Bug 1672862 - Part 1: Change TypedArray indexed properties to report …

…as configurable. r=tcampbell

Implements the changes from <tc39/ecma262#2164> and
<tc39/ecma262#2210> for [[GetOwnProperty]]. Part 3
will update [[DefineOwnProperty]] and part 5 updates [[Set]].

A side-effect of this change is that non-extensible, non-empty TypedArrays are
no longer considered as sealed by `Object.isSealed()`.

A later patch in this series will update test262 to enable more currently
skipped TypedArray tests.

Differential Revision: https://phabricator.services.mozilla.com/D99380

UltraBlame original commit: efd88e38955fc4722c6a882c175fdb48d6ff9e10

js/src/tests/non262/TypedArray/object-defineproperty.js

@@ -336,7 +336,7 @@ assertEq
 desc
 .
 configurable
-false
+true
 )
 ;
 assertEq

js/src/tests/non262/TypedArray/seal-and-freeze.js

@@ -63,6 +63,23 @@ array
 true
 )
 ;
+/
+/
+Non
+-
+empty
+typed
+arrays
+can
+never
+be
+sealed
+because
+the
+elements
+stay
+configurable
+.
 array
 =
 new
@@ -120,7 +137,7 @@ isSealed
 (
 array
 )
-true
+false
 )
 ;
 array
@@ -154,7 +171,7 @@ isSealed
 (
 array
 )
-true
+false
 )
 ;
 assertThrowsInstanceOf
@@ -214,7 +231,7 @@ typed
 -
 array
 is
-trvially
+trivially
 frozen
 var
 array

js/src/tests/non262/TypedArray/test-integrity-level.js

@@ -80,7 +80,7 @@ Non
 empty
 typed
 arrays
-can
+cannot
 be
 sealed
 .
@@ -130,7 +130,7 @@ isSealed
 (
 ta
 )
-true
+false
 )
 ;
 assertEq
@@ -270,7 +270,7 @@ isSealed
 (
 ta
 )
-true
+false
 )
 ;
 assertEq
@@ -360,11 +360,9 @@ empty
 typed
 arrays
 are
+neither
 sealed
-but
-aren
-'
-t
+nor
 frozen
 .
 for
@@ -413,7 +411,7 @@ isSealed
 (
 ta
 )
-true
+false
 )
 ;
 assertEq

js/src/vm/JSObject.cpp

@@ -4369,24 +4369,25 @@ Typed
 array
 elements
 are
-non
--
 configurable
 writable
 properties
 so
-/
-/
 if
 any
+/
+/
 elements
 are
 present
 the
 typed
 array
-cannot
+can
+neither
 be
+sealed
+nor
 frozen
 .
 if
@@ -4421,15 +4422,6 @@ get
 )
 >
 0
-&
-&
-level
-=
-=
-IntegrityLevel
-:
-:
-Frozen
 )
 {
 *

js/src/vm/NativeObject.cpp

@@ -19744,6 +19744,37 @@ failCantDelete
 )
 ;
 }
+/
+/
+Typed
+array
+elements
+are
+configurable
+but
+can
+'
+t
+be
+deleted
+.
+if
+(
+prop
+.
+isTypedArrayElement
+(
+)
+)
+{
+return
+result
+.
+failCantDelete
+(
+)
+;
+}
 if
 (
 !
@@ -19783,26 +19814,6 @@ true
 }
 /
 /
-Typed
-array
-elements
-are
-non
--
-configurable
-.
-MOZ_ASSERT
-(
-!
-prop
-.
-isTypedArrayElement
-(
-)
-)
-;
-/
-/
 Step
 5
 .

js/src/vm/Shape-inl.h

@@ -1873,8 +1873,6 @@ isTypedArrayElement
 {
 return
 JSPROP_ENUMERATE
-|
-JSPROP_PERMANENT
 ;
 }
 return