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authorpatrick <patrick@openbsd.org>2020-08-03 14:31:31 +0000
committerpatrick <patrick@openbsd.org>2020-08-03 14:31:31 +0000
commite5dd70708596ae51455a0ffa086a00c5b29f8583 (patch)
tree5d676f27b570bacf71e786c3b5cff3e6f6679b59 /gnu/llvm/clang/docs/analyzer/checkers/mismatched_deallocator_example.cpp
parentImport LLVM 10.0.0 release including clang, lld and lldb. (diff)
downloadwireguard-openbsd-e5dd70708596ae51455a0ffa086a00c5b29f8583.tar.xz
wireguard-openbsd-e5dd70708596ae51455a0ffa086a00c5b29f8583.zip
Import LLVM 10.0.0 release including clang, lld and lldb.
ok hackroom tested by plenty
Diffstat (limited to 'gnu/llvm/clang/docs/analyzer/checkers/mismatched_deallocator_example.cpp')
-rw-r--r--gnu/llvm/clang/docs/analyzer/checkers/mismatched_deallocator_example.cpp56
1 files changed, 56 insertions, 0 deletions
diff --git a/gnu/llvm/clang/docs/analyzer/checkers/mismatched_deallocator_example.cpp b/gnu/llvm/clang/docs/analyzer/checkers/mismatched_deallocator_example.cpp
new file mode 100644
index 00000000000..2a4103240fe
--- /dev/null
+++ b/gnu/llvm/clang/docs/analyzer/checkers/mismatched_deallocator_example.cpp
@@ -0,0 +1,56 @@
+// C, C++
+void test() {
+ int *p = (int *)malloc(sizeof(int));
+ delete p; // warn
+}
+
+// C, C++
+void __attribute((ownership_returns(malloc))) *user_malloc(size_t);
+
+void test() {
+ int *p = (int *)user_malloc(sizeof(int));
+ delete p; // warn
+}
+
+// C, C++
+void test() {
+ int *p = new int;
+ free(p); // warn
+}
+
+// C, C++
+void test() {
+ int *p = new int[1];
+ realloc(p, sizeof(long)); // warn
+}
+
+// C, C++
+template <typename T>
+struct SimpleSmartPointer {
+ T *ptr;
+
+ explicit SimpleSmartPointer(T *p = 0) : ptr(p) {}
+ ~SimpleSmartPointer() {
+ delete ptr; // warn
+ }
+};
+
+void test() {
+ SimpleSmartPointer<int> a((int *)malloc(4));
+}
+
+// C++
+void test() {
+ int *p = (int *)operator new(0);
+ delete[] p; // warn
+}
+
+// Objective-C, C++
+void test(NSUInteger dataLength) {
+ int *p = new int;
+ NSData *d = [NSData dataWithBytesNoCopy:p
+ length:sizeof(int) freeWhenDone:1];
+ // warn +dataWithBytesNoCopy:length:freeWhenDone: cannot take
+ // ownership of memory allocated by 'new'
+}
+