Mercurial > hg > graal-compiler
view src/share/vm/code/debugInfoRec.hpp @ 17428:50942f016967
remove duplicate check in OopRecorder
author | Tom Rodriguez <tom.rodriguez@oracle.com> |
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date | Mon, 13 Oct 2014 15:52:19 -0700 |
parents | b888ded3ee42 |
children | be896a1983c0 |
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/* * 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, methodHandle methodH, ciMethod* method, int bci, bool reexecute, bool rethrow_exception = false, 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; #ifndef GRAAL GrowableArray<DIR_Chunk*>* _shared_chunks; #endif 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