""" Test some SBValue APIs. """ import os, time import re import unittest2 import lldb, lldbutil from lldbtest import * class ChangeValueAPITestCase(TestBase): mydir = os.path.join("python_api", "value", "change_values") @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin") @python_api_test @dsym_test def test_change_value_with_dsym(self): """Exercise the SBValue::SetValueFromCString API.""" d = {'EXE': self.exe_name} self.buildDsym(dictionary=d) self.setTearDownCleanup(dictionary=d) self.change_value_api(self.exe_name) @python_api_test @dwarf_test def test_change_value_with_dwarf(self): """Exercise the SBValue::SetValueFromCString API.""" d = {'EXE': self.exe_name} self.buildDwarf(dictionary=d) self.setTearDownCleanup(dictionary=d) self.change_value_api(self.exe_name) def setUp(self): # Call super's setUp(). TestBase.setUp(self) # We'll use the test method name as the exe_name. self.exe_name = self.testMethodName # Find the line number to of function 'c'. self.line = line_number('main.c', '// Stop here and set values') self.check_line = line_number('main.c', '// Stop here and check values') self.end_line = line_number ('main.c', '// Set a breakpoint here at the end') @skipIfGcc # llvm.org/pr15039: If GCC is the test compiler, stdout is not available via lldb.SBProcess.GetSTDOUT() def change_value_api(self, exe_name): """Exercise some SBValue APIs.""" exe = os.path.join(os.getcwd(), exe_name) # Create a target by the debugger. target = self.dbg.CreateTarget(exe) self.assertTrue(target, VALID_TARGET) # Create the breakpoint inside function 'main'. breakpoint = target.BreakpointCreateByLocation('main.c', self.line) self.assertTrue(breakpoint, VALID_BREAKPOINT) # Create the breakpoint inside the function 'main' check_breakpoint = target.BreakpointCreateByLocation('main.c', self.check_line) self.assertTrue(check_breakpoint, VALID_BREAKPOINT) # Create the breakpoint inside function 'main'. end_breakpoint = target.BreakpointCreateByLocation('main.c', self.end_line) self.assertTrue(end_breakpoint, VALID_BREAKPOINT) # Now launch the process, and do not stop at entry point. process = target.LaunchSimple(None, None, os.getcwd()) self.assertTrue(process, PROCESS_IS_VALID) # Get Frame #0. self.assertTrue(process.GetState() == lldb.eStateStopped) thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonBreakpoint) self.assertTrue(thread.IsValid(), "There should be a thread stopped due to breakpoint condition") frame0 = thread.GetFrameAtIndex(0) self.assertTrue (frame0.IsValid(), "Got a valid frame.") # Get the val variable and change it: error = lldb.SBError() val_value = frame0.FindVariable ("val") self.assertTrue (val_value.IsValid(), "Got the SBValue for val") actual_value = val_value.GetValueAsSigned (error, 0); self.assertTrue (error.Success(), "Got a value from val") self.assertTrue (actual_value == 100, "Got the right value from val") result = val_value.SetValueFromCString ("12345") self.assertTrue (result, "Setting val returned True.") actual_value = val_value.GetValueAsSigned (error, 0); self.assertTrue (error.Success(), "Got a changed value from val") self.assertTrue (actual_value == 12345, "Got the right changed value from val") # Now check that we can set a structure element: mine_value = frame0.FindVariable ("mine") self.assertTrue (mine_value.IsValid(), "Got the SBValue for mine") mine_second_value = mine_value.GetChildMemberWithName ("second_val") self.assertTrue (mine_second_value.IsValid(), "Got second_val from mine") actual_value = mine_second_value.GetValueAsUnsigned (error, 0) self.assertTrue (error.Success(), "Got an unsigned value for second_val") self.assertTrue (actual_value == 5555) result = mine_second_value.SetValueFromCString ("98765") self.assertTrue (result, "Success setting mine.second_value.") actual_value = mine_second_value.GetValueAsSigned (error, 0); self.assertTrue (error.Success(), "Got a changed value from mine.second_val") self.assertTrue (actual_value == 98765, "Got the right changed value from mine.second_val") # Next do the same thing with the pointer version. ptr_value = frame0.FindVariable ("ptr") self.assertTrue (ptr_value.IsValid(), "Got the SBValue for ptr") ptr_second_value = ptr_value.GetChildMemberWithName ("second_val") self.assertTrue (ptr_second_value.IsValid(), "Got second_val from ptr") actual_value = ptr_second_value.GetValueAsUnsigned (error, 0) self.assertTrue (error.Success(), "Got an unsigned value for ptr->second_val") self.assertTrue (actual_value == 6666) result = ptr_second_value.SetValueFromCString ("98765") self.assertTrue (result, "Success setting ptr->second_value.") actual_value = ptr_second_value.GetValueAsSigned (error, 0); self.assertTrue (error.Success(), "Got a changed value from ptr->second_val") self.assertTrue (actual_value == 98765, "Got the right changed value from ptr->second_val") # gcc may set multiple locations for breakpoint breakpoint.SetEnabled(False) # Now continue, grab the stdout and make sure we changed the real values as well... process.Continue(); self.assertTrue(process.GetState() == lldb.eStateStopped) thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonBreakpoint) self.assertTrue(thread.IsValid(), "There should be a thread stopped due to breakpoint condition") expected_value = "Val - 12345 Mine - 55, 98765, 55555555. Ptr - 66, 98765, 66666666" stdout = process.GetSTDOUT(1000) self.assertTrue (expected_value in stdout, "STDOUT showed changed values.") # Finally, change the stack pointer to 0, and we should not make it to our end breakpoint. frame0 = thread.GetFrameAtIndex(0) self.assertTrue (frame0.IsValid(), "Second time: got a valid frame.") sp_value = frame0.FindValue ("sp", lldb.eValueTypeRegister); self.assertTrue (sp_value.IsValid(), "Got a stack pointer value") result = sp_value.SetValueFromCString("1") self.assertTrue (result, "Setting sp returned true.") actual_value = sp_value.GetValueAsUnsigned (error, 0) self.assertTrue (error.Success(), "Got a changed value for sp") self.assertTrue (actual_value == 1, "Got the right changed value for sp.") # Boundary condition test the SBValue.CreateValueFromExpression() API. # LLDB should not crash! nosuchval = mine_value.CreateValueFromExpression(None, None) process.Continue() self.assertTrue(process.GetState() == lldb.eStateStopped) thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonBreakpoint) self.assertTrue(thread == None, "We should not have managed to hit our second breakpoint with sp == 1") process.Kill() if __name__ == '__main__': import atexit lldb.SBDebugger.Initialize() atexit.register(lambda: lldb.SBDebugger.Terminate()) unittest2.main()