I agree with Jim in that it is nice to know when a compiler told us line 0, 
versus "invalid info" where UINT32_MAX is the value. I would vote to leave 
things as is unless you have a convincing argument otherwise.


On Mar 14, 2014, at 11:21 AM, jing...@apple.com wrote:

> lldb uses LLDB_INVALID_LINE_NUMBER to mean line number information is not 
> available, and 0 to mean this is code that was generated by the compiler, but 
> is artificial.  That's the way clang marks code (e.g. junk generated by ARC) 
> that lldb will need to step through, or whatever, but should not show to the 
> user.
> 
> That's a useful distinction, and I'd like to maintain it.  What bad behavior 
> are you seeing based on this?
> 
> Jim
> 
> On Mar 14, 2014, at 1:49 AM, Andrew MacPherson <andrew.m...@gmail.com> wrote:
> 
>> gdb assumes that any debug entry with a line number of 0 means that line 
>> number information is not available (see struct symtab_and_line here):
>> 
>> http://www.opensource.apple.com/source/gdb/gdb-967/src/gdb/symtab.h
>> 
>> lldb currently uses UINT32_MAX for the same thing.
>> 
>> I suggest changing lldb to use the same value as gdb so that it's possible 
>> to mark line entry data as invalid in the same way for both debuggers.
>> 
>> Thanks,
>> Andrew
>> <invalid-line-number.patch>_______________________________________________
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> 
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