/*
* Copyright ( c ) 1997 , 2020 , 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 .
*
*/
#include "precompiled.hpp"
#include "asm/macroAssembler.hpp"
#include "asm/macroAssembler.inline.hpp"
#include "code/codeCache.hpp"
#include "compiler/disassembler.hpp"
#include "oops/oop.inline.hpp"
#include "prims/forte.hpp"
#include "prims/jvmtiExport.hpp"
#include "runtime/stubCodeGenerator.hpp"
// Implementation of StubCodeDesc
StubCodeDesc* StubCodeDesc::_list = NULL;
bool StubCodeDesc::_frozen = false ;
StubCodeDesc* StubCodeDesc::desc_for(address pc) {
StubCodeDesc* p = _list;
while (p != NULL && !p->contains(pc)) {
p = p->_next;
}
return p;
}
void StubCodeDesc::freeze() {
assert(!_frozen, "repeated freeze operation" );
_frozen = true ;
}
void StubCodeDesc::print_on(outputStream* st) const {
st->print("%s" , group());
st->print("::" );
st->print("%s" , name());
st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT "] (%d bytes)" , p2i(begin()), p2i(end()), size_in_bytes());
}
void StubCodeDesc::print() const { print_on(tty); }
// Implementation of StubCodeGenerator
StubCodeGenerator::StubCodeGenerator(CodeBuffer* code, bool print_code) {
_masm = new MacroAssembler(code);
_print_code = PrintStubCode || print_code;
}
StubCodeGenerator::~StubCodeGenerator() {
#ifndef PRODUCT
CodeBuffer* cbuf = _masm->code();
CodeBlob* blob = CodeCache::find_blob(cbuf->insts()->start());
if (blob != NULL) {
blob->use_remarks(cbuf->asm_remarks());
blob->use_strings(cbuf->dbg_strings());
}
#endif
}
void StubCodeGenerator::stub_prolog(StubCodeDesc* cdesc) {
// default implementation - do nothing
}
void StubCodeGenerator::stub_epilog(StubCodeDesc* cdesc) {
if (_print_code) {
#ifndef PRODUCT
// Find the assembly code remarks in the outer CodeBuffer.
AsmRemarks* remarks = &_masm->code_section()->outer()->asm_remarks();
#endif
ttyLocker ttyl;
tty->print_cr("- - - [BEGIN] - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -" );
cdesc->print_on(tty);
tty->cr();
Disassembler::decode(cdesc->begin(), cdesc->end(), tty
NOT_PRODUCT(COMMA remarks COMMA cdesc->disp()));
tty->print_cr("- - - [END] - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -" );
tty->cr();
}
}
// Implementation of CodeMark
StubCodeMark::StubCodeMark(StubCodeGenerator* cgen, const char * group, const char * name) {
_cgen = cgen;
_cdesc = new StubCodeDesc(group, name, _cgen->assembler()->pc());
_cgen->stub_prolog(_cdesc);
// define the stub's beginning (= entry point) to be after the prolog:
_cdesc->set_begin(_cgen->assembler()->pc());
}
StubCodeMark::~StubCodeMark() {
_cgen->assembler()->flush();
_cdesc->set_end(_cgen->assembler()->pc());
assert(StubCodeDesc::_list == _cdesc, "expected order on list" );
#ifndef PRODUCT
address base = _cgen->assembler()->code_section()->outer()->insts_begin();
address head = _cdesc->begin();
_cdesc->set_disp(uint(head - base));
#endif
_cgen->stub_epilog(_cdesc);
Forte::register_stub(_cdesc->name(), _cdesc->begin(), _cdesc->end());
if (JvmtiExport::should_post_dynamic_code_generated()) {
JvmtiExport::post_dynamic_code_generated(_cdesc->name(), _cdesc->begin(), _cdesc->end());
}
}
Messung V0.5 in Prozent C=89 H=93 G=90
¤ Dauer der Verarbeitung: 0.3 Sekunden
¤
*© Formatika GbR, Deutschland