jdk8-mips64-public/hotspot: src/share/vm/runtime/frame.cpp@8e875c964f41 (annotated)

src/share/vm/runtime/frame.cpp@8e875c964f41 (annotated)

src/share/vm/runtime/frame.cpp

Wed, 09 Oct 2019 16:11:58 +0800

author: ddong
date: Wed, 09 Oct 2019 16:11:58 +0800
changeset 9885: 8e875c964f41
parent 9858: b985cbb00e68
child 9931: fd44df5e3bc3
permissions: -rw-r--r--

8214542: JFR: Old Object Sample event slow on a deep heap in debug builds
Reviewed-by: egahlin, rwestberg

 /*
  * 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 "compiler/abstractCompiler.hpp"
 #include "compiler/disassembler.hpp"
 #include "gc_interface/collectedHeap.inline.hpp"
 #include "interpreter/interpreter.hpp"
 #include "interpreter/oopMapCache.hpp"
 #include "memory/resourceArea.hpp"
 #include "memory/universe.inline.hpp"
 #include "oops/markOop.hpp"
 #include "oops/methodData.hpp"
 #include "oops/method.hpp"
 #include "oops/oop.inline.hpp"
 #include "oops/oop.inline2.hpp"
 #include "prims/methodHandles.hpp"
 #include "runtime/frame.inline.hpp"
 #include "runtime/handles.inline.hpp"
 #include "runtime/javaCalls.hpp"
 #include "runtime/monitorChunk.hpp"
 #include "runtime/sharedRuntime.hpp"
 #include "runtime/signature.hpp"
 #include "runtime/stubCodeGenerator.hpp"
 #include "runtime/stubRoutines.hpp"
 #include "utilities/decoder.hpp"
 #ifdef TARGET_ARCH_x86
 # include "nativeInst_x86.hpp"
 #endif
 #ifdef TARGET_ARCH_sparc
 # include "nativeInst_sparc.hpp"
 #endif
 #ifdef TARGET_ARCH_zero
 # include "nativeInst_zero.hpp"
 #endif
 #ifdef TARGET_ARCH_arm
 # include "nativeInst_arm.hpp"
 #endif
 #ifdef TARGET_ARCH_ppc
 # include "nativeInst_ppc.hpp"
 #endif
 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
 RegisterMap::RegisterMap(JavaThread *thread, bool update_map) {
   _thread         = thread;
   _update_map     = update_map;
   clear();
   debug_only(_update_for_id = NULL;)
 #ifndef PRODUCT
   for (int i = 0; i < reg_count ; i++ ) _location[i] = NULL;
 #endif /* PRODUCT */
 }
 RegisterMap::RegisterMap(const RegisterMap* map) {
   assert(map != this, "bad initialization parameter");
   assert(map != NULL, "RegisterMap must be present");
   _thread                = map->thread();
   _update_map            = map->update_map();
   _include_argument_oops = map->include_argument_oops();
   debug_only(_update_for_id = map->_update_for_id;)
   pd_initialize_from(map);
   if (update_map()) {
     for(int i = 0; i < location_valid_size; i++) {
       LocationValidType bits = !update_map() ? 0 : map->_location_valid[i];
       _location_valid[i] = bits;
       // for whichever bits are set, pull in the corresponding map->_location
       int j = i*location_valid_type_size;
       while (bits != 0) {
         if ((bits & 1) != 0) {
           assert(0 <= j && j < reg_count, "range check");
           _location[j] = map->_location[j];
         }
         bits >>= 1;
         j += 1;
       }
     }
   }
 }
 void RegisterMap::clear() {
   set_include_argument_oops(true);
   if (_update_map) {
     for(int i = 0; i < location_valid_size; i++) {
       _location_valid[i] = 0;
     }
     pd_clear();
   } else {
     pd_initialize();
   }
 }
 #ifndef PRODUCT
 void RegisterMap::print_on(outputStream* st) const {
   st->print_cr("Register map");
   for(int i = 0; i < reg_count; i++) {
     VMReg r = VMRegImpl::as_VMReg(i);
     intptr_t* src = (intptr_t*) location(r);
     if (src != NULL) {
       r->print_on(st);
       st->print(" [" INTPTR_FORMAT "] = ", src);
       if (((uintptr_t)src & (sizeof(*src)-1)) != 0) {
         st->print_cr("<misaligned>");
       } else {
         st->print_cr(INTPTR_FORMAT, *src);
       }
     }
   }
 }
 void RegisterMap::print() const {
   print_on(tty);
 }
 #endif
 // This returns the pc that if you were in the debugger you'd see. Not
 // the idealized value in the frame object. This undoes the magic conversion
 // that happens for deoptimized frames. In addition it makes the value the
 // hardware would want to see in the native frame. The only user (at this point)
 // is deoptimization. It likely no one else should ever use it.
 address frame::raw_pc() const {
   if (is_deoptimized_frame()) {
     nmethod* nm = cb()->as_nmethod_or_null();
     if (nm->is_method_handle_return(pc()))
       return nm->deopt_mh_handler_begin() - pc_return_offset;
     else
       return nm->deopt_handler_begin() - pc_return_offset;
   } else {
     return (pc() - pc_return_offset);
   }
 }
 // Change the pc in a frame object. This does not change the actual pc in
 // actual frame. To do that use patch_pc.
 //
 void frame::set_pc(address   newpc ) {
 #ifdef ASSERT
   if (_cb != NULL && _cb->is_nmethod()) {
     assert(!((nmethod*)_cb)->is_deopt_pc(_pc), "invariant violation");
   }
 #endif // ASSERT
   // Unsafe to use the is_deoptimzed tester after changing pc
   _deopt_state = unknown;
   _pc = newpc;
   _cb = CodeCache::find_blob_unsafe(_pc);
 }
 // type testers
 bool frame::is_ignored_frame() const {
   return false;  // FIXME: some LambdaForm frames should be ignored
 }
 bool frame::is_deoptimized_frame() const {
   assert(_deopt_state != unknown, "not answerable");
   return _deopt_state == is_deoptimized;
 }
 bool frame::is_native_frame() const {
   return (_cb != NULL &&
           _cb->is_nmethod() &&
           ((nmethod*)_cb)->is_native_method());
 }
 bool frame::is_java_frame() const {
   if (is_interpreted_frame()) return true;
   if (is_compiled_frame())    return true;
   return false;
 }
 bool frame::is_compiled_frame() const {
   if (_cb != NULL &&
       _cb->is_nmethod() &&
       ((nmethod*)_cb)->is_java_method()) {
     return true;
   }
   return false;
 }
 bool frame::is_runtime_frame() const {
   return (_cb != NULL && _cb->is_runtime_stub());
 }
 bool frame::is_safepoint_blob_frame() const {
   return (_cb != NULL && _cb->is_safepoint_stub());
 }
 // testers
 bool frame::is_first_java_frame() const {
   RegisterMap map(JavaThread::current(), false); // No update
   frame s;
   for (s = sender(&map); !(s.is_java_frame() || s.is_first_frame()); s = s.sender(&map));
   return s.is_first_frame();
 }
 bool frame::entry_frame_is_first() const {
   return entry_frame_call_wrapper()->is_first_frame();
 }
 JavaCallWrapper* frame::entry_frame_call_wrapper_if_safe(JavaThread* thread) const {
   JavaCallWrapper** jcw = entry_frame_call_wrapper_addr();
   address addr = (address) jcw;
   // addr must be within the usable part of the stack
   if (thread->is_in_usable_stack(addr)) {
     return *jcw;
   }
   return NULL;
 }
 bool frame::is_entry_frame_valid(JavaThread* thread) const {
   // Validate the JavaCallWrapper an entry frame must have
   address jcw = (address)entry_frame_call_wrapper();
   bool jcw_safe = (jcw < thread->stack_base()) && (jcw > (address)fp()); // less than stack base
   if (!jcw_safe) {
     return false;
   }
   // Validate sp saved in the java frame anchor
   JavaFrameAnchor* jfa = entry_frame_call_wrapper()->anchor();
   return (jfa->last_Java_sp() > sp());
 }
 bool frame::should_be_deoptimized() const {
   if (_deopt_state == is_deoptimized ||
       !is_compiled_frame() ) return false;
   assert(_cb != NULL && _cb->is_nmethod(), "must be an nmethod");
   nmethod* nm = (nmethod *)_cb;
   if (TraceDependencies) {
     tty->print("checking (%s) ", nm->is_marked_for_deoptimization() ? "true" : "false");
     nm->print_value_on(tty);
     tty->cr();
   }
   if( !nm->is_marked_for_deoptimization() )
     return false;
   // If at the return point, then the frame has already been popped, and
   // only the return needs to be executed. Don't deoptimize here.
   return !nm->is_at_poll_return(pc());
 }
 bool frame::can_be_deoptimized() const {
   if (!is_compiled_frame()) return false;
   nmethod* nm = (nmethod*)_cb;
   if( !nm->can_be_deoptimized() )
     return false;
   return !nm->is_at_poll_return(pc());
 }
 void frame::deoptimize(JavaThread* thread) {
   // Schedule deoptimization of an nmethod activation with this frame.
   assert(_cb != NULL && _cb->is_nmethod(), "must be");
   nmethod* nm = (nmethod*)_cb;
   // This is a fix for register window patching race
   if (NeedsDeoptSuspend && Thread::current() != thread) {
     assert(SafepointSynchronize::is_at_safepoint(),
            "patching other threads for deopt may only occur at a safepoint");
     // It is possible especially with DeoptimizeALot/DeoptimizeRandom that
     // we could see the frame again and ask for it to be deoptimized since
     // it might move for a long time. That is harmless and we just ignore it.
     if (id() == thread->must_deopt_id()) {
       assert(thread->is_deopt_suspend(), "lost suspension");
       return;
     }
     // We are at a safepoint so the target thread can only be
     // in 4 states:
     //     blocked - no problem
     //     blocked_trans - no problem (i.e. could have woken up from blocked
     //                                 during a safepoint).
     //     native - register window pc patching race
     //     native_trans - momentary state
     //
     // We could just wait out a thread in native_trans to block.
     // Then we'd have all the issues that the safepoint code has as to
     // whether to spin or block. It isn't worth it. Just treat it like
     // native and be done with it.
     //
     // Examine the state of the thread at the start of safepoint since
     // threads that were in native at the start of the safepoint could
     // come to a halt during the safepoint, changing the current value
     // of the safepoint_state.
     JavaThreadState state = thread->safepoint_state()->orig_thread_state();
     if (state == _thread_in_native || state == _thread_in_native_trans) {
       // Since we are at a safepoint the target thread will stop itself
       // before it can return to java as long as we remain at the safepoint.
       // Therefore we can put an additional request for the thread to stop
       // no matter what no (like a suspend). This will cause the thread
       // to notice it needs to do the deopt on its own once it leaves native.
       //
       // The only reason we must do this is because on machine with register
       // windows we have a race with patching the return address and the
       // window coming live as the thread returns to the Java code (but still
       // in native mode) and then blocks. It is only this top most frame
       // that is at risk. So in truth we could add an additional check to
       // see if this frame is one that is at risk.
       RegisterMap map(thread, false);
       frame at_risk =  thread->last_frame().sender(&map);
       if (id() == at_risk.id()) {
         thread->set_must_deopt_id(id());
         thread->set_deopt_suspend();
         return;
       }
     }
   } // NeedsDeoptSuspend
   // If the call site is a MethodHandle call site use the MH deopt
   // handler.
   address deopt = nm->is_method_handle_return(pc()) ?
     nm->deopt_mh_handler_begin() :
     nm->deopt_handler_begin();
   // Save the original pc before we patch in the new one
   nm->set_original_pc(this, pc());
   patch_pc(thread, deopt);
 #ifdef ASSERT
   {
     RegisterMap map(thread, false);
     frame check = thread->last_frame();
     while (id() != check.id()) {
       check = check.sender(&map);
     }
     assert(check.is_deoptimized_frame(), "missed deopt");
   }
 #endif // ASSERT
 }
 frame frame::java_sender() const {
   RegisterMap map(JavaThread::current(), false);
   frame s;
   for (s = sender(&map); !(s.is_java_frame() || s.is_first_frame()); s = s.sender(&map)) ;
   guarantee(s.is_java_frame(), "tried to get caller of first java frame");
   return s;
 }
 frame frame::real_sender(RegisterMap* map) const {
   frame result = sender(map);
   while (result.is_runtime_frame() ||
          result.is_ignored_frame()) {
     result = result.sender(map);
   }
   return result;
 }
 // Note: called by profiler - NOT for current thread
 frame frame::profile_find_Java_sender_frame(JavaThread *thread) {
 // If we don't recognize this frame, walk back up the stack until we do
   RegisterMap map(thread, false);
   frame first_java_frame = frame();
   // Find the first Java frame on the stack starting with input frame
   if (is_java_frame()) {
     // top frame is compiled frame or deoptimized frame
     first_java_frame = *this;
   } else if (safe_for_sender(thread)) {
     for (frame sender_frame = sender(&map);
       sender_frame.safe_for_sender(thread) && !sender_frame.is_first_frame();
       sender_frame = sender_frame.sender(&map)) {
       if (sender_frame.is_java_frame()) {
         first_java_frame = sender_frame;
         break;
       }
     }
   }
   return first_java_frame;
 }
 // Interpreter frames
 void frame::interpreter_frame_set_locals(intptr_t* locs)  {
   assert(is_interpreted_frame(), "Not an interpreted frame");
   *interpreter_frame_locals_addr() = locs;
 }
 Method* frame::interpreter_frame_method() const {
   assert(is_interpreted_frame(), "interpreted frame expected");
   Method* m = *interpreter_frame_method_addr();
   assert(m->is_method(), "not a Method*");
   return m;
 }
 void frame::interpreter_frame_set_method(Method* method) {
   assert(is_interpreted_frame(), "interpreted frame expected");
   *interpreter_frame_method_addr() = method;
 }
 void frame::interpreter_frame_set_bcx(intptr_t bcx) {
   assert(is_interpreted_frame(), "Not an interpreted frame");
   if (ProfileInterpreter) {
     bool formerly_bci = is_bci(interpreter_frame_bcx());
     bool is_now_bci = is_bci(bcx);
     *interpreter_frame_bcx_addr() = bcx;
     intptr_t mdx = interpreter_frame_mdx();
     if (mdx != 0) {
       if (formerly_bci) {
         if (!is_now_bci) {
           // The bcx was just converted from bci to bcp.
           // Convert the mdx in parallel.
           MethodData* mdo = interpreter_frame_method()->method_data();
           assert(mdo != NULL, "");
           int mdi = mdx - 1; // We distinguish valid mdi from zero by adding one.
           address mdp = mdo->di_to_dp(mdi);
           interpreter_frame_set_mdx((intptr_t)mdp);
         }
       } else {
         if (is_now_bci) {
           // The bcx was just converted from bcp to bci.
           // Convert the mdx in parallel.
           MethodData* mdo = interpreter_frame_method()->method_data();
           assert(mdo != NULL, "");
           int mdi = mdo->dp_to_di((address)mdx);
           interpreter_frame_set_mdx((intptr_t)mdi + 1); // distinguish valid from 0.
         }
       }
     }
   } else {
     *interpreter_frame_bcx_addr() = bcx;
   }
 }
 jint frame::interpreter_frame_bci() const {
   assert(is_interpreted_frame(), "interpreted frame expected");
   intptr_t bcx = interpreter_frame_bcx();
   return is_bci(bcx) ? bcx : interpreter_frame_method()->bci_from((address)bcx);
 }
 void frame::interpreter_frame_set_bci(jint bci) {
   assert(is_interpreted_frame(), "interpreted frame expected");
   assert(!is_bci(interpreter_frame_bcx()), "should not set bci during GC");
   interpreter_frame_set_bcx((intptr_t)interpreter_frame_method()->bcp_from(bci));
 }
 address frame::interpreter_frame_bcp() const {
   assert(is_interpreted_frame(), "interpreted frame expected");
   intptr_t bcx = interpreter_frame_bcx();
   return is_bci(bcx) ? interpreter_frame_method()->bcp_from(bcx) : (address)bcx;
 }
 void frame::interpreter_frame_set_bcp(address bcp) {
   assert(is_interpreted_frame(), "interpreted frame expected");
   assert(!is_bci(interpreter_frame_bcx()), "should not set bcp during GC");
   interpreter_frame_set_bcx((intptr_t)bcp);
 }
 void frame::interpreter_frame_set_mdx(intptr_t mdx) {
   assert(is_interpreted_frame(), "Not an interpreted frame");
   assert(ProfileInterpreter, "must be profiling interpreter");
   *interpreter_frame_mdx_addr() = mdx;
 }
 address frame::interpreter_frame_mdp() const {
   assert(ProfileInterpreter, "must be profiling interpreter");
   assert(is_interpreted_frame(), "interpreted frame expected");
   intptr_t bcx = interpreter_frame_bcx();
   intptr_t mdx = interpreter_frame_mdx();
   assert(!is_bci(bcx), "should not access mdp during GC");
   return (address)mdx;
 }
 void frame::interpreter_frame_set_mdp(address mdp) {
   assert(is_interpreted_frame(), "interpreted frame expected");
   if (mdp == NULL) {
     // Always allow the mdp to be cleared.
     interpreter_frame_set_mdx((intptr_t)mdp);
   }
   intptr_t bcx = interpreter_frame_bcx();
   assert(!is_bci(bcx), "should not set mdp during GC");
   interpreter_frame_set_mdx((intptr_t)mdp);
 }
 BasicObjectLock* frame::next_monitor_in_interpreter_frame(BasicObjectLock* current) const {
   assert(is_interpreted_frame(), "Not an interpreted frame");
 #ifdef ASSERT
   interpreter_frame_verify_monitor(current);
 #endif
   BasicObjectLock* next = (BasicObjectLock*) (((intptr_t*) current) + interpreter_frame_monitor_size());
   return next;
 }
 BasicObjectLock* frame::previous_monitor_in_interpreter_frame(BasicObjectLock* current) const {
   assert(is_interpreted_frame(), "Not an interpreted frame");
 #ifdef ASSERT
 //   // This verification needs to be checked before being enabled
 //   interpreter_frame_verify_monitor(current);
 #endif
   BasicObjectLock* previous = (BasicObjectLock*) (((intptr_t*) current) - interpreter_frame_monitor_size());
   return previous;
 }
 // Interpreter locals and expression stack locations.
 intptr_t* frame::interpreter_frame_local_at(int index) const {
   const int n = Interpreter::local_offset_in_bytes(index)/wordSize;
   return &((*interpreter_frame_locals_addr())[n]);
 }
 intptr_t* frame::interpreter_frame_expression_stack_at(jint offset) const {
   const int i = offset * interpreter_frame_expression_stack_direction();
   const int n = i * Interpreter::stackElementWords;
   return &(interpreter_frame_expression_stack()[n]);
 }
 jint frame::interpreter_frame_expression_stack_size() const {
   // Number of elements on the interpreter expression stack
   // Callers should span by stackElementWords
   int element_size = Interpreter::stackElementWords;
   size_t stack_size = 0;
   if (frame::interpreter_frame_expression_stack_direction() < 0) {
     stack_size = (interpreter_frame_expression_stack() -
                   interpreter_frame_tos_address() + 1)/element_size;
   } else {
     stack_size = (interpreter_frame_tos_address() -
                   interpreter_frame_expression_stack() + 1)/element_size;
   }
   assert( stack_size <= (size_t)max_jint, "stack size too big");
   return ((jint)stack_size);
 }
 // (frame::interpreter_frame_sender_sp accessor is in frame_<arch>.cpp)
 const char* frame::print_name() const {
   if (is_native_frame())      return "Native";
   if (is_interpreted_frame()) return "Interpreted";
   if (is_compiled_frame()) {
     if (is_deoptimized_frame()) return "Deoptimized";
     return "Compiled";
   }
   if (sp() == NULL)            return "Empty";
   return "C";
 }
 void frame::print_value_on(outputStream* st, JavaThread *thread) const {
   NOT_PRODUCT(address begin = pc()-40;)
   NOT_PRODUCT(address end   = NULL;)
   st->print("%s frame (sp=" INTPTR_FORMAT " unextended sp=" INTPTR_FORMAT, print_name(), sp(), unextended_sp());
   if (sp() != NULL)
     st->print(", fp=" INTPTR_FORMAT ", real_fp=" INTPTR_FORMAT ", pc=" INTPTR_FORMAT, fp(), real_fp(), pc());
   if (StubRoutines::contains(pc())) {
     st->print_cr(")");
     st->print("(");
     StubCodeDesc* desc = StubCodeDesc::desc_for(pc());
     st->print("~Stub::%s", desc->name());
     NOT_PRODUCT(begin = desc->begin(); end = desc->end();)
   } else if (Interpreter::contains(pc())) {
     st->print_cr(")");
     st->print("(");
     InterpreterCodelet* desc = Interpreter::codelet_containing(pc());
     if (desc != NULL) {
       st->print("~");
       desc->print_on(st);
       NOT_PRODUCT(begin = desc->code_begin(); end = desc->code_end();)
     } else {
       st->print("~interpreter");
     }
   }
   st->print_cr(")");
   if (_cb != NULL) {
     st->print("     ");
     _cb->print_value_on(st);
     st->cr();
 #ifndef PRODUCT
     if (end == NULL) {
       begin = _cb->code_begin();
       end   = _cb->code_end();
     }
 #endif
   }
   NOT_PRODUCT(if (WizardMode && Verbose) Disassembler::decode(begin, end);)
 }
 void frame::print_on(outputStream* st) const {
   print_value_on(st,NULL);
   if (is_interpreted_frame()) {
     interpreter_frame_print_on(st);
   }
 }
 void frame::interpreter_frame_print_on(outputStream* st) const {
 #ifndef PRODUCT
   assert(is_interpreted_frame(), "Not an interpreted frame");
   jint i;
   for (i = 0; i < interpreter_frame_method()->max_locals(); i++ ) {
     intptr_t x = *interpreter_frame_local_at(i);
     st->print(" - local  [" INTPTR_FORMAT "]", x);
     st->fill_to(23);
     st->print_cr("; #%d", i);
   }
   for (i = interpreter_frame_expression_stack_size() - 1; i >= 0; --i ) {
     intptr_t x = *interpreter_frame_expression_stack_at(i);
     st->print(" - stack  [" INTPTR_FORMAT "]", x);
     st->fill_to(23);
     st->print_cr("; #%d", i);
   }
   // locks for synchronization
   for (BasicObjectLock* current = interpreter_frame_monitor_end();
        current < interpreter_frame_monitor_begin();
        current = next_monitor_in_interpreter_frame(current)) {
     st->print(" - obj    [");
     current->obj()->print_value_on(st);
     st->print_cr("]");
     st->print(" - lock   [");
     current->lock()->print_on(st);
     st->print_cr("]");
   }
   // monitor
   st->print_cr(" - monitor[" INTPTR_FORMAT "]", interpreter_frame_monitor_begin());
   // bcp
   st->print(" - bcp    [" INTPTR_FORMAT "]", interpreter_frame_bcp());
   st->fill_to(23);
   st->print_cr("; @%d", interpreter_frame_bci());
   // locals
   st->print_cr(" - locals [" INTPTR_FORMAT "]", interpreter_frame_local_at(0));
   // method
   st->print(" - method [" INTPTR_FORMAT "]", (address)interpreter_frame_method());
   st->fill_to(23);
   st->print("; ");
   interpreter_frame_method()->print_name(st);
   st->cr();
 #endif
 }
 // Return whether the frame is in the VM or os indicating a Hotspot problem.
 // Otherwise, it's likely a bug in the native library that the Java code calls,
 // hopefully indicating where to submit bugs.
 void frame::print_C_frame(outputStream* st, char* buf, int buflen, address pc) {
   // C/C++ frame
   bool in_vm = os::address_is_in_vm(pc);
   st->print(in_vm ? "V" : "C");
   int offset;
   bool found;
   // libname
   found = os::dll_address_to_library_name(pc, buf, buflen, &offset);
   if (found) {
     // skip directory names
     const char *p1, *p2;
     p1 = buf;
     int len = (int)strlen(os::file_separator());
     while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len;
     st->print("  [%s+0x%x]", p1, offset);
   } else {
     st->print("  " PTR_FORMAT, pc);
   }
   // function name - os::dll_address_to_function_name() may return confusing
   // names if pc is within jvm.dll or libjvm.so, because JVM only has
   // JVM_xxxx and a few other symbols in the dynamic symbol table. Do this
   // only for native libraries.
   if (!in_vm || Decoder::can_decode_C_frame_in_vm()) {
     found = os::dll_address_to_function_name(pc, buf, buflen, &offset);
     if (found) {
       st->print("  %s+0x%x", buf, offset);
     }
   }
 }
 // frame::print_on_error() is called by fatal error handler. Notice that we may
 // crash inside this function if stack frame is corrupted. The fatal error
 // handler can catch and handle the crash. Here we assume the frame is valid.
 //
 // First letter indicates type of the frame:
 //    J: Java frame (compiled)
 //    j: Java frame (interpreted)
 //    V: VM frame (C/C++)
 //    v: Other frames running VM generated code (e.g. stubs, adapters, etc.)
 //    C: C/C++ frame
 //
 // We don't need detailed frame type as that in frame::print_name(). "C"
 // suggests the problem is in user lib; everything else is likely a VM bug.
 void frame::print_on_error(outputStream* st, char* buf, int buflen, bool verbose) const {
   if (_cb != NULL) {
     if (Interpreter::contains(pc())) {
       Method* m = this->interpreter_frame_method();
       if (m != NULL) {
         m->name_and_sig_as_C_string(buf, buflen);
         st->print("j  %s", buf);
         st->print("+%d", this->interpreter_frame_bci());
       } else {
         st->print("j  " PTR_FORMAT, pc());
       }
     } else if (StubRoutines::contains(pc())) {
       StubCodeDesc* desc = StubCodeDesc::desc_for(pc());
       if (desc != NULL) {
         st->print("v  ~StubRoutines::%s", desc->name());
       } else {
         st->print("v  ~StubRoutines::" PTR_FORMAT, pc());
       }
     } else if (_cb->is_buffer_blob()) {
       st->print("v  ~BufferBlob::%s", ((BufferBlob *)_cb)->name());
     } else if (_cb->is_nmethod()) {
       nmethod* nm = (nmethod*)_cb;
       Method* m = nm->method();
       if (m != NULL) {
         m->name_and_sig_as_C_string(buf, buflen);
         st->print("J %d%s %s %s (%d bytes) @ " PTR_FORMAT " [" PTR_FORMAT "+0x%x]",
                   nm->compile_id(), (nm->is_osr_method() ? "%" : ""),
                   ((nm->compiler() != NULL) ? nm->compiler()->name() : ""),
                   buf, m->code_size(), _pc, _cb->code_begin(), _pc - _cb->code_begin());
       } else {
         st->print("J  " PTR_FORMAT, pc());
       }
     } else if (_cb->is_runtime_stub()) {
       st->print("v  ~RuntimeStub::%s", ((RuntimeStub *)_cb)->name());
     } else if (_cb->is_deoptimization_stub()) {
       st->print("v  ~DeoptimizationBlob");
     } else if (_cb->is_exception_stub()) {
       st->print("v  ~ExceptionBlob");
     } else if (_cb->is_safepoint_stub()) {
       st->print("v  ~SafepointBlob");
     } else {
       st->print("v  blob " PTR_FORMAT, pc());
     }
   } else {
     print_C_frame(st, buf, buflen, pc());
   }
 }
 /*
   The interpreter_frame_expression_stack_at method in the case of SPARC needs the
   max_stack value of the method in order to compute the expression stack address.
   It uses the Method* in order to get the max_stack value but during GC this
   Method* value saved on the frame is changed by reverse_and_push and hence cannot
   be used. So we save the max_stack value in the FrameClosure object and pass it
   down to the interpreter_frame_expression_stack_at method
 */
 class InterpreterFrameClosure : public OffsetClosure {
  private:
   frame* _fr;
   OopClosure* _f;
   int    _max_locals;
   int    _max_stack;
  public:
   InterpreterFrameClosure(frame* fr, int max_locals, int max_stack,
                           OopClosure* f) {
     _fr         = fr;
     _max_locals = max_locals;
     _max_stack  = max_stack;
     _f          = f;
   }
   void offset_do(int offset) {
     oop* addr;
     if (offset < _max_locals) {
       addr = (oop*) _fr->interpreter_frame_local_at(offset);
       assert((intptr_t*)addr >= _fr->sp(), "must be inside the frame");
       _f->do_oop(addr);
     } else {
       addr = (oop*) _fr->interpreter_frame_expression_stack_at((offset - _max_locals));
       // In case of exceptions, the expression stack is invalid and the esp will be reset to express
       // this condition. Therefore, we call f only if addr is 'inside' the stack (i.e., addr >= esp for Intel).
       bool in_stack;
       if (frame::interpreter_frame_expression_stack_direction() > 0) {
         in_stack = (intptr_t*)addr <= _fr->interpreter_frame_tos_address();
       } else {
         in_stack = (intptr_t*)addr >= _fr->interpreter_frame_tos_address();
       }
       if (in_stack) {
         _f->do_oop(addr);
       }
     }
   }
   int max_locals()  { return _max_locals; }
   frame* fr()       { return _fr; }
 };
 class InterpretedArgumentOopFinder: public SignatureInfo {
  private:
   OopClosure* _f;        // Closure to invoke
   int    _offset;        // TOS-relative offset, decremented with each argument
   bool   _has_receiver;  // true if the callee has a receiver
   frame* _fr;
   void set(int size, BasicType type) {
     _offset -= size;
     if (type == T_OBJECT || type == T_ARRAY) oop_offset_do();
   }
   void oop_offset_do() {
     oop* addr;
     addr = (oop*)_fr->interpreter_frame_tos_at(_offset);
     _f->do_oop(addr);
   }
  public:
   InterpretedArgumentOopFinder(Symbol* signature, bool has_receiver, frame* fr, OopClosure* f) : SignatureInfo(signature), _has_receiver(has_receiver) {
     // compute size of arguments
     int args_size = ArgumentSizeComputer(signature).size() + (has_receiver ? 1 : 0);
     assert(!fr->is_interpreted_frame() ||
            args_size <= fr->interpreter_frame_expression_stack_size(),
             "args cannot be on stack anymore");
     // initialize InterpretedArgumentOopFinder
     _f         = f;
     _fr        = fr;
     _offset    = args_size;
   }
   void oops_do() {
     if (_has_receiver) {
       --_offset;
       oop_offset_do();
     }
     iterate_parameters();
   }
 };
 // Entry frame has following form (n arguments)
 //         +-----------+
 //   sp -> |  last arg |
 //         +-----------+
 //         :    :::    :
 //         +-----------+
 // (sp+n)->|  first arg|
 //         +-----------+
 // visits and GC's all the arguments in entry frame
 class EntryFrameOopFinder: public SignatureInfo {
  private:
   bool   _is_static;
   int    _offset;
   frame* _fr;
   OopClosure* _f;
   void set(int size, BasicType type) {
     assert (_offset >= 0, "illegal offset");
     if (type == T_OBJECT || type == T_ARRAY) oop_at_offset_do(_offset);
     _offset -= size;
   }
   void oop_at_offset_do(int offset) {
     assert (offset >= 0, "illegal offset");
     oop* addr = (oop*) _fr->entry_frame_argument_at(offset);
     _f->do_oop(addr);
   }
  public:
    EntryFrameOopFinder(frame* frame, Symbol* signature, bool is_static) : SignatureInfo(signature) {
      _f = NULL; // will be set later
      _fr = frame;
      _is_static = is_static;
      _offset = ArgumentSizeComputer(signature).size() - 1; // last parameter is at index 0
    }
   void arguments_do(OopClosure* f) {
     _f = f;
     if (!_is_static) oop_at_offset_do(_offset+1); // do the receiver
     iterate_parameters();
   }
 };
 oop* frame::interpreter_callee_receiver_addr(Symbol* signature) {
   ArgumentSizeComputer asc(signature);
   int size = asc.size();
   return (oop *)interpreter_frame_tos_at(size);
 }
 void frame::oops_interpreted_do(OopClosure* f, CLDClosure* cld_f,
     const RegisterMap* map, bool query_oop_map_cache) {
   assert(is_interpreted_frame(), "Not an interpreted frame");
   assert(map != NULL, "map must be set");
   Thread *thread = Thread::current();
   methodHandle m (thread, interpreter_frame_method());
   jint      bci = interpreter_frame_bci();
   assert(!Universe::heap()->is_in(m()),
           "must be valid oop");
   assert(m->is_method(), "checking frame value");
   assert((m->is_native() && bci == 0)  ||
          (!m->is_native() && bci >= 0 && bci < m->code_size()),
          "invalid bci value");
   // Handle the monitor elements in the activation
   for (
     BasicObjectLock* current = interpreter_frame_monitor_end();
     current < interpreter_frame_monitor_begin();
     current = next_monitor_in_interpreter_frame(current)
   ) {
 #ifdef ASSERT
     interpreter_frame_verify_monitor(current);
 #endif
     current->oops_do(f);
   }
   // process fixed part
   if (cld_f != NULL) {
     // The method pointer in the frame might be the only path to the method's
     // klass, and the klass needs to be kept alive while executing. The GCs
     // don't trace through method pointers, so typically in similar situations
     // the mirror or the class loader of the klass are installed as a GC root.
     // To minimze the overhead of doing that here, we ask the GC to pass down a
     // closure that knows how to keep klasses alive given a ClassLoaderData.
     cld_f->do_cld(m->method_holder()->class_loader_data());
   }
   if (m->is_native() PPC32_ONLY(&& m->is_static())) {
     f->do_oop(interpreter_frame_temp_oop_addr());
   }
   int max_locals = m->is_native() ? m->size_of_parameters() : m->max_locals();
   Symbol* signature = NULL;
   bool has_receiver = false;
   // Process a callee's arguments if we are at a call site
   // (i.e., if we are at an invoke bytecode)
   // This is used sometimes for calling into the VM, not for another
   // interpreted or compiled frame.
   if (!m->is_native()) {
     Bytecode_invoke call = Bytecode_invoke_check(m, bci);
     if (call.is_valid()) {
       signature = call.signature();
       has_receiver = call.has_receiver();
       if (map->include_argument_oops() &&
           interpreter_frame_expression_stack_size() > 0) {
         ResourceMark rm(thread);  // is this right ???
         // we are at a call site & the expression stack is not empty
         // => process callee's arguments
         //
         // Note: The expression stack can be empty if an exception
         //       occurred during method resolution/execution. In all
         //       cases we empty the expression stack completely be-
         //       fore handling the exception (the exception handling
         //       code in the interpreter calls a blocking runtime
         //       routine which can cause this code to be executed).
         //       (was bug gri 7/27/98)
         oops_interpreted_arguments_do(signature, has_receiver, f);
       }
     }
   }
   InterpreterFrameClosure blk(this, max_locals, m->max_stack(), f);
   // process locals & expression stack
   InterpreterOopMap mask;
   if (query_oop_map_cache) {
     m->mask_for(bci, &mask);
   } else {
     OopMapCache::compute_one_oop_map(m, bci, &mask);
   }
   mask.iterate_oop(&blk);
 }
 void frame::oops_interpreted_arguments_do(Symbol* signature, bool has_receiver, OopClosure* f) {
   InterpretedArgumentOopFinder finder(signature, has_receiver, this, f);
   finder.oops_do();
 }
 void frame::oops_code_blob_do(OopClosure* f, CodeBlobClosure* cf, const RegisterMap* reg_map) {
   assert(_cb != NULL, "sanity check");
   if (_cb->oop_maps() != NULL) {
     OopMapSet::oops_do(this, reg_map, f);
     // Preserve potential arguments for a callee. We handle this by dispatching
     // on the codeblob. For c2i, we do
     if (reg_map->include_argument_oops()) {
       _cb->preserve_callee_argument_oops(*this, reg_map, f);
     }
   }
   // In cases where perm gen is collected, GC will want to mark
   // oops referenced from nmethods active on thread stacks so as to
   // prevent them from being collected. However, this visit should be
   // restricted to certain phases of the collection only. The
   // closure decides how it wants nmethods to be traced.
   if (cf != NULL)
     cf->do_code_blob(_cb);
 }
 class CompiledArgumentOopFinder: public SignatureInfo {
  protected:
   OopClosure*     _f;
   int             _offset;        // the current offset, incremented with each argument
   bool            _has_receiver;  // true if the callee has a receiver
   bool            _has_appendix;  // true if the call has an appendix
   frame           _fr;
   RegisterMap*    _reg_map;
   int             _arg_size;
   VMRegPair*      _regs;        // VMReg list of arguments
   void set(int size, BasicType type) {
     if (type == T_OBJECT || type == T_ARRAY) handle_oop_offset();
     _offset += size;
   }
   virtual void handle_oop_offset() {
     // Extract low order register number from register array.
     // In LP64-land, the high-order bits are valid but unhelpful.
     VMReg reg = _regs[_offset].first();
     oop *loc = _fr.oopmapreg_to_location(reg, _reg_map);
     _f->do_oop(loc);
   }
  public:
   CompiledArgumentOopFinder(Symbol* signature, bool has_receiver, bool has_appendix, OopClosure* f, frame fr,  const RegisterMap* reg_map)
     : SignatureInfo(signature) {
     // initialize CompiledArgumentOopFinder
     _f         = f;
     _offset    = 0;
     _has_receiver = has_receiver;
     _has_appendix = has_appendix;
     _fr        = fr;
     _reg_map   = (RegisterMap*)reg_map;
     _arg_size  = ArgumentSizeComputer(signature).size() + (has_receiver ? 1 : 0) + (has_appendix ? 1 : 0);
     int arg_size;
     _regs = SharedRuntime::find_callee_arguments(signature, has_receiver, has_appendix, &arg_size);
     assert(arg_size == _arg_size, "wrong arg size");
   }
   void oops_do() {
     if (_has_receiver) {
       handle_oop_offset();
       _offset++;
     }
     iterate_parameters();
     if (_has_appendix) {
       handle_oop_offset();
       _offset++;
     }
   }
 };
 void frame::oops_compiled_arguments_do(Symbol* signature, bool has_receiver, bool has_appendix, const RegisterMap* reg_map, OopClosure* f) {
   ResourceMark rm;
   CompiledArgumentOopFinder finder(signature, has_receiver, has_appendix, f, *this, reg_map);
   finder.oops_do();
 }
 // Get receiver out of callers frame, i.e. find parameter 0 in callers
 // frame.  Consult ADLC for where parameter 0 is to be found.  Then
 // check local reg_map for it being a callee-save register or argument
 // register, both of which are saved in the local frame.  If not found
 // there, it must be an in-stack argument of the caller.
 // Note: caller.sp() points to callee-arguments
 oop frame::retrieve_receiver(RegisterMap* reg_map) {
   frame caller = *this;
   // First consult the ADLC on where it puts parameter 0 for this signature.
   VMReg reg = SharedRuntime::name_for_receiver();
   oop* oop_adr = caller.oopmapreg_to_location(reg, reg_map);
   if (oop_adr == NULL) {
     guarantee(oop_adr != NULL, "bad register save location");
     return NULL;
   }
   oop r = *oop_adr;
   assert(Universe::heap()->is_in_or_null(r), err_msg("bad receiver: " INTPTR_FORMAT " (" INTX_FORMAT ")", (void *) r, (void *) r));
   return r;
 }
 oop* frame::oopmapreg_to_location(VMReg reg, const RegisterMap* reg_map) const {
   if(reg->is_reg()) {
     // If it is passed in a register, it got spilled in the stub frame.
     return (oop *)reg_map->location(reg);
   } else {
     int sp_offset_in_bytes = reg->reg2stack() * VMRegImpl::stack_slot_size;
     return (oop*)(((address)unextended_sp()) + sp_offset_in_bytes);
   }
 }
 BasicLock* frame::get_native_monitor() {
   nmethod* nm = (nmethod*)_cb;
   assert(_cb != NULL && _cb->is_nmethod() && nm->method()->is_native(),
          "Should not call this unless it's a native nmethod");
   int byte_offset = in_bytes(nm->native_basic_lock_sp_offset());
   assert(byte_offset >= 0, "should not see invalid offset");
   return (BasicLock*) &sp()[byte_offset / wordSize];
 }
 oop frame::get_native_receiver() {
   nmethod* nm = (nmethod*)_cb;
   assert(_cb != NULL && _cb->is_nmethod() && nm->method()->is_native(),
          "Should not call this unless it's a native nmethod");
   int byte_offset = in_bytes(nm->native_receiver_sp_offset());
   assert(byte_offset >= 0, "should not see invalid offset");
   oop owner = ((oop*) sp())[byte_offset / wordSize];
   assert( Universe::heap()->is_in(owner), "bad receiver" );
   return owner;
 }
 void frame::oops_entry_do(OopClosure* f, const RegisterMap* map) {
   assert(map != NULL, "map must be set");
   if (map->include_argument_oops()) {
     // must collect argument oops, as nobody else is doing it
     Thread *thread = Thread::current();
     methodHandle m (thread, entry_frame_call_wrapper()->callee_method());
     EntryFrameOopFinder finder(this, m->signature(), m->is_static());
     finder.arguments_do(f);
   }
   // Traverse the Handle Block saved in the entry frame
   entry_frame_call_wrapper()->oops_do(f);
 }
 void frame::oops_do_internal(OopClosure* f, CLDClosure* cld_f, CodeBlobClosure* cf, RegisterMap* map, bool use_interpreter_oop_map_cache) {
 #ifndef PRODUCT
   // simulate GC crash here to dump java thread in error report
   if (CrashGCForDumpingJavaThread) {
     char *t = NULL;
     *t = 'c';
   }
 #endif
   if (is_interpreted_frame()) {
     oops_interpreted_do(f, cld_f, map, use_interpreter_oop_map_cache);
   } else if (is_entry_frame()) {
     oops_entry_do(f, map);
   } else if (CodeCache::contains(pc())) {
     oops_code_blob_do(f, cf, map);
 #ifdef SHARK
   } else if (is_fake_stub_frame()) {
     // nothing to do
 #endif // SHARK
   } else {
     ShouldNotReachHere();
   }
 }
 void frame::nmethods_do(CodeBlobClosure* cf) {
   if (_cb != NULL && _cb->is_nmethod()) {
     cf->do_code_blob(_cb);
   }
 }
 // call f() on the interpreted Method*s in the stack.
 // Have to walk the entire code cache for the compiled frames Yuck.
 void frame::metadata_do(void f(Metadata*)) {
   if (_cb != NULL && Interpreter::contains(pc())) {
     Method* m = this->interpreter_frame_method();
     assert(m != NULL, "huh?");
     f(m);
   }
 }
 void frame::gc_prologue() {
   if (is_interpreted_frame()) {
     // set bcx to bci to become Method* position independent during GC
     interpreter_frame_set_bcx(interpreter_frame_bci());
   }
 }
 void frame::gc_epilogue() {
   if (is_interpreted_frame()) {
     // set bcx back to bcp for interpreter
     interpreter_frame_set_bcx((intptr_t)interpreter_frame_bcp());
   }
   // call processor specific epilog function
   pd_gc_epilog();
 }
 # ifdef ENABLE_ZAP_DEAD_LOCALS
 void frame::CheckValueClosure::do_oop(oop* p) {
   if (CheckOopishValues && Universe::heap()->is_in_reserved(*p)) {
     warning("value @ " INTPTR_FORMAT " looks oopish (" INTPTR_FORMAT ") (thread = " INTPTR_FORMAT ")", p, (address)*p, Thread::current());
   }
 }
 frame::CheckValueClosure frame::_check_value;
 void frame::CheckOopClosure::do_oop(oop* p) {
   if (*p != NULL && !(*p)->is_oop()) {
     warning("value @ " INTPTR_FORMAT " should be an oop (" INTPTR_FORMAT ") (thread = " INTPTR_FORMAT ")", p, (address)*p, Thread::current());
  }
 }
 frame::CheckOopClosure frame::_check_oop;
 void frame::check_derived_oop(oop* base, oop* derived) {
   _check_oop.do_oop(base);
 }
 void frame::ZapDeadClosure::do_oop(oop* p) {
   if (TraceZapDeadLocals) tty->print_cr("zapping @ " INTPTR_FORMAT " containing " INTPTR_FORMAT, p, (address)*p);
   *p = cast_to_oop<intptr_t>(0xbabebabe);
 }
 frame::ZapDeadClosure frame::_zap_dead;
 void frame::zap_dead_locals(JavaThread* thread, const RegisterMap* map) {
   assert(thread == Thread::current(), "need to synchronize to do this to another thread");
   // Tracing - part 1
   if (TraceZapDeadLocals) {
     ResourceMark rm(thread);
     tty->print_cr("--------------------------------------------------------------------------------");
     tty->print("Zapping dead locals in ");
     print_on(tty);
     tty->cr();
   }
   // Zapping
        if (is_entry_frame      ()) zap_dead_entry_locals      (thread, map);
   else if (is_interpreted_frame()) zap_dead_interpreted_locals(thread, map);
   else if (is_compiled_frame()) zap_dead_compiled_locals   (thread, map);
   else
     // could be is_runtime_frame
     // so remove error: ShouldNotReachHere();
     ;
   // Tracing - part 2
   if (TraceZapDeadLocals) {
     tty->cr();
   }
 }
 void frame::zap_dead_interpreted_locals(JavaThread *thread, const RegisterMap* map) {
   // get current interpreter 'pc'
   assert(is_interpreted_frame(), "Not an interpreted frame");
   Method* m   = interpreter_frame_method();
   int       bci = interpreter_frame_bci();
   int max_locals = m->is_native() ? m->size_of_parameters() : m->max_locals();
   // process dynamic part
   InterpreterFrameClosure value_blk(this, max_locals, m->max_stack(),
                                     &_check_value);
   InterpreterFrameClosure   oop_blk(this, max_locals, m->max_stack(),
                                     &_check_oop  );
   InterpreterFrameClosure  dead_blk(this, max_locals, m->max_stack(),
                                     &_zap_dead   );
   // get frame map
   InterpreterOopMap mask;
   m->mask_for(bci, &mask);
   mask.iterate_all( &oop_blk, &value_blk, &dead_blk);
 }
 void frame::zap_dead_compiled_locals(JavaThread* thread, const RegisterMap* reg_map) {
   ResourceMark rm(thread);
   assert(_cb != NULL, "sanity check");
   if (_cb->oop_maps() != NULL) {
     OopMapSet::all_do(this, reg_map, &_check_oop, check_derived_oop, &_check_value);
   }
 }
 void frame::zap_dead_entry_locals(JavaThread*, const RegisterMap*) {
   if (TraceZapDeadLocals) warning("frame::zap_dead_entry_locals unimplemented");
 }
 void frame::zap_dead_deoptimized_locals(JavaThread*, const RegisterMap*) {
   if (TraceZapDeadLocals) warning("frame::zap_dead_deoptimized_locals unimplemented");
 }
 # endif // ENABLE_ZAP_DEAD_LOCALS
 void frame::verify(const RegisterMap* map) {
   // for now make sure receiver type is correct
   if (is_interpreted_frame()) {
     Method* method = interpreter_frame_method();
     guarantee(method->is_method(), "method is wrong in frame::verify");
     if (!method->is_static()) {
       // fetch the receiver
       oop* p = (oop*) interpreter_frame_local_at(0);
       // make sure we have the right receiver type
     }
   }
   COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), "must be empty before verify");)
   oops_do_internal(&VerifyOopClosure::verify_oop, NULL, NULL, (RegisterMap*)map, false);
 }
 #ifdef ASSERT
 bool frame::verify_return_pc(address x) {
   if (StubRoutines::returns_to_call_stub(x)) {
     return true;
   }
   if (CodeCache::contains(x)) {
     return true;
   }
   if (Interpreter::contains(x)) {
     return true;
   }
   return false;
 }
 #endif
 #ifdef ASSERT
 void frame::interpreter_frame_verify_monitor(BasicObjectLock* value) const {
   assert(is_interpreted_frame(), "Not an interpreted frame");
   // verify that the value is in the right part of the frame
   address low_mark  = (address) interpreter_frame_monitor_end();
   address high_mark = (address) interpreter_frame_monitor_begin();
   address current   = (address) value;
   const int monitor_size = frame::interpreter_frame_monitor_size();
   guarantee((high_mark - current) % monitor_size  ==  0         , "Misaligned top of BasicObjectLock*");
   guarantee( high_mark > current                                , "Current BasicObjectLock* higher than high_mark");
   guarantee((current - low_mark) % monitor_size  ==  0         , "Misaligned bottom of BasicObjectLock*");
   guarantee( current >= low_mark                               , "Current BasicObjectLock* below than low_mark");
 }
 #endif
 #ifndef PRODUCT
 void frame::describe(FrameValues& values, int frame_no) {
   // boundaries: sp and the 'real' frame pointer
   values.describe(-1, sp(), err_msg("sp for #%d", frame_no), 1);
   intptr_t* frame_pointer = real_fp(); // Note: may differ from fp()
   // print frame info at the highest boundary
   intptr_t* info_address = MAX2(sp(), frame_pointer);
   if (info_address != frame_pointer) {
     // print frame_pointer explicitly if not marked by the frame info
     values.describe(-1, frame_pointer, err_msg("frame pointer for #%d", frame_no), 1);
   }
   if (is_entry_frame() || is_compiled_frame() || is_interpreted_frame() || is_native_frame()) {
     // Label values common to most frames
     values.describe(-1, unextended_sp(), err_msg("unextended_sp for #%d", frame_no));
   }
   if (is_interpreted_frame()) {
     Method* m = interpreter_frame_method();
     int bci = interpreter_frame_bci();
     // Label the method and current bci
     values.describe(-1, info_address,
                     FormatBuffer<1024>("#%d method %s @ %d", frame_no, m->name_and_sig_as_C_string(), bci), 2);
     values.describe(-1, info_address,
                     err_msg("- %d locals %d max stack", m->max_locals(), m->max_stack()), 1);
     if (m->max_locals() > 0) {
       intptr_t* l0 = interpreter_frame_local_at(0);
       intptr_t* ln = interpreter_frame_local_at(m->max_locals() - 1);
       values.describe(-1, MAX2(l0, ln), err_msg("locals for #%d", frame_no), 1);
       // Report each local and mark as owned by this frame
       for (int l = 0; l < m->max_locals(); l++) {
         intptr_t* l0 = interpreter_frame_local_at(l);
         values.describe(frame_no, l0, err_msg("local %d", l));
       }
     }
     // Compute the actual expression stack size
     InterpreterOopMap mask;
     OopMapCache::compute_one_oop_map(m, bci, &mask);
     intptr_t* tos = NULL;
     // Report each stack element and mark as owned by this frame
     for (int e = 0; e < mask.expression_stack_size(); e++) {
       tos = MAX2(tos, interpreter_frame_expression_stack_at(e));
       values.describe(frame_no, interpreter_frame_expression_stack_at(e),
                       err_msg("stack %d", e));
     }
     if (tos != NULL) {
       values.describe(-1, tos, err_msg("expression stack for #%d", frame_no), 1);
     }
     if (interpreter_frame_monitor_begin() != interpreter_frame_monitor_end()) {
       values.describe(frame_no, (intptr_t*)interpreter_frame_monitor_begin(), "monitors begin");
       values.describe(frame_no, (intptr_t*)interpreter_frame_monitor_end(), "monitors end");
     }
   } else if (is_entry_frame()) {
     // For now just label the frame
     values.describe(-1, info_address, err_msg("#%d entry frame", frame_no), 2);
   } else if (is_compiled_frame()) {
     // For now just label the frame
     nmethod* nm = cb()->as_nmethod_or_null();
     values.describe(-1, info_address,
                     FormatBuffer<1024>("#%d nmethod " INTPTR_FORMAT " for method %s%s", frame_no,
                                        nm, nm->method()->name_and_sig_as_C_string(),
                                        (_deopt_state == is_deoptimized) ?
                                        " (deoptimized)" :
                                        ((_deopt_state == unknown) ? " (state unknown)" : "")),
 );
   } else if (is_native_frame()) {
     // For now just label the frame
     nmethod* nm = cb()->as_nmethod_or_null();
     values.describe(-1, info_address,
                     FormatBuffer<1024>("#%d nmethod " INTPTR_FORMAT " for native method %s", frame_no,
                                        nm, nm->method()->name_and_sig_as_C_string()), 2);
   } else {
     // provide default info if not handled before
     char *info = (char *) "special frame";
     if ((_cb != NULL) &&
         (_cb->name() != NULL)) {
       info = (char *)_cb->name();
     }
     values.describe(-1, info_address, err_msg("#%d <%s>", frame_no, info), 2);
   }
   // platform dependent additional data
   describe_pd(values, frame_no);
 }
 #endif
 //-----------------------------------------------------------------------------------
 // StackFrameStream implementation
 StackFrameStream::StackFrameStream(JavaThread *thread, bool update) : _reg_map(thread, update) {
   assert(thread->has_last_Java_frame(), "sanity check");
   _fr = thread->last_frame();
   _is_done = false;
 }
 #ifndef PRODUCT
 void FrameValues::describe(int owner, intptr_t* location, const char* description, int priority) {
   FrameValue fv;
   fv.location = location;
   fv.owner = owner;
   fv.priority = priority;
   fv.description = NEW_RESOURCE_ARRAY(char, strlen(description) + 1);
   strcpy(fv.description, description);
   _values.append(fv);
 }
 #ifdef ASSERT
 void FrameValues::validate() {
   _values.sort(compare);
   bool error = false;
   FrameValue prev;
   prev.owner = -1;
   for (int i = _values.length() - 1; i >= 0; i--) {
     FrameValue fv = _values.at(i);
     if (fv.owner == -1) continue;
     if (prev.owner == -1) {
       prev = fv;
       continue;
     }
     if (prev.location == fv.location) {
       if (fv.owner != prev.owner) {
         tty->print_cr("overlapping storage");
         tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT " %s", prev.location, *prev.location, prev.description);
         tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT " %s", fv.location, *fv.location, fv.description);
         error = true;
       }
     } else {
       prev = fv;
     }
   }
   assert(!error, "invalid layout");
 }
 #endif // ASSERT
 void FrameValues::print(JavaThread* thread) {
   _values.sort(compare);
   // Sometimes values like the fp can be invalid values if the
   // register map wasn't updated during the walk.  Trim out values
   // that aren't actually in the stack of the thread.
   int min_index = 0;
   int max_index = _values.length() - 1;
   intptr_t* v0 = _values.at(min_index).location;
   intptr_t* v1 = _values.at(max_index).location;
   if (thread == Thread::current()) {
     while (!thread->is_in_stack((address)v0)) {
       v0 = _values.at(++min_index).location;
     }
     while (!thread->is_in_stack((address)v1)) {
       v1 = _values.at(--max_index).location;
     }
   } else {
     while (!thread->on_local_stack((address)v0)) {
       v0 = _values.at(++min_index).location;
     }
     while (!thread->on_local_stack((address)v1)) {
       v1 = _values.at(--max_index).location;
     }
   }
   intptr_t* min = MIN2(v0, v1);
   intptr_t* max = MAX2(v0, v1);
   intptr_t* cur = max;
   intptr_t* last = NULL;
   for (int i = max_index; i >= min_index; i--) {
     FrameValue fv = _values.at(i);
     while (cur > fv.location) {
       tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT, cur, *cur);
       cur--;
     }
     if (last == fv.location) {
       const char* spacer = "          " LP64_ONLY("        ");
       tty->print_cr(" %s  %s %s", spacer, spacer, fv.description);
     } else {
       tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT " %s", fv.location, *fv.location, fv.description);
       last = fv.location;
       cur--;
     }
   }
 }
 #endif // ndef PRODUCT

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/runtime/frame.cpp@8e875c964f41 (annotated)

src/share/vm/runtime/frame.cpp