1841445 - Crash in [@ libsystem_kernel.dylib@0x2972]

Status: RESOLVED DUPLICATE of bug 1801419

(Core :: Widget: Cocoa, defect)

Description

[alex_mayorga]

Crash report: https://crash-stats.mozilla.org/report/index/354ccb5a-8673-40b1-8d8f-f18c70230629

Reason: EXC_BAD_ACCESS / KERN_MEMORY_ERROR

Top 10 frames of crashing thread:

0  libsystem_kernel.dylib  libsystem_kernel.dylib@0x2972  
1  IOKit  IOKit@0x5c01  
2  SidecarCore  SidecarCore@0x2b9f  
3  SidecarCore  SidecarCore@0x16fc6  
4  SidecarCore  SidecarCore@0x16ca6  
5  XUL  PinSidecarCoreTextCStringSections  widget/cocoa/nsAppShell.mm:803
5  XUL  nsAppShell::Run  widget/cocoa/nsAppShell.mm:829
6  XUL  nsAppStartup::Run  toolkit/components/startup/nsAppStartup.cpp:295
7  XUL  XREMain::XRE_mainRun  toolkit/xre/nsAppRunner.cpp:5671
8  XUL  XREMain::XRE_main  toolkit/xre/nsAppRunner.cpp:5872

¡Hola y'all!

This is top 20 crash over at
https://crash-stats.mozilla.org/topcrashers/?product=Firefox&version=116.0a1
as of today.

Filing this FWIW.

¡Gracias!
Alex

Comment 1

[Lee Salzman [:lsalzman]]

Stephen, it looks like these crashes started spiking when 1801419 landed. The crash stack would also seem to implicate it.

Comment 2

[Steven Michaud [:smichaud] (Retired)]

This isn't really a regression. The same crashes would have happened without my patch, but in a different place in the Mozilla code. Also, the crashes [@ libsystem_kernel.dylib@0x2972] are same as those [@ mig_strncpy_zerofill ]. The non-symbolicated signature is for a macOS 13.5.0 beta. I only scrape symbols for release versions and betas of the next major release (currently macOS 14).

Here's a search, copied from bug 1801419 comment #56 and updated, which captures all that bug's crashes for the last month (in builds with my second patch), including those with non-symbolicated signatures:

https://crash-stats.mozilla.org/search/?proto_signature=~PinSidecarCoreTextCStringSections&platform=Mac%20OS%20X&date=%3E%3D2023-06-03T19%3A26%3A00.000Z&date=%3C2023-07-03T19%3A26%3A00.000Z&_facets=signature&_facets=platform_version&_sort=-date&_columns=date&_columns=signature&_columns=product&_columns=version&_columns=build_id&_columns=platform#facet-signature

And here's these stats with the non-symbolicated signatures folded in with the symbolicated ones. Compare them to those from bug 1801419 comment #58.

[@ +[NSString stringWithCString:encoding:] ]  200
[@ mig_strncpy_zerofill ]                      39
[@ _mapStrHash ]                               12
[@ prepareMethodLists ]                         7

They do seem higher, but that has nothing to do with this bug report.