1 #include <string.h> 2 #include <pthread.h> 3 #include <stdlib.h> 4 #include <stdio.h> 5 #include <fcntl.h> 6 #include <unistd.h> 7 #include <sys/types.h> 8 #include <sys/syscall.h> 9 #include "../memcheck/memcheck.h" 10 int using_threads = 0; /* test collision with a global in gdbserver */ 11 /* we will undefine one char on two */ 12 static char undefined[10] = "undefined"; 13 14 #define LOOPS 10000000 15 static int loopmain, loopt1, loopt2; 16 17 static double pi = 3.14159265358979323846264338327950288; 18 19 static pid_t gettid() 20 { 21 #ifdef __NT_gettid 22 return syscall(__NR_gettid); 23 #else 24 return getpid(); 25 #endif 26 } 27 static void whoami(char *msg) 28 { 29 printf("pid %d Thread %d %s\n", getpid(), gettid(), msg); fflush(stdout); 30 } 31 32 static int int_und; 33 static int sleeps = 15; 34 static void make_error (char *s) 35 { 36 char *make_error_name __attribute__((unused)) = "make_error name"; 37 char c __attribute__((unused)); 38 double pi2 __attribute__((unused)) = 2.0 * pi; 39 whoami(s); 40 if (int_und == 0) 41 printf ("%s int_und is zero %d\n", s, int_und); 42 else 43 printf ("%s int_und is not zero\n", s); 44 fflush(stdout); 45 } 46 47 static void level () 48 { 49 char *level_name __attribute__((unused)) = "level name"; 50 make_error ("called from level"); 51 } 52 53 static void loops (int *loopnr) 54 { 55 int i, j; 56 for (i = 0; i < LOOPS; i++) 57 for (j = 0; j < LOOPS; j++) 58 (*loopnr)++; 59 } 60 61 static void *brussels_fn(void *v) 62 { 63 char *brussels_name __attribute__((unused)) = "Brussels"; 64 make_error ("called from Brussels"); 65 loopt1 = 1; 66 while (! (loopt1 && loopt2 && loopmain)) 67 loopt1++; 68 loops (&loopt1); 69 return NULL; 70 } 71 static void *london_fn(void *v) 72 { 73 char *london_name __attribute__((unused)) = "London"; 74 make_error ("called from London"); 75 loopt2 = 1; 76 while (! (loopt1 && loopt2 && loopmain)) 77 loopt2++; 78 loops (&loopt2); 79 sleep(10); 80 return NULL; 81 } 82 static void *petaouchnok_fn(void *v) 83 { 84 char *petaouchnok_name __attribute__((unused)) = "Petaouchnok"; 85 struct timeval t; 86 int i; 87 for (i = 1; i <= sleeps; i++) { 88 t.tv_sec = 5; 89 t.tv_usec = 0; 90 fprintf (stderr, "Petaouchnok sleep nr %d out of %d sleeping 5 seconds\n", 91 i, sleeps); 92 fflush(stderr); 93 select (0, NULL, NULL, NULL, &t); 94 } 95 return NULL; 96 } 97 static void leaf(void) {} 98 static void breakme(int line) 99 { 100 if (line > 1000) 101 leaf(); // ensures not leaf, as ppc unwind implies VEX iropt precise exns 102 } 103 int main (int argc, char *argv[]) 104 { 105 char *main_name __attribute__((unused)) = "main name"; 106 pthread_t ebbr, egll, zzzz; 107 int i = 1234; 108 char undef = '?'; 109 char *some_mem __attribute__((unused)) = malloc(100); 110 VALGRIND_MAKE_MEM_UNDEFINED(&undef, 1); 111 int len = strlen(undefined); 112 breakme(__LINE__); //break1 113 for (i = len-1; i >= 0; i=i-2) 114 undefined[i] = undef; 115 *(char*)&int_und = undef; 116 117 breakme(__LINE__); //break2 118 119 if (argc > 1) 120 sleeps = atoi(argv[1]); 121 122 level(); 123 make_error ("called from main"); 124 125 pthread_create(&ebbr, NULL, brussels_fn, NULL); 126 pthread_create(&egll, NULL, london_fn, NULL); 127 pthread_create(&zzzz, NULL, petaouchnok_fn, NULL); 128 129 loopmain = 1; 130 while (! (loopt1 && loopt2 && loopmain)) 131 loopmain++; 132 for (i = 0; i < LOOPS; i++) { 133 loopmain++; 134 135 if (loopmain == 10000) 136 make_error ("in main loop"); 137 } 138 139 pthread_join(ebbr, NULL); 140 141 make_error ("called from main (the end, before joining t3)"); 142 143 pthread_join(zzzz, NULL); 144 145 if (argc > 2) { 146 for (i = 0; i < 100; i++) 147 if ((*(&undef + i*4000) == 0) || (*(&undef - i*4000) == 0)) { 148 printf ("there are some null bytes here and there %d\n", i); 149 fflush(stdout); 150 } 151 } 152 exit(0); 153 } 154
