Added support for pulling Objective-C class symbols

out of the runtime.  This allows calling static methods
on classes whose symbols have been stripped out of the
binary.

<rdar://problem/12042992>


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@180210 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 116 insertions, 0 deletions

diff --git a/test/lang/objc/objc-static-method-stripped/Makefile b/test/lang/objc/objc-static-method-stripped/Makefile
new file mode 100644
index 000000000..81e7f12de
--- /dev/null
+++ b/test/lang/objc/objc-static-method-stripped/Makefile
@@ -0,0 +1,15 @@
+LEVEL = ../../../make
+
+OBJC_SOURCES := static.m
+LDFLAGS = $(CFLAGS) -lobjc -framework Foundation
+
+default:        a.out.stripped
+
+a.out.stripped: a.out.dSYM
+	strip -o a.out.stripped a.out
+
+clean::
+	rm -f a.out.stripped
+	rm -rf a.out.stripped.dSYM
+
+include $(LEVEL)/Makefile.rules
diff --git a/test/lang/objc/objc-static-method-stripped/TestObjCStaticMethodStripped.py b/test/lang/objc/objc-static-method-stripped/TestObjCStaticMethodStripped.py
new file mode 100644
index 000000000..bf7e05931
--- /dev/null
+++ b/test/lang/objc/objc-static-method-stripped/TestObjCStaticMethodStripped.py
@@ -0,0 +1,72 @@
+"""Test calling functions in static methods with a stripped binary."""
+
+import os, time
+import unittest2
+import lldb
+import lldbutil
+from lldbtest import *
+
+class TestObjCStaticMethodStripped(TestBase):
+
+    mydir = os.path.join("lang", "objc", "objc-static-method-stripped")
+
+    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @python_api_test
+    #<rdar://problem/12042992>
+    @dsym_test
+    def test_with_dsym_and_python_api(self):
+        """Test calling functions in static methods with a stripped binary."""
+        if self.getArchitecture() == 'i386':
+            self.skipTest("requires modern objc runtime")
+        self.buildDsym()
+        self.objc_static_method_stripped()
+
+    def setUp(self):
+        # Call super's setUp().
+        TestBase.setUp(self)
+        # Find the line numbers to break inside main().
+        self.main_source = "static.m"
+        self.break_line = line_number(self.main_source, '// Set breakpoint here.')
+
+    #<rdar://problem/12042992>
+    def objc_static_method_stripped(self):
+        """Test calling functions in static methods with a stripped binary."""
+        exe = os.path.join(os.getcwd(), "a.out.stripped")
+
+        target = self.dbg.CreateTarget(exe)
+        self.assertTrue(target, VALID_TARGET)
+
+        bpt = target.BreakpointCreateByLocation(self.main_source, self.break_line)
+        self.assertTrue(bpt, VALID_BREAKPOINT)
+
+        # Now launch the process, and do not stop at entry point.
+        process = target.LaunchSimple (None, None, os.getcwd())
+
+        self.assertTrue(process, PROCESS_IS_VALID)
+
+        # The stop reason of the thread should be breakpoint.
+        thread_list = lldbutil.get_threads_stopped_at_breakpoint (process, bpt)
+
+        # Make sure we stopped at the first breakpoint.
+        self.assertTrue (len(thread_list) != 0, "No thread stopped at our breakpoint.")
+        self.assertTrue (len(thread_list) == 1, "More than one thread stopped at our breakpoint.")
+            
+        # Now make sure we can call a function in the static method we've stopped in.
+        frame = thread_list[0].GetFrameAtIndex(0)
+        self.assertTrue (frame, "Got a valid frame 0 frame.")
+
+        cmd_value = frame.EvaluateExpression ("(char *) sel_getName (_cmd)")
+        self.assertTrue (cmd_value.IsValid())
+        sel_name = cmd_value.GetSummary()
+        self.assertTrue (sel_name == "\"doSomethingWithString:\"", "Got the right value for the selector as string.")
+
+        cmd_value = frame.EvaluateExpression ("[Foo doSomethingElseWithString:string]")
+        self.assertTrue (cmd_value.IsValid())
+        string_length = cmd_value.GetValueAsUnsigned()
+        self.assertTrue (string_length == 27, "Got the right value from another class method on the same class.")
+
+if __name__ == '__main__':
+    import atexit
+    lldb.SBDebugger.Initialize()
+    atexit.register(lambda: lldb.SBDebugger.Terminate())
+    unittest2.main()
diff --git a/test/lang/objc/objc-static-method-stripped/static.m b/test/lang/objc/objc-static-method-stripped/static.m
new file mode 100644
index 000000000..ec7b2ef67
--- /dev/null
+++ b/test/lang/objc/objc-static-method-stripped/static.m
@@ -0,0 +1,29 @@
+#import <Foundation/Foundation.h>
+
+@interface Foo : NSObject
++(void) doSomethingWithString: (NSString *) string;
+-(void) doSomethingWithNothing;
+@end
+
+@implementation Foo
++(void) doSomethingWithString: (NSString *) string
+{
+  NSLog (@"String is: %@.", string); // Set breakpoint here.
+}
+
++(int) doSomethingElseWithString: (NSString *) string
+{
+  NSLog (@"String is still: %@.", string);
+  return [string length];
+}
+
+-(void) doSomethingWithNothing
+{
+}
+@end
+
+int main()
+{
+  [Foo doSomethingWithString: @"Some string I have in mind."];
+  return 0;
+}