VM: Re-format to use at most one newline between functions

runtime/vm/virtual_memory_fuchsia.cc

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(HOST_OS_FUCHSIA)
 
 #include "vm/virtual_memory.h"
 
 #include <magenta/process.h>
@@ skipping 72 matching lines @@
   }
 #endif
   LOG_INFO("AddVmar(%d, %lx, %ld) at index = %ld\n", vmar, addr, size, idx);
   VmarListElement new_mapping;
   new_mapping.vmar = vmar;
   new_mapping.addr = addr;
   new_mapping.size = size;
   vmar_array_.InsertAt(idx, new_mapping);
 }
 
-
 intptr_t VmarList::LookupVmarIndexLocked(uword addr) {
   // Binary search for the vmar containing addr.
   intptr_t imin = 0;
   intptr_t imax = vmar_array_.length();
   while (imax >= imin) {
     const intptr_t imid = ((imax - imin) / 2) + imin;
     const VmarListElement& mapping = vmar_array_.At(imid);
     if ((mapping.addr + mapping.size) <= addr) {
       imin = imid + 1;
     } else if (mapping.addr > addr) {
       imax = imid - 1;
     } else {
       return imid;
     }
   }
   return -1;
 }
 
-
 mx_handle_t VmarList::LookupVmar(uword addr) {
   MutexLocker ml(vmar_array_lock_);
   LOG_INFO("LookupVmar(%lx)\n", addr);
   const intptr_t idx = LookupVmarIndexLocked(addr);
   if (idx == -1) {
     LOG_ERR("LookupVmar(%lx) NOT FOUND\n", addr);
     return MX_HANDLE_INVALID;
   }
   LOG_INFO("LookupVmar(%lx) found at %ld\n", addr, idx);
   return vmar_array_[idx].vmar;
 }
 
-
 void VmarList::RemoveVmar(uword addr) {
   MutexLocker ml(vmar_array_lock_);
   LOG_INFO("RemoveVmar(%lx)\n", addr);
   const intptr_t idx = LookupVmarIndexLocked(addr);
   ASSERT(idx != -1);
 #if defined(DEBUG)
   mx_handle_t vmar = vmar_array_[idx].vmar;
 #endif
   // Swap idx to the end, and then RemoveLast()
   const intptr_t length = vmar_array_.length();
   for (intptr_t i = idx; i < length - 1; i++) {
     vmar_array_.Swap(i, i + 1);
   }
 #if defined(DEBUG)
   const VmarListElement& mapping = vmar_array_.Last();
   ASSERT(mapping.vmar == vmar);
 #endif
   vmar_array_.RemoveLast();
 }
 
-
 uword VirtualMemory::page_size_ = 0;
 
-
 void VirtualMemory::InitOnce() {
   page_size_ = getpagesize();
 }
 
-
 VirtualMemory* VirtualMemory::ReserveInternal(intptr_t size) {
   ASSERT(Utils::IsAligned(size, page_size_));
   mx_handle_t vmar = MX_HANDLE_INVALID;
   uword addr = 0;
   const uint32_t flags = MX_VM_FLAG_COMPACT | MX_VM_FLAG_CAN_MAP_SPECIFIC |
                          MX_VM_FLAG_CAN_MAP_READ | MX_VM_FLAG_CAN_MAP_WRITE |
                          MX_VM_FLAG_CAN_MAP_EXECUTE;
   mx_status_t status =
       mx_vmar_allocate(mx_vmar_root_self(), 0, size, flags, &vmar, &addr);
   if (status != MX_OK) {
     LOG_ERR("mx_vmar_allocate(size = %ld) failed: %s\n", size,
             mx_status_get_string(status));
     return NULL;
   }
   VmarList::AddVmar(vmar, addr, size);
   MemoryRegion region(reinterpret_cast<void*>(addr), size);
   return new VirtualMemory(region, vmar);
 }
 
-
 VirtualMemory::~VirtualMemory() {
   if (vm_owns_region()) {
     mx_handle_t vmar = static_cast<mx_handle_t>(handle());
     mx_status_t status = mx_vmar_destroy(vmar);
     if (status != MX_OK) {
       LOG_ERR("mx_vmar_destroy failed: %s\n", mx_status_get_string(status));
     }
     status = mx_handle_close(vmar);
     if (status != MX_OK) {
       LOG_ERR("mx_handle_close failed: %s\n", mx_status_get_string(status));
     }
     VmarList::RemoveVmar(start());
   }
 }
 
-
 bool VirtualMemory::FreeSubSegment(int32_t handle,
                                    void* address,
                                    intptr_t size) {
   mx_handle_t vmar = static_cast<mx_handle_t>(handle);
   mx_status_t status =
       mx_vmar_unmap(vmar, reinterpret_cast<uintptr_t>(address), size);
   if (status != MX_OK) {
     LOG_ERR("mx_vmar_unmap failed: %s\n", mx_status_get_string(status));
     return false;
   }
   return true;
 }
 
-
 bool VirtualMemory::Commit(uword addr,
                            intptr_t size,
                            bool executable,
                            const char* name) {
   ASSERT(Contains(addr));
   ASSERT(Contains(addr + size) || (addr + size == end()));
   mx_handle_t vmo = MX_HANDLE_INVALID;
   mx_status_t status = mx_vmo_create(size, 0u, &vmo);
   if (status != MX_OK) {
     LOG_ERR("mx_vmo_create(%ld) failed: %s\n", size,
@@ skipping 23 matching lines @@
     LOG_ERR("mx_vmar_map: addr != mapped_addr: %lx != %lx\n", addr,
             mapped_addr);
     return false;
   }
   mx_handle_close(vmo);
   LOG_INFO("Commit(%lx, %ld, %s): success\n", addr, size,
            executable ? "executable" : "");
   return true;
 }
 
-
 bool VirtualMemory::Protect(void* address, intptr_t size, Protection mode) {
   ASSERT(Thread::Current()->IsMutatorThread() ||
          Isolate::Current()->mutator_thread()->IsAtSafepoint());
   const uword start_address = reinterpret_cast<uword>(address);
   const uword end_address = start_address + size;
   const uword page_address = Utils::RoundDown(start_address, PageSize());
   mx_handle_t vmar = VmarList::LookupVmar(page_address);
   ASSERT(vmar != MX_HANDLE_INVALID);
   uint32_t prot = 0;
   switch (mode) {
@@ skipping 23 matching lines @@
     return false;
   }
   LOG_INFO("mx_vmar_protect(%lx, %lx, %x) success\n", page_address,
            end_address - page_address, prot);
   return true;
 }
 
 }  // namespace dart
 
 #endif  // defined(HOST_OS_FUCHSIA)