| """ |
| Test that lldb can continue past a __builtin_debugtrap, but not a __builtin_trap |
| """ |
| |
| import lldb |
| import lldbsuite.test.lldbutil as lldbutil |
| from lldbsuite.test.decorators import * |
| from lldbsuite.test.lldbtest import * |
| |
| |
| class BuiltinDebugTrapTestCase(TestBase): |
| NO_DEBUG_INFO_TESTCASE = True |
| |
| def test(self): |
| platform_stop_reason = lldb.eStopReasonSignal |
| platform = self.getPlatform() |
| if self.platformIsDarwin() or platform == "windows": |
| platform_stop_reason = lldb.eStopReasonException |
| |
| self.build() |
| (target, process, thread, bkpt) = lldbutil.run_to_source_breakpoint( |
| self, "// Set a breakpoint here", lldb.SBFileSpec("main.c") |
| ) |
| |
| # Continue to __builtin_debugtrap() |
| process.Continue() |
| if self.TraceOn(): |
| self.runCmd("f") |
| self.runCmd("bt") |
| self.runCmd("ta v global") |
| |
| self.assertEqual( |
| process.GetSelectedThread().GetStopReason(), platform_stop_reason |
| ) |
| |
| list = target.FindGlobalVariables("global", 1, lldb.eMatchTypeNormal) |
| self.assertEqual(list.GetSize(), 1) |
| global_value = list.GetValueAtIndex(0) |
| |
| self.assertEqual(global_value.GetValueAsUnsigned(), 5) |
| |
| # Continue to the __builtin_trap() -- we should be able to |
| # continue past __builtin_debugtrap. |
| process.Continue() |
| if self.TraceOn(): |
| self.runCmd("f") |
| self.runCmd("bt") |
| self.runCmd("ta v global") |
| |
| self.assertEqual( |
| process.GetSelectedThread().GetStopReason(), platform_stop_reason |
| ) |
| |
| # "global" is now 10. |
| self.assertEqual(global_value.GetValueAsUnsigned(), 10) |
| |
| # Change the handling of SIGILL on Linux - do not pass it to the |
| # inferior, but stop and notify lldb. If we don't do this, the |
| # inferior will receive the SIGILL and be terminated. On x86_64, |
| # __builtin_trap() emits UD2; on ARM it emits UDF — both generate |
| # SIGILL. AArch64 uses BRK #1 (SIGTRAP, already suppressed by |
| # default), so this is harmless there. |
| if platform == "linux": |
| self.runCmd("process handle -p false SIGILL") |
| |
| # We should be at the same point as before -- cannot advance |
| # past a __builtin_trap(). |
| process.Continue() |
| if self.TraceOn(): |
| self.runCmd("f") |
| self.runCmd("bt") |
| self.runCmd("ta v global") |
| |
| self.assertEqual( |
| process.GetSelectedThread().GetStopReason(), platform_stop_reason |
| ) |
| |
| # "global" is still 10. |
| self.assertEqual(global_value.GetValueAsUnsigned(), 10) |
