62 lines · python
1"""2Test the MemoryCache L1 flush.3"""4 5 6import lldb7from lldbsuite.test.decorators import *8from lldbsuite.test.lldbtest import *9import lldbsuite.test.lldbutil as lldbutil10 11 12class MemoryCacheTestCase(TestBase):13 def setUp(self):14 # Call super's setUp().15 TestBase.setUp(self)16 # Find the line number to break inside main().17 self.line = line_number("main.cpp", "// Set break point at this line.")18 19 @skipIfWindows # This is flakey on Windows: llvm.org/pr3837320 def test_memory_cache(self):21 """Test the MemoryCache class with a sequence of 'memory read' and 'memory write' operations."""22 self.build()23 exe = self.getBuildArtifact("a.out")24 self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)25 26 # Break in main() after the variables are assigned values.27 lldbutil.run_break_set_by_file_and_line(28 self, "main.cpp", self.line, num_expected_locations=1, loc_exact=True29 )30 31 self.runCmd("run", RUN_SUCCEEDED)32 33 # The stop reason of the thread should be breakpoint.34 self.expect(35 "thread list",36 STOPPED_DUE_TO_BREAKPOINT,37 substrs=["stopped", "stop reason = breakpoint"],38 )39 40 # The breakpoint should have a hit count of 1.41 lldbutil.check_breakpoint(self, bpno=1, expected_hit_count=1)42 43 # Read a chunk of memory containing &my_ints[0]. The number of bytes read44 # must be greater than m_L2_cache_line_byte_size to make sure the L145 # cache is used.46 self.runCmd("memory read -f d -c 201 `&my_ints - 100`")47 48 # Check the value of my_ints[0] is the same as set in main.cpp.49 line = self.res.GetOutput().splitlines()[100]50 self.assertEqual(0x00000042, int(line.split(":")[1], 0))51 52 # Change the value of my_ints[0] in memory.53 self.runCmd("memory write -s 4 `&my_ints` AA")54 55 # Re-read the chunk of memory. The cache line should have been56 # flushed because of the 'memory write'.57 self.runCmd("memory read -f d -c 201 `&my_ints - 100`")58 59 # Check the value of my_ints[0] have been updated correctly.60 line = self.res.GetOutput().splitlines()[100]61 self.assertEqual(0x000000AA, int(line.split(":")[1], 0))62