[libomptarget] Harmonize emitting CUDA errors and general debug messages.

Ensures that CUDA fail reasons (such as "No CUDA-capable device detected")
are printed together with libomptarget's debug message
(e.g. "Error when setting CUDA context"). Previously, the former was
printed only in CMAKE_BUILD_TYPE=Debug builds while the latter was
enabled by LIBOMPTARGET_ENABLE_DEBUG.

With this change, also only call cuGetErrorString when the error will be
printed.

Suggested-by: Ye Luo <xw111luoye@gmail.com>

Differential Revision: https://reviews.llvm.org/D65687

llvm-svn: 367910

openmp/libomptarget/plugins/cuda/CMakeLists.txt

@@ -28,10 +28,6 @@ libomptarget_say("Building CUDA offloading plugin.")
 # Define the suffix for the runtime messaging dumps.
 add_definitions(-DTARGET_NAME=CUDA)
 
-if(LIBOMPTARGET_CMAKE_BUILD_TYPE MATCHES debug)
-    add_definitions(-DCUDA_ERROR_REPORT)
-endif()
-
 include_directories(${LIBOMPTARGET_DEP_CUDA_INCLUDE_DIRS})
 include_directories(${LIBOMPTARGET_DEP_LIBELF_INCLUDE_DIRS})
 

openmp/libomptarget/plugins/cuda/src/rtl.cpp

@@ -34,25 +34,23 @@ static int DebugLevel = 0;
       DEBUGP("Target " GETNAME(TARGET_NAME) " RTL", __VA_ARGS__); \
     } \
   } while (false)
+
+// Utility for retrieving and printing CUDA error string.
+#define CUDA_ERR_STRING(err) \
+  do { \
+    if (DebugLevel > 0) { \
+      const char *errStr; \
+      cuGetErrorString(err, &errStr); \
+      DEBUGP("Target " GETNAME(TARGET_NAME) " RTL", "CUDA error is: %s\n", errStr); \
+    } \
+  } while (false)
 #else // OMPTARGET_DEBUG
 #define DP(...) {}
+#define CUDA_ERR_STRING(err) {}
 #endif // OMPTARGET_DEBUG
 
 #include "../../common/elf_common.c"
 
-// Utility for retrieving and printing CUDA error string.
-#ifdef CUDA_ERROR_REPORT
-#define CUDA_ERR_STRING(err)                                                   \
-  do {                                                                         \
-    const char *errStr;                                                        \
-    cuGetErrorString(err, &errStr);                                            \
-    DP("CUDA error is: %s\n", errStr);                                         \
-  } while (0)
-#else
-#define CUDA_ERR_STRING(err)                                                   \
-  {}
-#endif
-
 /// Keep entries table per device.
 struct FuncOrGblEntryTy {
   __tgt_target_table Table;