jdk8-mips64-public/hotspot: src/share/vm/code/debugInfoRec.hpp@f2e12eb74117 (annotated)

src/share/vm/code/debugInfoRec.hpp@f2e12eb74117 (annotated)

src/share/vm/code/debugInfoRec.hpp

Fri, 28 Sep 2012 10:16:29 -0700

author: kvn
date: Fri, 28 Sep 2012 10:16:29 -0700
changeset 4117: f2e12eb74117
parent 4037: da91efe96a93
child 6876: 710a3c8b516e
permissions: -rw-r--r--

Merge

 /*
  * Copyright (c) 1998, 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.
  *
  */
 #ifndef SHARE_VM_CODE_DEBUGINFOREC_HPP
 #define SHARE_VM_CODE_DEBUGINFOREC_HPP
 #include "ci/ciClassList.hpp"
 #include "ci/ciInstanceKlass.hpp"
 #include "ci/ciMethod.hpp"
 #include "code/debugInfo.hpp"
 #include "code/location.hpp"
 #include "code/pcDesc.hpp"
 #include "compiler/oopMap.hpp"
 #include "oops/oop.hpp"
 #include "utilities/growableArray.hpp"
 //** The DebugInformationRecorder collects debugging information
 //   for a compiled method.
 //   Debugging information is used for:
 //   - garbage collecting compiled frames
 //   - stack tracing across compiled frames
 //   - deoptimizating compiled frames
 //
 //   The implementation requires the compiler to use the recorder
 //   in the following order:
 //   1) Describe debug information for safepoints at increasing addresses.
 //      a) Add safepoint entry (use add_safepoint or add_non_safepoint)
 //      b) Describe scopes for that safepoint
 //         - create locals if needed (use create_scope_values)
 //         - create expressions if needed (use create_scope_values)
 //         - create monitor stack if needed (use create_monitor_values)
 //         - describe scope (use describe_scope)
 //         "repeat last four steps for all scopes"
 //         "outer most scope first and inner most scope last"
 //         NB: nodes from create_scope_values and create_locations
 //             can be reused for simple sharing.
 //         - mark the end of the scopes (end_safepoint or end_non_safepoint)
 //   2) Use oop_size, metadata_size, data_size, pcs_size to create the nmethod
 //      and finally migrate the debugging information into the nmethod
 //      by calling copy_to.
 class DebugToken; // Opaque datatype for stored:
                   //  - GrowableArray<ScopeValue*>
                   //  - GrowableArray<MonitorValue*>
 // Alias for InvocationEntryBci.
 // Both constants are used for a pseudo-BCI which refers
 // to the state just _before_ a method is entered.
 // SynchronizationEntryBCI is used where the emphasis
 // is on the implicit monitorenter of a synchronized method.
 const int SynchronizationEntryBCI = InvocationEntryBci;
 class DIR_Chunk; // private class, a nugget of collected information
 class DebugInformationRecorder: public ResourceObj {
  public:
   // constructor
   DebugInformationRecorder(OopRecorder* oop_recorder);
   // adds an oopmap at a specific offset
   void add_oopmap(int pc_offset, OopMap* map);
   // adds a jvm mapping at pc-offset, for a safepoint only
   void add_safepoint(int pc_offset, OopMap* map);
   // adds a jvm mapping at pc-offset, for a non-safepoint (profile point)
   void add_non_safepoint(int pc_offset);
   // Describes debugging information for a scope at the given pc_offset.
   // Calls must be in non-decreasing order of pc_offset.
   // If there are several calls at a single pc_offset,
   // then they occur in the same order as they were performed by the JVM,
   // with the most recent (innermost) call being described last.
   // For a safepoint, the pc_offset must have been mentioned
   // previously by add_safepoint.
   // Otherwise, the pc_offset must have been mentioned previously
   // by add_non_safepoint, and the locals, expressions, and monitors
   // must all be null.
   void describe_scope(int         pc_offset,
                       ciMethod*   method,
                       int         bci,
                       bool        reexecute,
                       bool        is_method_handle_invoke = false,
                       bool        return_oop = false,
                       DebugToken* locals      = NULL,
                       DebugToken* expressions = NULL,
                       DebugToken* monitors    = NULL);
   void dump_object_pool(GrowableArray<ScopeValue*>* objects);
   // This call must follow every add_safepoint,
   // after any intervening describe_scope calls.
   void end_safepoint(int pc_offset)      { end_scopes(pc_offset, true); }
   void end_non_safepoint(int pc_offset)  { end_scopes(pc_offset, false); }
   // helper fuctions for describe_scope to enable sharing
   DebugToken* create_scope_values(GrowableArray<ScopeValue*>* values);
   DebugToken* create_monitor_values(GrowableArray<MonitorValue*>* monitors);
   // returns the size of the generated scopeDescs.
   int data_size();
   int pcs_size();
   int oop_size() { return oop_recorder()->oop_size(); }
   int metadata_size() { return oop_recorder()->metadata_size(); }
   // copy the generated debugging information to nmethod
   void copy_to(nmethod* nm);
   // verifies the debug information
   void verify(const nmethod* code);
   static void print_statistics() PRODUCT_RETURN;
   // Method for setting oopmaps to temporarily preserve old handling of oopmaps
   OopMapSet *_oopmaps;
   void set_oopmaps(OopMapSet *oopmaps) { _oopmaps = oopmaps; }
   OopRecorder* oop_recorder() { return _oop_recorder; }
   int last_pc_offset() { return last_pc()->pc_offset(); }
   bool recording_non_safepoints() { return _recording_non_safepoints; }
  private:
   friend class ScopeDesc;
   friend class vframeStreamCommon;
   friend class DIR_Chunk;
   // True if we are recording non-safepoint scopes.
   // This flag is set if DebugNonSafepoints is true, or if
   // JVMTI post_compiled_method_load events are enabled.
   const bool _recording_non_safepoints;
   DebugInfoWriteStream* _stream;
   DebugInfoWriteStream* stream() const { return _stream; }
   OopRecorder* _oop_recorder;
   // Scopes that have been described so far.
   GrowableArray<DIR_Chunk*>* _all_chunks;
   GrowableArray<DIR_Chunk*>* _shared_chunks;
   DIR_Chunk* _next_chunk;
   DIR_Chunk* _next_chunk_limit;
 #ifdef ASSERT
   enum { rs_null, rs_safepoint, rs_non_safepoint };
   int _recording_state;
 #endif
   PcDesc* _pcs;
   int     _pcs_size;
   int     _pcs_length;
   // Note:  Would use GrowableArray<PcDesc>, but structs are not supported.
   // PC of most recent real safepoint before the current one,
   // updated after end_scopes.
   int _prev_safepoint_pc;
   PcDesc* last_pc() {
     guarantee(_pcs_length > 0, "a safepoint must be declared already");
     return &_pcs[_pcs_length-1];
   }
   PcDesc* prev_pc() {
     guarantee(_pcs_length > 1, "a safepoint must be declared already");
     return &_pcs[_pcs_length-2];
   }
   void add_new_pc_offset(int pc_offset);
   void end_scopes(int pc_offset, bool is_safepoint);
   int  serialize_monitor_values(GrowableArray<MonitorValue*>* monitors);
   int  serialize_scope_values(GrowableArray<ScopeValue*>* values);
   int  find_sharable_decode_offset(int stream_offset);
 #ifndef PRODUCT
   bool recorders_frozen();
   void mark_recorders_frozen();
 #endif // PRODUCT
  public:
   enum { serialized_null = 0 };
 };
 #endif // SHARE_VM_CODE_DEBUGINFOREC_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/code/debugInfoRec.hpp@f2e12eb74117 (annotated)

src/share/vm/code/debugInfoRec.hpp