I debugged the lldb/test/lang/objc/foundation binary:
% cd lldb/test/lang/objc/foundation
% make
% lldb a.out
(lldb) b main.m:70
(lldb) r
69 NSString *str = [NSString stringWithFormat:@"Hello from '%s'",
program];
-> 70 NSLog(@"NSString instance: %@", str);
71 printf("str = '%s'\n", [str cStringUsingEncoding: [NSString
defaultCStringEncoding]]);
72 printf("[str length] = %zu\n", (size_t)[str length]);
73 printf("[str description] = %s\n", [[str description] UTF8String]);
(lldb) script v = lldb.frame.FindVariable("str")
(lldb) script print v
(NSString *) str = 0x0000000100200380 @"Hello from
'/Volumes/work/gclayton/Documents/src/lldb/trunk/test/lang/objc/foundation/a.out'"
(lldb) script print v.GetType().GetTypeClass()
2048
(lldb) p/x 2048
(int) $2 = 0x00000800
This is eTypeClassObjCObjectPointer as expected. If you dereference the item:
(lldb) script vd = v.Dereference()
(lldb) script print vd.GetType().GetTypeClass()
1024
(lldb) p/x 1024
(int) $4 = 0x00000400
This is eTypeClassObjCInterface as expected.
> On Jan 19, 2015, at 6:58 AM, Carlo Kok <c...@remobjects.com> wrote:
>
> After updating lldb (and clang/llvm) to latest I noticed that I get back a
> different value for an NSString* than I used to, I used to get:
>
>
> eTypeClassObjCObjectPointer
> now I get :
> eTypeClassObjCInterface
>
>
> Also the object description property returns null because it doesn't consider
> eTypeClassObjCInterface to be a pointer. I looked at the generated debug info
> which looks fine (and the system lldb on osx works fine too):
>
>
> 0x00000159: TAG_variable [7]
> AT_location( fbreg +120 )
> AT_name( "qwert" )
> AT_decl_file(
> "c:\projects\oxygene\testcases\work/issuedebugsilver_1.pas" )
> AT_decl_line( 8 )
> AT_type( {0x00000298} ( NSString* ) )
>
>
> 0x00000298: TAG_pointer_type [9]
> AT_type( {0x0000029d} ( NSString ) )
>
> 0x0000029d: TAG_structure_type [10] *
> AT_name( "NSString" )
> AT_byte_size( 0x08 )
> AT_APPLE_runtime_class( 0x10 )
>
> 0x000002a4: TAG_inheritance [11]
> AT_type( {0x000002ab} ( NSObject ) )
> AT_data_member_location( 0x00 )
>
> 0x000002aa: NULL
>
> Am i missing something obvious, or is there something broken in lldb?
>
> --
> Carlo Kok
> <dwarf.txt>_______________________________________________
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