67 lines
1.8 KiB
C
67 lines
1.8 KiB
C
/* PR middle-end/91582 - missing heap overflow detection for strcpy
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Verify calls via function pointers.
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{ dg-do compile }
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{ dg-options "-O2 -Wall -Wno-array-bounds -ftrack-macro-expansion=0" } */
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typedef __attribute__ ((alloc_size (1))) char* allocfn_t (unsigned);
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extern allocfn_t allocfn;
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void sink (void*);
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void direct_call (void)
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{
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char *q = allocfn (0); // { dg-message "object of size 0 allocated by 'allocfn'" "note" }
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q[0] = 0; // { dg-warning "\\\[-Wstringop-overflow" }
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sink (q);
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}
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void local_ptr_call (void)
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{
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allocfn_t *ptr = allocfn;
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char *q = ptr (1); // { dg-message "at offset -1 into destination object of size 1 allocated by 'allocfn'" "note" }
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q[0] = 0;
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q[-1] = 0; // { dg-warning "\\\[-Wstringop-overflow" }
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sink (q);
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}
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void global_ptr_call (void)
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{
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extern allocfn_t *ptralloc;
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allocfn_t *ptr = ptralloc;
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char *q = ptr (2); // { dg-message "at offset 3 into destination object of size 2 allocated by 'ptralloc'" "note" }
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q[0] = 0;
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q[1] = 1;
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q[3] = 3; // { dg-warning "\\\[-Wstringop-overflow" }
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sink (q);
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}
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void global_ptr_array_call (void)
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{
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extern allocfn_t * (arralloc[]);
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allocfn_t *ptr = arralloc[0];
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char *q = ptr (2); // { dg-message "at offset 3 into destination object of size 2 allocated by 'ptr'" "note" }
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q[0] = 1;
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q[1] = 2;
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q[3] = 3; // { dg-warning "\\\[-Wstringop-overflow" }
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sink (q);
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}
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struct S { allocfn_t *ptralloc; };
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void member_ptr_call (struct S *p)
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{
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char *q = p->ptralloc (3); // { dg-message "at offset 5 into destination object of size 3 allocated by 'ptralloc'" "note" }
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q[0] = 0;
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q[1] = 1;
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q[2] = 2;
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q[5] = 0; // { dg-warning "\\\[-Wstringop-overflow" }
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sink (q);
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}
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