| /* |
| * Copyright 1997-2009 Sun Microsystems, Inc. All Rights Reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| * |
| */ |
| |
| // A methodOop represents a Java method. |
| // |
| // Memory layout (each line represents a word). Note that most applications load thousands of methods, |
| // so keeping the size of this structure small has a big impact on footprint. |
| // |
| // We put all oops and method_size first for better gc cache locality. |
| // |
| // The actual bytecodes are inlined after the end of the methodOopDesc struct. |
| // |
| // There are bits in the access_flags telling whether inlined tables are present. |
| // Note that accessing the line number and local variable tables is not performance critical at all. |
| // Accessing the checked exceptions table is used by reflection, so we put that last to make access |
| // to it fast. |
| // |
| // The line number table is compressed and inlined following the byte codes. It is found as the first |
| // byte following the byte codes. The checked exceptions table and the local variable table are inlined |
| // after the line number table, and indexed from the end of the method. We do not compress the checked |
| // exceptions table since the average length is less than 2, and do not bother to compress the local |
| // variable table either since it is mostly absent. |
| // |
| // Note that native_function and signature_handler has to be at fixed offsets (required by the interpreter) |
| // |
| // |------------------------------------------------------| |
| // | header | |
| // | klass | |
| // |------------------------------------------------------| |
| // | constMethodOop (oop) | |
| // | constants (oop) | |
| // |------------------------------------------------------| |
| // | methodData (oop) | |
| // | interp_invocation_count | |
| // |------------------------------------------------------| |
| // | access_flags | |
| // | vtable_index | |
| // |------------------------------------------------------| |
| // | result_index (C++ interpreter only) | |
| // |------------------------------------------------------| |
| // | method_size | max_stack | |
| // | max_locals | size_of_parameters | |
| // |------------------------------------------------------| |
| // | intrinsic_id, highest_tier | (unused) | |
| // |------------------------------------------------------| |
| // | throwout_count | num_breakpoints | |
| // |------------------------------------------------------| |
| // | invocation_counter | |
| // | backedge_counter | |
| // |------------------------------------------------------| |
| // | code (pointer) | |
| // | i2i (pointer) | |
| // | adapter (pointer) | |
| // | from_compiled_entry (pointer) | |
| // | from_interpreted_entry (pointer) | |
| // |------------------------------------------------------| |
| // | native_function (present only if native) | |
| // | signature_handler (present only if native) | |
| // |------------------------------------------------------| |
| |
| |
| class CheckedExceptionElement; |
| class LocalVariableTableElement; |
| class AdapterHandlerEntry; |
| |
| class methodDataOopDesc; |
| |
| class methodOopDesc : public oopDesc { |
| friend class methodKlass; |
| friend class VMStructs; |
| private: |
| constMethodOop _constMethod; // Method read-only data. |
| constantPoolOop _constants; // Constant pool |
| methodDataOop _method_data; |
| int _interpreter_invocation_count; // Count of times invoked |
| AccessFlags _access_flags; // Access flags |
| int _vtable_index; // vtable index of this method (see VtableIndexFlag) |
| // note: can have vtables with >2**16 elements (because of inheritance) |
| #ifdef CC_INTERP |
| int _result_index; // C++ interpreter needs for converting results to/from stack |
| #endif |
| u2 _method_size; // size of this object |
| u2 _max_stack; // Maximum number of entries on the expression stack |
| u2 _max_locals; // Number of local variables used by this method |
| u2 _size_of_parameters; // size of the parameter block (receiver + arguments) in words |
| u1 _intrinsic_id_cache; // Cache for intrinsic_id; 0 or 1+vmInt::ID |
| u1 _highest_tier_compile; // Highest compile level this method has ever seen. |
| u2 _interpreter_throwout_count; // Count of times method was exited via exception while interpreting |
| u2 _number_of_breakpoints; // fullspeed debugging support |
| InvocationCounter _invocation_counter; // Incremented before each activation of the method - used to trigger frequency-based optimizations |
| InvocationCounter _backedge_counter; // Incremented before each backedge taken - used to trigger frequencey-based optimizations |
| #ifndef PRODUCT |
| int _compiled_invocation_count; // Number of nmethod invocations so far (for perf. debugging) |
| #endif |
| // Entry point for calling both from and to the interpreter. |
| address _i2i_entry; // All-args-on-stack calling convention |
| // Adapter blob (i2c/c2i) for this methodOop. Set once when method is linked. |
| AdapterHandlerEntry* _adapter; |
| // Entry point for calling from compiled code, to compiled code if it exists |
| // or else the interpreter. |
| volatile address _from_compiled_entry; // Cache of: _code ? _code->entry_point() : _adapter->c2i_entry() |
| // The entry point for calling both from and to compiled code is |
| // "_code->entry_point()". Because of tiered compilation and de-opt, this |
| // field can come and go. It can transition from NULL to not-null at any |
| // time (whenever a compile completes). It can transition from not-null to |
| // NULL only at safepoints (because of a de-opt). |
| nmethod* volatile _code; // Points to the corresponding piece of native code |
| volatile address _from_interpreted_entry; // Cache of _code ? _adapter->i2c_entry() : _i2i_entry |
| |
| public: |
| |
| static const bool IsUnsafeConc = false; |
| static const bool IsSafeConc = true; |
| |
| // accessors for instance variables |
| constMethodOop constMethod() const { return _constMethod; } |
| void set_constMethod(constMethodOop xconst) { oop_store_without_check((oop*)&_constMethod, (oop)xconst); } |
| |
| |
| static address make_adapters(methodHandle mh, TRAPS); |
| volatile address from_compiled_entry() const { return (address)OrderAccess::load_ptr_acquire(&_from_compiled_entry); } |
| volatile address from_interpreted_entry() const{ return (address)OrderAccess::load_ptr_acquire(&_from_interpreted_entry); } |
| |
| // access flag |
| AccessFlags access_flags() const { return _access_flags; } |
| void set_access_flags(AccessFlags flags) { _access_flags = flags; } |
| |
| // name |
| symbolOop name() const { return _constants->symbol_at(name_index()); } |
| int name_index() const { return constMethod()->name_index(); } |
| void set_name_index(int index) { constMethod()->set_name_index(index); } |
| |
| // signature |
| symbolOop signature() const { return _constants->symbol_at(signature_index()); } |
| int signature_index() const { return constMethod()->signature_index(); } |
| void set_signature_index(int index) { constMethod()->set_signature_index(index); } |
| |
| // generics support |
| symbolOop generic_signature() const { int idx = generic_signature_index(); return ((idx != 0) ? _constants->symbol_at(idx) : (symbolOop)NULL); } |
| int generic_signature_index() const { return constMethod()->generic_signature_index(); } |
| void set_generic_signature_index(int index) { constMethod()->set_generic_signature_index(index); } |
| |
| // annotations support |
| typeArrayOop annotations() const { return instanceKlass::cast(method_holder())->get_method_annotations_of(method_idnum()); } |
| typeArrayOop parameter_annotations() const { return instanceKlass::cast(method_holder())->get_method_parameter_annotations_of(method_idnum()); } |
| typeArrayOop annotation_default() const { return instanceKlass::cast(method_holder())->get_method_default_annotations_of(method_idnum()); } |
| |
| #ifdef CC_INTERP |
| void set_result_index(BasicType type); |
| int result_index() { return _result_index; } |
| #endif |
| |
| // Helper routine: get klass name + "." + method name + signature as |
| // C string, for the purpose of providing more useful NoSuchMethodErrors |
| // and fatal error handling. The string is allocated in resource |
| // area if a buffer is not provided by the caller. |
| char* name_and_sig_as_C_string(); |
| char* name_and_sig_as_C_string(char* buf, int size); |
| |
| // Static routine in the situations we don't have a methodOop |
| static char* name_and_sig_as_C_string(Klass* klass, symbolOop method_name, symbolOop signature); |
| static char* name_and_sig_as_C_string(Klass* klass, symbolOop method_name, symbolOop signature, char* buf, int size); |
| |
| // JVMTI breakpoints |
| Bytecodes::Code orig_bytecode_at(int bci); |
| void set_orig_bytecode_at(int bci, Bytecodes::Code code); |
| void set_breakpoint(int bci); |
| void clear_breakpoint(int bci); |
| void clear_all_breakpoints(); |
| // Tracking number of breakpoints, for fullspeed debugging. |
| // Only mutated by VM thread. |
| u2 number_of_breakpoints() const { return _number_of_breakpoints; } |
| void incr_number_of_breakpoints() { ++_number_of_breakpoints; } |
| void decr_number_of_breakpoints() { --_number_of_breakpoints; } |
| // Initialization only |
| void clear_number_of_breakpoints() { _number_of_breakpoints = 0; } |
| |
| // index into instanceKlass methods() array |
| u2 method_idnum() const { return constMethod()->method_idnum(); } |
| void set_method_idnum(u2 idnum) { constMethod()->set_method_idnum(idnum); } |
| |
| // code size |
| int code_size() const { return constMethod()->code_size(); } |
| |
| // method size |
| int method_size() const { return _method_size; } |
| void set_method_size(int size) { |
| assert(0 <= size && size < (1 << 16), "invalid method size"); |
| _method_size = size; |
| } |
| |
| // constant pool for klassOop holding this method |
| constantPoolOop constants() const { return _constants; } |
| void set_constants(constantPoolOop c) { oop_store_without_check((oop*)&_constants, c); } |
| |
| // max stack |
| int max_stack() const { return _max_stack; } |
| void set_max_stack(int size) { _max_stack = size; } |
| |
| // max locals |
| int max_locals() const { return _max_locals; } |
| void set_max_locals(int size) { _max_locals = size; } |
| int highest_tier_compile() { return _highest_tier_compile;} |
| void set_highest_tier_compile(int level) { _highest_tier_compile = level;} |
| |
| void clear_intrinsic_id_cache() { _intrinsic_id_cache = 0; } |
| |
| // Count of times method was exited via exception while interpreting |
| void interpreter_throwout_increment() { |
| if (_interpreter_throwout_count < 65534) { |
| _interpreter_throwout_count++; |
| } |
| } |
| |
| int interpreter_throwout_count() const { return _interpreter_throwout_count; } |
| void set_interpreter_throwout_count(int count) { _interpreter_throwout_count = count; } |
| |
| // size of parameters |
| int size_of_parameters() const { return _size_of_parameters; } |
| |
| bool has_stackmap_table() const { |
| return constMethod()->has_stackmap_table(); |
| } |
| |
| typeArrayOop stackmap_data() const { |
| return constMethod()->stackmap_data(); |
| } |
| |
| // exception handler table |
| typeArrayOop exception_table() const |
| { return constMethod()->exception_table(); } |
| void set_exception_table(typeArrayOop e) |
| { constMethod()->set_exception_table(e); } |
| bool has_exception_handler() const |
| { return constMethod()->has_exception_handler(); } |
| |
| // Finds the first entry point bci of an exception handler for an |
| // exception of klass ex_klass thrown at throw_bci. A value of NULL |
| // for ex_klass indicates that the exception klass is not known; in |
| // this case it matches any constraint class. Returns -1 if the |
| // exception cannot be handled in this method. The handler |
| // constraint classes are loaded if necessary. Note that this may |
| // throw an exception if loading of the constraint classes causes |
| // an IllegalAccessError (bugid 4307310) or an OutOfMemoryError. |
| // If an exception is thrown, returns the bci of the |
| // exception handler which caused the exception to be thrown, which |
| // is needed for proper retries. See, for example, |
| // InterpreterRuntime::exception_handler_for_exception. |
| int fast_exception_handler_bci_for(KlassHandle ex_klass, int throw_bci, TRAPS); |
| |
| // method data access |
| methodDataOop method_data() const { |
| return _method_data; |
| } |
| void set_method_data(methodDataOop data) { |
| oop_store_without_check((oop*)&_method_data, (oop)data); |
| } |
| |
| // invocation counter |
| InvocationCounter* invocation_counter() { return &_invocation_counter; } |
| InvocationCounter* backedge_counter() { return &_backedge_counter; } |
| int invocation_count() const { return _invocation_counter.count(); } |
| int backedge_count() const { return _backedge_counter.count(); } |
| bool was_executed_more_than(int n) const; |
| bool was_never_executed() const { return !was_executed_more_than(0); } |
| |
| static void build_interpreter_method_data(methodHandle method, TRAPS); |
| |
| int interpreter_invocation_count() const { return _interpreter_invocation_count; } |
| void set_interpreter_invocation_count(int count) { _interpreter_invocation_count = count; } |
| int increment_interpreter_invocation_count() { return ++_interpreter_invocation_count; } |
| |
| #ifndef PRODUCT |
| int compiled_invocation_count() const { return _compiled_invocation_count; } |
| void set_compiled_invocation_count(int count) { _compiled_invocation_count = count; } |
| #endif // not PRODUCT |
| |
| // Clear (non-shared space) pointers which could not be relevant |
| // if this (shared) method were mapped into another JVM. |
| void remove_unshareable_info(); |
| |
| // nmethod/verified compiler entry |
| address verified_code_entry(); |
| bool check_code() const; // Not inline to avoid circular ref |
| nmethod* volatile code() const { assert( check_code(), "" ); return (nmethod *)OrderAccess::load_ptr_acquire(&_code); } |
| void clear_code(); // Clear out any compiled code |
| void set_code(methodHandle mh, nmethod* code); |
| void set_adapter_entry(AdapterHandlerEntry* adapter) { _adapter = adapter; } |
| address get_i2c_entry(); |
| address get_c2i_entry(); |
| address get_c2i_unverified_entry(); |
| AdapterHandlerEntry* adapter() { return _adapter; } |
| // setup entry points |
| void link_method(methodHandle method, TRAPS); |
| // clear entry points. Used by sharing code |
| void unlink_method(); |
| |
| // vtable index |
| enum VtableIndexFlag { |
| // Valid vtable indexes are non-negative (>= 0). |
| // These few negative values are used as sentinels. |
| highest_unused_vtable_index_value = -5, |
| invalid_vtable_index = -4, // distinct from any valid vtable index |
| garbage_vtable_index = -3, // not yet linked; no vtable layout yet |
| nonvirtual_vtable_index = -2 // there is no need for vtable dispatch |
| // 6330203 Note: Do not use -1, which was overloaded with many meanings. |
| }; |
| DEBUG_ONLY(bool valid_vtable_index() const { return _vtable_index >= nonvirtual_vtable_index; }) |
| int vtable_index() const { assert(valid_vtable_index(), ""); |
| return _vtable_index; } |
| void set_vtable_index(int index) { _vtable_index = index; } |
| |
| // interpreter entry |
| address interpreter_entry() const { return _i2i_entry; } |
| // Only used when first initialize so we can set _i2i_entry and _from_interpreted_entry |
| void set_interpreter_entry(address entry) { _i2i_entry = entry; _from_interpreted_entry = entry; } |
| int interpreter_kind(void) { |
| return constMethod()->interpreter_kind(); |
| } |
| void set_interpreter_kind(); |
| void set_interpreter_kind(int kind) { |
| constMethod()->set_interpreter_kind(kind); |
| } |
| |
| // native function (used for native methods only) |
| enum { |
| native_bind_event_is_interesting = true |
| }; |
| address native_function() const { return *(native_function_addr()); } |
| // Must specify a real function (not NULL). |
| // Use clear_native_function() to unregister. |
| void set_native_function(address function, bool post_event_flag); |
| bool has_native_function() const; |
| void clear_native_function(); |
| |
| // signature handler (used for native methods only) |
| address signature_handler() const { return *(signature_handler_addr()); } |
| void set_signature_handler(address handler); |
| |
| // Interpreter oopmap support |
| void mask_for(int bci, InterpreterOopMap* mask); |
| |
| #ifndef PRODUCT |
| // operations on invocation counter |
| void print_invocation_count() const; |
| #endif |
| |
| // byte codes |
| address code_base() const { return constMethod()->code_base(); } |
| bool contains(address bcp) const { return constMethod()->contains(bcp); } |
| |
| // prints byte codes |
| void print_codes() const { print_codes_on(tty); } |
| void print_codes_on(outputStream* st) const PRODUCT_RETURN; |
| void print_codes_on(int from, int to, outputStream* st) const PRODUCT_RETURN; |
| |
| // checked exceptions |
| int checked_exceptions_length() const |
| { return constMethod()->checked_exceptions_length(); } |
| CheckedExceptionElement* checked_exceptions_start() const |
| { return constMethod()->checked_exceptions_start(); } |
| |
| // localvariable table |
| bool has_localvariable_table() const |
| { return constMethod()->has_localvariable_table(); } |
| int localvariable_table_length() const |
| { return constMethod()->localvariable_table_length(); } |
| LocalVariableTableElement* localvariable_table_start() const |
| { return constMethod()->localvariable_table_start(); } |
| |
| bool has_linenumber_table() const |
| { return constMethod()->has_linenumber_table(); } |
| u_char* compressed_linenumber_table() const |
| { return constMethod()->compressed_linenumber_table(); } |
| |
| // method holder (the klassOop holding this method) |
| klassOop method_holder() const { return _constants->pool_holder(); } |
| |
| void compute_size_of_parameters(Thread *thread); // word size of parameters (receiver if any + arguments) |
| symbolOop klass_name() const; // returns the name of the method holder |
| BasicType result_type() const; // type of the method result |
| int result_type_index() const; // type index of the method result |
| bool is_returning_oop() const { BasicType r = result_type(); return (r == T_OBJECT || r == T_ARRAY); } |
| bool is_returning_fp() const { BasicType r = result_type(); return (r == T_FLOAT || r == T_DOUBLE); } |
| |
| // Checked exceptions thrown by this method (resolved to mirrors) |
| objArrayHandle resolved_checked_exceptions(TRAPS) { return resolved_checked_exceptions_impl(this, THREAD); } |
| |
| // Access flags |
| bool is_public() const { return access_flags().is_public(); } |
| bool is_private() const { return access_flags().is_private(); } |
| bool is_protected() const { return access_flags().is_protected(); } |
| bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); } |
| bool is_static() const { return access_flags().is_static(); } |
| bool is_final() const { return access_flags().is_final(); } |
| bool is_synchronized() const { return access_flags().is_synchronized();} |
| bool is_native() const { return access_flags().is_native(); } |
| bool is_abstract() const { return access_flags().is_abstract(); } |
| bool is_strict() const { return access_flags().is_strict(); } |
| bool is_synthetic() const { return access_flags().is_synthetic(); } |
| |
| // returns true if contains only return operation |
| bool is_empty_method() const; |
| |
| // returns true if this is a vanilla constructor |
| bool is_vanilla_constructor() const; |
| |
| // checks method and its method holder |
| bool is_final_method() const; |
| bool is_strict_method() const; |
| |
| // true if method needs no dynamic dispatch (final and/or no vtable entry) |
| bool can_be_statically_bound() const; |
| |
| // returns true if the method has any backward branches. |
| bool has_loops() { |
| return access_flags().loops_flag_init() ? access_flags().has_loops() : compute_has_loops_flag(); |
| }; |
| |
| bool compute_has_loops_flag(); |
| |
| bool has_jsrs() { |
| return access_flags().has_jsrs(); |
| }; |
| void set_has_jsrs() { |
| _access_flags.set_has_jsrs(); |
| } |
| |
| // returns true if the method has any monitors. |
| bool has_monitors() const { return is_synchronized() || access_flags().has_monitor_bytecodes(); } |
| bool has_monitor_bytecodes() const { return access_flags().has_monitor_bytecodes(); } |
| |
| void set_has_monitor_bytecodes() { _access_flags.set_has_monitor_bytecodes(); } |
| |
| // monitor matching. This returns a conservative estimate of whether the monitorenter/monitorexit bytecodes |
| // propererly nest in the method. It might return false, even though they actually nest properly, since the info. |
| // has not been computed yet. |
| bool guaranteed_monitor_matching() const { return access_flags().is_monitor_matching(); } |
| void set_guaranteed_monitor_matching() { _access_flags.set_monitor_matching(); } |
| |
| // returns true if the method is an accessor function (setter/getter). |
| bool is_accessor() const; |
| |
| // returns true if the method is an initializer (<init> or <clinit>). |
| bool is_initializer() const; |
| |
| // compiled code support |
| // NOTE: code() is inherently racy as deopt can be clearing code |
| // simultaneously. Use with caution. |
| bool has_compiled_code() const { return code() != NULL; } |
| |
| // sizing |
| static int object_size(bool is_native); |
| static int header_size() { return sizeof(methodOopDesc)/HeapWordSize; } |
| int object_size() const { return method_size(); } |
| |
| bool object_is_parsable() const { return method_size() > 0; } |
| |
| // interpreter support |
| static ByteSize const_offset() { return byte_offset_of(methodOopDesc, _constMethod ); } |
| static ByteSize constants_offset() { return byte_offset_of(methodOopDesc, _constants ); } |
| static ByteSize access_flags_offset() { return byte_offset_of(methodOopDesc, _access_flags ); } |
| #ifdef CC_INTERP |
| static ByteSize result_index_offset() { return byte_offset_of(methodOopDesc, _result_index ); } |
| #endif /* CC_INTERP */ |
| static ByteSize size_of_locals_offset() { return byte_offset_of(methodOopDesc, _max_locals ); } |
| static ByteSize size_of_parameters_offset() { return byte_offset_of(methodOopDesc, _size_of_parameters); } |
| static ByteSize from_compiled_offset() { return byte_offset_of(methodOopDesc, _from_compiled_entry); } |
| static ByteSize code_offset() { return byte_offset_of(methodOopDesc, _code); } |
| static ByteSize invocation_counter_offset() { return byte_offset_of(methodOopDesc, _invocation_counter); } |
| static ByteSize backedge_counter_offset() { return byte_offset_of(methodOopDesc, _backedge_counter); } |
| static ByteSize method_data_offset() { |
| return byte_offset_of(methodOopDesc, _method_data); |
| } |
| static ByteSize interpreter_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _interpreter_invocation_count); } |
| #ifndef PRODUCT |
| static ByteSize compiled_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _compiled_invocation_count); } |
| #endif // not PRODUCT |
| static ByteSize native_function_offset() { return in_ByteSize(sizeof(methodOopDesc)); } |
| static ByteSize from_interpreted_offset() { return byte_offset_of(methodOopDesc, _from_interpreted_entry ); } |
| static ByteSize interpreter_entry_offset() { return byte_offset_of(methodOopDesc, _i2i_entry ); } |
| static ByteSize signature_handler_offset() { return in_ByteSize(sizeof(methodOopDesc) + wordSize); } |
| static ByteSize max_stack_offset() { return byte_offset_of(methodOopDesc, _max_stack ); } |
| |
| // for code generation |
| static int method_data_offset_in_bytes() { return offset_of(methodOopDesc, _method_data); } |
| static int interpreter_invocation_counter_offset_in_bytes() |
| { return offset_of(methodOopDesc, _interpreter_invocation_count); } |
| |
| // Static methods that are used to implement member methods where an exposed this pointer |
| // is needed due to possible GCs |
| static objArrayHandle resolved_checked_exceptions_impl(methodOop this_oop, TRAPS); |
| |
| // Returns the byte code index from the byte code pointer |
| int bci_from(address bcp) const; |
| address bcp_from(int bci) const; |
| int validate_bci_from_bcx(intptr_t bcx) const; |
| |
| // Returns the line number for a bci if debugging information for the method is prowided, |
| // -1 is returned otherwise. |
| int line_number_from_bci(int bci) const; |
| |
| // Reflection support |
| bool is_overridden_in(klassOop k) const; |
| |
| // JSR 292 support |
| bool is_method_handle_invoke() const { return access_flags().is_method_handle_invoke(); } |
| static methodHandle make_invoke_method(KlassHandle holder, |
| symbolHandle signature, |
| Handle method_type, |
| TRAPS); |
| // these operate only on invoke methods: |
| oop method_handle_type() const; |
| static jint* method_type_offsets_chain(); // series of pointer-offsets, terminated by -1 |
| // presize interpreter frames for extra interpreter stack entries, if needed |
| static int extra_stack_entries() { return EnableMethodHandles ? (int)MethodHandlePushLimit : 0; } |
| static int extra_stack_words(); // = extra_stack_entries() * Interpreter::stackElementSize() |
| // RedefineClasses() support: |
| bool is_old() const { return access_flags().is_old(); } |
| void set_is_old() { _access_flags.set_is_old(); } |
| bool is_obsolete() const { return access_flags().is_obsolete(); } |
| void set_is_obsolete() { _access_flags.set_is_obsolete(); } |
| // see the definition in methodOop.cpp for the gory details |
| bool should_not_be_cached() const; |
| |
| // JVMTI Native method prefixing support: |
| bool is_prefixed_native() const { return access_flags().is_prefixed_native(); } |
| void set_is_prefixed_native() { _access_flags.set_is_prefixed_native(); } |
| |
| // Rewriting support |
| static methodHandle clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length, |
| u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS); |
| |
| // Get this method's jmethodID -- allocate if it doesn't exist |
| jmethodID jmethod_id() { methodHandle this_h(this); |
| return instanceKlass::jmethod_id_for_impl(method_holder(), this_h); } |
| |
| // Lookup the jmethodID for this method. Return NULL if not found. |
| // NOTE that this function can be called from a signal handler |
| // (see AsyncGetCallTrace support for Forte Analyzer) and this |
| // needs to be async-safe. No allocation should be done and |
| // so handles are not used to avoid deadlock. |
| jmethodID find_jmethod_id_or_null() { return instanceKlass::cast(method_holder())->jmethod_id_or_null(this); } |
| |
| // JNI static invoke cached itable index accessors |
| int cached_itable_index() { return instanceKlass::cast(method_holder())->cached_itable_index(method_idnum()); } |
| void set_cached_itable_index(int index) { instanceKlass::cast(method_holder())->set_cached_itable_index(method_idnum(), index); } |
| |
| // Support for inlining of intrinsic methods |
| vmIntrinsics::ID intrinsic_id() const { // returns zero if not an intrinsic |
| const u1& cache = _intrinsic_id_cache; |
| if (cache != 0) { |
| return (vmIntrinsics::ID)(cache - 1); |
| } else { |
| vmIntrinsics::ID id = compute_intrinsic_id(); |
| *(u1*)&cache = ((u1) id) + 1; // force the cache to be non-const |
| vmIntrinsics::verify_method(id, (methodOop) this); |
| assert((vmIntrinsics::ID)(cache - 1) == id, "proper conversion"); |
| return id; |
| } |
| } |
| |
| // On-stack replacement support |
| bool has_osr_nmethod() { return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, InvocationEntryBci) != NULL; } |
| nmethod* lookup_osr_nmethod_for(int bci) { return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, bci); } |
| |
| // Inline cache support |
| void cleanup_inline_caches(); |
| |
| // Find if klass for method is loaded |
| bool is_klass_loaded_by_klass_index(int klass_index) const; |
| bool is_klass_loaded(int refinfo_index, bool must_be_resolved = false) const; |
| |
| // Indicates whether compilation failed earlier for this method, or |
| // whether it is not compilable for another reason like having a |
| // breakpoint set in it. |
| bool is_not_compilable(int comp_level = CompLevel_highest_tier) const; |
| void set_not_compilable(int comp_level = CompLevel_highest_tier); |
| |
| bool is_not_osr_compilable() const { return is_not_compilable() || access_flags().is_not_osr_compilable(); } |
| void set_not_osr_compilable() { _access_flags.set_not_osr_compilable(); } |
| |
| bool is_not_tier1_compilable() const { return access_flags().is_not_tier1_compilable(); } |
| void set_not_tier1_compilable() { _access_flags.set_not_tier1_compilable(); } |
| |
| // Background compilation support |
| bool queued_for_compilation() const { return access_flags().queued_for_compilation(); } |
| void set_queued_for_compilation() { _access_flags.set_queued_for_compilation(); } |
| void clear_queued_for_compilation() { _access_flags.clear_queued_for_compilation(); } |
| |
| static methodOop method_from_bcp(address bcp); |
| |
| // Resolve all classes in signature, return 'true' if successful |
| static bool load_signature_classes(methodHandle m, TRAPS); |
| |
| // Return if true if not all classes references in signature, including return type, has been loaded |
| static bool has_unloaded_classes_in_signature(methodHandle m, TRAPS); |
| |
| // Printing |
| void print_short_name(outputStream* st) /*PRODUCT_RETURN*/; // prints as klassname::methodname; Exposed so field engineers can debug VM |
| void print_name(outputStream* st) PRODUCT_RETURN; // prints as "virtual void foo(int)" |
| |
| // Helper routine used for method sorting |
| static void sort_methods(objArrayOop methods, |
| objArrayOop methods_annotations, |
| objArrayOop methods_parameter_annotations, |
| objArrayOop methods_default_annotations, |
| bool idempotent = false); |
| |
| // size of parameters |
| void set_size_of_parameters(int size) { _size_of_parameters = size; } |
| private: |
| |
| // Helper routine for intrinsic_id(). |
| vmIntrinsics::ID compute_intrinsic_id() const; |
| |
| // Inlined elements |
| address* native_function_addr() const { assert(is_native(), "must be native"); return (address*) (this+1); } |
| address* signature_handler_addr() const { return native_function_addr() + 1; } |
| |
| // Garbage collection support |
| oop* adr_constMethod() const { return (oop*)&_constMethod; } |
| oop* adr_constants() const { return (oop*)&_constants; } |
| oop* adr_method_data() const { return (oop*)&_method_data; } |
| }; |
| |
| |
| // Utility class for compressing line number tables |
| |
| class CompressedLineNumberWriteStream: public CompressedWriteStream { |
| private: |
| int _bci; |
| int _line; |
| public: |
| // Constructor |
| CompressedLineNumberWriteStream(int initial_size) : CompressedWriteStream(initial_size), _bci(0), _line(0) {} |
| CompressedLineNumberWriteStream(u_char* buffer, int initial_size) : CompressedWriteStream(buffer, initial_size), _bci(0), _line(0) {} |
| |
| // Write (bci, line number) pair to stream |
| void write_pair_regular(int bci_delta, int line_delta); |
| |
| inline void write_pair_inline(int bci, int line) { |
| int bci_delta = bci - _bci; |
| int line_delta = line - _line; |
| _bci = bci; |
| _line = line; |
| // Skip (0,0) deltas - they do not add information and conflict with terminator. |
| if (bci_delta == 0 && line_delta == 0) return; |
| // Check if bci is 5-bit and line number 3-bit unsigned. |
| if (((bci_delta & ~0x1F) == 0) && ((line_delta & ~0x7) == 0)) { |
| // Compress into single byte. |
| jubyte value = ((jubyte) bci_delta << 3) | (jubyte) line_delta; |
| // Check that value doesn't match escape character. |
| if (value != 0xFF) { |
| write_byte(value); |
| return; |
| } |
| } |
| write_pair_regular(bci_delta, line_delta); |
| } |
| |
| // Windows AMD64 + Apr 2005 PSDK with /O2 generates bad code for write_pair. |
| // Disabling optimization doesn't work for methods in header files |
| // so we force it to call through the non-optimized version in the .cpp. |
| // It's gross, but it's the only way we can ensure that all callers are |
| // fixed. MSC_VER is defined in build/windows/makefiles/compile.make. |
| #if defined(_M_AMD64) && MSC_VER >= 1400 |
| void write_pair(int bci, int line); |
| #else |
| void write_pair(int bci, int line) { write_pair_inline(bci, line); } |
| #endif |
| |
| // Write end-of-stream marker |
| void write_terminator() { write_byte(0); } |
| }; |
| |
| |
| // Utility class for decompressing line number tables |
| |
| class CompressedLineNumberReadStream: public CompressedReadStream { |
| private: |
| int _bci; |
| int _line; |
| public: |
| // Constructor |
| CompressedLineNumberReadStream(u_char* buffer); |
| // Read (bci, line number) pair from stream. Returns false at end-of-stream. |
| bool read_pair(); |
| // Accessing bci and line number (after calling read_pair) |
| int bci() const { return _bci; } |
| int line() const { return _line; } |
| }; |
| |
| |
| /// Fast Breakpoints. |
| |
| // If this structure gets more complicated (because bpts get numerous), |
| // move it into its own header. |
| |
| // There is presently no provision for concurrent access |
| // to breakpoint lists, which is only OK for JVMTI because |
| // breakpoints are written only at safepoints, and are read |
| // concurrently only outside of safepoints. |
| |
| class BreakpointInfo : public CHeapObj { |
| friend class VMStructs; |
| private: |
| Bytecodes::Code _orig_bytecode; |
| int _bci; |
| u2 _name_index; // of method |
| u2 _signature_index; // of method |
| BreakpointInfo* _next; // simple storage allocation |
| |
| public: |
| BreakpointInfo(methodOop m, int bci); |
| |
| // accessors |
| Bytecodes::Code orig_bytecode() { return _orig_bytecode; } |
| void set_orig_bytecode(Bytecodes::Code code) { _orig_bytecode = code; } |
| int bci() { return _bci; } |
| |
| BreakpointInfo* next() const { return _next; } |
| void set_next(BreakpointInfo* n) { _next = n; } |
| |
| // helps for searchers |
| bool match(methodOop m, int bci) { |
| return bci == _bci && match(m); |
| } |
| |
| bool match(methodOop m) { |
| return _name_index == m->name_index() && |
| _signature_index == m->signature_index(); |
| } |
| |
| void set(methodOop method); |
| void clear(methodOop method); |
| }; |
