1 // RUN: %clang_cc1 -triple x86_64-apple-darwin9 -analyze -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 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); 35 int test2() { 36 int size; 37 if (takes_charptr((char*)&size)) 38 return -1; 39 return size; // no-warning 40 } 41 42