couldn't load C-exported library

[aviatesk]

Especially, I found :jl_coverage_visit_line couldn't be loaded:

julia> let 
           file = @__FILE__
           line = @__LINE__
           ccall(:jl_coverage_visit_line, Cvoid, (Cstring, Csize_t, Cint), file, sizeof(file), line)
       end
ERROR: could not load symbol "jl_coverage_visit_line":
dlsym(RTLD_DEFAULT, jl_coverage_visit_line): symbol not found
Stacktrace:
 [1] top-level scope
   @ ./REPL[1]:4

, which is defined at:

julia/src/codegen.cpp

Lines 1861 to 1869 in 72ec349

	extern "C" JL_DLLEXPORT void jl_coverage_visit_line(const char* filename_, size_t len_filename, int line)
	{
	StringRef filename = StringRef(filename_, len_filename);
	if (imaging_mode || filename == "" || filename == "none" || filename == "no file" || filename == "<missing>" || line < 0)
	return;
	std::vector<logdata_block*> &vec = coverageData[filename];
	uint64_t *ptr = allocLine(vec, line);
	(*ptr)++;
	}

Bisected that #41936 seems to have caused this issue.

[JeffBezanson]

It might make sense to require explicitly requesting this from libjulia-codegen.

[vtjnash]

There's no particular reason that the interpreter should have to depend on having access to the compiler. Might need to move this to the runtime though.

[JeffBezanson]

Yeah I agree, it makes sense to keep the coverage and malloc data in the runtime.

[simeonschaub]

Is there a solution in sight for this? JuliaInterpreter now uses jl_coverage_visit_line, so this is quite breaking.

[JeffBezanson]

Yes I think this is not hard to fix.