vendor/clang/clang-trunk-r178860

1 files changed, 71 insertions, 0 deletions

diff --git a/test/Analysis/Malloc+MismatchedDeallocator+NewDelete.cpp b/test/Analysis/Malloc+MismatchedDeallocator+NewDelete.cpp
new file mode 100644
index 0000000000000..b0bb1735b4945
--- /dev/null
+++ b/test/Analysis/Malloc+MismatchedDeallocator+NewDelete.cpp
@@ -0,0 +1,71 @@
+// RUN: %clang_cc1 -analyze -analyzer-checker=core,unix.Malloc,unix.MismatchedDeallocator,alpha.cplusplus.NewDelete -analyzer-store region -std=c++11 -verify %s
+
+typedef __typeof(sizeof(int)) size_t;
+void *malloc(size_t);
+void free(void *);
+
+//--------------------------------------------------
+// Check that unix.Malloc catches all types of bugs.
+//--------------------------------------------------
+void testMallocDoubleFree() {
+  int *p = (int *)malloc(sizeof(int));
+  free(p);
+  free(p); // expected-warning{{Attempt to free released memory}}
+}
+
+void testMallocLeak() {
+  int *p = (int *)malloc(sizeof(int));
+} // expected-warning{{Memory is never released; potential leak of memory pointed to by 'p'}}
+
+void testMallocUseAfterFree() {
+  int *p = (int *)malloc(sizeof(int));
+  free(p);
+  int j = *p; // expected-warning{{Use of memory after it is freed}}
+}
+
+void testMallocBadFree() {
+  int i;
+  free(&i); // expected-warning{{Argument to free() is the address of the local variable 'i', which is not memory allocated by malloc()}}
+}
+
+void testMallocOffsetFree() {
+  int *p = (int *)malloc(sizeof(int));
+  free(++p); // expected-warning{{Argument to free() is offset by 4 bytes from the start of memory allocated by malloc()}}
+}
+
+//-----------------------------------------------------------------
+// Check that unix.MismatchedDeallocator catches all types of bugs.
+//-----------------------------------------------------------------
+void testMismatchedDeallocator() {
+  int *x = (int *)malloc(sizeof(int));
+  delete x; // expected-warning{{Memory allocated by malloc() should be deallocated by free(), not 'delete'}}
+}
+
+//----------------------------------------------------------------
+// Check that alpha.cplusplus.NewDelete catches all types of bugs.
+//----------------------------------------------------------------
+void testNewDoubleFree() {
+  int *p = new int;
+  delete p;
+  delete p; // expected-warning{{Attempt to free released memory}}
+}
+
+void testNewLeak() {
+  int *p = new int;
+} // expected-warning{{Memory is never released; potential leak of memory pointed to by 'p'}}
+
+void testNewUseAfterFree() {
+  int *p = (int *)operator new(0);
+  delete p;
+  int j = *p; // expected-warning{{Use of memory after it is freed}}
+}
+
+void testNewBadFree() {
+  int i;
+  delete &i; // expected-warning{{Argument to 'delete' is the address of the local variable 'i', which is not memory allocated by 'new'}}
+}
+
+void testNewOffsetFree() {
+  int *p = new int;
+  operator delete(++p); // expected-warning{{Argument to operator delete is offset by 4 bytes from the start of memory allocated by 'new'}}
+}