| """Test reading c-strings from memory via SB API.""" |
| |
| from __future__ import print_function |
| |
| import os |
| import lldb |
| from lldbsuite.test.decorators import * |
| from lldbsuite.test.lldbtest import * |
| from lldbsuite.test import lldbutil |
| |
| |
| class TestReadMemCString(TestBase): |
| |
| mydir = TestBase.compute_mydir(__file__) |
| NO_DEBUG_INFO_TESTCASE = True |
| |
| def test_read_memory_c_string(self): |
| """Test corner case behavior of SBProcess::ReadCStringFromMemory""" |
| self.build() |
| self.dbg.SetAsync(False) |
| |
| self.main_source = "main.c" |
| self.main_source_path = os.path.join(self.getSourceDir(), |
| self.main_source) |
| self.main_source_spec = lldb.SBFileSpec(self.main_source_path) |
| self.exe = self.getBuildArtifact("read-mem-cstring") |
| |
| (target, process, thread, bkpt) = lldbutil.run_to_source_breakpoint( |
| self, 'breakpoint here', self.main_source_spec, None, self.exe) |
| |
| frame = thread.GetFrameAtIndex(0) |
| |
| err = lldb.SBError() |
| |
| empty_str_addr = frame.FindVariable("empty_string").GetValueAsUnsigned(err) |
| self.assertTrue(err.Success()) |
| self.assertTrue(empty_str_addr != lldb.LLDB_INVALID_ADDRESS) |
| |
| one_letter_str_addr = frame.FindVariable("one_letter_string").GetValueAsUnsigned(err) |
| self.assertTrue(err.Success()) |
| self.assertTrue(one_letter_str_addr != lldb.LLDB_INVALID_ADDRESS) |
| |
| invalid_memory_str_addr = frame.FindVariable("invalid_memory_string").GetValueAsUnsigned(err) |
| self.assertTrue(err.Success()) |
| self.assertTrue(invalid_memory_str_addr != lldb.LLDB_INVALID_ADDRESS) |
| |
| # Important: An empty (0-length) c-string must come back as a Python string, not a |
| # None object. |
| empty_str = process.ReadCStringFromMemory(empty_str_addr, 2048, err) |
| self.assertTrue(err.Success()) |
| self.assertTrue(empty_str == "") |
| |
| one_letter_string = process.ReadCStringFromMemory(one_letter_str_addr, 2048, err) |
| self.assertTrue(err.Success()) |
| self.assertTrue(one_letter_string == "1") |
| |
| invalid_memory_string = process.ReadCStringFromMemory(invalid_memory_str_addr, 2048, err) |
| self.assertTrue(err.Fail()) |
| self.assertTrue(invalid_memory_string == "" or invalid_memory_string == None) |
