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[Unstable] separate data from glyphs

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This commit is contained in:
Ceyhun Alp 2020-11-27 12:14:28 +00:00
parent 707dcab5ba
commit f6949881f6
1 changed files with 10 additions and 4 deletions
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14
fuzzing/text_glyphs_fuzzer.c
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@ -12,18 +12,23 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
cairo_status_t status;
cairo_text_extents_t extents;
cairo_text_cluster_t cluster;
size_t new_size = size - glyph_range;
uint8_t *new_data = (uint8_t *) calloc(new_size, sizeof(uint8_t));
/*memcpy(new_data, &data[glyph_range], new_size*sizeof(uint8_t));*/
memcpy(new_data, data, new_size * sizeof(uint8_t));
char *tmpfile = fuzzer_get_tmpfile(data, size);
char *tmpfile = fuzzer_get_tmpfile(new_data, new_size);
surface = cairo_image_surface_create_from_png(tmpfile);
status = cairo_surface_status(surface);
if (status != CAIRO_STATUS_SUCCESS) {
free(new_data);
fuzzer_release_tmpfile(tmpfile);
return 0;
}
char *buf = (char *) calloc(size + 1, sizeof(char));
memcpy(buf, data, size);
buf[size] = '\0';
char *buf = (char *) calloc(new_size + 1, sizeof(char));
memcpy(buf, new_data, new_size);
buf[new_size] = '\0';
cr = cairo_create(surface);
cairo_text_extents(cr, buf, &extents);
@ -39,6 +44,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
cairo_destroy(cr);
cairo_surface_destroy(surface);
free(new_data);
free(buf);
fuzzer_release_tmpfile(tmpfile);
return 0;