> The `main` entry point ought to be a standard C "main" function. The argv > argument is an UnsafeMutablePointer<UnsafeMutablePointer<Int8>?>, which ought > to be ABI-compatible with a char** in C.
That was my assumption when I started, thank you for confirmation :) > When JIT'ing Swift, the value of argv doesn't matter because we replace the > process' arguments dynamically > https://github.com/apple/swift/blob/master/lib/Immediate/Immediate.cpp#L318. Hm, can you tell a bit more about this? I do not load the runtime, my crash may be caused by something not being initialized. Here is my simplified use-case: I compile a swift project with tests into bitcode, then I load the bitcode into memory, and then compile and execute a program using ORC JIT. > Do you have a trace for the crash? Sure, here it is: https://gist.github.com/AlexDenisov/2a8d9b0d391de73a97bce9e33a650f0f#file-trace-txt-L22-L42 > On 6 Mar 2017, at 20:14, Robert Widmann <devteam.cod...@gmail.com> wrote: > > %Sp is not an argument, it is the space necessary to hold a reference to the > CommandLine enumeration's static argv member. > > When JIT'ing Swift, the value of argv doesn't matter because we replace the > process' arguments dynamically > https://github.com/apple/swift/blob/master/lib/Immediate/Immediate.cpp#L318. > Do you have a trace for the crash? > > ~Robert Widmann > > 2017/03/06 12:33、Alex Denisov via swift-dev <swift-dev@swift.org> のメッセージ: > >> Hi there, >> >> I could not find a list for swift-corelibs-xctest so I am posting it here. >> >> I am trying to run tests based on XCTest >> (https://github.com/apple/swift-corelibs-xctest) using LLVM's JIT. >> Everything is working good so far. However, I am getting a crash. >> Based on a shallow investigation I can see that this is somehow related to >> the way Swift treats the command line arguments. Or, to be more precise, to >> the way I pass the arguments to the swift's 'main' function. >> >> What I did so far is not different from what I do to run C or C++ using JIT: >> >> auto main = ((int (*)(int, const char **))(intptr_t)mainPointer); >> const int argc = 1; >> const char *argv[] = { "some-name", NULL }; >> auto result = main(argc, argv); >> >> Based on what I see in the IR[1] the 'argv' has type "%Sp = type <{ i8* }>", >> which seems to be a struct with a pointer to something. >> >> So the question is: what is being passed as a second argument to the 'main' >> function of a swift program? >> >> Any other advice on JIT-ting Swift are more than welcome :) >> >> [1] https://gist.github.com/AlexDenisov/3c10540b544e82cfb6e58e1452491904 >> -- >> AlexDenisov >> Software Engineer, https://lowlevelbits.org >> >> _______________________________________________ >> swift-dev mailing list >> swift-dev@swift.org >> https://lists.swift.org/mailman/listinfo/swift-dev -- AlexDenisov Software Engineer, https://lowlevelbits.org _______________________________________________ swift-dev mailing list swift-dev@swift.org https://lists.swift.org/mailman/listinfo/swift-dev
