author | pchilanomate |
Tue, 09 Jul 2019 14:38:48 -0400 | |
changeset 55625 | f7e8dbb77156 |
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/* |
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* Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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#ifndef SHARE_RUNTIME_VFRAME_HPP |
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#define SHARE_RUNTIME_VFRAME_HPP |
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#include "code/debugInfo.hpp" |
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#include "code/debugInfoRec.hpp" |
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#include "code/location.hpp" |
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#include "oops/oop.hpp" |
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#include "runtime/frame.hpp" |
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#include "runtime/stackValue.hpp" |
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#include "runtime/stackValueCollection.hpp" |
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#include "utilities/growableArray.hpp" |
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// vframes are virtual stack frames representing source level activations. |
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// A single frame may hold several source level activations in the case of |
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// optimized code. The debugging stored with the optimized code enables |
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// us to unfold a frame as a stack of vframes. |
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// A cVFrame represents an activation of a non-java method. |
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// The vframe inheritance hierarchy: |
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// - vframe |
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// - javaVFrame |
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// - interpretedVFrame |
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// - compiledVFrame ; (used for both compiled Java methods and native stubs) |
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// - externalVFrame |
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// - entryVFrame ; special frame created when calling Java from C |
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// - BasicLock |
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class vframe: public ResourceObj { |
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protected: |
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frame _fr; // Raw frame behind the virtual frame. |
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RegisterMap _reg_map; // Register map for the raw frame (used to handle callee-saved registers). |
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JavaThread* _thread; // The thread owning the raw frame. |
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vframe(const frame* fr, const RegisterMap* reg_map, JavaThread* thread); |
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vframe(const frame* fr, JavaThread* thread); |
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public: |
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// Factory method for creating vframes |
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static vframe* new_vframe(const frame* f, const RegisterMap *reg_map, JavaThread* thread); |
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// Accessors |
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frame fr() const { return _fr; } |
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CodeBlob* cb() const { return _fr.cb(); } |
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CompiledMethod* nm() const { |
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assert( cb() != NULL && cb()->is_compiled(), "usage"); |
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return (CompiledMethod*) cb(); |
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} |
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// ???? Does this need to be a copy? |
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frame* frame_pointer() { return &_fr; } |
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const RegisterMap* register_map() const { return &_reg_map; } |
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JavaThread* thread() const { return _thread; } |
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// Returns the sender vframe |
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virtual vframe* sender() const; |
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// Returns the next javaVFrame on the stack (skipping all other kinds of frame) |
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javaVFrame *java_sender() const; |
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// Answers if the this is the top vframe in the frame, i.e., if the sender vframe |
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// is in the caller frame |
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virtual bool is_top() const { return true; } |
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// Returns top vframe within same frame (see is_top()) |
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virtual vframe* top() const; |
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// Type testing operations |
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virtual bool is_entry_frame() const { return false; } |
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virtual bool is_java_frame() const { return false; } |
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virtual bool is_interpreted_frame() const { return false; } |
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virtual bool is_compiled_frame() const { return false; } |
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#ifndef PRODUCT |
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// printing operations |
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virtual void print_value() const; |
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virtual void print(); |
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#endif |
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}; |
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class javaVFrame: public vframe { |
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public: |
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// JVM state |
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virtual Method* method() const = 0; |
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virtual int bci() const = 0; |
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virtual StackValueCollection* locals() const = 0; |
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virtual StackValueCollection* expressions() const = 0; |
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// the order returned by monitors() is from oldest -> youngest#4418568 |
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virtual GrowableArray<MonitorInfo*>* monitors() const = 0; |
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// Debugging support via JVMTI. |
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// NOTE that this is not guaranteed to give correct results for compiled vframes. |
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// Deoptimize first if necessary. |
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virtual void set_locals(StackValueCollection* values) const = 0; |
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// Test operation |
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bool is_java_frame() const { return true; } |
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protected: |
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javaVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread) : vframe(fr, reg_map, thread) {} |
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javaVFrame(const frame* fr, JavaThread* thread) : vframe(fr, thread) {} |
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public: |
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// casting |
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static javaVFrame* cast(vframe* vf) { |
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assert(vf == NULL || vf->is_java_frame(), "must be java frame"); |
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return (javaVFrame*) vf; |
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} |
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// Return an array of monitors locked by this frame in the youngest to oldest order |
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GrowableArray<MonitorInfo*>* locked_monitors(); |
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// printing used during stack dumps and diagnostics |
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static void print_locked_object_class_name(outputStream* st, Handle obj, const char* lock_state); |
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void print_lock_info_on(outputStream* st, int frame_count); |
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void print_lock_info(int frame_count) { print_lock_info_on(tty, frame_count); } |
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#ifndef PRODUCT |
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public: |
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// printing operations |
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void print(); |
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void print_value() const; |
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void print_activation(int index) const; |
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// verify operations |
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virtual void verify() const; |
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// Structural compare |
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bool structural_compare(javaVFrame* other); |
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#endif |
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friend class vframe; |
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}; |
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class interpretedVFrame: public javaVFrame { |
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public: |
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// JVM state |
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Method* method() const; |
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int bci() const; |
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StackValueCollection* locals() const; |
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StackValueCollection* expressions() const; |
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GrowableArray<MonitorInfo*>* monitors() const; |
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void set_locals(StackValueCollection* values) const; |
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// Test operation |
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bool is_interpreted_frame() const { return true; } |
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protected: |
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interpretedVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread) : javaVFrame(fr, reg_map, thread) {}; |
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public: |
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// Accessors for Byte Code Pointer |
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u_char* bcp() const; |
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void set_bcp(u_char* bcp); |
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// casting |
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static interpretedVFrame* cast(vframe* vf) { |
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assert(vf == NULL || vf->is_interpreted_frame(), "must be interpreted frame"); |
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return (interpretedVFrame*) vf; |
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} |
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private: |
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static const int bcp_offset; |
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intptr_t* locals_addr_at(int offset) const; |
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StackValueCollection* stack_data(bool expressions) const; |
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// returns where the parameters starts relative to the frame pointer |
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int start_of_parameters() const; |
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#ifndef PRODUCT |
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public: |
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// verify operations |
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void verify() const; |
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#endif |
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friend class vframe; |
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}; |
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class externalVFrame: public vframe { |
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protected: |
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externalVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread) : vframe(fr, reg_map, thread) {} |
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#ifndef PRODUCT |
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public: |
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// printing operations |
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void print_value() const; |
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void print(); |
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#endif |
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friend class vframe; |
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}; |
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class entryVFrame: public externalVFrame { |
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public: |
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bool is_entry_frame() const { return true; } |
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protected: |
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entryVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread); |
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public: |
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// casting |
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static entryVFrame* cast(vframe* vf) { |
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assert(vf == NULL || vf->is_entry_frame(), "must be entry frame"); |
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return (entryVFrame*) vf; |
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} |
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#ifndef PRODUCT |
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public: |
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// printing |
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void print_value() const; |
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void print(); |
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#endif |
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friend class vframe; |
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}; |
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// A MonitorInfo is a ResourceObject that describes a the pair: |
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// 1) the owner of the monitor |
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// 2) the monitor lock |
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class MonitorInfo : public ResourceObj { |
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private: |
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oop _owner; // the object owning the monitor |
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BasicLock* _lock; |
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oop _owner_klass; // klass (mirror) if owner was scalar replaced |
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bool _eliminated; |
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bool _owner_is_scalar_replaced; |
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public: |
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// Constructor |
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MonitorInfo(oop owner, BasicLock* lock, bool eliminated, bool owner_is_scalar_replaced) { |
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if (!owner_is_scalar_replaced) { |
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_owner = owner; |
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_owner_klass = NULL; |
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} else { |
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assert(eliminated, "monitor should be eliminated for scalar replaced object"); |
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_owner = NULL; |
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_owner_klass = owner; |
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} |
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_lock = lock; |
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_eliminated = eliminated; |
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_owner_is_scalar_replaced = owner_is_scalar_replaced; |
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} |
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// Accessors |
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oop owner() const { |
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assert(!_owner_is_scalar_replaced, "should not be called for scalar replaced object"); |
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return _owner; |
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} |
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oop owner_klass() const { |
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assert(_owner_is_scalar_replaced, "should not be called for not scalar replaced object"); |
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return _owner_klass; |
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} |
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BasicLock* lock() const { return _lock; } |
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bool eliminated() const { return _eliminated; } |
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bool owner_is_scalar_replaced() const { return _owner_is_scalar_replaced; } |
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}; |
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class vframeStreamCommon : StackObj { |
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protected: |
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// common |
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frame _prev_frame; |
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frame _frame; |
283 |
JavaThread* _thread; |
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RegisterMap _reg_map; |
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enum { interpreted_mode, compiled_mode, at_end_mode } _mode; |
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// For compiled_mode |
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int _decode_offset; |
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int _sender_decode_offset; |
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int _vframe_id; |
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// Cached information |
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Method* _method; |
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int _bci; |
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// Should VM activations be ignored or not |
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bool _stop_at_java_call_stub; |
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298 |
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bool fill_in_compiled_inlined_sender(); |
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void fill_from_compiled_frame(int decode_offset); |
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void fill_from_compiled_native_frame(); |
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302 |
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void fill_from_interpreter_frame(); |
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bool fill_from_frame(); |
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// Helper routine for security_get_caller_frame |
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void skip_prefixed_method_and_wrappers(); |
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DEBUG_ONLY(void found_bad_method_frame() const;) |
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public: |
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// Constructor |
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inline vframeStreamCommon(JavaThread* thread); |
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// Accessors |
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Method* method() const { return _method; } |
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int bci() const { return _bci; } |
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inline intptr_t* frame_id() const; |
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address frame_pc() const { return _frame.pc(); } |
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CodeBlob* cb() const { return _frame.cb(); } |
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CompiledMethod* nm() const { |
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assert( cb() != NULL && cb()->is_compiled(), "usage"); |
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return (CompiledMethod*) cb(); |
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} |
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53065 | 327 |
javaVFrame* asJavaVFrame(); |
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1 | 329 |
// Frame type |
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inline bool is_interpreted_frame() const; |
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inline bool is_entry_frame() const; |
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// Iteration |
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inline void next(); |
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void security_next(); |
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bool at_end() const { return _mode == at_end_mode; } |
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// Implements security traversal. Skips depth no. of frame including |
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// special security frames and prefixed native methods |
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void security_get_caller_frame(int depth); |
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// Helper routine for JVM_LatestUserDefinedLoader -- needed for 1.4 |
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// reflection implementation |
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void skip_reflection_related_frames(); |
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}; |
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class vframeStream : public vframeStreamCommon { |
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public: |
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// Constructors |
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vframeStream(JavaThread* thread, bool stop_at_java_call_stub = false); |
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// top_frame may not be at safepoint, start with sender |
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vframeStream(JavaThread* thread, frame top_frame, bool stop_at_java_call_stub = false); |
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}; |
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#endif // SHARE_RUNTIME_VFRAME_HPP |