[analyzer] Enabled unix.Malloc checker.

+ Refactoring.

llvm-svn: 178388

1 files changed, 59 insertions, 0 deletions

diff --git a/clang/test/Analysis/NewDelete-intersections.mm b/clang/test/Analysis/NewDelete-intersections.mm
new file mode 100644
index 00000000000..a61d31381be
--- /dev/null
+++ b/clang/test/Analysis/NewDelete-intersections.mm
@@ -0,0 +1,59 @@
+// RUN: %clang_cc1 -analyze -analyzer-checker=core,cplusplus.NewDelete -analyzer-store region -std=c++11 -fblocks -verify %s
+#include "Inputs/system-header-simulator-cxx.h"
+#include "Inputs/system-header-simulator-objc.h"
+
+typedef __typeof__(sizeof(int)) size_t;
+extern "C" void *malloc(size_t);
+extern "C" void free(void *);
+//int *global;
+
+//----------------------------------------------------------------------------
+// Check for intersections with unix.Malloc and unix.MallocWithAnnotations 
+// checkers bounded with cplusplus.NewDelete.
+//----------------------------------------------------------------------------
+
+// malloc()/free() are subjects of unix.Malloc and unix.MallocWithAnnotations
+void testMallocFreeNoWarn() {
+  int i;
+  free(&i); // no warn
+
+  int *p1 = (int *)malloc(sizeof(int));
+  free(++p1); // no warn
+
+  int *p2 = (int *)malloc(sizeof(int));
+  free(p2);
+  free(p2); // no warn
+
+  int *p3 = (int *)malloc(sizeof(int)); // no warn
+}
+
+//----- Test free standard new
+void testFreeOpNew() {
+  void *p = operator new(0);
+  free(p);
+} // expected-warning{{Memory is never released; potential leak}}
+// FIXME: Pointer should escape
+
+void testFreeNewExpr() {
+  int *p = new int;
+  free(p);
+} // expected-warning{{Memory is never released; potential leak}}
+// FIXME: Pointer should escape
+
+void testObjcFreeNewed() {
+  int *p = new int;
+  NSData *nsdata = [NSData dataWithBytesNoCopy:p length:sizeof(int) freeWhenDone:1]; // expected-warning{{Memory is never released; potential leak}}
+}
+// FIXME: Pointer should escape
+
+void testFreeAfterDelete() {
+  int *p = new int;  
+  delete p;
+  free(p); // expected-warning{{Use of memory after it is freed}}
+}
+
+void testStandardPlacementNewAfterDelete() {
+  int *p = new int;  
+  delete p;
+  p = new(p) int; // expected-warning{{Use of memory after it is freed}}
+}