gzachos / mars-stack-visualizer

MARS Tool for Visualizing Stack Modification Operations

mars-stack-visualizer

About Mars

MARS is a lightweight interactive development environment (IDE) for programming in MIPS assembly language, intended for educational-level use with Patterson and Hennessy's Computer Organization and Design. Developed by Pete Sanderson ([email protected]) and Kenneth Vollmar ([email protected]).

About this project

The StackVisualizer tool and application allows the user to view in real time the memory modification operations taking place in the stack segment with emphasis to $sp-relative memory accesses. The user can also observe how pushes/pops to/from the stack take place. The address pointed by the stack pointer is displayed in an orange background while the whole word-length data in yellow. Lower addresses have a grey background (given that stack growth takes place from higher to lower addresses). The names of the registers whose contents are stored in the stack, are shown in the "Stored Reg" column. In the "Call Layout" column, the subroutine frame (activation record) layout is displayed, with subroutine names placed on the first address written in the corresponding frame.

Tool Options

• "Display data per byte": When enabled, the bytes of each word (4 Bytes) are displayed separately.
• "Hexadecimal Addresses": Whether memory addresses are formatted in hexadecimal or decimal representation.
• "Hexadecimal Values": Whether memory content is formatted in hexadecimal or decimal representation.
• "Detect jal-equivalent instructions": Whether instruction sequences equivalent to jal should be detected. i.e. la $ra, somelabel immediately followed by j somelabel.

Project Supervisor

• Aris Efthymiou

Project Developers

• George Z. Zachos
• Petros Manousis

License

• Original MARS LICENSE (MIT).
• The Stack Visualizer Tool and Application is also licensed under the MIT LICENSE. For more information see StackVisualizer.java

Source code

The source code was extracted using the following command: jar xf Mars4_5.jar.

Screenshots

Application/Stand-alone program mode:

Creating JAR files

After building this project, script create-jar.sh can be used to create an executable JAR file. It is provided as a replacement to CreateMarsJar.bat included in the original JAR file.

USAGE: ./create-jar.sh [JARNAME[.jar]]