1 // RUN: %clang_analyze_cc1 -triple x86_64-apple-darwin9 -analyzer-checker=core,alpha.core -analyzer-store=region -verify %s
2 // expected-no-diagnostics
3
4 // PR 4164: http://llvm.org/bugs/show_bug.cgi?id=4164
5 //
6 // Eventually this should be pulled into misc-ps.m. This is in a separate test
7 // file for now to play around with the specific issues for BasicStoreManager
8 // and StoreManager (i.e., we can make a copy of this file for either
9 // StoreManager should one start to fail in the near future).
10 //
11 // The basic issue is that the VarRegion for 'size' is casted to (char*),
12 // resulting in an ElementRegion. 'getsockopt' is an unknown function that
13 // takes a void*, which means the ElementRegion should get stripped off.
14 typedef unsigned int __uint32_t;
15 typedef __uint32_t __darwin_socklen_t;
16 typedef __darwin_socklen_t socklen_t;
17 int getsockopt(int, int, int, void * restrict, socklen_t * restrict);
18
test1()19 int test1() {
20 int s = -1;
21 int size;
22 socklen_t size_len = sizeof(size);
23 if (getsockopt(s, 0xffff, 0x1001, (char *)&size, &size_len) < 0)
24 return -1;
25
26 return size; // no-warning
27 }
28
29 // Similar case: instead of passing a 'void*', we pass 'char*'. In this
30 // case we pass an ElementRegion to the invalidation logic. Since it is
31 // an ElementRegion that just layers on top of another typed region and the
32 // ElementRegion itself has elements whose type are integral (essentially raw
33 // data) we strip off the ElementRegion when doing the invalidation.
34 int takes_charptr(char* p);
test2()35 int test2() {
36 int size;
37 if (takes_charptr((char*)&size))
38 return -1;
39 return size; // no-warning
40 }
41
42