TheRock/rocm-systems/emulation/rocjitsu/tests/kernels/rj_nop_probe.hip

// Copyright (c) 2026 Advanced Micro Devices, Inc.
// SPDX-License-Identifier: MIT

// Minimal no-op device probe fixture for testing/debugging DBI.
//
// Currently consumed by tests/dbi/probe_fixture_test.cpp.
//
// This is a __device__ function, not a __global__ kernel. See
// rj_add_probe_object in cmake/rj_add_device_kernel.cmake for how to build it.
//
// The attributes keep the symbol alive and callable:
//   extern "C"             - unmangled "rj_nop_probe" symbol name
//   noinline               - keep a real, callable function body
//   used                   - do not eliminate the unreferenced function
//   visibility("default")  - keep the symbol exported
//
// Compiled for gfx90a, this lowers to `s_waitcnt 0` then
// `s_setpc_b64 s[30:31]` (a return through the s[30:31] link pair).
//
extern "C" __device__ __attribute__((noinline, used, visibility("default"))) void rj_nop_probe() {}