45 lines · cpp
1// RUN: %clang_msan -Wno-alloc-size -fsanitize-recover=memory %s -o %t && not %run %t 2>&1 \2// RUN: | FileCheck %s --check-prefix=CHECK3// RUN: %clang_msan -Wno-alloc-size -fsanitize-recover=memory -fsanitize-memory-track-origins=1 %s -o %t && not %run %t 2>&1 \4// RUN: | FileCheck %s --check-prefixes=CHECK,DISCOUNT5// RUN: %clang_msan -Wno-alloc-size -fsanitize-recover=memory -fsanitize-memory-track-origins=2 %s -o %t && not %run %t 2>&1 \6// RUN: | FileCheck %s --check-prefixes=CHECK,ORIGINS7 8#include <stdio.h>9#include <stdlib.h>10 11int main(int argc, char **argv) {12 {13 char *p1 = (char *)calloc(1, 0);14 printf("p1 is %p\n", p1);15 printf("Content of p1 is: %d\n", *p1);16 // CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value17 // CHECK: {{#0 0x.* in main .*zero_alloc.cpp:}}[[@LINE-2]]18 // DISCOUNT,ORIGINS: Uninitialized value is outside of heap allocation19 free(p1);20 }21 22 {23 char *p2 = (char *)calloc(0, 1);24 printf("p2 is %p\n", p2);25 printf("Content of p2 is: %d\n", *p2);26 // CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value27 // CHECK: {{#0 0x.* in main .*zero_alloc.cpp:}}[[@LINE-2]]28 // DISCOUNT,ORIGINS: Uninitialized value is outside of heap allocation29 free(p2);30 }31 32 {33 char *p3 = (char *)malloc(0);34 printf("p3 is %p\n", p3);35 printf("Content of p2 is: %d\n", *p3);36 // CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value37 // CHECK: {{#0 0x.* in main .*zero_alloc.cpp:}}[[@LINE-2]]38 // DISCOUNT: Uninitialized value was created by a heap allocation39 // ORIGINS: Uninitialized value is outside of heap allocation40 free(p3);41 }42 43 return 0;44}45