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  1. 04 Apr, 2018 25 commits
  3. 03 Apr, 2018 15 commits
    • Clemens Hammacher's avatar
      Revert "Implement a new spec for timezone offset calculation" · 965edc0e
      Clemens Hammacher authored 
      This reverts commit dbdede01.

Reason for revert: Fails webkit_tests, blocks roll: https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064

Original change's description:
> Implement a new spec for timezone offset calculation
> 
> https://github.com/tc39/ecma262/pull/778 was recently merged
> to Ecma 262.
> 
> It changes the way to convert between "local time" and UTC in such
> a way that it'd work for all timezones whether or not there has
> been any change in the timezone offset of the standard time. For
> instance, Europe/Moscow and some parts of US state of Indiana have
> changed the standard (non-DST) timezone offset a few times. The
> previous spec assumes that the the standard timezone offset is
> constant, but the new spec take into account the offset change
> history.
> 
> In addition, it specifies a new way to calculate the timezone
> offset during a timezone transition (either in and
> out of DST or timezone offset shift).
> 
> During a negative transition (e.g.  fall backward / getting
> out of DST), repeated times are to be interpreted as if the
> offset before the transition is in effect.
> 
> During a positive transition (e.g. spring forward / getting
> into DST), skipped times are to be treated similarly. That
> is, they are to be interpreted as if the offset before the
> transition is in effect.
> 
> With icu-timezone-data, v8 is compliant to the new spec for the
> past and the future as well as now whether or not the standard
> timezone offset of a given timezone has changed over time
> (e.g. Europe/Moscow, Pacific/Apia). With icu-timezone-data,
> Australia/Lord_Howe (30 minute DST change) also works per spec.
> 
> Without icu-timezone-data, it works only for timezones of which
> the standard timezone offset is the same as the current offset
> (e.g. most North American timezones other than parts of Indiana)
> and of which the DST shift is an hour. For instance, it doesn't work
> for Europe/Moscow in 2010 when the standard timezone offset was
> +4h because the current (2018) standard timezone offset is +3h. Neither
> does it for Lord Howe in Australia with the DST shift of 0.5 hr.
> 
> This CL used to require one of the two ICU CLs below, but not
> any more.
> 
>   https://chromium-review.googlesource.com/c/chromium/deps/icu/+/572652
>   https://chromium-review.googlesource.com/851265  (a proposed CL to the
>   upstream ICU).
> 
> Bug: v8:3547,chromium:417640,v8:5714
> Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
> Change-Id: Ib162295da5bee31b2390bd0918157014aebd3e33
> Reviewed-on: https://chromium-review.googlesource.com/572148
> Commit-Queue: Jungshik Shin <jshin@chromium.org>
> Reviewed-by: Daniel Ehrenberg <littledan@chromium.org>
> Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#52332}

TBR=adamk@chromium.org,littledan@chromium.org,mlippautz@chromium.org,jshin@chromium.org

Change-Id: I6b3bf4427c761b106280d565a3912cd8e25cf87e
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:3547, chromium:417640, v8:5714
Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Reviewed-on: https://chromium-review.googlesource.com/994192Reviewed-by: 's avatarClemens Hammacher <clemensh@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52338}
      965edc0e
    • Sathya Gunasekaran's avatar
      Reland "[test] Add JSTest benchmark for object literal spread" · 2ade52e9
      Sathya Gunasekaran authored 
      This reverts commit cd1dd34f.

Patchset 1 is the original CL that was reverted. Patchset 2 has the
fix.

TBR=bmeurer@chromium.org

Bug: v8:7611
Change-Id: I15291175ab894ef667c001e1b21b8b220e1f9b48
Reviewed-on: https://chromium-review.googlesource.com/993995Reviewed-by: 's avatarSathya Gunasekaran <gsathya@chromium.org>
Commit-Queue: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52337}
      2ade52e9
    • Nico Weber's avatar
      Remove `pragma optimize` from v8. · d8840043
      Nico Weber authored 
      This instance of `pragma optimize` was from long ago when we built with
frame pointers disabled. We always build with frame pointers on these
days.

(Also, clang-cl ignores this pragma and will warn about it.)

Bug: chromium:505314
Change-Id: Ia125c9c54e6ec486247241102de1cb62c72d268b
Reviewed-on: https://chromium-review.googlesource.com/993423
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: 's avatarJakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52336}
      d8840043
    • Ben Smith's avatar
      [wasm] Implement WebAssembly.Global object · 2e197ba6
      Ben Smith authored 
      This change implements the WebAssembly.Global object and constructor,
but none of the accessors or functions.

There is a new flag to enable this: --experimental-wasm-mut-global.

Change-Id: Ifeb270d57392d7ca0900c80c0038932c96ee8b61
Reviewed-on: https://chromium-review.googlesource.com/989296
Commit-Queue: Ben Smith <binji@chromium.org>
Reviewed-by: 's avatarMichael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52335}
      2e197ba6
    • Eric Holk's avatar
      Revert "[wasm] Always enable guard regions on 64-bit platforms" · 76e79f0f
      Eric Holk authored 
      This reverts commit 0cd7468b.

Reason for revert: Blocks v8 roll into chromium: https://crbug.com/828499

Original change's description:
> [wasm] Always enable guard regions on 64-bit platforms
> 
> This change makes full 8 GiB guard regions always enabled on 64-bit
> platforms.
> 
> Additionally, since all Wasm memory allocation paths have some form of
> guard regions, this removes and simplifies most of the logic around
> whether to enable guard regions.
> 
> R=​gdeepti@chromium.org
> 
> Change-Id: Idf3fbcc11ac70ea2ee7eb88c2173d6a1410395e1
> Reviewed-on: https://chromium-review.googlesource.com/985142
> Commit-Queue: Eric Holk <eholk@chromium.org>
> Reviewed-by: Brad Nelson <bradnelson@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#52310}

TBR=bradnelson@chromium.org,gdeepti@chromium.org,eholk@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Change-Id: I126b5afe283a4fe08adfa301e637d2641c29cccd
Reviewed-on: https://chromium-review.googlesource.com/993160Reviewed-by: 's avatarEric Holk <eholk@chromium.org>
Commit-Queue: Eric Holk <eholk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52334}
      76e79f0f
    • Ulan Degenbaev's avatar
      [heap] Optimize for memory usage near OOM. · cf52c101
      Ulan Degenbaev authored 
      This patch enables ShouldOptimizeForMemoryUsage if the old generation
size is within 1/8th of the max old generation size.

This patch also passes the reduce-memory flag to incremental marking
whenever ShouldOptimizeForMemoryUsage is enabled.

Bug: chromium:824214
Change-Id: I5cfc0566ca0e23dfa1b8c0439a4e67424ddc852d
Reviewed-on: https://chromium-review.googlesource.com/973524
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: 's avatarHannes Payer <hpayer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52333}
      cf52c101
    • Jungshik Shin's avatar
      Implement a new spec for timezone offset calculation · dbdede01
      Jungshik Shin authored 
      https://github.com/tc39/ecma262/pull/778 was recently merged
to Ecma 262.

It changes the way to convert between "local time" and UTC in such
a way that it'd work for all timezones whether or not there has
been any change in the timezone offset of the standard time. For
instance, Europe/Moscow and some parts of US state of Indiana have
changed the standard (non-DST) timezone offset a few times. The
previous spec assumes that the the standard timezone offset is
constant, but the new spec take into account the offset change
history.

In addition, it specifies a new way to calculate the timezone
offset during a timezone transition (either in and
out of DST or timezone offset shift).

During a negative transition (e.g.  fall backward / getting
out of DST), repeated times are to be interpreted as if the
offset before the transition is in effect.

During a positive transition (e.g. spring forward / getting
into DST), skipped times are to be treated similarly. That
is, they are to be interpreted as if the offset before the
transition is in effect.

With icu-timezone-data, v8 is compliant to the new spec for the
past and the future as well as now whether or not the standard
timezone offset of a given timezone has changed over time
(e.g. Europe/Moscow, Pacific/Apia). With icu-timezone-data,
Australia/Lord_Howe (30 minute DST change) also works per spec.

Without icu-timezone-data, it works only for timezones of which
the standard timezone offset is the same as the current offset
(e.g. most North American timezones other than parts of Indiana)
and of which the DST shift is an hour. For instance, it doesn't work
for Europe/Moscow in 2010 when the standard timezone offset was
+4h because the current (2018) standard timezone offset is +3h. Neither
does it for Lord Howe in Australia with the DST shift of 0.5 hr.

This CL used to require one of the two ICU CLs below, but not
any more.

  https://chromium-review.googlesource.com/c/chromium/deps/icu/+/572652
  https://chromium-review.googlesource.com/851265  (a proposed CL to the
  upstream ICU).

Bug: v8:3547,chromium:417640,v8:5714
Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Change-Id: Ib162295da5bee31b2390bd0918157014aebd3e33
Reviewed-on: https://chromium-review.googlesource.com/572148
Commit-Queue: Jungshik Shin <jshin@chromium.org>
Reviewed-by: 's avatarDaniel Ehrenberg <littledan@chromium.org>
Reviewed-by: 's avatarMichael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52332}
      dbdede01
    • Igor Sheludko's avatar
      [builtins] Fix fast path of Function.prototype.bind. · ef01379e
      Igor Sheludko authored 
      Bug: chromium:827013
Change-Id: I07a04cbe278b35dcd822d71d0a39a19aa9b46eb3
Reviewed-on: https://chromium-review.googlesource.com/993053
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Reviewed-by: 's avatarBenedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52331}
      ef01379e
    • Ben Smith's avatar
      [wasm] Reloc external refs when deserializing · fae8a588
      Ben Smith authored 
      This is a follow-up to https://chromium-review.googlesource.com/981687.

When a wasm function has a large stack frame, the x64 code generator
performs the stack overflow check before constructing the frame. This
requires the use of the `address_of_real_stack_limit` external
reference.

This reference is thread local, so if it is not relocated the stack
overflow check will always fail.

Bug: chromium:808848
Change-Id: I0edf3fe5a006242fc50d0bff44cd9dd0e7d85bd9
Reviewed-on: https://chromium-review.googlesource.com/982906
Commit-Queue: Ben Smith <binji@chromium.org>
Reviewed-by: 's avatarMichael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52330}
      fae8a588
    • Clemens Hammacher's avatar
      [Liftoff] Add test for binops on different registers · 229ce29a
      Clemens Hammacher authored 
      This adds a systematic test for binary operations on different sets of
registers. By loading a number of values from memory to locals, we
create a cache state where all registers are used to hold local
variables. We then pick two of them and perform a binary operation on
them.

R=titzer@chromium.org

Bug: v8:7589, v8:6600
Change-Id: I2a4855810bb5c39247688c43cbe9d12d64fbc181
Reviewed-on: https://chromium-review.googlesource.com/992412
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: 's avatarBen Titzer <titzer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52329}
      229ce29a
    • Erik Luo's avatar
      [debug] use flag to decide whether CallHandlerInfo has side effect · ce066032
      Erik Luo authored 
      Makes CallHandlerInfo its own instance type, with an additional
map to distinguish side-effect-free handlers. In a followup, we
can expose an API flag to set the map.

This CL does not support whitelisting calls to ObjectTemplates
that use SetCallAsFunctionHandler().

Bug: v8:7515
Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng
Change-Id: Ie32fe144046a9fae3e3b1ea5602b0da3db8a5616
Reviewed-on: https://chromium-review.googlesource.com/965741Reviewed-by: 's avatarHannes Payer <hpayer@chromium.org>
Reviewed-by: 's avatarYang Guo <yangguo@chromium.org>
Commit-Queue: Erik Luo <luoe@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52328}
      ce066032
    • Clemens Hammacher's avatar
      [Liftoff][ia32] Avoid register overwrite on 64 bit shift · c83af36f
      Clemens Hammacher authored 
      On ia32, the implementation of 64-bit shifts first moved {src} into
{dst}, then {amount} into {ecx}. This fails if {dst} overlaps {amount},
because {amount} would be overwritten before being used. Just changing
the order to these two moves would also not be correct, since {src} can
contain {ecx}.
Thus, implement this via a general parallel register move, which
resolves cycles automatically.

R=titzer@chromium.org

Bug: v8:7589, v8:6600
Change-Id: I2556b9aa66a89a067372b7713dbbb3d71d2f923f
Reviewed-on: https://chromium-review.googlesource.com/981134
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: 's avatarBen Titzer <titzer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52327}
      c83af36f
    • Sergiy Byelozyorov's avatar
      [tools] Whitespace CL · 80d587d7
      Sergiy Byelozyorov authored 
      TBR=sergiyb@chromium.org

Bug: chromium:773297
Change-Id: Icbff53ed84b72d74f1db9884b3b846b8ff72686b
No-Try: true
No-Presubmit: true
Reviewed-on: https://chromium-review.googlesource.com/992317Reviewed-by: 's avatarSergiy Byelozyorov <sergiyb@chromium.org>
Commit-Queue: Sergiy Byelozyorov <sergiyb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52326}
      80d587d7
    • Ulan Degenbaev's avatar
      [wasm] Fix phantom handle clearing in destructors. · 68be8909
      Ulan Degenbaev authored 
      The destructor of the owner of a phantom handle must clear the phantom
handle first before calling any function that can trigger GC.

Bug: chromium:827806
Change-Id: I20141d0d710c486aec3d92e729d76a53069e16fd
Reviewed-on: https://chromium-review.googlesource.com/992093Reviewed-by: 's avatarMichael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52325}
      68be8909
    • Ivica Bogosavljevic's avatar
      MIPS[64]: Rewrite floating point conditional branches · 9a882c7e
      Ivica Bogosavljevic authored 
      Summary of work done:
* Simplify complicated CompareAndBranch instructions
* Mark BC1EQZ and BC1NEZ as compact branches in simulator
* Remove unneeded nops for BC1EQZ and BC1NEZ
* Block trampolines for delay slot of BC1T and BC1F

Change-Id: I86f3a497e6e9ac73075bb51653c2d4c6ab8454b9
Reviewed-on: https://chromium-review.googlesource.com/986260
Commit-Queue: Ivica Bogosavljevic <ivica.bogosavljevic@mips.com>
Reviewed-by: 's avatarSreten Kovacevic <sreten.kovacevic@mips.com>
Cr-Commit-Position: refs/heads/master@{#52324}
      9a882c7e