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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
static void breakme(int line)
{
fprintf(stderr, "breakme function called from line %d\n", line);
fflush(stderr);
}
static char undefined[10] = "undefined";
int main (int argc, char *argv[])
{
/* we will test
read watchpoint at 0,
read/write watchpoints at 4
write watchpoints at 8 */
breakme(__LINE__); //break1
/* We verify read watchpoints are triggered at 0 and 4, not at 8 */
fprintf(stderr, "before reading 0/4/8\n");
if (undefined[0] == 'u')
fprintf(stderr, "u: Expected value at 0\n");
else
fprintf(stderr, "u: Unexpected value at 0\n");
if (undefined[4] == 'f')
fprintf(stderr, "f: Expected value at 4\n");
else
fprintf(stderr, "f: Unexpected value at 4\n");
if (undefined[8] == 'd')
fprintf(stderr, "d: Expected value at 8\n");
else
fprintf(stderr, "d: Unexpected value at 8\n");
/* We verify write watchpoints are triggered at 4 and 8, not at 0 */
fprintf(stderr, "before writing 0\n");
undefined[0] = 'U';
fprintf(stderr, "before writing 4\n");
undefined[4] = 'F';
fprintf(stderr, "before writing 8\n");
undefined[8] = 'D';
fprintf(stderr, "after writing 8\n");
/* after having remove the watchpoints, check we can read and write
without break. */
fprintf(stderr, "value %s\n", undefined);
fprintf(stderr, "before rewriting 0\n");
undefined[0] = '0';
fprintf(stderr, "before rewriting 4\n");
undefined[4] = '4';
fprintf(stderr, "before rewriting 8\n");
undefined[8] = '8';
fprintf(stderr, "value %s\n", undefined);
{
char *k50 = malloc(50000);
memset (k50, 'p', 50000);
fprintf(stderr, "value of k50[1000] %c\n", k50[1000]);
free(k50); //break2
}
exit(0);
}
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