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Add hb-set-fuzzer.

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It fuzzes all of the hb_set process methods (intersection, subtraction, union, and symmetric difference).
This commit is contained in:
Garret Rieger 2020-02-06 13:02:58 -08:00 committed by Ebrahim Byagowi
parent 352ac63ef9
commit bca9bc6b92
2 changed files with 88 additions and 0 deletions
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11
test/fuzzing/Makefile.am
View File

@ -26,6 +26,7 @@ EXTRA_DIST += \
check_PROGRAMS = \
hb-shape-fuzzer \
hb-subset-fuzzer \
hb-set-fuzzer \
$(NULL)
AM_CPPFLAGS = \
@ -54,6 +55,16 @@ hb_subset_fuzzer_LDADD = \
hb_subset_fuzzer_CPPFLAGS = $(AM_CPPFLAGS)
hb_subset_fuzzer_DEPENDENCIES = $(top_builddir)/src/libharfbuzz-subset.la
hb_set_fuzzer_SOURCES = \
hb-fuzzer.hh \
hb-set-fuzzer.cc \
main.cc \
$(NULL)
hb_set_fuzzer_LDADD = $(top_builddir)/src/libharfbuzz.la
hb_set_fuzzer_CPPFLAGS = $(AM_CPPFLAGS)
hb_set_fuzzer_DEPENDENCIES = $(top_builddir)/src/libharfbuzz.la
check:
EXEEXT="$(EXEEXT)" srcdir="$(srcdir)" builddir="$(builddir)" LIBTOOL="$(LIBTOOL)" $(srcdir)/run-shape-fuzzer-tests.py
EXEEXT="$(EXEEXT)" srcdir="$(srcdir)" builddir="$(builddir)" LIBTOOL="$(LIBTOOL)" $(srcdir)/run-subset-fuzzer-tests.py

77
test/fuzzing/hb-set-fuzzer.cc Normal file
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@ -0,0 +1,77 @@
#include "hb-fuzzer.hh"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include "hb.h"
enum set_operation_t : uint8_t
{
INTERSECT,
UNION,
SUBTRACT,
SYMMETRIC_DIFFERENCE
};
struct instructions_t
{
set_operation_t operation;
uint32_t first_set_size;
};
static hb_set_t* create_set (const uint32_t* value_array, int count)
{
hb_set_t* set = hb_set_create ();
for (int i = 0; i < count; i++) {
hb_set_add (set, value_array[i]);
}
return set;
}
extern "C" int LLVMFuzzerTestOneInput (const uint8_t *data, size_t size)
{
if (size < sizeof(instructions_t*))
return 0;
const instructions_t* instructions = reinterpret_cast<const instructions_t*> (data);
data += sizeof(instructions_t);
size -= sizeof(instructions_t);
const uint32_t* values = reinterpret_cast<const uint32_t*> (data);
size = size / sizeof(uint32_t);
if (size < instructions->first_set_size)
return 0;
hb_set_t* set_a = create_set (values, instructions->first_set_size);
values += instructions->first_set_size;
size -= instructions->first_set_size;
hb_set_t* set_b = create_set (values, size);
switch (instructions->operation)
{
case INTERSECT:
hb_set_intersect (set_a, set_b);
break;
case UNION:
hb_set_union (set_a, set_b);
break;
case SUBTRACT:
hb_set_subtract (set_a, set_b);
break;
case SYMMETRIC_DIFFERENCE:
hb_set_symmetric_difference (set_a, set_b);
break;
default:
break;
}
hb_set_destroy (set_a);
hb_set_destroy (set_b);
return 0;
}