When run in 32-bit mode, Firefox (34 branch and up) always crashes on Yosemite whenever behind-window vibrancy is used. You can make this happen by viewing the bookmarks or history sidebar. I tested in today's mozilla-central nightly, and haven't yet confirmed the regression range. But I'm almost certain about it. STR: 1) Ctrl-click (or right-click) on the Firefox distro and choose Get Info. 2) Make sure Open in 32-bit mode is checked. 3) Run Firefox 3) Choose View : Sidebar : Bookmarks or View : Sidebar : History. 4) Crash.
Crash Signature: [@ libobjc.A.dylib@0x50df ]
Do you want this, Markus, or shall I take it?
After this line: > Class EffectViewClass = objc_allocateClassPair(NSVisualEffectViewClass, "EffectView", 0); sending any message to EffectViewClass (like "alloc") results in a crash. This seems to happen regardless of whether we subclass NSVisualEffectView or any other class. In fact, these two lines alone cause a crash in 32 bit mode: > Class CreatedClass = objc_allocateClassPair([NSObject class], "MyClassName", 0); > [CreatedClass alloc]; It looks like objc_allocateClassPair just doesn't work on 32 bit. A web search didn't turn up any useful information about this problem, apart from this: https://github.com/CodaFi/C-Macs/issues/1 which doesn't really help. And we can't use class_createInstance because that doesn't allow us to subclass NSVisualEffectView. So let's just turn off vibrancy in 32 bit mode.
Assignee: nobody → mstange
Status: NEW → ASSIGNED
Attachment #8508704 - Flags: review?(smichaud)
Comment on attachment 8508704 [details] [diff] [review] disable vibrancy in 32 bit mode This is fine with me. The only thing we still really need 32-bit mode for is some 32-bit only plugins (notably Silverlight). Otherwise we don't want it to crash, of course. But I don't think non-plugin 32-bit mode deserves the same level of support as non-plugin 64-bit mode -- especially if it would require a lot of work, as here.
Attachment #8508704 - Flags: review?(smichaud) → review+
Comment on attachment 8508704 [details] [diff] [review] disable vibrancy in 32 bit mode Markus, are you going to land this? :-)
Comment on attachment 8508704 [details] [diff] [review] disable vibrancy in 32 bit mode Approval Request Comment [Feature/regressing bug #]: bug 1051522 [User impact if declined]: crash on 10.10 in 32-bit mode [Describe test coverage new/current, TBPL]: none, running the browser in 32-bit mode is not really a supported configuration [Risks and why]: very low risk, safe patch [String/UUID change made/needed]: none
Status: ASSIGNED → RESOLVED
Last Resolved: 5 years ago
Resolution: --- → FIXED
Target Milestone: --- → mozilla36
Comment on attachment 8508704 [details] [diff] [review] disable vibrancy in 32 bit mode Beta+ Aurora+
Verified as fixed using: FF 34.04 FF 35 Aurora Build Id: 20141028004002 FF 36 Nightly Build Id: 20141028030204 OS: Mac Os X 10.10
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