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/*
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* Copyright 1997-2007 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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// A methodOop represents a Java method.
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//
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// Memory layout (each line represents a word). Note that most applications load thousands of methods,
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// so keeping the size of this structure small has a big impact on footprint.
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//
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// We put all oops and method_size first for better gc cache locality.
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//
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// The actual bytecodes are inlined after the end of the methodOopDesc struct.
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//
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// There are bits in the access_flags telling whether inlined tables are present.
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// Note that accessing the line number and local variable tables is not performance critical at all.
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// Accessing the checked exceptions table is used by reflection, so we put that last to make access
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// to it fast.
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//
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// The line number table is compressed and inlined following the byte codes. It is found as the first
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// byte following the byte codes. The checked exceptions table and the local variable table are inlined
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// after the line number table, and indexed from the end of the method. We do not compress the checked
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// exceptions table since the average length is less than 2, and do not bother to compress the local
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// variable table either since it is mostly absent.
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//
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// Note that native_function and signature_handler has to be at fixed offsets (required by the interpreter)
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//
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// |------------------------------------------------------|
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// | header |
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// | klass |
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// |------------------------------------------------------|
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// | constMethodOop (oop) |
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// | constants (oop) |
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// |------------------------------------------------------|
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// | methodData (oop) |
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// | interp_invocation_count |
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// |------------------------------------------------------|
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// | access_flags |
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// | vtable_index |
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// |------------------------------------------------------|
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// | result_index (C++ interpreter only) |
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// |------------------------------------------------------|
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// | method_size | max_stack |
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// | max_locals | size_of_parameters |
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// |------------------------------------------------------|
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// | intrinsic_id, highest_tier | (unused) |
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// |------------------------------------------------------|
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// | throwout_count | num_breakpoints |
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// |------------------------------------------------------|
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// | invocation_counter |
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// | backedge_counter |
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// |------------------------------------------------------|
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// | code (pointer) |
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// | i2i (pointer) |
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// | adapter (pointer) |
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// | from_compiled_entry (pointer) |
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// | from_interpreted_entry (pointer) |
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// |------------------------------------------------------|
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// | native_function (present only if native) |
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// | signature_handler (present only if native) |
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// |------------------------------------------------------|
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class CheckedExceptionElement;
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class LocalVariableTableElement;
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class AdapterHandlerEntry;
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class methodDataOopDesc;
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class methodOopDesc : public oopDesc {
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friend class methodKlass;
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friend class VMStructs;
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private:
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constMethodOop _constMethod; // Method read-only data.
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constantPoolOop _constants; // Constant pool
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methodDataOop _method_data;
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int _interpreter_invocation_count; // Count of times invoked
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AccessFlags _access_flags; // Access flags
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int _vtable_index; // vtable index of this method (see VtableIndexFlag)
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// note: can have vtables with >2**16 elements (because of inheritance)
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#ifdef CC_INTERP
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int _result_index; // C++ interpreter needs for converting results to/from stack
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#endif
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u2 _method_size; // size of this object
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u2 _max_stack; // Maximum number of entries on the expression stack
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u2 _max_locals; // Number of local variables used by this method
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u2 _size_of_parameters; // size of the parameter block (receiver + arguments) in words
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u1 _intrinsic_id_cache; // Cache for intrinsic_id; 0 or 1+vmInt::ID
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u1 _highest_tier_compile; // Highest compile level this method has ever seen.
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u2 _interpreter_throwout_count; // Count of times method was exited via exception while interpreting
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u2 _number_of_breakpoints; // fullspeed debugging support
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InvocationCounter _invocation_counter; // Incremented before each activation of the method - used to trigger frequency-based optimizations
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InvocationCounter _backedge_counter; // Incremented before each backedge taken - used to trigger frequencey-based optimizations
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#ifndef PRODUCT
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int _compiled_invocation_count; // Number of nmethod invocations so far (for perf. debugging)
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#endif
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// Entry point for calling both from and to the interpreter.
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address _i2i_entry; // All-args-on-stack calling convention
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// Adapter blob (i2c/c2i) for this methodOop. Set once when method is linked.
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AdapterHandlerEntry* _adapter;
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// Entry point for calling from compiled code, to compiled code if it exists
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// or else the interpreter.
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volatile address _from_compiled_entry; // Cache of: _code ? _code->entry_point() : _adapter->c2i_entry()
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// The entry point for calling both from and to compiled code is
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// "_code->entry_point()". Because of tiered compilation and de-opt, this
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// field can come and go. It can transition from NULL to not-null at any
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// time (whenever a compile completes). It can transition from not-null to
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// NULL only at safepoints (because of a de-opt).
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nmethod* volatile _code; // Points to the corresponding piece of native code
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volatile address _from_interpreted_entry; // Cache of _code ? _adapter->i2c_entry() : _i2i_entry
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public:
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// accessors for instance variables
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constMethodOop constMethod() const { return _constMethod; }
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void set_constMethod(constMethodOop xconst) { oop_store_without_check((oop*)&_constMethod, (oop)xconst); }
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static address make_adapters(methodHandle mh, TRAPS);
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volatile address from_compiled_entry() const { return (address)OrderAccess::load_ptr_acquire(&_from_compiled_entry); }
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volatile address from_interpreted_entry() const{ return (address)OrderAccess::load_ptr_acquire(&_from_interpreted_entry); }
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// access flag
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AccessFlags access_flags() const { return _access_flags; }
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void set_access_flags(AccessFlags flags) { _access_flags = flags; }
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// name
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symbolOop name() const { return _constants->symbol_at(name_index()); }
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int name_index() const { return constMethod()->name_index(); }
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void set_name_index(int index) { constMethod()->set_name_index(index); }
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// signature
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symbolOop signature() const { return _constants->symbol_at(signature_index()); }
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int signature_index() const { return constMethod()->signature_index(); }
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void set_signature_index(int index) { constMethod()->set_signature_index(index); }
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// generics support
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symbolOop generic_signature() const { int idx = generic_signature_index(); return ((idx != 0) ? _constants->symbol_at(idx) : (symbolOop)NULL); }
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int generic_signature_index() const { return constMethod()->generic_signature_index(); }
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void set_generic_signature_index(int index) { constMethod()->set_generic_signature_index(index); }
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// annotations support
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typeArrayOop annotations() const { return instanceKlass::cast(method_holder())->get_method_annotations_of(method_idnum()); }
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typeArrayOop parameter_annotations() const { return instanceKlass::cast(method_holder())->get_method_parameter_annotations_of(method_idnum()); }
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typeArrayOop annotation_default() const { return instanceKlass::cast(method_holder())->get_method_default_annotations_of(method_idnum()); }
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#ifdef CC_INTERP
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void set_result_index(BasicType type);
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int result_index() { return _result_index; }
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#endif
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// Helper routine: get klass name + "." + method name + signature as
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// C string, for the purpose of providing more useful NoSuchMethodErrors
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// and fatal error handling. The string is allocated in resource
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// area if a buffer is not provided by the caller.
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char* name_and_sig_as_C_string();
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char* name_and_sig_as_C_string(char* buf, int size);
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// Static routine in the situations we don't have a methodOop
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static char* name_and_sig_as_C_string(Klass* klass, symbolOop method_name, symbolOop signature);
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static char* name_and_sig_as_C_string(Klass* klass, symbolOop method_name, symbolOop signature, char* buf, int size);
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// JVMTI breakpoints
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Bytecodes::Code orig_bytecode_at(int bci);
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void set_orig_bytecode_at(int bci, Bytecodes::Code code);
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void set_breakpoint(int bci);
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void clear_breakpoint(int bci);
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void clear_all_breakpoints();
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// Tracking number of breakpoints, for fullspeed debugging.
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// Only mutated by VM thread.
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u2 number_of_breakpoints() const { return _number_of_breakpoints; }
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void incr_number_of_breakpoints() { ++_number_of_breakpoints; }
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void decr_number_of_breakpoints() { --_number_of_breakpoints; }
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// Initialization only
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void clear_number_of_breakpoints() { _number_of_breakpoints = 0; }
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// index into instanceKlass methods() array
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u2 method_idnum() const { return constMethod()->method_idnum(); }
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void set_method_idnum(u2 idnum) { constMethod()->set_method_idnum(idnum); }
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// code size
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int code_size() const { return constMethod()->code_size(); }
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// method size
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int method_size() const { return _method_size; }
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void set_method_size(int size) {
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assert(0 <= size && size < (1 << 16), "invalid method size");
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_method_size = size;
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}
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// constant pool for klassOop holding this method
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constantPoolOop constants() const { return _constants; }
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void set_constants(constantPoolOop c) { oop_store_without_check((oop*)&_constants, c); }
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// max stack
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int max_stack() const { return _max_stack; }
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void set_max_stack(int size) { _max_stack = size; }
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// max locals
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int max_locals() const { return _max_locals; }
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void set_max_locals(int size) { _max_locals = size; }
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int highest_tier_compile() { return _highest_tier_compile;}
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void set_highest_tier_compile(int level) { _highest_tier_compile = level;}
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void clear_intrinsic_id_cache() { _intrinsic_id_cache = 0; }
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// Count of times method was exited via exception while interpreting
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void interpreter_throwout_increment() {
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if (_interpreter_throwout_count < 65534) {
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_interpreter_throwout_count++;
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}
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}
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int interpreter_throwout_count() const { return _interpreter_throwout_count; }
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void set_interpreter_throwout_count(int count) { _interpreter_throwout_count = count; }
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// size of parameters
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int size_of_parameters() const { return _size_of_parameters; }
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bool has_stackmap_table() const {
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return constMethod()->has_stackmap_table();
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}
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typeArrayOop stackmap_data() const {
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return constMethod()->stackmap_data();
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}
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// exception handler table
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typeArrayOop exception_table() const
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{ return constMethod()->exception_table(); }
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void set_exception_table(typeArrayOop e)
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{ constMethod()->set_exception_table(e); }
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bool has_exception_handler() const
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{ return constMethod()->has_exception_handler(); }
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// Finds the first entry point bci of an exception handler for an
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// exception of klass ex_klass thrown at throw_bci. A value of NULL
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// for ex_klass indicates that the exception klass is not known; in
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// this case it matches any constraint class. Returns -1 if the
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// exception cannot be handled in this method. The handler
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// constraint classes are loaded if necessary. Note that this may
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// throw an exception if loading of the constraint classes causes
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// an IllegalAccessError (bugid 4307310) or an OutOfMemoryError.
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// If an exception is thrown, returns the bci of the
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// exception handler which caused the exception to be thrown, which
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// is needed for proper retries. See, for example,
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// InterpreterRuntime::exception_handler_for_exception.
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int fast_exception_handler_bci_for(KlassHandle ex_klass, int throw_bci, TRAPS);
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// method data access
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methodDataOop method_data() const {
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return _method_data;
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}
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void set_method_data(methodDataOop data) {
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oop_store_without_check((oop*)&_method_data, (oop)data);
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}
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// invocation counter
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InvocationCounter* invocation_counter() { return &_invocation_counter; }
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InvocationCounter* backedge_counter() { return &_backedge_counter; }
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int invocation_count() const { return _invocation_counter.count(); }
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int backedge_count() const { return _backedge_counter.count(); }
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bool was_executed_more_than(int n) const;
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bool was_never_executed() const { return !was_executed_more_than(0); }
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static void build_interpreter_method_data(methodHandle method, TRAPS);
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int interpreter_invocation_count() const { return _interpreter_invocation_count; }
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void set_interpreter_invocation_count(int count) { _interpreter_invocation_count = count; }
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int increment_interpreter_invocation_count() { return ++_interpreter_invocation_count; }
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#ifndef PRODUCT
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int compiled_invocation_count() const { return _compiled_invocation_count; }
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void set_compiled_invocation_count(int count) { _compiled_invocation_count = count; }
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#endif // not PRODUCT
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// Clear (non-shared space) pointers which could not be relevent
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// if this (shared) method were mapped into another JVM.
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void remove_unshareable_info();
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// nmethod/verified compiler entry
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address verified_code_entry();
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bool check_code() const; // Not inline to avoid circular ref
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nmethod* volatile code() const { assert( check_code(), "" ); return (nmethod *)OrderAccess::load_ptr_acquire(&_code); }
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void clear_code(); // Clear out any compiled code
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void set_code(methodHandle mh, nmethod* code);
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void set_adapter_entry(AdapterHandlerEntry* adapter) { _adapter = adapter; }
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address get_i2c_entry();
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address get_c2i_entry();
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address get_c2i_unverified_entry();
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AdapterHandlerEntry* adapter() { return _adapter; }
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// setup entry points
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void link_method(methodHandle method, TRAPS);
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// clear entry points. Used by sharing code
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void unlink_method();
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// vtable index
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enum VtableIndexFlag {
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// Valid vtable indexes are non-negative (>= 0).
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// These few negative values are used as sentinels.
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invalid_vtable_index = -4, // distinct from any valid vtable index
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garbage_vtable_index = -3, // not yet linked; no vtable layout yet
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nonvirtual_vtable_index = -2 // there is no need for vtable dispatch
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// 6330203 Note: Do not use -1, which was overloaded with many meanings.
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};
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DEBUG_ONLY(bool valid_vtable_index() const { return _vtable_index >= nonvirtual_vtable_index; })
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int vtable_index() const { assert(valid_vtable_index(), "");
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return _vtable_index; }
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void set_vtable_index(int index) { _vtable_index = index; }
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// interpreter entry
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address interpreter_entry() const { return _i2i_entry; }
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// Only used when first initialize so we can set _i2i_entry and _from_interpreted_entry
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void set_interpreter_entry(address entry) { _i2i_entry = entry; _from_interpreted_entry = entry; }
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int interpreter_kind(void) {
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return constMethod()->interpreter_kind();
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}
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void set_interpreter_kind();
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void set_interpreter_kind(int kind) {
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constMethod()->set_interpreter_kind(kind);
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}
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// native function (used for native methods only)
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enum {
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native_bind_event_is_interesting = true
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};
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address native_function() const { return *(native_function_addr()); }
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// Must specify a real function (not NULL).
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// Use clear_native_function() to unregister.
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void set_native_function(address function, bool post_event_flag);
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bool has_native_function() const;
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void clear_native_function();
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// signature handler (used for native methods only)
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353 |
address signature_handler() const { return *(signature_handler_addr()); }
|
|
354 |
void set_signature_handler(address handler);
|
|
355 |
|
|
356 |
// Interpreter oopmap support
|
|
357 |
void mask_for(int bci, InterpreterOopMap* mask);
|
|
358 |
|
|
359 |
#ifndef PRODUCT
|
|
360 |
// operations on invocation counter
|
|
361 |
void print_invocation_count() const;
|
|
362 |
#endif
|
|
363 |
|
|
364 |
// byte codes
|
|
365 |
address code_base() const { return constMethod()->code_base(); }
|
|
366 |
bool contains(address bcp) const { return constMethod()->contains(bcp); }
|
|
367 |
|
|
368 |
// prints byte codes
|
|
369 |
void print_codes() const { print_codes_on(tty); }
|
|
370 |
void print_codes_on(outputStream* st) const PRODUCT_RETURN;
|
|
371 |
void print_codes_on(int from, int to, outputStream* st) const PRODUCT_RETURN;
|
|
372 |
|
|
373 |
// checked exceptions
|
|
374 |
int checked_exceptions_length() const
|
|
375 |
{ return constMethod()->checked_exceptions_length(); }
|
|
376 |
CheckedExceptionElement* checked_exceptions_start() const
|
|
377 |
{ return constMethod()->checked_exceptions_start(); }
|
|
378 |
|
|
379 |
// localvariable table
|
|
380 |
bool has_localvariable_table() const
|
|
381 |
{ return constMethod()->has_localvariable_table(); }
|
|
382 |
int localvariable_table_length() const
|
|
383 |
{ return constMethod()->localvariable_table_length(); }
|
|
384 |
LocalVariableTableElement* localvariable_table_start() const
|
|
385 |
{ return constMethod()->localvariable_table_start(); }
|
|
386 |
|
|
387 |
bool has_linenumber_table() const
|
|
388 |
{ return constMethod()->has_linenumber_table(); }
|
|
389 |
u_char* compressed_linenumber_table() const
|
|
390 |
{ return constMethod()->compressed_linenumber_table(); }
|
|
391 |
|
|
392 |
// method holder (the klassOop holding this method)
|
|
393 |
klassOop method_holder() const { return _constants->pool_holder(); }
|
|
394 |
|
|
395 |
void compute_size_of_parameters(Thread *thread); // word size of parameters (receiver if any + arguments)
|
|
396 |
symbolOop klass_name() const; // returns the name of the method holder
|
|
397 |
BasicType result_type() const; // type of the method result
|
|
398 |
int result_type_index() const; // type index of the method result
|
|
399 |
bool is_returning_oop() const { BasicType r = result_type(); return (r == T_OBJECT || r == T_ARRAY); }
|
|
400 |
bool is_returning_fp() const { BasicType r = result_type(); return (r == T_FLOAT || r == T_DOUBLE); }
|
|
401 |
|
|
402 |
// Checked exceptions thrown by this method (resolved to mirrors)
|
|
403 |
objArrayHandle resolved_checked_exceptions(TRAPS) { return resolved_checked_exceptions_impl(this, THREAD); }
|
|
404 |
|
|
405 |
// Access flags
|
|
406 |
bool is_public() const { return access_flags().is_public(); }
|
|
407 |
bool is_private() const { return access_flags().is_private(); }
|
|
408 |
bool is_protected() const { return access_flags().is_protected(); }
|
|
409 |
bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); }
|
|
410 |
bool is_static() const { return access_flags().is_static(); }
|
|
411 |
bool is_final() const { return access_flags().is_final(); }
|
|
412 |
bool is_synchronized() const { return access_flags().is_synchronized();}
|
|
413 |
bool is_native() const { return access_flags().is_native(); }
|
|
414 |
bool is_abstract() const { return access_flags().is_abstract(); }
|
|
415 |
bool is_strict() const { return access_flags().is_strict(); }
|
|
416 |
bool is_synthetic() const { return access_flags().is_synthetic(); }
|
|
417 |
|
|
418 |
// returns true if contains only return operation
|
|
419 |
bool is_empty_method() const;
|
|
420 |
|
|
421 |
// returns true if this is a vanilla constructor
|
|
422 |
bool is_vanilla_constructor() const;
|
|
423 |
|
|
424 |
// checks method and its method holder
|
|
425 |
bool is_final_method() const;
|
|
426 |
bool is_strict_method() const;
|
|
427 |
|
|
428 |
// true if method needs no dynamic dispatch (final and/or no vtable entry)
|
|
429 |
bool can_be_statically_bound() const;
|
|
430 |
|
|
431 |
// returns true if the method has any backward branches.
|
|
432 |
bool has_loops() {
|
|
433 |
return access_flags().loops_flag_init() ? access_flags().has_loops() : compute_has_loops_flag();
|
|
434 |
};
|
|
435 |
|
|
436 |
bool compute_has_loops_flag();
|
|
437 |
|
|
438 |
bool has_jsrs() {
|
|
439 |
return access_flags().has_jsrs();
|
|
440 |
};
|
|
441 |
void set_has_jsrs() {
|
|
442 |
_access_flags.set_has_jsrs();
|
|
443 |
}
|
|
444 |
|
|
445 |
// returns true if the method has any monitors.
|
|
446 |
bool has_monitors() const { return is_synchronized() || access_flags().has_monitor_bytecodes(); }
|
|
447 |
bool has_monitor_bytecodes() const { return access_flags().has_monitor_bytecodes(); }
|
|
448 |
|
|
449 |
void set_has_monitor_bytecodes() { _access_flags.set_has_monitor_bytecodes(); }
|
|
450 |
|
|
451 |
// monitor matching. This returns a conservative estimate of whether the monitorenter/monitorexit bytecodes
|
|
452 |
// propererly nest in the method. It might return false, even though they actually nest properly, since the info.
|
|
453 |
// has not been computed yet.
|
|
454 |
bool guaranteed_monitor_matching() const { return access_flags().is_monitor_matching(); }
|
|
455 |
void set_guaranteed_monitor_matching() { _access_flags.set_monitor_matching(); }
|
|
456 |
|
|
457 |
// returns true if the method is an accessor function (setter/getter).
|
|
458 |
bool is_accessor() const;
|
|
459 |
|
|
460 |
// returns true if the method is an initializer (<init> or <clinit>).
|
|
461 |
bool is_initializer() const;
|
|
462 |
|
|
463 |
// compiled code support
|
|
464 |
// NOTE: code() is inherently racy as deopt can be clearing code
|
|
465 |
// simultaneously. Use with caution.
|
|
466 |
bool has_compiled_code() const { return code() != NULL; }
|
|
467 |
|
|
468 |
// sizing
|
|
469 |
static int object_size(bool is_native);
|
|
470 |
static int header_size() { return sizeof(methodOopDesc)/HeapWordSize; }
|
|
471 |
int object_size() const { return method_size(); }
|
|
472 |
|
|
473 |
bool object_is_parsable() const { return method_size() > 0; }
|
|
474 |
|
|
475 |
// interpreter support
|
|
476 |
static ByteSize const_offset() { return byte_offset_of(methodOopDesc, _constMethod ); }
|
|
477 |
static ByteSize constants_offset() { return byte_offset_of(methodOopDesc, _constants ); }
|
|
478 |
static ByteSize access_flags_offset() { return byte_offset_of(methodOopDesc, _access_flags ); }
|
|
479 |
#ifdef CC_INTERP
|
|
480 |
static ByteSize result_index_offset() { return byte_offset_of(methodOopDesc, _result_index ); }
|
|
481 |
#endif /* CC_INTERP */
|
|
482 |
static ByteSize size_of_locals_offset() { return byte_offset_of(methodOopDesc, _max_locals ); }
|
|
483 |
static ByteSize size_of_parameters_offset() { return byte_offset_of(methodOopDesc, _size_of_parameters); }
|
|
484 |
static ByteSize from_compiled_offset() { return byte_offset_of(methodOopDesc, _from_compiled_entry); }
|
|
485 |
static ByteSize code_offset() { return byte_offset_of(methodOopDesc, _code); }
|
|
486 |
static ByteSize invocation_counter_offset() { return byte_offset_of(methodOopDesc, _invocation_counter); }
|
|
487 |
static ByteSize backedge_counter_offset() { return byte_offset_of(methodOopDesc, _backedge_counter); }
|
|
488 |
static ByteSize method_data_offset() {
|
|
489 |
return byte_offset_of(methodOopDesc, _method_data);
|
|
490 |
}
|
|
491 |
static ByteSize interpreter_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _interpreter_invocation_count); }
|
|
492 |
#ifndef PRODUCT
|
|
493 |
static ByteSize compiled_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _compiled_invocation_count); }
|
|
494 |
#endif // not PRODUCT
|
|
495 |
static ByteSize native_function_offset() { return in_ByteSize(sizeof(methodOopDesc)); }
|
|
496 |
static ByteSize from_interpreted_offset() { return byte_offset_of(methodOopDesc, _from_interpreted_entry ); }
|
|
497 |
static ByteSize interpreter_entry_offset() { return byte_offset_of(methodOopDesc, _i2i_entry ); }
|
|
498 |
static ByteSize signature_handler_offset() { return in_ByteSize(sizeof(methodOopDesc) + wordSize); }
|
|
499 |
static ByteSize max_stack_offset() { return byte_offset_of(methodOopDesc, _max_stack ); }
|
|
500 |
|
|
501 |
// for code generation
|
|
502 |
static int method_data_offset_in_bytes() { return offset_of(methodOopDesc, _method_data); }
|
|
503 |
static int interpreter_invocation_counter_offset_in_bytes()
|
|
504 |
{ return offset_of(methodOopDesc, _interpreter_invocation_count); }
|
|
505 |
|
|
506 |
// Static methods that are used to implement member methods where an exposed this pointer
|
|
507 |
// is needed due to possible GCs
|
|
508 |
static objArrayHandle resolved_checked_exceptions_impl(methodOop this_oop, TRAPS);
|
|
509 |
|
|
510 |
// Returns the byte code index from the byte code pointer
|
|
511 |
int bci_from(address bcp) const;
|
|
512 |
address bcp_from(int bci) const;
|
|
513 |
int validate_bci_from_bcx(intptr_t bcx) const;
|
|
514 |
|
|
515 |
// Returns the line number for a bci if debugging information for the method is prowided,
|
|
516 |
// -1 is returned otherwise.
|
|
517 |
int line_number_from_bci(int bci) const;
|
|
518 |
|
|
519 |
// Reflection support
|
|
520 |
bool is_overridden_in(klassOop k) const;
|
|
521 |
|
|
522 |
// RedefineClasses() support:
|
|
523 |
bool is_old() const { return access_flags().is_old(); }
|
|
524 |
void set_is_old() { _access_flags.set_is_old(); }
|
|
525 |
bool is_obsolete() const { return access_flags().is_obsolete(); }
|
|
526 |
void set_is_obsolete() { _access_flags.set_is_obsolete(); }
|
|
527 |
|
|
528 |
// JVMTI Native method prefixing support:
|
|
529 |
bool is_prefixed_native() const { return access_flags().is_prefixed_native(); }
|
|
530 |
void set_is_prefixed_native() { _access_flags.set_is_prefixed_native(); }
|
|
531 |
|
|
532 |
// Rewriting support
|
|
533 |
static methodHandle clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length,
|
|
534 |
u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS);
|
|
535 |
|
|
536 |
// Get this method's jmethodID -- allocate if it doesn't exist
|
|
537 |
jmethodID jmethod_id() { methodHandle this_h(this);
|
|
538 |
return instanceKlass::jmethod_id_for_impl(method_holder(), this_h); }
|
|
539 |
|
|
540 |
// Lookup the jmethodID for this method. Return NULL if not found.
|
|
541 |
// NOTE that this function can be called from a signal handler
|
|
542 |
// (see AsyncGetCallTrace support for Forte Analyzer) and this
|
|
543 |
// needs to be async-safe. No allocation should be done and
|
|
544 |
// so handles are not used to avoid deadlock.
|
|
545 |
jmethodID find_jmethod_id_or_null() { return instanceKlass::cast(method_holder())->jmethod_id_or_null(this); }
|
|
546 |
|
|
547 |
// JNI static invoke cached itable index accessors
|
|
548 |
int cached_itable_index() { return instanceKlass::cast(method_holder())->cached_itable_index(method_idnum()); }
|
|
549 |
void set_cached_itable_index(int index) { instanceKlass::cast(method_holder())->set_cached_itable_index(method_idnum(), index); }
|
|
550 |
|
|
551 |
// Support for inlining of intrinsic methods
|
|
552 |
vmIntrinsics::ID intrinsic_id() const { // returns zero if not an intrinsic
|
|
553 |
const u1& cache = _intrinsic_id_cache;
|
|
554 |
if (cache != 0) {
|
|
555 |
return (vmIntrinsics::ID)(cache - 1);
|
|
556 |
} else {
|
|
557 |
vmIntrinsics::ID id = compute_intrinsic_id();
|
|
558 |
*(u1*)&cache = ((u1) id) + 1; // force the cache to be non-const
|
|
559 |
vmIntrinsics::verify_method(id, (methodOop) this);
|
|
560 |
assert((vmIntrinsics::ID)(cache - 1) == id, "proper conversion");
|
|
561 |
return id;
|
|
562 |
}
|
|
563 |
}
|
|
564 |
|
|
565 |
// On-stack replacement support
|
|
566 |
bool has_osr_nmethod() { return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, InvocationEntryBci) != NULL; }
|
|
567 |
nmethod* lookup_osr_nmethod_for(int bci) { return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, bci); }
|
|
568 |
|
|
569 |
// Inline cache support
|
|
570 |
void cleanup_inline_caches();
|
|
571 |
|
|
572 |
// Find if klass for method is loaded
|
|
573 |
bool is_klass_loaded_by_klass_index(int klass_index) const;
|
|
574 |
bool is_klass_loaded(int refinfo_index, bool must_be_resolved = false) const;
|
|
575 |
|
|
576 |
// Indicates whether compilation failed earlier for this method, or
|
|
577 |
// whether it is not compilable for another reason like having a
|
|
578 |
// breakpoint set in it.
|
|
579 |
bool is_not_compilable(int comp_level = CompLevel_highest_tier) const;
|
|
580 |
void set_not_compilable(int comp_level = CompLevel_highest_tier);
|
|
581 |
|
|
582 |
bool is_not_osr_compilable() const { return is_not_compilable() || access_flags().is_not_osr_compilable(); }
|
|
583 |
void set_not_osr_compilable() { _access_flags.set_not_osr_compilable(); }
|
|
584 |
|
|
585 |
bool is_not_tier1_compilable() const { return access_flags().is_not_tier1_compilable(); }
|
|
586 |
void set_not_tier1_compilable() { _access_flags.set_not_tier1_compilable(); }
|
|
587 |
|
|
588 |
// Background compilation support
|
|
589 |
bool queued_for_compilation() const { return access_flags().queued_for_compilation(); }
|
|
590 |
void set_queued_for_compilation() { _access_flags.set_queued_for_compilation(); }
|
|
591 |
void clear_queued_for_compilation() { _access_flags.clear_queued_for_compilation(); }
|
|
592 |
|
|
593 |
static methodOop method_from_bcp(address bcp);
|
|
594 |
|
|
595 |
// Resolve all classes in signature, return 'true' if successful
|
|
596 |
static bool load_signature_classes(methodHandle m, TRAPS);
|
|
597 |
|
|
598 |
// Return if true if not all classes references in signature, including return type, has been loaded
|
|
599 |
static bool has_unloaded_classes_in_signature(methodHandle m, TRAPS);
|
|
600 |
|
|
601 |
// Printing
|
|
602 |
void print_short_name(outputStream* st) /*PRODUCT_RETURN*/; // prints as klassname::methodname; Exposed so field engineers can debug VM
|
|
603 |
void print_name(outputStream* st) PRODUCT_RETURN; // prints as "virtual void foo(int)"
|
|
604 |
|
|
605 |
// Helper routine used for method sorting
|
|
606 |
static void sort_methods(objArrayOop methods,
|
|
607 |
objArrayOop methods_annotations,
|
|
608 |
objArrayOop methods_parameter_annotations,
|
|
609 |
objArrayOop methods_default_annotations,
|
|
610 |
bool idempotent = false);
|
|
611 |
|
|
612 |
// size of parameters
|
|
613 |
void set_size_of_parameters(int size) { _size_of_parameters = size; }
|
|
614 |
private:
|
|
615 |
|
|
616 |
// Helper routine for intrinsic_id().
|
|
617 |
vmIntrinsics::ID compute_intrinsic_id() const;
|
|
618 |
|
|
619 |
// Inlined elements
|
|
620 |
address* native_function_addr() const { assert(is_native(), "must be native"); return (address*) (this+1); }
|
|
621 |
address* signature_handler_addr() const { return native_function_addr() + 1; }
|
|
622 |
|
|
623 |
// Garbage collection support
|
|
624 |
oop* adr_constMethod() const { return (oop*)&_constMethod; }
|
|
625 |
oop* adr_constants() const { return (oop*)&_constants; }
|
|
626 |
oop* adr_method_data() const { return (oop*)&_method_data; }
|
|
627 |
};
|
|
628 |
|
|
629 |
|
|
630 |
// Utility class for compressing line number tables
|
|
631 |
|
|
632 |
class CompressedLineNumberWriteStream: public CompressedWriteStream {
|
|
633 |
private:
|
|
634 |
int _bci;
|
|
635 |
int _line;
|
|
636 |
public:
|
|
637 |
// Constructor
|
|
638 |
CompressedLineNumberWriteStream(int initial_size) : CompressedWriteStream(initial_size), _bci(0), _line(0) {}
|
|
639 |
CompressedLineNumberWriteStream(u_char* buffer, int initial_size) : CompressedWriteStream(buffer, initial_size), _bci(0), _line(0) {}
|
|
640 |
|
|
641 |
// Write (bci, line number) pair to stream
|
|
642 |
void write_pair_regular(int bci_delta, int line_delta);
|
|
643 |
|
|
644 |
inline void write_pair_inline(int bci, int line) {
|
|
645 |
int bci_delta = bci - _bci;
|
|
646 |
int line_delta = line - _line;
|
|
647 |
_bci = bci;
|
|
648 |
_line = line;
|
|
649 |
// Skip (0,0) deltas - they do not add information and conflict with terminator.
|
|
650 |
if (bci_delta == 0 && line_delta == 0) return;
|
|
651 |
// Check if bci is 5-bit and line number 3-bit unsigned.
|
|
652 |
if (((bci_delta & ~0x1F) == 0) && ((line_delta & ~0x7) == 0)) {
|
|
653 |
// Compress into single byte.
|
|
654 |
jubyte value = ((jubyte) bci_delta << 3) | (jubyte) line_delta;
|
|
655 |
// Check that value doesn't match escape character.
|
|
656 |
if (value != 0xFF) {
|
|
657 |
write_byte(value);
|
|
658 |
return;
|
|
659 |
}
|
|
660 |
}
|
|
661 |
write_pair_regular(bci_delta, line_delta);
|
|
662 |
}
|
|
663 |
|
|
664 |
// Windows AMD64 + Apr 2005 PSDK with /O2 generates bad code for write_pair.
|
|
665 |
// Disabling optimization doesn't work for methods in header files
|
|
666 |
// so we force it to call through the non-optimized version in the .cpp.
|
|
667 |
// It's gross, but it's the only way we can ensure that all callers are
|
|
668 |
// fixed. MSC_VER is defined in build/windows/makefiles/compile.make.
|
|
669 |
#if defined(_M_AMD64) && MSC_VER >= 1400
|
|
670 |
void write_pair(int bci, int line);
|
|
671 |
#else
|
|
672 |
void write_pair(int bci, int line) { write_pair_inline(bci, line); }
|
|
673 |
#endif
|
|
674 |
|
|
675 |
// Write end-of-stream marker
|
|
676 |
void write_terminator() { write_byte(0); }
|
|
677 |
};
|
|
678 |
|
|
679 |
|
|
680 |
// Utility class for decompressing line number tables
|
|
681 |
|
|
682 |
class CompressedLineNumberReadStream: public CompressedReadStream {
|
|
683 |
private:
|
|
684 |
int _bci;
|
|
685 |
int _line;
|
|
686 |
public:
|
|
687 |
// Constructor
|
|
688 |
CompressedLineNumberReadStream(u_char* buffer);
|
|
689 |
// Read (bci, line number) pair from stream. Returns false at end-of-stream.
|
|
690 |
bool read_pair();
|
|
691 |
// Accessing bci and line number (after calling read_pair)
|
|
692 |
int bci() const { return _bci; }
|
|
693 |
int line() const { return _line; }
|
|
694 |
};
|
|
695 |
|
|
696 |
|
|
697 |
/// Fast Breakpoints.
|
|
698 |
|
|
699 |
// If this structure gets more complicated (because bpts get numerous),
|
|
700 |
// move it into its own header.
|
|
701 |
|
|
702 |
// There is presently no provision for concurrent access
|
|
703 |
// to breakpoint lists, which is only OK for JVMTI because
|
|
704 |
// breakpoints are written only at safepoints, and are read
|
|
705 |
// concurrently only outside of safepoints.
|
|
706 |
|
|
707 |
class BreakpointInfo : public CHeapObj {
|
|
708 |
friend class VMStructs;
|
|
709 |
private:
|
|
710 |
Bytecodes::Code _orig_bytecode;
|
|
711 |
int _bci;
|
|
712 |
u2 _name_index; // of method
|
|
713 |
u2 _signature_index; // of method
|
|
714 |
BreakpointInfo* _next; // simple storage allocation
|
|
715 |
|
|
716 |
public:
|
|
717 |
BreakpointInfo(methodOop m, int bci);
|
|
718 |
|
|
719 |
// accessors
|
|
720 |
Bytecodes::Code orig_bytecode() { return _orig_bytecode; }
|
|
721 |
void set_orig_bytecode(Bytecodes::Code code) { _orig_bytecode = code; }
|
|
722 |
int bci() { return _bci; }
|
|
723 |
|
|
724 |
BreakpointInfo* next() const { return _next; }
|
|
725 |
void set_next(BreakpointInfo* n) { _next = n; }
|
|
726 |
|
|
727 |
// helps for searchers
|
|
728 |
bool match(methodOop m, int bci) {
|
|
729 |
return bci == _bci && match(m);
|
|
730 |
}
|
|
731 |
|
|
732 |
bool match(methodOop m) {
|
|
733 |
return _name_index == m->name_index() &&
|
|
734 |
_signature_index == m->signature_index();
|
|
735 |
}
|
|
736 |
|
|
737 |
void set(methodOop method);
|
|
738 |
void clear(methodOop method);
|
|
739 |
};
|