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problems with very long alt text

by corvid＠lavabit.com

I wrote: > furaisanjin wrote: > > 2011/8/26 corvid <corvid(a)lavabit.com>: > > > I just tried running from my older slackware-13.1 partition and there > > > was no memory-eating! > > > > I don't have any issue on FreeBSD 8.2. it sounds like particular linux > > libc or kernel issue. > > Jorge: Do you use the Intel x.org driver as well? It is notoriously and > chronically buggy, despite(?) being written by Intel guys, and maybe > that's it. Tried the vesa driver, and dillo worked happily.

Aug. 26, 2011

problems with very long alt text

by corvid＠lavabit.com

furaisanjin wrote: > 2011/8/26 corvid <corvid(a)lavabit.com>: > > I just tried running from my older slackware-13.1 partition and there > > was no memory-eating! > > I don't have any issue on FreeBSD 8.2. it sounds like particular linux > libc or kernel issue. Jorge: Do you use the Intel x.org driver as well? It is notoriously and chronically buggy, despite(?) being written by Intel guys, and maybe that's it.

Aug. 26, 2011

problems with very long alt text

by furaisanjin＠gmail.com

2011/8/26 corvid <corvid(a)lavabit.com>: > I just tried running from my older slackware-13.1 partition and there > was no memory-eating! I don't have any issue on FreeBSD 8.2. it sounds like particular linux libc or kernel issue.

Aug. 26, 2011

problems with very long alt text

by corvid＠lavabit.com

Johannes wrote: > On Thu, Aug 25, 2011 at 08:03:05PM +0000, corvid wrote: > > Jorge wrote: > > > On Thu, Aug 25, 2011 at 02:36:56PM -0300, Jorge Arellano Cid wrote: > > > > On Thu, Aug 25, 2011 at 05:15:00PM +0000, corvid wrote: > > > > > Jorge wrote: > > > > > > On Thu, Aug 25, 2011 at 01:53:32AM +0000, corvid wrote: > > > > > > > > > > > > > > With remote stylesheets off and images off, opening > > > > > > > http://www.dillo.org/test/long_alt_text.html > > > > > > > and dragging the horizontal scrollbar left and right > > > > > > > for a little while will make my machine suddenly start > > > > > > > to page madly. > > > > > > > > > > > > Whoooooohooooo! > > > > > > > > > > > > Good catch: I got an instantaneous X server crash here. > > > > > > > > > > > > Will look into it. > > > > > > > > > > With XFT disabled, this page doesn't give me any memory difficulties. > > > > > > > > *it surprises me* > > > > > > > > I've found this: > > > > > > > > * fl_width() returns OK when called by FltkPlatform::textWidth() > > > > * dillo-2.2.1 also crashes my X server. > > > > > > > > With this little data I tend to think there's a bug in Dillo. > > > > Maybe a huge allocation request... > > > > > > * There's no need to disable CSS nor images here to have a > > > crash. > > > > > > To discard an utf8 kill-sequence, I changed the testcase into a > > > 1106 'a' character repetition (attached). After applying the > > > attached debug-patch, it crashes consistently [1] with max_c=734 > > > but not with max_c=733. I see the expected memory usage with > > > max_c=733 . > > > > > > Is this also true in your machine? > > > > With 733, I scroll back and forth, and mem used in the Mem line in > > top goes up, up, up, while nothing out of the ordinary happens to dillo > > or X, and the paging begins, and it takes a minute or so to notice the > > ctrl-Q. A MSG() in drawSimpleWrappedText() says "width 5864 height 17", > > which adds to the evidence that it may not be a 16-bit overflow. > > > > 733 vs 734 makes no difference for me. > > Maybe it has to do with MAXBUF in fl_draw.cxx? I just tried running from my older slackware-13.1 partition and there was no memory-eating! Same dillo, same fltk, but older kernel and libs. (It still wraps my original example onto four lines instead of looking nice, but I believe I did see something one day in fltk's wrapping that breaks at ~1k bytes or glyphs or something.)

Aug. 25, 2011

problems with very long alt text

by jcid＠dillo.org

On Thu, Aug 25, 2011 at 08:03:05PM +0000, corvid wrote: > Jorge wrote: > > On Thu, Aug 25, 2011 at 02:36:56PM -0300, Jorge Arellano Cid wrote: > > > On Thu, Aug 25, 2011 at 05:15:00PM +0000, corvid wrote: > > > > Jorge wrote: > > > > > On Thu, Aug 25, 2011 at 01:53:32AM +0000, corvid wrote: > > > > > > > > > > > > With remote stylesheets off and images off, opening > > > > > > http://www.dillo.org/test/long_alt_text.html > > > > > > and dragging the horizontal scrollbar left and right > > > > > > for a little while will make my machine suddenly start > > > > > > to page madly. > > > > > > > > > > Whoooooohooooo! > > > > > > > > > > Good catch: I got an instantaneous X server crash here. > > > > > > > > > > Will look into it. > > > > > > > > With XFT disabled, this page doesn't give me any memory difficulties. > > > > > > *it surprises me* > > > > > > I've found this: > > > > > > * fl_width() returns OK when called by FltkPlatform::textWidth() > > > * dillo-2.2.1 also crashes my X server. > > > > > > With this little data I tend to think there's a bug in Dillo. > > > Maybe a huge allocation request... > > > > * There's no need to disable CSS nor images here to have a > > crash. > > > > To discard an utf8 kill-sequence, I changed the testcase into a > > 1106 'a' character repetition (attached). After applying the > > attached debug-patch, it crashes consistently [1] with max_c=734 > > but not with max_c=733. I see the expected memory usage with > > max_c=733 . > > > > Is this also true in your machine? > > With 733, I scroll back and forth, and mem used in the Mem line in > top goes up, up, up, while nothing out of the ordinary happens to dillo > or X, and the paging begins, and it takes a minute or so to notice the > ctrl-Q. Here memory keeps frozen while scrolling back and forth. > A MSG() in drawSimpleWrappedText() says "width 5864 height 17", > which adds to the evidence that it may not be a 16-bit overflow. > > 733 vs 734 makes no difference for me. Here, 733 has altTextWidht=8063 // works OK 734 has altTextWidht=8074 // crashes -- Cheers Jorge.-

Aug. 25, 2011

problems with very long alt text

by Johannes.Hofmann＠gmx.de

On Thu, Aug 25, 2011 at 08:03:05PM +0000, corvid wrote: > Jorge wrote: > > On Thu, Aug 25, 2011 at 02:36:56PM -0300, Jorge Arellano Cid wrote: > > > On Thu, Aug 25, 2011 at 05:15:00PM +0000, corvid wrote: > > > > Jorge wrote: > > > > > On Thu, Aug 25, 2011 at 01:53:32AM +0000, corvid wrote: > > > > > > > > > > > > With remote stylesheets off and images off, opening > > > > > > http://www.dillo.org/test/long_alt_text.html > > > > > > and dragging the horizontal scrollbar left and right > > > > > > for a little while will make my machine suddenly start > > > > > > to page madly. > > > > > > > > > > Whoooooohooooo! > > > > > > > > > > Good catch: I got an instantaneous X server crash here. > > > > > > > > > > Will look into it. > > > > > > > > With XFT disabled, this page doesn't give me any memory difficulties. > > > > > > *it surprises me* > > > > > > I've found this: > > > > > > * fl_width() returns OK when called by FltkPlatform::textWidth() > > > * dillo-2.2.1 also crashes my X server. > > > > > > With this little data I tend to think there's a bug in Dillo. > > > Maybe a huge allocation request... > > > > * There's no need to disable CSS nor images here to have a > > crash. > > > > To discard an utf8 kill-sequence, I changed the testcase into a > > 1106 'a' character repetition (attached). After applying the > > attached debug-patch, it crashes consistently [1] with max_c=734 > > but not with max_c=733. I see the expected memory usage with > > max_c=733 . > > > > Is this also true in your machine? > > With 733, I scroll back and forth, and mem used in the Mem line in > top goes up, up, up, while nothing out of the ordinary happens to dillo > or X, and the paging begins, and it takes a minute or so to notice the > ctrl-Q. A MSG() in drawSimpleWrappedText() says "width 5864 height 17", > which adds to the evidence that it may not be a 16-bit overflow. > > 733 vs 734 makes no difference for me. Maybe it has to do with MAXBUF in fl_draw.cxx?

Aug. 25, 2011

problems with very long alt text

by corvid＠lavabit.com

Jorge wrote: > On Thu, Aug 25, 2011 at 02:36:56PM -0300, Jorge Arellano Cid wrote: > > On Thu, Aug 25, 2011 at 05:15:00PM +0000, corvid wrote: > > > Jorge wrote: > > > > On Thu, Aug 25, 2011 at 01:53:32AM +0000, corvid wrote: > > > > > > > > > > With remote stylesheets off and images off, opening > > > > > http://www.dillo.org/test/long_alt_text.html > > > > > and dragging the horizontal scrollbar left and right > > > > > for a little while will make my machine suddenly start > > > > > to page madly. > > > > > > > > Whoooooohooooo! > > > > > > > > Good catch: I got an instantaneous X server crash here. > > > > > > > > Will look into it. > > > > > > With XFT disabled, this page doesn't give me any memory difficulties. > > > > *it surprises me* > > > > I've found this: > > > > * fl_width() returns OK when called by FltkPlatform::textWidth() > > * dillo-2.2.1 also crashes my X server. > > > > With this little data I tend to think there's a bug in Dillo. > > Maybe a huge allocation request... > > * There's no need to disable CSS nor images here to have a > crash. > > To discard an utf8 kill-sequence, I changed the testcase into a > 1106 'a' character repetition (attached). After applying the > attached debug-patch, it crashes consistently [1] with max_c=734 > but not with max_c=733. I see the expected memory usage with > max_c=733 . > > Is this also true in your machine? With 733, I scroll back and forth, and mem used in the Mem line in top goes up, up, up, while nothing out of the ordinary happens to dillo or X, and the paging begins, and it takes a minute or so to notice the ctrl-Q. A MSG() in drawSimpleWrappedText() says "width 5864 height 17", which adds to the evidence that it may not be a 16-bit overflow. 733 vs 734 makes no difference for me.

Aug. 25, 2011

problems with very long alt text

by jcid＠dillo.org

On Thu, Aug 25, 2011 at 02:36:56PM -0300, Jorge Arellano Cid wrote: > On Thu, Aug 25, 2011 at 05:15:00PM +0000, corvid wrote: > > Jorge wrote: > > > On Thu, Aug 25, 2011 at 01:53:32AM +0000, corvid wrote: > > > > > > > > With remote stylesheets off and images off, opening > > > > http://www.dillo.org/test/long_alt_text.html > > > > and dragging the horizontal scrollbar left and right > > > > for a little while will make my machine suddenly start > > > > to page madly. > > > > > > Whoooooohooooo! > > > > > > Good catch: I got an instantaneous X server crash here. > > > > > > Will look into it. > > > > With XFT disabled, this page doesn't give me any memory difficulties. > > *it surprises me* > > I've found this: > > * fl_width() returns OK when called by FltkPlatform::textWidth() > * dillo-2.2.1 also crashes my X server. > > With this little data I tend to think there's a bug in Dillo. > Maybe a huge allocation request... * There's no need to disable CSS nor images here to have a crash. To discard an utf8 kill-sequence, I changed the testcase into a 1106 'a' character repetition (attached). After applying the attached debug-patch, it crashes consistently [1] with max_c=734 but not with max_c=733. I see the expected memory usage with max_c=733 . Is this also true in your machine? *puzzled* [1] Before and after rebooting the machine. -- Cheers Jorge.-

Aug. 25, 2011

problems with very long alt text

by jcid＠dillo.org

On Thu, Aug 25, 2011 at 05:15:00PM +0000, corvid wrote: > Jorge wrote: > > On Thu, Aug 25, 2011 at 01:53:32AM +0000, corvid wrote: > > > > > > With remote stylesheets off and images off, opening > > > http://www.dillo.org/test/long_alt_text.html > > > and dragging the horizontal scrollbar left and right > > > for a little while will make my machine suddenly start > > > to page madly. > > > > Whoooooohooooo! > > > > Good catch: I got an instantaneous X server crash here. > > > > Will look into it. > > With XFT disabled, this page doesn't give me any memory difficulties. *it surprises me* I've found this: * fl_width() returns OK when called by FltkPlatform::textWidth() * dillo-2.2.1 also crashes my X server. With this little data I tend to think there's a bug in Dillo. Maybe a huge allocation request... -- Cheers Jorge.-

Aug. 25, 2011

problems with very long alt text

by corvid＠lavabit.com

Jorge wrote: > On Thu, Aug 25, 2011 at 01:53:32AM +0000, corvid wrote: > > > > With remote stylesheets off and images off, opening > > http://www.dillo.org/test/long_alt_text.html > > and dragging the horizontal scrollbar left and right > > for a little while will make my machine suddenly start > > to page madly. > > Whoooooohooooo! > > Good catch: I got an instantaneous X server crash here. > > Will look into it. With XFT disabled, this page doesn't give me any memory difficulties.

Aug. 25, 2011