A CIL Tutorial - Department of Computer Science - ETH Zürich
A CIL Tutorial - Department of Computer Science - ETH Zürich A CIL Tutorial - Department of Computer Science - ETH Zürich
CHAPTER 12. COMMENTS 106 adjacent to the given source location. The indexes are into the the array returned as the second element of the return value. let commentsAdjacent (cca : comment array) (l : location) : int list × comment array = if l = locUnknown then [ ], cca else let cca = prepareCommentArray cca l.file in (cca | > array bin search comment compare (comment of cilloc l)), cca The function commentsBetween returns a list of indexes into the array returned as the second element of the return value. The indexes indicate the comments lying between source locations l1 and l2. If the exact location is not in the comments array, the binary search function returns the two closest elements. Therefore commentsBetween returns the highest of the lower bounds, and the smallest of the upper bounds, so that only the indexes for the comments between the two locations are returned. let commentsBetween (cca : comment array) (l1 : location) (l2 : location) : int list × comment array = if l1 = locUnknown then commentsAdjacent cca l2 else if l1.file ≠ l2.file then commentsAdjacent cca l2 else begin let cca = prepareCommentArray cca l1.file in let ll = array bin search comment compare (comment of cilloc l1) cca in let hl = array bin search comment compare (comment of cilloc l2) cca in let l, h = match ll, hl with | ([l] | [ ; l]), h :: → l, h | → E.s(E.bug "bad result from array bin search") in (Array.init (h − l + 1) (fun i → i + l) | > Array.to list), cca end The function markComment searches a comment array for an exact source location, and marks the third element of the tuple for that location as true, indicating in this example that the comment has been printed by printComments. let markComment (l : A.cabsloc) (cca : comment array) : unit = Array.iteri (fun i (l', s, b) → if compare l l' = 0 then cca.(i) ← (l', s,true) ) cca The function printComments prints the comments from the array cca' indicated by the indexes in il and marks the comments as having been printed in cca. The location l is used to indicate the source location being inspected by an instance of the commentVisitorClass that triggered the call to printComments.
CHAPTER 12. COMMENTS 107 let printComments (cca : comment array) (l : location) ((il, cca') : int list × comment array) : location = L.iter (fun i → let c = cca'.(i) in if ¬(thd3 c) then begin markComment (fst3 c) cca; E.log "%a: Comment: %a -> %s\n" d loc l d loc (cilloc of cabsloc (fst3 c)) (snd3 c) end ) il; if il ≠ [ ] then il | > L.rev | > L.hd | > Array.get cca' | > fst3 | > cilloc of cabsloc else l The commentVisitorClass visitor visits the AST, printing comments nearby instructions and statements. class commentVisitorClass (cca : comment array) = object(self) inherit nopCilVisitor val mutable last = locUnknown method vinst (i : instr) = last ← i | > get instrLoc |> commentsBetween cca last |> printComments cca (get instrLoc i); DoChildren method vstmt (s : stmt) = last ← s.skind | > get stmtLoc |> commentsBetween cca last |> printComments cca (get stmtLoc s.skind); DoChildren end The function tut12 is the entry point for this module. First it copies the GrowArray.t of comments into an array. Then, it instantiates the commentVisitorClass visitor, and runs it over the Cil.file passed as an argument. let tut12 (f : file) : unit = let cca = array of growarray CH.commentsGA in let vis = new commentVisitorClass cca in visitCilFile vis f
- Page 57 and 58: CHAPTER 7. TYPE QUALIFIERS 55 let w
- Page 59 and 60: CHAPTER 7. TYPE QUALIFIERS 57 $ cil
- Page 61 and 62: Chapter 8 Dependant Type Qualiers O
- Page 63 and 64: CHAPTER 8. DEPENDANT TYPE QUALIFIER
- Page 65 and 66: CHAPTER 8. DEPENDANT TYPE QUALIFIER
- Page 67 and 68: CHAPTER 8. DEPENDANT TYPE QUALIFIER
- Page 69 and 70: CHAPTER 8. DEPENDANT TYPE QUALIFIER
- Page 71 and 72: CHAPTER 8. DEPENDANT TYPE QUALIFIER
- Page 73 and 74: Chapter 9 Type Qualier Inference In
- Page 75 and 76: CHAPTER 9. TYPE QUALIFIER INFERENCE
- Page 77 and 78: CHAPTER 9. TYPE QUALIFIER INFERENCE
- Page 79 and 80: CHAPTER 9. TYPE QUALIFIER INFERENCE
- Page 81 and 82: CHAPTER 9. TYPE QUALIFIER INFERENCE
- Page 83 and 84: Chapter 10 Adding a New Kind of Sta
- Page 85 and 86: CHAPTER 10. ADDING A NEW KIND OF ST
- Page 87 and 88: CHAPTER 10. ADDING A NEW KIND OF ST
- Page 89 and 90: CHAPTER 10. ADDING A NEW KIND OF ST
- Page 91 and 92: CHAPTER 10. ADDING A NEW KIND OF ST
- Page 93 and 94: Chapter 11 Program Verication In th
- Page 95 and 96: CHAPTER 11. PROGRAM VERIFICATION 93
- Page 97 and 98: CHAPTER 11. PROGRAM VERIFICATION 95
- Page 99 and 100: CHAPTER 11. PROGRAM VERIFICATION 97
- Page 101 and 102: CHAPTER 11. PROGRAM VERIFICATION 99
- Page 103 and 104: CHAPTER 11. PROGRAM VERIFICATION 10
- Page 105 and 106: CHAPTER 11. PROGRAM VERIFICATION 10
- Page 107: Chapter 12 Comments CIL has a very
- Page 111 and 112: References [1] Lin Tan, Ding Yuan,
- Page 113 and 114: CHAPTER 13. WHOLE-PROGRAM ANALYSIS
- Page 115 and 116: CHAPTER 13. WHOLE-PROGRAM ANALYSIS
- Page 117 and 118: CHAPTER 14. IMPLEMENTING A SIMPLE D
- Page 119 and 120: CHAPTER 14. IMPLEMENTING A SIMPLE D
- Page 121 and 122: CHAPTER 14. IMPLEMENTING A SIMPLE D
- Page 123 and 124: CHAPTER 14. IMPLEMENTING A SIMPLE D
- Page 125 and 126: CHAPTER 14. IMPLEMENTING A SIMPLE D
- Page 127 and 128: Chapter 15 Automated Test Generatio
- Page 129 and 130: CHAPTER 15. AUTOMATED TEST GENERATI
- Page 131 and 132: CHAPTER 15. AUTOMATED TEST GENERATI
- Page 133 and 134: CHAPTER 15. AUTOMATED TEST GENERATI
- Page 135 and 136: Index A (module), 10, 13, 15, 10, 1
- Page 137 and 138: INDEX 135 isCacheReportType, 11, 11
CHAPTER 12. COMMENTS 107<br />
let printComments (cca : comment array) (l : location)<br />
((il, cca') : int list × comment array) : location =<br />
L.iter (fun i → let c = cca'.(i) in<br />
if ¬(thd3 c) then begin<br />
markComment (fst3 c) cca;<br />
E.log "%a: Comment: %a -> %s\n"<br />
d loc l d loc (cilloc <strong>of</strong> cabsloc (fst3 c)) (snd3 c)<br />
end<br />
) il;<br />
if il ≠ [ ]<br />
then il | > L.rev | > L.hd | > Array.get cca' | > fst3 | > cilloc <strong>of</strong> cabsloc<br />
else l<br />
The commentVisitorClass visitor visits the AST, printing comments nearby instructions and statements.<br />
class commentVisitorClass (cca : comment array) = object(self)<br />
inherit nopCilVisitor<br />
val mutable last = locUnknown<br />
method vinst (i : instr) =<br />
last ← i | > get instrLoc<br />
|> commentsBetween cca last<br />
|> printComments cca (get instrLoc i);<br />
DoChildren<br />
method vstmt (s : stmt) =<br />
last ← s.skind | > get stmtLoc<br />
|> commentsBetween cca last<br />
|> printComments cca (get stmtLoc s.skind);<br />
DoChildren<br />
end<br />
The function tut12 is the entry point for this module. First it copies the GrowArray.t <strong>of</strong> comments<br />
into an array. Then, it instantiates the commentVisitorClass visitor, and runs it over the Cil.file<br />
passed as an argument.<br />
let tut12 (f : file) : unit =<br />
let cca = array <strong>of</strong> growarray CH.commentsGA in<br />
let vis = new commentVisitorClass cca in<br />
visitCilFile vis f
Change language