/* * Copyright (c) 1997, 2022, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. *
*/
CodeletMark::CodeletMark(InterpreterMacroAssembler*& masm, constchar* description,
Bytecodes::Code bytecode) :
_clet((InterpreterCodelet*)AbstractInterpreter::code()->request(codelet_size())),
_cb(_clet->code_begin(), _clet->code_size()) { // Request all space (add some slack for Codelet data).
assert(_clet != NULL, "we checked not enough space already");
// Initialize Codelet attributes.
_clet->initialize(description, bytecode); // Create assembler for code generation.
masm = new InterpreterMacroAssembler(&_cb);
_masm = &masm;
}
CodeletMark::~CodeletMark() { // Align so printing shows nop's instead of random code at the end (Codelets are aligned).
(*_masm)->align(wordSize); // Make sure all code is in code buffer.
(*_masm)->flush();
// Commit Codelet. int committed_code_size = (*_masm)->code()->pure_insts_size(); if (committed_code_size > 0) { // This is the ONE place where we pickup any assembly remarks and debug // strings, and propagate these to the codelet.
NOT_PRODUCT(_clet->use_remarks((*_masm)->code()->asm_remarks()));
NOT_PRODUCT(_clet->use_strings((*_masm)->code()->dbg_strings()));
AbstractInterpreter::code()->commit(committed_code_size);
} // Make sure nobody can use _masm outside a CodeletMark lifespan.
*_masm = NULL;
}
// The reason that interpreter initialization is split into two parts is that the first part // needs to run before methods are loaded (which with CDS implies linked also), and the other // part needs to run after. The reason is that when methods are loaded (with CDS) or linked // (without CDS), the i2c adapters are generated that assert we are currently in the interpreter. // Asserting that requires knowledge about where the interpreter is in memory. Therefore, // establishing the interpreter address must be done before methods are loaded. However, // we would like to actually generate the interpreter after methods are loaded. That allows // us to remove otherwise hardcoded offsets regarding fields that are needed in the interpreter // code. This leads to a split if 1. reserving the memory for the interpreter, 2. loading methods // and 3. generating the interpreter. void interpreter_init_stub() {
Interpreter::initialize_stub();
}
void interpreter_init_code() {
Interpreter::initialize_code(); // need to hit every safepoint in order to call zapping routine // register the interpreter
Forte::register_stub( "Interpreter",
AbstractInterpreter::code()->code_start(),
AbstractInterpreter::code()->code_end()
);
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