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/* This tests that when faced with two references to the same memory
location in the same basic block, the second reference should not
be instrumented by the Address Sanitizer. */
/* { dg-options "-fdump-tree-asan0" } */
/* { dg-do compile } */
/* { dg-skip-if "" { *-*-* } { "*" } { "-O0" } } */
extern char tab[4];
static int
test0 ()
{
/* __builtin___asan_report_store1 called 2 times for the two stores
below. */
tab[0] = 1;
tab[1] = 2;
/* __builtin___asan_report_load1 called 1 time for the store
below. */
char t0 = tab[1];
/* This load should not be instrumented because it is to the same
memory location as above. */
char t1 = tab[1];
return t0 + t1;
}
__attribute__((noinline, noclone)) static int
test1 (int i)
{
char foo[4] = {};
/*__builtin___asan_report_store1 called 1 time here to instrument
the initialization. */
foo[i] = 1;
/*__builtin___asan_report_store1 called 2 times here to instrument
the store to the memory region of tab. */
__builtin_memset (tab, 3, sizeof (tab));
/* There is no instrumentation for the two memset calls below. */
__builtin_memset (tab, 4, sizeof (tab));
__builtin_memset (tab, 5, sizeof (tab));
/* There are 2 calls to __builtin___asan_report_store1 and 2 calls
to __builtin___asan_report_load1 to instrument the store to
(subset of) the memory region of tab. */
__builtin_memcpy (&tab[1], foo + i, 3);
/* This should not generate a __builtin___asan_report_load1 because
the reference to tab[1] has been already instrumented above. */
return tab[1];
/* So for these function, there should be 7 calls to
__builtin___asan_report_store1. */
}
int
main ()
{
return test0 () && test1 (0);
}
/* { dg-final { scan-tree-dump-times "__builtin___asan_report_store1" 7 "asan0" } } */
/* { dg-final { scan-tree-dump-times "__builtin___asan_report_load" 2 "asan0" } } */
/* { dg-final { cleanup-tree-dump "asan0" } } */
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