--- a/hotspot/src/share/vm/memory/allocation.hpp Tue Aug 28 15:15:29 2012 +0200
+++ b/hotspot/src/share/vm/memory/allocation.hpp Wed Oct 17 17:36:48 2012 +0200
@@ -53,6 +53,12 @@
#endif
#endif
+class AllocFailStrategy {
+public:
+ enum AllocFailEnum { EXIT_OOM, RETURN_NULL };
+};
+typedef AllocFailStrategy::AllocFailEnum AllocFailType;
+
// All classes in the virtual machine must be subclassed
// by one of the following allocation classes:
//
@@ -315,7 +321,8 @@
Chunk *_first; // First chunk
Chunk *_chunk; // current chunk
char *_hwm, *_max; // High water mark and max in current chunk
- void* grow(size_t x); // Get a new Chunk of at least size x
+ // Get a new Chunk of at least size x
+ void* grow(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM);
size_t _size_in_bytes; // Size of arena (used for native memory tracking)
NOT_PRODUCT(static julong _bytes_allocated;) // total #bytes allocated since start
@@ -350,14 +357,14 @@
void operator delete(void* p);
// Fast allocate in the arena. Common case is: pointer test + increment.
- void* Amalloc(size_t x) {
+ void* Amalloc(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) {
assert(is_power_of_2(ARENA_AMALLOC_ALIGNMENT) , "should be a power of 2");
x = ARENA_ALIGN(x);
debug_only(if (UseMallocOnly) return malloc(x);)
check_for_overflow(x, "Arena::Amalloc");
NOT_PRODUCT(inc_bytes_allocated(x);)
if (_hwm + x > _max) {
- return grow(x);
+ return grow(x, alloc_failmode);
} else {
char *old = _hwm;
_hwm += x;
@@ -365,13 +372,13 @@
}
}
// Further assume size is padded out to words
- void *Amalloc_4(size_t x) {
+ void *Amalloc_4(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) {
assert( (x&(sizeof(char*)-1)) == 0, "misaligned size" );
debug_only(if (UseMallocOnly) return malloc(x);)
check_for_overflow(x, "Arena::Amalloc_4");
NOT_PRODUCT(inc_bytes_allocated(x);)
if (_hwm + x > _max) {
- return grow(x);
+ return grow(x, alloc_failmode);
} else {
char *old = _hwm;
_hwm += x;
@@ -381,7 +388,7 @@
// Allocate with 'double' alignment. It is 8 bytes on sparc.
// In other cases Amalloc_D() should be the same as Amalloc_4().
- void* Amalloc_D(size_t x) {
+ void* Amalloc_D(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) {
assert( (x&(sizeof(char*)-1)) == 0, "misaligned size" );
debug_only(if (UseMallocOnly) return malloc(x);)
#if defined(SPARC) && !defined(_LP64)
@@ -392,7 +399,7 @@
check_for_overflow(x, "Arena::Amalloc_D");
NOT_PRODUCT(inc_bytes_allocated(x);)
if (_hwm + x > _max) {
- return grow(x); // grow() returns a result aligned >= 8 bytes.
+ return grow(x, alloc_failmode); // grow() returns a result aligned >= 8 bytes.
} else {
char *old = _hwm;
_hwm += x;
@@ -412,7 +419,8 @@
if (((char*)ptr) + size == _hwm) _hwm = (char*)ptr;
}
- void *Arealloc( void *old_ptr, size_t old_size, size_t new_size );
+ void *Arealloc( void *old_ptr, size_t old_size, size_t new_size,
+ AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM);
// Move contents of this arena into an empty arena
Arena *move_contents(Arena *empty_arena);
@@ -458,9 +466,12 @@
//%note allocation_1
-extern char* resource_allocate_bytes(size_t size);
-extern char* resource_allocate_bytes(Thread* thread, size_t size);
-extern char* resource_reallocate_bytes( char *old, size_t old_size, size_t new_size);
+extern char* resource_allocate_bytes(size_t size,
+ AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM);
+extern char* resource_allocate_bytes(Thread* thread, size_t size,
+ AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM);
+extern char* resource_reallocate_bytes( char *old, size_t old_size, size_t new_size,
+ AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM);
extern void resource_free_bytes( char *old, size_t size );
//----------------------------------------------------------------------
@@ -496,6 +507,8 @@
public:
void* operator new(size_t size, allocation_type type, MEMFLAGS flags);
+ void* operator new(size_t size, const std::nothrow_t& nothrow_constant,
+ allocation_type type, MEMFLAGS flags);
void* operator new(size_t size, Arena *arena) {
address res = (address)arena->Amalloc(size);
DEBUG_ONLY(set_allocation_type(res, ARENA);)
@@ -506,6 +519,13 @@
DEBUG_ONLY(set_allocation_type(res, RESOURCE_AREA);)
return res;
}
+
+ void* operator new(size_t size, const std::nothrow_t& nothrow_constant) {
+ address res = (address)resource_allocate_bytes(size, AllocFailStrategy::RETURN_NULL);
+ DEBUG_ONLY(if (res != NULL) set_allocation_type(res, RESOURCE_AREA);)
+ return res;
+ }
+
void operator delete(void* p);
};