| // RUN: %clang_analyze_cc1 -triple x86_64-apple-darwin9 -analyzer-checker=core,alpha.core -analyzer-store=region -verify %s |
| // expected-no-diagnostics |
| |
| // PR 4164: http://llvm.org/bugs/show_bug.cgi?id=4164 |
| // |
| // Eventually this should be pulled into misc-ps.m. This is in a separate test |
| // file for now to play around with the specific issues for BasicStoreManager |
| // and StoreManager (i.e., we can make a copy of this file for either |
| // StoreManager should one start to fail in the near future). |
| // |
| // The basic issue is that the VarRegion for 'size' is casted to (char*), |
| // resulting in an ElementRegion. 'getsockopt' is an unknown function that |
| // takes a void*, which means the ElementRegion should get stripped off. |
| typedef unsigned int __uint32_t; |
| typedef __uint32_t __darwin_socklen_t; |
| typedef __darwin_socklen_t socklen_t; |
| int getsockopt(int, int, int, void * restrict, socklen_t * restrict); |
| |
| int test1() { |
| int s = -1; |
| int size; |
| socklen_t size_len = sizeof(size); |
| if (getsockopt(s, 0xffff, 0x1001, (char *)&size, &size_len) < 0) |
| return -1; |
| |
| return size; // no-warning |
| } |
| |
| // Similar case: instead of passing a 'void*', we pass 'char*'. In this |
| // case we pass an ElementRegion to the invalidation logic. Since it is |
| // an ElementRegion that just layers on top of another typed region and the |
| // ElementRegion itself has elements whose type are integral (essentially raw |
| // data) we strip off the ElementRegion when doing the invalidation. |
| int takes_charptr(char* p); |
| int test2() { |
| int size; |
| if (takes_charptr((char*)&size)) |
| return -1; |
| return size; // no-warning |
| } |
| |