forked from OSchip/llvm-project
42 lines
1.7 KiB
C
42 lines
1.7 KiB
C
// RUN: %clang_cc1 -triple x86_64-apple-darwin9 -analyze -analyzer-experimental-internal-checks -checker-cfref -analyzer-store=basic -verify %s
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// RUN: %clang_cc1 -triple x86_64-apple-darwin9 -analyze -analyzer-experimental-internal-checks -checker-cfref -analyzer-store=region -verify %s
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// PR 4164: http://llvm.org/bugs/show_bug.cgi?id=4164
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//
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// Eventually this should be pulled into misc-ps.m. This is in a separate test
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// file for now to play around with the specific issues for BasicStoreManager
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// and StoreManager (i.e., we can make a copy of this file for either
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// StoreManager should one start to fail in the near future).
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//
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// The basic issue is that the VarRegion for 'size' is casted to (char*),
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// resulting in an ElementRegion. 'getsockopt' is an unknown function that
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// takes a void*, which means the ElementRegion should get stripped off.
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typedef unsigned int __uint32_t;
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typedef __uint32_t __darwin_socklen_t;
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typedef __darwin_socklen_t socklen_t;
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int getsockopt(int, int, int, void * restrict, socklen_t * restrict);
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int test1() {
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int s = -1;
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int size;
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socklen_t size_len = sizeof(size);
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if (getsockopt(s, 0xffff, 0x1001, (char *)&size, &size_len) < 0)
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return -1;
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return size; // no-warning
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}
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// Similar case: instead of passing a 'void*', we pass 'char*'. In this
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// case we pass an ElementRegion to the invalidation logic. Since it is
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// an ElementRegion that just layers on top of another typed region and the
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// ElementRegion itself has elements whose type are integral (essentially raw
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// data) we strip off the ElementRegion when doing the invalidation.
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int takes_charptr(char* p);
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int test2() {
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int size;
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if (takes_charptr((char*)&size))
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return -1;
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return size; // no-warning
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}
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