The ExternalPointerTags are assumed to be compile-time constants in most
cases, so turning them into template parameters enforces that. As
decisions such as whether to use the per-isolate or the shared external
pointer table are encoded into the tag values, forcing those to be
compile-time constants guarantees that the compiler will be able to
inline the correct logic when accessing an external pointer.

With this, there are now two (high-level) ways of accessing external pointer fields from C++: the Read/WriteExternalPointerField methods
which require the ExternalPointerTag to be a template parameter, and the
ExternalPointerSlot class which takes the tag as an argument. The latter
is for example used for snapshot deserialization and by the garbage
collector (more generally, by the ObjectVisitor::VisitExternalPointer
method), where the tag is not a compile-time constant.

Finally, this CL also introduces a new ExternalPointerHandle type which
represents the (opaque) on-heap representation of a reference to an
entry in an ExternalPointerTable when sandboxing is enabled. Making this
its own type makes the code a bit more readable.

Bug: v8:10391
Change-Id: I867b8ce41d15d485f1dc66786f233c710c56afcb
Cq-Include-Trybots: luci.v8.try:v8_linux64_heap_sandbox_dbg_ng,v8_linux_arm64_sim_heap_sandbox_dbg_ng
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3720641Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Samuel Groß <saelo@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81402}

 is before a new nesting loop

This is probably a JumpLoop to loop nesting level 0 getting removed if
it's dead code. Add before a new nesting loop to break condition of
removing OSR code cache if deopt at inside of loop.

Bug: chromium:1330883
Change-Id: I010e3ca2adaafae8dcc606c49860ca0a70442952
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3713093Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Tao Pan <tao.pan@intel.com>
Cr-Commit-Position: refs/heads/main@{#81401}

- Change definition to macro-style to be able to assert that masks/tags
  are correct.
- Split definition of shared/non-shared tags.
- Use bit 62 (for now) to indicate tags are shared.

Bug: v8:10391
Change-Id: Ia3ad6294cf5e6fd0c4dc2a328f976f295da762f5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3726009Reviewed-by: Samuel Groß <saelo@chromium.org>
Commit-Queue: Patrick Thier <pthier@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81400}

Change-Id: I6f2e5fa04eba1b3c97212be945b776ebc2be5915
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3726210Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81399}

Parameter of class UnoptimizedFrame and JavaScriptFrame was removed.

Change-Id: I37c43ff491f039820f40d60ed9ada43fd59e7c05
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3725613Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Tao Pan <tao.pan@intel.com>
Cr-Commit-Position: refs/heads/main@{#81398}

Since v8config.h already defines the related logic for OS detection, it
should be fine to move arch detection also there. The CL also makes
Oilpan use one of those macros to avoid discrepancy between the compiler
and custom macros (the discrepancy occurs for host tools, e.g. mksnapshot).

Bug: chromium:1336222
Change-Id: Ibe7d9116d27c3e816f4778fd4c149d8142d0f7a9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3726208
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81397}

... value count.

Bug: v8:11525
Change-Id: Iedc424a665dc412c278cf98457c169ffe98bb236
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3721178Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: 王澳 <wangao.james@bytedance.com>
Cr-Commit-Position: refs/heads/main@{#81396}

... objects/dictionary-unittest.

Bug: v8:12781
Change-Id: I7faeb9fedf7857b25a85bf32f14323ba3da207c0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3706968Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: 王澳 <wangao.james@bytedance.com>
Cr-Commit-Position: refs/heads/main@{#81395}

... base/atomicops-unittest.

Bug: v8:12781
Change-Id: Iac23576cca9c50c2281a2d7e781dde4750e54c03
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3711344Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: 王澳 <wangao.james@bytedance.com>
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Rename:
- array.init(_static) -> array.new_fixed(_static)
- array.init_from_data(_static) -> array.new_data(_static)
- array.init_from_elem_static -> array.new_elem_static
- (Wasm)ArrayInitFromSegment -> (Wasm)ArrayNewSegment

Bug: v8:7748
Change-Id: I5ea314d653dd0e9f7f1f556469794d880934e01b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3726207Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81393}

... api/access-check-unittest.

Bug: v8:12781
Change-Id: I25025af204cdeaba1ba2b690cbaf5ba93e59441f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3725447
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Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81392}

... unittests/heap/persistent-handles-unittest.

Bug: v8:12781
Change-Id: I8d7abff3a34e11c920053c71a1a2c4b9c84235d9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3724791
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... objects/global-object-unittest.

Bug: v8:12781
Change-Id: I40a8d00301531e7d1a6dce90e1226c4568c8d72c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3713521
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... /codegen/pointer-auth-arm64-unittest.

Bug: v8:12781
Change-Id: Ibce77b62650c7a5f84b62282861297b9d4b2e591
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3724790Reviewed-by: Leszek Swirski <leszeks@chromium.org>
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And add a test to ensure we've caught them all and won't
forget any others in the future.

Change-Id: I9bed83ada1c8991eaf08af4b34d4ccda7dc0e600
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3724788
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The following flag combinations run into a CHECK in d8:
('--assert-types', '--stress-concurrent-inlining')
('--assert-types', '--stress-concurrent-inlining-attach-code')

All flags can be passed as clusterfuzz trials on d8 fuzzers and lead
to poor fuzzing outcomes. This lowers their probability as a
mitigation until a better solution is found.

No-Try: true
Bug: chromium:1336577
Change-Id: I63747bb0a466c01d2789fc76cb9232f7afe720f0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3721382
Auto-Submit: Michael Achenbach <machenbach@chromium.org>
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- Use the lowered 32-bit signature when linking the inlined and caller
  graphs.
- Tolerate non-projection uses of Call nodes when linking the graphs.
  These can be left over by Int64Lowering.
- Drive-by: Inline really small functions even if their call count is
  low.

Bug: v8:12166
Change-Id: I5b472d3f617f2f23820a5d142102c0a6c5c769dc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3720715Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
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- Moved graph-phase.ts to graph-phase folder
- Refactored selection.ts, selection-broker.ts, selection-handler.ts, source-resolver.ts

Bug: v8:7327
Change-Id: I922c8730f89c53a73a55414378ac1e29a6397a80
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3714945Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Commit-Queue: Danylo Boiko <danielboyko02@gmail.com>
Cr-Commit-Position: refs/heads/main@{#81385}

It is no longer necessary to postpone the allocation of backing stores
to avoid triggering GC. As such, the logic around ArrayBuffer
deserialization can be simplified.

Bug: v8:10391, v8:11111
Change-Id: I7410392a6e658cd4be77e2192483c6d412b63412
Cq-Include-Trybots: luci.v8.try:v8_linux64_heap_sandbox_dbg_ng,v8_linux_arm64_sim_heap_sandbox_dbg_ng
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No-Try: true
Bug: v8:12999
Change-Id: I82b1d8d3dc9ab62341f581440665964652603b92
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3720718
Auto-Submit: Michael Achenbach <machenbach@chromium.org>
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Now you can use 3-letter alias for all modes: rel, opt, dbg
Example: gm.py x64.opt.d8

No-Try: True
Change-Id: I825ebbf4cc1c509599f4fd2ac5aa0ac6fab998c0
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In this part: entries, keys, values

Bug: v8:11111
Change-Id: I2a87be21348626e34f887c71026dba1120adb7d6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3723504Reviewed-by: Shu-yu Guo <syg@chromium.org>
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The waiter queue node of JS Atomics.Mutex is now stored in the shared
external pointer table.

Bug: v8:12547
Change-Id: I2f4ce1c705d5e710b49872942702f60edf6c4043
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3721696Reviewed-by: Shu-yu Guo <syg@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Patrick Thier <pthier@chromium.org>
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Instead of creating smaller sandboxes when the allocation of the virtual
address space reservation fails, we now create partially-reserved
sandboxes and halve the reservation size until the initialization
succeeds. That way, the unreserved part of the sandbox can still be used
for allocating objects.

Bug: v8:10391
Change-Id: I89a7790ffcda87ab71cc7b7f1101c0a1c3c62829
Cq-Include-Trybots: luci.v8.try:v8_linux64_heap_sandbox_dbg_ng,v8_linux_arm64_sim_heap_sandbox_dbg_ng
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Previously, only root marking performed during the final pause
was accounted for in the tracing data.

This CL enables tracing of the initial root marking step of MajorMC.

Change-Id: I4aa8a52144d81a12e43a481518acbab118978992
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3724793
Commit-Queue: Leon Bettscheider <bettscheider@google.com>
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Utf8Decoder used to use unibrow::Utf8::ValueOfIncremental, which had a
fast path to avoid the decoder for bytes less than 0x80 in the start
state.  We had to switch away from ValueOfIncremental but it's probably
a good idea to keep the fast path.

Bug: v8:12868
Change-Id: I7d83d67f2c13a1c4f026dde04ef0a69b7de47dc3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3723498
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Quite embarassingly, the test that the WTF-8 decoder rejects surrogate
pairs was broken: the trailing surrogate was invalid.  (The range of the
second byte for leading surrogates is [A0,AF], and for trailing is
[B0,BF]).  Of course the actual functionality was broken, because the
code that detected surrogate pairs called IsSurrogatePair with swapped
arguments.

Bug: v8:12868
Change-Id: Icab5e2e4e200afb3d34f478ab4f98b739ada5645
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3723497Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
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Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/2089295..da9fb2e

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Change-Id: I97069cb241823a1cd7841500c4c8fd546174ad88
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3725651
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Rolling v8/third_party/fuchsia-sdk/sdk: version:8.20220625.1.1..version:8.20220626.2.1

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Change-Id: I1062c51092c5b726eda8c676da482b2c40a914ca
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This CL adds control-path type-tracking for wasm-gc nodes in the
WasmGCOperatorReducer. Nodes now use the types assigned to their
argument nodes, as well as the additional information tracked along
control paths.

Drive-by: Add support for multiple instances of the same node to
appear in control-path-state.

Bug: v8:7748
Change-Id: I73e8f84595609b3a5fb61a2bffeb973182d17676
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3717994Reviewed-by: Maya Lekova <mslekova@chromium.org>
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Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/21685e0..2089295

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Change-Id: Icc99863c6ef4e1628f663f1fbe030f05e94e1214
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Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/c7d258f..17a97ab

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Rolling v8/third_party/icu: https://chromium.googlesource.com/chromium/deps/icu/+log/1da9170..50ec7b3

CherryPick PR2117 to avoid assert on invalid state (Frank Tang)
https://chromium.googlesource.com/chromium/deps/icu/+/50ec7b3

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Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/3236751..c7d258f

Rolling v8/third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/d9a9c40..ebccac7

Rolling v8/third_party/fuchsia-sdk/sdk: version:8.20220623.3.1..version:8.20220624.2.1

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https://chromium.googlesource.com/external/github.com/tc39/test262/+log/b1f49b5c46..b458b9f0c2

Bug: v8:7834
Change-Id: I6191d4533ae2046b3b132b62397bcefa597320f6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3724328
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In this part: find, findIndex, findLast, findLastIndex

Drive-by: add missing tests for A.p.fill + detaching.

Bug: v8:11111
Change-Id: I7583ccce16bf294cc5ab6adbb7ce1f019a11ad18
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3721315Reviewed-by: Shu-yu Guo <syg@chromium.org>
Auto-Submit: Marja Hölttä <marja@chromium.org>
Commit-Queue: Shu-yu Guo <syg@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81366}

Bug: chromium:1339356, chromium:1338687
Change-Id: Ied308cc98c19e3b1402ffff6b2e8519d1e33fda2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3721468
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Drive-by: add unscopable test for Array.prototype.toReversed.

Bug: v8:12764
Change-Id: I9d7dd8d4eae6d23811382b6795c2c6ff7f76be72
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3717552Reviewed-by: Marja Hölttä <marja@chromium.org>
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Cr-Commit-Position: refs/heads/main@{#81364}

This reverts commit c4301c04.

Reason for revert: https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Linux64%20GC%20Stress%20-%20custom%20snapshot/42568/overview

Original change's description:
> [maglev] Add internalized string compare fast-path
>
> - Rename TryBuildCompareOperationBranch to TryBuildCompareOperation
> - Add CheckedInternalizedString conversion Node that checks for string
>   inputs and extracts internalised Strings from ThinStrings
> - Add BranchIfReferenceCompare Node
> - Add runtime functions to create internalised and thin Strings
> - Add deopt check to test/mjsunit/maglev/int32-branch.js
>
> Bug: v8:7700
> Change-Id: I0073c24fad9e3231c985153cd27b0b8fe6ee56f0
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3664498
> Reviewed-by: Leszek Swirski <leszeks@chromium.org>
> Commit-Queue: Camillo Bruni <cbruni@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#81361}

Bug: v8:7700
Change-Id: Id4e18f42a5b1f0d6909b0a017ae8e289ae8c8614
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3723520
Owners-Override: Shu-yu Guo <syg@chromium.org>
Auto-Submit: Shu-yu Guo <syg@chromium.org>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#81363}