Checking structure sizes before reading them from memory to avoid overflowing the buffer's stream.

tests/PathTest.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "Test.h"
 #include "SkCanvas.h"
 #include "SkPaint.h"
@@ skipping 1745 matching lines @@
     write_and_read_back(reporter, p);
 
     // create a buffer that should be much larger than the path so we don't
     // kill our stack if writer goes too far.
     char buffer[1024];
     uint32_t size1 = p.writeToMemory(NULL);
     uint32_t size2 = p.writeToMemory(buffer);
     REPORTER_ASSERT(reporter, size1 == size2);
 
     SkPath p2;
-    uint32_t size3 = p2.readFromMemory(buffer);
+    uint32_t size3 = p2.readFromMemory(buffer, 1024);
     REPORTER_ASSERT(reporter, size1 == size3);
     REPORTER_ASSERT(reporter, p == p2);
 
     char buffer2[1024];
     size3 = p2.writeToMemory(buffer2);
     REPORTER_ASSERT(reporter, size1 == size3);
     REPORTER_ASSERT(reporter, memcmp(buffer, buffer2, size1) == 0);
 
     // test persistence of the oval flag & convexity
     {
@@ skipping 842 matching lines @@
     test_crbug_170666();
     test_bad_cubic_crbug229478();
     test_bad_cubic_crbug234190();
     test_android_specific_behavior(reporter);
     test_path_close_issue1474(reporter);
     test_path_to_region(reporter);
 }
 
 #include "TestClassDef.h"
 DEFINE_TESTCLASS("Path", PathTestClass, TestPath)