Access to global variable metadata?

[SteveBoxite]

Hello, I am writing an extension for Cranelift, for which at one point I need to determine the size of static global data.

When compiling an example codebase, with the following buffer declaration and --emit=llvm-ir enabled, I get the expected IR output:

static BUFFER: [i32; 5] = [1, 2, 3, 4, 0];

gv0 = symbol userextname0 ; DefId(0:4 ~ extension_test_example[f5b4]::BUFFER)

I discovered that the above comment is generated in the codegen_fn_body function, but failed to further narrow it down. Is it possible to determine the exact spot where DefId is converted into a GlobalValueData object?

[bjorn3]

Constants and statics are handled in src/constant.rs. Their data is stored in the relevant cranelift_module::Module impl for the used compilation mode (AOT or JIT), for which Cranelift currently doesn't provide any way to dump the contents, so --emit llvm-ir doesn't either.