A64: Synchronize with r16918.

src/platform-linux.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 20 matching lines @@
 #include <pthread.h>
 #include <semaphore.h>
 #include <signal.h>
 #include <sys/prctl.h>
 #include <sys/time.h>
 #include <sys/resource.h>
 #include <sys/syscall.h>
 #include <sys/types.h>
 #include <stdlib.h>
 
-#if defined(__GLIBC__) && !defined(__UCLIBC__)
-#include <execinfo.h>
-#include <cxxabi.h>
-#endif
-
 // Ubuntu Dapper requires memory pages to be marked as
 // executable. Otherwise, OS raises an exception when executing code
 // in that page.
 #include <sys/types.h>  // mmap & munmap
 #include <sys/mman.h>   // mmap & munmap
 #include <sys/stat.h>   // open
 #include <fcntl.h>      // open
 #include <unistd.h>     // sysconf
 #include <strings.h>    // index
 #include <errno.h>
 #include <stdarg.h>
 
 // GLibc on ARM defines mcontext_t has a typedef for 'struct sigcontext'.
 // Old versions of the C library <signal.h> didn't define the type.
 #if defined(__ANDROID__) && !defined(__BIONIC_HAVE_UCONTEXT_T) && \
     (defined(__arm__) || defined(__aarch64__)) && \
     !defined(__BIONIC_HAVE_STRUCT_SIGCONTEXT)
 #include <asm/sigcontext.h>
 #endif
 
 #undef MAP_TYPE
 
 #include "v8.h"
 
-#include "platform-posix.h"
 #include "platform.h"
 #include "v8threads.h"
 #include "vm-state-inl.h"
 
 
 namespace v8 {
 namespace internal {
 
 
 #ifdef __arm__
@@ skipping 67 matching lines @@
   if (mbase == MAP_FAILED) {
     LOG(i::Isolate::Current(),
         StringEvent("OS::Allocate", "mmap failed"));
     return NULL;
   }
   *allocated = msize;
   return mbase;
 }
 
 
-void OS::DumpBacktrace() {
-  // backtrace is a glibc extension.
-#if defined(__GLIBC__) && !defined(__UCLIBC__)
-  POSIXBacktraceHelper<backtrace, backtrace_symbols>::DumpBacktrace();
-#endif
-}
-
-
 class PosixMemoryMappedFile : public OS::MemoryMappedFile {
  public:
   PosixMemoryMappedFile(FILE* file, void* memory, int size)
     : file_(file), memory_(memory), size_(size) { }
   virtual ~PosixMemoryMappedFile();
   virtual void* memory() { return memory_; }
   virtual int size() { return size_; }
  private:
   FILE* file_;
   void* memory_;
@@ skipping 274 matching lines @@
 bool VirtualMemory::ReleaseRegion(void* base, size_t size) {
   return munmap(base, size) == 0;
 }
 
 
 bool VirtualMemory::HasLazyCommits() {
   return true;
 }
 
 } }  // namespace v8::internal