diff options
Diffstat (limited to 'deps/v8/src/platform-posix.cc')
| -rw-r--r-- | deps/v8/src/platform-posix.cc | 20 |
1 files changed, 3 insertions, 17 deletions
diff --git a/deps/v8/src/platform-posix.cc b/deps/v8/src/platform-posix.cc index 2cf898dd60..f76ec44332 100644 --- a/deps/v8/src/platform-posix.cc +++ b/deps/v8/src/platform-posix.cc @@ -115,26 +115,11 @@ void* OS::GetRandomMmapAddr() { raw_addr &= V8_UINT64_C(0x3ffffffff000); #else uint32_t raw_addr = V8::RandomPrivate(isolate); - - raw_addr &= 0x3ffff000; - -# ifdef __sun - // For our Solaris/illumos mmap hint, we pick a random address in the bottom - // half of the top half of the address space (that is, the third quarter). - // Because we do not MAP_FIXED, this will be treated only as a hint -- the - // system will not fail to mmap() because something else happens to already - // be mapped at our random address. We deliberately set the hint high enough - // to get well above the system's break (that is, the heap); Solaris and - // illumos will try the hint and if that fails allocate as if there were - // no hint at all. The high hint prevents the break from getting hemmed in - // at low values, ceding half of the address space to the system heap. - raw_addr += 0x80000000; -# else // The range 0x20000000 - 0x60000000 is relatively unpopulated across a // variety of ASLR modes (PAE kernel, NX compat mode, etc) and on macos // 10.6 and 10.7. + raw_addr &= 0x3ffff000; raw_addr += 0x20000000; -# endif #endif return reinterpret_cast<void*>(raw_addr); } @@ -219,7 +204,7 @@ int64_t OS::Ticks() { double OS::DaylightSavingsOffset(double time) { - if (isnan(time)) return nan_value(); + if (std::isnan(time)) return nan_value(); time_t tv = static_cast<time_t>(floor(time/msPerSecond)); struct tm* t = localtime(&tv); if (NULL == t) return nan_value(); @@ -349,6 +334,7 @@ OS::MemMoveFunction CreateMemMoveFunction(); // Copy memory area. No restrictions. void OS::MemMove(void* dest, const void* src, size_t size) { + if (size == 0) return; // Note: here we rely on dependent reads being ordered. This is true // on all architectures we currently support. (*memmove_function)(dest, src, size); |