// Initialize the methodDataOop corresponding to a given method. void methodDataOopDesc::initialize(methodHandle method) { ResourceMark rm; // Set the method back-pointer. _method = method(); set_creation_mileage(mileage_of(method())); // Initialize flags and trap history. _nof_decompiles = 0; _nof_overflow_recompiles = 0; _nof_overflow_traps = 0; assert(sizeof(_trap_hist) % sizeof(HeapWord) == 0, "align"); Copy::zero_to_words((HeapWord*) &_trap_hist, sizeof(_trap_hist) / sizeof(HeapWord)); // Go through the bytecodes and allocate and initialize the // corresponding data cells. int data_size = 0; int empty_bc_count = 0; // number of bytecodes lacking data BytecodeStream stream(method); Bytecodes::Code c; while ((c = stream.next()) >= 0) { int size_in_bytes = initialize_data(&stream, data_size); data_size += size_in_bytes; if (size_in_bytes == 0) empty_bc_count += 1; } _data_size = data_size; int object_size = in_bytes(data_offset()) + data_size; // Add some extra DataLayout cells (at least one) to track stray traps. int extra_data_count = compute_extra_data_count(data_size, empty_bc_count); int extra_size = extra_data_count * DataLayout::compute_size_in_bytes(0); // Add a cell to record information about modified arguments. // Set up _args_modified array after traps cells so that // the code for traps cells works. DataLayout *dp = data_layout_at(data_size + extra_size); int arg_size = method->size_of_parameters(); dp->initialize(DataLayout::arg_info_data_tag, 0, arg_size+1); object_size += extra_size + DataLayout::compute_size_in_bytes(arg_size+1); // Set an initial hint. Don't use set_hint_di() because // first_di() may be out of bounds if data_size is 0. // In that situation, _hint_di is never used, but at // least well-defined. _hint_di = first_di(); post_initialize(&stream); set_object_is_parsable(object_size); }
bool methodDataOopDesc::is_mature() const { uint current = mileage_of(_method); uint initial = creation_mileage(); if (current < initial) return true; // some sort of overflow uint target; if (ProfileMaturityPercentage <= 0) target = (uint) -ProfileMaturityPercentage; // absolute value else target = (uint)( (ProfileMaturityPercentage * CompileThreshold) / 100 ); return (current >= initial + target); }
void MethodData::initialize() { No_Safepoint_Verifier no_safepoint; // init function atomic wrt GC ResourceMark rm; init(); set_creation_mileage(mileage_of(method())); // Go through the bytecodes and allocate and initialize the // corresponding data cells. int data_size = 0; int empty_bc_count = 0; // number of bytecodes lacking data _data[0] = 0; // apparently not set below. BytecodeStream stream(method()); Bytecodes::Code c; while ((c = stream.next()) >= 0) { int size_in_bytes = initialize_data(&stream, data_size); data_size += size_in_bytes; if (is_empty_data(size_in_bytes, c)) empty_bc_count++; } _data_size = data_size; int object_size = in_bytes(data_offset()) + data_size; // Add some extra DataLayout cells (at least one) to track stray traps. int extra_data_count = compute_extra_data_count(data_size, empty_bc_count); int extra_size = extra_data_count * DataLayout::compute_size_in_bytes(0); object_size += extra_size; Copy::zero_to_bytes((HeapWord*) extra_data_base(), extra_size); #ifndef GRAALVM // Add a cell to record information about modified arguments. // Set up _args_modified array after traps cells so that // the code for traps cells works. DataLayout *dp = data_layout_at(data_size + extra_size); int arg_size = method()->size_of_parameters(); dp->initialize(DataLayout::arg_info_data_tag, 0, arg_size+1); object_size += DataLayout::compute_size_in_bytes(arg_size+1); #endif // Set an initial hint. Don't use set_hint_di() because // first_di() may be out of bounds if data_size is 0. // In that situation, _hint_di is never used, but at // least well-defined. _hint_di = first_di(); post_initialize(&stream); set_size(object_size); }