Add v8_os_page_size flag for cross compilation

src/deoptimizer.cc

Index: src/deoptimizer.cc
diff --git a/src/deoptimizer.cc b/src/deoptimizer.cc
index c489e701e1ce47dd9891dead803a6e0434cdb947..ad036b49038cd41f5ceb482802428f45b8a88444 100644
--- a/src/deoptimizer.cc
+++ b/src/deoptimizer.cc
@@ -24,9 +24,10 @@ namespace internal {
 
 static MemoryChunk* AllocateCodeChunk(MemoryAllocator* allocator) {
   return allocator->AllocateChunk(Deoptimizer::GetMaxDeoptTableSize(),
-                                  base::OS::CommitPageSize(),
-                                  EXECUTABLE,
-                                  NULL);
+                                  FLAG_target_os_page_size != 0

[Michael Lippautz, 2016/11/14 09:24:43]

The deoptimizer already uses the allocator here, so we might as well use
MemoryAllocator::GetCommitPageSize(). (See below)

+                                      ? FLAG_target_os_page_size
+                                      : base::OS::CommitPageSize(),
+                                  EXECUTABLE, NULL);
 }
 
 
@@ -88,7 +89,9 @@ static const int kDeoptTableMaxEpilogueCodeSize = 2 * KB;
 size_t Deoptimizer::GetMaxDeoptTableSize() {
   int entries_size =
       Deoptimizer::kMaxNumberOfEntries * Deoptimizer::table_entry_size_;
-  int commit_page_size = static_cast<int>(base::OS::CommitPageSize());
+  int commit_page_size = static_cast<int>(FLAG_target_os_page_size != 0
+                                              ? FLAG_target_os_page_size
+                                              : base::OS::CommitPageSize());
   int page_count = ((kDeoptTableMaxEpilogueCodeSize + entries_size - 1) /
                     commit_page_size) + 1;
   return static_cast<size_t>(commit_page_size * page_count);