1 #define _GNU_SOURCE 2 #include <stdio.h> 3 #include <pthread.h> 4 #include <string.h> 5 #include <stdlib.h> 6 #include <sys/prctl.h> 7 #include <sys/types.h> 8 #include <unistd.h> 9 #include <assert.h> 10 11 static pthread_t children[3]; 12 13 void bad_things(int offset) 14 { 15 char* m = malloc(sizeof(char)*offset); 16 m[offset] = 0; 17 free(m); 18 } 19 20 void* child_fn_2 ( void* arg ) 21 { 22 const char* threadname = "012345678901234"; 23 24 pthread_setname_np(pthread_self(), threadname); 25 26 bad_things(4); 27 28 return NULL; 29 } 30 31 void* child_fn_1 ( void* arg ) 32 { 33 const char* threadname = "try1"; 34 int r; 35 36 pthread_setname_np(pthread_self(), threadname); 37 38 bad_things(3); 39 40 r = pthread_create(&children[2], NULL, child_fn_2, NULL); 41 assert(!r); 42 43 r = pthread_join(children[2], NULL); 44 assert(!r); 45 46 return NULL; 47 } 48 49 void* child_fn_0 ( void* arg ) 50 { 51 int r; 52 53 bad_things(2); 54 55 r = pthread_create(&children[1], NULL, child_fn_1, NULL); 56 assert(!r); 57 58 r = pthread_join(children[1], NULL); 59 assert(!r); 60 61 return NULL; 62 } 63 64 int main(int argc, const char** argv) 65 { 66 int r; 67 68 bad_things(1); 69 70 r = pthread_create(&children[0], NULL, child_fn_0, NULL); 71 assert(!r); 72 73 r = pthread_join(children[0], NULL); 74 assert(!r); 75 76 bad_things(5); 77 78 return 0; 79 } 80 81
