[lldb-dev] Hiding trampoline functions from the backtrace, is it possible ?

Tue Sep 24 10:28:16 PDT 2019

We've had many requests to elide some classes of entries in backtraces - like to mirror the Xcode display I mentioned previously.  Most of these requests don't depend on the functions being marked artificial.  So if we're going to do this, something more general than just "marked artificial" -> elided anyway.

Jim

> On Sep 24, 2019, at 3:01 AM, Nat! via lldb-dev <lldb-dev at lists.llvm.org> wrote:
> 
> Nat! schrieb am 24.09.19 um 00:28:
>> On 23.09.19 19:22, Adrian Prantl wrote:
>>> I think the best mechanism for this would be to ensure that the trampolines are marked up as DW_AT_artificial and/or DW_AT_trampoline by the compiler. I'm pretty sure LLDB then already knows how to hide artificial frames (somebody else can probably provide pointers for how that works).
>>> 
>>> -- adrian
>>> 
>> That's a good idea. I can just put __attribute__((artificial)__ on my dispatch functions. That's the low-hanging-fruit code I like :)
>> And though it might not fully work yet with lldb , it may in the future.
> 
> Unfortunately clang complains that the "'artificial' attribute only applies to inline functions" (why ?). Bummer.
> 
> Ciao
>   Nat!
> 
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