search for: objc_class_name_

...ad=/System/Library/Frameworks/Foundation.framework/Foundation > SimpleFoundation.bc > > Segmentation fault > > $ lli -force-interpreter > -load=/System/Library/Frameworks/Foundation.framework/Foundation > SimpleFoundation.bc > > Could not resolve external global address: .objc_class_name_NSAutoreleasePool > Abort trap > > $ nm /System/Library/Frameworks/Foundation.framework/Foundation | > grep .objc_class_name_NSAutoreleasePool > > 00000000 A .objc_class_name_NSAutoreleasePool Ok, as you figured out, you do need to tell lli explicitly what frameworks to load. On...

...ndation.exe[2535] Hello, World! $ lli -load=/System/Library/Frameworks/Foundation.framework/Foundation SimpleFoundation.bc Segmentation fault $ lli -force-interpreter -load=/System/Library/Frameworks/Foundation.framework/Foundation SimpleFoundation.bc Could not resolve external global address: .objc_class_name_NSAutoreleasePool Abort trap $ nm /System/Library/Frameworks/Foundation.framework/Foundation | grep .objc_class_name_NSAutoreleasePool 00000000 A .objc_class_name_NSAutoreleasePool It seems that when linked by GCC the symbols are found without any trouble however when using lli, the symbols arn...

...NAME_ = private unnamed_addr constant [8 x i8] c"test1::\00", section "__TEXT,__cstring,cstring_literals", align 1 @OBJC_METH_VAR_TYPE_ = private unnamed_addr constant [16 x i8] c"v32 at 0:8^v16^v24\00", section "__TEXT,__cstring,cstring_literals", align 1 @OBJC_CLASS_NAME_ = private unnamed_addr constant [4 x i8] c"Foo\00", section "__TEXT,__cstring,cstring_literals", align 1 @OBJC_CLASS_METHODS_Foo = private global { i32, i8*, [1 x %struct._mulle_objc_method] } { i32 1, i8* null, [1 x %struct._mulle_objc_method] [%struct._mulle_objc_method { i...

> -----Original Message----- > From: llvm-dev [mailto:llvm-dev-bounces at lists.llvm.org] On Behalf Of Tim > Northover via llvm-dev > Sent: Wednesday, July 25, 2018 3:07 AM > To: Nat! > Cc: LLVM Developers Mailing List > Subject: Re: [llvm-dev] A question to the DWARF experts on symbol > indirection > > Hi Nat!, > > On Wed, 25 Jul 2018 at 01:21, Nat! via

..., > Once you have that, you are hitting another problem. Specifically, > the JIT::getPointerToNamedFunction method in > lib/ExecutionEngine/JIT/Intercept.cpp just does a dlsym on missing > symbols. If dlsym returns null, you get the error message. > > The problem here is that .objc_class_name_* are special symbols that > are used by the objc linker support and they have magic meaning. This > itself isn't a problem, the problem is that they are absolute symbols > (which is why nm prints 'A' for the symbol) and their absolute value > is 0. When dlsym correctly ret...