Expose transferable constructor to Int8List

runtime/vm/os_linux.cc

Index: runtime/vm/os_linux.cc
diff --git a/runtime/vm/os_linux.cc b/runtime/vm/os_linux.cc
index a33effe8d2cf6449111576eee79d49a8470ad2f7..c7bfcbcce6f185f1725687776eef9616b7109715 100644
--- a/runtime/vm/os_linux.cc
+++ b/runtime/vm/os_linux.cc
@@ -6,6 +6,7 @@
 
 #include <errno.h>
 #include <limits.h>
+#include <malloc.h>
 #include <time.h>
 #include <sys/resource.h>
 #include <sys/time.h>
@@ -67,6 +68,23 @@ int64_t OS::GetCurrentTimeMicros() {
 }
 
 
+void* OS::AlignedAllocate(intptr_t size, intptr_t alignment) {
+  const int kMinimumAlignment = 16;
+  ASSERT(Utils::IsPowerOfTwo(alignment));
+  ASSERT(alignment >= kMinimumAlignment);
+  void* p = memalign(alignment, size);
+  if (p == NULL) {
+    UNREACHABLE();
+  }
+  return p;
+}
+
+
+void OS::AlignedFree(void* ptr) {
+  free(ptr);
+}
+
+
 // TODO(5411554):  May need to hoist these architecture dependent code
 // into a architecture specific file e.g: os_ia32_linux.cc
 word OS::ActivationFrameAlignment() {