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feat(ffi): unwind safety: shield FFI entrypoints with panic guard (#546)

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This PR implements widely accepted Rust programming practices for
dealing with panics across ABI (programming language) boundaries.

- Add panic_guard.rs to wrap FFI calls and prevent panic across FFI/ABI boundary (undefined behavior).
- Capture per-thread backtraces via a temporary panic hook
- After a panic, subsequent invocations are poisoned.
- Integrate with_unwind_guard across the engine, schema registry, and target registry exportis

Signed-off-by: Anand Krishnamoorthi <anakrish@microsoft.com>
This commit is contained in:
Anand Krishnamoorthi
2026-01-20 21:50:10 -06:00
committed by GitHub
parent 9426b2ec02
commit 80686d6ed1
21 changed files with 1008 additions and 501 deletions
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24
bindings/csharp/Regorus/Engine.cs
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@@ -373,21 +373,21 @@ namespace Regorus
string? CheckAndDropResult(Regorus.Internal.RegorusResult result)
{
if (result.status != Regorus.Internal.RegorusStatus.Ok)
try
{
var message = StringFromUTF8((IntPtr)result.error_message);
var ex = new Exception(message);
Regorus.Internal.API.regorus_result_drop(result);
throw ex;
}
if (result.status != Regorus.Internal.RegorusStatus.Ok)
{
var message = StringFromUTF8((IntPtr)result.error_message);
throw result.status.CreateException(message);
}
var resultString = "";
if (result.output is not null)
{
resultString = StringFromUTF8((IntPtr)result.output);
var output = result.output is not null ? StringFromUTF8((IntPtr)result.output) : null;
return output ?? string.Empty;
}
finally
{
Regorus.Internal.API.regorus_result_drop(result);
}
Regorus.Internal.API.regorus_result_drop(result);
return resultString;
}
private void ThrowIfDisposed()