jdk8-mips64-public/hotspot: src/share/vm/runtime/stubCodeGenerator.cpp@cd3d6a6b95d9

     1 /*

     2  * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    25 #include "precompiled.hpp"

    26 #include "asm/macroAssembler.hpp"

    27 #include "asm/macroAssembler.inline.hpp"

    28 #include "code/codeCache.hpp"

    29 #include "compiler/disassembler.hpp"

    30 #include "oops/oop.inline.hpp"

    31 #include "prims/forte.hpp"

    32 #include "runtime/stubCodeGenerator.hpp"

    35 // Implementation of StubCodeDesc

    37 StubCodeDesc* StubCodeDesc::_list = NULL;

    38 int           StubCodeDesc::_count = 0;

    41 StubCodeDesc* StubCodeDesc::desc_for(address pc) {

    42   StubCodeDesc* p = _list;

    43   while (p != NULL && !p->contains(pc)) p = p->_next;

    44   // p == NULL || p->contains(pc)

    45   return p;

    46 }

    49 StubCodeDesc* StubCodeDesc::desc_for_index(int index) {

    50   StubCodeDesc* p = _list;

    51   while (p != NULL && p->index() != index) p = p->_next;

    52   return p;

    53 }

    56 const char* StubCodeDesc::name_for(address pc) {

    57   StubCodeDesc* p = desc_for(pc);

    58   return p == NULL ? NULL : p->name();

    59 }

    62 void StubCodeDesc::print_on(outputStream* st) const {

    63   st->print(group());

    64   st->print("::");

    65   st->print(name());

    66   st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT "[ (%d bytes)", begin(), end(), size_in_bytes());

    67 }

    69 // Implementation of StubCodeGenerator

    71 StubCodeGenerator::StubCodeGenerator(CodeBuffer* code, bool print_code) {

    72   _masm = new MacroAssembler(code);

    73   _first_stub = _last_stub = NULL;

    74   _print_code = print_code;

    75 }

    77 extern "C" {

    78   static int compare_cdesc(const void* void_a, const void* void_b) {

    79     int ai = (*((StubCodeDesc**) void_a))->index();

    80     int bi = (*((StubCodeDesc**) void_b))->index();

    81     return ai - bi;

    82   }

    83 }

    85 StubCodeGenerator::~StubCodeGenerator() {

    86   if (PrintStubCode || _print_code) {

    87     CodeBuffer* cbuf = _masm->code();

    88     CodeBlob*   blob = CodeCache::find_blob_unsafe(cbuf->insts()->start());

    89     if (blob != NULL) {

    90       blob->set_comments(cbuf->comments());

    91     }

    92     bool saw_first = false;

    93     StubCodeDesc* toprint[1000];

    94     int toprint_len = 0;

    95     for (StubCodeDesc* cdesc = _last_stub; cdesc != NULL; cdesc = cdesc->_next) {

    96       toprint[toprint_len++] = cdesc;

    97       if (cdesc == _first_stub) { saw_first = true; break; }

    98     }

    99     assert(saw_first, "must get both first & last");

   100     // Print in reverse order:

   101     qsort(toprint, toprint_len, sizeof(toprint[0]), compare_cdesc);

   102     for (int i = 0; i < toprint_len; i++) {

   103       StubCodeDesc* cdesc = toprint[i];

   104       cdesc->print();

   105       tty->cr();

   106       Disassembler::decode(cdesc->begin(), cdesc->end());

   107       tty->cr();

   108     }

   109   }

   110 }

   113 void StubCodeGenerator::stub_prolog(StubCodeDesc* cdesc) {

   114   // default implementation - do nothing

   115 }

   118 void StubCodeGenerator::stub_epilog(StubCodeDesc* cdesc) {

   119   // default implementation - record the cdesc

   120   if (_first_stub == NULL)  _first_stub = cdesc;

   121   _last_stub = cdesc;

   122 }

   125 // Implementation of CodeMark

   127 StubCodeMark::StubCodeMark(StubCodeGenerator* cgen, const char* group, const char* name) {

   128   _cgen  = cgen;

   129   _cdesc = new StubCodeDesc(group, name, _cgen->assembler()->pc());

   130   _cgen->stub_prolog(_cdesc);

   131   // define the stub's beginning (= entry point) to be after the prolog:

   132   _cdesc->set_begin(_cgen->assembler()->pc());

   133 }

   135 StubCodeMark::~StubCodeMark() {

   136   _cgen->assembler()->flush();

   137   _cdesc->set_end(_cgen->assembler()->pc());

   138   assert(StubCodeDesc::_list == _cdesc, "expected order on list");

   139   _cgen->stub_epilog(_cdesc);

   140   Forte::register_stub(_cdesc->name(), _cdesc->begin(), _cdesc->end());

   142   if (JvmtiExport::should_post_dynamic_code_generated()) {

   143     JvmtiExport::post_dynamic_code_generated(_cdesc->name(), _cdesc->begin(), _cdesc->end());

   144   }

   145 }

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