1 // Test shadow faults during esan initialization as well as 2 // faults during dlsym's calloc during interceptor init. 3 // 4 // RUN: %clang_esan_wset %s -o %t 5 // RUN: %run %t 2>&1 | FileCheck %s 6 7 #include <stdio.h> 8 #include <stdlib.h> 9 #include <string.h> 10 11 // Our goal is to emulate an instrumented allocator, whose calloc 12 // invoked from dlsym will trigger shadow faults, to test an 13 // early shadow fault during esan interceptor init. 14 // We do this by replacing calloc: 15 void *calloc(size_t size, size_t n) { 16 // Unfortunately we can't print anything to make the test 17 // ensure we got here b/c the sanitizer interceptors can't 18 // handle that during interceptor init. 19 20 // Ensure we trigger a shadow write fault: 21 int x[16]; 22 x[0] = size; 23 // Now just emulate calloc. 24 void *res = malloc(size*n); 25 memset(res, 0, size*n); 26 return res; 27 } 28 29 int main(int argc, char **argv) { 30 printf("all done\n"); 31 return 0; 32 } 33 // CHECK: all done 34
