[subset] add a fuzzer target for subset_get_all_codepoints method. (#987)

test/fuzzing/CMakeLists.txt

@@ -2,6 +2,7 @@ if (HB_CHECK)
   file (READ "${CMAKE_CURRENT_SOURCE_DIR}/Makefile.am" MAKEFILEAM)
   extract_make_variable (hb_shape_fuzzer_SOURCES ${MAKEFILEAM})
   extract_make_variable (hb_subset_fuzzer_SOURCES ${MAKEFILEAM})
+  extract_make_variable (hb_subset_get_codepoints_fuzzer_SOURCES ${MAKEFILEAM})
 
   # TODO: enable these two
   #extract_make_variable (FUZZING_CPPFLAGS ${MAKEFILEAM}) # extracting regex fail
@@ -15,13 +16,17 @@ if (HB_CHECK)
   add_executable (hb-subset-fuzzer ${hb_subset_fuzzer_SOURCES})
   target_link_libraries (hb-subset-fuzzer harfbuzz-subset)
 
+  add_executable (hb-subset-get-codepoints-fuzzer ${hb_subset_get_codepoints_fuzzer_SOURCES})
+  target_link_libraries (hb-subset-get-codepoints-fuzzer harfbuzz-subset)
+
   target_compile_definitions(hb-shape-fuzzer PUBLIC ${FUZZING_CPPFLAGS})
   target_compile_definitions(hb-subset-fuzzer PUBLIC ${FUZZING_CPPFLAGS})
+  target_compile_definitions(hb-subset-get-codepoints-fuzzer PUBLIC ${FUZZING_CPPFLAGS})
 
   add_test (NAME hb-shape-fuzzer
     COMMAND "${PYTHON_EXECUTABLE}" run-shape-fuzzer-tests.py $<TARGET_FILE:hb-shape-fuzzer>
     WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
   add_test (NAME hb-subset-fuzzer
-    COMMAND "${PYTHON_EXECUTABLE}" run-subset-fuzzer-tests.py $<TARGET_FILE:hb-subset-fuzzer>
+    COMMAND "${PYTHON_EXECUTABLE}" run-subset-fuzzer-tests.py $<TARGET_FILE:hb-subset-fuzzer> $<TARGET_FILE:hb-subset-get-codepoints-fuzzer>
     WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
 endif ()

test/fuzzing/Makefile.am

@@ -23,6 +23,7 @@ EXTRA_DIST += \
 check_PROGRAMS = \
 	hb-shape-fuzzer \
 	hb-subset-fuzzer \
+	hb-subset-get-codepoints-fuzzer \
 	$(NULL)
 
 AM_CPPFLAGS = \
@@ -64,6 +65,21 @@ hb_subset_fuzzer_DEPENDENCIES = \
 	lib \
 	$(NULL)
 
+hb_subset_get_codepoints_fuzzer_SOURCES = \
+	hb-fuzzer.hh \
+	hb-subset-get-codepoints-fuzzer.cc \
+	main.cc \
+	$(NULL)
+hb_subset_get_codepoints_fuzzer_LDADD = \
+	$(top_builddir)/src/libharfbuzz-subset-fuzzing.la \
+	$(NULL)
+hb_subset_get_codepoints_fuzzer_CPPFLAGS = \
+	$(AM_CPPFLAGS) \
+	$(NULL)
+hb_subset_get_codepoints_fuzzer_DEPENDENCIES = \
+	lib \
+	$(NULL)
+
 check:
 	EXEEXT="$(EXEEXT)" srcdir="$(srcdir)" builddir="$(builddir)" $(srcdir)/run-shape-fuzzer-tests.py
 	EXEEXT="$(EXEEXT)" srcdir="$(srcdir)" builddir="$(builddir)" $(srcdir)/run-subset-fuzzer-tests.py

test/fuzzing/hb-subset-get-codepoints-fuzzer.cc

+#include "hb-fuzzer.hh"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "hb-subset.h"
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
+{
+  printf ("hb-subset-get-codepoints-fuzzer: input size = %zu\n", size);
+  hb_blob_t *blob = hb_blob_create ((const char *)data, size,
+                                    HB_MEMORY_MODE_READONLY, NULL, NULL);
+  hb_face_t *face = hb_face_create (blob, 0);
+
+  hb_set_t *output = hb_set_create();
+  hb_subset_get_all_codepoints (face, output);
+
+  hb_set_destroy (output);
+  hb_face_destroy (face);
+  hb_blob_destroy (blob);
+
+  return 0;
+}

test/fuzzing/run-subset-fuzzer-tests.py

@@ -8,15 +8,24 @@ srcdir = os.environ.get ("srcdir", ".")
 EXEEXT = os.environ.get ("EXEEXT", "")
 top_builddir = os.environ.get ("top_builddir", ".")
 hb_subset_fuzzer = os.path.join (top_builddir, "hb-subset-fuzzer" + EXEEXT)
+hb_subset_get_codepoints_fuzzer = os.path.join (top_builddir, "hb-subset-get-codepoints-fuzzer" + EXEEXT)
 
 if not os.path.exists (hb_subset_fuzzer):
-        if len (sys.argv) == 1 or not os.path.exists (sys.argv[1]):
+        if len (sys.argv) < 2 or not os.path.exists (sys.argv[1]):
                 print ("""Failed to find hb-subset-fuzzer binary automatically,
 please provide it as the first argument to the tool""")
                 sys.exit (1)
 
         hb_subset_fuzzer = sys.argv[1]
 
+if not os.path.exists (hb_subset_get_codepoints_fuzzer):
+        if len (sys.argv) < 3 or not os.path.exists (sys.argv[2]):
+                print ("""Failed to find hb-subset-get-codepoints-fuzzer binary automatically,
+please provide it as the second argument to the tool""")
+                sys.exit (1)
+
+        hb_subset_get_codepoints_fuzzer = sys.argv[2]
+
 print ('hb_subset_fuzzer:', hb_subset_fuzzer)
 fails = 0
 
@@ -24,6 +33,7 @@ parent_path = os.path.join (srcdir, "..", "subset", "data", "fonts")
 print ("running subset fuzzer against fonts in %s" % parent_path)
 for file in os.listdir (parent_path):
         path = os.path.join(parent_path, file)
+
         print ("running subset fuzzer against %s" % path)
         p = subprocess.Popen ([hb_subset_fuzzer, path])
 
@@ -31,6 +41,13 @@ for file in os.listdir (parent_path):
                 print ("failed for %s" % path)
                 fails = fails + 1
 
+        print ("running subset get codepoints fuzzer against %s" % path)
+        p = subprocess.Popen ([hb_subset_get_codepoints_fuzzer, path])
+
+        if p.wait () != 0:
+                print ("failed for %s" % path)
+                fails = fails + 1
+
 if fails:
         print ("%i subset fuzzer related tests failed." % fails)
         sys.exit (1)