File: new-dynamic-types.cpp

package info (click to toggle)
llvm-toolchain-17 1%3A17.0.6-22
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 1,799,624 kB
  • sloc: cpp: 6,428,607; ansic: 1,383,196; asm: 793,408; python: 223,504; objc: 75,364; f90: 60,502; lisp: 33,869; pascal: 15,282; sh: 9,684; perl: 7,453; ml: 4,937; awk: 3,523; makefile: 2,889; javascript: 2,149; xml: 888; fortran: 619; cs: 573
file content (28 lines) | stat: -rw-r--r-- 526 bytes parent folder | download | duplicates (27) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
 
// RUN: %clang_analyze_cc1 -analyzer-checker=core -std=c++11 -verify %s

// expected-no-diagnostics

typedef __typeof(sizeof(int)) size_t;

void *operator new(size_t size, void *ptr);

struct B {
  virtual void foo();
};

struct D : public B {
  virtual void foo() override {}
};

void test_ub() {
  // FIXME: Potentially warn because this code is pretty weird.
  B b;
  new (&b) D;
  b.foo(); // no-crash
}

void test_non_ub() {
  char c[sizeof(D)]; // Should be enough storage.
  new (c) D;
  ((B *)c)->foo(); // no-crash
}