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/* Test of external malloc, calloc, realloc and free capability */
#if 1
#include "test.h"
#include "usctest.h"
#else
enum {TPASS, TFAIL, TBROK, TINFO};
#define tst_resm(xxx, yyy...) printf(yyy), printf(" RES %d\n", xxx)
#define tst_brkm(xxx, yyy, zzz...) printf(zzz), printf(" RES %d\n", xxx)
#define tst_exit()
int Tst_count;
#endif
#include <stdlib.h>
#include <stdio.h>
#include <strings.h>
#include <errno.h>
#include <unistd.h>
#include <sys/wait.h>
const char *TCID = "malloc"; /* Test program identifier. */
int TST_TOTAL = 2; /* Total number of test cases. */
extern int Tst_count; /* Test Case counter for tst_* routines */
/* Main test.
Verbose mode if argc > 0
Note that malloc and friends are also called by Cygwin before main,
and that malloc can call getenv. */
int malloc_error = 0, realloc_error = 0, free_error = 0;
int calloc_count = 0, malloc_count = 0, realloc_count = 0, free_count = 0;
void
cleanup (void)
{
tst_exit();
}
int
syncwithchild (pid_t pid, int expected_exit_status)
{
int status;
if (waitpid (pid, &status, 0) != pid)
{
tst_brkm (TBROK, cleanup, "Wait for child: %s", strerror (errno));
return 1;
}
if (!WIFEXITED (status))
{
tst_brkm (TBROK, cleanup, "Child had abnormal exit");
return 1;
}
if (WEXITSTATUS (status) != expected_exit_status)
{
tst_brkm (TFAIL, cleanup, "Child had exit status %d != %d",
WEXITSTATUS (status), expected_exit_status);
return 1;
}
return 0;
}
#if 0
void * mallocX (size_t size);
void * callocX (size_t nmemb, size_t size);
void * reallocX (void * ptr, size_t size);
void freeX(void *);
#define malloc mallocX
#define calloc callocX
#define realloc reallocX
#define free freeX
#endif
int main (int argc, char * argv[])
{
void * ptr;
int error = 0;
pid_t pid;
Tst_count = 0;
tst_resm(TINFO, "Testing if external malloc works. ppid %d", getppid());
ptr = malloc (16);
ptr = calloc (1, 16);
ptr = realloc (ptr, 24);
free (ptr);
error = (malloc_count == 0 || calloc_count == 0 || realloc_count == 0 || free_count == 0);
if (error || argc > 1)
{
printf ("malloc_count %d, calloc_count %d, realloc_count %d, free_count %d\n",
malloc_count, calloc_count, realloc_count, free_count);
printf ("malloc_error %d, realloc_error %d, free_error %d\n",
malloc_error, realloc_error, free_error);
}
tst_resm (!error ? TPASS : TFAIL, "Running in pid %d", getpid());
/* If run from Windows, run also from Cygwin */
if (getppid() == 1)
{
tst_resm(TINFO, "Ready to test if malloc works from Cygwin");
if ((pid = fork()) == 0)
{
tst_resm(TINFO, "Ready to exec with pid %d\n", getpid());
error = execl(argv[0], argv[0], argc > 1? argv[1]:NULL, NULL);
exit(error);
}
else if (pid < 0)
tst_brkm (TBROK, cleanup, "Fork failed: %s", strerror (errno));
else
{
error = syncwithchild (pid, 0);
tst_resm (!error ? TPASS : TFAIL, "Running in pid %d", pid);
}
}
tst_exit ();
}
/****************************************
Actual malloc & friends implementation
****************************************/
typedef unsigned long long ull;
#define SIZE (1024*1024ULL) /* long long */
ull buffer[SIZE];
ull * current = buffer;
static int is_valid (void * ptr)
{
unsigned int iptr = (unsigned int) ptr;
ull * ullptr = (ull *) ptr;
iptr = (iptr / sizeof(ull)) * sizeof(ull);
if (iptr != (int) ptr)
return 0;
if (--ullptr < buffer || ullptr[0] > SIZE || ullptr + ullptr[0] > current)
return 0;
return 1;
}
void * malloc (size_t size)
{
ull llsize = (size + 2 * sizeof (ull) - 1) / sizeof (ull);
static char * envptr;
void * ret;
/* Make sure getenv works */
if (!envptr)
envptr = getenv ("PATH");
malloc_count++;
if (current + llsize >= buffer + SIZE)
{
malloc_error++;
errno = ENOMEM;
return NULL;
}
*current = llsize;
ret = (void *) (current + 1);
current += llsize;
return ret;
}
void * calloc (size_t nmemb, size_t size)
{
calloc_count++;
void * ptr = malloc (nmemb * size);
malloc_count--;
if (ptr)
memset(ptr, 0, nmemb * size);
return ptr;
}
void * realloc (void * ptr, size_t size)
{
const ull ullsize = (size + 2 * sizeof (ull) - 1) / sizeof (ull);
ull * const ullptr = (ull *) ptr;
void * newptr;
realloc_count++;
if (ptr)
{
if (!is_valid (ptr))
{
realloc_error++;
errno = ENOMEM;
return NULL;
}
if (ullptr[-1] >= ullsize)
return ptr;
}
newptr = malloc (size);
malloc_count--;
if (ptr && newptr)
memcpy (newptr, ptr, size);
return newptr;
}
void free (void * x)
{
free_count++;
if (x && ! is_valid (x))
free_error++;
}
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