Hi Arnold! Thanks for the heads up. Comments below.
> On Oct 13, 2016, at 12:32 PM, Arnold Schwaighofer via swift-lldb-dev > <[email protected]> wrote: > > Hi LLDB team, > > as part of the ABI work for this year we would like to adopt the swift > calling convention. > > I am working on the swift/llvm side of this. > > <rdar://problem/19978563> Adopt the new Swift calling convention > > The swift calling convention “swiftcc” together with the “swifterror” and > “swiftself” attribute will change how many registers this calling convention > will use for passing arguments and returning values. Furthermore, the > “swifterror” and “swiftself” attribute will cause llvm to put the parameter > marked with this attribute into a specific register at the call side. > > The swift compiler will use this convention for native swift functions. We > have to be able to call native swift functions from the runtime so there is > also support in clang to define/declare functions with this calling > convention in C/C++. With Swift, we have a convention that we require LLDB and Swift versions to be identical in order to debug Swift code. In the case of C/C++ code, we have no such lock-step requirements. How would we identify C/C++ code that was using this calling convention? > > This might have implications on the debugger. > > My current plan is to finish the swift/llvm side of this work in the next > couple weeks. There is a prototype at > https://github.com/aschwaighofer/swift/tree/native_calling_convention_wip > that can be tried out today. > > There are two radars that track work related to lldb and dwarf support: > > <rdar://problem/24489517> DWARF support for the new Swift calling convention > <rdar://problem/25471028> LLDB support for new Swift calling convention > > > Best, > Arnold > > > > > _______________________________________________ > swift-lldb-dev mailing list > [email protected] > https://lists.swift.org/mailman/listinfo/swift-lldb-dev _______________________________________________ swift-lldb-dev mailing list [email protected] https://lists.swift.org/mailman/listinfo/swift-lldb-dev
