Make SyzyAsan support the allocation > 1GB

syzygy/agent/asan/block_unittest.cc

 // Copyright 2014 Google Inc. All Rights Reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
@@ skipping 174 matching lines @@
   EXPECT_EQ(BuildBlockLayout(8, 120, 24, 0, 64, 4, 28), layout);
 
   EXPECT_TRUE(BlockPlanLayout(8, 8, 61, 0, 0, &layout));
   EXPECT_EQ(BuildBlockLayout(8, 120, 24, 0, 61, 7, 28), layout);
 
   // Plan a layout that would use guard pages.
   EXPECT_TRUE(BlockPlanLayout(4096, 8, 100, 4096, 4096, &layout));
   EXPECT_EQ(BuildBlockLayout(4096, 3 * 4096, 24, 8064, 100, 4072, 28), layout);
 #endif
 
-  // Plan a layout with an invalid size, this should fail.
+  // Plan some layouts with an invalid size, this should fail.
+  EXPECT_FALSE(BlockPlanLayout(8, 8, kBlockMaxAllocSize + 1, 0, 0, &layout));
   EXPECT_FALSE(BlockPlanLayout(8, 8, 0xffffffff, 0, 0, &layout));
 }
 
 TEST_F(BlockTest, EndToEnd) {
   BlockLayout layout = {};
   BlockInfo block_info = {};
 
   EXPECT_TRUE(BlockPlanLayout(8, 8, 4, 0, 0, &layout));
   std::vector<uint8_t> block_data(layout.block_size);
   BlockInitialize(layout, block_data.data(), &block_info);
@@ skipping 597 matching lines @@
       BlockBitFlipsFixChecksum(QUARANTINED_BLOCK, block1.block_info, 0));
   EXPECT_TRUE(
       BlockBitFlipsFixChecksum(QUARANTINED_BLOCK, block1.block_info, 3));
   flips = BlockBitFlipsRequired(QUARANTINED_BLOCK, block1.block_info, 3);
   EXPECT_LT(0u, flips);
   EXPECT_GE(3u, flips);
 }
 
 }  // namespace asan
 }  // namespace agent