[LLVMdev] r102300 breaks Obj-C codegen on Darwin x86

[Chris Lattner]

Thanks for the head's up.  It looks like metadata is getting overaligned, making the runtime cranky.  I'll revert it and fix the PR another way, thanks again!

-Chris

On Apr 26, 2010, at 1:13 AM, Jean-Daniel Dupas wrote:

> After commit 102300, any obj-c software compiled with clang crashes at launch time with the following stack trace.
> Reverting this specific commit fix the issue.
> 
> ------------------------------------------------------------------------------------------------
> Date/Time:       2010-04-26 10:07:01.630 +0200
> OS Version:      Mac OS X 10.6.3 (10D573)
> Report Version:  6
> 
> Interval Since Last Report:          333376 sec
> Crashes Since Last Report:           5
> Per-App Crashes Since Last Report:   1
> Anonymous UUID:                      C67EBC9D-4A73-4DA7-B067-E5006618C178
> 
> Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
> Exception Codes: KERN_INVALID_ADDRESS at 0x0000000074696e55
> Crashed Thread:  0  Dispatch queue: com.apple.main-thread
> 
> Thread 0 Crashed:  Dispatch queue: com.apple.main-thread
> 0   libobjc.A.dylib               	0x913d3348 _objc_search_builtins + 299
> 1   libobjc.A.dylib               	0x913d313e __sel_registerName + 44
> 2   libobjc.A.dylib               	0x913d6269 map_method_descs + 47
> 3   libobjc.A.dylib               	0x913d4094 _read_images + 2116
> 4   libobjc.A.dylib               	0x913e9933 map_images_nolock + 1545
> 5   libobjc.A.dylib               	0x913d30d9 map_images + 72
> 6   dyld                          	0x8fe03ecc dyld::notifyBatchPartial(dyld_image_states, bool, char const* (*)(dyld_image_states, unsigned int, dyld_image_info const*)) + 698
> 7   dyld                          	0x8fe04359 dyld::registerImageStateBatchChangeHandler(dyld_image_states, char const* (*)(dyld_image_states, unsigned int, dyld_image_info const*)) + 452
> 8   libSystem.B.dylib             	0x958d3892 dyld_register_image_state_change_handler + 98
> 9   libobjc.A.dylib               	0x913d306d _objc_init + 77
> 10  dyld                          	0x8fe0ed6d ImageLoaderMachO::doModInitFunctions(ImageLoader::LinkContext const&) + 235
> 11  dyld                          	0x8fe0d31e ImageLoader::recursiveInitialization(ImageLoader::LinkContext const&, unsigned int) + 246
> 12  dyld                          	0x8fe0d2c2 ImageLoader::recursiveInitialization(ImageLoader::LinkContext const&, unsigned int) + 154
> 13  dyld                          	0x8fe0d2c2 ImageLoader::recursiveInitialization(ImageLoader::LinkContext const&, unsigned int) + 154
> 14  dyld                          	0x8fe0d2c2 ImageLoader::recursiveInitialization(ImageLoader::LinkContext const&, unsigned int) + 154
> 15  dyld                          	0x8fe0d3d1 ImageLoader::runInitializers(ImageLoader::LinkContext const&) + 61
> 16  dyld                          	0x8fe024a9 dyld::initializeMainExecutable() + 134
> 17  dyld                          	0x8fe07950 dyld::_main(macho_header const*, unsigned long, int, char const**, char const**, char const**) + 4189
> 18  dyld                          	0x8fe018b1 dyldbootstrap::start(macho_header const*, int, char const**, long) + 779
> 19  dyld                          	0x8fe01057 _dyld_start + 39
> 
> 
> 
> -- Jean-Daniel
> 
> 
> 
> 
> 
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