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;;; A frontend for the SBCL code coverage facility. Written by Juho
;;; Snellman, and placed under public domain.
;;; This module includes a modified version of the source path parsing
;;; routines from Swank. That code was written by Helmut Eller, and
;;; was placed under Public Domain
(defpackage #:sb-cover
(:use #:cl #:sb-c)
(:export #:report
#:reset-coverage #:clear-coverage
#:restore-coverage #:restore-coverage-from-file
#:save-coverage #:save-coverage-in-file
#:store-coverage-data))
(in-package #:sb-cover)
(declaim (type (member :whole :car) *source-path-mode*))
(defvar *source-path-mode* :whole)
(defclass sample-count ()
((mode :accessor mode-of :initarg :mode)
(all :accessor all-of :initform 0)
(ok :accessor ok-of :initform 0)))
(defun clear-coverage ()
"Clear all files from the coverage database. The files will be re-entered
into the database when the FASL files (produced by compiling
STORE-COVERAGE-DATA optimization policy set to 3) are loaded again into the
image."
(sb-c::clear-code-coverage))
(defun reset-coverage ()
"Reset all coverage data back to the `Not executed` state."
(sb-c::reset-code-coverage))
(defun save-coverage ()
"Returns an opaque representation of the current code coverage state.
The only operation that may be done on the state is passing it to
RESTORE-COVERAGE. The representation is guaranteed to be readably printable.
A representation that has been printed and read back will work identically
in RESTORE-COVERAGE."
(loop for file being the hash-keys of sb-c::*code-coverage-info*
using (hash-value states)
collect (cons file states)))
(defun restore-coverage (coverage-state)
"Restore the code coverage data back to an earlier state produced by
SAVE-COVERAGE."
(loop for (file . states) in coverage-state
do (let ((image-states (gethash file sb-c::*code-coverage-info*))
(table (make-hash-table :test 'equal)))
(when image-states
(loop for cons in image-states
do (setf (gethash (car cons) table) cons))
(loop for (key . value) in states
do (let ((state (gethash key table)))
(when state
(setf (cdr state) value))))))))
(defun save-coverage-in-file (pathname)
"Call SAVE-COVERAGE and write the results of that operation into the
file designated by PATHNAME."
(with-open-file (stream pathname
:direction :output
:if-exists :supersede
:if-does-not-exist :create)
(with-standard-io-syntax
(let ((*package* (find-package :sb-cover)))
(write (save-coverage) :stream stream)))
(values)))
(defun restore-coverage-from-file (pathname)
"READ the contents of the file designated by PATHNAME and pass the
result to RESTORE-COVERAGE."
(with-open-file (stream pathname :direction :input)
(with-standard-io-syntax
(let ((*package* (find-package :sb-cover)))
(restore-coverage (read stream))))
(values)))
(defun pathname-as-directory (pathname &optional (errorp t))
(let ((pathname (merge-pathnames pathname)))
(if (and (member (pathname-name pathname) '(nil :unspecific))
(member (pathname-type pathname) '(nil :unspecific)))
pathname
(if errorp
(error "~S does not designate a directory" pathname)
(make-pathname :directory (append (or (pathname-directory pathname)
(list :relative))
(list (file-namestring pathname)))
:name nil :type nil :version nil
:defaults pathname)))))
(defun report (directory &key ((:form-mode *source-path-mode*) :whole)
(external-format :default))
"Print a code coverage report of all instrumented files into DIRECTORY.
If DIRECTORY does not exist, it will be created. The main report will be
printed to the file cover-index.html. The external format of the source
files can be specified with the EXTERNAL-FORMAT parameter.
If the keyword argument FORM-MODE has the value :CAR, the annotations in
the coverage report will be placed on the CARs of any cons-forms, while if
it has the value :WHOLE the whole form will be annotated (the default).
The former mode shows explicitly which forms were instrumented, while the
latter mode is generally easier to read."
(let* ((paths)
(directory (pathname-as-directory directory))
(*default-pathname-defaults* (translate-logical-pathname directory)))
(ensure-directories-exist *default-pathname-defaults*)
(maphash (lambda (k v)
(declare (ignore v))
(let* ((pk (translate-logical-pathname k))
(n (format nil "~(~{~2,'0X~}~)"
(coerce (sb-md5:md5sum-string
(sb-ext:native-namestring pk))
'list)))
(path (make-pathname :name n :type "html" :defaults directory)))
(when (probe-file k)
(ensure-directories-exist pk)
(with-open-file (stream path
:direction :output
:if-exists :supersede
:if-does-not-exist :create)
(push (list* k n (report-file k stream external-format))
paths)))))
*code-coverage-info*)
(let ((report-file (make-pathname :name "cover-index" :type "html" :defaults directory)))
(with-open-file (stream report-file
:direction :output :if-exists :supersede
:if-does-not-exist :create)
(write-styles stream)
(unless paths
(warn "No coverage data found for any file, producing an empty report. Maybe you~%forgot to (DECLAIM (OPTIMIZE SB-COVER:STORE-COVERAGE-DATA))?")
(format stream "<h3>No code coverage data found.</h3>")
(close stream)
(return-from report))
(format stream "<table class='summary'>")
(format stream "<tr class='head-row'><td></td><td class='main-head' colspan='3'>Expression</td><td class='main-head' colspan='3'>Branch</td></tr>")
(format stream "<tr class='head-row'>~{<td width='80px'>~A</td>~}</tr>"
(list "Source file"
"Covered" "Total" "%"
"Covered" "Total" "%"))
(setf paths (sort paths #'string< :key #'car))
(loop for prev = nil then source-file
for (source-file report-file expression branch) in paths
for even = nil then (not even)
do (when (or (null prev)
(not (equal (pathname-directory (pathname source-file))
(pathname-directory (pathname prev)))))
(format stream "<tr class='subheading'><td colspan='7'>~A</td></tr>~%"
(namestring (make-pathname :directory (pathname-directory (pathname source-file))))))
do (format stream "<tr class='~:[odd~;even~]'><td class='text-cell'><a href='~a.html'>~a</a></td>~{<td>~:[-~;~:*~a~]</td><td>~:[-~;~:*~a~]</td><td>~:[-~;~:*~5,1f~]</td>~}</tr>"
even
report-file
(enough-namestring (pathname source-file)
(pathname source-file))
(list (ok-of expression)
(all-of expression)
(percent expression)
(ok-of branch)
(all-of branch)
(percent branch))))
(format stream "</table>"))
report-file)))
(defun percent (count)
(unless (zerop (all-of count))
(* 100
(/ (ok-of count) (all-of count)))))
(defun report-file (file html-stream external-format)
"Print a code coverage report of FILE into the stream HTML-STREAM."
(format html-stream "<html><head>")
(write-styles html-stream)
(format html-stream "</head><body>")
(let* ((source (detabify (read-file file external-format)))
(states (make-array (length source)
:initial-element 0
:element-type '(unsigned-byte 4)))
;; Convert the code coverage records to a more suitable format
;; for this function.
(expr-records (convert-records (gethash file *code-coverage-info*)
:expression))
(branch-records (convert-records (gethash file *code-coverage-info*)
:branch))
;; Cache the source-maps
(maps (with-input-from-string (stream source)
(loop with map = nil
with form = nil
with eof = nil
for i from 0
do (setf (values form map)
(handler-case
(read-and-record-source-map stream)
(end-of-file ()
(setf eof t))
(error (error)
(warn "Error when recording source map for toplevel form ~A:~% ~A" i error)
(values nil
(make-hash-table)))))
until eof
when map
collect (cons form map)))))
(mapcar (lambda (map)
(maphash (lambda (k locations)
(declare (ignore k))
(dolist (location locations)
(destructuring-bind (start end suppress) location
(when suppress
(fill-with-state source states 15 (1- start)
end)))))
(cdr map)))
maps)
;; Go through all records, find the matching source in the file,
;; and update STATES to contain the state of the record in the
;; indexes matching the source location. We do this in two stages:
;; the first stage records the character ranges, and the second stage
;; does the update, in order from shortest to longest ranges. This
;; ensures that for each index in STATES will reflect the state of
;; the innermost containing form.
(let ((counts (list :branch (make-instance 'sample-count :mode :branch)
:expression (make-instance 'sample-count
:mode :expression))))
(let ((records (append branch-records expr-records))
(locations nil))
(dolist (record records)
(destructuring-bind (mode path state) record
(let* ((path (reverse path))
(tlf (car path))
(source-form (car (nth tlf maps)))
(source-map (cdr (nth tlf maps)))
(source-path (cdr path)))
(cond ((eql mode :branch)
(let ((count (getf counts :branch)))
;; For branches mode each record accounts for two paths
(incf (ok-of count)
(ecase state
(5 2)
((6 9) 1)
(10 0)))
(incf (all-of count) 2)))
(t
(let ((count (getf counts :expression)))
(when (eql state 1)
(incf (ok-of count)))
(incf (all-of count)))))
(if source-map
(handler-case
(multiple-value-bind (start end)
(source-path-source-position (cons 0 source-path)
source-form
source-map)
(push (list start end source state) locations))
(error ()
(warn "Error finding source location for source path ~A in file ~A~%" source-path file)))
(warn "Unable to find a source map for toplevel form ~A in file ~A~%" tlf file)))))
;; Now process the locations, from the shortest range to the longest
;; one. If two locations have the same range, the one with the higher
;; state takes precedence. The latter condition ensures that if
;; there are both normal- and a branch-states for the same form,
;; the branch-state will be used.
(setf locations (sort locations #'> :key #'fourth))
(dolist (location (stable-sort locations #'<
:key (lambda (location)
(- (second location)
(first location)))))
(destructuring-bind (start end source state) location
(fill-with-state source states state start end))))
(print-report html-stream file counts states source)
(format html-stream "</body></html>")
(list (getf counts :expression)
(getf counts :branch)))))
(defun fill-with-state (source states state start end)
(let* ((pos (position #\Newline source
:end start
:from-end t))
(start-column (if pos
(- start 1 pos)
0))
(end-column 0))
(loop for i from start below end
for col from start-column
for char = (aref source i)
do (cond ((eql char #\Newline)
(setf col -1))
((not (eql char #\Space))
(setf end-column (max end-column col)))))
(loop for i from start below end
for col from start-column
for char = (aref source i)
do (if (eql char #\Newline)
(setf col -1)
(when (and (zerop (aref states i))
#+nil (<= col end-column)
(>= col start-column))
(setf (aref states i) state))))))
;;; Convert tabs to spaces
(defun detabify (source)
(with-output-to-string (stream)
(loop for char across source
for col from 0
for i from 0
do (if (eql char #\Tab)
(loop repeat (- 8 (mod col 8))
do (write-char #\Space stream)
do (incf col)
finally (decf col))
(progn
(when (eql char #\Newline)
;; Filter out empty last line
(when (eql i (1- (length source)))
(return))
(setf col -1))
(write-char char stream))))))
(defvar *counts* nil)
(defun print-report (html-stream file counts states source)
;; Just used for testing
(setf *counts* counts)
(let ((*print-case* :downcase))
(format html-stream
"<h3>Coverage report: ~a <br />~%</h3>~%" file)
(when (zerop (all-of (getf counts :expression)))
(format html-stream "<b>File has no instrumented forms</b>")
(return-from print-report))
(format html-stream "<table class='summary'><tr class='head-row'>~{<td width='80px'>~a</td>~}"
(list "Kind" "Covered" "All" "%"))
(dolist (mode '(:expression :branch))
(let ((count (getf counts mode)))
(format html-stream "<tr class='~:[odd~;even~]'><td>~A</td><td>~a</td><td>~a</td><td>~5,1F</td></tr>~%"
(eql mode :branch)
mode
(ok-of count)
(all-of count)
(percent count))))
(format html-stream "</table>"))
(format html-stream "<div class='key'><b>Key</b><br />~%")
(format html-stream "<div class='state-0'>Not instrumented</div>")
(format html-stream "<div class='state-15'>Conditionalized out</div>")
(format html-stream "<div class='state-1'>Executed</div>")
(format html-stream "<div class='state-2'>Not executed</div>")
(format html-stream "<div>&#160;</div>")
(format html-stream "<div class='state-5'>Both branches taken</div>")
(format html-stream "<div class='state-6'>One branch taken</div>")
(format html-stream "<div class='state-10''>Neither branch taken</div>")
(format html-stream "</div>")
(format html-stream "<nobr><div><code>~%")
(flet ((line (line)
(format html-stream "</code></div></nobr>~%<nobr><div class='source'><div class='line-number'><code>~A</code></div><code>&#160;" line)
line))
(loop for last-state = nil then state
with line = (line 1)
for col from 1
for char across source
for state across states
do (unless (eq state last-state)
(when last-state
(format html-stream "</span>"))
(format html-stream "<span class='state-~a'>" state))
do (case char
((#\Newline)
(setf state nil)
(setf col 0)
(format html-stream "</span>")
(line (incf line)))
((#\Space)
(format html-stream "&#160;"))
((#\Tab)
(error "tab"))
(t
(if (alphanumericp char)
(write-char char html-stream)
(format html-stream "&#~A;" (char-code char))))))
(format html-stream "</code></div>")))
(defun write-styles (html-stream)
(format html-stream "<style type='text/css'>
*.state-0 { background-color: #eeeeee }
*.state-1 { background-color: #aaffaa }
*.state-5 { background-color: #44dd44 }
*.state-2 { background-color: #ffaaaa }
*.state-10 { background-color: #ee6666 }
*.state-15 { color: #aaaaaa; background-color: #eeeeee }
*.state-9,*.state-6 { background-color: #ffffaa }
div.key { margin: 20px; width: 200px }
div.source { width: 88ex; background-color: #eeeeee; padding-left: 5px;
/* border-style: solid none none none; border-width: 1px;
border-color: #dddddd */ }
*.line-number { color: #666666; float: left; width: 6ex; text-align: right; margin-right: 1ex; }
table.summary tr.head-row { background-color: #aaaaff }
table.summary tr td.text-cell { text-align: left }
table.summary tr td.main-head { text-align: center }
table.summary tr td { text-align: right }
table.summary tr.even { background-color: #eeeeff }
table.summary tr.subheading { background-color: #aaaaff}
table.summary tr.subheading td { text-align: left; font-weight: bold; padding-left: 5ex; }
</style>"))
(defun convert-records (records mode)
(ecase mode
(:expression
(loop for record in records
unless (member (caar record) '(:then :else))
collect (list mode
(car record)
(if (sb-c::code-coverage-record-marked record)
1
2))))
(:branch
(let ((hash (make-hash-table :test 'equal)))
(dolist (record records)
(let ((path (car record)))
(when (member (car path) '(:then :else))
(setf (gethash (cdr path) hash)
(logior (gethash (cdr path) hash 0)
(ash (if (sb-c::code-coverage-record-marked record)
1
2)
(if (eql (car path) :then)
0
2)))))))
(let ((list nil))
(maphash (lambda (k v)
(push (list mode k v) list))
hash)
list)))))
;;;; A mutant version of swank-source-path-parser from Swank/Slime.
(defun read-file (filename external-format)
"Return the entire contents of FILENAME as a string."
(with-open-file (s filename :direction :input
:external-format external-format)
(let ((string (make-string (file-length s))))
(read-sequence string s)
string)))
(defun make-source-recorder (fn source-map)
"Return a macro character function that does the same as FN, but
additionally stores the result together with the stream positions
before and after of calling FN in the hashtable SOURCE-MAP."
(declare (type function fn))
(lambda (stream char)
(declare (optimize debug safety))
(let ((start (file-position stream))
(values (multiple-value-list (funcall fn stream char)))
(end (file-position stream)))
(unless (null values)
(push (list start end *read-suppress*)
(gethash (car values) source-map)))
(values-list values))))
(defun make-source-recording-readtable (readtable source-map)
"Return a source position recording copy of READTABLE.
The source locations are stored in SOURCE-MAP."
(let* ((tab (copy-readtable readtable))
(*readtable* tab))
(dotimes (code 128)
(let ((char (code-char code)))
(multiple-value-bind (fn term) (get-macro-character char tab)
(when fn
(set-macro-character char (make-source-recorder fn source-map)
term tab)))))
(suppress-sharp-dot tab)
(set-macro-character #\(
(make-source-recorder
(make-recording-read-list source-map)
source-map))
tab))
;;; Ripped from SB-IMPL, since location recording on a cons-cell level
;;; can't be done just by simple read-table tricks.
(defun make-recording-read-list (source-map)
(lambda (stream ignore)
(block return
(when (eql *package* (find-package :keyword))
(return-from return
(sb-impl::read-list stream ignore)))
(let* ((thelist (list nil))
(listtail thelist))
(do ((firstchar (sb-impl::flush-whitespace stream)
(sb-impl::flush-whitespace stream)))
((char= firstchar #\) ) (cdr thelist))
(when (char= firstchar #\.)
(let ((nextchar (read-char stream t)))
(cond ((sb-impl::token-delimiterp nextchar)
(cond ((eq listtail thelist)
(unless *read-suppress*
(sb-int:simple-reader-error
stream
"Nothing appears before . in list.")))
((sb-impl::whitespace[2]p nextchar)
(setq nextchar (sb-impl::flush-whitespace stream))))
(rplacd listtail
;; Return list containing last thing.
(car (sb-impl::read-after-dot stream nextchar)))
(return (cdr thelist)))
;; Put back NEXTCHAR so that we can read it normally.
(t (unread-char nextchar stream)))))
;; Next thing is not an isolated dot.
(let ((start (file-position stream))
(listobj (sb-impl::read-maybe-nothing stream firstchar))
(end (file-position stream)))
;; allows the possibility that a comment was read
(when listobj
(unless (consp (car listobj))
(setf (car listobj) (gensym))
(push (list start end *read-suppress*)
(gethash (car listobj) source-map)))
(rplacd listtail listobj)
(setq listtail listobj))))))))
(defun suppress-sharp-dot (readtable)
(when (get-macro-character #\# readtable)
(let ((sharp-dot (get-dispatch-macro-character #\# #\. readtable)))
(set-dispatch-macro-character #\# #\.
(lambda (&rest args)
(let ((*read-suppress* t))
(apply sharp-dot args)))
readtable))))
(defun read-and-record-source-map (stream)
"Read the next object from STREAM.
Return the object together with a hashtable that maps
subexpressions of the object to stream positions."
(let* ((source-map (make-hash-table :test #'eq))
(*readtable* (make-source-recording-readtable *readtable* source-map))
(start (file-position stream))
(form (read stream))
(end (file-position stream)))
;; ensure that at least FORM is in the source-map
(unless (gethash form source-map)
(push (list start end nil)
(gethash form source-map)))
(values form source-map)))
(defun read-source-form (n stream)
"Read the Nth toplevel form number with source location recording.
Return the form and the source-map."
(let ((*read-suppress* t))
(dotimes (i n)
(read stream)))
(let ((*read-suppress* nil)
(*read-eval* nil))
(read-and-record-source-map stream)))
(defun source-path-stream-position (path stream)
"Search the source-path PATH in STREAM and return its position."
(check-source-path path)
(destructuring-bind (tlf-number . path) path
(multiple-value-bind (form source-map) (read-source-form tlf-number stream)
(source-path-source-position (cons 0 path) form source-map))))
(defun check-source-path (path)
(unless (and (consp path)
(every #'integerp path))
(error "The source-path ~S is not valid." path)))
(defun source-path-string-position (path string)
(with-input-from-string (s string)
(source-path-stream-position path s)))
(defun source-path-file-position (path filename)
(with-open-file (file filename)
(source-path-stream-position path file)))
(defun source-path-source-position (path form source-map)
"Return the start position of PATH from FORM and SOURCE-MAP. All
subforms along the path are considered and the start and end position
of the deepest (i.e. smallest) possible form is returned."
;; compute all subforms along path
(let ((forms (loop for n in path
for f = form then (nth n f)
collect f into forms
finally (return forms))))
;; select the first subform present in source-map
(loop for real-form in (reverse forms)
for form = (if (or (eql *source-path-mode* :whole)
(not (consp real-form)))
real-form
(car real-form))
for positions = (gethash form source-map)
until (and positions (null (cdr positions)))
finally (destructuring-bind ((start end suppress)) positions
(declare (ignore suppress))
(return (values (1- start) end))))))