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[msan] Test for alloca handling.

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llvm-svn: 296051
This commit is contained in:
Evgeniy Stepanov 2017-02-24 00:13:28 +00:00
parent d1daf631f4
commit acc8ebb8e3
1 changed files with 25 additions and 0 deletions
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compiler-rt/test/msan/alloca.cc Normal file
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// RUN: %clangxx_msan -O0 -g %s -o %t && %run %t
// RUN: %clangxx_msan -O3 -g %s -o %t && %run %t
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <sanitizer/msan_interface.h>
int main(void) {
char *p = (char *)alloca(16);
assert(0 == __msan_test_shadow(p, 16));
assert(0 == __msan_test_shadow(p + 15, 1));
memset(p, 0, 16);
assert(-1 == __msan_test_shadow(p, 16));
volatile int x = 0;
char * volatile q = (char *)alloca(42 * x);
assert(-1 == __msan_test_shadow(p, 16));
int r[x];
int *volatile r2 = r;
assert(-1 == __msan_test_shadow(p, 16));
}