Add a repro case for bug llvm.org/pr24702

llvm-svn: 246845

lldb/test/functionalities/jitloader_gdb/Makefile

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

lldb/test/functionalities/jitloader_gdb/TestJITLoaderGDB.py

@@ -0,0 +1,50 @@
+"""Test for the JITLoaderGDB interface"""
+
+import os
+import unittest2
+import lldb
+from lldbtest import *
+import lldbutil
+import re
+
+
+class JITLoaderGDBTestCase(TestBase):
+
+    mydir = TestBase.compute_mydir(__file__)
+
+    @skipTestIfFn(lambda x: True, "llvm.org/pr24702", "Skipped because the test crashes the test runner")
+    @unittest2.expectedFailure("llvm.org/pr24702")
+    @dsym_test
+    def test_bogus_values_with_dsym(self):
+        self.buildDsym()
+        self.bogus_values_test()
+
+    @skipTestIfFn(lambda x: True, "llvm.org/pr24702", "Skipped because the test crashes the test runner")
+    @unittest2.expectedFailure("llvm.org/pr24702")
+    @dwarf_test
+    def test_bogus_values_with_dwarf(self):
+        self.buildDwarf()
+        self.bogus_values_test()
+
+    def bogus_values_test(self):
+        """Test that we handle inferior misusing the GDB JIT interface"""
+        exe = os.path.join(os.getcwd(), "a.out")
+
+        # Create a target by the debugger.
+        target = self.dbg.CreateTarget(exe)
+        self.assertTrue(target, VALID_TARGET)
+
+        # launch the process, do not stop at entry point.
+        process = target.LaunchSimple(None, None, self.get_process_working_directory())
+        self.assertTrue(process, PROCESS_IS_VALID)
+
+        # The inferior will now pass bogus values over the interface. Make sure we don't crash.
+
+        self.assertEqual(process.GetState(), lldb.eStateExited)
+        self.assertEqual(process.GetExitStatus(), 0)
+
+if __name__ == '__main__':
+    import atexit
+    lldb.SBDebugger.Initialize()
+    atexit.register(lambda: lldb.SBDebugger.Terminate())
+    unittest2.main()

lldb/test/functionalities/jitloader_gdb/main.c

@@ -0,0 +1,44 @@
+#include <inttypes.h>
+
+// GDB JIT interface
+enum JITAction { JIT_NOACTION, JIT_REGISTER_FN, JIT_UNREGISTER_FN };
+
+struct JITCodeEntry
+{
+    struct JITCodeEntry* next;
+    struct JITCodeEntry* prev;
+    const char *symfile_addr;
+    uint64_t symfile_size;
+};
+
+struct JITDescriptor
+{
+    uint32_t version;
+    uint32_t action_flag;
+    struct JITCodeEntry* relevant_entry;
+    struct JITCodeEntry* first_entry;
+};
+
+struct JITDescriptor __jit_debug_descriptor = { 1, JIT_NOACTION, 0, 0 };
+
+void __jit_debug_register_code()
+{
+}
+// end GDB JIT interface
+
+struct JITCodeEntry entry;
+
+int main()
+{
+    // Create a code entry with a bogus size
+    entry.next = entry.prev = 0;
+    entry.symfile_addr = (char *)&entry;
+    entry.symfile_size = (uint64_t)47<<32;
+
+    __jit_debug_descriptor.relevant_entry = __jit_debug_descriptor.first_entry = &entry;
+    __jit_debug_descriptor.action_flag = JIT_REGISTER_FN;
+
+    __jit_debug_register_code();
+
+    return 0;
+}