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// RUN: %clangxx_asan -O0 -mllvm -asan-instrument-allocas %s -o %t
// RUN: %run %t 2>&1
//
// REQUIRES: stable-runtime
// This testcase checks that allocas and VLAs inside loop are correctly unpoisoned.
#include <assert.h>
#include <stdint.h>
#include <stdlib.h>
#include "sanitizer/asan_interface.h"
// MSVC provides _alloca instead of alloca.
#if defined(_MSC_VER) && !defined(alloca)
# define alloca _alloca
#endif
void *top, *bot;
__attribute__((noinline)) void foo(int len) {
char x;
top = &x;
char array[len]; // NOLINT
assert(!(reinterpret_cast<uintptr_t>(array) & 31L));
alloca(len);
for (int i = 0; i < 32; ++i) {
char array[i]; // NOLINT
bot = alloca(i);
assert(!(reinterpret_cast<uintptr_t>(bot) & 31L));
}
}
int main(int argc, char **argv) {
foo(32);
void *q = __asan_region_is_poisoned(bot, (char *)top - (char *)bot);
assert(!q);
return 0;
}
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