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[fuzzer] Make some use for test_font API calls 

Making some use for result of some of the test_font calls to make
sure compilers in fuzzers aren't just optimizing the calls.
This commit is contained in:
Ebrahim Byagowi 2020-06-20 01:02:50 +04:30
parent b4f34539c2
commit 0881611778
2 changed files with 30 additions and 20 deletions
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28
test/api/test-ot-face.c
View File

@ -32,17 +32,19 @@
/* Unit tests for hb-ot-*.h */
static void
/* Return some dummy result so that compiler won't just optimize things */
static long long
test_font (hb_font_t *font, hb_codepoint_t cp)
{
long long result = 0;
hb_face_t *face = hb_font_get_face (font);
hb_set_t *set;
hb_codepoint_t g;
hb_position_t x, y;
hb_codepoint_t g = 0;
hb_position_t x = 0, y = 0;
char buf[5] = {0};
unsigned int len;
hb_glyph_extents_t extents;
unsigned int len = 0;
hb_glyph_extents_t extents = {0};
hb_ot_font_set_funcs (font);
set = hb_set_create ();
@ -74,7 +76,8 @@ test_font (hb_font_t *font, hb_codepoint_t cp)
hb_ot_color_has_png (face);
hb_blob_destroy (hb_ot_color_glyph_reference_png (font, cp));
hb_aat_layout_feature_type_t feature;
{
hb_aat_layout_feature_type_t feature = HB_AAT_LAYOUT_FEATURE_TYPE_ALL_TYPOGRAPHIC;
unsigned count = 1;
hb_aat_layout_get_feature_types (face, 0, &count, &feature);
hb_aat_layout_feature_type_get_name_id (face, HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE);
@ -82,6 +85,8 @@ test_font (hb_font_t *font, hb_codepoint_t cp)
unsigned default_index;
count = 1;
hb_aat_layout_feature_type_get_selector_infos (face, HB_AAT_LAYOUT_FEATURE_TYPE_DESIGN_COMPLEXITY_TYPE, 0, &count, &setting, &default_index);
result += count + feature + setting.disable + setting.disable + setting.name_id + setting.reserved + default_index;
}
hb_set_t *lookup_indexes = hb_set_create ();
hb_set_add (lookup_indexes, 0);
@ -102,8 +107,8 @@ test_font (hb_font_t *font, hb_codepoint_t cp)
hb_ot_layout_get_ligature_carets (font, HB_DIRECTION_LTR, cp, 0, NULL, NULL);
{
unsigned temp = 0, temp2;
hb_ot_name_id_t name;
unsigned temp = 0, temp2 = 0;
hb_ot_name_id_t name = HB_OT_NAME_ID_FULL_NAME;
hb_ot_layout_get_size_params (face, &temp, &temp, &name, &temp, &temp);
hb_tag_t cv01 = HB_TAG ('c','v','0','1');
unsigned feature_index = 0;
@ -116,6 +121,8 @@ test_font (hb_font_t *font, hb_codepoint_t cp)
hb_ot_layout_feature_get_characters (face, HB_OT_TAG_GSUB, feature_index, 0, &temp, &g);
temp = 1;
hb_ot_layout_language_get_feature_indexes (face, HB_OT_TAG_GSUB, 0, 0, 0, &temp, &temp2);
result += temp + name + feature_index + temp2;
}
hb_ot_math_has_data (face);
@ -162,6 +169,9 @@ test_font (hb_font_t *font, hb_codepoint_t cp)
#endif
hb_set_destroy (set);
return result + g + x + y + buf[0] + buf[1] + buf[2] + buf[3] + buf[4] + len +
extents.height + extents.width + extents.x_bearing + extents.y_bearing;
}
#ifndef TEST_OT_FACE_NO_MAIN

6
test/fuzzing/hb-shape-fuzzer.cc
View File

@ -44,15 +44,15 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
if (len)
memcpy (text32, data + size - len, len);
/* Misc calls on font. */
text32[10] = test_font (font, text32[15]) % 256;
hb_buffer_t *buffer = hb_buffer_create ();
hb_buffer_add_utf32 (buffer, text32, sizeof (text32) / sizeof (text32[0]), 0, -1);
hb_buffer_guess_segment_properties (buffer);
hb_shape (font, buffer, nullptr, 0);
hb_buffer_destroy (buffer);
/* Misc calls on font. */
test_font (font, text32[15]);
hb_font_destroy (font);
hb_face_destroy (face);
hb_blob_destroy (blob);