[Lldb-commits] [lldb] r231310 - Introduce lldbassert(x)

Enrico Granata egranata at apple.com
Wed Mar 4 17:12:55 PST 2015

> On Mar 4, 2015, at 4:39 PM, Zachary Turner <zturner at google.com> wrote:
> BTW, I have just uploaded http://reviews.llvm.org/D8068 <http://reviews.llvm.org/D8068> to LLVM which implements backtracing of self on Windows (previously only backtracing of other threads was supported).  So once that goes through, if we switch this code to using llvm::sys::PrintBacktrace(),

I don’t think we should make this change.
Host::Backtrace prints to an lldb_private::Stream which is our preferred API for accumulating output - the LLVM version of this seems to print to a FILE* which is much less general

I understand using LLVM facilities where it makes sense, but we should not be doing so blindly when the net effect is a loss of functionality for us

If you can implement Host::Backtrace in general on all platforms via LLVM, feel free to do so - but we should still go through lldb's Host::Backtrace for this, and Host::Backtrace should still use our Streams

> we should have a standard backtrace format across all platforms that LLVM supports.
> I like this feature now that I understand the use case, thanks for introducing it.

We had a power outage here in Cupertino, which delayed my reply
Glad to hear we all agree on this :-)

> On Wed, Mar 4, 2015 at 3:31 PM Siva Chandra <sivachandra at google.com <mailto:sivachandra at google.com>> wrote:
> On Wed, Mar 4, 2015 at 2:59 PM, Enrico Granata <egranata at apple.com <mailto:egranata at apple.com>> wrote:
> > +#define lldbassert(x) assert(x)
> > +#else
> > +#define lldbassert(x) lldb_private::lldb_assert(x, #x, __FUNCTION__, __FILE__, __LINE__)
> > +#endif
> Why should we have this ifdef? As in, why shouldn't we use lldb_assert
> unconditionally, always (giving us the benefit of backtraces always)?
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- Enrico
📩 egranata@.com ☎️ 27683

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