[subset] Update the subset fuzzer to determine which options to use based on data in the fuzzing test case.
Add support for toggling retain_gids.
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@ -11,11 +11,13 @@ trySubset (hb_face_t *face,
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const hb_codepoint_t text[],
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const hb_codepoint_t text[],
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int text_length,
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int text_length,
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bool drop_hints,
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bool drop_hints,
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bool drop_layout)
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bool drop_layout,
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bool retain_gids)
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{
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{
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hb_subset_input_t *input = hb_subset_input_create_or_fail ();
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hb_subset_input_t *input = hb_subset_input_create_or_fail ();
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hb_subset_input_set_drop_hints (input, drop_hints);
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hb_subset_input_set_drop_hints (input, drop_hints);
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hb_subset_input_set_drop_layout (input, drop_layout);
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hb_subset_input_set_drop_layout (input, drop_layout);
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hb_subset_input_set_retain_gids (input, retain_gids);
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hb_set_t *codepoints = hb_subset_input_unicode_set (input);
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hb_set_t *codepoints = hb_subset_input_unicode_set (input);
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for (int i = 0; i < text_length; i++)
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for (int i = 0; i < text_length; i++)
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@ -32,16 +34,14 @@ trySubset (hb_face_t *face,
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static void
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static void
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trySubset (hb_face_t *face,
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trySubset (hb_face_t *face,
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const hb_codepoint_t text[],
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const hb_codepoint_t text[],
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int text_length)
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int text_length,
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const uint8_t flags[1])
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{
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{
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for (unsigned int drop_hints = 0; drop_hints < 2; drop_hints++)
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bool drop_hints = flags[0] & (1 << 0);
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{
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bool drop_layout = flags[0] & (1 << 1);
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for (unsigned int drop_layout = 0; drop_layout < 2; drop_layout++)
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bool retain_gids = flags[0] & (1 << 2);
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{
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trySubset (face, text, text_length,
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trySubset (face, text, text_length,
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drop_hints, drop_layout, retain_gids);
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(bool) drop_hints, (bool) drop_layout);
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}
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}
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}
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}
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
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@ -55,21 +55,27 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
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hb_face_collect_unicodes (face, output);
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hb_face_collect_unicodes (face, output);
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hb_set_destroy (output);
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hb_set_destroy (output);
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uint8_t flags[1] = {0};
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const hb_codepoint_t text[] =
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const hb_codepoint_t text[] =
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{
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{
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'A', 'B', 'C', 'D', 'E', 'X', 'Y', 'Z', '1', '2',
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'A', 'B', 'C', 'D', 'E', 'X', 'Y', 'Z', '1', '2',
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'3', '@', '_', '%', '&', ')', '*', '$', '!'
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'3', '@', '_', '%', '&', ')', '*', '$', '!'
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};
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};
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trySubset (face, text, sizeof (text) / sizeof (hb_codepoint_t));
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trySubset (face, text, sizeof (text) / sizeof (hb_codepoint_t), flags);
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hb_codepoint_t text_from_data[16];
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hb_codepoint_t text_from_data[16];
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if (size > sizeof(text_from_data)) {
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if (size > sizeof(text_from_data) + sizeof(flags)) {
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memcpy (text_from_data,
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memcpy (text_from_data,
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data + size - sizeof(text_from_data),
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data + size - sizeof(text_from_data),
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sizeof(text_from_data));
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sizeof(text_from_data));
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memcpy (flags,
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data + size - sizeof(text_from_data) - sizeof(flags),
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sizeof(flags));
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unsigned int text_size = sizeof (text_from_data) / sizeof (hb_codepoint_t);
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unsigned int text_size = sizeof (text_from_data) / sizeof (hb_codepoint_t);
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trySubset (face, text_from_data, text_size);
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trySubset (face, text_from_data, text_size, flags);
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}
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}
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hb_face_destroy (face);
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hb_face_destroy (face);
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