deps: upgrade V8 to 4.5.103.24

Upgrade to the latest branch-head for V8 4.5. For the full commit log see
https://github.com/v8/v8-git-mirror/commits/4.5.103.24

PR-URL: https://github.com/nodejs/node/pull/2509
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>

5 files changed, 33 insertions, 12 deletions

diff --git a/deps/v8/src/base/atomicops_internals_arm_gcc.h b/deps/v8/src/base/atomicops_internals_arm_gcc.h
index 069b1ffa88..e399657e13 100644
--- a/deps/v8/src/base/atomicops_internals_arm_gcc.h
+++ b/deps/v8/src/base/atomicops_internals_arm_gcc.h
@@ -59,11 +59,11 @@ inline void MemoryBarrier() {
 // variant of the target architecture is being used. This tests against
 // any known ARMv6 or ARMv7 variant, where it is possible to directly
 // use ldrex/strex instructions to implement fast atomic operations.
-#if defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) || \
+#if defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) ||  \
     defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) || \
-    defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) || \
+    defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) ||  \
     defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) || \
-    defined(__ARM_ARCH_6KZ__) || defined(__ARM_ARCH_6T2__)
+    defined(__ARM_ARCH_6ZK__) || defined(__ARM_ARCH_6T2__)
 
 inline Atomic32 NoBarrier_CompareAndSwap(volatile Atomic32* ptr,
                                          Atomic32 old_value,
diff --git a/deps/v8/src/base/bits.h b/deps/v8/src/base/bits.h
index 5c7cd74c61..abcfd9a9ed 100644
--- a/deps/v8/src/base/bits.h
+++ b/deps/v8/src/base/bits.h
@@ -44,6 +44,17 @@ inline unsigned CountPopulation64(uint64_t value) {
 }
 
 
+// Overloaded versions of CountPopulation32/64.
+inline unsigned CountPopulation(uint32_t value) {
+  return CountPopulation32(value);
+}
+
+
+inline unsigned CountPopulation(uint64_t value) {
+  return CountPopulation64(value);
+}
+
+
 // CountLeadingZeros32(value) returns the number of zero bits following the most
 // significant 1 bit in |value| if |value| is non-zero, otherwise it returns 32.
 inline unsigned CountLeadingZeros32(uint32_t value) {
@@ -225,6 +236,19 @@ int32_t SignedDiv32(int32_t lhs, int32_t rhs);
 int32_t SignedMod32(int32_t lhs, int32_t rhs);
 
 
+// UnsignedAddOverflow32(lhs,rhs,val) performs an unsigned summation of |lhs|
+// and |rhs| and stores the result into the variable pointed to by |val| and
+// returns true if the unsigned summation resulted in an overflow.
+inline bool UnsignedAddOverflow32(uint32_t lhs, uint32_t rhs, uint32_t* val) {
+#if V8_HAS_BUILTIN_SADD_OVERFLOW
+  return __builtin_uadd_overflow(lhs, rhs, val);
+#else
+  *val = lhs + rhs;
+  return *val < (lhs | rhs);
+#endif
+}
+
+
 // UnsignedDiv32(lhs, rhs) divides |lhs| by |rhs| and returns the quotient
 // truncated to uint32. If |rhs| is zero, then zero is returned.
 inline uint32_t UnsignedDiv32(uint32_t lhs, uint32_t rhs) {
diff --git a/deps/v8/src/base/macros.h b/deps/v8/src/base/macros.h
index e98b4f569f..6dc96f4f3b 100644
--- a/deps/v8/src/base/macros.h
+++ b/deps/v8/src/base/macros.h
@@ -15,12 +15,9 @@
 #include "src/base/logging.h"
 
 
-// The expression OFFSET_OF(type, field) computes the byte-offset
-// of the specified field relative to the containing type. This
-// corresponds to 'offsetof' (in stddef.h), except that it doesn't
-// use 0 or NULL, which causes a problem with the compiler warnings
-// we have enabled (which is also why 'offsetof' doesn't seem to work).
-// Here we simply use the aligned, non-zero value 16.
+// TODO(all) Replace all uses of this macro with C++'s offsetof. To do that, we
+// have to make sure that only standard-layout types and simple field
+// designators are used.
 #define OFFSET_OF(type, field) \
   (reinterpret_cast<intptr_t>(&(reinterpret_cast<type*>(16)->field)) - 16)
 
diff --git a/deps/v8/src/base/safe_math_impl.h b/deps/v8/src/base/safe_math_impl.h
index 055e2a0275..eb2a151191 100644
--- a/deps/v8/src/base/safe_math_impl.h
+++ b/deps/v8/src/base/safe_math_impl.h
@@ -208,8 +208,8 @@ typename enable_if<std::numeric_limits<T>::is_integer &&
                        (sizeof(T) * 2 > sizeof(uintmax_t)),
                    T>::type
 CheckedMul(T x, T y, RangeConstraint* validity) {
-  // if either side is zero then the result will be zero.
-  if (!(x || y)) {
+  // If either side is zero then the result will be zero.
+  if (!x || !y) {
     return RANGE_VALID;
 
   } else if (x > 0) {
diff --git a/deps/v8/src/base/sys-info.cc b/deps/v8/src/base/sys-info.cc
index 617a88ea81..a2dc6ab27f 100644
--- a/deps/v8/src/base/sys-info.cc
+++ b/deps/v8/src/base/sys-info.cc
@@ -44,7 +44,7 @@ int SysInfo::NumberOfProcessors() {
   }
   return static_cast<int>(result);
 #elif V8_OS_WIN
-  SYSTEM_INFO system_info = {0};
+  SYSTEM_INFO system_info = {};
   ::GetNativeSystemInfo(&system_info);
   return static_cast<int>(system_info.dwNumberOfProcessors);
 #endif