--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/oops/methodOop.hpp Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,739 @@
+/*
+ * Copyright 1997-2007 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:
+ // 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 relevent
+ // 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.
+ 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;
+
+ // 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(); }
+
+ // 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);
+};