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hotspot/src/share/vm/runtime/stubCodeGenerator.cpp

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+/*
+ * Copyright 1997-2004 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+#include "incls/_precompiled.incl"
+#include "incls/_stubCodeGenerator.cpp.incl"
+
+
+// Implementation of StubCodeDesc
+
+StubCodeDesc* StubCodeDesc::_list = NULL;
+int           StubCodeDesc::_count = 0;
+
+
+StubCodeDesc* StubCodeDesc::desc_for(address pc) {
+  StubCodeDesc* p = _list;
+  while (p != NULL && !p->contains(pc)) p = p->_next;
+  // p == NULL || p->contains(pc)
+  return p;
+}
+
+
+StubCodeDesc* StubCodeDesc::desc_for_index(int index) {
+  StubCodeDesc* p = _list;
+  while (p != NULL && p->index() != index) p = p->_next;
+  return p;
+}
+
+
+const char* StubCodeDesc::name_for(address pc) {
+  StubCodeDesc* p = desc_for(pc);
+  return p == NULL ? NULL : p->name();
+}
+
+
+void StubCodeDesc::print() {
+  tty->print(group());
+  tty->print("::");
+  tty->print(name());
+  tty->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT "[ (%d bytes)", begin(), end(), size_in_bytes());
+}
+
+
+
+// Implementation of StubCodeGenerator
+
+StubCodeGenerator::StubCodeGenerator(CodeBuffer* code) {
+  _masm = new MacroAssembler(code);
+  _first_stub = _last_stub = NULL;
+}
+
+#ifndef PRODUCT
+extern "C" {
+  static int compare_cdesc(const void* void_a, const void* void_b) {
+    int ai = (*((StubCodeDesc**) void_a))->index();
+    int bi = (*((StubCodeDesc**) void_b))->index();
+    return ai - bi;
+  }
+}
+#endif
+
+StubCodeGenerator::~StubCodeGenerator() {
+#ifndef PRODUCT
+  if (PrintStubCode) {
+    CodeBuffer* cbuf = _masm->code();
+    CodeBlob*   blob = CodeCache::find_blob_unsafe(cbuf->insts()->start());
+    if (blob != NULL) {
+      blob->set_comments(cbuf->comments());
+    }
+    bool saw_first = false;
+    StubCodeDesc* toprint[1000];
+    int toprint_len = 0;
+    for (StubCodeDesc* cdesc = _last_stub; cdesc != NULL; cdesc = cdesc->_next) {
+      toprint[toprint_len++] = cdesc;
+      if (cdesc == _first_stub) { saw_first = true; break; }
+    }
+    assert(saw_first, "must get both first & last");
+    // Print in reverse order:
+    qsort(toprint, toprint_len, sizeof(toprint[0]), compare_cdesc);
+    for (int i = 0; i < toprint_len; i++) {
+      StubCodeDesc* cdesc = toprint[i];
+      cdesc->print();
+      tty->cr();
+      Disassembler::decode(cdesc->begin(), cdesc->end());
+      tty->cr();
+    }
+  }
+#endif //PRODUCT
+}
+
+
+void StubCodeGenerator::stub_prolog(StubCodeDesc* cdesc) {
+  // default implementation - do nothing
+}
+
+
+void StubCodeGenerator::stub_epilog(StubCodeDesc* cdesc) {
+  // default implementation - record the cdesc
+  if (_first_stub == NULL)  _first_stub = cdesc;
+  _last_stub = cdesc;
+}
+
+
+// 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");
+  _cgen->stub_epilog(_cdesc);
+  VTune::register_stub(_cdesc->name(), _cdesc->begin(), _cdesc->end());
+  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());
+  }
+}