Heap profiler: implement diffing of snapshots.

src/checks.h

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 85 matching lines @@
              "   Expected: 0x%08x%08x\n#   Found: 0x%08x%08x",
              expected_source, value_source,
              static_cast<uint32_t>(expected >> 32),
              static_cast<uint32_t>(expected),
              static_cast<uint32_t>(value >> 32),
              static_cast<uint32_t>(value));
   }
 }
 
 
+// Helper function used by the CHECK_EQ function when given uint64_t
+// arguments.  Should not be called directly.
+static inline void CheckEqualsHelper(const char* file, int line,
+                                     const char* expected_source,
+                                     uint64_t expected,
+                                     const char* value_source,
+                                     uint64_t value) {
+  if (expected != value) {
+    // Print uint64_t values in hex, as two int32s,
+    // to avoid platform-dependencies.
+    V8_Fatal(file, line,
+             "CHECK_EQ(%s, %s) failed\n#"
+             "   Expected: 0x%08x%08x\n#   Found: 0x%08x%08x",
+             expected_source, value_source,
+             static_cast<uint32_t>(expected >> 32),
+             static_cast<uint32_t>(expected),
+             static_cast<uint32_t>(value >> 32),
+             static_cast<uint32_t>(value));
+  }
+}
+
+
 // Helper function used by the CHECK_NE function when given int
 // arguments.  Should not be called directly.
 static inline void CheckNonEqualsHelper(const char* file,
                                         int line,
                                         const char* unexpected_source,
                                         int unexpected,
                                         const char* value_source,
                                         int value) {
   if (unexpected == value) {
     V8_Fatal(file, line, "CHECK_NE(%s, %s) failed\n#   Value: %i",
@@ skipping 185 matching lines @@
 
 
 #define ASSERT_TAG_ALIGNED(address) \
   ASSERT((reinterpret_cast<intptr_t>(address) & kHeapObjectTagMask) == 0)
 
 #define ASSERT_SIZE_TAG_ALIGNED(size) ASSERT((size & kHeapObjectTagMask) == 0)
 
 #define ASSERT_NOT_NULL(p)  ASSERT_NE(NULL, p)
 
 #endif  // V8_CHECKS_H_