Added a C language test case that verifies that

DWARF types and types from modules can coexist even
if they have the same name and refer to two different
things.

<rdar://problem/18805055>

llvm-svn: 233988

lldb/test/lang/c/modules/Makefile

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

lldb/test/lang/c/modules/TestCModules.py

@@ -0,0 +1,81 @@
+"""Test that importing modules in C works as expected."""
+
+import os, time
+import unittest2
+import lldb
+import platform
+import lldbutil
+
+from distutils.version import StrictVersion
+
+from lldbtest import *
+
+class CModulesTestCase(TestBase):
+
+    mydir = TestBase.compute_mydir(__file__)
+
+    @skipUnlessDarwin
+    @dsym_test
+    def test_expr_with_dsym(self):
+        self.buildDsym()
+        self.expr()
+
+    @dwarf_test
+    @skipIfFreeBSD
+    @skipIfLinux
+    def test_expr_with_dwarf(self):
+        self.buildDwarf()
+        self.expr()
+
+    def setUp(self):
+        # Call super's setUp().
+        TestBase.setUp(self)
+        # Find the line number to break inside main().
+        self.line = line_number('main.c', '// Set breakpoint 0 here.')
+
+    def applies(self):
+        if platform.system() != "Darwin":
+            return False
+        if StrictVersion('12.0.0') > platform.release():
+            return False
+
+        return True
+
+    def common_setup(self):
+        exe = os.path.join(os.getcwd(), "a.out")
+        self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
+
+        # Break inside the foo function which takes a bar_ptr argument.
+        lldbutil.run_break_set_by_file_and_line (self, "main.c", self.line, num_expected_locations=1, loc_exact=True)
+
+        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'])
+
+        # The breakpoint should have a hit count of 1.
+        self.expect("breakpoint list -f", BREAKPOINT_HIT_ONCE,
+            substrs = [' resolved, hit count = 1'])
+
+    def expr(self):
+        if not self.applies():
+            return
+
+        self.common_setup()
+
+        self.expect("expr @import Darwin; 3", VARIABLES_DISPLAYED_CORRECTLY,
+            substrs = ["int", "3"])
+
+        self.expect("expr *fopen(\"/dev/zero\", \"w\")", VARIABLES_DISPLAYED_CORRECTLY,
+            substrs = ["FILE", "_close", "__sclose"])
+
+        self.expect("expr *myFile", VARIABLES_DISPLAYED_CORRECTLY,
+            substrs = ["a", "5", "b", "9"])
+            
+if __name__ == '__main__':
+    import atexit
+    lldb.SBDebugger.Initialize()
+    atexit.register(lambda: lldb.SBDebugger.Terminate())
+    unittest2.main()

lldb/test/lang/c/modules/main.c

@@ -0,0 +1,20 @@
+#include <stdlib.h>
+
+int printf(const char * restrict format, ...);
+
+typedef struct {
+    int a;
+    int b;
+} FILE;
+
+int main()
+{
+    FILE *myFile = malloc(sizeof(FILE));
+
+    myFile->a = 5;
+    myFile->b = 9;
+
+    printf("%d\n", myFile->a + myFile->b); // Set breakpoint 0 here.
+
+    free(myFile);
+}