| """ |
| Test SBProcess APIs, including ReadMemory(), WriteMemory(), and others. |
| """ |
| |
| from __future__ import print_function |
| |
| |
| import lldb |
| from lldbsuite.test.decorators import * |
| from lldbsuite.test.lldbtest import * |
| from lldbsuite.test.lldbutil import get_stopped_thread, state_type_to_str |
| |
| |
| class ProcessAPITestCase(TestBase): |
| |
| mydir = TestBase.compute_mydir(__file__) |
| |
| def setUp(self): |
| # Call super's setUp(). |
| TestBase.setUp(self) |
| # Find the line number to break inside main(). |
| self.line = line_number( |
| "main.cpp", |
| "// Set break point at this line and check variable 'my_char'.") |
| |
| @skipIfReproducer # SBProcess::ReadMemory is not instrumented. |
| def test_read_memory(self): |
| """Test Python SBProcess.ReadMemory() API.""" |
| self.build() |
| exe = self.getBuildArtifact("a.out") |
| |
| target = self.dbg.CreateTarget(exe) |
| self.assertTrue(target, VALID_TARGET) |
| |
| breakpoint = target.BreakpointCreateByLocation("main.cpp", self.line) |
| self.assertTrue(breakpoint, VALID_BREAKPOINT) |
| |
| # Launch the process, and do not stop at the entry point. |
| process = target.LaunchSimple( |
| None, None, self.get_process_working_directory()) |
| |
| thread = get_stopped_thread(process, lldb.eStopReasonBreakpoint) |
| self.assertTrue( |
| thread.IsValid(), |
| "There should be a thread stopped due to breakpoint") |
| frame = thread.GetFrameAtIndex(0) |
| |
| # Get the SBValue for the global variable 'my_char'. |
| val = frame.FindValue("my_char", lldb.eValueTypeVariableGlobal) |
| self.DebugSBValue(val) |
| |
| # Due to the typemap magic (see lldb.swig), we pass in 1 to ReadMemory and |
| # expect to get a Python string as the result object! |
| error = lldb.SBError() |
| self.assertFalse(val.TypeIsPointerType()) |
| content = process.ReadMemory( |
| val.AddressOf().GetValueAsUnsigned(), 1, error) |
| if not error.Success(): |
| self.fail("SBProcess.ReadMemory() failed") |
| if self.TraceOn(): |
| print("memory content:", content) |
| |
| self.expect( |
| content, |
| "Result from SBProcess.ReadMemory() matches our expected output: 'x'", |
| exe=False, |
| startstr=b'x') |
| |
| # Read (char *)my_char_ptr. |
| val = frame.FindValue("my_char_ptr", lldb.eValueTypeVariableGlobal) |
| self.DebugSBValue(val) |
| cstring = process.ReadCStringFromMemory( |
| val.GetValueAsUnsigned(), 256, error) |
| if not error.Success(): |
| self.fail("SBProcess.ReadCStringFromMemory() failed") |
| if self.TraceOn(): |
| print("cstring read is:", cstring) |
| |
| self.expect( |
| cstring, |
| "Result from SBProcess.ReadCStringFromMemory() matches our expected output", |
| exe=False, |
| startstr='Does it work?') |
| |
| # Get the SBValue for the global variable 'my_cstring'. |
| val = frame.FindValue("my_cstring", lldb.eValueTypeVariableGlobal) |
| self.DebugSBValue(val) |
| |
| # Due to the typemap magic (see lldb.swig), we pass in 256 to read at most 256 bytes |
| # from the address, and expect to get a Python string as the result |
| # object! |
| self.assertFalse(val.TypeIsPointerType()) |
| cstring = process.ReadCStringFromMemory( |
| val.AddressOf().GetValueAsUnsigned(), 256, error) |
| if not error.Success(): |
| self.fail("SBProcess.ReadCStringFromMemory() failed") |
| if self.TraceOn(): |
| print("cstring read is:", cstring) |
| |
| self.expect( |
| cstring, |
| "Result from SBProcess.ReadCStringFromMemory() matches our expected output", |
| exe=False, |
| startstr='lldb.SBProcess.ReadCStringFromMemory() works!') |
| |
| # Get the SBValue for the global variable 'my_uint32'. |
| val = frame.FindValue("my_uint32", lldb.eValueTypeVariableGlobal) |
| self.DebugSBValue(val) |
| |
| # Due to the typemap magic (see lldb.swig), we pass in 4 to read 4 bytes |
| # from the address, and expect to get an int as the result! |
| self.assertFalse(val.TypeIsPointerType()) |
| my_uint32 = process.ReadUnsignedFromMemory( |
| val.AddressOf().GetValueAsUnsigned(), 4, error) |
| if not error.Success(): |
| self.fail("SBProcess.ReadCStringFromMemory() failed") |
| if self.TraceOn(): |
| print("uint32 read is:", my_uint32) |
| |
| if my_uint32 != 12345: |
| self.fail( |
| "Result from SBProcess.ReadUnsignedFromMemory() does not match our expected output") |
| |
| @skipIfReproducer # SBProcess::WriteMemory is not instrumented. |
| def test_write_memory(self): |
| """Test Python SBProcess.WriteMemory() API.""" |
| self.build() |
| exe = self.getBuildArtifact("a.out") |
| |
| target = self.dbg.CreateTarget(exe) |
| self.assertTrue(target, VALID_TARGET) |
| |
| breakpoint = target.BreakpointCreateByLocation("main.cpp", self.line) |
| self.assertTrue(breakpoint, VALID_BREAKPOINT) |
| |
| # Launch the process, and do not stop at the entry point. |
| process = target.LaunchSimple( |
| None, None, self.get_process_working_directory()) |
| |
| thread = get_stopped_thread(process, lldb.eStopReasonBreakpoint) |
| self.assertTrue( |
| thread.IsValid(), |
| "There should be a thread stopped due to breakpoint") |
| frame = thread.GetFrameAtIndex(0) |
| |
| # Get the SBValue for the global variable 'my_char'. |
| val = frame.FindValue("my_char", lldb.eValueTypeVariableGlobal) |
| self.DebugSBValue(val) |
| |
| # If the variable does not have a load address, there's no sense |
| # continuing. |
| if not val.GetLocation().startswith("0x"): |
| return |
| |
| # OK, let's get the hex location of the variable. |
| location = int(val.GetLocation(), 16) |
| |
| # The program logic makes the 'my_char' variable to have memory content as 'x'. |
| # But we want to use the WriteMemory() API to assign 'a' to the |
| # variable. |
| |
| # Now use WriteMemory() API to write 'a' into the global variable. |
| error = lldb.SBError() |
| result = process.WriteMemory(location, 'a', error) |
| if not error.Success() or result != 1: |
| self.fail("SBProcess.WriteMemory() failed") |
| |
| # Read from the memory location. This time it should be 'a'. |
| # Due to the typemap magic (see lldb.swig), we pass in 1 to ReadMemory and |
| # expect to get a Python string as the result object! |
| content = process.ReadMemory(location, 1, error) |
| if not error.Success(): |
| self.fail("SBProcess.ReadMemory() failed") |
| if self.TraceOn(): |
| print("memory content:", content) |
| |
| self.expect( |
| content, |
| "Result from SBProcess.ReadMemory() matches our expected output: 'a'", |
| exe=False, |
| startstr=b'a') |
| |
| @skipIfReproducer # SBProcess::WriteMemory is not instrumented. |
| def test_access_my_int(self): |
| """Test access 'my_int' using Python SBProcess.GetByteOrder() and other APIs.""" |
| self.build() |
| exe = self.getBuildArtifact("a.out") |
| |
| target = self.dbg.CreateTarget(exe) |
| self.assertTrue(target, VALID_TARGET) |
| |
| breakpoint = target.BreakpointCreateByLocation("main.cpp", self.line) |
| self.assertTrue(breakpoint, VALID_BREAKPOINT) |
| |
| # Launch the process, and do not stop at the entry point. |
| process = target.LaunchSimple( |
| None, None, self.get_process_working_directory()) |
| |
| thread = get_stopped_thread(process, lldb.eStopReasonBreakpoint) |
| self.assertTrue( |
| thread.IsValid(), |
| "There should be a thread stopped due to breakpoint") |
| frame = thread.GetFrameAtIndex(0) |
| |
| # Get the SBValue for the global variable 'my_int'. |
| val = frame.FindValue("my_int", lldb.eValueTypeVariableGlobal) |
| self.DebugSBValue(val) |
| |
| # If the variable does not have a load address, there's no sense |
| # continuing. |
| if not val.GetLocation().startswith("0x"): |
| return |
| |
| # OK, let's get the hex location of the variable. |
| location = int(val.GetLocation(), 16) |
| |
| # Note that the canonical from of the bytearray is little endian. |
| from lldbsuite.test.lldbutil import int_to_bytearray, bytearray_to_int |
| |
| byteSize = val.GetByteSize() |
| bytes = int_to_bytearray(256, byteSize) |
| |
| byteOrder = process.GetByteOrder() |
| if byteOrder == lldb.eByteOrderBig: |
| bytes.reverse() |
| elif byteOrder == lldb.eByteOrderLittle: |
| pass |
| else: |
| # Neither big endian nor little endian? Return for now. |
| # Add more logic here if we want to handle other types. |
| return |
| |
| # The program logic makes the 'my_int' variable to have int type and value of 0. |
| # But we want to use the WriteMemory() API to assign 256 to the |
| # variable. |
| |
| # Now use WriteMemory() API to write 256 into the global variable. |
| error = lldb.SBError() |
| result = process.WriteMemory(location, bytes, error) |
| if not error.Success() or result != byteSize: |
| self.fail("SBProcess.WriteMemory() failed") |
| |
| # Make sure that the val we got originally updates itself to notice the |
| # change: |
| self.expect( |
| val.GetValue(), |
| "SBProcess.ReadMemory() successfully writes (int)256 to the memory location for 'my_int'", |
| exe=False, |
| startstr='256') |
| |
| # And for grins, get the SBValue for the global variable 'my_int' |
| # again, to make sure that also tracks the new value: |
| val = frame.FindValue("my_int", lldb.eValueTypeVariableGlobal) |
| self.expect( |
| val.GetValue(), |
| "SBProcess.ReadMemory() successfully writes (int)256 to the memory location for 'my_int'", |
| exe=False, |
| startstr='256') |
| |
| # Now read the memory content. The bytearray should have (byte)1 as |
| # the second element. |
| content = process.ReadMemory(location, byteSize, error) |
| if not error.Success(): |
| self.fail("SBProcess.ReadMemory() failed") |
| |
| # The bytearray_to_int utility function expects a little endian |
| # bytearray. |
| if byteOrder == lldb.eByteOrderBig: |
| content = bytearray(content, 'ascii') |
| content.reverse() |
| |
| new_value = bytearray_to_int(content, byteSize) |
| if new_value != 256: |
| self.fail("Memory content read from 'my_int' does not match (int)256") |
| |
| # Dump the memory content.... |
| if self.TraceOn(): |
| for i in content: |
| print("byte:", i) |
| |
| def test_remote_launch(self): |
| """Test SBProcess.RemoteLaunch() API with a process not in eStateConnected, and it should fail.""" |
| self.build() |
| exe = self.getBuildArtifact("a.out") |
| |
| target = self.dbg.CreateTarget(exe) |
| self.assertTrue(target, VALID_TARGET) |
| |
| # Launch the process, and do not stop at the entry point. |
| process = target.LaunchSimple( |
| None, None, self.get_process_working_directory()) |
| |
| if self.TraceOn(): |
| print("process state:", state_type_to_str(process.GetState())) |
| self.assertTrue(process.GetState() != lldb.eStateConnected) |
| |
| error = lldb.SBError() |
| success = process.RemoteLaunch( |
| None, None, None, None, None, None, 0, False, error) |
| self.assertTrue( |
| not success, |
| "RemoteLaunch() should fail for process state != eStateConnected") |
| |
| def test_get_num_supported_hardware_watchpoints(self): |
| """Test SBProcess.GetNumSupportedHardwareWatchpoints() API with a process.""" |
| self.build() |
| exe = self.getBuildArtifact("a.out") |
| self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET) |
| |
| target = self.dbg.CreateTarget(exe) |
| self.assertTrue(target, VALID_TARGET) |
| |
| breakpoint = target.BreakpointCreateByLocation("main.cpp", self.line) |
| self.assertTrue(breakpoint, VALID_BREAKPOINT) |
| |
| # Launch the process, and do not stop at the entry point. |
| process = target.LaunchSimple( |
| None, None, self.get_process_working_directory()) |
| |
| error = lldb.SBError() |
| num = process.GetNumSupportedHardwareWatchpoints(error) |
| if self.TraceOn() and error.Success(): |
| print("Number of supported hardware watchpoints: %d" % num) |
| |
| @no_debug_info_test |
| def test_get_process_info(self): |
| """Test SBProcess::GetProcessInfo() API with a locally launched process.""" |
| self.build() |
| exe = self.getBuildArtifact("a.out") |
| self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET) |
| |
| target = self.dbg.CreateTarget(exe) |
| self.assertTrue(target, VALID_TARGET) |
| |
| # Launch the process and stop at the entry point. |
| launch_info = target.GetLaunchInfo() |
| launch_info.SetWorkingDirectory(self.get_process_working_directory()) |
| launch_flags = launch_info.GetLaunchFlags() |
| launch_flags |= lldb.eLaunchFlagStopAtEntry |
| launch_info.SetLaunchFlags(launch_flags) |
| error = lldb.SBError() |
| process = target.Launch(launch_info, error) |
| |
| if not error.Success(): |
| self.fail("Failed to launch process") |
| |
| # Verify basic process info can be retrieved successfully |
| process_info = process.GetProcessInfo() |
| self.assertTrue(process_info.IsValid()) |
| file_spec = process_info.GetExecutableFile() |
| self.assertTrue(file_spec.IsValid()) |
| process_name = process_info.GetName() |
| self.assertIsNotNone(process_name, "Process has a name") |
| self.assertGreater(len(process_name), 0, "Process name isn't blank") |
| self.assertEqual(file_spec.GetFilename(), "a.out") |
| self.assertNotEqual( |
| process_info.GetProcessID(), lldb.LLDB_INVALID_PROCESS_ID, |
| "Process ID is valid") |
| triple = process_info.GetTriple() |
| self.assertIsNotNone(triple, "Process has a triple") |
| |
| # Additional process info varies by platform, so just check that |
| # whatever info was retrieved is consistent and nothing blows up. |
| if process_info.UserIDIsValid(): |
| self.assertNotEqual( |
| process_info.GetUserID(), lldb.UINT32_MAX, |
| "Process user ID is valid") |
| else: |
| self.assertEqual( |
| process_info.GetUserID(), lldb.UINT32_MAX, |
| "Process user ID is invalid") |
| |
| if process_info.GroupIDIsValid(): |
| self.assertNotEqual( |
| process_info.GetGroupID(), lldb.UINT32_MAX, |
| "Process group ID is valid") |
| else: |
| self.assertEqual( |
| process_info.GetGroupID(), lldb.UINT32_MAX, |
| "Process group ID is invalid") |
| |
| if process_info.EffectiveUserIDIsValid(): |
| self.assertNotEqual( |
| process_info.GetEffectiveUserID(), lldb.UINT32_MAX, |
| "Process effective user ID is valid") |
| else: |
| self.assertEqual( |
| process_info.GetEffectiveUserID(), lldb.UINT32_MAX, |
| "Process effective user ID is invalid") |
| |
| if process_info.EffectiveGroupIDIsValid(): |
| self.assertNotEqual( |
| process_info.GetEffectiveGroupID(), lldb.UINT32_MAX, |
| "Process effective group ID is valid") |
| else: |
| self.assertEqual( |
| process_info.GetEffectiveGroupID(), lldb.UINT32_MAX, |
| "Process effective group ID is invalid") |
| |
| process_info.GetParentProcessID() |
| |
| def test_allocate_deallocate_memory(self): |
| """Test Python SBProcess.AllocateMemory() and SBProcess.DeallocateMemory() APIs.""" |
| self.build() |
| (target, process, main_thread, main_breakpoint) = lldbutil.run_to_source_breakpoint( |
| self, "// Set break point at this line", lldb.SBFileSpec("main.cpp")) |
| |
| # Allocate a block of memory in the target process |
| error = lldb.SBError() |
| addr = process.AllocateMemory(16384, lldb.ePermissionsReadable, error) |
| if not error.Success() or addr == lldb.LLDB_INVALID_ADDRESS: |
| self.fail("SBProcess.AllocateMemory() failed") |
| |
| # Now use WriteMemory() API to write 'a' into the allocated |
| # memory. Note that the debugger can do this even though the |
| # block is not set writable. |
| result = process.WriteMemory(addr, 'a', error) |
| if not error.Success() or result != 1: |
| self.fail("SBProcess.WriteMemory() failed") |
| |
| # Read from the memory location. This time it should be 'a'. |
| # Due to the typemap magic (see lldb.swig), we pass in 1 to ReadMemory and |
| # expect to get a Python string as the result object! |
| content = process.ReadMemory(addr, 1, error) |
| if not error.Success(): |
| self.fail("SBProcess.ReadMemory() failed") |
| if self.TraceOn(): |
| print("memory content:", content) |
| |
| self.expect( |
| content, |
| "Result from SBProcess.ReadMemory() matches our expected output: 'a'", |
| exe=False, |
| startstr=b'a') |
| |
| # Verify that the process itself can read the allocated memory |
| frame = main_thread.GetFrameAtIndex(0) |
| val = frame.EvaluateExpression( |
| "test_read(reinterpret_cast<char *>({:#x}))".format(addr)) |
| self.expect(val.GetValue(), |
| "Result of test_read() matches expected output 'a'", |
| exe=False, |
| startstr="'a'") |
| |
| # Verify that the process cannot write into the block |
| val = frame.EvaluateExpression( |
| "test_write(reinterpret_cast<char *>({:#x}), 'b')".format(addr)) |
| if val.GetError().Success(): |
| self.fail( |
| "test_write() to allocated memory without write permission unexpectedly succeeded") |
| |
| # Deallocate the memory |
| error = process.DeallocateMemory(addr) |
| if not error.Success(): |
| self.fail("SBProcess.DeallocateMemory() failed") |
