Implemented processing of compressed log files.

src/log-utils.cc

 // Copyright 2009 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 243 matching lines @@
 
 
 void LogMessageBuilder::AppendAddress(Address addr) {
   static Address last_address_ = NULL;
   AppendAddress(addr, last_address_);
   last_address_ = addr;
 }
 
 
 void LogMessageBuilder::AppendAddress(Address addr, Address bias) {
-  if (!FLAG_compress_log || bias == NULL) {
+  if (!FLAG_compress_log) {
     Append("0x%" V8PRIxPTR, addr);
+  } else if (bias == NULL) {
+    Append("%" V8PRIxPTR, addr);
   } else {
-    intptr_t delta = addr - bias;
-    // To avoid printing negative offsets in an unsigned form,
-    // we are printing an absolute value with a sign.
-    const char sign = delta >= 0 ? '+' : '-';
-    if (sign == '-') { delta = -delta; }
+    uintptr_t delta;
+    char sign;
+    if (addr >= bias) {
+      delta = addr - bias;
+      sign = '+';
+    } else {
+      delta = bias - addr;
+      sign = '-';
+    }
     Append("%c%" V8PRIxPTR, sign, delta);
   }
 }
 
 
 void LogMessageBuilder::AppendDetailed(String* str, bool show_impl_info) {
   AssertNoAllocation no_heap_allocation;  // Ensure string stay valid.
   int len = str->length();
   if (len > 0x1000)
     len = 0x1000;
@@ skipping 192 matching lines @@
     PrintBackwardReference(backref, best.distance, best.copy_from_pos);
     ASSERT(strlen(backref.start()) - best.backref_size == 0);
     prev_record->Truncate(unchanged_len + best.backref_size);
   }
   return true;
 }
 
 #endif  // ENABLE_LOGGING_AND_PROFILING
 
 } }  // namespace v8::internal