hotspot/src/share/vm/memory/allocation.inline.hpp
author minqi
Tue, 14 May 2013 09:41:12 -0700
changeset 17376 4ee999c3c007
parent 17302 915323420691
child 18069 e6d4971c8650
permissions -rw-r--r--
8012902: remove use of global operator new - take 2 Summary: The fix of 8010992, disable use of global operator new and new[] which caused failure on some tests. This takes two of the bugs also add ALLOW_OPERATOR_NEW_USAGE to prevent crash for third party code calling operator new of jvm on certain platforms. Reviewed-by: coleenp, dholmes, zgu Contributed-by: yumin.qi@oracle.com

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#ifndef SHARE_VM_MEMORY_ALLOCATION_INLINE_HPP
#define SHARE_VM_MEMORY_ALLOCATION_INLINE_HPP

#include "runtime/atomic.inline.hpp"
#include "runtime/os.hpp"

// Explicit C-heap memory management

void trace_heap_malloc(size_t size, const char* name, void *p);
void trace_heap_free(void *p);

#ifndef PRODUCT
// Increments unsigned long value for statistics (not atomic on MP).
inline void inc_stat_counter(volatile julong* dest, julong add_value) {
#if defined(SPARC) || defined(X86)
  // Sparc and X86 have atomic jlong (8 bytes) instructions
  julong value = Atomic::load((volatile jlong*)dest);
  value += add_value;
  Atomic::store((jlong)value, (volatile jlong*)dest);
#else
  // possible word-tearing during load/store
  *dest += add_value;
#endif
}
#endif

// allocate using malloc; will fail if no memory available
inline char* AllocateHeap(size_t size, MEMFLAGS flags, address pc = 0,
    AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) {
  if (pc == 0) {
    pc = CURRENT_PC;
  }
  char* p = (char*) os::malloc(size, flags, pc);
  #ifdef ASSERT
  if (PrintMallocFree) trace_heap_malloc(size, "AllocateHeap", p);
  #endif
  if (p == NULL && alloc_failmode == AllocFailStrategy::EXIT_OOM) {
    vm_exit_out_of_memory(size, OOM_MALLOC_ERROR, "AllocateHeap");
  }
  return p;
}

inline char* ReallocateHeap(char *old, size_t size, MEMFLAGS flags,
    AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) {
  char* p = (char*) os::realloc(old, size, flags, CURRENT_PC);
  #ifdef ASSERT
  if (PrintMallocFree) trace_heap_malloc(size, "ReallocateHeap", p);
  #endif
  if (p == NULL && alloc_failmode == AllocFailStrategy::EXIT_OOM) {
    vm_exit_out_of_memory(size, OOM_MALLOC_ERROR, "ReallocateHeap");
  }
  return p;
}

inline void FreeHeap(void* p, MEMFLAGS memflags = mtInternal) {
  #ifdef ASSERT
  if (PrintMallocFree) trace_heap_free(p);
  #endif
  os::free(p, memflags);
}


template <MEMFLAGS F> void* CHeapObj<F>::operator new(size_t size,
      address caller_pc){
    void* p = (void*)AllocateHeap(size, F, (caller_pc != 0 ? caller_pc : CALLER_PC));
#ifdef ASSERT
    if (PrintMallocFree) trace_heap_malloc(size, "CHeapObj-new", p);
#endif
    return p;
  }

template <MEMFLAGS F> void* CHeapObj<F>::operator new (size_t size,
  const std::nothrow_t&  nothrow_constant, address caller_pc) {
  void* p = (void*)AllocateHeap(size, F, (caller_pc != 0 ? caller_pc : CALLER_PC),
      AllocFailStrategy::RETURN_NULL);
#ifdef ASSERT
    if (PrintMallocFree) trace_heap_malloc(size, "CHeapObj-new", p);
#endif
    return p;
}

template <MEMFLAGS F> void* CHeapObj<F>::operator new [](size_t size,
      address caller_pc){
    return CHeapObj<F>::operator new(size, caller_pc);
}

template <MEMFLAGS F> void* CHeapObj<F>::operator new [](size_t size,
  const std::nothrow_t&  nothrow_constant, address caller_pc) {
    return CHeapObj<F>::operator new(size, nothrow_constant, caller_pc);
}

template <MEMFLAGS F> void CHeapObj<F>::operator delete(void* p){
    FreeHeap(p, F);
}

template <MEMFLAGS F> void CHeapObj<F>::operator delete [](void* p){
    FreeHeap(p, F);
}

template <class E, MEMFLAGS F>
E* ArrayAllocator<E, F>::allocate(size_t length) {
  assert(_addr == NULL, "Already in use");

  _size = sizeof(E) * length;
  _use_malloc = _size < ArrayAllocatorMallocLimit;

  if (_use_malloc) {
    _addr = AllocateHeap(_size, F);
    if (_addr == NULL && _size >=  (size_t)os::vm_allocation_granularity()) {
      // malloc failed let's try with mmap instead
      _use_malloc = false;
    } else {
      return (E*)_addr;
    }
  }

  int alignment = os::vm_allocation_granularity();
  _size = align_size_up(_size, alignment);

  _addr = os::reserve_memory(_size, NULL, alignment, F);
  if (_addr == NULL) {
    vm_exit_out_of_memory(_size, OOM_MMAP_ERROR, "Allocator (reserve)");
  }

  bool success = os::commit_memory(_addr, _size, false /* executable */);
  if (!success) {
    vm_exit_out_of_memory(_size, OOM_MMAP_ERROR, "Allocator (commit)");
  }

  return (E*)_addr;
}

template<class E, MEMFLAGS F>
void ArrayAllocator<E, F>::free() {
  if (_addr != NULL) {
    if (_use_malloc) {
      FreeHeap(_addr, F);
    } else {
      os::release_memory(_addr, _size);
    }
    _addr = NULL;
  }
}

#endif // SHARE_VM_MEMORY_ALLOCATION_INLINE_HPP