diff options
Diffstat (limited to 'deps/v8/src/base/platform/platform.h')
| -rw-r--r-- | deps/v8/src/base/platform/platform.h | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/deps/v8/src/base/platform/platform.h b/deps/v8/src/base/platform/platform.h index 9259ec8f78..55cff6bf64 100644 --- a/deps/v8/src/base/platform/platform.h +++ b/deps/v8/src/base/platform/platform.h @@ -158,6 +158,14 @@ class V8_BASE_EXPORT OS { static PRINTF_FORMAT(1, 2) void PrintError(const char* format, ...); static PRINTF_FORMAT(1, 0) void VPrintError(const char* format, va_list args); + // Memory access permissions. Only the modes currently used by V8 are listed + // here even though most systems support additional modes. + enum class MemoryPermission { kNoAccess, kReadWrite, kReadWriteExecute }; + + // Allocate/Free memory used by JS heap. Permissions are set according to the + // is_* flags. Returns the address of allocated memory, or NULL if failed. + static void* Allocate(const size_t requested, size_t* allocated, + MemoryPermission access); // Allocate/Free memory used by JS heap. Pages are readable/writable, but // they are not guaranteed to be executable unless 'executable' is true. // Returns the address of allocated memory, or NULL if failed. @@ -167,8 +175,8 @@ class V8_BASE_EXPORT OS { static void Free(void* address, const size_t size); // Allocates a region of memory that is inaccessible. On Windows this reserves - // but does not commit the memory. On Linux, it is equivalent to a call to - // Allocate() followed by Guard(). + // but does not commit the memory. On POSIX systems it allocates memory as + // PROT_NONE, which also prevents it from being committed. static void* AllocateGuarded(const size_t requested); // This is the granularity at which the ProtectCode(...) call can set page |