[analyzer] Invalidate destination of std::copy() and std::copy_backward().
Now that the libcpp implementations of these methods has a branch that doesn't call
memmove(), the analyzer needs to invalidate the destination for these methods explicitly.
rdar://problem/23575656
llvm-svn: 260043
diff --git a/clang/test/Analysis/bstring.cpp b/clang/test/Analysis/bstring.cpp
new file mode 100644
index 0000000..0b4e7e9
--- /dev/null
+++ b/clang/test/Analysis/bstring.cpp
@@ -0,0 +1,38 @@
+// RUN: %clang_cc1 -analyze -analyzer-checker=core,unix.cstring,alpha.unix.cstring,debug.ExprInspection -analyzer-store=region -verify %s
+
+#include "Inputs/system-header-simulator-cxx.h"
+#include "Inputs/system-header-simulator-for-malloc.h"
+
+void clang_analyzer_eval(int);
+
+int *testStdCopyInvalidatesBuffer(std::vector<int> v) {
+ int n = v.size();
+ int *buf = (int *)malloc(n * sizeof(int));
+
+ buf[0] = 66;
+
+ // Call to copy should invalidate buf.
+ std::copy(v.begin(), v.end(), buf);
+
+ int i = buf[0];
+
+ clang_analyzer_eval(i == 66); // expected-warning {{UNKNOWN}}
+
+ return buf;
+}
+
+int *testStdCopyBackwardInvalidatesBuffer(std::vector<int> v) {
+ int n = v.size();
+ int *buf = (int *)malloc(n * sizeof(int));
+
+ buf[0] = 66;
+
+ // Call to copy_backward should invalidate buf.
+ std::copy_backward(v.begin(), v.end(), buf + n);
+
+ int i = buf[0];
+
+ clang_analyzer_eval(i == 66); // expected-warning {{UNKNOWN}}
+
+ return buf;
+}