Add a @benchmarks_test decorator for test method we want to categorize as benchmarks test.

The test driver now takes an option "+b" which enables to run just the benchmarks tests.
By default, tests decorated with the @benchmarks_test decorator do not get run.

Add an example benchmarks test directory which contains nothing for the time being,
just to demonstrate the @benchmarks_test concept.

For example,

$ ./dotest.py -v benchmarks

...

----------------------------------------------------------------------
Collected 2 tests

1: test_with_gdb (TestRepeatedExprs.RepeatedExprssCase)
   Test repeated expressions with gdb. ... skipped 'benchmarks tests'
2: test_with_lldb (TestRepeatedExprs.RepeatedExprssCase)
   Test repeated expressions with lldb. ... skipped 'benchmarks tests'

----------------------------------------------------------------------
Ran 2 tests in 0.047s

OK (skipped=2)
$ ./dotest.py -v +b benchmarks

...

----------------------------------------------------------------------
Collected 2 tests

1: test_with_gdb (TestRepeatedExprs.RepeatedExprssCase)
   Test repeated expressions with gdb. ... running test_with_gdb
benchmarks result for test_with_gdb
ok
2: test_with_lldb (TestRepeatedExprs.RepeatedExprssCase)
   Test repeated expressions with lldb. ... running test_with_lldb
benchmarks result for test_with_lldb
ok

----------------------------------------------------------------------
Ran 2 tests in 0.270s

OK

Also mark some Python API tests which are missing the @python_api_test decorator.

llvm-svn: 136553

lldb/test/python_api/lldbutil/frame/TestFrameUtils.py

@@ -18,6 +18,7 @@ class FrameUtilsTestCase(TestBase):
         self.line = line_number('main.c',
                                 "// Find the line number here.")
 
+    @python_api_test
     def test_frame_utils(self):
         """Test utility functions for the frame object."""
         self.buildDefault()

lldb/test/python_api/lldbutil/iter/TestLLDBIterator.py

@@ -19,16 +19,19 @@ class LLDBIteratorTestCase(TestBase):
         self.line1 = line_number('main.cpp', '// Set break point at this line.')
         self.line2 = line_number('main.cpp', '// And that line.')
 
+    @python_api_test
     def test_lldb_iter_module(self):
         """Test module_iter works correctly for SBTarget -> SBModule."""
         self.buildDefault()
         self.lldb_iter_module()
 
+    @python_api_test
     def test_lldb_iter_breakpoint(self):
         """Test breakpoint_iter works correctly for SBTarget -> SBBreakpoint."""
         self.buildDefault()
         self.lldb_iter_breakpoint()
 
+    @python_api_test
     def test_lldb_iter_frame(self):
         """Test iterator works correctly for SBProcess->SBThread->SBFrame."""
         self.buildDefault()

lldb/test/python_api/lldbutil/iter/TestRegistersIterator.py

@@ -18,6 +18,7 @@ class RegistersIteratorTestCase(TestBase):
         # Find the line number to break inside main().
         self.line1 = line_number('main.cpp', '// Set break point at this line.')
 
+    @python_api_test
     def test_iter_registers(self):
         """Test iterator works correctly for lldbutil.iter_registers()."""
         self.buildDefault()

lldb/test/python_api/lldbutil/process/TestPrintStackTraces.py

@@ -18,6 +18,7 @@ class ThreadsStackTracesTestCase(TestBase):
         # Find the line number to break inside main().
         self.line = line_number('main.cpp', '// Set break point at this line.')
 
+    @python_api_test
     def test_stack_traces(self):
         """Test SBprocess and SBThread APIs with printing of the stack traces."""
         self.buildDefault()