Add a test to check that lldb reliably catches a crashing inferior (both command and Python API).

llvm-svn: 129542

lldb/test/inferior-crashing/Makefile

@@ -0,0 +1,5 @@
+LEVEL = ../make
+
+C_SOURCES := main.c
+
+include $(LEVEL)/Makefile.rules

lldb/test/inferior-crashing/TestInferiorCrashing.py

@@ -0,0 +1,79 @@
+"""Test that lldb reliably catches the inferior crashing."""
+
+import os, time
+import unittest2
+import lldb
+from lldbtest import *
+
+class CrashingInferiorTestCase(TestBase):
+
+    mydir = "inferior-crashing"
+
+    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    def test_inferior_crashing_dsym(self):
+        """Test that lldb reliably catches the inferior crashing (command)."""
+        self.buildDsym()
+        self.inferior_crashing()
+
+    def test_inferior_crashing_dwarf(self):
+        """Test that lldb reliably catches the inferior crashing (command)."""
+        self.buildDwarf()
+        self.inferior_crashing()
+
+    @python_api_test
+    def test_inferior_crashing_python(self):
+        """Test that lldb reliably catches the inferior crashing (Python API)."""
+        self.buildDefault()
+        self.inferior_crashing_python()
+
+    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 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 stop reason of the thread should be a bad access exception.
+        self.expect("thread list", STOPPED_DUE_TO_EXC_BAD_ACCESS,
+            substrs = ['state is stopped',
+                       'stop reason = EXC_BAD_ACCESS'])
+
+        # And it should report the correct line number.
+        self.expect("thread backtrace",
+            substrs = ['stop reason = EXC_BAD_ACCESS',
+                       'main.c:%d' % self.line])
+
+    def 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.IsValid(), VALID_TARGET)
+
+        # Now launch the process, and do not stop at entry point.
+        # Both argv and envp are null.
+        self.process = target.LaunchSimple(None, None, os.getcwd())
+
+        import lldbutil
+        if self.process.GetState() != lldb.eStateStopped:
+            self.fail("Process should be in the 'stopped' state, "
+                      "instead the actual state is: '%s'" %
+                      lldbutil.StateTypeString(self.process.GetState()))
+
+        thread = lldbutil.get_stopped_thread(self.process, lldb.eStopReasonException)
+        if not thread:
+            self.fail("Fail to stop the thread due to exception")
+
+        lldbutil.PrintStackTrace(thread)
+
+if __name__ == '__main__':
+    import atexit
+    lldb.SBDebugger.Initialize()
+    atexit.register(lambda: lldb.SBDebugger.Terminate())
+    unittest2.main()

lldb/test/inferior-crashing/main.c

@@ -0,0 +1,8 @@
+#include <stdio.h>
+
+int main(int argc, const char* argv[])
+{
+    int *null_ptr = 0;
+    printf("Hello, segfault!\n");
+    printf("Now crash %d\n", *null_ptr); // Crash here.
+}