| // Test shadow faults during esan initialization as well as |
| // faults during dlsym's calloc during interceptor init. |
| // |
| // RUN: %clang_esan_wset %s -o %t |
| // RUN: %run %t 2>&1 | FileCheck %s |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| // Our goal is to emulate an instrumented allocator, whose calloc |
| // invoked from dlsym will trigger shadow faults, to test an |
| // early shadow fault during esan interceptor init. |
| // We do this by replacing calloc: |
| void *calloc(size_t size, size_t n) { |
| // Unfortunately we can't print anything to make the test |
| // ensure we got here b/c the sanitizer interceptors can't |
| // handle that during interceptor init. |
| |
| // Ensure we trigger a shadow write fault: |
| int x[16]; |
| x[0] = size; |
| // Now just emulate calloc. |
| void *res = malloc(size*n); |
| memset(res, 0, size*n); |
| return res; |
| } |
| |
| int main(int argc, char **argv) { |
| printf("all done\n"); |
| return 0; |
| } |
| // CHECK: all done |
