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comparison gcc/testsuite/c-c++-common/asan/no-redundant-instrumentation-1.c @ 111:04ced10e8804

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gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
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68:561a7518be6b 111:04ced10e8804
1 /* This tests that when faced with two references to the same memory
2 location in the same basic block, the second reference should not
3 be instrumented by the Address Sanitizer. */
4
5 /* { dg-options "-fdump-tree-sanopt" } */
6 /* { dg-do compile } */
7 /* { dg-skip-if "" { *-*-* } { "*" } { "-O0" } } */
8
9 extern char tab[6];
10
11 static int
12 test0 ()
13 {
14 /* __builtin___asan_report_store1 called 2 times for the two stores
15 below. */
16 tab[0] = 1;
17 tab[1] = 2;
18
19 /* This load should not be instrumented because it is to the same
20 memory location as above. */
21 char t0 = tab[1];
22
23 /* Likewise. */
24 char t1 = tab[1];
25
26 return t0 + t1;
27 }
28
29 __attribute__((noinline, noclone)) static int
30 test1 (int i)
31 {
32 char foo[4] = {};
33
34 /*__builtin___asan_report_store1 called 1 time here to instrument
35 the initialization. */
36 foo[i] = 1;
37
38 /* Instrument tab memory region. */
39 __builtin_memset (tab, 3, sizeof (tab));
40
41 /* Instrument tab[1] with access size 3. */
42 __builtin_memcpy (&tab[1], foo + i, 3);
43
44 /* This should not generate a __builtin___asan_report_load1 because
45 the reference to tab[1] has been already instrumented above. */
46 return tab[1];
47
48 /* So for these functions, there should be 3 calls to
49 __builtin___asan_report_store1. */
50 }
51
52 int
53 main ()
54 {
55 return test0 () && test1 (0);
56 }
57
58 /* { dg-final { scan-tree-dump-times "__builtin___asan_report_store1" 3 "sanopt" } } */
59 /* { dg-final { scan-tree-dump-not "__builtin___asan_report_load1" "sanopt" } } */