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[fuzz] Practice variations on font object

This commit is contained in:
Ebrahim Byagowi 2020-02-25 20:07:25 +03:30
parent 036d868913
commit 152000d9c7
2 changed files with 17 additions and 7 deletions
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8
test/api/test-ot-face.c
View File

@ -33,10 +33,9 @@
static void
test_face (hb_face_t *face,
hb_codepoint_t cp)
test_font (hb_font_t *font, hb_codepoint_t cp)
{
hb_font_t *font = hb_font_create (face);
hb_face_t *face = hb_font_get_face (font);
hb_set_t *set;
hb_codepoint_t g;
hb_position_t x, y;
@ -126,14 +125,13 @@ test_face (hb_face_t *face,
hb_draw_funcs_destroy (funcs);
hb_set_destroy (set);
hb_font_destroy (font);
}
#ifndef TEST_OT_FACE_NO_MAIN
static void
test_ot_face_empty (void)
{
test_face (hb_face_get_empty (), 0);
test_font (hb_font_get_empty (), 0);
}
static void

16
test/fuzzing/hb-shape-fuzzer.cc
View File

@ -3,6 +3,8 @@
#include <hb-ot.h>
#include <string.h>
#include <stdlib.h>
#define TEST_OT_FACE_NO_MAIN 1
#include "../api/test-ot-face.c"
#undef TEST_OT_FACE_NO_MAIN
@ -16,6 +18,16 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
hb_ot_font_set_funcs (font);
hb_font_set_scale (font, 12, 12);
unsigned num_coords = 0;
if (size) num_coords = data[size - 1];
num_coords = hb_ot_var_get_axis_count (face) > num_coords ? num_coords : hb_ot_var_get_axis_count (face);
int *coords = (int *) calloc (num_coords, sizeof (int));
if (size > num_coords + 1)
for (unsigned i = 0; i < num_coords; ++i)
coords[i] = ((int) data[size - num_coords + i - 1] - 128) * 10;
hb_font_set_var_coords_normalized (font, coords, num_coords);
free (coords);
{
const char text[] = "ABCDEXYZ123@_%&)*$!";
hb_buffer_t *buffer = hb_buffer_create ();
@ -37,8 +49,8 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
hb_shape (font, buffer, nullptr, 0);
hb_buffer_destroy (buffer);
/* Misc calls on face. */
test_face (face, text32[15]);
/* Misc calls on font. */
test_font (font, text32[15]);
hb_font_destroy (font);
hb_face_destroy (face);