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

runtime/vm/signal_handler_linux.cc

 // Copyright (c) 2013, 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"
 #include "vm/instructions.h"
+#include "vm/signal_handler.h"
 #include "vm/simulator.h"
-#include "vm/signal_handler.h"
 #if defined(HOST_OS_LINUX)
 
 namespace dart {
 
 uintptr_t SignalHandler::GetProgramCounter(const mcontext_t& mcontext) {
   uintptr_t pc = 0;
 
 #if defined(HOST_ARCH_IA32)
   pc = static_cast<uintptr_t>(mcontext.gregs[REG_EIP]);
 #elif defined(HOST_ARCH_X64)
   pc = static_cast<uintptr_t>(mcontext.gregs[REG_RIP]);
 #elif defined(HOST_ARCH_ARM)
   pc = static_cast<uintptr_t>(mcontext.arm_pc);
 #elif defined(HOST_ARCH_ARM64)
   pc = static_cast<uintptr_t>(mcontext.pc);
 #else
 #error Unsupported architecture.
 #endif  // HOST_ARCH_...
   return pc;
 }
 
-
 uintptr_t SignalHandler::GetFramePointer(const mcontext_t& mcontext) {
   uintptr_t fp = 0;
 
 #if defined(HOST_ARCH_IA32)
   fp = static_cast<uintptr_t>(mcontext.gregs[REG_EBP]);
 #elif defined(HOST_ARCH_X64)
   fp = static_cast<uintptr_t>(mcontext.gregs[REG_RBP]);
 #elif defined(HOST_ARCH_ARM)
   // B1.3.3 Program Status Registers (PSRs)
   if ((mcontext.arm_cpsr & (1 << 5)) != 0) {
     // Thumb mode.
     fp = static_cast<uintptr_t>(mcontext.arm_r7);
   } else {
     // ARM mode.
     fp = static_cast<uintptr_t>(mcontext.arm_fp);
   }
 #elif defined(HOST_ARCH_ARM64)
   fp = static_cast<uintptr_t>(mcontext.regs[29]);
 #else
 #error Unsupported architecture.
 #endif  // HOST_ARCH_...
 
   return fp;
 }
 
-
 uintptr_t SignalHandler::GetCStackPointer(const mcontext_t& mcontext) {
   uintptr_t sp = 0;
 
 #if defined(HOST_ARCH_IA32)
   sp = static_cast<uintptr_t>(mcontext.gregs[REG_ESP]);
 #elif defined(HOST_ARCH_X64)
   sp = static_cast<uintptr_t>(mcontext.gregs[REG_RSP]);
 #elif defined(HOST_ARCH_ARM)
   sp = static_cast<uintptr_t>(mcontext.arm_sp);
 #elif defined(HOST_ARCH_ARM64)
   sp = static_cast<uintptr_t>(mcontext.sp);
 #else
 #error Unsupported architecture.
 #endif  // HOST_ARCH_...
   return sp;
 }
 
-
 uintptr_t SignalHandler::GetDartStackPointer(const mcontext_t& mcontext) {
 #if defined(TARGET_ARCH_ARM64) && !defined(USING_SIMULATOR)
   return static_cast<uintptr_t>(mcontext.regs[SPREG]);
 #else
   return GetCStackPointer(mcontext);
 #endif
 }
 
-
 uintptr_t SignalHandler::GetLinkRegister(const mcontext_t& mcontext) {
   uintptr_t lr = 0;
 
 #if defined(HOST_ARCH_IA32)
   lr = 0;
 #elif defined(HOST_ARCH_X64)
   lr = 0;
 #elif defined(HOST_ARCH_ARM)
   lr = static_cast<uintptr_t>(mcontext.arm_lr);
 #elif defined(HOST_ARCH_ARM64)
   lr = static_cast<uintptr_t>(mcontext.regs[30]);
 #else
 #error Unsupported architecture.
 #endif  // HOST_ARCH_...
   return lr;
 }
 
-
 void SignalHandler::InstallImpl(SignalAction action) {
   struct sigaction act;
   act.sa_handler = NULL;
   act.sa_sigaction = action;
   sigemptyset(&act.sa_mask);
   act.sa_flags = SA_RESTART | SA_SIGINFO;
   int r = sigaction(SIGPROF, &act, NULL);
   ASSERT(r == 0);
 }
 
-
 void SignalHandler::Remove() {
   // Ignore future SIGPROF signals because by default SIGPROF will terminate
   // the process and we may have some signals in flight.
   struct sigaction act;
   act.sa_handler = SIG_IGN;
   sigemptyset(&act.sa_mask);
   act.sa_flags = 0;
   int r = sigaction(SIGPROF, &act, NULL);
   ASSERT(r == 0);
 }
 
-
 }  // namespace dart
 
 #endif  // defined(HOST_OS_LINUX)