Adds a passing test for step-over and step-out when the inferior is about to call longjmp (non-local goto) in a single-threaded inferior.

llvm-svn: 186325

lldb/test/functionalities/longjmp/Makefile

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

lldb/test/functionalities/longjmp/TestLongjmp.py

@@ -0,0 +1,74 @@
+"""
+Test the use of setjmp/longjmp for non-local goto operations in a single-threaded inferior.
+"""
+
+import os
+import unittest2
+import lldb
+import lldbutil
+from lldbtest import *
+
+class LongjmpTestCase(TestBase):
+
+    mydir = os.path.join("functionalities", "longjmp")
+
+    def setUp(self):
+        TestBase.setUp(self)
+
+    def test_step_out(self):
+        """Test stepping when the inferior calls setjmp/longjmp, in particular, thread step-out."""
+        self.buildDefault()
+        self.step_out()
+
+    def test_step_over(self):
+        """Test stepping when the inferior calls setjmp/longjmp, in particular, thread step-over a longjmp."""
+        self.buildDefault()
+        self.step_over()
+
+    def test_step_back_out(self):
+        """Test stepping when the inferior calls setjmp/longjmp, in particular, thread step-out after thread step-in."""
+        self.buildDefault()
+        self.step_back_out()
+
+    def start_test(self, symbol):
+        exe = os.path.join(os.getcwd(), "a.out")
+
+        self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
+
+        # Break in main().
+        lldbutil.run_break_set_by_symbol (self, symbol, num_expected_locations=-1)
+
+        self.runCmd("run", RUN_SUCCEEDED)
+
+        # The stop reason of the thread should be breakpoint.
+        self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
+            substrs = ['stopped', 'stop reason = breakpoint'])
+
+    def step_out(self):
+        self.start_test("do_jump")
+
+        self.runCmd("thread step-out", RUN_SUCCEEDED)
+        self.expect("process status", PROCESS_STOPPED,
+            patterns = ['Process .* exited with status = 0'])
+
+    def step_over(self):
+        self.start_test("do_jump")
+
+        self.runCmd("thread step-over", RUN_SUCCEEDED)
+        self.expect("process status", PROCESS_STOPPED,
+            patterns = ['Process .* exited with status = 0'])
+
+    def step_back_out(self):
+        self.start_test("main")
+        
+        self.runCmd("thread step-over", RUN_SUCCEEDED)
+        self.runCmd("thread step-in", RUN_SUCCEEDED)
+        self.runCmd("thread step-out", RUN_SUCCEEDED)
+        self.expect("process status", PROCESS_STOPPED,
+            patterns = ['Process .* exited with status = 0'])
+
+if __name__ == '__main__':
+    import atexit
+    lldb.SBDebugger.Initialize()
+    atexit.register(lambda: lldb.SBDebugger.Terminate())
+    unittest2.main()

lldb/test/functionalities/longjmp/main.c

@@ -0,0 +1,27 @@
+//===-- main.c --------------------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+#include <setjmp.h>
+#include <stdio.h>
+
+jmp_buf j;
+
+void do_jump(void)
+{
+    longjmp(j, 1); // non-local goto
+}
+
+int main (void)
+{
+    if (setjmp(j) == 0)
+        do_jump();
+    else
+        return 0; // destination of longjmp
+
+    return 1;
+}