userspace/cuda: libcuda analysis tree (debug-focused), guest ioctl tracer

Analysis tooling for debugging CUDA execution in Open-IOV guests:
- userspace/cuda/570.144/: fetch a library from a running guest (nc),
  objdump helpers, crash ip -> file vaddr + symbol mapping, and Ghidra
  headless import/analysis/decompile scripts (project kept so single
  functions decompile in seconds). The purpose is debugging correctness
  and performance of CUDA in Open-IOV VMs (not a reimplementation);
  extracted binaries and decompiled output are gitignored.
- tools/guest-diag/ioctl_trace.c: ptrace tracker for the NVIDIA driver
  ioctls of a child (libcuda issues raw syscalls, so LD_PRELOAD sees
  nothing). Decodes RM_ALLOC (class) and RM_CONTROL (cmd) arguments;
  this is how the cuCtxCreate crash sequence was captured.
- tools/test/cuda_drv_test.c: unbuffered + per-call markers so a crash
  identifies the CUDA call it happened in.

1 files changed, 2 insertions, 0 deletions

diff --git a/tools/guest-diag/push_guest_tools.sh b/tools/guest-diag/push_guest_tools.sh
index a2a3dbb..517296f 100755
--- a/tools/guest-diag/push_guest_tools.sh
+++ b/tools/guest-diag/push_guest_tools.sh
@@ -22,10 +22,12 @@ echo "[*] pushing sources..."
 push_b64 "$HERE/ptrace_ioctl.c"  /tmp/ptio.c
 push_b64 "$HERE/guest_engines.c" /tmp/ge.c
 push_b64 "$HERE/rmq_probe.c"     /tmp/rmqp.c
+push_b64 "$HERE/ioctl_trace.c"   /tmp/iot.c
 push_b64 "$REPO/tools/test/cuda_drv_test.c" /tmp/cdt.c
 
 echo "[*] compiling in guest..."
 "$VMEXEC" exec "gcc -O1 -w -o /tmp/ptio /tmp/ptio.c && \
 gcc -O1 -w -o /tmp/ge /tmp/ge.c && \
 gcc -O1 -w -o /tmp/rmqp /tmp/rmqp.c && \
+gcc -O1 -w -o /tmp/iot /tmp/iot.c && \
 gcc -O1 -o /tmp/cdt /tmp/cdt.c -ldl && echo BUILD_OK"