diff options
Diffstat (limited to 'docs/analyzer/checkers/newdelete_example.cpp')
-rw-r--r-- | docs/analyzer/checkers/newdelete_example.cpp | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/docs/analyzer/checkers/newdelete_example.cpp b/docs/analyzer/checkers/newdelete_example.cpp new file mode 100644 index 0000000000..b26ddcb3d9 --- /dev/null +++ b/docs/analyzer/checkers/newdelete_example.cpp @@ -0,0 +1,41 @@ +void f(int *p); + +void testUseMiddleArgAfterDelete(int *p) { + delete p; + f(p); // warn: use after free +} + +class SomeClass { +public: + void f(); +}; + +void test() { + SomeClass *c = new SomeClass; + delete c; + c->f(); // warn: use after free +} + +void test() { + int *p = (int *)__builtin_alloca(sizeof(int)); + delete p; // warn: deleting memory allocated by alloca +} + +void test() { + int *p = new int; + delete p; + delete p; // warn: attempt to free released +} + +void test() { + int i; + delete &i; // warn: delete address of local +} + +void test() { + int *p = new int[1]; + delete[] (++p); + // warn: argument to 'delete[]' is offset by 4 bytes + // from the start of memory allocated by 'new[]' +} + |