Lab 3 - IDA

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<strong>Lab</strong> 4: Create and Remove • Creating and removing of files must not lead to destructive consequences to the file system • Create and remove are writing operations on the directories (filesys/directory[.h|.c]) • To make your life easier, reading & writing operations on the directory can be synchronized by a single lock. 38
<strong>Lab</strong> 4: Final Tests • For testing your readers-writers algorithm, we provide the following user programs: pfs.c, pfs_reader.c, pfs_writer.c • These programs emulate several readers and writers accessing the same file. – 2 Writers: repeatedly fill file.1 with a letter (new letter each time). – 3 Readers: repeatedly read file.1 and check that all letters are the same. – If the readers see that not all the letters are the same they are seeing a half finished write; fail. 39
Page 1 and 2: TDDB68 2011 Lesson 2 Pintos Assignm
Page 3 and 4: Instead of Motivation • Some of y
Page 5 and 6: Lab 3: overview • Part A - Multip
Page 7 and 8: Exec & wait example: src/examples/s
Page 9 and 10: Part A Lab 3: Exec • pid_t exec (
Page 11 and 12: Lab 3: Exec Starting the child Pare
Page 13 and 14: Lab 3: Situations with Wait • Chi
Page 15 and 16: Lab 3: Situations with Wait • Chi
Page 17 and 18: Reference counting “poor man's ga
Page 19 and 20: Lab 3: Part B • Sometimes we want
Page 21 and 22: Lab 3: Part B • Every time you do
Page 23 and 24: Lab 3 (B): Program arguments • ST
Page 25 and 26: Address Name Data Type 0xbffffffd a
Page 27 and 28: Lab 3 : Part C • Part C: Making t
Page 29 and 30: Bad string argument • User progra
Page 31 and 32: Lab 3 : Pointer paranoia Memory val
Page 33 and 34: Lab 4: General Description • Lab
Page 35 and 36: Lab 4: Files (2) • devices/disk.[
Page 37: Lab 4: Additional System Calls •

Lab 3 - IDA

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