jdk8-mips64-public/hotspot: src/share/vm/code/compiledIC.cpp@aa3d708d67c4 (annotated)

src/share/vm/code/compiledIC.cpp@aa3d708d67c4 (annotated)

src/share/vm/code/compiledIC.cpp

Wed, 01 Feb 2012 07:59:01 -0800

author: never
date: Wed, 01 Feb 2012 07:59:01 -0800
changeset 3499: aa3d708d67c4
parent 2708: 1d1603768966
child 4037: da91efe96a93
permissions: -rw-r--r--

7141200: log some interesting information in ring buffers for crashes
Reviewed-by: kvn, jrose, kevinw, brutisso, twisti, jmasa

 /*
  * Copyright (c) 1997, 2012, 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/systemDictionary.hpp"
 #include "code/codeCache.hpp"
 #include "code/compiledIC.hpp"
 #include "code/icBuffer.hpp"
 #include "code/nmethod.hpp"
 #include "code/vtableStubs.hpp"
 #include "interpreter/interpreter.hpp"
 #include "interpreter/linkResolver.hpp"
 #include "memory/oopFactory.hpp"
 #include "oops/methodOop.hpp"
 #include "oops/oop.inline.hpp"
 #include "oops/symbol.hpp"
 #include "runtime/icache.hpp"
 #include "runtime/sharedRuntime.hpp"
 #include "runtime/stubRoutines.hpp"
 #include "utilities/events.hpp"
 // Every time a compiled IC is changed or its type is being accessed,
 // either the CompiledIC_lock must be set or we must be at a safe point.
 //-----------------------------------------------------------------------------
 // Low-level access to an inline cache. Private, since they might not be
 // MT-safe to use.
 void CompiledIC::set_cached_oop(oop cache) {
   assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
   assert (!is_optimized(), "an optimized virtual call does not have a cached oop");
   assert (cache == NULL || cache != badOop, "invalid oop");
   if (TraceCompiledIC) {
     tty->print("  ");
     print_compiled_ic();
     tty->print_cr(" changing oop to " INTPTR_FORMAT, (address)cache);
   }
   if (cache == NULL)  cache = (oop)Universe::non_oop_word();
   *_oop_addr = cache;
   // fix up the relocations
   RelocIterator iter = _oops;
   while (iter.next()) {
     if (iter.type() == relocInfo::oop_type) {
       oop_Relocation* r = iter.oop_reloc();
       if (r->oop_addr() == _oop_addr)
         r->fix_oop_relocation();
     }
   }
   return;
 }
 oop CompiledIC::cached_oop() const {
   assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
   assert (!is_optimized(), "an optimized virtual call does not have a cached oop");
   if (!is_in_transition_state()) {
     oop data = *_oop_addr;
     // If we let the oop value here be initialized to zero...
     assert(data != NULL || Universe::non_oop_word() == NULL,
            "no raw nulls in CompiledIC oops, because of patching races");
     return (data == (oop)Universe::non_oop_word()) ? (oop)NULL : data;
   } else {
     return InlineCacheBuffer::cached_oop_for((CompiledIC *)this);
   }
 }
 void CompiledIC::set_ic_destination(address entry_point) {
   assert(entry_point != NULL, "must set legal entry point");
   assert(CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
   if (TraceCompiledIC) {
     tty->print("  ");
     print_compiled_ic();
     tty->print_cr(" changing destination to " INTPTR_FORMAT, entry_point);
   }
   MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag);
 #ifdef ASSERT
   CodeBlob* cb = CodeCache::find_blob_unsafe(_ic_call);
   assert(cb != NULL && cb->is_nmethod(), "must be nmethod");
 #endif
   _ic_call->set_destination_mt_safe(entry_point);
 }
 address CompiledIC::ic_destination() const {
  assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
  if (!is_in_transition_state()) {
    return _ic_call->destination();
  } else {
    return InlineCacheBuffer::ic_destination_for((CompiledIC *)this);
  }
 }
 bool CompiledIC::is_in_transition_state() const {
   assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
   return InlineCacheBuffer::contains(_ic_call->destination());
 }
 // Returns native address of 'call' instruction in inline-cache. Used by
 // the InlineCacheBuffer when it needs to find the stub.
 address CompiledIC::stub_address() const {
   assert(is_in_transition_state(), "should only be called when we are in a transition state");
   return _ic_call->destination();
 }
 //-----------------------------------------------------------------------------
 // High-level access to an inline cache. Guaranteed to be MT-safe.
 void CompiledIC::set_to_megamorphic(CallInfo* call_info, Bytecodes::Code bytecode, TRAPS) {
   methodHandle method = call_info->selected_method();
   bool is_invoke_interface = (bytecode == Bytecodes::_invokeinterface && !call_info->has_vtable_index());
   assert(CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
   assert(method->is_oop(), "cannot be NULL and must be oop");
   assert(!is_optimized(), "cannot set an optimized virtual call to megamorphic");
   assert(is_call_to_compiled() || is_call_to_interpreted(), "going directly to megamorphic?");
   address entry;
   if (is_invoke_interface) {
     int index = klassItable::compute_itable_index(call_info->resolved_method()());
     entry = VtableStubs::create_stub(false, index, method());
     assert(entry != NULL, "entry not computed");
     klassOop k = call_info->resolved_method()->method_holder();
     assert(Klass::cast(k)->is_interface(), "sanity check");
     InlineCacheBuffer::create_transition_stub(this, k, entry);
   } else {
     // Can be different than method->vtable_index(), due to package-private etc.
     int vtable_index = call_info->vtable_index();
     entry = VtableStubs::create_stub(true, vtable_index, method());
     InlineCacheBuffer::create_transition_stub(this, method(), entry);
   }
   if (TraceICs) {
     ResourceMark rm;
     tty->print_cr ("IC@" INTPTR_FORMAT ": to megamorphic %s entry: " INTPTR_FORMAT,
                    instruction_address(), method->print_value_string(), entry);
   }
   // We can't check this anymore. With lazy deopt we could have already
   // cleaned this IC entry before we even return. This is possible if
   // we ran out of space in the inline cache buffer trying to do the
   // set_next and we safepointed to free up space. This is a benign
   // race because the IC entry was complete when we safepointed so
   // cleaning it immediately is harmless.
   // assert(is_megamorphic(), "sanity check");
 }
 // true if destination is megamorphic stub
 bool CompiledIC::is_megamorphic() const {
   assert(CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
   assert(!is_optimized(), "an optimized call cannot be megamorphic");
   // Cannot rely on cached_oop. It is either an interface or a method.
   return VtableStubs::is_entry_point(ic_destination());
 }
 bool CompiledIC::is_call_to_compiled() const {
   assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
   // Use unsafe, since an inline cache might point to a zombie method. However, the zombie
   // method is guaranteed to still exist, since we only remove methods after all inline caches
   // has been cleaned up
   CodeBlob* cb = CodeCache::find_blob_unsafe(ic_destination());
   bool is_monomorphic = (cb != NULL && cb->is_nmethod());
   // Check that the cached_oop is a klass for non-optimized monomorphic calls
   // This assertion is invalid for compiler1: a call that does not look optimized (no static stub) can be used
   // for calling directly to vep without using the inline cache (i.e., cached_oop == NULL)
 #ifdef ASSERT
 #ifdef TIERED
   CodeBlob* caller = CodeCache::find_blob_unsafe(instruction_address());
   bool is_c1_method = caller->is_compiled_by_c1();
 #else
 #ifdef COMPILER1
   bool is_c1_method = true;
 #else
   bool is_c1_method = false;
 #endif // COMPILER1
 #endif // TIERED
   assert( is_c1_method ||
          !is_monomorphic ||
          is_optimized() ||
          (cached_oop() != NULL && cached_oop()->is_klass()), "sanity check");
 #endif // ASSERT
   return is_monomorphic;
 }
 bool CompiledIC::is_call_to_interpreted() const {
   assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
   // Call to interpreter if destination is either calling to a stub (if it
   // is optimized), or calling to an I2C blob
   bool is_call_to_interpreted = false;
   if (!is_optimized()) {
     // must use unsafe because the destination can be a zombie (and we're cleaning)
     // and the print_compiled_ic code wants to know if site (in the non-zombie)
     // is to the interpreter.
     CodeBlob* cb = CodeCache::find_blob_unsafe(ic_destination());
     is_call_to_interpreted = (cb != NULL && cb->is_adapter_blob());
     assert(!is_call_to_interpreted ||  (cached_oop() != NULL && cached_oop()->is_compiledICHolder()), "sanity check");
   } else {
     // Check if we are calling into our own codeblob (i.e., to a stub)
     CodeBlob* cb = CodeCache::find_blob(_ic_call->instruction_address());
     address dest = ic_destination();
 #ifdef ASSERT
     {
       CodeBlob* db = CodeCache::find_blob_unsafe(dest);
       assert(!db->is_adapter_blob(), "must use stub!");
     }
 #endif /* ASSERT */
     is_call_to_interpreted = cb->contains(dest);
   }
   return is_call_to_interpreted;
 }
 void CompiledIC::set_to_clean() {
   assert(SafepointSynchronize::is_at_safepoint() || CompiledIC_lock->is_locked() , "MT-unsafe call");
   if (TraceInlineCacheClearing || TraceICs) {
     tty->print_cr("IC@" INTPTR_FORMAT ": set to clean", instruction_address());
     print();
   }
   address entry;
   if (is_optimized()) {
     entry = SharedRuntime::get_resolve_opt_virtual_call_stub();
   } else {
     entry = SharedRuntime::get_resolve_virtual_call_stub();
   }
   // A zombie transition will always be safe, since the oop has already been set to NULL, so
   // we only need to patch the destination
   bool safe_transition = is_optimized() || SafepointSynchronize::is_at_safepoint();
   if (safe_transition) {
     if (!is_optimized()) set_cached_oop(NULL);
     // Kill any leftover stub we might have too
     if (is_in_transition_state()) {
       ICStub* old_stub = ICStub_from_destination_address(stub_address());
       old_stub->clear();
     }
     set_ic_destination(entry);
   } else {
     // Unsafe transition - create stub.
     InlineCacheBuffer::create_transition_stub(this, NULL, entry);
   }
   // We can't check this anymore. With lazy deopt we could have already
   // cleaned this IC entry before we even return. This is possible if
   // we ran out of space in the inline cache buffer trying to do the
   // set_next and we safepointed to free up space. This is a benign
   // race because the IC entry was complete when we safepointed so
   // cleaning it immediately is harmless.
   // assert(is_clean(), "sanity check");
 }
 bool CompiledIC::is_clean() const {
   assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
   bool is_clean = false;
   address dest = ic_destination();
   is_clean = dest == SharedRuntime::get_resolve_opt_virtual_call_stub() ||
              dest == SharedRuntime::get_resolve_virtual_call_stub();
   assert(!is_clean || is_optimized() || cached_oop() == NULL, "sanity check");
   return is_clean;
 }
 void CompiledIC::set_to_monomorphic(const CompiledICInfo& info) {
   assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
   // Updating a cache to the wrong entry can cause bugs that are very hard
   // to track down - if cache entry gets invalid - we just clean it. In
   // this way it is always the same code path that is responsible for
   // updating and resolving an inline cache
   //
   // The above is no longer true. SharedRuntime::fixup_callers_callsite will change optimized
   // callsites. In addition ic_miss code will update a site to monomorphic if it determines
   // that an monomorphic call to the interpreter can now be monomorphic to compiled code.
   //
   // In both of these cases the only thing being modifed is the jump/call target and these
   // transitions are mt_safe
   Thread *thread = Thread::current();
   if (info._to_interpreter) {
     // Call to interpreter
     if (info.is_optimized() && is_optimized()) {
        assert(is_clean(), "unsafe IC path");
        MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag);
       // the call analysis (callee structure) specifies that the call is optimized
       // (either because of CHA or the static target is final)
       // At code generation time, this call has been emitted as static call
       // Call via stub
       assert(info.cached_oop().not_null() && info.cached_oop()->is_method(), "sanity check");
       CompiledStaticCall* csc = compiledStaticCall_at(instruction_address());
       methodHandle method (thread, (methodOop)info.cached_oop()());
       csc->set_to_interpreted(method, info.entry());
       if (TraceICs) {
          ResourceMark rm(thread);
          tty->print_cr ("IC@" INTPTR_FORMAT ": monomorphic to interpreter: %s",
            instruction_address(),
            method->print_value_string());
       }
     } else {
       // Call via method-klass-holder
       assert(info.cached_oop().not_null(), "must be set");
       InlineCacheBuffer::create_transition_stub(this, info.cached_oop()(), info.entry());
       if (TraceICs) {
          ResourceMark rm(thread);
          tty->print_cr ("IC@" INTPTR_FORMAT ": monomorphic to interpreter via mkh", instruction_address());
       }
     }
   } else {
     // Call to compiled code
     bool static_bound = info.is_optimized() || (info.cached_oop().is_null());
 #ifdef ASSERT
     CodeBlob* cb = CodeCache::find_blob_unsafe(info.entry());
     assert (cb->is_nmethod(), "must be compiled!");
 #endif /* ASSERT */
     // This is MT safe if we come from a clean-cache and go through a
     // non-verified entry point
     bool safe = SafepointSynchronize::is_at_safepoint() ||
                 (!is_in_transition_state() && (info.is_optimized() || static_bound || is_clean()));
     if (!safe) {
       InlineCacheBuffer::create_transition_stub(this, info.cached_oop()(), info.entry());
     } else {
       set_ic_destination(info.entry());
       if (!is_optimized()) set_cached_oop(info.cached_oop()());
     }
     if (TraceICs) {
       ResourceMark rm(thread);
       assert(info.cached_oop() == NULL || info.cached_oop()()->is_klass(), "must be");
       tty->print_cr ("IC@" INTPTR_FORMAT ": monomorphic to compiled (rcvr klass) %s: %s",
         instruction_address(),
         ((klassOop)info.cached_oop()())->print_value_string(),
         (safe) ? "" : "via stub");
     }
   }
   // We can't check this anymore. With lazy deopt we could have already
   // cleaned this IC entry before we even return. This is possible if
   // we ran out of space in the inline cache buffer trying to do the
   // set_next and we safepointed to free up space. This is a benign
   // race because the IC entry was complete when we safepointed so
   // cleaning it immediately is harmless.
   // assert(is_call_to_compiled() || is_call_to_interpreted(), "sanity check");
 }
 // is_optimized: Compiler has generated an optimized call (i.e., no inline
 // cache) static_bound: The call can be static bound (i.e, no need to use
 // inline cache)
 void CompiledIC::compute_monomorphic_entry(methodHandle method,
                                            KlassHandle receiver_klass,
                                            bool is_optimized,
                                            bool static_bound,
                                            CompiledICInfo& info,
                                            TRAPS) {
   info._is_optimized = is_optimized;
   nmethod* method_code = method->code();
   address entry = NULL;
   if (method_code != NULL) {
     // Call to compiled code
     if (static_bound || is_optimized) {
       entry      = method_code->verified_entry_point();
     } else {
       entry      = method_code->entry_point();
     }
   }
   if (entry != NULL) {
     // Call to compiled code
     info._entry      = entry;
     if (static_bound || is_optimized) {
       info._cached_oop = Handle(THREAD, (oop)NULL);
     } else {
       info._cached_oop = receiver_klass;
     }
     info._to_interpreter = false;
   } else {
     // Note: the following problem exists with Compiler1:
     //   - at compile time we may or may not know if the destination is final
     //   - if we know that the destination is final, we will emit an optimized
     //     virtual call (no inline cache), and need a methodOop to make a call
     //     to the interpreter
     //   - if we do not know if the destination is final, we emit a standard
     //     virtual call, and use CompiledICHolder to call interpreted code
     //     (no static call stub has been generated)
     //     However in that case we will now notice it is static_bound
     //     and convert the call into what looks to be an optimized
     //     virtual call. This causes problems in verifying the IC because
     //     it look vanilla but is optimized. Code in is_call_to_interpreted
     //     is aware of this and weakens its asserts.
     info._to_interpreter = true;
     // static_bound should imply is_optimized -- otherwise we have a
     // performance bug (statically-bindable method is called via
     // dynamically-dispatched call note: the reverse implication isn't
     // necessarily true -- the call may have been optimized based on compiler
     // analysis (static_bound is only based on "final" etc.)
 #ifdef COMPILER2
 #ifdef TIERED
 #if defined(ASSERT)
     // can't check the assert because we don't have the CompiledIC with which to
     // find the address if the call instruction.
     //
     // CodeBlob* cb = find_blob_unsafe(instruction_address());
     // assert(cb->is_compiled_by_c1() || !static_bound || is_optimized, "static_bound should imply is_optimized");
 #endif // ASSERT
 #else
     assert(!static_bound || is_optimized, "static_bound should imply is_optimized");
 #endif // TIERED
 #endif // COMPILER2
     if (is_optimized) {
       // Use stub entry
       info._entry      = method()->get_c2i_entry();
       info._cached_oop = method;
     } else {
       // Use mkh entry
       oop holder = oopFactory::new_compiledICHolder(method, receiver_klass, CHECK);
       info._cached_oop = Handle(THREAD, holder);
       info._entry      = method()->get_c2i_unverified_entry();
     }
   }
 }
 inline static RelocIterator parse_ic(nmethod* nm, address ic_call, oop* &_oop_addr, bool *is_optimized) {
    address  first_oop = NULL;
    // Mergers please note: Sun SC5.x CC insists on an lvalue for a reference parameter.
    nmethod* tmp_nm = nm;
    return virtual_call_Relocation::parse_ic(tmp_nm, ic_call, first_oop, _oop_addr, is_optimized);
 }
 CompiledIC::CompiledIC(NativeCall* ic_call)
   : _ic_call(ic_call),
     _oops(parse_ic(NULL, ic_call->instruction_address(), _oop_addr, &_is_optimized))
 {
 }
 CompiledIC::CompiledIC(Relocation* ic_reloc)
   : _ic_call(nativeCall_at(ic_reloc->addr())),
     _oops(parse_ic(ic_reloc->code(), ic_reloc->addr(), _oop_addr, &_is_optimized))
 {
   assert(ic_reloc->type() == relocInfo::virtual_call_type ||
          ic_reloc->type() == relocInfo::opt_virtual_call_type, "wrong reloc. info");
 }
 // ----------------------------------------------------------------------------
 void CompiledStaticCall::set_to_clean() {
   assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call");
   // Reset call site
   MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag);
 #ifdef ASSERT
   CodeBlob* cb = CodeCache::find_blob_unsafe(this);
   assert(cb != NULL && cb->is_nmethod(), "must be nmethod");
 #endif
   set_destination_mt_safe(SharedRuntime::get_resolve_static_call_stub());
   // Do not reset stub here:  It is too expensive to call find_stub.
   // Instead, rely on caller (nmethod::clear_inline_caches) to clear
   // both the call and its stub.
 }
 bool CompiledStaticCall::is_clean() const {
   return destination() == SharedRuntime::get_resolve_static_call_stub();
 }
 bool CompiledStaticCall::is_call_to_compiled() const {
   return CodeCache::contains(destination());
 }
 bool CompiledStaticCall::is_call_to_interpreted() const {
   // It is a call to interpreted, if it calls to a stub. Hence, the destination
   // must be in the stub part of the nmethod that contains the call
   nmethod* nm = CodeCache::find_nmethod(instruction_address());
   return nm->stub_contains(destination());
 }
 void CompiledStaticCall::set_to_interpreted(methodHandle callee, address entry) {
   address stub=find_stub();
   assert(stub!=NULL, "stub not found");
   if (TraceICs) {
     ResourceMark rm;
     tty->print_cr("CompiledStaticCall@" INTPTR_FORMAT ": set_to_interpreted %s",
                   instruction_address(),
                   callee->name_and_sig_as_C_string());
   }
   NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);   // creation also verifies the object
   NativeJump*        jump          = nativeJump_at(method_holder->next_instruction_address());
   assert(method_holder->data()    == 0           || method_holder->data()    == (intptr_t)callee(), "a) MT-unsafe modification of inline cache");
   assert(jump->jump_destination() == (address)-1 || jump->jump_destination() == entry, "b) MT-unsafe modification of inline cache");
   // Update stub
   method_holder->set_data((intptr_t)callee());
   jump->set_jump_destination(entry);
   // Update jump to call
   set_destination_mt_safe(stub);
 }
 void CompiledStaticCall::set(const StaticCallInfo& info) {
   assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call");
   MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag);
   // Updating a cache to the wrong entry can cause bugs that are very hard
   // to track down - if cache entry gets invalid - we just clean it. In
   // this way it is always the same code path that is responsible for
   // updating and resolving an inline cache
   assert(is_clean(), "do not update a call entry - use clean");
   if (info._to_interpreter) {
     // Call to interpreted code
     set_to_interpreted(info.callee(), info.entry());
   } else {
     if (TraceICs) {
       ResourceMark rm;
       tty->print_cr("CompiledStaticCall@" INTPTR_FORMAT ": set_to_compiled " INTPTR_FORMAT,
                     instruction_address(),
                     info.entry());
     }
     // Call to compiled code
     assert (CodeCache::contains(info.entry()), "wrong entry point");
     set_destination_mt_safe(info.entry());
   }
 }
 // Compute settings for a CompiledStaticCall. Since we might have to set
 // the stub when calling to the interpreter, we need to return arguments.
 void CompiledStaticCall::compute_entry(methodHandle m, StaticCallInfo& info) {
   nmethod* m_code = m->code();
   info._callee = m;
   if (m_code != NULL) {
     info._to_interpreter = false;
     info._entry  = m_code->verified_entry_point();
   } else {
     // Callee is interpreted code.  In any case entering the interpreter
     // puts a converter-frame on the stack to save arguments.
     info._to_interpreter = true;
     info._entry      = m()->get_c2i_entry();
   }
 }
 void CompiledStaticCall::set_stub_to_clean(static_stub_Relocation* static_stub) {
   assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call");
   // Reset stub
   address stub = static_stub->addr();
   assert(stub!=NULL, "stub not found");
   NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);   // creation also verifies the object
   NativeJump*        jump          = nativeJump_at(method_holder->next_instruction_address());
   method_holder->set_data(0);
   jump->set_jump_destination((address)-1);
 }
 address CompiledStaticCall::find_stub() {
   // Find reloc. information containing this call-site
   RelocIterator iter((nmethod*)NULL, instruction_address());
   while (iter.next()) {
     if (iter.addr() == instruction_address()) {
       switch(iter.type()) {
         case relocInfo::static_call_type:
           return iter.static_call_reloc()->static_stub();
         // We check here for opt_virtual_call_type, since we reuse the code
         // from the CompiledIC implementation
         case relocInfo::opt_virtual_call_type:
           return iter.opt_virtual_call_reloc()->static_stub();
         case relocInfo::poll_type:
         case relocInfo::poll_return_type: // A safepoint can't overlap a call.
         default:
           ShouldNotReachHere();
       }
     }
   }
   return NULL;
 }
 //-----------------------------------------------------------------------------
 // Non-product mode code
 #ifndef PRODUCT
 void CompiledIC::verify() {
   // make sure code pattern is actually a call imm32 instruction
   _ic_call->verify();
   if (os::is_MP()) {
     _ic_call->verify_alignment();
   }
   assert(is_clean() || is_call_to_compiled() || is_call_to_interpreted()
           || is_optimized() || is_megamorphic(), "sanity check");
 }
 void CompiledIC::print() {
   print_compiled_ic();
   tty->cr();
 }
 void CompiledIC::print_compiled_ic() {
   tty->print("Inline cache at " INTPTR_FORMAT ", calling %s " INTPTR_FORMAT,
              instruction_address(), is_call_to_interpreted() ? "interpreted " : "", ic_destination());
 }
 void CompiledStaticCall::print() {
   tty->print("static call at " INTPTR_FORMAT " -> ", instruction_address());
   if (is_clean()) {
     tty->print("clean");
   } else if (is_call_to_compiled()) {
     tty->print("compiled");
   } else if (is_call_to_interpreted()) {
     tty->print("interpreted");
   }
   tty->cr();
 }
 void CompiledStaticCall::verify() {
   // Verify call
   NativeCall::verify();
   if (os::is_MP()) {
     verify_alignment();
   }
   // Verify stub
   address stub = find_stub();
   assert(stub != NULL, "no stub found for static call");
   NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);   // creation also verifies the object
   NativeJump*        jump          = nativeJump_at(method_holder->next_instruction_address());
   // Verify state
   assert(is_clean() || is_call_to_compiled() || is_call_to_interpreted(), "sanity check");
 }
 #endif

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/code/compiledIC.cpp@aa3d708d67c4 (annotated)

src/share/vm/code/compiledIC.cpp