124 lines
3.8 KiB
C++
124 lines
3.8 KiB
C++
/*
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* Copyright 1997-2006 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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*/
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// SimpleScopeDesc is used when all you need to extract from
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// a given pc,nmethod pair is a methodOop and a bci. This is
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// quite a bit faster than allocating a full ScopeDesc, but
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// very limited in abilities.
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class SimpleScopeDesc : public StackObj {
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private:
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methodOop _method;
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int _bci;
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public:
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SimpleScopeDesc(nmethod* code,address pc) {
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PcDesc* pc_desc = code->pc_desc_at(pc);
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assert(pc_desc != NULL, "Must be able to find matching PcDesc");
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DebugInfoReadStream buffer(code, pc_desc->scope_decode_offset());
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int ignore_sender = buffer.read_int();
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_method = methodOop(buffer.read_oop());
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_bci = buffer.read_bci();
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}
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methodOop method() { return _method; }
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int bci() { return _bci; }
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};
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// ScopeDescs contain the information that makes source-level debugging of
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// nmethods possible; each scopeDesc describes a method activation
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class ScopeDesc : public ResourceObj {
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public:
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// Constructor
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ScopeDesc(const nmethod* code, int decode_offset, int obj_decode_offset);
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// Calls above, giving default value of "serialized_null" to the
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// "obj_decode_offset" argument. (We don't use a default argument to
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// avoid a .hpp-.hpp dependency.)
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ScopeDesc(const nmethod* code, int decode_offset);
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// JVM state
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methodHandle method() const { return _method; }
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int bci() const { return _bci; }
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GrowableArray<ScopeValue*>* locals();
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GrowableArray<ScopeValue*>* expressions();
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GrowableArray<MonitorValue*>* monitors();
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GrowableArray<ScopeValue*>* objects();
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// Stack walking, returns NULL if this is the outer most scope.
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ScopeDesc* sender() const;
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// Returns where the scope was decoded
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int decode_offset() const { return _decode_offset; }
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// Tells whether sender() returns NULL
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bool is_top() const;
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// Tells whether sd is equal to this
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bool is_equal(ScopeDesc* sd) const;
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private:
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// Alternative constructor
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ScopeDesc(const ScopeDesc* parent);
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// JVM state
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methodHandle _method;
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int _bci;
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// Decoding offsets
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int _decode_offset;
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int _sender_decode_offset;
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int _locals_decode_offset;
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int _expressions_decode_offset;
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int _monitors_decode_offset;
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// Object pool
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GrowableArray<ScopeValue*>* _objects;
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// Nmethod information
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const nmethod* _code;
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// Decoding operations
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void decode_body();
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GrowableArray<ScopeValue*>* decode_scope_values(int decode_offset);
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GrowableArray<MonitorValue*>* decode_monitor_values(int decode_offset);
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GrowableArray<ScopeValue*>* decode_object_values(int decode_offset);
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DebugInfoReadStream* stream_at(int decode_offset) const;
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public:
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// Verification
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void verify();
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#ifndef PRODUCT
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public:
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// Printing support
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void print_on(outputStream* st) const;
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void print_on(outputStream* st, PcDesc* pd) const;
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void print_value_on(outputStream* st) const;
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#endif
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};
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