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* bug#45907: [PATCH] Shr memory singularity gif89a
@ 2021-01-15 23:17 dick
  2021-01-18 10:45 ` Robert Pluim
  2021-01-19  5:57 ` Lars Ingebrigtsen
  0 siblings, 2 replies; 6+ messages in thread
From: dick @ 2021-01-15 23:17 UTC (permalink / raw)
  To: 45907

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Disclaimer: Avoid running this if you need your machine to be up.
emacs -Q --eval "(eww \"https://github.com/enphysoft/search-gmail-using-message-id\")"


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From 7d43e6ed260c7e920b656a21a4876b87b277d81d Mon Sep 17 00:00:00 2001
From: dickmao <none>
Date: Fri, 15 Jan 2021 18:02:44 -0500
Subject: [PATCH] Avoid gif89a explosions

With the increased use of gif89a, my gnus is achieving memory
consumption singularity more frequently.

* lisp/net/shr.el (shr-put-image): When content-type is
application/octet-stream, do not attempt insert-image.
* test/src/xdisp-tests.el (xdisp-tests--window-text-pixel-size,
xdisp-tests--window-text-pixel-size-leading-space,
xdisp-tests--window-text-pixel-size-trailing-space):
`make check` currently fails without conditioning these tests for
graphics display.
---
 lisp/net/shr.el         | 53 ++++++++++++++++++++------------------
 test/src/xdisp-tests.el | 57 ++++++++++++++++++++++-------------------
 2 files changed, 58 insertions(+), 52 deletions(-)

diff --git a/lisp/net/shr.el b/lisp/net/shr.el
index 9c3740fccc..eb69668f32 100644
--- a/lisp/net/shr.el
+++ b/lisp/net/shr.el
@@ -1109,46 +1109,49 @@ shr-put-image
   "Insert image SPEC with a string ALT.  Return image.
 SPEC is either an image data blob, or a list where the first
 element is the data blob and the second element is the content-type."
-  (if (display-graphic-p)
+  (let (image)
+    (when (display-graphic-p)
       (let* ((size (cdr (assq 'size flags)))
 	     (data (if (consp spec)
 		       (car spec)
 		     spec))
 	     (content-type (and (consp spec)
 				(cadr spec)))
-	     (start (point))
-	     (image (cond
-		     ((eq size 'original)
-		      (create-image data nil t :ascent 100
-				    :format content-type))
-		     ((eq content-type 'image/svg+xml)
-                      (when (image-type-available-p 'svg)
-		        (create-image data 'svg t :ascent 100)))
-		     ((eq size 'full)
-		      (ignore-errors
-			(shr-rescale-image data content-type
-                                           (plist-get flags :width)
-                                           (plist-get flags :height))))
-		     (t
-		      (ignore-errors
-			(shr-rescale-image data content-type
-                                           (plist-get flags :width)
-                                           (plist-get flags :height)))))))
+	     (start (point)))
+        (setq image
+              (cond
+	       ((eq size 'original)
+		(create-image data nil t :ascent 100
+			      :format content-type))
+	       ((eq content-type 'image/svg+xml)
+                (when (image-type-available-p 'svg)
+		  (create-image data 'svg t :ascent 100)))
+               ((eq content-type 'application/octet-stream)
+                nil)
+	       ((eq size 'full)
+		(ignore-errors
+		  (shr-rescale-image data content-type
+                                     (plist-get flags :width)
+                                     (plist-get flags :height))))
+	       (t
+		(ignore-errors
+		  (shr-rescale-image data content-type
+                                     (plist-get flags :width)
+                                     (plist-get flags :height))))))
         (when image
 	  ;; When inserting big-ish pictures, put them at the
 	  ;; beginning of the line.
-	  (when (and (> (current-column) 0)
+          (when (and (> (current-column) 0)
 		     (> (car (image-size image t)) 400))
 	    (insert "\n"))
 	  (if (eq size 'original)
 	      (insert-sliced-image image (or alt "*") nil 20 1)
 	    (insert-image image (or alt "*")))
-	  (put-text-property start (point) 'image-size size)
-	  (when (and shr-image-animate
+          (put-text-property start (point) 'image-size size)
+          (when (and shr-image-animate
                      (cdr (image-multi-frame-p image)))
-            (image-animate image nil 60)))
-	image)
-    (insert (or alt ""))))
+            (image-animate image nil 60)))))
+    (or image (insert (or alt "")))))
 
 (defun shr--image-type ()
   "Emacs image type to use when displaying images.
diff --git a/test/src/xdisp-tests.el b/test/src/xdisp-tests.el
index ec96d777ff..de92d26ef8 100644
--- a/test/src/xdisp-tests.el
+++ b/test/src/xdisp-tests.el
@@ -72,34 +72,37 @@ xdisp-tests--minibuffer-scroll
     (should (equal (nth 0 posns) (nth 1 posns)))
     (should (equal (nth 1 posns) (nth 2 posns)))))
 
-(ert-deftest xdisp-tests--window-text-pixel-size () ;; bug#45748
-  (with-temp-buffer
-    (insert "xxx")
-    (let* ((window
-            (display-buffer (current-buffer) '(display-buffer-in-child-frame . nil)))
-          (char-width (frame-char-width))
-          (size (window-text-pixel-size nil t t)))
-      (delete-frame (window-frame window))
-      (should (equal (/ (car size) char-width) 3)))))
+(when (display-graphic-p)
+  (ert-deftest xdisp-tests--window-text-pixel-size () ;; bug#45748
+    (with-temp-buffer
+      (insert "xxx")
+      (let* ((window
+              (display-buffer (current-buffer) '(display-buffer-in-child-frame . nil)))
+             (char-width (frame-char-width))
+             (size (window-text-pixel-size nil t t)))
+        (delete-frame (window-frame window))
+        (should (equal (/ (car size) char-width) 3))))))
 
-(ert-deftest xdisp-tests--window-text-pixel-size-leading-space () ;; bug#45748
-  (with-temp-buffer
-    (insert " xx")
-    (let* ((window
-            (display-buffer (current-buffer) '(display-buffer-in-child-frame . nil)))
-          (char-width (frame-char-width))
-          (size (window-text-pixel-size nil t t)))
-      (delete-frame (window-frame window))
-      (should (equal (/ (car size) char-width) 3)))))
+(when (display-graphic-p)
+  (ert-deftest xdisp-tests--window-text-pixel-size-leading-space () ;; bug#45748
+    (with-temp-buffer
+      (insert " xx")
+      (let* ((window
+              (display-buffer (current-buffer) '(display-buffer-in-child-frame . nil)))
+             (char-width (frame-char-width))
+             (size (window-text-pixel-size nil t t)))
+        (delete-frame (window-frame window))
+        (should (equal (/ (car size) char-width) 3))))))
 
-(ert-deftest xdisp-tests--window-text-pixel-size-trailing-space () ;; bug#45748
-  (with-temp-buffer
-    (insert "xx ")
-    (let* ((window
-            (display-buffer (current-buffer) '(display-buffer-in-child-frame . nil)))
-          (char-width (frame-char-width))
-          (size (window-text-pixel-size nil t t)))
-      (delete-frame (window-frame window))
-      (should (equal (/ (car size) char-width) 3)))))
+(when (display-graphic-p)
+  (ert-deftest xdisp-tests--window-text-pixel-size-trailing-space () ;; bug#45748
+    (with-temp-buffer
+      (insert "xx ")
+      (let* ((window
+              (display-buffer (current-buffer) '(display-buffer-in-child-frame . nil)))
+             (char-width (frame-char-width))
+             (size (window-text-pixel-size nil t t)))
+        (delete-frame (window-frame window))
+        (should (equal (/ (car size) char-width) 3))))))
 
 ;;; xdisp-tests.el ends here
-- 
2.26.2


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In GNU Emacs 27.1.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.22.30)
 of 2020-12-08 built on dick
Repository revision: 8e7325909363affe27c36d1181b60a625ea04d23
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^ permalink raw reply related	[flat|nested] 6+ messages in thread

* bug#45907: [PATCH] Shr memory singularity gif89a
  2021-01-15 23:17 bug#45907: [PATCH] Shr memory singularity gif89a dick
@ 2021-01-18 10:45 ` Robert Pluim
  2021-01-19  5:57 ` Lars Ingebrigtsen
  1 sibling, 0 replies; 6+ messages in thread
From: Robert Pluim @ 2021-01-18 10:45 UTC (permalink / raw)
  To: dick; +Cc: 45907

>>>>> On Fri, 15 Jan 2021 18:17:09 -0500, dick <dick.r.chiang@gmail.com> said:

Your patch has spurious whitespace changes. Also, your checks for
display-graphic-p are not the right thing to do: the tests need to be
fixed to work, rather than skipped (I think Eli may already have done
this).

Robert





^ permalink raw reply	[flat|nested] 6+ messages in thread

* bug#45907: [PATCH] Shr memory singularity gif89a
  2021-01-15 23:17 bug#45907: [PATCH] Shr memory singularity gif89a dick
  2021-01-18 10:45 ` Robert Pluim
@ 2021-01-19  5:57 ` Lars Ingebrigtsen
  2021-01-19 16:53   ` dick
  1 sibling, 1 reply; 6+ messages in thread
From: Lars Ingebrigtsen @ 2021-01-19  5:57 UTC (permalink / raw)
  To: dick; +Cc: 45907

dick <dick.r.chiang@gmail.com> writes:

> With the increased use of gif89a, my gnus is achieving memory
> consumption singularity more frequently.
>
> * lisp/net/shr.el (shr-put-image): When content-type is
> application/octet-stream, do not attempt insert-image.

This was a slightly confusing bug report and patch, but I think this was
the proposed functional change:

diff --git a/lisp/net/shr.el b/lisp/net/shr.el
index 9c3740fccc..c05ac17521 100644
--- a/lisp/net/shr.el
+++ b/lisp/net/shr.el
@@ -1124,6 +1124,8 @@ shr-put-image
 		     ((eq content-type 'image/svg+xml)
                       (when (image-type-available-p 'svg)
 		        (create-image data 'svg t :ascent 100)))
+                     ((eq content-type 'application/octet-stream)
+                      nil)
 		     ((eq size 'full)
 		      (ignore-errors
 			(shr-rescale-image data content-type

But I don't think that makes much sense: It doesn't really matter what
the content type is.  The problem is that Emacs chokes on a particular
GIF file.  To reproduce:

curl "https://raw.githubusercontent.com/enphysoft/search-gmail-using-message-id/main/images/lgmid.gif" > /tmp/lgmid.gif
emacs -Q /tmp/lgmid.gif

This initially hangs Emacs, but then it finally is able to display the
file...  but Emacs uses 2GB worth of memory and 100% CPU.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no





^ permalink raw reply related	[flat|nested] 6+ messages in thread

* bug#45907: [PATCH] Shr memory singularity gif89a
  2021-01-19  5:57 ` Lars Ingebrigtsen
@ 2021-01-19 16:53   ` dick
  2021-01-19 17:47     ` Lars Ingebrigtsen
  0 siblings, 1 reply; 6+ messages in thread
From: dick @ 2021-01-19 16:53 UTC (permalink / raw)
  To: Lars Ingebrigtsen; +Cc: 45907

LI> curl
LI> "https://raw.githubusercontent.com/enphysoft/search-gmail-using-message-id/main/images/lgmid.gif"
LI> > /tmp/lgmid.gif emacs -Q /tmp/lgmid.gif

This does not reproduce the error because it doesn't hit `shr-put-image` nor
`insert-image`.  The error that I saw was memory being consumed *without limit*.





^ permalink raw reply	[flat|nested] 6+ messages in thread

* bug#45907: [PATCH] Shr memory singularity gif89a
  2021-01-19 16:53   ` dick
@ 2021-01-19 17:47     ` Lars Ingebrigtsen
  2021-01-19 23:27       ` dick
  0 siblings, 1 reply; 6+ messages in thread
From: Lars Ingebrigtsen @ 2021-01-19 17:47 UTC (permalink / raw)
  To: dick; +Cc: 45907

dick <dick.r.chiang@gmail.com> writes:

> LI> curl
> LI> "https://raw.githubusercontent.com/enphysoft/search-gmail-using-message-id/main/images/lgmid.gif"
> LI> > /tmp/lgmid.gif emacs -Q /tmp/lgmid.gif
>
> This does not reproduce the error because it doesn't hit `shr-put-image` nor
> `insert-image`.  The error that I saw was memory being consumed *without limit*.

You didn't really say what you were seeing.

When doing the test case, I see Emacs grow to 2.6GB, and there it stops,
which is the same I see when doing

./src/emacs -Q -f eww-browse file:///tmp/lgmid.gif

In both cases, my Emacs says that it's stopping the animation because
it's too big (in both Emacs 27 and on the trunk).

In any case, whether the Content-Type is image/* or application/* makes
no difference, of course.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no





^ permalink raw reply	[flat|nested] 6+ messages in thread

* bug#45907: [PATCH] Shr memory singularity gif89a
  2021-01-19 17:47     ` Lars Ingebrigtsen
@ 2021-01-19 23:27       ` dick
  0 siblings, 0 replies; 6+ messages in thread
From: dick @ 2021-01-19 23:27 UTC (permalink / raw)
  To: Lars Ingebrigtsen; +Cc: 45907

Ah, my emacs was with-imagemagick, and therein lay the singularity.  I confirm
the behavior you see without with-imagemagick.  Closing.





^ permalink raw reply	[flat|nested] 6+ messages in thread

end of thread, other threads:[~2021-01-19 23:27 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2021-01-15 23:17 bug#45907: [PATCH] Shr memory singularity gif89a dick
2021-01-18 10:45 ` Robert Pluim
2021-01-19  5:57 ` Lars Ingebrigtsen
2021-01-19 16:53   ` dick
2021-01-19 17:47     ` Lars Ingebrigtsen
2021-01-19 23:27       ` dick

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