2238dcc393
This is an ongoing series of commits that are reformatting our Python code. Reformatting is done with `black` (23.1.0). If you end up having problems merging this commit because you have made changes to a python file, the best way to handle that is to run `git checkout --ours <yourfile>` and then reformat it with black. RFC: https://discourse.llvm.org/t/rfc-document-and-standardize-python-code-style Differential revision: https://reviews.llvm.org/D151460
62 lines
2.2 KiB
Python
62 lines
2.2 KiB
Python
"""
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Test the MemoryCache L1 flush.
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"""
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import lldb
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from lldbsuite.test.decorators import *
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from lldbsuite.test.lldbtest import *
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import lldbsuite.test.lldbutil as lldbutil
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class MemoryCacheTestCase(TestBase):
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def setUp(self):
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# Call super's setUp().
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TestBase.setUp(self)
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# Find the line number to break inside main().
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self.line = line_number("main.cpp", "// Set break point at this line.")
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@skipIfWindows # This is flakey on Windows: llvm.org/pr38373
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def test_memory_cache(self):
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"""Test the MemoryCache class with a sequence of 'memory read' and 'memory write' operations."""
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self.build()
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exe = self.getBuildArtifact("a.out")
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self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
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# Break in main() after the variables are assigned values.
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lldbutil.run_break_set_by_file_and_line(
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self, "main.cpp", self.line, num_expected_locations=1, loc_exact=True
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)
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self.runCmd("run", RUN_SUCCEEDED)
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# The stop reason of the thread should be breakpoint.
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self.expect(
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"thread list",
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STOPPED_DUE_TO_BREAKPOINT,
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substrs=["stopped", "stop reason = breakpoint"],
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)
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# The breakpoint should have a hit count of 1.
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lldbutil.check_breakpoint(self, bpno=1, expected_hit_count=1)
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# Read a chunk of memory containing &my_ints[0]. The number of bytes read
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# must be greater than m_L2_cache_line_byte_size to make sure the L1
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# cache is used.
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self.runCmd("memory read -f d -c 201 `&my_ints - 100`")
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# Check the value of my_ints[0] is the same as set in main.cpp.
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line = self.res.GetOutput().splitlines()[100]
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self.assertEquals(0x00000042, int(line.split(":")[1], 0))
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# Change the value of my_ints[0] in memory.
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self.runCmd("memory write -s 4 `&my_ints` AA")
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# Re-read the chunk of memory. The cache line should have been
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# flushed because of the 'memory write'.
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self.runCmd("memory read -f d -c 201 `&my_ints - 100`")
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# Check the value of my_ints[0] have been updated correctly.
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line = self.res.GetOutput().splitlines()[100]
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self.assertEquals(0x000000AA, int(line.split(":")[1], 0))
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