[Webkit-unassigned] [Bug 85076] New: Segmentation fault on ARMv7 on javascript-heavy pages

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=85076

           Summary: Segmentation fault on ARMv7 on javascript-heavy pages
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: dsd at laptop.org


Created an attachment (id=139221)
 --> (https://bugs.webkit.org/attachment.cgi?id=139221&action=review)
Attempted gdb diagnostics

OLPC is moving from xulrunner to webkit. This is working great on our x86 laptops, but not on our latest ("XO-1.75") ARMv7 laptop.

We are running Fedora 17 with webkitgtk-1.8.1 (GTK3).

On the ARM platform, loading a javascript-heavy webpage causes a crash. Reproduced in Epiphany and OLPC's own "Browse activity" for the Sugar desktop. Reproduces very easily - loading gmail or Google Docs will cause an instant crash most of the time.

Unfortunately gdb is not helpful with the crash. With all relevant debuginfo packages installed:

(gdb) bt
#0  0x00000024 in ?? ()
#1  0x49f0eaf4 in ?? ()
#2  0x49f0eaf4 in ?? ()

The crash can't be reproduced on identical configuration on x86.

WebKit was built with these options:

WebKit was configured with the following options:
Build configuration:
 Enable debugging (slow)                                  : no
 Compile with debug symbols (slow)                        : no
 Enable debug features (slow)                             : no
 Enable GCC build optimization                            : yes
 Code coverage support                                    : no
 Unicode backend                                          : icu
 Font backend                                             : freetype
 Optimized memory allocator                               : yes
 Accelerated Compositing                                  : no
Features:
 WebGL                                                    : yes
 Blob support                                             : yes
 DOM mutation observer support                            : no
 DeviceOrientation support                                : no
 Directory upload                                         : no
 Fast Mobile Scrolling                                    : no
 JIT compilation                                          : yes
 Filters support                                          : yes
 Geolocation support                                      : yes
 JavaScript debugger/profiler support                     : yes
 Gamepad support                                          : no
 MathML support                                           : yes
 Media source                                             : no
 Media statistics                                         : no
 MHTML support                                            : no
 HTML5 channel messaging support                          : yes
 HTML5 meter element support                              : yes
 HTML5 microdata support                                  : no
 Page Visibility API support                              : no
 HTML5 progress element support                           : yes
 HTML5 client-side session and persistent storage support : yes
 SQL client-side database storage support                 : yes
 HTML5 datagrid support                                   : no
 HTML5 data transfer items support                        : no
 HTML5 FileSystem API support                             : no
 Quota API support                                        : no
 HTML5 sandboxed iframe support                           : yes
 HTML5 video element support                              : yes
 HTML5 track element support                              : no
 Fullscreen API support                                   : yes
 Media stream support                                     : no
 Icon database support                                    : yes
 Image resizer support                                    : no
 Link prefetch support                                    : no
 Opcode stats                                             : no
 Shadow DOM support                                       : yes
 SharedWorkers support                                    : yes
 Color input support                                      : no
 Speech input support                                     : no
 SVG support                                              : yes
 SVG fonts support                                        : yes
 Web Audio support                                        : no
 Web Sockets support                                      : yes
 Web Timing support                                       : no
 Web Workers support                                      : yes
 XSLT support                                             : yes
 Spellcheck support                                       : yes
 Animation API                                            : no
 RequestAnimationFrame support                            : yes
 Touch Icon Loading support                               : no
 Register Protocol Handler support                        : no
 WebKit2 support                                          : no
 WebKit2 plugin process                                   : no
GTK+ configuration:
 GTK+ version                                             : 3.0
 GDK target                                               : x11
 Hildon UI extensions                                     : no
 GStreamer version                                        : 0.10
 Introspection support                                    : yes
 Generate documentation                                   : no

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