> > On Mar 6, 2017, at 9:33 AM, Alex Denisov via swift-dev <swift-dev@swift.org> > wrote: > > 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 :)
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. -Joe
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