1 files changed, 220 insertions, 0 deletions
diff --git a/packages/Python/lldbsuite/test/functionalities/inferior-crashing/recursive-inferior/TestRecursiveInferior.py b/packages/Python/lldbsuite/test/functionalities/inferior-crashing/recursive-inferior/TestRecursiveInferior.py
new file mode 100644
index 000000000000..8afc81f6892a
--- /dev/null
+++ b/packages/Python/lldbsuite/test/functionalities/inferior-crashing/recursive-inferior/TestRecursiveInferior.py
@@ -0,0 +1,220 @@
+"""Test that lldb functions correctly after the inferior has crashed while in a recursive routine."""
+
+from __future__ import print_function
+
+
+
+import os, time
+import lldb
+import lldbsuite.test.lldbutil as lldbutil
+import lldbsuite.test.lldbplatformutil as lldbplatformutil
+from lldbsuite.test.lldbtest import *
+
+class CrashingRecursiveInferiorTestCase(TestBase):
+
+    mydir = TestBase.compute_mydir(__file__)
+
+    @expectedFailureFreeBSD("llvm.org/pr23699 SIGSEGV is reported as exception, not signal")
+    @expectedFailureWindows("llvm.org/pr24778")
+    def test_recursive_inferior_crashing(self):
+        """Test that lldb reliably catches the inferior crashing (command)."""
+        self.build()
+        self.recursive_inferior_crashing()
+
+    @expectedFailureWindows("llvm.org/pr24778")
+    def test_recursive_inferior_crashing_register(self):
+        """Test that lldb reliably reads registers from the inferior after crashing (command)."""
+        self.build()
+        self.recursive_inferior_crashing_registers()
+
+    @add_test_categories(['pyapi'])
+    @expectedFailureWindows("llvm.org/pr24778")
+    def test_recursive_inferior_crashing_python(self):
+        """Test that lldb reliably catches the inferior crashing (Python API)."""
+        self.build()
+        self.recursive_inferior_crashing_python()
+
+    @expectedFailureWindows("llvm.org/pr24778")
+    def test_recursive_inferior_crashing_expr(self):
+        """Test that the lldb expression interpreter can read from the inferior after crashing (command)."""
+        self.build()
+        self.recursive_inferior_crashing_expr()
+
+    @expectedFailureWindows("llvm.org/pr24778")
+    def test_recursive_inferior_crashing_step(self):
+        """Test that stepping after a crash behaves correctly."""
+        self.build()
+        self.recursive_inferior_crashing_step()
+
+    @expectedFailureFreeBSD('llvm.org/pr24939')
+    @expectedFailureWindows("llvm.org/pr24778")
+    @expectedFailureAndroid(archs=['aarch64'], api_levels=list(range(21 + 1))) # No eh_frame for sa_restorer
+    def test_recursive_inferior_crashing_step_after_break(self):
+        """Test that lldb functions correctly after stepping through a crash."""
+        self.build()
+        self.recursive_inferior_crashing_step_after_break()
+
+    @expectedFailureFreeBSD('llvm.org/pr15989') # Couldn't allocate space for the stack frame
+    @skipIfLinux # Inferior exits after stepping after a segfault. This is working as intended IMHO.
+    @expectedFailureWindows("llvm.org/pr24778")
+    def test_recursive_inferior_crashing_expr_step_and_expr(self):
+        """Test that lldb expressions work before and after stepping after a crash."""
+        self.build()
+        self.recursive_inferior_crashing_expr_step_expr()
+
+    def set_breakpoint(self, line):
+        lldbutil.run_break_set_by_file_and_line (self, "main.c", line, num_expected_locations=1, loc_exact=True)
+
+    def check_stop_reason(self):
+        # We should have one crashing thread
+        self.assertEqual(
+                len(lldbutil.get_crashed_threads(self, self.dbg.GetSelectedTarget().GetProcess())),
+                1,
+                STOPPED_DUE_TO_EXC_BAD_ACCESS)
+
+    def setUp(self):
+        # Call super's setUp().
+        TestBase.setUp(self)
+        # Find the line number of the crash.
+        self.line = line_number('main.c', '// Crash here.')
+
+    def recursive_inferior_crashing(self):
+        """Inferior crashes upon launching; lldb should catch the event and stop."""
+        exe = os.path.join(os.getcwd(), "a.out")
+        self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
+
+        self.runCmd("run", RUN_SUCCEEDED)
+
+        # The exact stop reason depends on the platform
+        if self.platformIsDarwin():
+            stop_reason = 'stop reason = EXC_BAD_ACCESS'
+        elif self.getPlatform() == "linux":
+            stop_reason = 'stop reason = signal SIGSEGV'
+        else:
+            stop_reason = 'stop reason = invalid address'
+        self.expect("thread list", STOPPED_DUE_TO_EXC_BAD_ACCESS,
+            substrs = ['stopped',
+                       stop_reason])
+
+        # And it should report a backtrace that includes main and the crash site.
+        self.expect("thread backtrace all",
+            substrs = [stop_reason, 'main', 'argc', 'argv', 'recursive_function'])
+
+        # And it should report the correct line number.
+        self.expect("thread backtrace all",
+            substrs = [stop_reason,
+                       'main.c:%d' % self.line])
+
+    def recursive_inferior_crashing_python(self):
+        """Inferior crashes upon launching; lldb should catch the event and stop."""
+        exe = os.path.join(os.getcwd(), "a.out")
+
+        target = self.dbg.CreateTarget(exe)
+        self.assertTrue(target, VALID_TARGET)
+
+        # Now launch the process, and do not stop at entry point.
+        # Both argv and envp are null.
+        process = target.LaunchSimple (None, None, self.get_process_working_directory())
+
+        if process.GetState() != lldb.eStateStopped:
+            self.fail("Process should be in the 'stopped' state, "
+                      "instead the actual state is: '%s'" %
+                      lldbutil.state_type_to_str(process.GetState()))
+
+        threads = lldbutil.get_crashed_threads(self, process)
+        self.assertEqual(len(threads), 1, "Failed to stop the thread upon bad access exception")
+
+        if self.TraceOn():
+            lldbutil.print_stacktrace(threads[0])
+
+    def recursive_inferior_crashing_registers(self):
+        """Test that lldb can read registers after crashing."""
+        exe = os.path.join(os.getcwd(), "a.out")
+        self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
+
+        self.runCmd("run", RUN_SUCCEEDED)
+        self.check_stop_reason()
+
+        # lldb should be able to read from registers from the inferior after crashing.
+        lldbplatformutil.check_first_register_readable(self)
+
+    def recursive_inferior_crashing_expr(self):
+        """Test that the lldb expression interpreter can read symbols after crashing."""
+        exe = os.path.join(os.getcwd(), "a.out")
+        self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
+
+        self.runCmd("run", RUN_SUCCEEDED)
+        self.check_stop_reason()
+
+        # The lldb expression interpreter should be able to read from addresses of the inferior after a crash.
+        self.expect("p i",
+            startstr = '(int) $0 =')
+
+    def recursive_inferior_crashing_step(self):
+        """Test that lldb functions correctly after stepping through a crash."""
+        exe = os.path.join(os.getcwd(), "a.out")
+        self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
+
+        self.set_breakpoint(self.line)
+        self.runCmd("run", RUN_SUCCEEDED)
+
+        self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
+            substrs = ['main.c:%d' % self.line,
+                       'stop reason = breakpoint'])
+
+        self.runCmd("next")
+        self.check_stop_reason()
+
+        # The lldb expression interpreter should be able to read from addresses of the inferior after a crash.
+        self.expect("p i",
+            substrs = ['(int) $0 ='])
+
+        # lldb should be able to read from registers from the inferior after crashing.
+        lldbplatformutil.check_first_register_readable(self)
+
+        # And it should report the correct line number.
+        self.expect("thread backtrace all",
+            substrs = ['main.c:%d' % self.line])
+
+    def recursive_inferior_crashing_step_after_break(self):
+        """Test that lldb behaves correctly when stepping after a crash."""
+        exe = os.path.join(os.getcwd(), "a.out")
+        self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
+
+        self.runCmd("run", RUN_SUCCEEDED)
+        self.check_stop_reason()
+
+        expected_state = 'exited' # Provide the exit code.
+        if self.platformIsDarwin():
+            expected_state = 'stopped' # TODO: Determine why 'next' and 'continue' have no effect after a crash.
+        elif re.match(".*-.*-.*-android", self.dbg.GetSelectedPlatform().GetTriple()):
+            expected_state = 'stopped' # android has a default SEGV handler, which will re-raise the signal, so we come up stopped again
+
+
+        self.expect("next",
+            substrs = ['Process', expected_state])
+
+        if expected_state == 'exited':
+            self.expect("thread list", error=True,substrs = ['Process must be launched'])
+        else:
+            self.check_stop_reason()
+
+    def recursive_inferior_crashing_expr_step_expr(self):
+        """Test that lldb expressions work before and after stepping after a crash."""
+        exe = os.path.join(os.getcwd(), "a.out")
+        self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
+
+        self.runCmd("run", RUN_SUCCEEDED)
+        self.check_stop_reason()
+
+        # The lldb expression interpreter should be able to read from addresses of the inferior after a crash.
+        self.expect("p null",
+            startstr = '(char *) $0 = 0x0')
+
+        self.runCmd("next")
+
+        # The lldb expression interpreter should be able to read from addresses of the inferior after a step.
+        self.expect("p null",
+            startstr = '(char *) $1 = 0x0')
+
+        self.check_stop_reason()