Debugging by Thinking: A Multidisciplinary Approach (HP Technologies)

Debugging by Thinking: A Multidisciplinary Approach (HP Technologies)

Language: English

Pages: 600

ISBN: 1555583075

Format: PDF / Kindle (mobi) / ePub


Debugging by Thinking: A Multi-Disciplinary Approach is the first book to apply the wisdom of six disciplines―logic, mathematics, psychology, safety analysis, computer science, and engineering―to the problem of debugging. It uses the methods of literary detectives such as Sherlock Holmes, the techniques of mathematical problem solving, the results of research into the cognitive psychology of human error, the root cause analyses of safety experts, the compiler analyses of computer science, and the processes of modern engineering to define a systematic approach to identifying and correcting software errors.

* Language Independent Methods: Examples are given in Java and C++
* Complete source code shows actual bugs, rather than contrived examples
* Examples are accessible with no more knowledge than a course in Data Structures and Algorithms requires
* A "thought process diary" shows how the author actually resolved the problems as they occurred

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drawbacks. Event-based data collection is precise, but can take longer. 2.5 The methods of Sherlock Holmes 0 . 4. 27 Sampling-based data collection is an approximation, but can take less time. Trace-based data collection is complete, but can use lots of storage. Reductionist data collection loses details, but uses much less storage. Another way to look at point of view is the difference between synchronic and diachronic approaches. A synchronic ("with time") approach takes a snapshot of

show a logical chain of events that could lead to the symptom of the defect. 9 Draw a series of diagrams of a data structure showing how it could come into its current erroneous state. Draw a tree showing the control-flow decisions that could result in the undesired behavior. 3.4 3.4 Review 47 Review An alibi has three components: time, place, and corroboration. A program that has side effects has no alibi for the time a problem occurred or the place it occurred. The debugging equivalent of

^ 804bb20 1 (804ba80) L 0 R 0 P 804baa0 S 0 ^ 804bb00 2 (804baa0) L 0 R 0 P 804bac0 S 804ba80 4(804bae0) Case Study I L 0 R 804bac0 3 (804bac0) P 0 S 804bb00 L 0 R 0 P 804ba80 ^ 804bb00 ^ 804bb20 S 804baa0 ^ 804bae0 $3 = v o i d remove 6 We carefully inspect the pointers in the output. The first and second displays are correct. In the third display, the node with key value of "3" has a predecessor pointer of "804ba80," even though it is the leftmost node at that level and has

test are shown as follows. In the interest of conserving space, we show only the results from the first six tests. test 1:8 8 6 I Chapter _5 5. I I48 4 1 remove 8 remove 7 remove 6 remove 5 remove 4 8 7 6 5 4 test 2 : 9 23 13 11 3 19 5 17 7 2 remove 23 remove 19 remove 1 7 remove 1 3 remove 11 remove 7 23 1 9 17 1 3 11 7 test 3 : 16 32 28 20 4 6 22 8 10 30 24 12 Case Study I 5.1 Case Study I 149 14 26 16 18 2 remove 32 remove 30 remove 28 remove 26 remove 24

_root->getRight()->setParent(_last)- _last->setLeft(_root->getLeft()); _last->setRight(_root->getRight()); l a s t - > s e t P a r e n t (0 ) ; l a s t - > s e t S u c c (0 ) ; l a s t - > s e t P r e d (0 ) 9 _ l a s t - > s e t I D (_root->getID () ) ; _root= if ( penult != 0 ) { _last: penult ; _last: _frontier; } else } _last; { Case Study I 5.1 Case Study I 173 movedown(); } else N { last= 0; root= 0; frontier= } // u n l i n k 0; removed node->setLeft (0 ) ;

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