(pop *posix-argv*)
(require :sb-posix)
#-sparc (push :test-sprof *features*)
#+test-sprof (require :sb-sprof)

;; (push :tlsf-stress *features*)
#+tlsf-stress
(progn
 (setq sb-c:*compile-to-memory-space* :immobile)
 (with-alien ((tlsf-control system-area-pointer :extern)
              (tlsf-mem-start system-area-pointer :extern))
   (defun tlsf-checks ()
     (alien-funcall (extern-alien "tlsf_check" (function void system-area-pointer))
                    tlsf-control)
     (alien-funcall (extern-alien "tlsf_check_pool" (function void system-area-pointer))
                    tlsf-mem-start)
    (let ((msg #.(format nil "TLSF checks passed~%")))
       (sb-unix:unix-write 2 msg 0 (length msg))))
   (defun tlsf-dump ()
     (alien-funcall (extern-alien "tlsf_dump_pool"
       (function void system-area-pointer system-area-pointer c-string))
       tlsf-control tlsf-mem-start "/dev/stdout")))
  (compile 'tlsf-checks)
  (compile 'tlsf-dump)
  (push #'tlsf-checks sb-ext:*after-gc-hooks*))

(let ((*evaluator-mode* :compile))
  (with-compilation-unit () (load"run-tests")))
#+(and x86-64 linux sb-thread)
  (unless (or (find :mark-region-gc sb-impl:+internal-features+)
              (find :gs-seg sb-impl:+internal-features+))
    (push :test-aprof *features*))
(in-package run-tests)
(import '(sb-alien:alien-funcall sb-alien:extern-alien
          sb-alien:int sb-alien:c-string sb-alien:unsigned))
(setq *summarize-test-times* t)
;;; Ordered approximately in descending order by running time
(defvar *timings* (with-open-file (s "timing") (read s)))

(defvar *filter* nil)
(defglobal *delete-logs* nil)
(defun choose-order (tests)
  (when *filter*
    (let (strings)
      (with-open-file (file *filter*)
        (loop (let ((line (read-line file nil)))
                (if line (push line strings) (return)))))
      (setq tests (remove-if (lambda (x) (not (find x strings :test #'string=)))
                             tests))))
  (sort tests
        #'> :key (lambda (file) (or (cadr (assoc file *timings* :test #'equal)) 0))))

(defvar *logdir* (posix-getenv "TEST_LOGDIR"))

(defun summarize-gc-times ()
  ;; this function prints random numbers now, I don't know why
  (return-from summarize-gc-times)
  (let (observations)
    (flet ((parse-triple (string pos)
             (sb-int:binding* (((int1 end) (parse-integer string :start (1+ pos)
                                                                 :junk-allowed t))
                               ((int2 end) (parse-integer string :start (1+ end)
                                                                 :junk-allowed t))
                               ((int3) (parse-integer string :start (1+ end)
                                                             :junk-allowed t)))
               (list int1 int2 int3))))
      (dolist (pn (directory (format nil "~a/*.*" *logdir*)))
        (with-open-file (f pn)
          (let ((legend "GC: stw_delay"))
            (loop
             (let ((line (read-line f nil)))
               (unless line (return))
               (when (and (> (length line) (length legend))
                          (string= line legend :end1 (length legend)))
                 (let* ((p1 (position #\= line))
                        (p2 (position #\= line :start (1+ p1)))
                        (stw-dur (parse-triple line p1))
                        (gc-dur (parse-triple line p2))
                        (count (parse-integer line :start (+ (search "over " line) 5)
                                              :junk-allowed t)))
                   (let ((name (concatenate 'string (pathname-name pn) "."
                                            (pathname-type pn))))
                     (push (list count stw-dur gc-dur name) observations))))))))))
    (let ((fmt "  ~5d (~{~10d~^ ~}) (~{~7d~^ ~}) ~a~%"))
      (format t "~&Top 15 worst by max time to stop-the-world:~%")
      (let ((list (sort (copy-list observations) #'> :key (lambda (x) (third (second x))))))
        (dotimes (i 15) (apply #'format t fmt (pop list))))
      (format t "~&Top 15 worst by avg GC duration (excluding STW delay):~%")
      (let ((list (sort (copy-list observations) #'> :key (lambda (x) (second (third x))))))
        (dotimes (i 15) (apply #'format t fmt (pop list))))
      (format t "~&Top 15 worst by max GC duration (excluding STW delay):~%")
      (let ((list (sort (copy-list observations) #'> :key (lambda (x) (third (third x))))))
        (dotimes (i 15) (apply #'format t fmt (pop list)))))))
(defun parallel-execute-tests (files max-jobs vop-summary-stats-p)
  (format t "Using ~D processes~%" max-jobs)
  ;; Interleave the order in which all tests are launched rather than
  ;; starting them in the batches that filtering places them in.
  (let ((subprocess-count 0)
        (subprocess-list nil)
        (aggregate-vop-usage (make-hash-table :test #'equal))
        ;; Start timing only after all the DIRECTORY calls are done (above)
        (start-time (get-internal-real-time))
        (missing-usage)
        (losing))
    (labels ((wait ()
               ;; Though far from elegant, this is an easy way to figure out
               ;; which tests are getting stuck, if any are.
               #+nil (format t "Runner is waiting on: ~S~%" subprocess-list)
               (multiple-value-bind (pid status) (sb-posix:wait)
                 (decf subprocess-count)
                 (let ((process (assoc pid subprocess-list))
                       (code (ash status -8))
                       (et))
                   (unless process
                     (warn "Whoa! Process ~D is an unexpected child" pid)
                     (return-from wait (wait)))
                   (setq subprocess-list (delete process subprocess-list))
                   (destructuring-bind ((filename . iteration) start-time) (cdr process)
                     (setq et (elapsed-time-from start-time))
                     (when vop-summary-stats-p
                       (unless (sum-vop-usage (format nil "~a/~a.vop-usage" *logdir* filename) t)
                         (when (or (search ".pure" filename) (search ".impure" filename))
                           (push filename missing-usage))))
                     (cond ((eq code 104)
                            (format t "~A: success (~d msec)~%" filename et))
                           (t
                            (format t "~A~@[[~d]~]: status ~D (~d msec)~%"
                                      filename iteration code et)
                            (push (list filename iteration pid) losing)))))))
             (elapsed-time-from (when) ; return value in milliseconds
               (round (- (get-internal-real-time) when)
                      (/ internal-time-units-per-second 1000)))
             (sum-vop-usage (input deletep)
               (with-open-file (f input :if-does-not-exist nil)
                 ;; No vop coverage file from shell script tests or any test
                 ;; that internally uses (EXIT) for whatever reason.
                 (when f
                   (loop (let ((line (read-line f nil)))
                           (unless line (return))
                           (let ((count (read-from-string line))
                                 (name (subseq line 8)))
                             (incf (gethash name aggregate-vop-usage 0) count))))
                   (when deletep (delete-file f))))))
      (dolist (file files)
        (when (>= subprocess-count max-jobs)
          (wait))
        (let ((pid (sb-posix:fork)))
          (when (zerop pid)
          (let  ((mylog (format nil "~a/~a~@[-~d~]" *logdir* (car file) (cdr file))))
            ;; FILE is (filename . test-iteration)
            (with-open-file (stream mylog :direction :output :if-exists :supersede)
              (alien-funcall (extern-alien "dup2" (function int int int))
                             (sb-sys:fd-stream-fd stream) 1)
              (alien-funcall (extern-alien "dup2" (function int int int)) 1 2))
            (setq file (car file))
            #+test-aprof
            (unless (search "allocator.pure" file)
              (sb-aprof::aprof-start)
              (proclaim '(optimize sb-c:instrument-consing)))
            ;; Send this to the log file, not the terminal
            (setq *debug-io* (make-two-way-stream (make-concatenated-stream)
                                                  *error-output*))
            (cond ((string= (pathname-type file) "test")
                   (let ((shell (or #+sunos (posix-getenv "SHELL") "/bin/sh")))
                     ;; exec the shell with the test and we'll pick up its exit code
                     (alien-funcall (extern-alien "execl" (function int c-string c-string
                                                                    &optional c-string unsigned))
                                    shell shell
                                    (concatenate 'string file ".sh") 0))
                   ;; if exec fails, just exit with a wrong (not 104) status
                   (alien-funcall (extern-alien "_exit" (function (values) int)) 0))
                  (t
                   #+test-sprof (sb-sprof:start-profiling :sample-interval .001)
                   (setq sb-c::*static-vop-usage-counts* (make-hash-table :synchronized t))
                   (let ((*features* (cons :parallel-test-runner *features*)))
                     (pure-runner (list (concatenate 'string file ".lisp"))
                                  (if (search "-cload" file) 'cload-test 'load-test)
                                  (make-broadcast-stream)))
                   (when vop-summary-stats-p
                     (with-open-file (output (format nil "~a/~a.vop-usage" *logdir* file)
                                             :direction :output)
                       ;; There's an impure test that screws with the default pprint dispatch
                       ;; table such that integers don't print normally (and can't be parsed).
                       (let ((*print-pretty* nil))
                         (sb-int:dohash ((name count) sb-c::*static-vop-usage-counts*)
                           (format output "~7d \"~s\"~%" count name)))))
                   #+test-sprof (sb-sprof:stop-profiling)
                   #+test-aprof (progn (sb-aprof::aprof-stop) (sb-aprof:aprof-show))
                   (when (member :allocator-metrics sb-impl:+internal-features+)
                     (format t "~2&Allocator histogram:~%")
                     (funcall (intern "PRINT-ALLOCATOR-HISTOGRAM" "SB-THREAD")))
                   #+test-sprof (sb-sprof:report :type :flat)
                   #+tlsf-stress (cl-user::tlsf-dump)
                   #-arm64 ;; causes crashes
                   (gc :gen 7)
                   (when (and (not (unexpected-failures)) *delete-logs*) (delete-file mylog))
                   (exit :code (if (unexpected-failures) 1 104))))))
          (format t "~A: pid ~d~@[ (trial ~d)~]~%" (car file) pid (cdr file))
          (incf subprocess-count)
          (push (list pid file (get-internal-real-time)) subprocess-list)))
      (loop (if (plusp subprocess-count) (wait) (return)))

      (when vop-summary-stats-p
        (dolist (result '("vop-usage.txt" "vop-usage-combined.txt"))
          (let (list)
            (sb-int:dohash ((name vop) sb-c::*backend-template-names*)
              (declare (ignore vop))
              (push (cons (gethash (prin1-to-string name) aggregate-vop-usage 0) name) list))
            (with-open-file (output (format nil "~a/~a" *logdir* result)
                                            :direction :output
                                            :if-exists :supersede)
              (dolist (cell (sort list #'> :key #'car))
                (format output "~7d ~s~%" (car cell) (cdr cell)))))
          (sum-vop-usage "../obj/from-self/warm-vop-usage.txt" nil)))

      (format t "~&Total realtime: ~d msec~%" (elapsed-time-from start-time))
      (when missing-usage
        (format t "~&Missing vop-usage:~{ ~a~}~%" missing-usage))

      (when losing
        (format t "~&Failing files:~%")
        (dolist (filename losing)
          (format t "~A~%" filename))
        (format t "==== Logs are in ~a ====~%" *logdir*)
        (exit :code 1)))))
(when (string= (car *posix-argv*) "--filter")
  (setq *filter* (cadr *posix-argv*))
  (setq *posix-argv* (cddr *posix-argv*)))
(if (<= (length *posix-argv*) 1)
    ;; short form - test all files. Argument N if specified is the number of
    ;; tasks, defaulting to half the machine's reported cores
    (let ((jobs
           (if *posix-argv*
               (parse-integer (car *posix-argv*))
               (or #+unix
                   (floor (sb-alien:alien-funcall
                           (sb-alien:extern-alien "sysconf"
                                                  (function sb-alien:long sb-alien:int))
                           sb-unix::sc-nprocessors-onln)
                          2)
                   (error "How many jobs?")))))
      (parallel-execute-tests
       (mapcar #'list
               (choose-order
                (mapcar #'pathname-name
                        (append (pure-load-files)
                                (pure-cload-files)
                                (impure-load-files)
                                (impure-cload-files)
                                (sh-files)))))
       jobs
       t)
      #+(and linux sb-thread 64-bit) (summarize-gc-times))
    ;; long form
    (let ((jobs 4)
          (runs-per-test 1)
          (argv *posix-argv*))
      (loop (cond ((string= (car argv) "-j")
                   (setq jobs (parse-integer (cadr argv))
                         argv (cddr argv)))
                  ((string= (car argv) "--runs_per_test")
                   (setq runs-per-test (parse-integer (cadr argv))
                         argv (cddr argv)))
                  (t
                   (return))))
      (when (>= runs-per-test 10)
        (format t "~&Note: will not keep logs of passing runs~%")
        (setq *delete-logs* t))
      (setq argv
        (mapcar (lambda (file)
                  (probe-file file) ; for effect
                  (pathname-name file)) argv))
      (parallel-execute-tests
       (loop for trial-number from 1 to runs-per-test
             nconc (mapcar (lambda (file)
                             (cons file
                                   (when (> runs-per-test 1) trial-number)))
                           argv))
       jobs
       nil)))
