FFI seg faults when not used with a debugger | Bun | Page 1

rugged ermine Jan 1, 2024, 9:58 PM

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I'm trying to use Raylib inside of Bun but when I'm running my program, it works the first time but after that it crashes
And when I tried to see what's going on with a debugger, the program didn't crash
I tried with every version of bun from 1.0 to 1.0.20 and it still segfault

Here's the code

import * as raylibImport from "./index";

const cStr = (str: string) => Buffer.from(str + "\0");

const raylib = raylibImport.loadRaylib("libraylib.so");

raylib.symbols.InitWindow(800, 450, cStr("Hello World"));
while(!raylib.symbols.WindowShouldClose()) {
  raylib.symbols.BeginDrawing();
  raylib.symbols.ClearBackground(-1);
  raylib.symbols.EndDrawing();
}

raylib.symbols.CloseWindow();
raylib.close();

The function loadRaylib is an auto-generated function which contains every functions of raylib (I didn't format the code, and it's pretty long: https://paste.rs/SmfZp)

uneven olive Jan 1, 2024, 10:10 PM

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@rugged ermine it only crashes when you don't attach a debugger?

rugged ermine Jan 1, 2024, 10:11 PM

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Yes

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I couldn't try with gcc because I don't know how to use it

uneven olive Jan 1, 2024, 10:11 PM

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is the debugger catching anything

rugged ermine Jan 1, 2024, 10:13 PM

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I don't think
It doesn't show any log apart from Raylib's logs

uneven olive Jan 1, 2024, 10:14 PM

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@rugged ermine does it crash if you remove the DISPLAY part

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before the command

rugged ermine Jan 1, 2024, 10:15 PM

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No, I only needed it because I was using Sway inside of WSL

uneven olive Jan 1, 2024, 10:16 PM

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so it ONLY crashes when the display is set?

rugged ermine Jan 1, 2024, 10:18 PM

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No I don't need to set it if I'm running the program directly in the terminal

rugged ermine Jan 2, 2024, 12:18 PM

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Just tried with gdb and it works
I also tried with Bun 1.0.21 and it still crashes

uneven olive Jan 2, 2024, 12:28 PM

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I don't have any ideas

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It sounds like it's throwing something or has a check if you're using a debugger

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@rugged ermine is your library built in debug mode?

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the .so file

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I didn't think of that lol

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that's probably the problem

rugged ermine Jan 2, 2024, 2:06 PM

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uneven olive <@363811352688721930> is your library built in debug mode?

Yes it was, I just stripped it but it still crashes

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Somehow the first time in ran it after stripping it, it worked but running it a second time made it segfault

uneven olive Jan 2, 2024, 2:22 PM

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@rugged ermine try building it again

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and see if it works the first time you build it

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it might be caching it somehow

rugged ermine Jan 2, 2024, 2:26 PM

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It's still crashing

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Ok I think I found the problem
I removed most functions in the functions.ts file and it works
Probably an issue with Bun's parsing

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I'll try to find how many functions it can handle

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It somewhat works with around 130 functions but it crashes at 150

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It exactly crashes when there's 147 FFI functions

uneven olive Jan 2, 2024, 2:49 PM

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This is the second time someone has reported this issue

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You should make a GitHub issue about it

#FFI seg faults when not used with a debugger