| /* 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" } } */ |