Release Notes

ChakraCore 1.4

v1.4.0

ChakraCore 1.4.0 includes cross-platform JIT support and experimental WebAssembly support along with other language, performance and JSRT updates. See notable changes below.

• ChakraCore JIT on Linux and MacOS #1591 #1744
• Enhance Time Travel Debugging support
• Enable Async Functions by default #1691
• Enable SharedArrayBuffer under experimental flag #1759
• Enable WebAssembly browser preview support under experimental flag #1985
• Update JSRT String APIs (experimental) #1830
• Memory reduction through function body redeferral #1585
• Add out-of-process JIT support in Microsoft Edge #1561

ChakraCore 1.3

v1.3.1

This patch release of ChakraCore 1.3 includes the following security fixes:

• Change to address CVE-2016-7207 #1979
• All fixes included in v1.2.2

v1.3.0

Release 1.3.0 includes experimental support on x64 Linux/OSX, experimental JSRT debugging APIs, and other language and performance updates. See notable changes below.

Cross-platform

• ChakraCore interpreter and runtime on x64 Linux (still working on JIT or concurrent/partial GC)
• ChakraCore interpreter and runtime on x64 OSX (still working on JIT or concurrent/partial GC) #1134

Language

• Enable Symbol.toStringTag by default #1383
• Enable String.prototype.padStart and String.prototype.padEnd by default #1257
• Enable Symbol.prototype[@@toPrimitive] and Date.prototype[@@toPrimitive] under experimental flag #1319
• Enable Symbol.isConcatSpreadable under experimental flag #1198
• Enable Symbol.hasInstance under experimental flag #1063

Performance

• Optimize creation of Heap arguments object (91e0e91)
• Add fastpath for when Object.hasOwnProperty returns true #1449
• Enable script function inlining in jitted loop bodies #1182

JSRT

• JSRT Debugging APIs (experimental) #926
• JSRT Module API (experimental) #1254

Test

• Introduce C++ unit testing mechanism using Catch #1224

ChakraCore 1.2

v1.2.2

This patch release of ChakraCore 1.2 includes the following security fixes:

• Change to address CVE-2016-7200, CVE-2016-7201, CVE-2016-720, CVE-2016-7203, CVE-2016-7208, CVE-2016-7240, CVE-2016-7241, CVE-2016-7242, CVE-2016-7243 #1942

v1.2.1

This patch release of ChakraCore 1.2 includes the following security fixes:

• Fixed Address deref issue #1530
• Combined fixes for CVE-2016-3350, CVE-2016-3377 and a defense in depth change in the CustomHeap (24c4d7d)
• Changes addressing CVE_2016-3382, CVE-2016-3385, CVE-2016-3386, CVE-2016-3389, CVE-2016-3390, CVE-2016-7189, and a mitigation of a CFG bypass. (f05c42e)

v1.2.0

• Turn support for ES2015 Destructuring Assignment on by default
• Turn support for ES2015 Default Parameters on by default
• Turn support for the proposed ECMAScript Exponentiation Operator on by default
• Enable proposed ECMAScript Async Functions behind an experimental flag
• Enable ES2015 Modules behind an experimental flag
• Includes multiple changes to reduce memory consumption