1570 2011-10-03 07:58:31 +0000 ICU fails if target endian != build host endian 2018-01-25 16:05:23 +0000 1 1 7 Build System, Metadata & Runtime OE-Core graphics unspecified Other ppc RESOLVED FIXED Tested on qemuppc, ask for Gary to have a try. May24, 2012 Low normal Future 1 gary ross.burton jessica.zhang meta.mr.watcher meta.watcher nitin.a.kamble randy.macleod richard.purdie scott.a.garman sgw shane.wang song.liu yi.zhao --- --- Don't know oldest_to_newest 16618 0 gary 2011-10-03 07:58:31 +0000 I'm trying to run the web-webkit browser on my PowerPC system (built using Poky). I've built this on ARM and it runs great, but on PowerPC it fails almost immediately. Following into the failure with GDB, it looks like it's trying to build up a string using a [possibly] wide character iterator. It fails on line 76 of the code below, going through it by hand shows that 'iterator' is NULL. (gdb) dir /local/logopak8347tbga_new/tmp/work/ppc603e-amltd-linux/webkit-gtk-1.5.1+svnr90727-r0 (gdb) l 71 TextBreakIterator* acquireLineBreakIterator(const UChar* string, int length, const AtomicString& locale) 72 { 73 UBreakIterator* iterator = LineBreakIteratorPool::sharedPool().take(locale); 74 75 UErrorCode setTextStatus = U_ZERO_ERROR; 76 ubrk_setText(iterator, string, length, &setTextStatus); 77 if (U_FAILURE(setTextStatus)) { 78 LOG_ERROR("ubrk_setText failed with status %d", setTextStatus); 79 return 0; 80 } (gdb) b 75 Breakpoint 1 at 0xf8a7440: file Source/WebCore/platform/text/TextBreakIteratorICU.cpp, line 75. Any ideas what might be wrong here? Maybe some confusion about wide vs not-wide character representation (I've seen this one a lot, especially on PowerPC systems)? Any clues where to look next? I did note that 'locale' into this function is also NULL. Note: I tried this with the stock Poky master 9d1db6cc928199f8ac4960e8d4648563ef141427 building for qemuppc and running web2 via ssh -X (since qemu doesn't support graphics?) The failure is the same, so this is not something special in my setup. Note 2: it's difficult to get this to fail when running in qemu since it only fails when it's loading and rendering the www.google.co.uk default page. I couldn't figure out how to get my qemu system to be able to access that page over the net, but I ran the same Yocto filesystem on my hardware (this is not a hardware bug) with the same failure. Maybe someone smarter than me can show me how to get qemu to actually access the internet (when the machine that's running qemu is inside a NAT'd zone)? 16637 1 gary 2011-10-04 06:06:59 +0000 Further investigation shows that this is a failure in the ICU library. Webkit is using ICU to help it render strings and the calls to 'ubrk_open()' always return NULL. This is because of how the ICU library is built. It contains some prebuilt tables which are target specific. If the host and target have different endianness (or indeed other layout issues), this fails. I built the ICU library (version 3.6) by hand on a PowerPC host and installed this to my Poky system. Now 'web2' runs fine. Newer versions of ICU supposedly handle this case where the host and target are not the same endianness. However, my experience with version 4.4 in the past showed that the situation was not any better. I'll try the latest 4.8.1 to see if it helps. 16657 2 gary 2011-10-04 08:18:17 +0000 ICU 4.8.1 still fails under these conditions :-( 16721 3 270 gary 2011-10-05 08:10:37 +0000 Created attachment 270 Updated recipe for ICU library Includes PowerPC work around. Actual data file can be found at: http://www.mlbassoc.com/poky/libicudata.so.48.1.gz 17763 4 jessica.zhang 2011-12-20 11:42:53 +0000 Please take some action on the bug, at least accept the bug 20248 5 nitin.a.kamble 2012-04-12 16:26:45 +0000 Gary, There is nothing special about getting to internet from qemu. if you are behind proxies then you will need to setup the proxies inside qemu. Nitin 20249 6 nitin.a.kamble 2012-04-12 16:37:16 +0000 Gary, I see you have a binary file with powerpc work around. Why don't you apply patches for the work around to the recipe in poky? Nitin 20254 7 gary 2012-04-12 17:02:15 +0000 (In reply to comment #6) > Gary, > I see you have a binary file with powerpc work around. Why don't you apply > patches for the work around to the recipe in poky? > > Nitin It's not that simple - the work around is to provide a database library which is in the correct endian format. If you are building this recipe on a little endian machine (most everyone is), the library created is incorrect when used on big endian targets. The ICU build process attempts to get this right, but it's not even close and upstream doesn't seem too interested in making it work :-( 20268 8 nitin.a.kamble 2012-04-12 21:34:37 +0000 Gary, Can you scope out how much work is needed to support correct endian-ness in a cross build? 1. If it is not too much work then support can be added to ICU to swap the bytes for correct endian-ness. 2. If it is too much work, then it can be build with mips qemu emulation, which will be built much slowly but correctly. 3. And also another option is what you have, provide prebuilt library from some url. Nitin 20271 9 gary 2012-04-12 23:39:13 +0000 (In reply to comment #8) > Gary, > Can you scope out how much work is needed to support correct endian-ness in a > cross build? > 1. If it is not too much work then support can be added to ICU to swap the > bytes for correct endian-ness. > 2. If it is too much work, then it can be build with mips qemu emulation, > which will be built much slowly but correctly. > 3. And also another option is what you have, provide prebuilt library from > some url. > > Nitin There is already code for option (1) but it's severely broken and would take a significant amount of time to redo (probably start from scratch) Option (2) would be OK - not sure why you'd choose MIPS instead of PowerPC? I'd hate to have to build a complete MIPS setup when I build for PowerPC, just to solve this issue :-( I prefer option (3) as I already have it working and tested. It only requires updating the library manually when the recipe changes. Given that the OE-core recipe is still at 3.6 (I've tested 4.8.1 here) and that this project changes very rarely, I think this would be the way to go. 20276 10 nitin.a.kamble 2012-04-13 01:41:34 +0000 I meant powerpc in place of mips. (for me mips and ppc are equally foreign, hence the confusion) 20280 11 nitin.a.kamble 2012-04-13 04:51:48 +0000 Gary, the 3rd options is the hardest to get included in the tree though. 20521 12 richard.purdie 2012-04-17 11:39:31 +0000 Its too late to get this into 1.2, targeting to point release. 20722 13 edwin.zhai 2012-04-19 15:20:33 +0000 Gary, I investigated ICU, and found it's not easy to add this feature. But we can configure webkit-gtk to use glib as unicode backend rather than icu as attached patch. Some comments says glib's unicode is incomplete, so can you have a test on your real machine(need change my patch a little bit) when you have time? If it works, we can use it as temporary solution before this feature is added in ICU upstream. 20723 14 491 edwin.zhai 2012-04-19 15:22:06 +0000 Created attachment 491 Fix web2 segfault on ppc configure webkit-gtk to use glib rather than icu as unicode backend to avoid segfault 21541 15 yi.zhao 2012-05-23 10:09:58 +0000 Currently our ppc board mpc8315e-rdb doesn't support X because it does't have any graphics adaptor, so we can not verifiy it on real hardware. But I can reproduce this bug on qemuppc because it supports X now. We need to re-configure the qemu network to make it can access internet: ###### 1. On linux host, enable the ip forwarding: $ echo 1 > /proc/sys/net/ipv4/ip_forward If there is a firewall on the host, we also need to run the following command: $ iptables -t nat -A POSTROUTING -j MASQUERADE 2. Launch the qemuppc image. 3. We need to re-configure the network manually. First, kill the connmand: $ killall connmand $ ifconfig eth0 192.168.7.2 $ ifconfig eth0 up Then add a default gw: $ route add default gw 192.168.7.1 dev eth0 4. Add a nameserver in /etc/resolv.conf 5. Launch the web2 in terminal. Then the brower could access the internet. ######## I built a qemuppc sato-image with the latest master branch(b4c8c74a45e386f99344cf9799eb5294ad6c9e3e). When I access some complicated website, like www.intel.com or www.nvidia.com. There would be a segfault with it. After applying Edwin's patch, the web2 works fine. But there is still some issues, someone has opened a bug 2318 to report it. 21650 16 edwin.zhai 2012-05-28 02:11:32 +0000 (In reply to comment #9) Gary, I have sent you a mail, could you pls. test the attached patch to see if it works? Thanks, Edwin 21677 17 gary 2012-05-28 17:30:47 +0000 Yes, this change does work (tested with the attached patch). Perhaps the changes in the patch should just be used for all architectures? No need to mess with the ICU package (broken) when pango can work just as well. 21682 18 edwin.zhai 2012-05-29 00:28:02 +0000 (In reply to comment #17) > Yes, this change does work (tested with the attached patch). > > Perhaps the changes in the patch should just be used for all architectures? > No need to mess with the ICU package (broken) when pango can work just as > well. I'm not sure if glib unicode works for all architectures. Furthermore, readme in glib said its unicode implementation is incomplete at this point. So I'd like to use this work around only for ppc and turn to ICU if they fix this issue, or glib if it become more popular. Do you agree? Is your machine config in oe-core? Or you need something like bbappend in your layer. Thanks, Edwin 21688 19 gary 2012-05-29 10:56:39 +0000 (In reply to comment #18) > (In reply to comment #17) > > Yes, this change does work (tested with the attached patch). > > > > Perhaps the changes in the patch should just be used for all architectures? > > No need to mess with the ICU package (broken) when pango can work just as > > well. > > I'm not sure if glib unicode works for all architectures. Furthermore, > readme in glib said its unicode implementation is incomplete at this point. > So I'd like to use this work around only for ppc and turn to ICU if they fix > this issue, or glib if it become more popular. Do you agree? Fair enough - for machines that share the same endian-ness as the build host (typically little endian machines) this is acceptable. What I don't like about it is that the program will be built differently, hence behave differently, on different target architectures (seldom a correct choice) > > Is your machine config in oe-core? Or you need something like bbappend in > your layer. No, my machine is not public. At this point, I just have edited the main recipe directly (matching your request). 21779 20 edwin.zhai 2012-06-01 01:15:30 +0000 Patch to use glib as unicode backend is already in master, so there is no crash from web browser on ppc. http://git.yoctoproject.org/cgit/cgit.cgi/poky/commit/?id=348da93e283b2b8454fd9cde80d4b17378e2a168 For the ICU bug, we need keep tracking the upstream status for a fix. I'd suggest postpone it to a later milestone. Thanks, Edwin 22013 21 edwin.zhai 2012-06-11 23:38:44 +0000 We have a work around to fix the browser crash on ppc system, and wait for ICU's community to fix this cross-compile issue. Postpone it to 1.4. 22039 22 569 gary 2012-06-12 11:43:19 +0000 Created attachment 569 Extend fix for all PowerPC targets 26619 23 sgw 2012-10-15 21:48:56 +0000 Gary's patch was applied a while ago, and Webkit is working on qemuppc. We are still waiting for the upstream to provide a proper patch, there are various cross-compilation and endianness bugs at http://bugs.icu-project.org/trac, I am not exactly sure if gary or edwin actually filed bugs. I also agree with Gary, we might make full build use pango for all arches and see what happens, I will test this. 56367 24 ross.burton 2015-11-10 17:27:09 +0000 A relevant upstream bug is http://bugs.icu-project.org/trac/ticket/11758. Open for 57 months. 79221 25 randy.macleod 2018-01-25 16:05:23 +0000 commit 77d1b9cda69d09cd7d3c8174ef14b4ee10e5efb6 Author: Yi Zhao <yi.zhao@windriver.com> Date: Tue Dec 5 09:17:04 2017 +0800 icu: fix libicudata corruption on big endian system 270 2011-10-05 08:10:37 +0000 2011-10-05 08:10:37 +0000 Updated recipe for ICU library icu_4.8.1.bb application/octet-stream 2211 gary REVTQ1JJUFRJT04gPSAiVGhlIEludGVybmF0aW9uYWwgQ29tcG9uZW50IGZvciBVbmljb2RlIChJ Q1UpIGlzIGEgbWF0dXJlLCBwb3J0YWJsZSBzZXQgb2YgQy9DKysgYW5kIEphdmEgbGlicmFyaWVz IGZvciBVbmljb2RlIHN1cHBvcnQsIHNvZnR3YXJlIGludGVybmF0aW9uYWxpemF0aW9uIChJMThO KSBhbmQgZ2xvYmFsaXphdGlvbiAoRzExTiksIGdpdmluZyBhcHBsaWNhdGlvbnMgdGhlIHNhbWUg cmVzdWx0cyBvbiBhbGwgcGxhdGZvcm1zLiIKSE9NRVBBR0UgPSAiaHR0cDovL3dodHRwOi8vc2l0 ZS5pY3UtcHJvamVjdC5vcmcvIgoKU1JDX1VSSSA9ICJodHRwOi8vZG93bmxvYWQuaWN1LXByb2pl Y3Qub3JnL2ZpbGVzL2ljdTRjLzQuOC4xL2ljdTRjLTRfOF8xLXNyYy50Z3o7bmFtZT1pY3VzcmMg XAogICAgICAgICAgIgpTUkNfVVJJW2ljdXNyYy5tZDVzdW1dID0gImFmMzZmNjM1MjcxYTIzOWQ3 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