Add methods to enable configuration of ResourceConstraints based on limits derived at runtime.

src/globals.h

 // Copyright 2012 the V8 project authors. All rights reserved.
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 // modification, are permitted provided that the following conditions are
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@@ skipping 230 matching lines @@
 
 const int kDoubleSizeLog2 = 3;
 
 // Size of the state of a the random number generator.
 const int kRandomStateSize = 2 * kIntSize;
 
 #if V8_HOST_ARCH_64_BIT
 const int kPointerSizeLog2 = 3;
 const intptr_t kIntptrSignBit = V8_INT64_C(0x8000000000000000);
 const uintptr_t kUintptrAllBitsSet = V8_UINT64_C(0xFFFFFFFFFFFFFFFF);
+const bool kIs64BitArch = true;

[Hannes Payer (out of office), 2013/09/24 13:43:44]

I think these two constants are not used anymore.

[rmcilroy, 2013/09/24 14:39:23]

It's used for the code_range_size_ in heap.cc.  I can change that to use
(kPointerSize == 8) if you prefer, but I think kIs64BitArch is clearer.  WDYT?

[Hannes Payer (out of office), 2013/09/24 15:32:16]

Ah, yes. Hmm, let's keep the kIs64BitArch constant. That's cleaner.

 #else
 const int kPointerSizeLog2 = 2;
 const intptr_t kIntptrSignBit = 0x80000000;
 const uintptr_t kUintptrAllBitsSet = 0xFFFFFFFFu;
+const bool kIs64BitArch = false;
 #endif
 
 const int kBitsPerByte = 8;
 const int kBitsPerByteLog2 = 3;
 const int kBitsPerPointer = kPointerSize * kBitsPerByte;
 const int kBitsPerInt = kIntSize * kBitsPerByte;
 
 // IEEE 754 single precision floating point number bit layout.
 const uint32_t kBinary32SignMask = 0x80000000u;
 const uint32_t kBinary32ExponentMask = 0x7f800000u;
@@ skipping 135 matching lines @@
 // the backend, so both modes are represented by the kStrictMode value.
 enum StrictModeFlag {
   kNonStrictMode,
   kStrictMode
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_GLOBALS_H_