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[msan] Break optimization in memccpy tests

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After D116148 the memccpy gets optimized away and the expected
uninitialized memory access does not occur.

Make sure the call does not get optimized away.
This commit is contained in:
Nikita Popov 2021-12-22 14:43:52 +01:00
parent 7176799a7e
commit a9bb97e841
1 changed files with 2 additions and 0 deletions
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2
compiler-rt/lib/msan/tests/msan_test.cpp
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@ -1560,6 +1560,7 @@ TEST(MemorySanitizer, memccpy_nomatch_positive) {
char* y = new char[5];
strcpy(x, "abc");
EXPECT_UMR(memccpy(y, x, 'd', 5));
break_optimization(y);
delete[] x;
delete[] y;
}
@ -1570,6 +1571,7 @@ TEST(MemorySanitizer, memccpy_match_positive) {
x[0] = 'a';
x[2] = 'b';
EXPECT_UMR(memccpy(y, x, 'b', 5));
break_optimization(y);
delete[] x;
delete[] y;
}