author | jrose |
Tue, 21 Apr 2009 23:21:04 -0700 | |
changeset 2570 | ecc7862946d4 |
parent 2534 | 08dac9ce0cd7 |
child 3273 | 6acf7084b1d3 |
permissions | -rw-r--r-- |
1 | 1 |
/* |
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* Copyright 1997-2009 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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6692899: CMS: many vm.parallel_class_loading tests fail with assert "missing Printezis mark"
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static const bool IsUnsafeConc = false; |
5c343868d071
6692899: CMS: many vm.parallel_class_loading tests fail with assert "missing Printezis mark"
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parents:
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static const bool IsSafeConc = true; |
5c343868d071
6692899: CMS: many vm.parallel_class_loading tests fail with assert "missing Printezis mark"
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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 relevant |
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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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highest_unused_vtable_index_value = -5, |
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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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342 |
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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350 |
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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357 |
// signature handler (used for native methods only) |
|
358 |
address signature_handler() const { return *(signature_handler_addr()); } |
|
359 |
void set_signature_handler(address handler); |
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360 |
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// Interpreter oopmap support |
|
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void mask_for(int bci, InterpreterOopMap* mask); |
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363 |
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#ifndef PRODUCT |
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// operations on invocation counter |
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366 |
void print_invocation_count() const; |
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#endif |
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368 |
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369 |
// byte codes |
|
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address code_base() const { return constMethod()->code_base(); } |
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bool contains(address bcp) const { return constMethod()->contains(bcp); } |
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372 |
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// prints byte codes |
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void print_codes() const { print_codes_on(tty); } |
|
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void print_codes_on(outputStream* st) const PRODUCT_RETURN; |
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void print_codes_on(int from, int to, outputStream* st) const PRODUCT_RETURN; |
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378 |
// checked exceptions |
|
379 |
int checked_exceptions_length() const |
|
380 |
{ return constMethod()->checked_exceptions_length(); } |
|
381 |
CheckedExceptionElement* checked_exceptions_start() const |
|
382 |
{ return constMethod()->checked_exceptions_start(); } |
|
383 |
||
384 |
// localvariable table |
|
385 |
bool has_localvariable_table() const |
|
386 |
{ return constMethod()->has_localvariable_table(); } |
|
387 |
int localvariable_table_length() const |
|
388 |
{ return constMethod()->localvariable_table_length(); } |
|
389 |
LocalVariableTableElement* localvariable_table_start() const |
|
390 |
{ return constMethod()->localvariable_table_start(); } |
|
391 |
||
392 |
bool has_linenumber_table() const |
|
393 |
{ return constMethod()->has_linenumber_table(); } |
|
394 |
u_char* compressed_linenumber_table() const |
|
395 |
{ return constMethod()->compressed_linenumber_table(); } |
|
396 |
||
397 |
// method holder (the klassOop holding this method) |
|
398 |
klassOop method_holder() const { return _constants->pool_holder(); } |
|
399 |
||
400 |
void compute_size_of_parameters(Thread *thread); // word size of parameters (receiver if any + arguments) |
|
401 |
symbolOop klass_name() const; // returns the name of the method holder |
|
402 |
BasicType result_type() const; // type of the method result |
|
403 |
int result_type_index() const; // type index of the method result |
|
404 |
bool is_returning_oop() const { BasicType r = result_type(); return (r == T_OBJECT || r == T_ARRAY); } |
|
405 |
bool is_returning_fp() const { BasicType r = result_type(); return (r == T_FLOAT || r == T_DOUBLE); } |
|
406 |
||
407 |
// Checked exceptions thrown by this method (resolved to mirrors) |
|
408 |
objArrayHandle resolved_checked_exceptions(TRAPS) { return resolved_checked_exceptions_impl(this, THREAD); } |
|
409 |
||
410 |
// Access flags |
|
411 |
bool is_public() const { return access_flags().is_public(); } |
|
412 |
bool is_private() const { return access_flags().is_private(); } |
|
413 |
bool is_protected() const { return access_flags().is_protected(); } |
|
414 |
bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); } |
|
415 |
bool is_static() const { return access_flags().is_static(); } |
|
416 |
bool is_final() const { return access_flags().is_final(); } |
|
417 |
bool is_synchronized() const { return access_flags().is_synchronized();} |
|
418 |
bool is_native() const { return access_flags().is_native(); } |
|
419 |
bool is_abstract() const { return access_flags().is_abstract(); } |
|
420 |
bool is_strict() const { return access_flags().is_strict(); } |
|
421 |
bool is_synthetic() const { return access_flags().is_synthetic(); } |
|
422 |
||
423 |
// returns true if contains only return operation |
|
424 |
bool is_empty_method() const; |
|
425 |
||
426 |
// returns true if this is a vanilla constructor |
|
427 |
bool is_vanilla_constructor() const; |
|
428 |
||
429 |
// checks method and its method holder |
|
430 |
bool is_final_method() const; |
|
431 |
bool is_strict_method() const; |
|
432 |
||
433 |
// true if method needs no dynamic dispatch (final and/or no vtable entry) |
|
434 |
bool can_be_statically_bound() const; |
|
435 |
||
436 |
// returns true if the method has any backward branches. |
|
437 |
bool has_loops() { |
|
438 |
return access_flags().loops_flag_init() ? access_flags().has_loops() : compute_has_loops_flag(); |
|
439 |
}; |
|
440 |
||
441 |
bool compute_has_loops_flag(); |
|
442 |
||
443 |
bool has_jsrs() { |
|
444 |
return access_flags().has_jsrs(); |
|
445 |
}; |
|
446 |
void set_has_jsrs() { |
|
447 |
_access_flags.set_has_jsrs(); |
|
448 |
} |
|
449 |
||
450 |
// returns true if the method has any monitors. |
|
451 |
bool has_monitors() const { return is_synchronized() || access_flags().has_monitor_bytecodes(); } |
|
452 |
bool has_monitor_bytecodes() const { return access_flags().has_monitor_bytecodes(); } |
|
453 |
||
454 |
void set_has_monitor_bytecodes() { _access_flags.set_has_monitor_bytecodes(); } |
|
455 |
||
456 |
// monitor matching. This returns a conservative estimate of whether the monitorenter/monitorexit bytecodes |
|
457 |
// propererly nest in the method. It might return false, even though they actually nest properly, since the info. |
|
458 |
// has not been computed yet. |
|
459 |
bool guaranteed_monitor_matching() const { return access_flags().is_monitor_matching(); } |
|
460 |
void set_guaranteed_monitor_matching() { _access_flags.set_monitor_matching(); } |
|
461 |
||
462 |
// returns true if the method is an accessor function (setter/getter). |
|
463 |
bool is_accessor() const; |
|
464 |
||
465 |
// returns true if the method is an initializer (<init> or <clinit>). |
|
466 |
bool is_initializer() const; |
|
467 |
||
468 |
// compiled code support |
|
469 |
// NOTE: code() is inherently racy as deopt can be clearing code |
|
470 |
// simultaneously. Use with caution. |
|
471 |
bool has_compiled_code() const { return code() != NULL; } |
|
472 |
||
473 |
// sizing |
|
474 |
static int object_size(bool is_native); |
|
475 |
static int header_size() { return sizeof(methodOopDesc)/HeapWordSize; } |
|
476 |
int object_size() const { return method_size(); } |
|
477 |
||
478 |
bool object_is_parsable() const { return method_size() > 0; } |
|
479 |
||
480 |
// interpreter support |
|
481 |
static ByteSize const_offset() { return byte_offset_of(methodOopDesc, _constMethod ); } |
|
482 |
static ByteSize constants_offset() { return byte_offset_of(methodOopDesc, _constants ); } |
|
483 |
static ByteSize access_flags_offset() { return byte_offset_of(methodOopDesc, _access_flags ); } |
|
484 |
#ifdef CC_INTERP |
|
485 |
static ByteSize result_index_offset() { return byte_offset_of(methodOopDesc, _result_index ); } |
|
486 |
#endif /* CC_INTERP */ |
|
487 |
static ByteSize size_of_locals_offset() { return byte_offset_of(methodOopDesc, _max_locals ); } |
|
488 |
static ByteSize size_of_parameters_offset() { return byte_offset_of(methodOopDesc, _size_of_parameters); } |
|
489 |
static ByteSize from_compiled_offset() { return byte_offset_of(methodOopDesc, _from_compiled_entry); } |
|
490 |
static ByteSize code_offset() { return byte_offset_of(methodOopDesc, _code); } |
|
491 |
static ByteSize invocation_counter_offset() { return byte_offset_of(methodOopDesc, _invocation_counter); } |
|
492 |
static ByteSize backedge_counter_offset() { return byte_offset_of(methodOopDesc, _backedge_counter); } |
|
493 |
static ByteSize method_data_offset() { |
|
494 |
return byte_offset_of(methodOopDesc, _method_data); |
|
495 |
} |
|
496 |
static ByteSize interpreter_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _interpreter_invocation_count); } |
|
497 |
#ifndef PRODUCT |
|
498 |
static ByteSize compiled_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _compiled_invocation_count); } |
|
499 |
#endif // not PRODUCT |
|
500 |
static ByteSize native_function_offset() { return in_ByteSize(sizeof(methodOopDesc)); } |
|
501 |
static ByteSize from_interpreted_offset() { return byte_offset_of(methodOopDesc, _from_interpreted_entry ); } |
|
502 |
static ByteSize interpreter_entry_offset() { return byte_offset_of(methodOopDesc, _i2i_entry ); } |
|
503 |
static ByteSize signature_handler_offset() { return in_ByteSize(sizeof(methodOopDesc) + wordSize); } |
|
504 |
static ByteSize max_stack_offset() { return byte_offset_of(methodOopDesc, _max_stack ); } |
|
505 |
||
506 |
// for code generation |
|
507 |
static int method_data_offset_in_bytes() { return offset_of(methodOopDesc, _method_data); } |
|
508 |
static int interpreter_invocation_counter_offset_in_bytes() |
|
509 |
{ return offset_of(methodOopDesc, _interpreter_invocation_count); } |
|
510 |
||
511 |
// Static methods that are used to implement member methods where an exposed this pointer |
|
512 |
// is needed due to possible GCs |
|
513 |
static objArrayHandle resolved_checked_exceptions_impl(methodOop this_oop, TRAPS); |
|
514 |
||
515 |
// Returns the byte code index from the byte code pointer |
|
516 |
int bci_from(address bcp) const; |
|
517 |
address bcp_from(int bci) const; |
|
518 |
int validate_bci_from_bcx(intptr_t bcx) const; |
|
519 |
||
520 |
// Returns the line number for a bci if debugging information for the method is prowided, |
|
521 |
// -1 is returned otherwise. |
|
522 |
int line_number_from_bci(int bci) const; |
|
523 |
||
524 |
// Reflection support |
|
525 |
bool is_overridden_in(klassOop k) const; |
|
526 |
||
2534 | 527 |
// JSR 292 support |
528 |
bool is_method_handle_invoke() const { return access_flags().is_method_handle_invoke(); } |
|
529 |
static methodHandle make_invoke_method(KlassHandle holder, |
|
530 |
symbolHandle signature, |
|
531 |
Handle method_type, |
|
532 |
TRAPS); |
|
533 |
// these operate only on invoke methods: |
|
534 |
oop method_handle_type() const; |
|
535 |
static jint* method_type_offsets_chain(); // series of pointer-offsets, terminated by -1 |
|
536 |
// presize interpreter frames for extra interpreter stack entries, if needed |
|
2570
ecc7862946d4
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
2534
diff
changeset
|
537 |
// method handles want to be able to push a few extra values (e.g., a bound receiver), and |
ecc7862946d4
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
2534
diff
changeset
|
538 |
// invokedynamic sometimes needs to push a bootstrap method, call site, and arglist, |
ecc7862946d4
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
2534
diff
changeset
|
539 |
// all without checking for a stack overflow |
ecc7862946d4
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
2534
diff
changeset
|
540 |
static int extra_stack_entries() { return (EnableMethodHandles ? (int)MethodHandlePushLimit : 0) + (EnableInvokeDynamic ? 3 : 0); } |
2534 | 541 |
static int extra_stack_words(); // = extra_stack_entries() * Interpreter::stackElementSize() |
1 | 542 |
// RedefineClasses() support: |
543 |
bool is_old() const { return access_flags().is_old(); } |
|
544 |
void set_is_old() { _access_flags.set_is_old(); } |
|
545 |
bool is_obsolete() const { return access_flags().is_obsolete(); } |
|
546 |
void set_is_obsolete() { _access_flags.set_is_obsolete(); } |
|
221
ec745a0fe922
6599425: 4/3 OopMapCache::lookup() can cause later crash or assert() failure
dcubed
parents:
1
diff
changeset
|
547 |
// see the definition in methodOop.cpp for the gory details |
ec745a0fe922
6599425: 4/3 OopMapCache::lookup() can cause later crash or assert() failure
dcubed
parents:
1
diff
changeset
|
548 |
bool should_not_be_cached() const; |
1 | 549 |
|
550 |
// JVMTI Native method prefixing support: |
|
551 |
bool is_prefixed_native() const { return access_flags().is_prefixed_native(); } |
|
552 |
void set_is_prefixed_native() { _access_flags.set_is_prefixed_native(); } |
|
553 |
||
554 |
// Rewriting support |
|
555 |
static methodHandle clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length, |
|
556 |
u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS); |
|
557 |
||
558 |
// Get this method's jmethodID -- allocate if it doesn't exist |
|
559 |
jmethodID jmethod_id() { methodHandle this_h(this); |
|
560 |
return instanceKlass::jmethod_id_for_impl(method_holder(), this_h); } |
|
561 |
||
562 |
// Lookup the jmethodID for this method. Return NULL if not found. |
|
563 |
// NOTE that this function can be called from a signal handler |
|
564 |
// (see AsyncGetCallTrace support for Forte Analyzer) and this |
|
565 |
// needs to be async-safe. No allocation should be done and |
|
566 |
// so handles are not used to avoid deadlock. |
|
567 |
jmethodID find_jmethod_id_or_null() { return instanceKlass::cast(method_holder())->jmethod_id_or_null(this); } |
|
568 |
||
569 |
// JNI static invoke cached itable index accessors |
|
570 |
int cached_itable_index() { return instanceKlass::cast(method_holder())->cached_itable_index(method_idnum()); } |
|
571 |
void set_cached_itable_index(int index) { instanceKlass::cast(method_holder())->set_cached_itable_index(method_idnum(), index); } |
|
572 |
||
573 |
// Support for inlining of intrinsic methods |
|
574 |
vmIntrinsics::ID intrinsic_id() const { // returns zero if not an intrinsic |
|
575 |
const u1& cache = _intrinsic_id_cache; |
|
576 |
if (cache != 0) { |
|
577 |
return (vmIntrinsics::ID)(cache - 1); |
|
578 |
} else { |
|
579 |
vmIntrinsics::ID id = compute_intrinsic_id(); |
|
580 |
*(u1*)&cache = ((u1) id) + 1; // force the cache to be non-const |
|
581 |
vmIntrinsics::verify_method(id, (methodOop) this); |
|
582 |
assert((vmIntrinsics::ID)(cache - 1) == id, "proper conversion"); |
|
583 |
return id; |
|
584 |
} |
|
585 |
} |
|
586 |
||
587 |
// On-stack replacement support |
|
588 |
bool has_osr_nmethod() { return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, InvocationEntryBci) != NULL; } |
|
589 |
nmethod* lookup_osr_nmethod_for(int bci) { return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, bci); } |
|
590 |
||
591 |
// Inline cache support |
|
592 |
void cleanup_inline_caches(); |
|
593 |
||
594 |
// Find if klass for method is loaded |
|
595 |
bool is_klass_loaded_by_klass_index(int klass_index) const; |
|
596 |
bool is_klass_loaded(int refinfo_index, bool must_be_resolved = false) const; |
|
597 |
||
598 |
// Indicates whether compilation failed earlier for this method, or |
|
599 |
// whether it is not compilable for another reason like having a |
|
600 |
// breakpoint set in it. |
|
601 |
bool is_not_compilable(int comp_level = CompLevel_highest_tier) const; |
|
602 |
void set_not_compilable(int comp_level = CompLevel_highest_tier); |
|
603 |
||
604 |
bool is_not_osr_compilable() const { return is_not_compilable() || access_flags().is_not_osr_compilable(); } |
|
605 |
void set_not_osr_compilable() { _access_flags.set_not_osr_compilable(); } |
|
606 |
||
607 |
bool is_not_tier1_compilable() const { return access_flags().is_not_tier1_compilable(); } |
|
608 |
void set_not_tier1_compilable() { _access_flags.set_not_tier1_compilable(); } |
|
609 |
||
610 |
// Background compilation support |
|
611 |
bool queued_for_compilation() const { return access_flags().queued_for_compilation(); } |
|
612 |
void set_queued_for_compilation() { _access_flags.set_queued_for_compilation(); } |
|
613 |
void clear_queued_for_compilation() { _access_flags.clear_queued_for_compilation(); } |
|
614 |
||
615 |
static methodOop method_from_bcp(address bcp); |
|
616 |
||
617 |
// Resolve all classes in signature, return 'true' if successful |
|
618 |
static bool load_signature_classes(methodHandle m, TRAPS); |
|
619 |
||
620 |
// Return if true if not all classes references in signature, including return type, has been loaded |
|
621 |
static bool has_unloaded_classes_in_signature(methodHandle m, TRAPS); |
|
622 |
||
623 |
// Printing |
|
624 |
void print_short_name(outputStream* st) /*PRODUCT_RETURN*/; // prints as klassname::methodname; Exposed so field engineers can debug VM |
|
625 |
void print_name(outputStream* st) PRODUCT_RETURN; // prints as "virtual void foo(int)" |
|
626 |
||
627 |
// Helper routine used for method sorting |
|
628 |
static void sort_methods(objArrayOop methods, |
|
629 |
objArrayOop methods_annotations, |
|
630 |
objArrayOop methods_parameter_annotations, |
|
631 |
objArrayOop methods_default_annotations, |
|
632 |
bool idempotent = false); |
|
633 |
||
634 |
// size of parameters |
|
635 |
void set_size_of_parameters(int size) { _size_of_parameters = size; } |
|
636 |
private: |
|
637 |
||
638 |
// Helper routine for intrinsic_id(). |
|
639 |
vmIntrinsics::ID compute_intrinsic_id() const; |
|
640 |
||
641 |
// Inlined elements |
|
642 |
address* native_function_addr() const { assert(is_native(), "must be native"); return (address*) (this+1); } |
|
643 |
address* signature_handler_addr() const { return native_function_addr() + 1; } |
|
644 |
||
645 |
// Garbage collection support |
|
646 |
oop* adr_constMethod() const { return (oop*)&_constMethod; } |
|
647 |
oop* adr_constants() const { return (oop*)&_constants; } |
|
648 |
oop* adr_method_data() const { return (oop*)&_method_data; } |
|
649 |
}; |
|
650 |
||
651 |
||
652 |
// Utility class for compressing line number tables |
|
653 |
||
654 |
class CompressedLineNumberWriteStream: public CompressedWriteStream { |
|
655 |
private: |
|
656 |
int _bci; |
|
657 |
int _line; |
|
658 |
public: |
|
659 |
// Constructor |
|
660 |
CompressedLineNumberWriteStream(int initial_size) : CompressedWriteStream(initial_size), _bci(0), _line(0) {} |
|
661 |
CompressedLineNumberWriteStream(u_char* buffer, int initial_size) : CompressedWriteStream(buffer, initial_size), _bci(0), _line(0) {} |
|
662 |
||
663 |
// Write (bci, line number) pair to stream |
|
664 |
void write_pair_regular(int bci_delta, int line_delta); |
|
665 |
||
666 |
inline void write_pair_inline(int bci, int line) { |
|
667 |
int bci_delta = bci - _bci; |
|
668 |
int line_delta = line - _line; |
|
669 |
_bci = bci; |
|
670 |
_line = line; |
|
671 |
// Skip (0,0) deltas - they do not add information and conflict with terminator. |
|
672 |
if (bci_delta == 0 && line_delta == 0) return; |
|
673 |
// Check if bci is 5-bit and line number 3-bit unsigned. |
|
674 |
if (((bci_delta & ~0x1F) == 0) && ((line_delta & ~0x7) == 0)) { |
|
675 |
// Compress into single byte. |
|
676 |
jubyte value = ((jubyte) bci_delta << 3) | (jubyte) line_delta; |
|
677 |
// Check that value doesn't match escape character. |
|
678 |
if (value != 0xFF) { |
|
679 |
write_byte(value); |
|
680 |
return; |
|
681 |
} |
|
682 |
} |
|
683 |
write_pair_regular(bci_delta, line_delta); |
|
684 |
} |
|
685 |
||
686 |
// Windows AMD64 + Apr 2005 PSDK with /O2 generates bad code for write_pair. |
|
687 |
// Disabling optimization doesn't work for methods in header files |
|
688 |
// so we force it to call through the non-optimized version in the .cpp. |
|
689 |
// It's gross, but it's the only way we can ensure that all callers are |
|
690 |
// fixed. MSC_VER is defined in build/windows/makefiles/compile.make. |
|
691 |
#if defined(_M_AMD64) && MSC_VER >= 1400 |
|
692 |
void write_pair(int bci, int line); |
|
693 |
#else |
|
694 |
void write_pair(int bci, int line) { write_pair_inline(bci, line); } |
|
695 |
#endif |
|
696 |
||
697 |
// Write end-of-stream marker |
|
698 |
void write_terminator() { write_byte(0); } |
|
699 |
}; |
|
700 |
||
701 |
||
702 |
// Utility class for decompressing line number tables |
|
703 |
||
704 |
class CompressedLineNumberReadStream: public CompressedReadStream { |
|
705 |
private: |
|
706 |
int _bci; |
|
707 |
int _line; |
|
708 |
public: |
|
709 |
// Constructor |
|
710 |
CompressedLineNumberReadStream(u_char* buffer); |
|
711 |
// Read (bci, line number) pair from stream. Returns false at end-of-stream. |
|
712 |
bool read_pair(); |
|
713 |
// Accessing bci and line number (after calling read_pair) |
|
714 |
int bci() const { return _bci; } |
|
715 |
int line() const { return _line; } |
|
716 |
}; |
|
717 |
||
718 |
||
719 |
/// Fast Breakpoints. |
|
720 |
||
721 |
// If this structure gets more complicated (because bpts get numerous), |
|
722 |
// move it into its own header. |
|
723 |
||
724 |
// There is presently no provision for concurrent access |
|
725 |
// to breakpoint lists, which is only OK for JVMTI because |
|
726 |
// breakpoints are written only at safepoints, and are read |
|
727 |
// concurrently only outside of safepoints. |
|
728 |
||
729 |
class BreakpointInfo : public CHeapObj { |
|
730 |
friend class VMStructs; |
|
731 |
private: |
|
732 |
Bytecodes::Code _orig_bytecode; |
|
733 |
int _bci; |
|
734 |
u2 _name_index; // of method |
|
735 |
u2 _signature_index; // of method |
|
736 |
BreakpointInfo* _next; // simple storage allocation |
|
737 |
||
738 |
public: |
|
739 |
BreakpointInfo(methodOop m, int bci); |
|
740 |
||
741 |
// accessors |
|
742 |
Bytecodes::Code orig_bytecode() { return _orig_bytecode; } |
|
743 |
void set_orig_bytecode(Bytecodes::Code code) { _orig_bytecode = code; } |
|
744 |
int bci() { return _bci; } |
|
745 |
||
746 |
BreakpointInfo* next() const { return _next; } |
|
747 |
void set_next(BreakpointInfo* n) { _next = n; } |
|
748 |
||
749 |
// helps for searchers |
|
750 |
bool match(methodOop m, int bci) { |
|
751 |
return bci == _bci && match(m); |
|
752 |
} |
|
753 |
||
754 |
bool match(methodOop m) { |
|
755 |
return _name_index == m->name_index() && |
|
756 |
_signature_index == m->signature_index(); |
|
757 |
} |
|
758 |
||
759 |
void set(methodOop method); |
|
760 |
void clear(methodOop method); |
|
761 |
}; |