PPT-Syscalls , exceptions, and interrupts, …oh my!

Syscalls exceptions and interrupts oh my Hakim Weatherspoon CS 3410 Computer Science Cornell University Altinbuken Weatherspoon Bala Bracy McKee and Sirer Announcements P4Buffer Overflow is due tomorrow. of the lecture. :. Chandana. :. 1. . Introduction. 2. Example . 3. Definition . 4. Vector table and . Maskable. /. nonmaskable. interrupts . ________________________________________________. Hao. :. Mutual Exclusion with Hardware Support. Thomas Plagemann. With slides from. Otto J. Anshus & Tore Larsen. (University of Tromsø). and Kai Li. (. Princeton University. ). Overview. Interrupts:. and other languages… . So what about Ruby?*. Exceptions are . raised. using the . raise. method of Kernel. The . rescue. . clause is used to handle exceptions. Exceptions are instances of the . Exception. Ganesh Pitchiah. . What’s an MCU ?. Frequency = 8 MHz. Time Period = 1/f. = 0.125 us . Code for Switching LED. int a; . // . Define . variable . Interrupt Handling. David Ferry, Chris Gill. CSE 522S - Advanced Operating Systems. Washington University in St. Louis. St. Louis, MO 63130. 1. Why Interrupts?. Interrupts allow a currently executing process to be preempted. 1. Murphy’s Law. Anything that can go wrong will go wrong. Lesson 14 -- Exceptions. 2. Exceptions. Allow you to deal with the things that go wrong:. Indicate that something unexpected has occurred or been detected. David Ferry, Chris Gill. CSE 422S - Operating Systems Organization. Washington University in St. Louis. St. Louis, MO 63130. 1. Why Interrupts?. Interrupts allow a currently executing process to be preempted. Kristen McGatlin and Dr. Tyler Davis. Why do we like what we like?. While there is more that goes into liking something. Subjectivity. Cognitive processes?. Applied Importance?. Work performance: . preferred environment may cause less cognitive strain/stress = higher productivity. CS1: Java Programming. Colorado State University. Original slides by Daniel Liang. Modified slides by Chris Wilcox. 2. Motivations. When a program runs into a runtime error, the program terminates abnormally. How can you handle the runtime error so that the program can continue to run or terminate gracefully? This is the subject we will introduce in this chapter.. Arvind. Computer Science & Artificial Intelligence Lab.. Massachusetts Institute of Technology. April 30, 2012. L21-. 1. http://csg.csail.mit.edu/6.S078. Interrupts. :. altering the normal flow of control. Fall 2014. Hadi Esmaeilzadeh. hadi@cc.gatech.edu. . Georgia Institute of Technology. Some slides adopted from Prof. . Milos . Prvulovic. Better Devices. Now SW, KEY can be read. Problem: several instructions needed to detect change. Academic ResourceCenterOverviewExceptions definition and overviewTry/Catch BlocksFinally BlocksOverall ExampleChecked and Unchecked ExceptionsSummaryWhat is an exceptionIn its most general sense an ex x0000x0000StroustrupC exceptions and alternativesP1947x0000x00002 x/MCIxD 0 x/MCIxD 0 HistoryThe origins of exception handling lie in the problems experienced managing a variety of errorhandling appr disable interrupts // Must finish put on queue of threads waiting for lock set guard to 0 call switch enable interrupts else value BUSY guard 0 LockRelease Why disable interrupts N