/// <summary>
/// Attempt to initialize IPC for the current platform, using identifier data
/// passed via environment variables.
/// </summary>
public FuzzerIpc()
{
var shmId = Environment.GetEnvironmentVariable("__LIBFUZZER_SHM_ID");
var statusPipeId = Environment.GetEnvironmentVariable("__LIBFUZZER_STATUS_PIPE_ID");
var controlPipeId = Environment.GetEnvironmentVariable("__LIBFUZZER_CONTROL_PIPE_ID");
if (shmId == null || statusPipeId == null || controlPipeId == null)
{
throw new FuzzerIpcEnvironmentException();
}
if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
impl = new WindowsFuzzerIpc(shmId, statusPipeId, controlPipeId);
}
else
{
if (!Int32.TryParse(shmId, out var posixShmId))
{
// The shared memory ID cannot be parsed as a 32-bit integer, which means it cannot
// have been the return value of `shmget(2)`, and cannot be passed to `shmat(2)`.
throw new FuzzerIpcEnvironmentException();
}
impl = new PosixFuzzerIpc(posixShmId, statusPipeId, controlPipeId);
}
}
public FuzzerIpc(IFuzzerIpcImpl impl)
{
this.impl = impl;
}