Adel Prokurov (Aug 29 2025 at 05:30): Adel Prokurov (Aug 29 2025 at 05:30):Hello! I am writing a compiler for Scheme and have to initialize GLOBALS array for GC to trace globals. This array is initialized like this:
let globals_array = self
.module
.declare_data("CAPY_GLOBALS", Linkage::Export, false, false)
.unwrap();
let mut desc = DataDescription::new();
desc.set_align(size_of::<usize>() as _);
let datas = self
.constants
.values()
.copied()
.chain(self.cache_cells.values().copied());
let mut offset = 0;
for data in datas {
let gv = self.module.declare_data_in_data(data, &mut desc);
desc.write_data_addr(offset, gv, 0);
offset += 8;
}
desc.define_zeroinit(offset as usize);
self.module.define_data(globals_array, &desc).unwrap();
but when I load produced shared-library using dlopen and then dlsym the array it is not populated with anyfing but fully zeroed, is that expected?
Adel Prokurov (Aug 29 2025 at 05:30):what would be the correct way to put addresses of all constants into that array?
Adel Prokurov (Aug 29 2025 at 05:34):Oh apparently I had to use .define(vec![0; offset]) instead of zeroinit, that makes this thing work properly.
Notification Bot (Aug 29 2025 at 05:34):Adel Prokurov has marked this topic as resolved.
Last updated: Dec 06 2025 at 07:03 UTC