65 lines · python
1"""Test reading c-strings from memory via SB API."""2 3 4import os5import lldb6from lldbsuite.test.decorators import *7from lldbsuite.test.lldbtest import *8from lldbsuite.test import lldbutil9 10 11class TestReadMemCString(TestBase):12 NO_DEBUG_INFO_TESTCASE = True13 14 def test_read_memory_c_string(self):15 """Test corner case behavior of SBProcess::ReadCStringFromMemory"""16 self.build()17 self.dbg.SetAsync(False)18 19 self.main_source = "main.c"20 self.main_source_path = os.path.join(self.getSourceDir(), self.main_source)21 self.main_source_spec = lldb.SBFileSpec(self.main_source_path)22 self.exe = self.getBuildArtifact("read-mem-cstring")23 24 (target, process, thread, bkpt) = lldbutil.run_to_source_breakpoint(25 self, "breakpoint here", self.main_source_spec, None, self.exe26 )27 28 frame = thread.GetFrameAtIndex(0)29 30 err = lldb.SBError()31 32 empty_str_addr = frame.FindVariable("empty_string").GetValueAsUnsigned(err)33 self.assertSuccess(err)34 self.assertNotEqual(empty_str_addr, lldb.LLDB_INVALID_ADDRESS)35 36 one_letter_str_addr = frame.FindVariable(37 "one_letter_string"38 ).GetValueAsUnsigned(err)39 self.assertSuccess(err)40 self.assertNotEqual(one_letter_str_addr, lldb.LLDB_INVALID_ADDRESS)41 42 invalid_memory_str_addr = frame.FindVariable(43 "invalid_memory_string"44 ).GetValueAsUnsigned(err)45 self.assertSuccess(err)46 self.assertNotEqual(invalid_memory_str_addr, lldb.LLDB_INVALID_ADDRESS)47 48 # Important: An empty (0-length) c-string must come back as a Python string, not a49 # None object.50 empty_str = process.ReadCStringFromMemory(empty_str_addr, 2048, err)51 self.assertSuccess(err)52 self.assertEqual(empty_str, "")53 54 one_letter_string = process.ReadCStringFromMemory(55 one_letter_str_addr, 2048, err56 )57 self.assertSuccess(err)58 self.assertEqual(one_letter_string, "1")59 60 invalid_memory_string = process.ReadCStringFromMemory(61 invalid_memory_str_addr, 2048, err62 )63 self.assertTrue(err.Fail())64 self.assertTrue(invalid_memory_string == "" or invalid_memory_string is None)65