When reading malformed input, the length of variable-length types can be very large. Computing operand length with this and adding it to PC will overflow and screw up decode.

This patch switches to unsigned int for arity and lengths, terminates loop analysis on error, adds overflow checking to BranchTableOperand, and adds a unit test.

Review-Url: https://codereview.chromium.org/2052623003
Cr-Commit-Position: refs/heads/master@{#37301}

    Constantpool register is being used with no frame, and
    therefore it points to its parent stub's constantpool
    causing segfault.
    Disable constantpool before CallStub if frame not set.

R=joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, mbrandy@us.ibm.com

BUG=
LOG=N

Review-Url: https://codereview.chromium.org/2106493002
Cr-Commit-Position: refs/heads/master@{#37300}

Revert of Refactor CreateApiFunction (patchset #2 id:20001 of https://codereview.chromium.org/2095953002/ )

Reason for revert:
[Sheriff] Changes a layout test. Please rebase upstream if intended:
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/builds/7742

Original issue's description:
> Refactor CreateApiFunction
>
> BUG=
>
> Committed: https://crrev.com/705574970f3899a6eda0c61130c8c31693df4039
> Cr-Commit-Position: refs/heads/master@{#37290}

TBR=jochen@chromium.org,verwaest@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=

Review-Url: https://codereview.chromium.org/2099983004
Cr-Commit-Position: refs/heads/master@{#37299}

Removes failure expectation for observer-expectations layout test.

BUG=v8:4280,v8:5096
LOG=N

Review-Url: https://codereview.chromium.org/2094353002
Cr-Commit-Position: refs/heads/master@{#37298}

Replaces ArchDefault method with Crankshaft and Turbofan getters.
Eliminates IsAllocated method on Register, FloatRegister, DoubleRegister.
Eliminates ToString method too.
Changes call sites to access appropriate arch default RegisterConfiguration.

LOG=N
BUG=

Review-Url: https://codereview.chromium.org/2092413002
Cr-Commit-Position: refs/heads/master@{#37297}

the .eh_frame format as part of the jitdump generated when
FLAG_perf_prof is enabled. The final goal is allowing precise unwinding
of callchains that include JITted code when profiling V8 using perf.

Unwinding information is stored in the body of code objects after the
code itself, prefixed with its length and aligned to a 8-byte boundary.
A boolean flag in the header signals its presence, resulting in zero
memory overhead when the generation of unwinding info is disabled or
no such information was attached to the code object.

A new jitdump record type (with id 4) is introduced for specifying
optional unwinding information for code load records. The EhFrameHdr
struct is also introduced, together with a constructor to initialise it
from the associated code object.

At this stage no unwinding information is written to the jitdump, but
the infrastructure for doing so is ready in place.

BUG=v8:4899
LOG=N

Review-Url: https://codereview.chromium.org/1993653003
Cr-Commit-Position: refs/heads/master@{#37296}

BUG=

Review-Url: https://codereview.chromium.org/2069933003
Cr-Commit-Position: refs/heads/master@{#37295}

This adds a missing lazy bailout point when defining data properties
with computed property names in object literals. The runtime call to
Runtime::kDefineDataPropertyInLiteral can trigger deopts. The necessary
bailout ID already exists and is now properly used.

R=jarin@chromium.org
TEST=mjsunit/regress/regress-crbug-621816
BUG=chromium:621816

Review-Url: https://codereview.chromium.org/2099133003
Cr-Commit-Position: refs/heads/master@{#37294}

Instead of a JS implementation that calls C++ runtime functions, migrate String.fromCodePoint() to C++.

BUG=v8:5049

Review-Url: https://codereview.chromium.org/2038563003
Cr-Commit-Position: refs/heads/master@{#37293}

R=yangguo@chromium.org,danno@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2094293002
Cr-Commit-Position: refs/heads/master@{#37292}

This is a building block for GetPropertyStub. It supports querying fast,
slow and global objects without native accessors and interceptors.

BUG=v8:4911
LOG=Y

Review-Url: https://codereview.chromium.org/2079823002
Cr-Commit-Position: refs/heads/master@{#37291}

BUG=

Review-Url: https://codereview.chromium.org/2095953002
Cr-Commit-Position: refs/heads/master@{#37290}

Proxy objects need special treatment in toString(). Usually, we use the
@@toStringTag, if it is set, otherwise we determine the result of toString()
by checking IsArray() and other internal slots. According to
ES2017 19.1.3.6, IsArray() and the internal slots  must be checked first,
then get(@@toStringTag). The result of IsArray() and internal slots is discarded if
@@toStringTag is set. For proxy
objects, we must obey this order, because get() can have side-effects, i.e.,
revoke the proxy. For all other objects, we can skip the check of the
internal slots, if @@toStringTag is set.

BUG=

CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel

Review-Url: https://codereview.chromium.org/2090773006
Cr-Commit-Position: refs/heads/master@{#37289}

- Add a const bool kSimpleFPAliasing variable for each platform so it's
easier for the compiler to eliminate dead code.
- Modify RegisterAllocator to use it.

LOG=N
BUG=v8:4124

Review-Url: https://codereview.chromium.org/2101473002
Cr-Commit-Position: refs/heads/master@{#37288}

This adds generate-bytecode-expectations and parser_shell.

BUG=chromium:474921
NOTRY=true

Review-Url: https://codereview.chromium.org/2102483002
Cr-Commit-Position: refs/heads/master@{#37287}

This superseeds all-can-read/all-can-write properties

BUG=chromium:618305
R=verwaest@chromium.org

Review-Url: https://codereview.chromium.org/2087823002
Cr-Commit-Position: refs/heads/master@{#37286}

Removes OperandConverter::*Float32* and *Float64* methods.

LOG=N
BUG=v8:4124

Review-Url: https://codereview.chromium.org/2091973002
Cr-Commit-Position: refs/heads/master@{#37285}

BUG=chromium:581412
LOG=N
R=jochen@chromium.org

Review-Url: https://codereview.chromium.org/2094753002
Cr-Commit-Position: refs/heads/master@{#37284}

We can check if the instance type of an object is JS_PROMISE_TYPE to determine if it is a promise rather than test whether the property promise_state_symbol is present.

BUG=
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel

Review-Url: https://codereview.chromium.org/2091243002
Cr-Commit-Position: refs/heads/master@{#37283}

  port f5b83dec (r37061)

  original commit message:
  As a first step towards showing builtin frames in stack traces, we will now
  push target and new target unconditionally.

  Since the various specializations of BuiltinArguments are made redundant by
  this change, we can remove them and all related code.

BUG=

Review-Url: https://codereview.chromium.org/2095323002
Cr-Commit-Position: refs/heads/master@{#37282}

R=littledan@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2088813002
Cr-Commit-Position: refs/heads/master@{#37281}

R=adamk@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2081163002
Cr-Commit-Position: refs/heads/master@{#37280}

Replace explicit Object::IsErrorObject() and v8::IsNativeError() with macro generated functions Object::IsJSError() and HeapObject::IsJSError().

BUG=

Committed: https://crrev.com/90e4fd136387ca7271d8ea87f4fc667e4f55063b
Cr-Commit-Position: refs/heads/master@{#37244}
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel

Review-Url: https://codereview.chromium.org/2090333002
Cr-Commit-Position: refs/heads/master@{#37279}

The global object can be loaded from the native context and the name can be loaded in the type feedback metadata.

BUG=chromium:576312

Review-Url: https://codereview.chromium.org/2096653003
Cr-Commit-Position: refs/heads/master@{#37278}

  port 4d4eb611 (r37058)

  original commit message:

BUG=

Review-Url: https://codereview.chromium.org/2097323002
Cr-Commit-Position: refs/heads/master@{#37277}

BUG=623021

Review-Url: https://codereview.chromium.org/2099923002
Cr-Commit-Position: refs/heads/master@{#37276}

  port 198e09de (r37053)

  original commit message:
  Construct a BUILTIN frame before throwing an exception from runtime.

BUG=

Review-Url: https://codereview.chromium.org/2094223002
Cr-Commit-Position: refs/heads/master@{#37275}

Fix after:
https://codereview.chromium.org/2060743002/
https://codereview.chromium.org/2086653003/

BUG=v8:5086, v8:5092, v8:4124
TBR=bmeurer@chromium.org, yangguo@chromium.org,  bbudge@chromium.org

NOTRY=true

Review-Url: https://codereview.chromium.org/2095313002
Cr-Commit-Position: refs/heads/master@{#37274}

If we know that a constant can be represented as word32, then we don't
need to insert a checked conversion, but just change the constant
appropriately.

R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2100063002
Cr-Commit-Position: refs/heads/master@{#37273}

See https://codereview.chromium.org/2076483002 for a lengthy reasoning.
The two mysterious files called out there were in boringssl and nacl,
so for v8 this should be a complete no-op.

BUG=chromium:592745

Review-Url: https://codereview.chromium.org/2099843002
Cr-Commit-Position: refs/heads/master@{#37272}

BUG=chromium:611688
LOG=N
R=machenbach@chromium.org

Review-Url: https://codereview.chromium.org/2098443002
Cr-Commit-Position: refs/heads/master@{#37271}

  port f47b9e98 (r37051)

  original commit message:
  This adds a new BUILTIN frame type, which supports variable number of
  arguments for builtins implemented in hand-written native code (we will
  extend this mechanism to TurboFan builtins at some point). Convert the
  Math.max and Math.min builtins to construct a BUILTIN frame if required.

  This does not yet work for C++ builtins, but that'll be the next step.

BUG=

Review-Url: https://codereview.chromium.org/2096283003
Cr-Commit-Position: refs/heads/master@{#37270}

  port d5f2ac5e (r37047)

  original commit message:
  Import base::ieee754::exp() from FreeBSD msun and introduce a Float64Exp
  TurboFan operator based on that, similar to what we do for Float64Log.
  Rewrite Math.exp() as TurboFan builtin and use that operator to also
  inline Math.exp() into optimized TurboFan functions.

BUG=

Review-Url: https://codereview.chromium.org/2096283002
Cr-Commit-Position: refs/heads/master@{#37269}

  port d9bf520a (r37035)

  original commit message:

BUG=

Review-Url: https://codereview.chromium.org/2100023002
Cr-Commit-Position: refs/heads/master@{#37268}

  port c5e3c9bf (r37011)

  original commit message:
  Only Intel needed changes, arm and mips work as expected.

BUG=

Review-Url: https://codereview.chromium.org/2094143003
Cr-Commit-Position: refs/heads/master@{#37267}

  port 2d1f977c (r36978)

  original commit message:
  Support for relocatable globals, to facilitate compilation before
  instantiation.

BUG=

Review-Url: https://codereview.chromium.org/2096273002
Cr-Commit-Position: refs/heads/master@{#37266}

  port 6470ddad (r36950)

  original commit message:
  This introduces SilenceNaN operator, which makes sure that we only
  store quiet NaNs into holey arrays. We omit the NaN silencing code
  at instruction selection time if the input is an operation that
  cannot possibly produce signalling NaNs.

BUG=

Review-Url: https://codereview.chromium.org/2099143002
Cr-Commit-Position: refs/heads/master@{#37265}

Rolling v8/build to 95bb77009ecdeaa992b031b947142fbf7da57ed6

Rolling v8/tools/mb to 62e2d060db3b06208f5d6558db03efd140ecd180

TBR=machenbach@chromium.org,vogelheim@chromium.org,hablich@chromium.org

Review-Url: https://codereview.chromium.org/2098293002
Cr-Commit-Position: refs/heads/master@{#37264}

  port e95cfafb (r36917)

  original commit message:
  This fixes FastNewStrictArgumentsStub and FastNewRestParameterStub to no
  longer assume that the strict arguments object being allocated will fit
  into new-space. The case where said object needs to move to large object
  space is now handled in the runtime.

BUG=

Review-Url: https://codereview.chromium.org/2100003002
Cr-Commit-Position: refs/heads/master@{#37263}

  port 89d8c57b (r36916)

  original commit message:
  Import base::ieee754::atan() and base::ieee754::atan2() from fdlibm and
  introduce Float64Atan and Float64Atan2 TurboFan operators based on those,
  similar to what we already did for Float64Log and Float64Log1p. Rewrite
  Math.atan() and Math.atan2() as TurboFan builtin and use the operators
  to also inline Math.atan() and Math.atan2() into optimized TurboFan functions.

BUG=

Review-Url: https://codereview.chromium.org/2093423003
Cr-Commit-Position: refs/heads/master@{#37262}