jdk8-mips64-public/hotspot: comparison src/share/vm/oops/methodData.hpp

--1:000000000000
+:f90c822e73f8
+/*
+* Copyright (c) 2000, 2013, 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_METHODDATAOOP_HPP
+#define SHARE_VM_OOPS_METHODDATAOOP_HPP
+#include "interpreter/bytecodes.hpp"
+#include "memory/universe.hpp"
+#include "oops/method.hpp"
+#include "oops/oop.hpp"
+#include "runtime/orderAccess.hpp"
+class BytecodeStream;
+class KlassSizeStats;
+// The MethodData object collects counts and other profile information
+// during zeroth-tier (interpretive) and first-tier execution.
+// The profile is used later by compilation heuristics.  Some heuristics
+// enable use of aggressive (or "heroic") optimizations.  An aggressive
+// optimization often has a down-side, a corner case that it handles
+// poorly, but which is thought to be rare.  The profile provides
+// evidence of this rarity for a given method or even BCI.  It allows
+// the compiler to back out of the optimization at places where it
+// has historically been a poor choice.  Other heuristics try to use
+// specific information gathered about types observed at a given site.
+//
+// All data in the profile is approximate.  It is expected to be accurate
+// on the whole, but the system expects occasional inaccuraces, due to
+// counter overflow, multiprocessor races during data collection, space
+// limitations, missing MDO blocks, etc.  Bad or missing data will degrade
+// optimization quality but will not affect correctness.  Also, each MDO
+// is marked with its birth-date ("creation_mileage") which can be used
+// to assess the quality ("maturity") of its data.
+//
+// Short (<32-bit) counters are designed to overflow to a known "saturated"
+// state.  Also, certain recorded per-BCI events are given one-bit counters
+// which overflow to a saturated state which applied to all counters at
+// that BCI.  In other words, there is a small lattice which approximates
+// the ideal of an infinite-precision counter for each event at each BCI,
+// and the lattice quickly "bottoms out" in a state where all counters
+// are taken to be indefinitely large.
+//
+// The reader will find many data races in profile gathering code, starting
+// with invocation counter incrementation.  None of these races harm correct
+// execution of the compiled code.
+// forward decl
+class ProfileData;
+// DataLayout
+//
+// Overlay for generic profiling data.
+class DataLayout VALUE_OBJ_CLASS_SPEC {
+friend class VMStructs;
+private:
+// Every data layout begins with a header.  This header
+// contains a tag, which is used to indicate the size/layout
+// of the data, 4 bits of flags, which can be used in any way,
+// 4 bits of trap history (none/one reason/many reasons),
+// and a bci, which is used to tie this piece of data to a
+// specific bci in the bytecodes.
+union {
+intptr_t _bits;
+struct {
+u1 _tag;
+u1 _flags;
+u2 _bci;
+} _struct;
+} _header;
+// The data layout has an arbitrary number of cells, each sized
+// to accomodate a pointer or an integer.
+intptr_t _cells[1];
+// Some types of data layouts need a length field.
+static bool needs_array_len(u1 tag);
+public:
+enum {
+counter_increment = 1
+};
+enum {
+cell_size = sizeof(intptr_t)
+};
+// Tag values
+enum {
+no_tag,
+bit_data_tag,
+counter_data_tag,
+jump_data_tag,
+receiver_type_data_tag,
+virtual_call_data_tag,
+ret_data_tag,
+branch_data_tag,
+multi_branch_data_tag,
+arg_info_data_tag,
+call_type_data_tag,
+virtual_call_type_data_tag,
+parameters_type_data_tag,
+speculative_trap_data_tag
+};
+enum {
+// The _struct._flags word is formatted as [trap_state:4 | flags:4].
+// The trap state breaks down further as [recompile:1 | reason:3].
+// This further breakdown is defined in deoptimization.cpp.
+// See Deoptimization::trap_state_reason for an assert that
+// trap_bits is big enough to hold reasons < Reason_RECORDED_LIMIT.
+//
+// The trap_state is collected only if ProfileTraps is true.
+trap_bits = 1+3,  // 3: enough to distinguish [0..Reason_RECORDED_LIMIT].
+trap_shift = BitsPerByte - trap_bits,
+trap_mask = right_n_bits(trap_bits),
+trap_mask_in_place = (trap_mask << trap_shift),
+flag_limit = trap_shift,
+flag_mask = right_n_bits(flag_limit),
+first_flag = 0
+};
+// Size computation
+static int header_size_in_bytes() {
+return cell_size;
+}
+static int header_size_in_cells() {
+return 1;
+}
+static int compute_size_in_bytes(int cell_count) {
+return header_size_in_bytes() + cell_count * cell_size;
+}
+// Initialization
+void initialize(u1 tag, u2 bci, int cell_count);
+// Accessors
+u1 tag() {
+return _header._struct._tag;
+}
+// Return a few bits of trap state.  Range is [0..trap_mask].
+// The state tells if traps with zero, one, or many reasons have occurred.
+// It also tells whether zero or many recompilations have occurred.
+// The associated trap histogram in the MDO itself tells whether
+// traps are common or not.  If a BCI shows that a trap X has
+// occurred, and the MDO shows N occurrences of X, we make the
+// simplifying assumption that all N occurrences can be blamed
+// on that BCI.
+int trap_state() const {
+return ((_header._struct._flags >> trap_shift) & trap_mask);
+}
+void set_trap_state(int new_state) {
+assert(ProfileTraps, "used only under +ProfileTraps");
+uint old_flags = (_header._struct._flags & flag_mask);
+_header._struct._flags = (new_state << trap_shift) | old_flags;
+}
+u1 flags() const {
+return _header._struct._flags;
+}
+u2 bci() const {
+return _header._struct._bci;
+}
+void set_header(intptr_t value) {
+_header._bits = value;
+}
+intptr_t header() {
+return _header._bits;
+}
+void set_cell_at(int index, intptr_t value) {
+_cells[index] = value;
+}
+void release_set_cell_at(int index, intptr_t value) {
+OrderAccess::release_store_ptr(&_cells[index], value);
+}
+intptr_t cell_at(int index) const {
+return _cells[index];
+}
+void set_flag_at(int flag_number) {
+assert(flag_number < flag_limit, "oob");
+_header._struct._flags |= (0x1 << flag_number);
+}
+bool flag_at(int flag_number) const {
+assert(flag_number < flag_limit, "oob");
+return (_header._struct._flags & (0x1 << flag_number)) != 0;
+}
+// Low-level support for code generation.
+static ByteSize header_offset() {
+return byte_offset_of(DataLayout, _header);
+}
+static ByteSize tag_offset() {
+return byte_offset_of(DataLayout, _header._struct._tag);
+}
+static ByteSize flags_offset() {
+return byte_offset_of(DataLayout, _header._struct._flags);
+}
+static ByteSize bci_offset() {
+return byte_offset_of(DataLayout, _header._struct._bci);
+}
+static ByteSize cell_offset(int index) {
+return byte_offset_of(DataLayout, _cells) + in_ByteSize(index * cell_size);
+}
+#ifdef CC_INTERP
+static int cell_offset_in_bytes(int index) {
+return (int)offset_of(DataLayout, _cells[index]);
+}
+#endif // CC_INTERP
+// Return a value which, when or-ed as a byte into _flags, sets the flag.
+static int flag_number_to_byte_constant(int flag_number) {
+assert(0 <= flag_number && flag_number < flag_limit, "oob");
+DataLayout temp; temp.set_header(0);
+temp.set_flag_at(flag_number);
+return temp._header._struct._flags;
+}
+// Return a value which, when or-ed as a word into _header, sets the flag.
+static intptr_t flag_mask_to_header_mask(int byte_constant) {
+DataLayout temp; temp.set_header(0);
+temp._header._struct._flags = byte_constant;
+return temp._header._bits;
+}
+ProfileData* data_in();
+// GC support
+void clean_weak_klass_links(BoolObjectClosure* cl);
+};
+// ProfileData class hierarchy
+class ProfileData;
+class   BitData;
+class     CounterData;
+class       ReceiverTypeData;
+class         VirtualCallData;
+class           VirtualCallTypeData;
+class       RetData;
+class       CallTypeData;
+class   JumpData;
+class     BranchData;
+class   ArrayData;
+class     MultiBranchData;
+class     ArgInfoData;
+class     ParametersTypeData;
+class   SpeculativeTrapData;
+// ProfileData
+//
+// A ProfileData object is created to refer to a section of profiling
+// data in a structured way.
+class ProfileData : public ResourceObj {
+friend class TypeEntries;
+friend class ReturnTypeEntry;
+friend class TypeStackSlotEntries;
+private:
+#ifndef PRODUCT
+enum {
+tab_width_one = 16,
+tab_width_two = 36
+};
+#endif // !PRODUCT
+// This is a pointer to a section of profiling data.
+DataLayout* _data;
+char* print_data_on_helper(const MethodData* md) const;
+protected:
+DataLayout* data() { return _data; }
+const DataLayout* data() const { return _data; }
+enum {
+cell_size = DataLayout::cell_size
+};
+public:
+// How many cells are in this?
+virtual int cell_count() const {
+ShouldNotReachHere();
+return -1;
+}
+// Return the size of this data.
+int size_in_bytes() {
+return DataLayout::compute_size_in_bytes(cell_count());
+}
+protected:
+// Low-level accessors for underlying data
+void set_intptr_at(int index, intptr_t value) {
+assert(0 <= index && index < cell_count(), "oob");
+data()->set_cell_at(index, value);
+}
+void release_set_intptr_at(int index, intptr_t value) {
+assert(0 <= index && index < cell_count(), "oob");
+data()->release_set_cell_at(index, value);
+}
+intptr_t intptr_at(int index) const {
+assert(0 <= index && index < cell_count(), "oob");
+return data()->cell_at(index);
+}
+void set_uint_at(int index, uint value) {
+set_intptr_at(index, (intptr_t) value);
+}
+void release_set_uint_at(int index, uint value) {
+release_set_intptr_at(index, (intptr_t) value);
+}
+uint uint_at(int index) const {
+return (uint)intptr_at(index);
+}
+void set_int_at(int index, int value) {
+set_intptr_at(index, (intptr_t) value);
+}
+void release_set_int_at(int index, int value) {
+release_set_intptr_at(index, (intptr_t) value);
+}
+int int_at(int index) const {
+return (int)intptr_at(index);
+}
+int int_at_unchecked(int index) const {
+return (int)data()->cell_at(index);
+}
+void set_oop_at(int index, oop value) {
+set_intptr_at(index, cast_from_oop<intptr_t>(value));
+}
+oop oop_at(int index) const {
+return cast_to_oop(intptr_at(index));
+}
+void set_flag_at(int flag_number) {
+data()->set_flag_at(flag_number);
+}
+bool flag_at(int flag_number) const {
+return data()->flag_at(flag_number);
+}
+// two convenient imports for use by subclasses:
+static ByteSize cell_offset(int index) {
+return DataLayout::cell_offset(index);
+}
+static int flag_number_to_byte_constant(int flag_number) {
+return DataLayout::flag_number_to_byte_constant(flag_number);
+}
+ProfileData(DataLayout* data) {
+_data = data;
+}
+#ifdef CC_INTERP
+// Static low level accessors for DataLayout with ProfileData's semantics.
+static int cell_offset_in_bytes(int index) {
+return DataLayout::cell_offset_in_bytes(index);
+}
+static void increment_uint_at_no_overflow(DataLayout* layout, int index,
+int inc = DataLayout::counter_increment) {
+uint count = ((uint)layout->cell_at(index)) + inc;
+if (count == 0) return;
+layout->set_cell_at(index, (intptr_t) count);
+}
+static int int_at(DataLayout* layout, int index) {
+return (int)layout->cell_at(index);
+}
+static int uint_at(DataLayout* layout, int index) {
+return (uint)layout->cell_at(index);
+}
+static oop oop_at(DataLayout* layout, int index) {
+return cast_to_oop(layout->cell_at(index));
+}
+static void set_intptr_at(DataLayout* layout, int index, intptr_t value) {
+layout->set_cell_at(index, (intptr_t) value);
+}
+static void set_flag_at(DataLayout* layout, int flag_number) {
+layout->set_flag_at(flag_number);
+}
+#endif // CC_INTERP
+public:
+// Constructor for invalid ProfileData.
+ProfileData();
+u2 bci() const {
+return data()->bci();
+}
+address dp() {
+return (address)_data;
+}
+int trap_state() const {
+return data()->trap_state();
+}
+void set_trap_state(int new_state) {
+data()->set_trap_state(new_state);
+}
+// Type checking
+virtual bool is_BitData()         const { return false; }
+virtual bool is_CounterData()     const { return false; }
+virtual bool is_JumpData()        const { return false; }
+virtual bool is_ReceiverTypeData()const { return false; }
+virtual bool is_VirtualCallData() const { return false; }
+virtual bool is_RetData()         const { return false; }
+virtual bool is_BranchData()      const { return false; }
+virtual bool is_ArrayData()       const { return false; }
+virtual bool is_MultiBranchData() const { return false; }
+virtual bool is_ArgInfoData()     const { return false; }
+virtual bool is_CallTypeData()    const { return false; }
+virtual bool is_VirtualCallTypeData()const { return false; }
+virtual bool is_ParametersTypeData() const { return false; }
+virtual bool is_SpeculativeTrapData()const { return false; }
+BitData* as_BitData() const {
+assert(is_BitData(), "wrong type");
+return is_BitData()         ? (BitData*)        this : NULL;
+}
+CounterData* as_CounterData() const {
+assert(is_CounterData(), "wrong type");
+return is_CounterData()     ? (CounterData*)    this : NULL;
+}
+JumpData* as_JumpData() const {
+assert(is_JumpData(), "wrong type");
+return is_JumpData()        ? (JumpData*)       this : NULL;
+}
+ReceiverTypeData* as_ReceiverTypeData() const {
+assert(is_ReceiverTypeData(), "wrong type");
+return is_ReceiverTypeData() ? (ReceiverTypeData*)this : NULL;
+}
+VirtualCallData* as_VirtualCallData() const {
+assert(is_VirtualCallData(), "wrong type");
+return is_VirtualCallData() ? (VirtualCallData*)this : NULL;
+}
+RetData* as_RetData() const {
+assert(is_RetData(), "wrong type");
+return is_RetData()         ? (RetData*)        this : NULL;
+}
+BranchData* as_BranchData() const {
+assert(is_BranchData(), "wrong type");
+return is_BranchData()      ? (BranchData*)     this : NULL;
+}
+ArrayData* as_ArrayData() const {
+assert(is_ArrayData(), "wrong type");
+return is_ArrayData()       ? (ArrayData*)      this : NULL;
+}
+MultiBranchData* as_MultiBranchData() const {
+assert(is_MultiBranchData(), "wrong type");
+return is_MultiBranchData() ? (MultiBranchData*)this : NULL;
+}
+ArgInfoData* as_ArgInfoData() const {
+assert(is_ArgInfoData(), "wrong type");
+return is_ArgInfoData() ? (ArgInfoData*)this : NULL;
+}
+CallTypeData* as_CallTypeData() const {
+assert(is_CallTypeData(), "wrong type");
+return is_CallTypeData() ? (CallTypeData*)this : NULL;
+}
+VirtualCallTypeData* as_VirtualCallTypeData() const {
+assert(is_VirtualCallTypeData(), "wrong type");
+return is_VirtualCallTypeData() ? (VirtualCallTypeData*)this : NULL;
+}
+ParametersTypeData* as_ParametersTypeData() const {
+assert(is_ParametersTypeData(), "wrong type");
+return is_ParametersTypeData() ? (ParametersTypeData*)this : NULL;
+}
+SpeculativeTrapData* as_SpeculativeTrapData() const {
+assert(is_SpeculativeTrapData(), "wrong type");
+return is_SpeculativeTrapData() ? (SpeculativeTrapData*)this : NULL;
+}
+// Subclass specific initialization
+virtual void post_initialize(BytecodeStream* stream, MethodData* mdo) {}
+// GC support
+virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) {}
+// CI translation: ProfileData can represent both MethodDataOop data
+// as well as CIMethodData data. This function is provided for translating
+// an oop in a ProfileData to the ci equivalent. Generally speaking,
+// most ProfileData don't require any translation, so we provide the null
+// translation here, and the required translators are in the ci subclasses.
+virtual void translate_from(const ProfileData* data) {}
+virtual void print_data_on(outputStream* st, const char* extra = NULL) const {
+ShouldNotReachHere();
+}
+void print_data_on(outputStream* st, const MethodData* md) const;
+#ifndef PRODUCT
+void print_shared(outputStream* st, const char* name, const char* extra) const;
+void tab(outputStream* st, bool first = false) const;
+#endif
+};
+// BitData
+//
+// A BitData holds a flag or two in its header.
+class BitData : public ProfileData {
+protected:
+enum {
+// null_seen:
+//  saw a null operand (cast/aastore/instanceof)
+null_seen_flag              = DataLayout::first_flag + 0
+};
+enum { bit_cell_count = 0 };  // no additional data fields needed.
+public:
+BitData(DataLayout* layout) : ProfileData(layout) {
+}
+virtual bool is_BitData() const { return true; }
+static int static_cell_count() {
+return bit_cell_count;
+}
+virtual int cell_count() const {
+return static_cell_count();
+}
+// Accessor
+// The null_seen flag bit is specially known to the interpreter.
+// Consulting it allows the compiler to avoid setting up null_check traps.
+bool null_seen()     { return flag_at(null_seen_flag); }
+void set_null_seen()    { set_flag_at(null_seen_flag); }
+// Code generation support
+static int null_seen_byte_constant() {
+return flag_number_to_byte_constant(null_seen_flag);
+}
+static ByteSize bit_data_size() {
+return cell_offset(bit_cell_count);
+}
+#ifdef CC_INTERP
+static int bit_data_size_in_bytes() {
+return cell_offset_in_bytes(bit_cell_count);
+}
+static void set_null_seen(DataLayout* layout) {
+set_flag_at(layout, null_seen_flag);
+}
+static DataLayout* advance(DataLayout* layout) {
+return (DataLayout*) (((address)layout) + (ssize_t)BitData::bit_data_size_in_bytes());
+}
+#endif // CC_INTERP
+#ifndef PRODUCT
+void print_data_on(outputStream* st, const char* extra = NULL) const;
+#endif
+};
+// CounterData
+//
+// A CounterData corresponds to a simple counter.
+class CounterData : public BitData {
+protected:
+enum {
+count_off,
+counter_cell_count
+};
+public:
+CounterData(DataLayout* layout) : BitData(layout) {}
+virtual bool is_CounterData() const { return true; }
+static int static_cell_count() {
+return counter_cell_count;
+}
+virtual int cell_count() const {
+return static_cell_count();
+}
+// Direct accessor
+uint count() const {
+return uint_at(count_off);
+}
+// Code generation support
+static ByteSize count_offset() {
+return cell_offset(count_off);
+}
+static ByteSize counter_data_size() {
+return cell_offset(counter_cell_count);
+}
+void set_count(uint count) {
+set_uint_at(count_off, count);
+}
+#ifdef CC_INTERP
+static int counter_data_size_in_bytes() {
+return cell_offset_in_bytes(counter_cell_count);
+}
+static void increment_count_no_overflow(DataLayout* layout) {
+increment_uint_at_no_overflow(layout, count_off);
+}
+// Support counter decrementation at checkcast / subtype check failed.
+static void decrement_count(DataLayout* layout) {
+increment_uint_at_no_overflow(layout, count_off, -1);
+}
+static DataLayout* advance(DataLayout* layout) {
+return (DataLayout*) (((address)layout) + (ssize_t)CounterData::counter_data_size_in_bytes());
+}
+#endif // CC_INTERP
+#ifndef PRODUCT
+void print_data_on(outputStream* st, const char* extra = NULL) const;
+#endif
+};
+// JumpData
+//
+// A JumpData is used to access profiling information for a direct
+// branch.  It is a counter, used for counting the number of branches,
+// plus a data displacement, used for realigning the data pointer to
+// the corresponding target bci.
+class JumpData : public ProfileData {
+protected:
+enum {
+taken_off_set,
+displacement_off_set,
+jump_cell_count
+};
+void set_displacement(int displacement) {
+set_int_at(displacement_off_set, displacement);
+}
+public:
+JumpData(DataLayout* layout) : ProfileData(layout) {
+assert(layout->tag() == DataLayout::jump_data_tag ||
+layout->tag() == DataLayout::branch_data_tag, "wrong type");
+}
+virtual bool is_JumpData() const { return true; }
+static int static_cell_count() {
+return jump_cell_count;
+}
+virtual int cell_count() const {
+return static_cell_count();
+}
+// Direct accessor
+uint taken() const {
+return uint_at(taken_off_set);
+}
+void set_taken(uint cnt) {
+set_uint_at(taken_off_set, cnt);
+}
+// Saturating counter
+uint inc_taken() {
+uint cnt = taken() + 1;
+// Did we wrap? Will compiler screw us??
+if (cnt == 0) cnt--;
+set_uint_at(taken_off_set, cnt);
+return cnt;
+}
+int displacement() const {
+return int_at(displacement_off_set);
+}
+// Code generation support
+static ByteSize taken_offset() {
+return cell_offset(taken_off_set);
+}
+static ByteSize displacement_offset() {
+return cell_offset(displacement_off_set);
+}
+#ifdef CC_INTERP
+static void increment_taken_count_no_overflow(DataLayout* layout) {
+increment_uint_at_no_overflow(layout, taken_off_set);
+}
+static DataLayout* advance_taken(DataLayout* layout) {
+return (DataLayout*) (((address)layout) + (ssize_t)int_at(layout, displacement_off_set));
+}
+static uint taken_count(DataLayout* layout) {
+return (uint) uint_at(layout, taken_off_set);
+}
+#endif // CC_INTERP
+// Specific initialization.
+void post_initialize(BytecodeStream* stream, MethodData* mdo);
+#ifndef PRODUCT
+void print_data_on(outputStream* st, const char* extra = NULL) const;
+#endif
+};
+// Entries in a ProfileData object to record types: it can either be
+// none (no profile), unknown (conflicting profile data) or a klass if
+// a single one is seen. Whether a null reference was seen is also
+// recorded. No counter is associated with the type and a single type
+// is tracked (unlike VirtualCallData).
+class TypeEntries {
+public:
+// A single cell is used to record information for a type:
+// - the cell is initialized to 0
+// - when a type is discovered it is stored in the cell
+// - bit zero of the cell is used to record whether a null reference
+// was encountered or not
+// - bit 1 is set to record a conflict in the type information
+enum {
+null_seen = 1,
+type_mask = ~null_seen,
+type_unknown = 2,
+status_bits = null_seen | type_unknown,
+type_klass_mask = ~status_bits
+};
+// what to initialize a cell to
+static intptr_t type_none() {
+return 0;
+}
+// null seen = bit 0 set?
+static bool was_null_seen(intptr_t v) {
+return (v & null_seen) != 0;
+}
+// conflicting type information = bit 1 set?
+static bool is_type_unknown(intptr_t v) {
+return (v & type_unknown) != 0;
+}
+// not type information yet = all bits cleared, ignoring bit 0?
+static bool is_type_none(intptr_t v) {
+return (v & type_mask) == 0;
+}
+// recorded type: cell without bit 0 and 1
+static intptr_t klass_part(intptr_t v) {
+intptr_t r = v & type_klass_mask;
+return r;
+}
+// type recorded
+static Klass* valid_klass(intptr_t k) {
+if (!is_type_none(k) &&
+!is_type_unknown(k)) {
+Klass* res = (Klass*)klass_part(k);
+assert(res != NULL, "invalid");
+return res;
+} else {
+return NULL;
+}
+}
+static intptr_t with_status(intptr_t k, intptr_t in) {
+return k | (in & status_bits);
+}
+static intptr_t with_status(Klass* k, intptr_t in) {
+return with_status((intptr_t)k, in);
+}
+#ifndef PRODUCT
+static void print_klass(outputStream* st, intptr_t k);
+#endif
+// GC support
+static bool is_loader_alive(BoolObjectClosure* is_alive_cl, intptr_t p);
+protected:
+// ProfileData object these entries are part of
+ProfileData* _pd;
+// offset within the ProfileData object where the entries start
+const int _base_off;
+TypeEntries(int base_off)
+: _base_off(base_off), _pd(NULL) {}
+void set_intptr_at(int index, intptr_t value) {
+_pd->set_intptr_at(index, value);
+}
+intptr_t intptr_at(int index) const {
+return _pd->intptr_at(index);
+}
+public:
+void set_profile_data(ProfileData* pd) {
+_pd = pd;
+}
+};
+// Type entries used for arguments passed at a call and parameters on
+// method entry. 2 cells per entry: one for the type encoded as in
+// TypeEntries and one initialized with the stack slot where the
+// profiled object is to be found so that the interpreter can locate
+// it quickly.
+class TypeStackSlotEntries : public TypeEntries {
+private:
+enum {
+stack_slot_entry,
+type_entry,
+per_arg_cell_count
+};
+// offset of cell for stack slot for entry i within ProfileData object
+int stack_slot_offset(int i) const {
+return _base_off + stack_slot_local_offset(i);
+}
+protected:
+const int _number_of_entries;
+// offset of cell for type for entry i within ProfileData object
+int type_offset(int i) const {
+return _base_off + type_local_offset(i);
+}
+public:
+TypeStackSlotEntries(int base_off, int nb_entries)
+: TypeEntries(base_off), _number_of_entries(nb_entries) {}
+static int compute_cell_count(Symbol* signature, bool include_receiver, int max);
+void post_initialize(Symbol* signature, bool has_receiver, bool include_receiver);
+// offset of cell for stack slot for entry i within this block of cells for a TypeStackSlotEntries
+static int stack_slot_local_offset(int i) {
+return i * per_arg_cell_count + stack_slot_entry;
+}
+// offset of cell for type for entry i within this block of cells for a TypeStackSlotEntries
+static int type_local_offset(int i) {
+return i * per_arg_cell_count + type_entry;
+}
+// stack slot for entry i
+uint stack_slot(int i) const {
+assert(i >= 0 && i < _number_of_entries, "oob");
+return _pd->uint_at(stack_slot_offset(i));
+}
+// set stack slot for entry i
+void set_stack_slot(int i, uint num) {
+assert(i >= 0 && i < _number_of_entries, "oob");
+_pd->set_uint_at(stack_slot_offset(i), num);
+}
+// type for entry i
+intptr_t type(int i) const {
+assert(i >= 0 && i < _number_of_entries, "oob");
+return _pd->intptr_at(type_offset(i));
+}
+// set type for entry i
+void set_type(int i, intptr_t k) {
+assert(i >= 0 && i < _number_of_entries, "oob");
+_pd->set_intptr_at(type_offset(i), k);
+}
+static ByteSize per_arg_size() {
+return in_ByteSize(per_arg_cell_count * DataLayout::cell_size);
+}
+static int per_arg_count() {
+return per_arg_cell_count ;
+}
+// GC support
+void clean_weak_klass_links(BoolObjectClosure* is_alive_closure);
+#ifndef PRODUCT
+void print_data_on(outputStream* st) const;
+#endif
+};
+// Type entry used for return from a call. A single cell to record the
+// type.
+class ReturnTypeEntry : public TypeEntries {
+private:
+enum {
+cell_count = 1
+};
+public:
+ReturnTypeEntry(int base_off)
+: TypeEntries(base_off) {}
+void post_initialize() {
+set_type(type_none());
+}
+intptr_t type() const {
+return _pd->intptr_at(_base_off);
+}
+void set_type(intptr_t k) {
+_pd->set_intptr_at(_base_off, k);
+}
+static int static_cell_count() {
+return cell_count;
+}
+static ByteSize size() {
+return in_ByteSize(cell_count * DataLayout::cell_size);
+}
+ByteSize type_offset() {
+return DataLayout::cell_offset(_base_off);
+}
+// GC support
+void clean_weak_klass_links(BoolObjectClosure* is_alive_closure);
+#ifndef PRODUCT
+void print_data_on(outputStream* st) const;
+#endif
+};
+// Entries to collect type information at a call: contains arguments
+// (TypeStackSlotEntries), a return type (ReturnTypeEntry) and a
+// number of cells. Because the number of cells for the return type is
+// smaller than the number of cells for the type of an arguments, the
+// number of cells is used to tell how many arguments are profiled and
+// whether a return value is profiled. See has_arguments() and
+// has_return().
+class TypeEntriesAtCall {
+private:
+static int stack_slot_local_offset(int i) {
+return header_cell_count() + TypeStackSlotEntries::stack_slot_local_offset(i);
+}
+static int argument_type_local_offset(int i) {
+return header_cell_count() + TypeStackSlotEntries::type_local_offset(i);;
+}
+public:
+static int header_cell_count() {
+return 1;
+}
+static int cell_count_local_offset() {
+return 0;
+}
+static int compute_cell_count(BytecodeStream* stream);
+static void initialize(DataLayout* dl, int base, int cell_count) {
+int off = base + cell_count_local_offset();
+dl->set_cell_at(off, cell_count - base - header_cell_count());
+}
+static bool arguments_profiling_enabled();
+static bool return_profiling_enabled();
+// Code generation support
+static ByteSize cell_count_offset() {
+return in_ByteSize(cell_count_local_offset() * DataLayout::cell_size);
+}
+static ByteSize args_data_offset() {
+return in_ByteSize(header_cell_count() * DataLayout::cell_size);
+}
+static ByteSize stack_slot_offset(int i) {
+return in_ByteSize(stack_slot_local_offset(i) * DataLayout::cell_size);
+}
+static ByteSize argument_type_offset(int i) {
+return in_ByteSize(argument_type_local_offset(i) * DataLayout::cell_size);
+}
+static ByteSize return_only_size() {
+return ReturnTypeEntry::size() + in_ByteSize(header_cell_count() * DataLayout::cell_size);
+}
+};
+// CallTypeData
+//
+// A CallTypeData is used to access profiling information about a non
+// virtual call for which we collect type information about arguments
+// and return value.
+class CallTypeData : public CounterData {
+private:
+// entries for arguments if any
+TypeStackSlotEntries _args;
+// entry for return type if any
+ReturnTypeEntry _ret;
+int cell_count_global_offset() const {
+return CounterData::static_cell_count() + TypeEntriesAtCall::cell_count_local_offset();
+}
+// number of cells not counting the header
+int cell_count_no_header() const {
+return uint_at(cell_count_global_offset());
+}
+void check_number_of_arguments(int total) {
+assert(number_of_arguments() == total, "should be set in DataLayout::initialize");
+}
+public:
+CallTypeData(DataLayout* layout) :
+CounterData(layout),
+_args(CounterData::static_cell_count()+TypeEntriesAtCall::header_cell_count(), number_of_arguments()),
+_ret(cell_count() - ReturnTypeEntry::static_cell_count())
+{
+assert(layout->tag() == DataLayout::call_type_data_tag, "wrong type");
+// Some compilers (VC++) don't want this passed in member initialization list
+_args.set_profile_data(this);
+_ret.set_profile_data(this);
+}
+const TypeStackSlotEntries* args() const {
+assert(has_arguments(), "no profiling of arguments");
+return &_args;
+}
+const ReturnTypeEntry* ret() const {
+assert(has_return(), "no profiling of return value");
+return &_ret;
+}
+virtual bool is_CallTypeData() const { return true; }
+static int static_cell_count() {
+return -1;
+}
+static int compute_cell_count(BytecodeStream* stream) {
+return CounterData::static_cell_count() + TypeEntriesAtCall::compute_cell_count(stream);
+}
+static void initialize(DataLayout* dl, int cell_count) {
+TypeEntriesAtCall::initialize(dl, CounterData::static_cell_count(), cell_count);
+}
+virtual void post_initialize(BytecodeStream* stream, MethodData* mdo);
+virtual int cell_count() const {
+return CounterData::static_cell_count() +
+TypeEntriesAtCall::header_cell_count() +
+int_at_unchecked(cell_count_global_offset());
+}
+int number_of_arguments() const {
+return cell_count_no_header() / TypeStackSlotEntries::per_arg_count();
+}
+void set_argument_type(int i, Klass* k) {
+assert(has_arguments(), "no arguments!");
+intptr_t current = _args.type(i);
+_args.set_type(i, TypeEntries::with_status(k, current));
+}
+void set_return_type(Klass* k) {
+assert(has_return(), "no return!");
+intptr_t current = _ret.type();
+_ret.set_type(TypeEntries::with_status(k, current));
+}
+// An entry for a return value takes less space than an entry for an
+// argument so if the number of cells exceeds the number of cells
+// needed for an argument, this object contains type information for
+// at least one argument.
+bool has_arguments() const {
+bool res = cell_count_no_header() >= TypeStackSlotEntries::per_arg_count();
+assert (!res || TypeEntriesAtCall::arguments_profiling_enabled(), "no profiling of arguments");
+return res;
+}
+// An entry for a return value takes less space than an entry for an
+// argument, so if the remainder of the number of cells divided by
+// the number of cells for an argument is not null, a return value
+// is profiled in this object.
+bool has_return() const {
+bool res = (cell_count_no_header() % TypeStackSlotEntries::per_arg_count()) != 0;
+assert (!res || TypeEntriesAtCall::return_profiling_enabled(), "no profiling of return values");
+return res;
+}
+// Code generation support
+static ByteSize args_data_offset() {
+return cell_offset(CounterData::static_cell_count()) + TypeEntriesAtCall::args_data_offset();
+}
+// GC support
+virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) {
+if (has_arguments()) {
+_args.clean_weak_klass_links(is_alive_closure);
+}
+if (has_return()) {
+_ret.clean_weak_klass_links(is_alive_closure);
+}
+}
+#ifndef PRODUCT
+virtual void print_data_on(outputStream* st, const char* extra = NULL) const;
+#endif
+};
+// ReceiverTypeData
+//
+// A ReceiverTypeData is used to access profiling information about a
+// dynamic type check.  It consists of a counter which counts the total times
+// that the check is reached, and a series of (Klass*, count) pairs
+// which are used to store a type profile for the receiver of the check.
+class ReceiverTypeData : public CounterData {
+protected:
+enum {
+receiver0_offset = counter_cell_count,
+count0_offset,
+receiver_type_row_cell_count = (count0_offset + 1) - receiver0_offset
+};
+public:
+ReceiverTypeData(DataLayout* layout) : CounterData(layout) {
+assert(layout->tag() == DataLayout::receiver_type_data_tag ||
+layout->tag() == DataLayout::virtual_call_data_tag ||
+layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type");
+}
+virtual bool is_ReceiverTypeData() const { return true; }
+static int static_cell_count() {
+return counter_cell_count + (uint) TypeProfileWidth * receiver_type_row_cell_count;
+}
+virtual int cell_count() const {
+return static_cell_count();
+}
+// Direct accessors
+static uint row_limit() {
+return TypeProfileWidth;
+}
+static int receiver_cell_index(uint row) {
+return receiver0_offset + row * receiver_type_row_cell_count;
+}
+static int receiver_count_cell_index(uint row) {
+return count0_offset + row * receiver_type_row_cell_count;
+}
+Klass* receiver(uint row) const {
+assert(row < row_limit(), "oob");
+Klass* recv = (Klass*)intptr_at(receiver_cell_index(row));
+assert(recv == NULL || recv->is_klass(), "wrong type");
+return recv;
+}
+void set_receiver(uint row, Klass* k) {
+assert((uint)row < row_limit(), "oob");
+set_intptr_at(receiver_cell_index(row), (uintptr_t)k);
+}
+uint receiver_count(uint row) const {
+assert(row < row_limit(), "oob");
+return uint_at(receiver_count_cell_index(row));
+}
+void set_receiver_count(uint row, uint count) {
+assert(row < row_limit(), "oob");
+set_uint_at(receiver_count_cell_index(row), count);
+}
+void clear_row(uint row) {
+assert(row < row_limit(), "oob");
+// Clear total count - indicator of polymorphic call site.
+// The site may look like as monomorphic after that but
+// it allow to have more accurate profiling information because
+// there was execution phase change since klasses were unloaded.
+// If the site is still polymorphic then MDO will be updated
+// to reflect it. But it could be the case that the site becomes
+// only bimorphic. Then keeping total count not 0 will be wrong.
+// Even if we use monomorphic (when it is not) for compilation
+// we will only have trap, deoptimization and recompile again
+// with updated MDO after executing method in Interpreter.
+// An additional receiver will be recorded in the cleaned row
+// during next call execution.
+//
+// Note: our profiling logic works with empty rows in any slot.
+// We do sorting a profiling info (ciCallProfile) for compilation.
+//
+set_count(0);
+set_receiver(row, NULL);
+set_receiver_count(row, 0);
+}
+// Code generation support
+static ByteSize receiver_offset(uint row) {
+return cell_offset(receiver_cell_index(row));
+}
+static ByteSize receiver_count_offset(uint row) {
+return cell_offset(receiver_count_cell_index(row));
+}
+static ByteSize receiver_type_data_size() {
+return cell_offset(static_cell_count());
+}
+// GC support
+virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure);
+#ifdef CC_INTERP
+static int receiver_type_data_size_in_bytes() {
+return cell_offset_in_bytes(static_cell_count());
+}
+static Klass *receiver_unchecked(DataLayout* layout, uint row) {
+Klass* recv = (Klass*)layout->cell_at(receiver_cell_index(row));
+return recv;
+}
+static void increment_receiver_count_no_overflow(DataLayout* layout, Klass *rcvr) {
+const int num_rows = row_limit();
+// Receiver already exists?
+for (int row = 0; row < num_rows; row++) {
+if (receiver_unchecked(layout, row) == rcvr) {
+increment_uint_at_no_overflow(layout, receiver_count_cell_index(row));
+return;
+}
+}
+// New receiver, find a free slot.
+for (int row = 0; row < num_rows; row++) {
+if (receiver_unchecked(layout, row) == NULL) {
+set_intptr_at(layout, receiver_cell_index(row), (intptr_t)rcvr);
+increment_uint_at_no_overflow(layout, receiver_count_cell_index(row));
+return;
+}
+}
+// Receiver did not match any saved receiver and there is no empty row for it.
+// Increment total counter to indicate polymorphic case.
+increment_count_no_overflow(layout);
+}
+static DataLayout* advance(DataLayout* layout) {
+return (DataLayout*) (((address)layout) + (ssize_t)ReceiverTypeData::receiver_type_data_size_in_bytes());
+}
+#endif // CC_INTERP
+#ifndef PRODUCT
+void print_receiver_data_on(outputStream* st) const;
+void print_data_on(outputStream* st, const char* extra = NULL) const;
+#endif
+};
+// VirtualCallData
+//
+// A VirtualCallData is used to access profiling information about a
+// virtual call.  For now, it has nothing more than a ReceiverTypeData.
+class VirtualCallData : public ReceiverTypeData {
+public:
+VirtualCallData(DataLayout* layout) : ReceiverTypeData(layout) {
+assert(layout->tag() == DataLayout::virtual_call_data_tag ||
+layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type");
+}
+virtual bool is_VirtualCallData() const { return true; }
+static int static_cell_count() {
+// At this point we could add more profile state, e.g., for arguments.
+// But for now it's the same size as the base record type.
+return ReceiverTypeData::static_cell_count();
+}
+virtual int cell_count() const {
+return static_cell_count();
+}
+// Direct accessors
+static ByteSize virtual_call_data_size() {
+return cell_offset(static_cell_count());
+}
+#ifdef CC_INTERP
+static int virtual_call_data_size_in_bytes() {
+return cell_offset_in_bytes(static_cell_count());
+}
+static DataLayout* advance(DataLayout* layout) {
+return (DataLayout*) (((address)layout) + (ssize_t)VirtualCallData::virtual_call_data_size_in_bytes());
+}
+#endif // CC_INTERP
+#ifndef PRODUCT
+void print_data_on(outputStream* st, const char* extra = NULL) const;
+#endif
+};
+// VirtualCallTypeData
+//
+// A VirtualCallTypeData is used to access profiling information about
+// a virtual call for which we collect type information about
+// arguments and return value.
+class VirtualCallTypeData : public VirtualCallData {
+private:
+// entries for arguments if any
+TypeStackSlotEntries _args;
+// entry for return type if any
+ReturnTypeEntry _ret;
+int cell_count_global_offset() const {
+return VirtualCallData::static_cell_count() + TypeEntriesAtCall::cell_count_local_offset();
+}
+// number of cells not counting the header
+int cell_count_no_header() const {
+return uint_at(cell_count_global_offset());
+}
+void check_number_of_arguments(int total) {
+assert(number_of_arguments() == total, "should be set in DataLayout::initialize");
+}
+public:
+VirtualCallTypeData(DataLayout* layout) :
+VirtualCallData(layout),
+_args(VirtualCallData::static_cell_count()+TypeEntriesAtCall::header_cell_count(), number_of_arguments()),
+_ret(cell_count() - ReturnTypeEntry::static_cell_count())
+{
+assert(layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type");
+// Some compilers (VC++) don't want this passed in member initialization list
+_args.set_profile_data(this);
+_ret.set_profile_data(this);
+}
+const TypeStackSlotEntries* args() const {
+assert(has_arguments(), "no profiling of arguments");
+return &_args;
+}
+const ReturnTypeEntry* ret() const {
+assert(has_return(), "no profiling of return value");
+return &_ret;
+}
+virtual bool is_VirtualCallTypeData() const { return true; }
+static int static_cell_count() {
+return -1;
+}
+static int compute_cell_count(BytecodeStream* stream) {
+return VirtualCallData::static_cell_count() + TypeEntriesAtCall::compute_cell_count(stream);
+}
+static void initialize(DataLayout* dl, int cell_count) {
+TypeEntriesAtCall::initialize(dl, VirtualCallData::static_cell_count(), cell_count);
+}
+virtual void post_initialize(BytecodeStream* stream, MethodData* mdo);
+virtual int cell_count() const {
+return VirtualCallData::static_cell_count() +
+TypeEntriesAtCall::header_cell_count() +
+int_at_unchecked(cell_count_global_offset());
+}
+int number_of_arguments() const {
+return cell_count_no_header() / TypeStackSlotEntries::per_arg_count();
+}
+void set_argument_type(int i, Klass* k) {
+assert(has_arguments(), "no arguments!");
+intptr_t current = _args.type(i);
+_args.set_type(i, TypeEntries::with_status(k, current));
+}
+void set_return_type(Klass* k) {
+assert(has_return(), "no return!");
+intptr_t current = _ret.type();
+_ret.set_type(TypeEntries::with_status(k, current));
+}
+// An entry for a return value takes less space than an entry for an
+// argument, so if the remainder of the number of cells divided by
+// the number of cells for an argument is not null, a return value
+// is profiled in this object.
+bool has_return() const {
+bool res = (cell_count_no_header() % TypeStackSlotEntries::per_arg_count()) != 0;
+assert (!res || TypeEntriesAtCall::return_profiling_enabled(), "no profiling of return values");
+return res;
+}
+// An entry for a return value takes less space than an entry for an
+// argument so if the number of cells exceeds the number of cells
+// needed for an argument, this object contains type information for
+// at least one argument.
+bool has_arguments() const {
+bool res = cell_count_no_header() >= TypeStackSlotEntries::per_arg_count();
+assert (!res || TypeEntriesAtCall::arguments_profiling_enabled(), "no profiling of arguments");
+return res;
+}
+// Code generation support
+static ByteSize args_data_offset() {
+return cell_offset(VirtualCallData::static_cell_count()) + TypeEntriesAtCall::args_data_offset();
+}
+// GC support
+virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) {
+ReceiverTypeData::clean_weak_klass_links(is_alive_closure);
+if (has_arguments()) {
+_args.clean_weak_klass_links(is_alive_closure);
+}
+if (has_return()) {
+_ret.clean_weak_klass_links(is_alive_closure);
+}
+}
+#ifndef PRODUCT
+virtual void print_data_on(outputStream* st, const char* extra = NULL) const;
+#endif
+};
+// RetData
+//
+// A RetData is used to access profiling information for a ret bytecode.
+// It is composed of a count of the number of times that the ret has
+// been executed, followed by a series of triples of the form
+// (bci, count, di) which count the number of times that some bci was the
+// target of the ret and cache a corresponding data displacement.
+class RetData : public CounterData {
+protected:
+enum {
+bci0_offset = counter_cell_count,
+count0_offset,
+displacement0_offset,
+ret_row_cell_count = (displacement0_offset + 1) - bci0_offset
+};
+void set_bci(uint row, int bci) {
+assert((uint)row < row_limit(), "oob");
+set_int_at(bci0_offset + row * ret_row_cell_count, bci);
+}
+void release_set_bci(uint row, int bci) {
+assert((uint)row < row_limit(), "oob");
+// 'release' when setting the bci acts as a valid flag for other
+// threads wrt bci_count and bci_displacement.
+release_set_int_at(bci0_offset + row * ret_row_cell_count, bci);
+}
+void set_bci_count(uint row, uint count) {
+assert((uint)row < row_limit(), "oob");
+set_uint_at(count0_offset + row * ret_row_cell_count, count);
+}
+void set_bci_displacement(uint row, int disp) {
+set_int_at(displacement0_offset + row * ret_row_cell_count, disp);
+}
+public:
+RetData(DataLayout* layout) : CounterData(layout) {
+assert(layout->tag() == DataLayout::ret_data_tag, "wrong type");
+}
+virtual bool is_RetData() const { return true; }
+enum {
+no_bci = -1 // value of bci when bci1/2 are not in use.
+};
+static int static_cell_count() {
+return counter_cell_count + (uint) BciProfileWidth * ret_row_cell_count;
+}
+virtual int cell_count() const {
+return static_cell_count();
+}
+static uint row_limit() {
+return BciProfileWidth;
+}
+static int bci_cell_index(uint row) {
+return bci0_offset + row * ret_row_cell_count;
+}
+static int bci_count_cell_index(uint row) {
+return count0_offset + row * ret_row_cell_count;
+}
+static int bci_displacement_cell_index(uint row) {
+return displacement0_offset + row * ret_row_cell_count;
+}
+// Direct accessors
+int bci(uint row) const {
+return int_at(bci_cell_index(row));
+}
+uint bci_count(uint row) const {
+return uint_at(bci_count_cell_index(row));
+}
+int bci_displacement(uint row) const {
+return int_at(bci_displacement_cell_index(row));
+}
+// Interpreter Runtime support
+address fixup_ret(int return_bci, MethodData* mdo);
+// Code generation support
+static ByteSize bci_offset(uint row) {
+return cell_offset(bci_cell_index(row));
+}
+static ByteSize bci_count_offset(uint row) {
+return cell_offset(bci_count_cell_index(row));
+}
+static ByteSize bci_displacement_offset(uint row) {
+return cell_offset(bci_displacement_cell_index(row));
+}
+#ifdef CC_INTERP
+static DataLayout* advance(MethodData *md, int bci);
+#endif // CC_INTERP
+// Specific initialization.
+void post_initialize(BytecodeStream* stream, MethodData* mdo);
+#ifndef PRODUCT
+void print_data_on(outputStream* st, const char* extra = NULL) const;
+#endif
+};
+// BranchData
+//
+// A BranchData is used to access profiling data for a two-way branch.
+// It consists of taken and not_taken counts as well as a data displacement
+// for the taken case.
+class BranchData : public JumpData {
+protected:
+enum {
+not_taken_off_set = jump_cell_count,
+branch_cell_count
+};
+void set_displacement(int displacement) {
+set_int_at(displacement_off_set, displacement);
+}
+public:
+BranchData(DataLayout* layout) : JumpData(layout) {
+assert(layout->tag() == DataLayout::branch_data_tag, "wrong type");
+}
+virtual bool is_BranchData() const { return true; }
+static int static_cell_count() {
+return branch_cell_count;
+}
+virtual int cell_count() const {
+return static_cell_count();
+}
+// Direct accessor
+uint not_taken() const {
+return uint_at(not_taken_off_set);
+}
+void set_not_taken(uint cnt) {
+set_uint_at(not_taken_off_set, cnt);
+}
+uint inc_not_taken() {
+uint cnt = not_taken() + 1;
+// Did we wrap? Will compiler screw us??
+if (cnt == 0) cnt--;
+set_uint_at(not_taken_off_set, cnt);
+return cnt;
+}
+// Code generation support
+static ByteSize not_taken_offset() {
+return cell_offset(not_taken_off_set);
+}
+static ByteSize branch_data_size() {
+return cell_offset(branch_cell_count);
+}
+#ifdef CC_INTERP
+static int branch_data_size_in_bytes() {
+return cell_offset_in_bytes(branch_cell_count);
+}
+static void increment_not_taken_count_no_overflow(DataLayout* layout) {
+increment_uint_at_no_overflow(layout, not_taken_off_set);
+}
+static DataLayout* advance_not_taken(DataLayout* layout) {
+return (DataLayout*) (((address)layout) + (ssize_t)BranchData::branch_data_size_in_bytes());
+}
+#endif // CC_INTERP
+// Specific initialization.
+void post_initialize(BytecodeStream* stream, MethodData* mdo);
+#ifndef PRODUCT
+void print_data_on(outputStream* st, const char* extra = NULL) const;
+#endif
+};
+// ArrayData
+//
+// A ArrayData is a base class for accessing profiling data which does
+// not have a statically known size.  It consists of an array length
+// and an array start.
+class ArrayData : public ProfileData {
+protected:
+friend class DataLayout;
+enum {
+array_len_off_set,
+array_start_off_set
+};
+uint array_uint_at(int index) const {
+int aindex = index + array_start_off_set;
+return uint_at(aindex);
+}
+int array_int_at(int index) const {
+int aindex = index + array_start_off_set;
+return int_at(aindex);
+}
+oop array_oop_at(int index) const {
+int aindex = index + array_start_off_set;
+return oop_at(aindex);
+}
+void array_set_int_at(int index, int value) {
+int aindex = index + array_start_off_set;
+set_int_at(aindex, value);
+}
+#ifdef CC_INTERP
+// Static low level accessors for DataLayout with ArrayData's semantics.
+static void increment_array_uint_at_no_overflow(DataLayout* layout, int index) {
+int aindex = index + array_start_off_set;
+increment_uint_at_no_overflow(layout, aindex);
+}
+static int array_int_at(DataLayout* layout, int index) {
+int aindex = index + array_start_off_set;
+return int_at(layout, aindex);
+}
+#endif // CC_INTERP
+// Code generation support for subclasses.
+static ByteSize array_element_offset(int index) {
+return cell_offset(array_start_off_set + index);
+}
+public:
+ArrayData(DataLayout* layout) : ProfileData(layout) {}
+virtual bool is_ArrayData() const { return true; }
+static int static_cell_count() {
+return -1;
+}
+int array_len() const {
+return int_at_unchecked(array_len_off_set);
+}
+virtual int cell_count() const {
+return array_len() + 1;
+}
+// Code generation support
+static ByteSize array_len_offset() {
+return cell_offset(array_len_off_set);
+}
+static ByteSize array_start_offset() {
+return cell_offset(array_start_off_set);
+}
+};
+// MultiBranchData
+//
+// A MultiBranchData is used to access profiling information for
+// a multi-way branch (*switch bytecodes).  It consists of a series
+// of (count, displacement) pairs, which count the number of times each
+// case was taken and specify the data displacment for each branch target.
+class MultiBranchData : public ArrayData {
+protected:
+enum {
+default_count_off_set,
+default_disaplacement_off_set,
+case_array_start
+};
+enum {
+relative_count_off_set,
+relative_displacement_off_set,
+per_case_cell_count
+};
+void set_default_displacement(int displacement) {
+array_set_int_at(default_disaplacement_off_set, displacement);
+}
+void set_displacement_at(int index, int displacement) {
+array_set_int_at(case_array_start +
+index * per_case_cell_count +
+relative_displacement_off_set,
+displacement);
+}
+public:
+MultiBranchData(DataLayout* layout) : ArrayData(layout) {
+assert(layout->tag() == DataLayout::multi_branch_data_tag, "wrong type");
+}
+virtual bool is_MultiBranchData() const { return true; }
+static int compute_cell_count(BytecodeStream* stream);
+int number_of_cases() const {
+int alen = array_len() - 2; // get rid of default case here.
+assert(alen % per_case_cell_count == 0, "must be even");
+return (alen / per_case_cell_count);
+}
+uint default_count() const {
+return array_uint_at(default_count_off_set);
+}
+int default_displacement() const {
+return array_int_at(default_disaplacement_off_set);
+}
+uint count_at(int index) const {
+return array_uint_at(case_array_start +
+index * per_case_cell_count +
+relative_count_off_set);
+}
+int displacement_at(int index) const {
+return array_int_at(case_array_start +
+index * per_case_cell_count +
+relative_displacement_off_set);
+}
+// Code generation support
+static ByteSize default_count_offset() {
+return array_element_offset(default_count_off_set);
+}
+static ByteSize default_displacement_offset() {
+return array_element_offset(default_disaplacement_off_set);
+}
+static ByteSize case_count_offset(int index) {
+return case_array_offset() +
+(per_case_size() * index) +
+relative_count_offset();
+}
+static ByteSize case_array_offset() {
+return array_element_offset(case_array_start);
+}
+static ByteSize per_case_size() {
+return in_ByteSize(per_case_cell_count) * cell_size;
+}
+static ByteSize relative_count_offset() {
+return in_ByteSize(relative_count_off_set) * cell_size;
+}
+static ByteSize relative_displacement_offset() {
+return in_ByteSize(relative_displacement_off_set) * cell_size;
+}
+#ifdef CC_INTERP
+static void increment_count_no_overflow(DataLayout* layout, int index) {
+if (index == -1) {
+increment_array_uint_at_no_overflow(layout, default_count_off_set);
+} else {
+increment_array_uint_at_no_overflow(layout, case_array_start +
+index * per_case_cell_count +
+relative_count_off_set);
+}
+}
+static DataLayout* advance(DataLayout* layout, int index) {
+if (index == -1) {
+return (DataLayout*) (((address)layout) + (ssize_t)array_int_at(layout, default_disaplacement_off_set));
+} else {
+return (DataLayout*) (((address)layout) + (ssize_t)array_int_at(layout, case_array_start +
+index * per_case_cell_count +
+relative_displacement_off_set));
+}
+}
+#endif // CC_INTERP
+// Specific initialization.
+void post_initialize(BytecodeStream* stream, MethodData* mdo);
+#ifndef PRODUCT
+void print_data_on(outputStream* st, const char* extra = NULL) const;
+#endif
+};
+class ArgInfoData : public ArrayData {
+public:
+ArgInfoData(DataLayout* layout) : ArrayData(layout) {
+assert(layout->tag() == DataLayout::arg_info_data_tag, "wrong type");
+}
+virtual bool is_ArgInfoData() const { return true; }
+int number_of_args() const {
+return array_len();
+}
+uint arg_modified(int arg) const {
+return array_uint_at(arg);
+}
+void set_arg_modified(int arg, uint val) {
+array_set_int_at(arg, val);
+}
+#ifndef PRODUCT
+void print_data_on(outputStream* st, const char* extra = NULL) const;
+#endif
+};
+// ParametersTypeData
+//
+// A ParametersTypeData is used to access profiling information about
+// types of parameters to a method
+class ParametersTypeData : public ArrayData {
+private:
+TypeStackSlotEntries _parameters;
+static int stack_slot_local_offset(int i) {
+assert_profiling_enabled();
+return array_start_off_set + TypeStackSlotEntries::stack_slot_local_offset(i);
+}
+static int type_local_offset(int i) {
+assert_profiling_enabled();
+return array_start_off_set + TypeStackSlotEntries::type_local_offset(i);
+}
+static bool profiling_enabled();
+static void assert_profiling_enabled() {
+assert(profiling_enabled(), "method parameters profiling should be on");
+}
+public:
+ParametersTypeData(DataLayout* layout) : ArrayData(layout), _parameters(1, number_of_parameters()) {
+assert(layout->tag() == DataLayout::parameters_type_data_tag, "wrong type");
+// Some compilers (VC++) don't want this passed in member initialization list
+_parameters.set_profile_data(this);
+}
+static int compute_cell_count(Method* m);
+virtual bool is_ParametersTypeData() const { return true; }
+virtual void post_initialize(BytecodeStream* stream, MethodData* mdo);
+int number_of_parameters() const {
+return array_len() / TypeStackSlotEntries::per_arg_count();
+}
+const TypeStackSlotEntries* parameters() const { return &_parameters; }
+uint stack_slot(int i) const {
+return _parameters.stack_slot(i);
+}
+void set_type(int i, Klass* k) {
+intptr_t current = _parameters.type(i);
+_parameters.set_type(i, TypeEntries::with_status((intptr_t)k, current));
+}
+virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) {
+_parameters.clean_weak_klass_links(is_alive_closure);
+}
+#ifndef PRODUCT
+virtual void print_data_on(outputStream* st, const char* extra = NULL) const;
+#endif
+static ByteSize stack_slot_offset(int i) {
+return cell_offset(stack_slot_local_offset(i));
+}
+static ByteSize type_offset(int i) {
+return cell_offset(type_local_offset(i));
+}
+};
+// SpeculativeTrapData
+//
+// A SpeculativeTrapData is used to record traps due to type
+// speculation. It records the root of the compilation: that type
+// speculation is wrong in the context of one compilation (for
+// method1) doesn't mean it's wrong in the context of another one (for
+// method2). Type speculation could have more/different data in the
+// context of the compilation of method2 and it's worthwhile to try an
+// optimization that failed for compilation of method1 in the context
+// of compilation of method2.
+// Space for SpeculativeTrapData entries is allocated from the extra
+// data space in the MDO. If we run out of space, the trap data for
+// the ProfileData at that bci is updated.
+class SpeculativeTrapData : public ProfileData {
+protected:
+enum {
+method_offset,
+speculative_trap_cell_count
+};
+public:
+SpeculativeTrapData(DataLayout* layout) : ProfileData(layout) {
+assert(layout->tag() == DataLayout::speculative_trap_data_tag, "wrong type");
+}
+virtual bool is_SpeculativeTrapData() const { return true; }
+static int static_cell_count() {
+return speculative_trap_cell_count;
+}
+virtual int cell_count() const {
+return static_cell_count();
+}
+// Direct accessor
+Method* method() const {
+return (Method*)intptr_at(method_offset);
+}
+void set_method(Method* m) {
+set_intptr_at(method_offset, (intptr_t)m);
+}
+#ifndef PRODUCT
+virtual void print_data_on(outputStream* st, const char* extra = NULL) const;
+#endif
+};
+// MethodData*
+//
+// A MethodData* holds information which has been collected about
+// a method.  Its layout looks like this:
+//
+// -----------------------------
+// | header                    |
+// | klass                     |
+// -----------------------------
+// | method                    |
+// | size of the MethodData* |
+// -----------------------------
+// | Data entries...           |
+// |   (variable size)         |
+// |                           |
+// .                           .
+// .                           .
+// .                           .
+// |                           |
+// -----------------------------
+//
+// The data entry area is a heterogeneous array of DataLayouts. Each
+// DataLayout in the array corresponds to a specific bytecode in the
+// method.  The entries in the array are sorted by the corresponding
+// bytecode.  Access to the data is via resource-allocated ProfileData,
+// which point to the underlying blocks of DataLayout structures.
+//
+// During interpretation, if profiling in enabled, the interpreter
+// maintains a method data pointer (mdp), which points at the entry
+// in the array corresponding to the current bci.  In the course of
+// intepretation, when a bytecode is encountered that has profile data
+// associated with it, the entry pointed to by mdp is updated, then the
+// mdp is adjusted to point to the next appropriate DataLayout.  If mdp
+// is NULL to begin with, the interpreter assumes that the current method
+// is not (yet) being profiled.
+//
+// In MethodData* parlance, "dp" is a "data pointer", the actual address
+// of a DataLayout element.  A "di" is a "data index", the offset in bytes
+// from the base of the data entry array.  A "displacement" is the byte offset
+// in certain ProfileData objects that indicate the amount the mdp must be
+// adjusted in the event of a change in control flow.
+//
+CC_INTERP_ONLY(class BytecodeInterpreter;)
+class MethodData : public Metadata {
+friend class VMStructs;
+CC_INTERP_ONLY(friend class BytecodeInterpreter;)
+private:
+friend class ProfileData;
+// Back pointer to the Method*
+Method* _method;
+// Size of this oop in bytes
+int _size;
+// Cached hint for bci_to_dp and bci_to_data
+int _hint_di;
+Mutex _extra_data_lock;
+MethodData(methodHandle method, int size, TRAPS);
+public:
+static MethodData* allocate(ClassLoaderData* loader_data, methodHandle method, TRAPS);
+MethodData() : _extra_data_lock(Monitor::leaf, "MDO extra data lock") {}; // For ciMethodData
+bool is_methodData() const volatile { return true; }
+// Whole-method sticky bits and flags
+enum {
+_trap_hist_limit    = 19,   // decoupled from Deoptimization::Reason_LIMIT
+_trap_hist_mask     = max_jubyte,
+_extra_data_count   = 4     // extra DataLayout headers, for trap history
+}; // Public flag values
+private:
+uint _nof_decompiles;             // count of all nmethod removals
+uint _nof_overflow_recompiles;    // recompile count, excluding recomp. bits
+uint _nof_overflow_traps;         // trap count, excluding _trap_hist
+union {
+intptr_t _align;
+u1 _array[_trap_hist_limit];
+} _trap_hist;
+// Support for interprocedural escape analysis, from Thomas Kotzmann.
+intx              _eflags;          // flags on escape information
+intx              _arg_local;       // bit set of non-escaping arguments
+intx              _arg_stack;       // bit set of stack-allocatable arguments
+intx              _arg_returned;    // bit set of returned arguments
+int _creation_mileage;              // method mileage at MDO creation
+// How many invocations has this MDO seen?
+// These counters are used to determine the exact age of MDO.
+// We need those because in tiered a method can be concurrently
+// executed at different levels.
+InvocationCounter _invocation_counter;
+// Same for backedges.
+InvocationCounter _backedge_counter;
+// Counter values at the time profiling started.
+int               _invocation_counter_start;
+int               _backedge_counter_start;
+#if INCLUDE_RTM_OPT
+// State of RTM code generation during compilation of the method
+int               _rtm_state;
+#endif
+// Number of loops and blocks is computed when compiling the first
+// time with C1. It is used to determine if method is trivial.
+short             _num_loops;
+short             _num_blocks;
+// Highest compile level this method has ever seen.
+u1                _highest_comp_level;
+// Same for OSR level
+u1                _highest_osr_comp_level;
+// Does this method contain anything worth profiling?
+bool              _would_profile;
+// Size of _data array in bytes.  (Excludes header and extra_data fields.)
+int _data_size;
+// data index for the area dedicated to parameters. -1 if no
+// parameter profiling.
+int _parameters_type_data_di;
+// Beginning of the data entries
+intptr_t _data[1];
+// Helper for size computation
+static int compute_data_size(BytecodeStream* stream);
+static int bytecode_cell_count(Bytecodes::Code code);
+static bool is_speculative_trap_bytecode(Bytecodes::Code code);
+enum { no_profile_data = -1, variable_cell_count = -2 };
+// Helper for initialization
+DataLayout* data_layout_at(int data_index) const {
+assert(data_index % sizeof(intptr_t) == 0, "unaligned");
+return (DataLayout*) (((address)_data) + data_index);
+}
+// Initialize an individual data segment.  Returns the size of
+// the segment in bytes.
+int initialize_data(BytecodeStream* stream, int data_index);
+// Helper for data_at
+DataLayout* limit_data_position() const {
+return (DataLayout*)((address)data_base() + _data_size);
+}
+bool out_of_bounds(int data_index) const {
+return data_index >= data_size();
+}
+// Give each of the data entries a chance to perform specific
+// data initialization.
+void post_initialize(BytecodeStream* stream);
+// hint accessors
+int      hint_di() const  { return _hint_di; }
+void set_hint_di(int di)  {
+assert(!out_of_bounds(di), "hint_di out of bounds");
+_hint_di = di;
+}
+ProfileData* data_before(int bci) {
+// avoid SEGV on this edge case
+if (data_size() == 0)
+return NULL;
+int hint = hint_di();
+if (data_layout_at(hint)->bci() <= bci)
+return data_at(hint);
+return first_data();
+}
+// What is the index of the first data entry?
+int first_di() const { return 0; }
+ProfileData* bci_to_extra_data_helper(int bci, Method* m, DataLayout*& dp, bool concurrent);
+// Find or create an extra ProfileData:
+ProfileData* bci_to_extra_data(int bci, Method* m, bool create_if_missing);
+// return the argument info cell
+ArgInfoData *arg_info();
+enum {
+no_type_profile = 0,
+type_profile_jsr292 = 1,
+type_profile_all = 2
+};
+static bool profile_jsr292(methodHandle m, int bci);
+static int profile_arguments_flag();
+static bool profile_all_arguments();
+static bool profile_arguments_for_invoke(methodHandle m, int bci);
+static int profile_return_flag();
+static bool profile_all_return();
+static bool profile_return_for_invoke(methodHandle m, int bci);
+static int profile_parameters_flag();
+static bool profile_parameters_jsr292_only();
+static bool profile_all_parameters();
+void clean_extra_data(BoolObjectClosure* is_alive);
+void clean_extra_data_helper(DataLayout* dp, int shift, bool reset = false);
+void verify_extra_data_clean(BoolObjectClosure* is_alive);
+public:
+static int header_size() {
+return sizeof(MethodData)/wordSize;
+}
+// Compute the size of a MethodData* before it is created.
+static int compute_allocation_size_in_bytes(methodHandle method);
+static int compute_allocation_size_in_words(methodHandle method);
+static int compute_extra_data_count(int data_size, int empty_bc_count, bool needs_speculative_traps);
+// Determine if a given bytecode can have profile information.
+static bool bytecode_has_profile(Bytecodes::Code code) {
+return bytecode_cell_count(code) != no_profile_data;
+}
+// reset into original state
+void init();
+// My size
+int size_in_bytes() const { return _size; }
+int size() const    { return align_object_size(align_size_up(_size, BytesPerWord)/BytesPerWord); }
+#if INCLUDE_SERVICES
+void collect_statistics(KlassSizeStats *sz) const;
+#endif
+int      creation_mileage() const  { return _creation_mileage; }
+void set_creation_mileage(int x)   { _creation_mileage = x; }
+int invocation_count() {
+if (invocation_counter()->carry()) {
+return InvocationCounter::count_limit;
+}
+return invocation_counter()->count();
+}
+int backedge_count() {
+if (backedge_counter()->carry()) {
+return InvocationCounter::count_limit;
+}
+return backedge_counter()->count();
+}
+int invocation_count_start() {
+if (invocation_counter()->carry()) {
+return 0;
+}
+return _invocation_counter_start;
+}
+int backedge_count_start() {
+if (backedge_counter()->carry()) {
+return 0;
+}
+return _backedge_counter_start;
+}
+int invocation_count_delta() { return invocation_count() - invocation_count_start(); }
+int backedge_count_delta()   { return backedge_count()   - backedge_count_start();   }
+void reset_start_counters() {
+_invocation_counter_start = invocation_count();
+_backedge_counter_start = backedge_count();
+}
+InvocationCounter* invocation_counter()     { return &_invocation_counter; }
+InvocationCounter* backedge_counter()       { return &_backedge_counter;   }
+#if INCLUDE_RTM_OPT
+int rtm_state() const {
+return _rtm_state;
+}
+void set_rtm_state(RTMState rstate) {
+_rtm_state = (int)rstate;
+}
+void atomic_set_rtm_state(RTMState rstate) {
+Atomic::store((int)rstate, &_rtm_state);
+}
+static int rtm_state_offset_in_bytes() {
+return offset_of(MethodData, _rtm_state);
+}
+#endif
+void set_would_profile(bool p)              { _would_profile = p;    }
+bool would_profile() const                  { return _would_profile; }
+int highest_comp_level() const              { return _highest_comp_level;      }
+void set_highest_comp_level(int level)      { _highest_comp_level = level;     }
+int highest_osr_comp_level() const          { return _highest_osr_comp_level;  }
+void set_highest_osr_comp_level(int level)  { _highest_osr_comp_level = level; }
+int num_loops() const                       { return _num_loops;  }
+void set_num_loops(int n)                   { _num_loops = n;     }
+int num_blocks() const                      { return _num_blocks; }
+void set_num_blocks(int n)                  { _num_blocks = n;    }
+bool is_mature() const;  // consult mileage and ProfileMaturityPercentage
+static int mileage_of(Method* m);
+// Support for interprocedural escape analysis, from Thomas Kotzmann.
+enum EscapeFlag {
+estimated    = 1 << 0,
+return_local = 1 << 1,
+return_allocated = 1 << 2,
+allocated_escapes = 1 << 3,
+unknown_modified = 1 << 4
+};
+intx eflags()                                  { return _eflags; }
+intx arg_local()                               { return _arg_local; }
+intx arg_stack()                               { return _arg_stack; }
+intx arg_returned()                            { return _arg_returned; }
+uint arg_modified(int a)                       { ArgInfoData *aid = arg_info();
+assert(aid != NULL, "arg_info must be not null");
+assert(a >= 0 && a < aid->number_of_args(), "valid argument number");
+return aid->arg_modified(a); }
+void set_eflags(intx v)                        { _eflags = v; }
+void set_arg_local(intx v)                     { _arg_local = v; }
+void set_arg_stack(intx v)                     { _arg_stack = v; }
+void set_arg_returned(intx v)                  { _arg_returned = v; }
+void set_arg_modified(int a, uint v)           { ArgInfoData *aid = arg_info();
+assert(aid != NULL, "arg_info must be not null");
+assert(a >= 0 && a < aid->number_of_args(), "valid argument number");
+aid->set_arg_modified(a, v); }
+void clear_escape_info()                       { _eflags = _arg_local = _arg_stack = _arg_returned = 0; }
+// Location and size of data area
+address data_base() const {
+return (address) _data;
+}
+int data_size() const {
+return _data_size;
+}
+// Accessors
+Method* method() const { return _method; }
+// Get the data at an arbitrary (sort of) data index.
+ProfileData* data_at(int data_index) const;
+// Walk through the data in order.
+ProfileData* first_data() const { return data_at(first_di()); }
+ProfileData* next_data(ProfileData* current) const;
+bool is_valid(ProfileData* current) const { return current != NULL; }
+// Convert a dp (data pointer) to a di (data index).
+int dp_to_di(address dp) const {
+return dp - ((address)_data);
+}
+address di_to_dp(int di) {
+return (address)data_layout_at(di);
+}
+// bci to di/dp conversion.
+address bci_to_dp(int bci);
+int bci_to_di(int bci) {
+return dp_to_di(bci_to_dp(bci));
+}
+// Get the data at an arbitrary bci, or NULL if there is none.
+ProfileData* bci_to_data(int bci);
+// Same, but try to create an extra_data record if one is needed:
+ProfileData* allocate_bci_to_data(int bci, Method* m) {
+ProfileData* data = NULL;
+// If m not NULL, try to allocate a SpeculativeTrapData entry
+if (m == NULL) {
+data = bci_to_data(bci);
+}
+if (data != NULL) {
+return data;
+}
+data = bci_to_extra_data(bci, m, true);
+if (data != NULL) {
+return data;
+}
+// If SpeculativeTrapData allocation fails try to allocate a
+// regular entry
+data = bci_to_data(bci);
+if (data != NULL) {
+return data;
+}
+return bci_to_extra_data(bci, NULL, true);
+}
+// Add a handful of extra data records, for trap tracking.
+DataLayout* extra_data_base() const { return limit_data_position(); }
+DataLayout* extra_data_limit() const { return (DataLayout*)((address)this + size_in_bytes()); }
+int extra_data_size() const { return (address)extra_data_limit()
+- (address)extra_data_base(); }
+static DataLayout* next_extra(DataLayout* dp);
+// Return (uint)-1 for overflow.
+uint trap_count(int reason) const {
+assert((uint)reason < _trap_hist_limit, "oob");
+return (int)((_trap_hist._array[reason]+1) & _trap_hist_mask) - 1;
+}
+// For loops:
+static uint trap_reason_limit() { return _trap_hist_limit; }
+static uint trap_count_limit()  { return _trap_hist_mask; }
+uint inc_trap_count(int reason) {
+// Count another trap, anywhere in this method.
+assert(reason >= 0, "must be single trap");
+if ((uint)reason < _trap_hist_limit) {
+uint cnt1 = 1 + _trap_hist._array[reason];
+if ((cnt1 & _trap_hist_mask) != 0) {  // if no counter overflow...
+_trap_hist._array[reason] = cnt1;
+return cnt1;
+} else {
+return _trap_hist_mask + (++_nof_overflow_traps);
+}
+} else {
+// Could not represent the count in the histogram.
+return (++_nof_overflow_traps);
+}
+}
+uint overflow_trap_count() const {
+return _nof_overflow_traps;
+}
+uint overflow_recompile_count() const {
+return _nof_overflow_recompiles;
+}
+void inc_overflow_recompile_count() {
+_nof_overflow_recompiles += 1;
+}
+uint decompile_count() const {
+return _nof_decompiles;
+}
+void inc_decompile_count() {
+_nof_decompiles += 1;
+if (decompile_count() > (uint)PerMethodRecompilationCutoff) {
+method()->set_not_compilable(CompLevel_full_optimization, true, "decompile_count > PerMethodRecompilationCutoff");
+}
+}
+// Return pointer to area dedicated to parameters in MDO
+ParametersTypeData* parameters_type_data() const {
+return _parameters_type_data_di != -1 ? data_layout_at(_parameters_type_data_di)->data_in()->as_ParametersTypeData() : NULL;
+}
+int parameters_type_data_di() const {
+assert(_parameters_type_data_di != -1, "no args type data");
+return _parameters_type_data_di;
+}
+// Support for code generation
+static ByteSize data_offset() {
+return byte_offset_of(MethodData, _data[0]);
+}
+static ByteSize invocation_counter_offset() {
+return byte_offset_of(MethodData, _invocation_counter);
+}
+static ByteSize backedge_counter_offset() {
+return byte_offset_of(MethodData, _backedge_counter);
+}
+static ByteSize parameters_type_data_di_offset() {
+return byte_offset_of(MethodData, _parameters_type_data_di);
+}
+// Deallocation support - no pointer fields to deallocate
+void deallocate_contents(ClassLoaderData* loader_data) {}
+// GC support
+void set_size(int object_size_in_bytes) { _size = object_size_in_bytes; }
+// Printing
+#ifndef PRODUCT
+void print_on      (outputStream* st) const;
+#endif
+void print_value_on(outputStream* st) const;
+#ifndef PRODUCT
+// printing support for method data
+void print_data_on(outputStream* st) const;
+#endif
+const char* internal_name() const { return "{method data}"; }
+// verification
+void verify_on(outputStream* st);
+void verify_data_on(outputStream* st);
+static bool profile_parameters_for_method(methodHandle m);
+static bool profile_arguments();
+static bool profile_arguments_jsr292_only();
+static bool profile_return();
+static bool profile_parameters();
+static bool profile_return_jsr292_only();
+void clean_method_data(BoolObjectClosure* is_alive);
+};
+#endif // SHARE_VM_OOPS_METHODDATAOOP_HPP

Mercurial > jdk8-mips64-public > hotspot / file comparison

comparison: src/share/vm/oops/methodData.hpp

src/share/vm/oops/methodData.hpp