Section and type conversion inside a function blows up section size
Nobody has claimed this yet.
Assessment
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Newbie friendliness
- 45/100
Research direction
Start by running the provided main function with std::mem::create_section and compare its section size with the equivalent code at global scope. Trace how StringToByteConverter and converter.val affect the file section, then verify that the reproduced case reports a size of 0x2 rather than 0x40000002.
Written by the indexing model from the issue text.
Description
Given the following pattern:
import std.mem;
#pragma array_limit -1
union StringToByteConverter<auto size>
{
u8 data[size];
str val;
};
fn main()
{
u128 size = 2;
auto fileSection = std::mem::create_section("file");
StringToByteConverter<size> converter @ 0x0 in fileSection;
converter.val = "a" * size;
};
it would be expected for the "file" section to have a size of 0x2. Instead it has a size of 0x40000002.
Moving the code to global scope (so outside of main) resolves this issue.
Issue verified by AxCut on Discord.
- Dominant language
- C++
- Stars
- 275
- Forks
- 75
- Avg merge
- 1d 22h
- Merged PRs (30d)
- 10
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