586114510c
from PEP8 (https://peps.python.org/pep-0008/#programming-recommendations): > Comparisons to singletons like None should always be done with is or is not, never the equality operators. Co-authored-by: Eisuke Kawashima <e-kwsm@users.noreply.github.com>
65 lines
2.2 KiB
Python
65 lines
2.2 KiB
Python
"""Test reading c-strings from memory via SB API."""
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import os
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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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from lldbsuite.test import lldbutil
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class TestReadMemCString(TestBase):
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NO_DEBUG_INFO_TESTCASE = True
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def test_read_memory_c_string(self):
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"""Test corner case behavior of SBProcess::ReadCStringFromMemory"""
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self.build()
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self.dbg.SetAsync(False)
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self.main_source = "main.c"
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self.main_source_path = os.path.join(self.getSourceDir(), self.main_source)
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self.main_source_spec = lldb.SBFileSpec(self.main_source_path)
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self.exe = self.getBuildArtifact("read-mem-cstring")
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(target, process, thread, bkpt) = lldbutil.run_to_source_breakpoint(
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self, "breakpoint here", self.main_source_spec, None, self.exe
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)
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frame = thread.GetFrameAtIndex(0)
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err = lldb.SBError()
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empty_str_addr = frame.FindVariable("empty_string").GetValueAsUnsigned(err)
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self.assertSuccess(err)
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self.assertNotEqual(empty_str_addr, lldb.LLDB_INVALID_ADDRESS)
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one_letter_str_addr = frame.FindVariable(
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"one_letter_string"
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).GetValueAsUnsigned(err)
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self.assertSuccess(err)
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self.assertNotEqual(one_letter_str_addr, lldb.LLDB_INVALID_ADDRESS)
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invalid_memory_str_addr = frame.FindVariable(
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"invalid_memory_string"
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).GetValueAsUnsigned(err)
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self.assertSuccess(err)
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self.assertNotEqual(invalid_memory_str_addr, lldb.LLDB_INVALID_ADDRESS)
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# Important: An empty (0-length) c-string must come back as a Python string, not a
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# None object.
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empty_str = process.ReadCStringFromMemory(empty_str_addr, 2048, err)
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self.assertSuccess(err)
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self.assertEqual(empty_str, "")
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one_letter_string = process.ReadCStringFromMemory(
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one_letter_str_addr, 2048, err
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)
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self.assertSuccess(err)
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self.assertEqual(one_letter_string, "1")
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invalid_memory_string = process.ReadCStringFromMemory(
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invalid_memory_str_addr, 2048, err
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)
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self.assertTrue(err.Fail())
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self.assertTrue(invalid_memory_string == "" or invalid_memory_string is None)
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