jdk8-mips64-public/hotspot: src/share/vm/runtime/vframe.cpp@c204e2044c29 (annotated)

src/share/vm/runtime/vframe.cpp@c204e2044c29 (annotated)

src/share/vm/runtime/vframe.cpp

Mon, 29 Sep 2014 13:12:48 +0200

author: mgronlun
date: Mon, 29 Sep 2014 13:12:48 +0200
changeset 7215: c204e2044c29
parent 6708: 4a1062dc52d1
child 7535: 7ae4e26cb1e0
child 7605: 6e8e0bf87bbe
permissions: -rw-r--r--

8038624: interpretedVFrame::expressions() must respect InterpreterOopMap for liveness
Reviewed-by: coleenp, minqi

 /*
  * Copyright (c) 1997, 2014, 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 "classfile/javaClasses.hpp"
 #include "classfile/systemDictionary.hpp"
 #include "classfile/vmSymbols.hpp"
 #include "code/codeCache.hpp"
 #include "code/debugInfoRec.hpp"
 #include "code/nmethod.hpp"
 #include "code/pcDesc.hpp"
 #include "code/scopeDesc.hpp"
 #include "interpreter/interpreter.hpp"
 #include "interpreter/oopMapCache.hpp"
 #include "memory/resourceArea.hpp"
 #include "oops/instanceKlass.hpp"
 #include "oops/oop.inline.hpp"
 #include "runtime/handles.inline.hpp"
 #include "runtime/objectMonitor.hpp"
 #include "runtime/objectMonitor.inline.hpp"
 #include "runtime/signature.hpp"
 #include "runtime/stubRoutines.hpp"
 #include "runtime/synchronizer.hpp"
 #include "runtime/vframe.hpp"
 #include "runtime/vframeArray.hpp"
 #include "runtime/vframe_hp.hpp"
 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
 vframe::vframe(const frame* fr, const RegisterMap* reg_map, JavaThread* thread)
 : _reg_map(reg_map), _thread(thread) {
   assert(fr != NULL, "must have frame");
   _fr = *fr;
 }
 vframe::vframe(const frame* fr, JavaThread* thread)
 : _reg_map(thread), _thread(thread) {
   assert(fr != NULL, "must have frame");
   _fr = *fr;
 }
 vframe* vframe::new_vframe(const frame* f, const RegisterMap* reg_map, JavaThread* thread) {
   // Interpreter frame
   if (f->is_interpreted_frame()) {
     return new interpretedVFrame(f, reg_map, thread);
   }
   // Compiled frame
   CodeBlob* cb = f->cb();
   if (cb != NULL) {
     if (cb->is_nmethod()) {
       nmethod* nm = (nmethod*)cb;
       return new compiledVFrame(f, reg_map, thread, nm);
     }
     if (f->is_runtime_frame()) {
       // Skip this frame and try again.
       RegisterMap temp_map = *reg_map;
       frame s = f->sender(&temp_map);
       return new_vframe(&s, &temp_map, thread);
     }
   }
   // External frame
   return new externalVFrame(f, reg_map, thread);
 }
 vframe* vframe::sender() const {
   RegisterMap temp_map = *register_map();
   assert(is_top(), "just checking");
   if (_fr.is_entry_frame() && _fr.is_first_frame()) return NULL;
   frame s = _fr.real_sender(&temp_map);
   if (s.is_first_frame()) return NULL;
   return vframe::new_vframe(&s, &temp_map, thread());
 }
 vframe* vframe::top() const {
   vframe* vf = (vframe*) this;
   while (!vf->is_top()) vf = vf->sender();
   return vf;
 }
 javaVFrame* vframe::java_sender() const {
   vframe* f = sender();
   while (f != NULL) {
     if (f->is_java_frame()) return javaVFrame::cast(f);
     f = f->sender();
   }
   return NULL;
 }
 // ------------- javaVFrame --------------
 GrowableArray<MonitorInfo*>* javaVFrame::locked_monitors() {
   assert(SafepointSynchronize::is_at_safepoint() || JavaThread::current() == thread(),
          "must be at safepoint or it's a java frame of the current thread");
   GrowableArray<MonitorInfo*>* mons = monitors();
   GrowableArray<MonitorInfo*>* result = new GrowableArray<MonitorInfo*>(mons->length());
   if (mons->is_empty()) return result;
   bool found_first_monitor = false;
   ObjectMonitor *pending_monitor = thread()->current_pending_monitor();
   ObjectMonitor *waiting_monitor = thread()->current_waiting_monitor();
   oop pending_obj = (pending_monitor != NULL ? (oop) pending_monitor->object() : (oop) NULL);
   oop waiting_obj = (waiting_monitor != NULL ? (oop) waiting_monitor->object() : (oop) NULL);
   for (int index = (mons->length()-1); index >= 0; index--) {
     MonitorInfo* monitor = mons->at(index);
     if (monitor->eliminated() && is_compiled_frame()) continue; // skip eliminated monitor
     oop obj = monitor->owner();
     if (obj == NULL) continue; // skip unowned monitor
     //
     // Skip the monitor that the thread is blocked to enter or waiting on
     //
     if (!found_first_monitor && (obj == pending_obj || obj == waiting_obj)) {
       continue;
     }
     found_first_monitor = true;
     result->append(monitor);
   }
   return result;
 }
 static void print_locked_object_class_name(outputStream* st, Handle obj, const char* lock_state) {
   if (obj.not_null()) {
     st->print("\t- %s <" INTPTR_FORMAT "> ", lock_state, (address)obj());
     if (obj->klass() == SystemDictionary::Class_klass()) {
       Klass* target_klass = java_lang_Class::as_Klass(obj());
       st->print_cr("(a java.lang.Class for %s)", InstanceKlass::cast(target_klass)->external_name());
     } else {
       Klass* k = obj->klass();
       st->print_cr("(a %s)", k->external_name());
     }
   }
 }
 void javaVFrame::print_lock_info_on(outputStream* st, int frame_count) {
   ResourceMark rm;
   // If this is the first frame, and java.lang.Object.wait(...) then print out the receiver.
   if (frame_count == 0) {
     if (method()->name() == vmSymbols::wait_name() &&
         method()->method_holder()->name() == vmSymbols::java_lang_Object()) {
       StackValueCollection* locs = locals();
       if (!locs->is_empty()) {
         StackValue* sv = locs->at(0);
         if (sv->type() == T_OBJECT) {
           Handle o = locs->at(0)->get_obj();
           print_locked_object_class_name(st, o, "waiting on");
         }
       }
     } else if (thread()->current_park_blocker() != NULL) {
       oop obj = thread()->current_park_blocker();
       Klass* k = obj->klass();
       st->print_cr("\t- %s <" INTPTR_FORMAT "> (a %s)", "parking to wait for ", (address)obj, k->external_name());
     }
   }
   // Print out all monitors that we have locked or are trying to lock
   GrowableArray<MonitorInfo*>* mons = monitors();
   if (!mons->is_empty()) {
     bool found_first_monitor = false;
     for (int index = (mons->length()-1); index >= 0; index--) {
       MonitorInfo* monitor = mons->at(index);
       if (monitor->eliminated() && is_compiled_frame()) { // Eliminated in compiled code
         if (monitor->owner_is_scalar_replaced()) {
           Klass* k = java_lang_Class::as_Klass(monitor->owner_klass());
           st->print("\t- eliminated <owner is scalar replaced> (a %s)", k->external_name());
         } else {
           oop obj = monitor->owner();
           if (obj != NULL) {
             print_locked_object_class_name(st, obj, "eliminated");
           }
         }
         continue;
       }
       if (monitor->owner() != NULL) {
         // the monitor is associated with an object, i.e., it is locked
         // First, assume we have the monitor locked. If we haven't found an
         // owned monitor before and this is the first frame, then we need to
         // see if we have completed the lock or we are blocked trying to
         // acquire it - we can only be blocked if the monitor is inflated
         const char *lock_state = "locked"; // assume we have the monitor locked
         if (!found_first_monitor && frame_count == 0) {
           markOop mark = monitor->owner()->mark();
           if (mark->has_monitor() &&
               ( // we have marked ourself as pending on this monitor
                 mark->monitor() == thread()->current_pending_monitor() ||
                 // we are not the owner of this monitor
                 !mark->monitor()->is_entered(thread())
               )) {
             lock_state = "waiting to lock";
           }
         }
         found_first_monitor = true;
         print_locked_object_class_name(st, monitor->owner(), lock_state);
       }
     }
   }
 }
 // ------------- interpretedVFrame --------------
 u_char* interpretedVFrame::bcp() const {
   return fr().interpreter_frame_bcp();
 }
 void interpretedVFrame::set_bcp(u_char* bcp) {
   fr().interpreter_frame_set_bcp(bcp);
 }
 intptr_t* interpretedVFrame::locals_addr_at(int offset) const {
   assert(fr().is_interpreted_frame(), "frame should be an interpreted frame");
   return fr().interpreter_frame_local_at(offset);
 }
 GrowableArray<MonitorInfo*>* interpretedVFrame::monitors() const {
   GrowableArray<MonitorInfo*>* result = new GrowableArray<MonitorInfo*>(5);
   for (BasicObjectLock* current = (fr().previous_monitor_in_interpreter_frame(fr().interpreter_frame_monitor_begin()));
        current >= fr().interpreter_frame_monitor_end();
        current = fr().previous_monitor_in_interpreter_frame(current)) {
     result->push(new MonitorInfo(current->obj(), current->lock(), false, false));
   }
   return result;
 }
 int interpretedVFrame::bci() const {
   return method()->bci_from(bcp());
 }
 Method* interpretedVFrame::method() const {
   return fr().interpreter_frame_method();
 }
 static StackValue* create_stack_value_from_oop_map(const InterpreterOopMap& oop_mask,
                                                    int index,
                                                    const intptr_t* const addr) {
   assert(index >= 0 &&
          index < oop_mask.number_of_entries(), "invariant");
   // categorize using oop_mask
   if (oop_mask.is_oop(index)) {
     // reference (oop) "r"
     Handle h(addr != NULL ? (*(oop*)addr) : (oop)NULL);
     return new StackValue(h);
   }
   // value (integer) "v"
   return new StackValue(addr != NULL ? *addr : 0);
 }
 static bool is_in_expression_stack(const frame& fr, const intptr_t* const addr) {
   assert(addr != NULL, "invariant");
   // Ensure to be 'inside' the expresion stack (i.e., addr >= sp for Intel).
   // In case of exceptions, the expression stack is invalid and the sp
   // will be reset to express this condition.
   if (frame::interpreter_frame_expression_stack_direction() > 0) {
     return addr <= fr.interpreter_frame_tos_address();
   }
   return addr >= fr.interpreter_frame_tos_address();
 }
 static void stack_locals(StackValueCollection* result,
                          int length,
                          const InterpreterOopMap& oop_mask,
                          const frame& fr) {
   assert(result != NULL, "invariant");
   for (int i = 0; i < length; ++i) {
     const intptr_t* const addr = fr.interpreter_frame_local_at(i);
     assert(addr != NULL, "invariant");
     assert(addr >= fr.sp(), "must be inside the frame");
     StackValue* const sv = create_stack_value_from_oop_map(oop_mask, i, addr);
     assert(sv != NULL, "sanity check");
     result->add(sv);
   }
 }
 static void stack_expressions(StackValueCollection* result,
                               int length,
                               int max_locals,
                               const InterpreterOopMap& oop_mask,
                               const frame& fr) {
   assert(result != NULL, "invariant");
   for (int i = 0; i < length; ++i) {
     const intptr_t* addr = fr.interpreter_frame_expression_stack_at(i);
     assert(addr != NULL, "invariant");
     if (!is_in_expression_stack(fr, addr)) {
       // Need to ensure no bogus escapes.
       addr = NULL;
     }
     StackValue* const sv = create_stack_value_from_oop_map(oop_mask,
                                                            i + max_locals,
                                                            addr);
     assert(sv != NULL, "sanity check");
     result->add(sv);
   }
 }
 StackValueCollection* interpretedVFrame::locals() const {
   return stack_data(false);
 }
 StackValueCollection* interpretedVFrame::expressions() const {
   return stack_data(true);
 }
 /*
  * Worker routine for fetching references and/or values
  * for a particular bci in the interpretedVFrame.
  *
  * Returns data for either "locals" or "expressions",
  * using bci relative oop_map (oop_mask) information.
  *
  * @param expressions  bool switch controlling what data to return
                        (false == locals / true == expressions)
  *
  */
 StackValueCollection* interpretedVFrame::stack_data(bool expressions) const {
   InterpreterOopMap oop_mask;
   // oopmap for current bci
   if (TraceDeoptimization && Verbose) {
     methodHandle m_h(Thread::current(), method());
     OopMapCache::compute_one_oop_map(m_h, bci(), &oop_mask);
   } else {
     method()->mask_for(bci(), &oop_mask);
   }
   const int mask_len = oop_mask.number_of_entries();
   // If the method is native, method()->max_locals() is not telling the truth.
   // For our purposes, max locals instead equals the size of parameters.
   const int max_locals = method()->is_native() ?
     method()->size_of_parameters() : method()->max_locals();
   assert(mask_len >= max_locals, "invariant");
   const int length = expressions ? mask_len - max_locals : max_locals;
   assert(length >= 0, "invariant");
   StackValueCollection* const result = new StackValueCollection(length);
   if (0 == length) {
     return result;
   }
   if (expressions) {
     stack_expressions(result, length, max_locals, oop_mask, fr());
   } else {
     stack_locals(result, length, oop_mask, fr());
   }
   assert(length == result->size(), "invariant");
   return result;
 }
 void interpretedVFrame::set_locals(StackValueCollection* values) const {
   if (values == NULL || values->size() == 0) return;
   // If the method is native, max_locals is not telling the truth.
   // maxlocals then equals the size of parameters
   const int max_locals = method()->is_native() ?
     method()->size_of_parameters() : method()->max_locals();
   assert(max_locals == values->size(), "Mismatch between actual stack format and supplied data");
   // handle locals
   for (int i = 0; i < max_locals; i++) {
     // Find stack location
     intptr_t *addr = locals_addr_at(i);
     // Depending on oop/int put it in the right package
     const StackValue* const sv = values->at(i);
     assert(sv != NULL, "sanity check");
     if (sv->type() == T_OBJECT) {
       *(oop *) addr = (sv->get_obj())();
     } else {                   // integer
       *addr = sv->get_int();
     }
   }
 }
 // ------------- cChunk --------------
 entryVFrame::entryVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread)
 : externalVFrame(fr, reg_map, thread) {}
 void vframeStreamCommon::found_bad_method_frame() {
   // 6379830 Cut point for an assertion that occasionally fires when
   // we are using the performance analyzer.
   // Disable this assert when testing the analyzer with fastdebug.
   // -XX:SuppressErrorAt=vframe.cpp:XXX (XXX=following line number)
   assert(false, "invalid bci or invalid scope desc");
 }
 // top-frame will be skipped
 vframeStream::vframeStream(JavaThread* thread, frame top_frame,
   bool stop_at_java_call_stub) : vframeStreamCommon(thread) {
   _stop_at_java_call_stub = stop_at_java_call_stub;
   // skip top frame, as it may not be at safepoint
   _frame  = top_frame.sender(&_reg_map);
   while (!fill_from_frame()) {
     _frame = _frame.sender(&_reg_map);
   }
 }
 // Step back n frames, skip any pseudo frames in between.
 // This function is used in Class.forName, Class.newInstance, Method.Invoke,
 // AccessController.doPrivileged.
 void vframeStreamCommon::security_get_caller_frame(int depth) {
   assert(depth >= 0, err_msg("invalid depth: %d", depth));
   for (int n = 0; !at_end(); security_next()) {
     if (!method()->is_ignored_by_security_stack_walk()) {
       if (n == depth) {
         // We have reached the desired depth; return.
         return;
       }
       n++;  // this is a non-skipped frame; count it against the depth
     }
   }
   // NOTE: At this point there were not enough frames on the stack
   // to walk to depth.  Callers of this method have to check for at_end.
 }
 void vframeStreamCommon::security_next() {
   if (method()->is_prefixed_native()) {
     skip_prefixed_method_and_wrappers();  // calls next()
   } else {
     next();
   }
 }
 void vframeStreamCommon::skip_prefixed_method_and_wrappers() {
   ResourceMark rm;
   HandleMark hm;
   int    method_prefix_count = 0;
   char** method_prefixes = JvmtiExport::get_all_native_method_prefixes(&method_prefix_count);
   KlassHandle prefixed_klass(method()->method_holder());
   const char* prefixed_name = method()->name()->as_C_string();
   size_t prefixed_name_len = strlen(prefixed_name);
   int prefix_index = method_prefix_count-1;
   while (!at_end()) {
     next();
     if (method()->method_holder() != prefixed_klass()) {
       break; // classes don't match, can't be a wrapper
     }
     const char* name = method()->name()->as_C_string();
     size_t name_len = strlen(name);
     size_t prefix_len = prefixed_name_len - name_len;
     if (prefix_len <= 0 || strcmp(name, prefixed_name + prefix_len) != 0) {
       break; // prefixed name isn't prefixed version of method name, can't be a wrapper
     }
     for (; prefix_index >= 0; --prefix_index) {
       const char* possible_prefix = method_prefixes[prefix_index];
       size_t possible_prefix_len = strlen(possible_prefix);
       if (possible_prefix_len == prefix_len &&
           strncmp(possible_prefix, prefixed_name, prefix_len) == 0) {
         break; // matching prefix found
       }
     }
     if (prefix_index < 0) {
       break; // didn't find the prefix, can't be a wrapper
     }
     prefixed_name = name;
     prefixed_name_len = name_len;
   }
 }
 void vframeStreamCommon::skip_reflection_related_frames() {
   while (!at_end() &&
          (JDK_Version::is_gte_jdk14x_version() && UseNewReflection &&
           (method()->method_holder()->is_subclass_of(SystemDictionary::reflect_MethodAccessorImpl_klass()) ||
            method()->method_holder()->is_subclass_of(SystemDictionary::reflect_ConstructorAccessorImpl_klass())))) {
     next();
   }
 }
 #ifndef PRODUCT
 void vframe::print() {
   if (WizardMode) _fr.print_value_on(tty,NULL);
 }
 void vframe::print_value() const {
   ((vframe*)this)->print();
 }
 void entryVFrame::print_value() const {
   ((entryVFrame*)this)->print();
 }
 void entryVFrame::print() {
   vframe::print();
   tty->print_cr("C Chunk inbetween Java");
   tty->print_cr("C     link " INTPTR_FORMAT, _fr.link());
 }
 // ------------- javaVFrame --------------
 static void print_stack_values(const char* title, StackValueCollection* values) {
   if (values->is_empty()) return;
   tty->print_cr("\t%s:", title);
   values->print();
 }
 void javaVFrame::print() {
   ResourceMark rm;
   vframe::print();
   tty->print("\t");
   method()->print_value();
   tty->cr();
   tty->print_cr("\tbci:    %d", bci());
   print_stack_values("locals",      locals());
   print_stack_values("expressions", expressions());
   GrowableArray<MonitorInfo*>* list = monitors();
   if (list->is_empty()) return;
   tty->print_cr("\tmonitor list:");
   for (int index = (list->length()-1); index >= 0; index--) {
     MonitorInfo* monitor = list->at(index);
     tty->print("\t  obj\t");
     if (monitor->owner_is_scalar_replaced()) {
       Klass* k = java_lang_Class::as_Klass(monitor->owner_klass());
       tty->print("( is scalar replaced %s)", k->external_name());
     } else if (monitor->owner() == NULL) {
       tty->print("( null )");
     } else {
       monitor->owner()->print_value();
       tty->print("(" INTPTR_FORMAT ")", (address)monitor->owner());
     }
     if (monitor->eliminated() && is_compiled_frame())
       tty->print(" ( lock is eliminated )");
     tty->cr();
     tty->print("\t  ");
     monitor->lock()->print_on(tty);
     tty->cr();
   }
 }
 void javaVFrame::print_value() const {
   Method*    m = method();
   InstanceKlass*     k = m->method_holder();
   tty->print_cr("frame( sp=" INTPTR_FORMAT ", unextended_sp=" INTPTR_FORMAT ", fp=" INTPTR_FORMAT ", pc=" INTPTR_FORMAT ")",
                 _fr.sp(),  _fr.unextended_sp(), _fr.fp(), _fr.pc());
   tty->print("%s.%s", k->internal_name(), m->name()->as_C_string());
   if (!m->is_native()) {
     Symbol*  source_name = k->source_file_name();
     int        line_number = m->line_number_from_bci(bci());
     if (source_name != NULL && (line_number != -1)) {
       tty->print("(%s:%d)", source_name->as_C_string(), line_number);
     }
   } else {
     tty->print("(Native Method)");
   }
   // Check frame size and print warning if it looks suspiciously large
   if (fr().sp() != NULL) {
     RegisterMap map = *register_map();
     uint size = fr().frame_size(&map);
 #ifdef _LP64
     if (size > 8*K) warning("SUSPICIOUSLY LARGE FRAME (%d)", size);
 #else
     if (size > 4*K) warning("SUSPICIOUSLY LARGE FRAME (%d)", size);
 #endif
   }
 }
 bool javaVFrame::structural_compare(javaVFrame* other) {
   // Check static part
   if (method() != other->method()) return false;
   if (bci()    != other->bci())    return false;
   // Check locals
   StackValueCollection *locs = locals();
   StackValueCollection *other_locs = other->locals();
   assert(locs->size() == other_locs->size(), "sanity check");
   int i;
   for(i = 0; i < locs->size(); i++) {
     // it might happen the compiler reports a conflict and
     // the interpreter reports a bogus int.
     if (       is_compiled_frame() &&       locs->at(i)->type() == T_CONFLICT) continue;
     if (other->is_compiled_frame() && other_locs->at(i)->type() == T_CONFLICT) continue;
     if (!locs->at(i)->equal(other_locs->at(i)))
       return false;
   }
   // Check expressions
   StackValueCollection* exprs = expressions();
   StackValueCollection* other_exprs = other->expressions();
   assert(exprs->size() == other_exprs->size(), "sanity check");
   for(i = 0; i < exprs->size(); i++) {
     if (!exprs->at(i)->equal(other_exprs->at(i)))
       return false;
   }
   return true;
 }
 void javaVFrame::print_activation(int index) const {
   // frame number and method
   tty->print("%2d - ", index);
   ((vframe*)this)->print_value();
   tty->cr();
   if (WizardMode) {
     ((vframe*)this)->print();
     tty->cr();
   }
 }
 void javaVFrame::verify() const {
 }
 void interpretedVFrame::verify() const {
 }
 // ------------- externalVFrame --------------
 void externalVFrame::print() {
   _fr.print_value_on(tty,NULL);
 }
 void externalVFrame::print_value() const {
   ((vframe*)this)->print();
 }
 #endif // PRODUCT

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/runtime/vframe.cpp@c204e2044c29 (annotated)

src/share/vm/runtime/vframe.cpp