Add support.supports_perf_trampoline_profiling() function

Author: vstinner

Lib/test/libregrtest/skipped.py

@@ -282,8 +282,6 @@ def expected_to_be_skipped(test_name):
 
     if test_name in ('test_perf_profiler', 'test_perfmaps', 'test_samply_profiler'):
         # need perf trampoline profiling
-        import sysconfig
-        perf_trampoline = sysconfig.get_config_var("PY_HAVE_PERF_TRAMPOLINE")
-        return (not perf_trampoline or int(perf_trampoline) != 1)
+        return not support.supports_perf_trampoline_profiling()
 
     return False

Lib/test/support/__init__.py

@@ -3614,3 +3614,10 @@ def inject_memory_error_cm(start=0, stop=0):
         yield
     finally:
         _testcapi.remove_mem_hooks()
+
+
+def supports_perf_trampoline_profiling():
+    perf_trampoline = sysconfig.get_config_var("PY_HAVE_PERF_TRAMPOLINE")
+    if not perf_trampoline:
+        return False
+    return int(perf_trampoline) == 1

Lib/test/test_perf_profiler.py

@@ -23,14 +23,7 @@
     raise unittest.SkipTest("test crash randomly on ASAN/MSAN build")
 
 
-def supports_trampoline_profiling():
-    perf_trampoline = sysconfig.get_config_var("PY_HAVE_PERF_TRAMPOLINE")
-    if not perf_trampoline:
-        return False
-    return int(perf_trampoline) == 1
-
-
-if not supports_trampoline_profiling():
+if not support.supports_perf_trampoline_profiling():
     raise unittest.SkipTest("perf trampoline profiling not supported")
 
 

Lib/test/test_perfmaps.py

@@ -8,13 +8,7 @@
 except ImportError:
     raise unittest.SkipTest("requires _testinternalcapi")
 
-def supports_trampoline_profiling():
-    perf_trampoline = sysconfig.get_config_var("PY_HAVE_PERF_TRAMPOLINE")
-    if not perf_trampoline:
-        return False
-    return int(perf_trampoline) == 1
-
-if not supports_trampoline_profiling():
+if not support.supports_perf_trampoline_profiling():
     raise unittest.SkipTest("perf trampoline profiling not supported")
 
 class TestPerfMapWriting(unittest.TestCase):

Lib/test/test_samply_profiler.py

@@ -20,14 +20,7 @@
     raise unittest.SkipTest("test crash randomly on ASAN/MSAN build")
 
 
-def supports_trampoline_profiling():
-    perf_trampoline = sysconfig.get_config_var("PY_HAVE_PERF_TRAMPOLINE")
-    if not perf_trampoline:
-        return False
-    return int(perf_trampoline) == 1
-
-
-if not supports_trampoline_profiling():
+if not support.supports_perf_trampoline_profiling():
     raise unittest.SkipTest("perf trampoline profiling not supported")