[OpenMP][OMPT] Expect failure from tool_available_search.c on macOS

[tianshilei1992]

Summary

D91464 introduced verbose tool loading, but the test check only considers Linux.
On macOS, the outputs are totally different, causing the regression afterwards.
This patch simply sets the test to XFAIL on macOS.

Fix #56833.

[jdoerfert]

LG

[protze.joachim]

Since you seem to have access to a Mac, can you at least paste the output?

[tianshilei1992]

In D142045#4064376, @protze.joachim wrote:

Since you seem to have access to a Mac, can you at least paste the output?

I put it in the original review.

openmp/runtime/test/lit.cfg

if config.has_ompt:
     config.test_flags += " -I " + config.test_source_root + "/ompt"
 
 if 'Linux' in config.operating_system:
     config.available_features.add("linux")
 
 if config.operating_system == 'NetBSD':
     config.available_features.add("netbsd")
 
+if config.operating_system == 'Darwin':
+    config.available_features.add("darwin")
+
 if config.operating_system in ['Linux', 'Windows']:
     config.available_features.add('affinity')
 
 if config.operating_system in ['Linux']:
     config.available_features.add('hidden-helper')
 
 # Avoid Windows heuristics which try to detect potential installer programs
 # (which may need to run with elevated privileges) and ask if the user wants

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

 // RUN: %clang %flags -shared -fPIC %s -o %T/first_tool.so
 // RUN: %clang %flags -DTOOL -DSECOND_TOOL -shared -fPIC %s -o %T/second_tool.so
 // RUN: %clang %flags -DTOOL -DTHIRD_TOOL -shared -fPIC %s -o %T/third_tool.so
 // RUN: %libomp-compile -DCODE
 // RUN: env OMP_TOOL_LIBRARIES=%T/non_existing_file.so:%T/first_tool.so:%T/second_tool.so:%T/third_tool.so \
 // RUN: OMP_TOOL_VERBOSE_INIT=stdout %libomp-run | FileCheck %s -DPARENTPATH=%T
 
 // REQUIRES: ompt
+// XFAIL: darwin
 
 /*
- *  This file contains code for three OMPT shared library tool to be 
- *  loaded and the code for the OpenMP executable. 
- *  No option enables code for the first shared library 
+ *  This file contains code for three OMPT shared library tool to be
+ *  loaded and the code for the OpenMP executable.
+ *  No option enables code for the first shared library
  *  (without an implementation of ompt_start_tool) during compilation
  *  -DTOOL -DSECOND_TOOL enables the code for the second tool during compilation
  *  -DTOOL -DTHIRD_TOOL enables the code for the third tool during compilation
  *  -DCODE enables the code for the executable during compilation
  */
 
 // CHECK: ----- START LOGGING OF TOOL REGISTRATION -----
 // CHECK-NEXT: Search for OMP tool in current address space... Failed.

 // CHECK-NEXT: Searching for ompt_start_tool in
 // CHECK-SAME: [[PARENTPATH]]/third_tool.so... 0: Do initialize tool
 // CHECK-NEXT: Success.
 // CHECK-NEXT: Tool was started and is using the OMPT interface.
 // CHECK-NEXT: ----- END LOGGING OF TOOL REGISTRATION -----
 
 // Check if libomp supports the callbacks for this test.
 
-// CHECK-NOT: {{^}}0: Could not register callback 
+// CHECK-NOT: {{^}}0: Could not register callback
 // CHECK: {{^}}0: Tool initialized
 // CHECK: {{^}}0: ompt_event_thread_begin
 // CHECK-DAG: {{^}}0: ompt_event_thread_begin
 // CHECK-DAG: {{^}}0: control_tool()=-1
 // CHECK: {{^}}0: Tool finalized
 
 
 #ifdef CODE

 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;
 }
 #elif defined(THIRD_TOOL)
-// The third tool has an implementation of ompt_start_tool that returns a 
+// The third tool has an implementation of ompt_start_tool that returns a
 // pointer to a valid instance of ompt_start_tool_result_t
 
 static void
 on_ompt_callback_thread_begin(
   ompt_thread_t thread_type,
   ompt_data_t *thread_data)
 {
   printf("0: ompt_event_thread_begin\n");