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comparison src/share/vm/code/vtableStubs.cpp @ 12294:891687731b59

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7009641: Don't fail VM when CodeCache is full Summary: Allocation in the code cache returns NULL instead of failing the entire VM Reviewed-by: kvn, iveresov
author anoll
date Tue, 24 Sep 2013 15:56:25 +0200
parents b2e698d2276c
children 9341a9963d36
comparison
equal deleted inserted replaced
12274:8a6a85321d3a 12294:891687731b59
44 44
45 address VtableStub::_chunk = NULL; 45 address VtableStub::_chunk = NULL;
46 address VtableStub::_chunk_end = NULL; 46 address VtableStub::_chunk_end = NULL;
47 VMReg VtableStub::_receiver_location = VMRegImpl::Bad(); 47 VMReg VtableStub::_receiver_location = VMRegImpl::Bad();
48 48
49 static int num_vtable_chunks = 0;
50
51 49
52 void* VtableStub::operator new(size_t size, int code_size) throw() { 50 void* VtableStub::operator new(size_t size, int code_size) throw() {
53 assert(size == sizeof(VtableStub), "mismatched size"); 51 assert(size == sizeof(VtableStub), "mismatched size");
54 num_vtable_chunks++;
55 // compute real VtableStub size (rounded to nearest word) 52 // compute real VtableStub size (rounded to nearest word)
56 const int real_size = round_to(code_size + sizeof(VtableStub), wordSize); 53 const int real_size = round_to(code_size + sizeof(VtableStub), wordSize);
57 // malloc them in chunks to minimize header overhead 54 // malloc them in chunks to minimize header overhead
58 const int chunk_factor = 32; 55 const int chunk_factor = 32;
59 if (_chunk == NULL || _chunk + real_size > _chunk_end) { 56 if (_chunk == NULL || _chunk + real_size > _chunk_end) {
60 const int bytes = chunk_factor * real_size + pd_code_alignment(); 57 const int bytes = chunk_factor * real_size + pd_code_alignment();
61 BufferBlob* blob = BufferBlob::create("vtable chunks", bytes); 58 BufferBlob* blob = BufferBlob::create("vtable chunks", bytes);
62 if (blob == NULL) { 59 if (blob == NULL) {
63 vm_exit_out_of_memory(bytes, OOM_MALLOC_ERROR, "CodeCache: no room for vtable chunks"); 60 return NULL;
64 } 61 }
65 _chunk = blob->content_begin(); 62 _chunk = blob->content_begin();
66 _chunk_end = _chunk + bytes; 63 _chunk_end = _chunk + bytes;
67 Forte::register_stub("vtable stub", _chunk, _chunk_end); 64 Forte::register_stub("vtable stub", _chunk, _chunk_end);
68 // Notify JVMTI about this stub. The event will be recorded by the enclosing 65 // Notify JVMTI about this stub. The event will be recorded by the enclosing
119 if (is_vtable_stub) { 116 if (is_vtable_stub) {
120 s = create_vtable_stub(vtable_index); 117 s = create_vtable_stub(vtable_index);
121 } else { 118 } else {
122 s = create_itable_stub(vtable_index); 119 s = create_itable_stub(vtable_index);
123 } 120 }
121
122 // Creation of vtable or itable can fail if there is not enough free space in the code cache.
123 if (s == NULL) {
124 return NULL;
125 }
126
124 enter(is_vtable_stub, vtable_index, s); 127 enter(is_vtable_stub, vtable_index, s);
125 if (PrintAdapterHandlers) { 128 if (PrintAdapterHandlers) {
126 tty->print_cr("Decoding VtableStub %s[%d]@%d", 129 tty->print_cr("Decoding VtableStub %s[%d]@%d",
127 is_vtable_stub? "vtbl": "itbl", vtable_index, VtableStub::receiver_location()); 130 is_vtable_stub? "vtbl": "itbl", vtable_index, VtableStub::receiver_location());
128 Disassembler::decode(s->code_begin(), s->code_end()); 131 Disassembler::decode(s->code_begin(), s->code_end());