| /* |
| * Copyright (c) 1997, 2016, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef SHARE_VM_OOPS_METHODOOP_HPP |
| #define SHARE_VM_OOPS_METHODOOP_HPP |
| |
| #include "classfile/vmSymbols.hpp" |
| #include "code/compressedStream.hpp" |
| #include "compiler/oopMap.hpp" |
| #include "interpreter/invocationCounter.hpp" |
| #include "oops/annotations.hpp" |
| #include "oops/constantPool.hpp" |
| #include "oops/methodCounters.hpp" |
| #include "oops/instanceKlass.hpp" |
| #include "oops/oop.hpp" |
| #include "oops/typeArrayOop.hpp" |
| #include "utilities/accessFlags.hpp" |
| #include "utilities/growableArray.hpp" |
| |
| // A Method* 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 Method 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 | |
| // |------------------------------------------------------| |
| // | ConstMethod* (oop) | |
| // |------------------------------------------------------| |
| // | methodData (oop) | |
| // | methodCounters | |
| // |------------------------------------------------------| |
| // | access_flags | |
| // | vtable_index | |
| // |------------------------------------------------------| |
| // | result_index (C++ interpreter only) | |
| // |------------------------------------------------------| |
| // | method_size | intrinsic_id| flags | |
| // |------------------------------------------------------| |
| // | 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 MethodData; |
| class MethodCounters; |
| class ConstMethod; |
| class InlineTableSizes; |
| class KlassSizeStats; |
| |
| class Method : public Metadata { |
| friend class VMStructs; |
| private: |
| ConstMethod* _constMethod; // Method read-only data. |
| MethodData* _method_data; |
| MethodCounters* _method_counters; |
| 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) |
| u2 _method_size; // size of this object |
| u1 _intrinsic_id; // vmSymbols::intrinsic_id (0 == _none) |
| u1 _jfr_towrite : 1, // Flags |
| _caller_sensitive : 1, |
| _force_inline : 1, |
| _hidden : 1, |
| _dont_inline : 1, |
| _has_injected_profile : 1, |
| : 2; |
| |
| #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 Method*. 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 |
| |
| // Constructor |
| Method(ConstMethod* xconst, AccessFlags access_flags, int size); |
| public: |
| |
| static Method* allocate(ClassLoaderData* loader_data, |
| int byte_code_size, |
| AccessFlags access_flags, |
| InlineTableSizes* sizes, |
| ConstMethod::MethodType method_type, |
| TRAPS); |
| |
| // CDS and vtbl checking can create an empty Method to get vtbl pointer. |
| Method(){} |
| |
| // The Method vtable is restored by this call when the Method is in the |
| // shared archive. See patch_klass_vtables() in metaspaceShared.cpp for |
| // all the gory details. SA, dtrace and pstack helpers distinguish metadata |
| // by their vtable. |
| void restore_vtable() { guarantee(is_method(), "vtable restored by this call"); } |
| bool is_method() const volatile { return true; } |
| |
| void restore_unshareable_info(TRAPS); |
| |
| // accessors for instance variables |
| |
| ConstMethod* constMethod() const { return _constMethod; } |
| void set_constMethod(ConstMethod* xconst) { _constMethod = 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 |
| Symbol* 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 |
| Symbol* 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 |
| Symbol* generic_signature() const { int idx = generic_signature_index(); return ((idx != 0) ? constants()->symbol_at(idx) : (Symbol*)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 |
| AnnotationArray* annotations() const { |
| return constMethod()->method_annotations(); |
| } |
| AnnotationArray* parameter_annotations() const { |
| return constMethod()->parameter_annotations(); |
| } |
| AnnotationArray* annotation_default() const { |
| return constMethod()->default_annotations(); |
| } |
| AnnotationArray* type_annotations() const { |
| return constMethod()->type_annotations(); |
| } |
| |
| // 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() const; |
| char* name_and_sig_as_C_string(char* buf, int size) const; |
| |
| // Static routine in the situations we don't have a Method* |
| static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature); |
| static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature, char* buf, int size); |
| |
| Bytecodes::Code java_code_at(int bci) const { |
| return Bytecodes::java_code_at(this, bcp_from(bci)); |
| } |
| Bytecodes::Code code_at(int bci) const { |
| return Bytecodes::code_at(this, bcp_from(bci)); |
| } |
| |
| // JVMTI breakpoints |
| Bytecodes::Code orig_bytecode_at(int bci) const; |
| 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 { |
| MethodCounters* mcs = method_counters(); |
| if (mcs == NULL) { |
| return 0; |
| } else { |
| return mcs->number_of_breakpoints(); |
| } |
| } |
| void incr_number_of_breakpoints(TRAPS) { |
| MethodCounters* mcs = get_method_counters(CHECK); |
| if (mcs != NULL) { |
| mcs->incr_number_of_breakpoints(); |
| } |
| } |
| void decr_number_of_breakpoints(TRAPS) { |
| MethodCounters* mcs = get_method_counters(CHECK); |
| if (mcs != NULL) { |
| mcs->decr_number_of_breakpoints(); |
| } |
| } |
| // Initialization only |
| void clear_number_of_breakpoints() { |
| MethodCounters* mcs = method_counters(); |
| if (mcs != NULL) { |
| mcs->clear_number_of_breakpoints(); |
| } |
| } |
| |
| // index into InstanceKlass methods() array |
| // note: also used by jfr |
| u2 method_idnum() const { return constMethod()->method_idnum(); } |
| void set_method_idnum(u2 idnum) { constMethod()->set_method_idnum(idnum); } |
| |
| u2 orig_method_idnum() const { return constMethod()->orig_method_idnum(); } |
| void set_orig_method_idnum(u2 idnum) { constMethod()->set_orig_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 Klass* holding this method |
| ConstantPool* constants() const { return constMethod()->constants(); } |
| void set_constants(ConstantPool* c) { constMethod()->set_constants(c); } |
| |
| // max stack |
| // return original max stack size for method verification |
| int verifier_max_stack() const { return constMethod()->max_stack(); } |
| int max_stack() const { return constMethod()->max_stack() + extra_stack_entries(); } |
| void set_max_stack(int size) { constMethod()->set_max_stack(size); } |
| |
| // max locals |
| int max_locals() const { return constMethod()->max_locals(); } |
| void set_max_locals(int size) { constMethod()->set_max_locals(size); } |
| |
| int highest_comp_level() const; |
| void set_highest_comp_level(int level); |
| int highest_osr_comp_level() const; |
| void set_highest_osr_comp_level(int level); |
| |
| // Count of times method was exited via exception while interpreting |
| void interpreter_throwout_increment(TRAPS) { |
| MethodCounters* mcs = get_method_counters(CHECK); |
| if (mcs != NULL) { |
| mcs->interpreter_throwout_increment(); |
| } |
| } |
| |
| int interpreter_throwout_count() const { |
| MethodCounters* mcs = method_counters(); |
| if (mcs == NULL) { |
| return 0; |
| } else { |
| return mcs->interpreter_throwout_count(); |
| } |
| } |
| |
| // size of parameters |
| int size_of_parameters() const { return constMethod()->size_of_parameters(); } |
| void set_size_of_parameters(int size) { constMethod()->set_size_of_parameters(size); } |
| |
| bool has_stackmap_table() const { |
| return constMethod()->has_stackmap_table(); |
| } |
| |
| Array<u1>* stackmap_data() const { |
| return constMethod()->stackmap_data(); |
| } |
| |
| void set_stackmap_data(Array<u1>* sd) { |
| constMethod()->set_stackmap_data(sd); |
| } |
| |
| // exception handler table |
| bool has_exception_handler() const |
| { return constMethod()->has_exception_handler(); } |
| int exception_table_length() const |
| { return constMethod()->exception_table_length(); } |
| ExceptionTableElement* exception_table_start() const |
| { return constMethod()->exception_table_start(); } |
| |
| // 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. |
| static int fast_exception_handler_bci_for(methodHandle mh, KlassHandle ex_klass, int throw_bci, TRAPS); |
| |
| // method data access |
| MethodData* method_data() const { |
| return _method_data; |
| } |
| |
| void set_method_data(MethodData* data) { |
| // The store into method must be released. On platforms without |
| // total store order (TSO) the reference may become visible before |
| // the initialization of data otherwise. |
| OrderAccess::release_store_ptr((volatile void *)&_method_data, data); |
| } |
| |
| MethodCounters* method_counters() const { |
| return _method_counters; |
| } |
| |
| void clear_method_counters() { |
| _method_counters = NULL; |
| } |
| |
| bool init_method_counters(MethodCounters* counters) { |
| // Try to install a pointer to MethodCounters, return true on success. |
| return Atomic::cmpxchg_ptr(counters, (volatile void*)&_method_counters, NULL) == NULL; |
| } |
| |
| #ifdef TIERED |
| // We are reusing interpreter_invocation_count as a holder for the previous event count! |
| // We can do that since interpreter_invocation_count is not used in tiered. |
| int prev_event_count() const { |
| if (method_counters() == NULL) { |
| return 0; |
| } else { |
| return method_counters()->interpreter_invocation_count(); |
| } |
| } |
| void set_prev_event_count(int count) { |
| MethodCounters* mcs = method_counters(); |
| if (mcs != NULL) { |
| mcs->set_interpreter_invocation_count(count); |
| } |
| } |
| jlong prev_time() const { |
| MethodCounters* mcs = method_counters(); |
| return mcs == NULL ? 0 : mcs->prev_time(); |
| } |
| void set_prev_time(jlong time) { |
| MethodCounters* mcs = method_counters(); |
| if (mcs != NULL) { |
| mcs->set_prev_time(time); |
| } |
| } |
| float rate() const { |
| MethodCounters* mcs = method_counters(); |
| return mcs == NULL ? 0 : mcs->rate(); |
| } |
| void set_rate(float rate) { |
| MethodCounters* mcs = method_counters(); |
| if (mcs != NULL) { |
| mcs->set_rate(rate); |
| } |
| } |
| #endif |
| |
| int invocation_count(); |
| int backedge_count(); |
| |
| bool was_executed_more_than(int n); |
| bool was_never_executed() { return !was_executed_more_than(0); } |
| |
| static void build_interpreter_method_data(methodHandle method, TRAPS); |
| |
| static MethodCounters* build_method_counters(Method* m, TRAPS); |
| |
| int interpreter_invocation_count() { |
| if (TieredCompilation) { |
| return invocation_count(); |
| } else { |
| MethodCounters* mcs = method_counters(); |
| return (mcs == NULL) ? 0 : mcs->interpreter_invocation_count(); |
| } |
| } |
| int increment_interpreter_invocation_count(TRAPS) { |
| if (TieredCompilation) ShouldNotReachHere(); |
| MethodCounters* mcs = get_method_counters(CHECK_0); |
| return (mcs == NULL) ? 0 : mcs->increment_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 |
| static 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. |
| itable_index_max = -10, // first itable index, growing downward |
| pending_itable_index = -9, // itable index will be assigned |
| 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; }) |
| bool has_vtable_index() const { return _vtable_index >= 0; } |
| int vtable_index() const { return _vtable_index; } |
| void set_vtable_index(int index); |
| DEBUG_ONLY(bool valid_itable_index() const { return _vtable_index <= pending_itable_index; }) |
| bool has_itable_index() const { return _vtable_index <= itable_index_max; } |
| int itable_index() const { assert(valid_itable_index(), ""); |
| return itable_index_max - _vtable_index; } |
| void set_itable_index(int 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; } |
| |
| // native function (used for native methods only) |
| enum { |
| native_bind_event_is_interesting = true |
| }; |
| address native_function() const { return *(native_function_addr()); } |
| address critical_native_function(); |
| |
| // 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(); |
| #endif |
| |
| // byte codes |
| void set_code(address code) { return constMethod()->set_code(code); } |
| 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; |
| |
| // method parameters |
| bool has_method_parameters() const |
| { return constMethod()->has_method_parameters(); } |
| int method_parameters_length() const |
| { return constMethod()->method_parameters_length(); } |
| MethodParametersElement* method_parameters_start() const |
| { return constMethod()->method_parameters_start(); } |
| |
| // 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 Klass* holding this method) |
| InstanceKlass* method_holder() const { return constants()->pool_holder(); } |
| |
| void compute_size_of_parameters(Thread *thread); // word size of parameters (receiver if any + arguments) |
| Symbol* klass_name() const; // returns the name of the method holder |
| BasicType result_type() const; // type 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_final_method(AccessFlags class_access_flags) const; |
| bool is_default_method() const; |
| |
| // true if method needs no dynamic dispatch (final and/or no vtable entry) |
| bool can_be_statically_bound() const; |
| bool can_be_statically_bound(AccessFlags class_access_flags) 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 does nothing but return a constant of primitive type |
| bool is_constant_getter() const; |
| |
| // returns true if the method is an initializer (<init> or <clinit>). |
| bool is_initializer() const; |
| |
| // returns true if the method is static OR if the classfile version < 51 |
| bool has_valid_initializer_flags() const; |
| |
| // returns true if the method name is <clinit> and the method has |
| // valid static initializer flags. |
| bool is_static_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 header_size() { return sizeof(Method)/HeapWordSize; } |
| static int size(bool is_native); |
| int size() const { return method_size(); } |
| #if INCLUDE_SERVICES |
| void collect_statistics(KlassSizeStats *sz) const; |
| #endif |
| |
| // interpreter support |
| static ByteSize const_offset() { return byte_offset_of(Method, _constMethod ); } |
| static ByteSize access_flags_offset() { return byte_offset_of(Method, _access_flags ); } |
| static ByteSize from_compiled_offset() { return byte_offset_of(Method, _from_compiled_entry); } |
| static ByteSize code_offset() { return byte_offset_of(Method, _code); } |
| static ByteSize method_data_offset() { |
| return byte_offset_of(Method, _method_data); |
| } |
| static ByteSize method_counters_offset() { |
| return byte_offset_of(Method, _method_counters); |
| } |
| #ifndef PRODUCT |
| static ByteSize compiled_invocation_counter_offset() { return byte_offset_of(Method, _compiled_invocation_count); } |
| #endif // not PRODUCT |
| static ByteSize native_function_offset() { return in_ByteSize(sizeof(Method)); } |
| static ByteSize from_interpreted_offset() { return byte_offset_of(Method, _from_interpreted_entry ); } |
| static ByteSize interpreter_entry_offset() { return byte_offset_of(Method, _i2i_entry ); } |
| static ByteSize signature_handler_offset() { return in_ByteSize(sizeof(Method) + wordSize); } |
| |
| // for code generation |
| static int method_data_offset_in_bytes() { return offset_of(Method, _method_data); } |
| static int intrinsic_id_offset_in_bytes() { return offset_of(Method, _intrinsic_id); } |
| static int intrinsic_id_size_in_bytes() { return sizeof(u1); } |
| |
| // 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(Method* 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(Klass* k) const; |
| |
| // Stack walking support |
| bool is_ignored_by_security_stack_walk() const; |
| |
| // JSR 292 support |
| bool is_method_handle_intrinsic() const; // MethodHandles::is_signature_polymorphic_intrinsic(intrinsic_id) |
| bool is_compiled_lambda_form() const; // intrinsic_id() == vmIntrinsics::_compiledLambdaForm |
| bool has_member_arg() const; // intrinsic_id() == vmIntrinsics::_linkToSpecial, etc. |
| static methodHandle make_method_handle_intrinsic(vmIntrinsics::ID iid, // _invokeBasic, _linkToVirtual |
| Symbol* signature, //anything at all |
| TRAPS); |
| static Klass* check_non_bcp_klass(Klass* klass); |
| |
| // How many extra stack entries for invokedynamic when it's enabled |
| static const int extra_stack_entries_for_jsr292 = 1; |
| |
| // this operates only on invoke methods: |
| // presize interpreter frames for extra interpreter stack entries, if needed |
| // Account for the extra appendix argument for invokehandle/invokedynamic |
| static int extra_stack_entries() { return EnableInvokeDynamic ? extra_stack_entries_for_jsr292 : 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(); } |
| bool is_deleted() const { return access_flags().is_deleted(); } |
| void set_is_deleted() { _access_flags.set_is_deleted(); } |
| bool on_stack() const { return access_flags().on_stack(); } |
| void set_on_stack(const bool value); |
| |
| // see the definition in Method*.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); |
| |
| // jmethodID handling |
| // Because the useful life-span of a jmethodID cannot be determined, |
| // once created they are never reclaimed. The methods to which they refer, |
| // however, can be GC'ed away if the class is unloaded or if the method is |
| // made obsolete or deleted -- in these cases, the jmethodID |
| // refers to NULL (as is the case for any weak reference). |
| static jmethodID make_jmethod_id(ClassLoaderData* loader_data, Method* mh); |
| static void destroy_jmethod_id(ClassLoaderData* loader_data, jmethodID mid); |
| |
| // Use resolve_jmethod_id() in situations where the caller is expected |
| // to provide a valid jmethodID; the only sanity checks are in asserts; |
| // result guaranteed not to be NULL. |
| inline static Method* resolve_jmethod_id(jmethodID mid) { |
| assert(mid != NULL, "JNI method id should not be null"); |
| return *((Method**)mid); |
| } |
| |
| // Use checked_resolve_jmethod_id() in situations where the caller |
| // should provide a valid jmethodID, but might not. NULL is returned |
| // when the jmethodID does not refer to a valid method. |
| static Method* checked_resolve_jmethod_id(jmethodID mid); |
| |
| static void change_method_associated_with_jmethod_id(jmethodID old_jmid_ptr, Method* new_method); |
| static bool is_method_id(jmethodID mid); |
| |
| // Clear methods |
| static void clear_jmethod_ids(ClassLoaderData* loader_data); |
| static void print_jmethod_ids(ClassLoaderData* loader_data, outputStream* out) PRODUCT_RETURN; |
| |
| // Get this method's jmethodID -- allocate if it doesn't exist |
| jmethodID jmethod_id() { methodHandle this_h(this); |
| return InstanceKlass::get_jmethod_id(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 method_holder()->jmethod_id_or_null(this); } |
| |
| // Support for inlining of intrinsic methods |
| vmIntrinsics::ID intrinsic_id() const { return (vmIntrinsics::ID) _intrinsic_id; } |
| void set_intrinsic_id(vmIntrinsics::ID id) { _intrinsic_id = (u1) id; } |
| |
| // Helper routines for intrinsic_id() and vmIntrinsics::method(). |
| void init_intrinsic_id(); // updates from _none if a match |
| void clear_jmethod_id(ClassLoaderData* loader_data); |
| |
| static vmSymbols::SID klass_id_for_intrinsics(Klass* holder); |
| |
| bool jfr_towrite() { return _jfr_towrite; } |
| void set_jfr_towrite(bool x) { _jfr_towrite = x; } |
| bool caller_sensitive() { return _caller_sensitive; } |
| void set_caller_sensitive(bool x) { _caller_sensitive = x; } |
| bool force_inline() { return _force_inline; } |
| void set_force_inline(bool x) { _force_inline = x; } |
| bool dont_inline() { return _dont_inline; } |
| void set_dont_inline(bool x) { _dont_inline = x; } |
| bool is_hidden() { return _hidden; } |
| void set_hidden(bool x) { _hidden = x; } |
| bool has_injected_profile() { return _has_injected_profile; } |
| void set_has_injected_profile(bool x) { _has_injected_profile = x; } |
| |
| ConstMethod::MethodType method_type() const { |
| return _constMethod->method_type(); |
| } |
| bool is_overpass() const { return method_type() == ConstMethod::OVERPASS; } |
| |
| // On-stack replacement support |
| bool has_osr_nmethod(int level, bool match_level) { |
| return method_holder()->lookup_osr_nmethod(this, InvocationEntryBci, level, match_level) != NULL; |
| } |
| |
| int mark_osr_nmethods() { |
| return method_holder()->mark_osr_nmethods(this); |
| } |
| |
| nmethod* lookup_osr_nmethod_for(int bci, int level, bool match_level) { |
| return method_holder()->lookup_osr_nmethod(this, bci, level, match_level); |
| } |
| |
| // 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_any) const; |
| void set_not_compilable(int comp_level = CompLevel_all, bool report = true, const char* reason = NULL); |
| void set_not_compilable_quietly(int comp_level = CompLevel_all) { |
| set_not_compilable(comp_level, false); |
| } |
| bool is_not_osr_compilable(int comp_level = CompLevel_any) const; |
| void set_not_osr_compilable(int comp_level = CompLevel_all, bool report = true, const char* reason = NULL); |
| void set_not_osr_compilable_quietly(int comp_level = CompLevel_all) { |
| set_not_osr_compilable(comp_level, false); |
| } |
| bool is_always_compilable() const; |
| |
| private: |
| void print_made_not_compilable(int comp_level, bool is_osr, bool report, const char* reason); |
| |
| public: |
| MethodCounters* get_method_counters(TRAPS) { |
| if (_method_counters == NULL) { |
| build_method_counters(this, CHECK_AND_CLEAR_NULL); |
| } |
| return _method_counters; |
| } |
| |
| bool is_not_c1_compilable() const { return access_flags().is_not_c1_compilable(); } |
| void set_not_c1_compilable() { _access_flags.set_not_c1_compilable(); } |
| void clear_not_c1_compilable() { _access_flags.clear_not_c1_compilable(); } |
| bool is_not_c2_compilable() const { return access_flags().is_not_c2_compilable(); } |
| void set_not_c2_compilable() { _access_flags.set_not_c2_compilable(); } |
| void clear_not_c2_compilable() { _access_flags.clear_not_c2_compilable(); } |
| |
| bool is_not_c1_osr_compilable() const { return is_not_c1_compilable(); } // don't waste an accessFlags bit |
| void set_not_c1_osr_compilable() { set_not_c1_compilable(); } // don't waste an accessFlags bit |
| void clear_not_c1_osr_compilable() { clear_not_c1_compilable(); } // don't waste an accessFlags bit |
| bool is_not_c2_osr_compilable() const { return access_flags().is_not_c2_osr_compilable(); } |
| void set_not_c2_osr_compilable() { _access_flags.set_not_c2_osr_compilable(); } |
| void clear_not_c2_osr_compilable() { _access_flags.clear_not_c2_osr_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(); } |
| |
| // 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 = tty); // prints as klassname::methodname; Exposed so field engineers can debug VM |
| #if INCLUDE_JVMTI |
| void print_name(outputStream* st = tty); // prints as "virtual void foo(int)"; exposed for TraceRedefineClasses |
| #else |
| void print_name(outputStream* st = tty) PRODUCT_RETURN; // prints as "virtual void foo(int)" |
| #endif |
| |
| // Helper routine used for method sorting |
| static void sort_methods(Array<Method*>* methods, bool idempotent = false, bool set_idnums = true); |
| |
| // Deallocation function for redefine classes or if an error occurs |
| void deallocate_contents(ClassLoaderData* loader_data); |
| |
| // Printing |
| #ifndef PRODUCT |
| void print_on(outputStream* st) const; |
| #endif |
| void print_value_on(outputStream* st) const; |
| |
| const char* internal_name() const { return "{method}"; } |
| |
| // Check for valid method pointer |
| static bool has_method_vptr(const void* ptr); |
| bool is_valid_method() const; |
| |
| // Verify |
| void verify() { verify_on(tty); } |
| void verify_on(outputStream* st); |
| |
| private: |
| |
| // 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; } |
| }; |
| |
| |
| // 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 by the windows compiler |
| #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<mtClass> { |
| 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(Method* 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(const Method* m, int bci) { |
| return bci == _bci && match(m); |
| } |
| |
| bool match(const Method* m) { |
| return _name_index == m->name_index() && |
| _signature_index == m->signature_index(); |
| } |
| |
| void set(Method* method); |
| void clear(Method* method); |
| }; |
| |
| // Utility class for access exception handlers |
| class ExceptionTable : public StackObj { |
| private: |
| ExceptionTableElement* _table; |
| u2 _length; |
| |
| public: |
| ExceptionTable(const Method* m) { |
| if (m->has_exception_handler()) { |
| _table = m->exception_table_start(); |
| _length = m->exception_table_length(); |
| } else { |
| _table = NULL; |
| _length = 0; |
| } |
| } |
| |
| int length() const { |
| return _length; |
| } |
| |
| u2 start_pc(int idx) const { |
| assert(idx < _length, "out of bounds"); |
| return _table[idx].start_pc; |
| } |
| |
| void set_start_pc(int idx, u2 value) { |
| assert(idx < _length, "out of bounds"); |
| _table[idx].start_pc = value; |
| } |
| |
| u2 end_pc(int idx) const { |
| assert(idx < _length, "out of bounds"); |
| return _table[idx].end_pc; |
| } |
| |
| void set_end_pc(int idx, u2 value) { |
| assert(idx < _length, "out of bounds"); |
| _table[idx].end_pc = value; |
| } |
| |
| u2 handler_pc(int idx) const { |
| assert(idx < _length, "out of bounds"); |
| return _table[idx].handler_pc; |
| } |
| |
| void set_handler_pc(int idx, u2 value) { |
| assert(idx < _length, "out of bounds"); |
| _table[idx].handler_pc = value; |
| } |
| |
| u2 catch_type_index(int idx) const { |
| assert(idx < _length, "out of bounds"); |
| return _table[idx].catch_type_index; |
| } |
| |
| void set_catch_type_index(int idx, u2 value) { |
| assert(idx < _length, "out of bounds"); |
| _table[idx].catch_type_index = value; |
| } |
| }; |
| |
| #endif // SHARE_VM_OOPS_METHODOOP_HPP |
