1*f4e8fbc5SAlexander Shaposhnikov // RUN: %clangxx_nsan -O0 -g %s -o %t 2*f4e8fbc5SAlexander Shaposhnikov // RUN: %run %t 2>&1 | FileCheck %s 3*f4e8fbc5SAlexander Shaposhnikov 4*f4e8fbc5SAlexander Shaposhnikov // RUN: %clangxx_nsan -O3 -g %s -o %t 5*f4e8fbc5SAlexander Shaposhnikov // RUN: %run %t 2>&1 | FileCheck %s 6*f4e8fbc5SAlexander Shaposhnikov 7*f4e8fbc5SAlexander Shaposhnikov #include <cstddef> 8*f4e8fbc5SAlexander Shaposhnikov 9*f4e8fbc5SAlexander Shaposhnikov #include "helpers.h" 10*f4e8fbc5SAlexander Shaposhnikov 11*f4e8fbc5SAlexander Shaposhnikov extern "C" void __nsan_dump_shadow_mem(const char *addr, size_t size_bytes, 12*f4e8fbc5SAlexander Shaposhnikov size_t bytes_per_line, size_t reserved); 13*f4e8fbc5SAlexander Shaposhnikov 14*f4e8fbc5SAlexander Shaposhnikov int main() { 15*f4e8fbc5SAlexander Shaposhnikov int size = 3 * sizeof(float); 16*f4e8fbc5SAlexander Shaposhnikov // Make sure we allocate dynamically: https://godbolt.org/z/T3h998. 17*f4e8fbc5SAlexander Shaposhnikov DoNotOptimize(size); 18*f4e8fbc5SAlexander Shaposhnikov float *array = reinterpret_cast<float *>(__builtin_alloca(size)); 19*f4e8fbc5SAlexander Shaposhnikov DoNotOptimize(array); 20*f4e8fbc5SAlexander Shaposhnikov array[0] = 1.0; 21*f4e8fbc5SAlexander Shaposhnikov array[1] = 2.0; 22*f4e8fbc5SAlexander Shaposhnikov // The third float is uninitialized. 23*f4e8fbc5SAlexander Shaposhnikov __nsan_dump_shadow_mem((const char *)array, 3 * sizeof(float), 16, 0); 24*f4e8fbc5SAlexander Shaposhnikov // CHECK: {{.*}} f0 f1 f2 f3 f0 f1 f2 f3 __ __ __ __ (1.00000000000000000000) (2.00000000000000000000) 25*f4e8fbc5SAlexander Shaposhnikov return 0; 26*f4e8fbc5SAlexander Shaposhnikov } 27