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

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+/*
+ * Copyright 1997-2006 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/_vframe_hp.cpp.incl"
+
+
+// ------------- compiledVFrame --------------
+
+StackValueCollection* compiledVFrame::locals() const {
+  // Natives has no scope
+  if (scope() == NULL) return new StackValueCollection(0);
+  GrowableArray<ScopeValue*>*  scv_list = scope()->locals();
+  if (scv_list == NULL) return new StackValueCollection(0);
+
+  // scv_list is the list of ScopeValues describing the JVM stack state.
+  // There is one scv_list entry for every JVM stack state in use.
+  int length = scv_list->length();
+  StackValueCollection* result = new StackValueCollection(length);
+  // In rare instances set_locals may have occurred in which case
+  // there are local values that are not described by the ScopeValue anymore
+  GrowableArray<jvmtiDeferredLocalVariable*>* deferred = NULL;
+  GrowableArray<jvmtiDeferredLocalVariableSet*>* list = thread()->deferred_locals();
+  if (list != NULL ) {
+    // In real life this never happens or is typically a single element search
+    for (int i = 0; i < list->length(); i++) {
+      if (list->at(i)->matches((vframe*)this)) {
+        deferred = list->at(i)->locals();
+        break;
+      }
+    }
+  }
+
+  for( int i = 0; i < length; i++ ) {
+    result->add( create_stack_value(scv_list->at(i)) );
+  }
+
+  // Replace specified locals with any deferred writes that are present
+  if (deferred != NULL) {
+    for ( int l = 0;  l < deferred->length() ; l ++) {
+      jvmtiDeferredLocalVariable* val = deferred->at(l);
+      switch (val->type()) {
+      case T_BOOLEAN:
+        result->set_int_at(val->index(), val->value().z);
+        break;
+      case T_CHAR:
+        result->set_int_at(val->index(), val->value().c);
+        break;
+      case T_FLOAT:
+        result->set_float_at(val->index(), val->value().f);
+        break;
+      case T_DOUBLE:
+        result->set_double_at(val->index(), val->value().d);
+        break;
+      case T_BYTE:
+        result->set_int_at(val->index(), val->value().b);
+        break;
+      case T_SHORT:
+        result->set_int_at(val->index(), val->value().s);
+        break;
+      case T_INT:
+        result->set_int_at(val->index(), val->value().i);
+        break;
+      case T_LONG:
+        result->set_long_at(val->index(), val->value().j);
+        break;
+      case T_OBJECT:
+        {
+          Handle obj((oop)val->value().l);
+          result->set_obj_at(val->index(), obj);
+        }
+        break;
+      default:
+        ShouldNotReachHere();
+      }
+    }
+  }
+
+  return result;
+}
+
+
+void compiledVFrame::set_locals(StackValueCollection* values) const {
+
+  fatal("Should use update_local for each local update");
+}
+
+void compiledVFrame::update_local(BasicType type, int index, jvalue value) {
+
+#ifdef ASSERT
+
+  assert(fr().is_deoptimized_frame(), "frame must be scheduled for deoptimization");
+#endif /* ASSERT */
+  GrowableArray<jvmtiDeferredLocalVariableSet*>* deferred = thread()->deferred_locals();
+  if (deferred != NULL ) {
+    // See if this vframe has already had locals with deferred writes
+    int f;
+    for ( f = 0 ; f < deferred->length() ; f++ ) {
+      if (deferred->at(f)->matches(this)) {
+        // Matching, vframe now see if the local already had deferred write
+        GrowableArray<jvmtiDeferredLocalVariable*>* locals = deferred->at(f)->locals();
+        int l;
+        for (l = 0 ; l < locals->length() ; l++ ) {
+          if (locals->at(l)->index() == index) {
+            locals->at(l)->set_value(value);
+            return;
+          }
+        }
+        // No matching local already present. Push a new value onto the deferred collection
+        locals->push(new jvmtiDeferredLocalVariable(index, type, value));
+        return;
+      }
+    }
+    // No matching vframe must push a new vframe
+  } else {
+    // No deferred updates pending for this thread.
+    // allocate in C heap
+    deferred =  new(ResourceObj::C_HEAP) GrowableArray<jvmtiDeferredLocalVariableSet*> (1, true);
+    thread()->set_deferred_locals(deferred);
+  }
+  deferred->push(new jvmtiDeferredLocalVariableSet(method(), bci(), fr().id()));
+  assert(deferred->top()->id() == fr().id(), "Huh? Must match");
+  deferred->top()->set_local_at(index, type, value);
+}
+
+StackValueCollection* compiledVFrame::expressions() const {
+  // Natives has no scope
+  if (scope() == NULL) return new StackValueCollection(0);
+  GrowableArray<ScopeValue*>*  scv_list = scope()->expressions();
+  if (scv_list == NULL) return new StackValueCollection(0);
+
+  // scv_list is the list of ScopeValues describing the JVM stack state.
+  // There is one scv_list entry for every JVM stack state in use.
+  int length = scv_list->length();
+  StackValueCollection* result = new StackValueCollection(length);
+  for( int i = 0; i < length; i++ )
+    result->add( create_stack_value(scv_list->at(i)) );
+
+  return result;
+}
+
+
+// The implementation of the following two methods was factorized into the
+// class StackValue because it is also used from within deoptimization.cpp for
+// rematerialization and relocking of non-escaping objects.
+
+StackValue *compiledVFrame::create_stack_value(ScopeValue *sv) const {
+  return StackValue::create_stack_value(&_fr, register_map(), sv);
+}
+
+BasicLock* compiledVFrame::resolve_monitor_lock(Location location) const {
+  return StackValue::resolve_monitor_lock(&_fr, location);
+}
+
+
+GrowableArray<MonitorInfo*>* compiledVFrame::monitors() const {
+  // Natives has no scope
+  if (scope() == NULL) {
+    nmethod* nm = code();
+    methodOop method = nm->method();
+    assert(method->is_native(), "");
+    if (!method->is_synchronized()) {
+      return new GrowableArray<MonitorInfo*>(0);
+    }
+    // This monitor is really only needed for UseBiasedLocking, but
+    // return it in all cases for now as it might be useful for stack
+    // traces and tools as well
+    GrowableArray<MonitorInfo*> *monitors = new GrowableArray<MonitorInfo*>(1);
+    // Casting away const
+    frame& fr = (frame&) _fr;
+    MonitorInfo* info = new MonitorInfo(fr.compiled_synchronized_native_monitor_owner(nm),
+                                        fr.compiled_synchronized_native_monitor(nm));
+    monitors->push(info);
+    return monitors;
+  }
+  GrowableArray<MonitorValue*>* monitors = scope()->monitors();
+  if (monitors == NULL) {
+    return new GrowableArray<MonitorInfo*>(0);
+  }
+  GrowableArray<MonitorInfo*>* result = new GrowableArray<MonitorInfo*>(monitors->length());
+  for (int index = 0; index < monitors->length(); index++) {
+    MonitorValue* mv = monitors->at(index);
+    StackValue *owner_sv = create_stack_value(mv->owner()); // it is an oop
+    result->push(new MonitorInfo(owner_sv->get_obj()(), resolve_monitor_lock(mv->basic_lock())));
+  }
+  return result;
+}
+
+
+compiledVFrame::compiledVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread, nmethod* nm)
+: javaVFrame(fr, reg_map, thread) {
+  _scope  = NULL;
+  // Compiled method (native stub or Java code)
+  // native wrappers have no scope data, it is implied
+  if (!nm->is_native_method()) {
+    _scope  = nm->scope_desc_at(_fr.pc());
+  }
+}
+
+compiledVFrame::compiledVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread, ScopeDesc* scope)
+: javaVFrame(fr, reg_map, thread) {
+  _scope  = scope;
+  guarantee(_scope != NULL, "scope must be present");
+}
+
+
+bool compiledVFrame::is_top() const {
+  // FIX IT: Remove this when new native stubs are in place
+  if (scope() == NULL) return true;
+  return scope()->is_top();
+}
+
+
+nmethod* compiledVFrame::code() const {
+  return CodeCache::find_nmethod(_fr.pc());
+}
+
+
+methodOop compiledVFrame::method() const {
+  if (scope() == NULL) {
+    // native nmethods have no scope the method is implied
+    nmethod* nm = code();
+    assert(nm->is_native_method(), "must be native");
+    return nm->method();
+  }
+  return scope()->method()();
+}
+
+
+int compiledVFrame::bci() const {
+  int raw = raw_bci();
+  return raw == SynchronizationEntryBCI ? 0 : raw;
+}
+
+
+int compiledVFrame::raw_bci() const {
+  if (scope() == NULL) {
+    // native nmethods have no scope the method/bci is implied
+    nmethod* nm = code();
+    assert(nm->is_native_method(), "must be native");
+    return 0;
+  }
+  return scope()->bci();
+}
+
+
+vframe* compiledVFrame::sender() const {
+  const frame f = fr();
+  if (scope() == NULL) {
+    // native nmethods have no scope the method/bci is implied
+    nmethod* nm = code();
+    assert(nm->is_native_method(), "must be native");
+    return vframe::sender();
+  } else {
+    return scope()->is_top()
+      ? vframe::sender()
+      : new compiledVFrame(&f, register_map(), thread(), scope()->sender());
+  }
+}
+
+jvmtiDeferredLocalVariableSet::jvmtiDeferredLocalVariableSet(methodOop method, int bci, intptr_t* id) {
+  _method = method;
+  _bci = bci;
+  _id = id;
+  // Alway will need at least one, must be on C heap
+  _locals = new(ResourceObj::C_HEAP) GrowableArray<jvmtiDeferredLocalVariable*> (1, true);
+}
+
+jvmtiDeferredLocalVariableSet::~jvmtiDeferredLocalVariableSet() {
+  for (int i = 0; i < _locals->length() ; i++ ) {
+    delete _locals->at(i);
+  }
+  // Free growableArray and c heap for elements
+  delete _locals;
+}
+
+bool jvmtiDeferredLocalVariableSet::matches(vframe* vf) {
+  if (!vf->is_compiled_frame()) return false;
+  compiledVFrame* cvf = (compiledVFrame*)vf;
+  return cvf->fr().id() == id() && cvf->method() == method() && cvf->bci() == bci();
+}
+
+void jvmtiDeferredLocalVariableSet::set_local_at(int idx, BasicType type, jvalue val) {
+  int i;
+  for ( i = 0 ; i < locals()->length() ; i++ ) {
+    if ( locals()->at(i)->index() == idx) {
+      assert(locals()->at(i)->type() == type, "Wrong type");
+      locals()->at(i)->set_value(val);
+      return;
+    }
+  }
+  locals()->push(new jvmtiDeferredLocalVariable(idx, type, val));
+}
+
+void jvmtiDeferredLocalVariableSet::oops_do(OopClosure* f) {
+
+  f->do_oop((oop*) &_method);
+  for ( int i = 0; i < locals()->length(); i++ ) {
+    if ( locals()->at(i)->type() == T_OBJECT) {
+      f->do_oop(locals()->at(i)->oop_addr());
+    }
+  }
+}
+
+jvmtiDeferredLocalVariable::jvmtiDeferredLocalVariable(int index, BasicType type, jvalue value) {
+  _index = index;
+  _type = type;
+  _value = value;
+}
+
+
+#ifndef PRODUCT
+void compiledVFrame::verify() const {
+  Unimplemented();
+}
+#endif // PRODUCT