*@codeweavers.com>
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Aaron Bieber <deftly@gmail.com>
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Aaron O'Mullan <aaron.omullan@gmail.com>
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Abdulla Kamar <abdulla.kamar@gmail.com>
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Adam Kallai <kadam@inf.u-szeged.hu>
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Akinori MUSHA <knu@FreeBSD.org>
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Alessandro Pignotti <alessandro@leaningtech.com>
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Alex Kodat <akodat@rocketsoftware.com>
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Alexander Botero-Lowry <alexbl@FreeBSD.org>
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Alexander Karpinsky <homm86@gmail.com>
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Alexander Neville <dark@volatile.bz>
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Alexandre Vassalotti <avassalotti@gmail.com>
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Alexis Campailla <alexis@janeasystems.com>
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Allan Sandfeld Jensen <allan.jensen@qt.io>
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Amos Lim <eui-sang.lim@samsung.com>
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Andreas Anyuru <andreas.anyuru@gmail.com>
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Andrew Paprocki <andrew@ishiboo.com>
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Andrei Kashcha <anvaka@gmail.com>
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Anna Henningsen <anna@addaleax.net>
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Antoine du Hamel <duhamelantoine1995@gmail.com>
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Anton Bikineev <ant.bikineev@gmail.com>
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Bangfu Tao <bangfu.tao@samsung.com>
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Daniel Shelton <d1.shelton@samsung.com>
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Ben Coe <bencoe@gmail.com>
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Ben Newman <ben@meteor.com>
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Ben Noordhuis <info@bnoordhuis.nl>
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Benjamin Tan <demoneaux@gmail.com>
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Bert Belder <bertbelder@gmail.com>
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Brendon Tiszka <btiszka@gmail.com>
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Brice Dobry <brice.dobry@futurewei.com>
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Burcu Dogan <burcujdogan@gmail.com>
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Caitlin Potter <caitpotter88@gmail.com>
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Chao Wang <chao.w@rioslab.org>
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Craig Schlenter <craig.schlenter@gmail.com>
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Charles Kerr <charles@charleskerr.com>
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Chengzhong Wu <legendecas@gmail.com>
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Choongwoo Han <cwhan.tunz@gmail.com>
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Chris Nardi <hichris123@gmail.com>
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Christopher A. Taylor <chris@gameclosure.com>
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Colin Ihrig <cjihrig@gmail.com>
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Cong Zuo <zckevinzc@gmail.com>
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Daniel Andersson <kodandersson@gmail.com>
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Daniel Bevenius <daniel.bevenius@gmail.com>
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Daniel James <dnljms@gmail.com>
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David Carlier <devnexen@gmail.com>
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David Manouchehri <david@davidmanouchehri.com>
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Deepak Mohan <hop2deep@gmail.com>
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Deon Dior <diaoyuanjie@gmail.com>
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Derek Tu <derek.t@rioslab.org>
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Dominic Chen <d.c.ddcc@gmail.com>
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Dominic Farolini <domfarolino@gmail.com>
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Douglas Crosher <dtc-v8@scieneer.com>
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Dusan Milosavljevic <dusan.m.milosavljevic@gmail.com>
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Eric Rannaud <eric.rannaud@gmail.com>
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Erich Ocean <erich.ocean@me.com>
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Evan Lucas <evan.lucas@help.com>
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Fedor Indutny <fedor@indutny.com>
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Felix Geisendörfer <haimuiba@gmail.com>
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Filipe David Manana <fdmanana@gmail.com>
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Franziska Hinkelmann <franziska.hinkelmann@gmail.com>
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Geoffrey Garside <ggarside@gmail.com>
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Gergely Nagy <ngg@ngg.hu>
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Gilang Mentari Hamidy <gilang@hamidy.net>
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Gus Caplan <me@gus.host>
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Gwang Yoon Hwang <ryumiel@company100.net>
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Haichuan Wang <hc.opensource@gmail.com>
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Hannu Trey <hannu.trey@gmail.com>
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Henrique Ferreiro <henrique.ferreiro@gmail.com>
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Hirofumi Mako <mkhrfm@gmail.com>
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Honggyu Kim <honggyu.kp@gmail.com>
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Huáng Jùnliàng <jlhwung@gmail.com>
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HyeockJin Kim <kherootz@gmail.com>
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Iain Ireland <iireland@mozilla.com>
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Ingvar Stepanyan <me@rreverser.com>
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Ioseb Dzmanashvili <ioseb.dzmanashvili@gmail.com>
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Isiah Meadows <impinball@gmail.com>
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Jaime Bernardo <jaime@janeasystems.com>
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Jan de Mooij <jandemooij@gmail.com>
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Jan Krems <jan.krems@gmail.com>
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Janusz Majnert <jmajnert@gmail.com>
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Jay Freeman <saurik@saurik.com>
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James Pike <g00gle@chilon.net>
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James M Snell <jasnell@gmail.com>
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Javad Amiri <javad.amiri@anu.edu.au>
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Ji Qiu <qiuji@iscas.ac.cn>
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Jianghua Yang <jianghua.yjh@alibaba-inc.com>
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Jiawen Geng <technicalcute@gmail.com>
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Jiaxun Yang <jiaxun.yang@flygoat.com>
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Joel Stanley <joel@jms.id.au>
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Johan Bergström <johan@bergstroem.nu>
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Jonathan Liu <net147@gmail.com>
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Julien Brianceau <jbriance@cisco.com>
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Junha Park <jpark3@scu.edu>
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JunHo Seo <sejunho@gmail.com>
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Junming Huang <kiminghjm@gmail.com>
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Kang-Hao (Kenny) Lu <kennyluck@csail.mit.edu>
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Karl Skomski <karl@skomski.com>
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Kevin Gibbons <bakkot@gmail.com>
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Kris Selden <kris.selden@gmail.com>
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Kyounga Ra <kyounga@alticast.com>
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Loo Rong Jie <loorongjie@gmail.com>
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Lu Yahan <yahan@iscas.ac.cn>
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Luis Reis <luis.m.reis@gmail.com>
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Luke Zarko <lukezarko@gmail.com>
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Maciej Małecki <me@mmalecki.com>
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Marcel Laverdet <marcel@laverdet.com>
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Marcin Cieślak <saper@marcincieslak.com>
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Marcin Wiącek <marcin@mwiacek.com>
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Martin Bidlingmaier <martin.bidlingmaier@gmail.com>
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Mateusz Czeladka <mateusz.szczap@gmail.com>
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Matheus Marchini <mat@mmarchini.me>
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Matheus Marchini <mmarchini@netflix.com>
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Mathias Bynens <mathias@qiwi.be>
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Matt Hanselman <mjhanselman@gmail.com>
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Matthew Sporleder <msporleder@gmail.com>
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Maxim Mazurok <maxim@mazurok.com>
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Maxim Mossienko <maxim.mossienko@gmail.com>
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Michael Lutz <michi@icosahedron.de>
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Michael Mclaughlin <m8ch88l@gmail.com>
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Michael Smith <mike@w3.org>
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Michaël Zasso <mic.besace@gmail.com>
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Mike Gilbert <floppymaster@gmail.com>
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Mike Pennisi <mike@mikepennisi.com>
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Mikhail Gusarov <dottedmag@dottedmag.net>
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Milton Chiang <milton.chiang@mediatek.com>
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Mu Tao <pamilty@gmail.com>
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Myeong-bo Shim <m0609.shim@samsung.com>
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Nicolas Antonius Ernst Leopold Maria Kaiser <nikai@nikai.net>
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Niek van der Maas <mail@niekvandermaas.nl>
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Niklas Hambüchen <mail@nh2.me>
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Noj Vek <nojvek@gmail.com>
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Oleksandr Chekhovskyi <oleksandr.chekhovskyi@gmail.com>
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Oliver Dunk <oliver@oliverdunk.com>
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Paolo Giarrusso <p.giarrusso@gmail.com>
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Patrick Gansterer <paroga@paroga.com>
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Peng Fei <pfgenyun@gmail.com>
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Peng Wu <peng.w@rioslab.org>
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Peng-Yu Chen <pengyu@libstarrify.so>
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Peter Rybin <peter.rybin@gmail.com>
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Peter Varga <pvarga@inf.u-szeged.hu>
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Peter Wong <peter.wm.wong@gmail.com>
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Paul Lind <plind44@gmail.com>
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Pavel Medvedev <pmedvedev@gmail.com>
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PhistucK <phistuck@gmail.com>
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Qingyan Li <qingyan.liqy@alibaba-inc.com>
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Qiuyi Zhang <qiuyi.zqy@alibaba-inc.com>
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Rafal Krypa <rafal@krypa.net>
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Raul Tambre <raul@tambre.ee>
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Ray Glover <ray@rayglover.net>
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Refael Ackermann <refack@gmail.com>
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Rene Rebe <rene@exactcode.de>
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Reza Yazdani <ryazdani@futurewei.com>
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Rick Waldron <waldron.rick@gmail.com>
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Rob Wu <rob@robwu.nl>
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Robert Meijer <robert.s.meijer@gmail.com>
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Robert Mustacchi <rm@fingolfin.org>
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Robert Nagy <robert.nagy@gmail.com>
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Robert O'Callahan <rocallahan@gmail.com>
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Rong Wang <wangrong089@gmail.com>
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Ross Kirsling <rkirsling@gmail.com>
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Ruben Bridgewater <ruben@bridgewater.de>
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Ryan Dahl <ry@tinyclouds.org>
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Sakthipriyan Vairamani (thefourtheye) <thechargingvolcano@gmail.com>
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Sander Mathijs van Veen <sander@leaningtech.com>
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Sandro Santilli <strk@keybit.net>
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Sanjoy Das <sanjoy@playingwithpointers.com>
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Seo Sanghyeon <sanxiyn@gmail.com>
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Shawn Anastasio <shawnanastasio@gmail.com>
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Shawn Presser <shawnpresser@gmail.com>
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Stefan Penner <stefan.penner@gmail.com>
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Sylvestre Ledru <sledru@mozilla.com>
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Taketoshi Aono <brn@b6n.ch>
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Tao Liqiang <taolq@outlook.com>
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Teddy Katz <teddy.katz@gmail.com>
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Thomas Young <wenzhang5800@gmail.com>
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Tiancheng "Timothy" Gu <timothygu99@gmail.com>
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Tobias Burnus <burnus@net-b.de>
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Tobias Nießen <tniessen@tnie.de>
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Ujjwal Sharma <usharma1998@gmail.com>
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Vadim Gorbachev <bmsdave@gmail.com>
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Varun Varada <varuncvarada@gmail.com>
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Victor Costan <costan@gmail.com>
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Vlad Burlik <vladbph@gmail.com>
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Vladimir Krivosheev <develar@gmail.com>
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Vladimir Shutoff <vovan@shutoff.ru>
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Wei Wu <lazyparser@gmail.com>
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Wenlu Wang <kingwenlu@gmail.com>
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Wenyu Zhao <wenyu.zhao@anu.edu.au>
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Wiktor Garbacz <wiktor.garbacz@gmail.com>
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Wouter Vermeiren <wouter.vermeiren@essensium.com>
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Xiaofang Zou <zouxiaofang@iscas.ac.cn>
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Xiaoyin Liu <xiaoyin.l@outlook.com>
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Yanbo Li <lybvinci@gmail.com>
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Yannic Bonenberger <contact@yannic-bonenberger.com>
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Yi Wang <wangyi8848@gmail.com>
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Yong Wang <ccyongwang@tencent.com>
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Youfeng Hao <ajihyf@gmail.com>
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Yu Yin <xwafish@gmail.com>
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Yusif Khudhur <yusif.khudhur@gmail.com>
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Zac Hansen <xaxxon@gmail.com>
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Zeynep Cankara <zeynepcankara402@gmail.com>
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Zhao Jiazhong <kyslie3100@gmail.com>
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Zhongping Wang <kewpie.w.zp@gmail.com>
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柳荣一 <admin@web-tinker.com>
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Tianping Yang <yangtianping@oppo.com>
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Takeshi Yoneda <takeshi@tetrate.io>
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