| """ |
| Use lldb Python SBFrame API to get the argument values of the call stacks. |
| And other SBFrame API tests. |
| """ |
| |
| from __future__ import print_function |
| |
| |
| import lldb |
| from lldbsuite.test.decorators import * |
| from lldbsuite.test.lldbtest import * |
| from lldbsuite.test import lldbutil |
| |
| |
| class FrameAPITestCase(TestBase): |
| |
| mydir = TestBase.compute_mydir(__file__) |
| |
| @add_test_categories(['pyapi']) |
| def test_get_arg_vals_for_call_stack(self): |
| """Exercise SBFrame.GetVariables() API to get argument vals.""" |
| self.build() |
| exe = self.getBuildArtifact("a.out") |
| |
| # Create a target by the debugger. |
| target = self.dbg.CreateTarget(exe) |
| self.assertTrue(target, VALID_TARGET) |
| |
| # Now create a breakpoint on main.c by name 'c'. |
| breakpoint = target.BreakpointCreateByName('c', 'a.out') |
| self.trace("breakpoint:", breakpoint) |
| self.assertTrue(breakpoint and |
| breakpoint.GetNumLocations() == 1, |
| VALID_BREAKPOINT) |
| |
| # Now launch the process, and do not stop at the entry point. |
| process = target.LaunchSimple( |
| None, None, self.get_process_working_directory()) |
| |
| process = target.GetProcess() |
| self.assertTrue(process.GetState() == lldb.eStateStopped, |
| PROCESS_STOPPED) |
| |
| # Keeps track of the number of times 'a' is called where it is within a |
| # depth of 3 of the 'c' leaf function. |
| callsOfA = 0 |
| |
| from six import StringIO as SixStringIO |
| session = SixStringIO() |
| while process.GetState() == lldb.eStateStopped: |
| thread = lldbutil.get_stopped_thread( |
| process, lldb.eStopReasonBreakpoint) |
| self.assertIsNotNone(thread) |
| # Inspect at most 3 frames. |
| numFrames = min(3, thread.GetNumFrames()) |
| for i in range(numFrames): |
| frame = thread.GetFrameAtIndex(i) |
| if self.TraceOn(): |
| print("frame:", frame) |
| |
| name = frame.GetFunction().GetName() |
| if name == 'a': |
| callsOfA = callsOfA + 1 |
| |
| # We'll inspect only the arguments for the current frame: |
| # |
| # arguments => True |
| # locals => False |
| # statics => False |
| # in_scope_only => True |
| valList = frame.GetVariables(True, False, False, True) |
| argList = [] |
| for val in valList: |
| argList.append("(%s)%s=%s" % (val.GetTypeName(), |
| val.GetName(), |
| val.GetValue())) |
| print("%s(%s)" % (name, ", ".join(argList)), file=session) |
| |
| # Also check the generic pc & stack pointer. We can't test their absolute values, |
| # but they should be valid. Uses get_GPRs() from the lldbutil |
| # module. |
| gpr_reg_set = lldbutil.get_GPRs(frame) |
| pc_value = gpr_reg_set.GetChildMemberWithName("pc") |
| self.assertTrue(pc_value, "We should have a valid PC.") |
| pc_value_int = int(pc_value.GetValue(), 0) |
| # Make sure on arm targets we dont mismatch PC value on the basis of thumb bit. |
| # Frame PC will not have thumb bit set in case of a thumb |
| # instruction as PC. |
| if self.getArchitecture() in ['arm', 'armv7', 'armv7k']: |
| pc_value_int &= ~1 |
| self.assertTrue( |
| pc_value_int == frame.GetPC(), |
| "PC gotten as a value should equal frame's GetPC") |
| sp_value = gpr_reg_set.GetChildMemberWithName("sp") |
| self.assertTrue( |
| sp_value, "We should have a valid Stack Pointer.") |
| self.assertTrue(int(sp_value.GetValue(), 0) == frame.GetSP( |
| ), "SP gotten as a value should equal frame's GetSP") |
| |
| print("---", file=session) |
| process.Continue() |
| |
| # At this point, the inferior process should have exited. |
| self.assertTrue( |
| process.GetState() == lldb.eStateExited, |
| PROCESS_EXITED) |
| |
| # Expect to find 'a' on the call stacks two times. |
| self.assertTrue(callsOfA == 2, |
| "Expect to find 'a' on the call stacks two times") |
| # By design, the 'a' call frame has the following arg vals: |
| # o a((int)val=1, (char)ch='A') |
| # o a((int)val=3, (char)ch='A') |
| if self.TraceOn(): |
| print("Full stack traces when stopped on the breakpoint 'c':") |
| print(session.getvalue()) |
| self.expect(session.getvalue(), "Argument values displayed correctly", |
| exe=False, |
| substrs=["a((int)val=1, (char)ch='A')", |
| "a((int)val=3, (char)ch='A')"]) |
| |
| @add_test_categories(['pyapi']) |
| def test_frame_api_boundary_condition(self): |
| """Exercise SBFrame APIs with boundary condition inputs.""" |
| self.build() |
| exe = self.getBuildArtifact("a.out") |
| |
| # Create a target by the debugger. |
| target = self.dbg.CreateTarget(exe) |
| self.assertTrue(target, VALID_TARGET) |
| |
| # Now create a breakpoint on main.c by name 'c'. |
| breakpoint = target.BreakpointCreateByName('c', 'a.out') |
| self.trace("breakpoint:", breakpoint) |
| self.assertTrue(breakpoint and |
| breakpoint.GetNumLocations() == 1, |
| VALID_BREAKPOINT) |
| |
| # Now launch the process, and do not stop at the entry point. |
| process = target.LaunchSimple( |
| None, None, self.get_process_working_directory()) |
| |
| process = target.GetProcess() |
| self.assertTrue(process.GetState() == lldb.eStateStopped, |
| PROCESS_STOPPED) |
| |
| thread = lldbutil.get_stopped_thread( |
| process, lldb.eStopReasonBreakpoint) |
| self.assertIsNotNone(thread) |
| frame = thread.GetFrameAtIndex(0) |
| if self.TraceOn(): |
| print("frame:", frame) |
| |
| # Boundary condition testings. |
| val1 = frame.FindVariable(None, True) |
| val2 = frame.FindVariable(None, False) |
| val3 = frame.FindValue(None, lldb.eValueTypeVariableGlobal) |
| if self.TraceOn(): |
| print("val1:", val1) |
| print("val2:", val2) |
| |
| frame.EvaluateExpression(None) |
| |
| @add_test_categories(['pyapi']) |
| def test_frame_api_IsEqual(self): |
| """Exercise SBFrame API IsEqual.""" |
| self.build() |
| exe = self.getBuildArtifact("a.out") |
| |
| # Create a target by the debugger. |
| target = self.dbg.CreateTarget(exe) |
| self.assertTrue(target, VALID_TARGET) |
| |
| # Now create a breakpoint on main.c by name 'c'. |
| breakpoint = target.BreakpointCreateByName('c', 'a.out') |
| self.trace("breakpoint:", breakpoint) |
| self.assertTrue(breakpoint and |
| breakpoint.GetNumLocations() == 1, |
| VALID_BREAKPOINT) |
| |
| # Now launch the process, and do not stop at the entry point. |
| process = target.LaunchSimple( |
| None, None, self.get_process_working_directory()) |
| |
| process = target.GetProcess() |
| self.assertTrue(process.GetState() == lldb.eStateStopped, |
| PROCESS_STOPPED) |
| |
| thread = lldbutil.get_stopped_thread( |
| process, lldb.eStopReasonBreakpoint) |
| self.assertIsNotNone(thread) |
| |
| frameEntered = thread.GetFrameAtIndex(0) |
| if self.TraceOn(): |
| print(frameEntered) |
| lldbutil.print_stacktrace(thread) |
| self.assertTrue(frameEntered) |
| |
| # Doing two step overs while still inside c(). |
| thread.StepOver() |
| thread.StepOver() |
| self.assertTrue(thread) |
| frameNow = thread.GetFrameAtIndex(0) |
| if self.TraceOn(): |
| print(frameNow) |
| lldbutil.print_stacktrace(thread) |
| self.assertTrue(frameNow) |
| |
| # The latest two frames are considered equal. |
| self.assertTrue(frameEntered.IsEqual(frameNow)) |
| |
| # Now let's step out of frame c(). |
| thread.StepOutOfFrame(frameNow) |
| frameOutOfC = thread.GetFrameAtIndex(0) |
| if self.TraceOn(): |
| print(frameOutOfC) |
| lldbutil.print_stacktrace(thread) |
| self.assertTrue(frameOutOfC) |
| |
| # The latest two frames should not be equal. |
| self.assertFalse(frameOutOfC.IsEqual(frameNow)) |
