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gtk/gdk-pixbuf/test-loaders.c

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/* -*- Mode: C; c-basic-offset: 2; -*- */
/* GdkPixbuf library - test loaders
*
* Copyright (C) 2001 Søren Sandmann (sandmann@daimi.au.dk)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*/
#include <config.h>
#include "gdk-pixbuf.h"
#include <stdio.h>
#include <stdlib.h>
#include "test-images.h"
#include <time.h>
#include <string.h>
#define PRETEND_MEM_SIZE (16 * 1024 * 1024)
#define REMAINING_MEM_SIZE 5000
static int current_allocation = 0;
static int max_allocation = 0;
#define HEADER_SPACE sizeof(void*)
static gpointer
record_bytes (gpointer mem, gsize bytes)
{
if (mem == NULL ||
(current_allocation + bytes) > max_allocation)
{
if (mem)
free (mem);
return NULL;
}
*(void **)mem = GINT_TO_POINTER (bytes);
g_assert (GPOINTER_TO_INT (*(void**)mem) == bytes);
g_assert (current_allocation >= 0);
current_allocation += bytes;
g_assert (current_allocation >= 0);
g_assert ( mem == (void*) ((((char*)mem) + HEADER_SPACE) - HEADER_SPACE) );
return ((char*)mem) + HEADER_SPACE;
}
static gpointer
limited_try_malloc (gsize n_bytes)
{
return record_bytes (malloc (n_bytes + HEADER_SPACE), n_bytes);
}
static gpointer
limited_malloc (gsize n_bytes)
{
return limited_try_malloc (n_bytes);
}
static gpointer
limited_calloc (gsize n_blocks,
gsize n_block_bytes)
{
int bytes = n_blocks * n_block_bytes + HEADER_SPACE;
gpointer mem = malloc (bytes);
memset (mem, 0, bytes);
return record_bytes (mem, n_blocks * n_block_bytes);
}
static void
limited_free (gpointer mem)
{
gpointer real = ((char*)mem) - HEADER_SPACE;
g_assert (current_allocation >= 0);
current_allocation -= GPOINTER_TO_INT (*(void**)real);
g_assert (current_allocation >= 0);
free (real);
}
static gpointer
limited_try_realloc (gpointer mem,
gsize n_bytes)
{
if (mem == NULL)
{
return limited_try_malloc (n_bytes);
}
else
{
gpointer real;
g_assert (mem);
real = ((char*)mem) - HEADER_SPACE;
g_assert (current_allocation >= 0);
current_allocation -= GPOINTER_TO_INT (*(void**)real);
g_assert (current_allocation >= 0);
return record_bytes (realloc (real, n_bytes + HEADER_SPACE), n_bytes);
}
}
static gpointer
limited_realloc (gpointer mem,
gsize n_bytes)
{
return limited_try_realloc (mem, n_bytes);
}
static GMemVTable limited_table = {
limited_malloc,
limited_realloc,
limited_free,
limited_calloc,
limited_try_malloc,
limited_try_realloc
};
static gboolean
test_loader (const guchar *bytes, gsize len, gboolean data_is_ok)
{
GdkPixbufLoader *loader;
GError *err = NULL;
gboolean did_fail = FALSE;
loader = gdk_pixbuf_loader_new ();
gdk_pixbuf_loader_write (loader, bytes, len, &err);
if (err)
{
g_error_free (err);
err = NULL;
did_fail = TRUE;
}
gdk_pixbuf_loader_close (loader, &err);
if (err)
{
g_error_free (err);
err = NULL;
did_fail = TRUE;
}
g_object_unref (G_OBJECT (loader));
if (data_is_ok == did_fail)
return FALSE;
else
return TRUE;
}
static void
mem_test (const guchar *bytes, gsize len)
{
gboolean did_fail = FALSE;
GError *err = NULL;
GdkPixbufLoader *loader;
GList *loaders = NULL;
GList *i;
do {
loader = gdk_pixbuf_loader_new ();
gdk_pixbuf_loader_write (loader, bytes, len, &err);
if (err)
{
g_error_free (err);
err = NULL;
did_fail = TRUE;
}
gdk_pixbuf_loader_close (loader, NULL);
if (err)
{
g_error_free (err);
err = NULL;
did_fail = TRUE;
}
loaders = g_list_prepend (loaders, loader);
} while (!did_fail);
for (i = loaders; i != NULL; i = i->next)
g_object_unref (G_OBJECT (i->data));
g_list_free (loaders);
}
void
assault (const gchar *header, gsize header_size,
int n_images, gboolean verbose)
{
enum { N_CHARACTERS = 10000 };
int j;
for (j = 0; j < n_images; ++j)
{
GError *err = NULL;
int i;
GdkPixbufLoader *loader;
if (verbose)
g_print ("'img' no: %d\n", j);
loader = gdk_pixbuf_loader_new ();
gdk_pixbuf_loader_write (loader, header, header_size, &err);
if (err)
{
g_error_free (err);
continue;
}
for (i = 0; i < N_CHARACTERS; ++i)
{
int r = g_random_int ();
if (verbose)
{
int j;
for (j = 0; j < sizeof (r); j++)
g_print ("%u, ", ((guchar *)&r)[j]);
}
gdk_pixbuf_loader_write (loader, (guchar *)&r, sizeof (r), &err);
if (err)
{
g_error_free (err);
err = NULL;
break;
}
}
if (verbose)
g_print ("\n");
gdk_pixbuf_loader_close (loader, &err);
if (err)
{
g_error_free (err);
err = NULL;
}
g_object_unref (G_OBJECT (loader));
}
}
static void
randomly_modify (const guchar *image, guint size, gboolean verbose)
{
int i;
guchar *img_copy = g_malloc (size);
for (i = 0; i < size; i++)
img_copy [i] = image[i];
for (i = 0; i < size / 4; i++)
{
int j;
guint index = g_random_int_range (0, size);
guchar byte = g_random_int_range (0, 256);
img_copy[index] = byte;
if (verbose)
{
g_print ("img no %d\n", i);
for (j = 0; j < size; j++)
g_print ("%u, ", img_copy[j]);
g_print ("\n\n");
}
test_loader (img_copy, size, FALSE);
}
g_free (img_copy);
}
#define TEST(bytes, data_is_ok) \
do { \
g_print ("%-40s", " " #bytes " "); \
fflush (stdout); \
if (test_loader (bytes, sizeof (bytes), data_is_ok)) \
g_print ("\tpassed\n"); \
else \
g_print ("\tFAILED\n"); \
} while (0)
#define LOWMEMTEST(bytes) \
do { \
g_print ("%-40s", "memory " #bytes " "); \
fflush (stdout); \
mem_test (bytes, sizeof (bytes)); \
g_print ("\tpassed\n"); \
} while (0)
#define TEST_RANDOM(header, n_img, verbose) \
do { \
static guchar h[] = { header }; \
g_print ("%-40s", "random " #header " "); \
fflush (stdout); \
assault (h, sizeof (h), n_img, verbose); \
g_print ("\tpassed\n"); \
} while (0)
#define TEST_RANDOMLY_MODIFIED(image, verbose) \
do { \
g_print ("%-40s", "randomly modified " #image " "); \
fflush (stdout); \
randomly_modify (image, sizeof (image), verbose); \
g_print ("\tpassed\n"); \
} while (0)
static void
almost_exhaust_memory (void)
{
gpointer x = g_malloc (REMAINING_MEM_SIZE);
while (g_try_malloc (REMAINING_MEM_SIZE / 10))
;
g_free (x);
}
static void
write_seed (int seed)
{
FILE *f;
/* write this so you can reproduce failed tests */
f = fopen ("test-loaders-seed", "w");
if (!f)
{
perror ("fopen");
exit (EXIT_FAILURE);
}
if (fprintf (f, "%d\n", seed) < 0)
{
perror ("fprintf");
exit (EXIT_FAILURE);
}
if (fclose (f) < 0)
{
perror ("fclose");
exit (EXIT_FAILURE);
}
g_print ("seed: %d\n", seed);
}
int
main (int argc, char **argv)
{
int seed;
/* Set a malloc which emulates low mem */
max_allocation = G_MAXINT;
g_mem_set_vtable (&limited_table);
if (argc > 1)
seed = atoi (argv[1]);
else
{
seed = time (NULL);
write_seed (seed);
}
g_random_set_seed (seed);
g_type_init ();
g_log_set_always_fatal (G_LOG_LEVEL_WARNING | G_LOG_LEVEL_ERROR | G_LOG_LEVEL_CRITICAL);
putenv ("GDK_PIXBUF_MODULEDIR="BUILT_MODULES_DIR);
TEST (valid_ppm_1, TRUE);
TEST (valid_ppm_2, TRUE);
TEST (valid_ppm_3, FALSE); /* image is valid, but we don't handle maxval > 255 */
TEST (valid_ppm_4, TRUE);
TEST (invalid_ppm_1, FALSE); /* this test fails to fail, because it's shorter than LOADER_HEADER_SIZE */
TEST (invalid_ppm_2, FALSE);
TEST (invalid_ppm_3, FALSE);
TEST (invalid_ppm_4, FALSE);
TEST (invalid_ppm_5, FALSE);
TEST (invalid_ppm_6, FALSE);
TEST (invalid_ppm_7, FALSE);
TEST (invalid_ppm_8, FALSE);
TEST (valid_gif_test, TRUE);
TEST (gif_test_1, FALSE);
TEST (gif_test_2, FALSE);
TEST (gif_test_3, FALSE);
TEST (gif_test_4, FALSE);
TEST (valid_png_test, TRUE);
TEST (png_test_1, FALSE);
TEST (png_test_2, FALSE);
#if 0
TEST (valid_ico_test, TRUE);
#endif
TEST (ico_test_1, FALSE);
TEST (valid_jpeg_test, TRUE);
TEST (valid_tiff1_test, TRUE);
TEST (tiff1_test_1, FALSE);
TEST (tiff1_test_2, FALSE);
TEST (valid_tga_test, TRUE);
TEST (tga_test_1, FALSE);
TEST (xpm_test_1, FALSE);
TEST_RANDOM (GIF_HEADER, 150, FALSE);
TEST_RANDOM (PNG_HEADER, 1100, FALSE);
TEST_RANDOM (JPEG_HEADER, 800, FALSE);
TEST_RANDOM (TIFF1_HEADER, 150, FALSE);
TEST_RANDOM (TIFF2_HEADER, 150, FALSE);
#define PNM_HEADER 'P', '6'
TEST_RANDOM (PNM_HEADER, 150, FALSE);
TEST_RANDOMLY_MODIFIED (valid_tiff1_test, FALSE);
TEST_RANDOMLY_MODIFIED (valid_gif_test, FALSE);
TEST_RANDOMLY_MODIFIED (valid_png_test, FALSE);
TEST_RANDOMLY_MODIFIED (valid_tga_test, FALSE);
TEST_RANDOMLY_MODIFIED (valid_jpeg_test, FALSE); /* The jpeg loader does not break */
#if 0
TEST_RANDOMLY_MODIFIED (valid_ico_test, TRUE); /* The ico loader does not seem to
* break, but the image tend to
* mutate into a wbmp image, and
* the wbmp loader is broken
*/
#endif
#if 0
TEST (wbmp_test_1, FALSE);
TEST (wbmp_test_2, FALSE);
#endif
/* memory tests */
/* How do the loaders behave when memory is low?
It depends on the state the above tests left the
memory in.
- Sometimes the png loader tries to report an
"out of memory", but then g_strdup_printf() calls
g_malloc(), which fails.
- There are unchecked realloc()s inside libtiff, which means it
will never work with low memory, unless something drastic is
done, like allocating a lot of memory upfront and release it
before entering libtiff. Also, some TIFFReadRGBAImage calls
returns successfully, even though they have called the error
handler with an 'out of memory' message.
*/
max_allocation = PRETEND_MEM_SIZE;
almost_exhaust_memory ();
g_print ("Allocated %dK of %dK, %dK free during tests\n",
current_allocation / 1024, max_allocation / 1024,
(max_allocation - current_allocation) / 1024);
#if 0
LOWMEMTEST (valid_tiff1_test);
#endif
LOWMEMTEST (valid_gif_test);
LOWMEMTEST (valid_png_test);
LOWMEMTEST (valid_jpeg_test);
return 0;
}
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