test(rccl): add host microtests for the GIN host proxy

projects/rccl/test/host/CMakeLists.txt

@@ -294,6 +294,13 @@ function(rccl_define_micro_source_lists)
     ../common/main_altrsmi.cpp
     PARENT_SCOPE)
 
+  # rccl-UnitTestsMicroGinHostProxy -- src/gin/gin_host_proxy.cc + src/gin/proxy_gpucontext/. Own
+  # binary: it defines the HIP and logging symbols the shared fakes also define.
+  set(TEST_MICRO_GIN_HOST_PROXY_SOURCE_FILES
+    gin-host-proxy-test.cc
+    ../common/main_altrsmi.cpp
+    PARENT_SCOPE)
+
   # rccl-UnitTestsMicroClientSupport -- src/ras/client_support.cc. Its own binary: this test's
   # inline stand-ins for ncclSocketsSameNode/rasPeerInfoToString/rasPeerToString (client_support.cc's
   # callees into src/ras/peers.cc) collide with the REAL peers.cc compiled into rccl-UnitTestsMicro
@@ -1081,6 +1088,22 @@ rccl_add_micro_binary(rccl-UnitTestsMicroWarpSpeed
     SYMMETRIC_SCHED_CC_PATH="${RCCL_HOST_HIPIFY_DIR}/src/scheduler/symmetric_sched.cc"
   CATEGORIES_YAML "${CMAKE_CURRENT_SOURCE_DIR}/../test_categories_micro_scheduler.yaml")
 
+# ---------------------------------------------------------------------------
+# rccl-UnitTestsMicroGinHostProxy
+# ---------------------------------------------------------------------------
+rccl_add_micro_binary(rccl-UnitTestsMicroGinHostProxy
+  SOURCES ${TEST_MICRO_GIN_HOST_PROXY_SOURCE_FILES}
+  EXTRA_INCLUDES
+    ${RCCL_HOST_HIPIFY_DIR}/src/include/plugin
+    ${RCCL_HOST_HIPIFY_DIR}/src/include/nccl_device
+  EXTRA_DEFS
+    ${_MICRO_MODE_DEFS}
+    GIN_HOST_PROXY_CC_PATH="${RCCL_HOST_HIPIFY_DIR}/src/gin/gin_host_proxy.cc"
+    GPUCONTEXT_CC_PATH="${RCCL_HOST_HIPIFY_DIR}/src/gin/proxy_gpucontext/gpucontext.cc"
+    GPUCONTEXT_V1_CC_PATH="${RCCL_HOST_HIPIFY_DIR}/src/gin/proxy_gpucontext/gpucontext_v1.cc"
+    GPUCONTEXT_V2_CC_PATH="${RCCL_HOST_HIPIFY_DIR}/src/gin/proxy_gpucontext/gpucontext_v2.cc"
+  CATEGORIES_YAML "${CMAKE_CURRENT_SOURCE_DIR}/../test_categories_micro_gin_host_proxy.yaml")
+
 # ---------------------------------------------------------------------------
 # rccl-UnitTestsMicroInit and variants
 # ---------------------------------------------------------------------------

projects/rccl/test/host/MICROTEST_README.md

@@ -277,6 +277,11 @@ export colliding non-`static` symbols; otherwise a unit needs its own binary:
   binaries cover both arms of both without a 2x2 cross product. init.cc compiles the *real* `argcheck.cc`/`archinfo.cc`/`utils.cc` ("oracle"
   TUs) from the hipify tree rather than stubbing them; `--gc-sections` drops the
   deep-path symbols the tests never reach. See `test_categories_micro_init.yaml`.
+- **`rccl-UnitTestsMicroGinHostProxy`** — `gin/gin_host_proxy.cc` and the three
+  `gin/proxy_gpucontext/` writers (`GIN_HOST_PROXY_CC_PATH`, `GPUCONTEXT{,_V1,_V2}_CC_PATH`,
+  from `gin-host-proxy-test.cc`); suites `GinHostProxy*`. Its own binary: it defines the
+  HIP and logging symbols the shared fakes also define. See
+  `test_categories_micro_gin_host_proxy.yaml`.
 - **`rccl-UnitTestsMicroWarpSpeed`** — `allgatherv_sched.cc` +
   `symmetric_sched.cc` (via `ALLGATHERV_SCHED_CC_PATH`/`SYMMETRIC_SCHED_CC_PATH`,
   both from `scheduler-test.cc`); suite `SchedulerMicrotest.*`. Its own binary,
@@ -916,6 +921,7 @@ cmake --build build -j"$(nproc)"
 ./build/rccl-UnitTestsMicroEnqueue            # enqueue.cc tests
 ./build/rccl-UnitTestsMicroEnqueue-devlinker  # same, RCCL_DEVICE_LINKER arm
 ./build/rccl-UnitTestsMicroSymKernels         # sym_kernels.cc tests
+./build/rccl-UnitTestsMicroGinHostProxy       # src/gin/gin_host_proxy.cc + proxy_gpucontext/
 ./build/rccl-UnitTestsMicroTaskPrep           # src/enqueue/task_prep/ + task_sched/ tests
 ./build/rccl-UnitTestsMicroConnect            # src/graph/connect.cc Preset/Postset tests
 ./build/rccl-UnitTestsMicroDiagnostics        # src/diagnostics/{p2p,ib_write_bw}.cc tests