[OMPT] Add tool_not_available testcase

Add a testcase that checks wheter the runtime can handle an ompt_start_tool
method that returns NULL indicating that no tool shall be loaded.

All tool_available testcases need a separate folder to avoid file conflicts for
the generated tools.

Differential Revision: https://reviews.llvm.org/D41904

llvm-svn: 324587

openmp/runtime/test/ompt/loadtool/tool_not_available/tool_not_available.c

@@ -0,0 +1,69 @@
+// The OpenMP standard defines 3 ways of providing ompt_start_tool:
+// 1. "statically-linking the tool’s definition of ompt_start_tool into an OpenMP application"
+// RUN: %libomp-compile -DCODE -DTOOL && %libomp-run | FileCheck %s
+
+// Note: We should compile the tool without -fopenmp as other tools developer
+//       would do. Otherwise this test may pass for the wrong reasons on Darwin.
+// RUN: %clang %flags -DTOOL -shared -fPIC %s -o %T/tool.so
+// 2. "introducing a dynamically-linked library that includes the tool’s definition of ompt_start_tool into the application’s address space"
+// 2.1 Link with tool during compilation
+// RUN: %libomp-compile -DCODE -Wl,--no-as-needed %T/tool.so && %libomp-run | FileCheck %s
+// 2.2 Link with tool during compilation, but AFTER the runtime
+// RUN: %libomp-compile -DCODE -lomp -Wl,--no-as-needed %T/tool.so && %libomp-run | FileCheck %s
+// 2.3 Inject tool via the dynamic loader
+// RUN: %libomp-compile -DCODE && %preload-tool %libomp-run | FileCheck %s
+
+// 3. "providing the name of a dynamically-linked library appropriate for the architecture and operating system used by the application in the tool-libraries-var ICV"
+// RUN: %libomp-compile -DCODE && env OMP_TOOL_LIBRARIES=%T/tool.so %libomp-run | FileCheck %s
+
+// REQUIRES: ompt
+
+/*
+ *  This file contains code for an OMPT shared library tool to be 
+ *  loaded and the code for the OpenMP executable. 
+ *  -DTOOL enables the code for the tool during compilation
+ *  -DCODE enables the code for the executable during compilation
+ */
+
+#ifdef CODE
+#include "stdio.h"
+#include "omp.h"
+#include "ompt.h"
+
+int main()
+{
+  #pragma omp parallel num_threads(2)
+  {
+    #pragma omp master
+    {
+      int result = omp_control_tool(omp_control_tool_start, 0, NULL);
+      printf("0: control_tool()=%d\n", result);
+    }
+  }
+
+
+  // Check if libomp supports the callbacks for this test.
+  // CHECK-NOT: {{^}}0: Could not register callback 
+  
+  // CHECK: {{^}}0: Do not initialize tool
+  // CHECK: {{^}}0: control_tool()=-2
+  
+
+  return 0;
+}
+
+#endif /* CODE */
+
+#ifdef TOOL
+
+#include <ompt.h>
+#include "stdio.h"
+
+ompt_start_tool_result_t* ompt_start_tool(
+  unsigned int omp_version,
+  const char *runtime_version)
+{
+  printf("0: Do not initialize tool\n");
+  return NULL;
+}
+#endif /* TOOL */