JavaScript JIT Engines timeline
You can view at how all the Just-In-Time (JIT) portion of most major JavaScript engines and how they all related to each other at what version.
JavaScript JIT Engine Timeline
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Firefox Testpoints in Mozilla Unified
This article details the insertion of a common test points into the JavaScript IR/LIR instruction emulator within the JavaScript engine called Spidermonkey.
Identification of Insertion
Since the current JS debugger has left plenty of impressions throughout the
SpiderMonkey code, we searched for the print() aspect of the debugger
that …
JavaScript Interpreter Analysis, Mozilla Unified
This article details the analysis of available datum associated with each bytecode of the JavaScript interpreter in Mozilla Unified repo (that is also being used in Firefox).
Datum
The focus of the bytecode interpreter is the loop (INTERPRETER_LOOP() C macro).
Available structures are given in Interpreter() function:
- Run State machine …
Debugging `jsshell`
This article details how to perfom debugging of the jsshell in Mozilla Unified repository.
Setting Up jsshell Debug
With the js binary built (as described in Firefox JSSHELL, we can then start debugging.
Preparing Work Directory
cd firefox
mkdir test
cd test
DISTDIR=../repo/mozilla-unified/obj-debug-x86_64-pc-linux-gnu/dist/bin/js
ln …Firefox Development
For a buildable JS instrumentation, read in following order
Building `jsshell`
After Mercuralizing the Mozilla Firefox repository, the next focus is to create a MOZCONFIG. MOZCONFIG is a term and also an environment variable that holds various build settings for Mozilla projects (such as Firefox).
MOZCONFIG
we make use of a $HOME/mozconfigs directory to hold our generic but personalized build …
JavaScript Malware Mindset
A mindset on JavaScript Malware
SpiderMonkey Overview
SpiderMonkey is a cool JavaScript utility.