src/hotspot/share/ci/ciMethodData.hpp
changeset 47216 71c04702a3d5
parent 46542 73dd19b96b5d
child 47887 e20d8f168bb6
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/ci/ciMethodData.hpp	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,606 @@
+/*
+ * Copyright (c) 2001, 2015, 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_CI_CIMETHODDATA_HPP
+#define SHARE_VM_CI_CIMETHODDATA_HPP
+
+#include "ci/ciClassList.hpp"
+#include "ci/ciKlass.hpp"
+#include "ci/ciObject.hpp"
+#include "ci/ciUtilities.hpp"
+#include "oops/methodData.hpp"
+#include "oops/oop.hpp"
+#include "runtime/deoptimization.hpp"
+
+class ciBitData;
+class ciCounterData;
+class ciJumpData;
+class ciReceiverTypeData;
+class ciRetData;
+class ciBranchData;
+class ciArrayData;
+class ciMultiBranchData;
+class ciArgInfoData;
+class ciCallTypeData;
+class ciVirtualCallTypeData;
+class ciParametersTypeData;
+class ciSpeculativeTrapData;
+
+typedef ProfileData ciProfileData;
+
+class ciBitData : public BitData {
+public:
+  ciBitData(DataLayout* layout) : BitData(layout) {};
+};
+
+class ciCounterData : public CounterData {
+public:
+  ciCounterData(DataLayout* layout) : CounterData(layout) {};
+};
+
+class ciJumpData : public JumpData {
+public:
+  ciJumpData(DataLayout* layout) : JumpData(layout) {};
+};
+
+class ciTypeEntries {
+protected:
+  static intptr_t translate_klass(intptr_t k) {
+    Klass* v = TypeEntries::valid_klass(k);
+    if (v != NULL) {
+      ciKlass* klass = CURRENT_ENV->get_klass(v);
+      CURRENT_ENV->ensure_metadata_alive(klass);
+      return with_status(klass, k);
+    }
+    return with_status(NULL, k);
+  }
+
+public:
+  static ciKlass* valid_ciklass(intptr_t k) {
+    if (!TypeEntries::is_type_none(k) &&
+        !TypeEntries::is_type_unknown(k)) {
+      ciKlass* res = (ciKlass*)TypeEntries::klass_part(k);
+      assert(res != NULL, "invalid");
+      return res;
+    } else {
+      return NULL;
+    }
+  }
+
+  static ProfilePtrKind ptr_kind(intptr_t v) {
+    bool maybe_null = TypeEntries::was_null_seen(v);
+    if (!maybe_null) {
+      return ProfileNeverNull;
+    } else if (TypeEntries::is_type_none(v)) {
+      return ProfileAlwaysNull;
+    } else {
+      return ProfileMaybeNull;
+    }
+  }
+
+  static intptr_t with_status(ciKlass* k, intptr_t in) {
+    return TypeEntries::with_status((intptr_t)k, in);
+  }
+
+#ifndef PRODUCT
+  static void print_ciklass(outputStream* st, intptr_t k);
+#endif
+};
+
+class ciTypeStackSlotEntries : public TypeStackSlotEntries, ciTypeEntries {
+public:
+  void translate_type_data_from(const TypeStackSlotEntries* args);
+
+  ciKlass* valid_type(int i) const {
+    return valid_ciklass(type(i));
+  }
+
+  ProfilePtrKind ptr_kind(int i) const {
+    return ciTypeEntries::ptr_kind(type(i));
+  }
+
+#ifndef PRODUCT
+  void print_data_on(outputStream* st) const;
+#endif
+};
+
+class ciReturnTypeEntry : public ReturnTypeEntry, ciTypeEntries {
+public:
+  void translate_type_data_from(const ReturnTypeEntry* ret);
+
+  ciKlass* valid_type() const {
+    return valid_ciklass(type());
+  }
+
+  ProfilePtrKind ptr_kind() const {
+    return ciTypeEntries::ptr_kind(type());
+  }
+
+#ifndef PRODUCT
+  void print_data_on(outputStream* st) const;
+#endif
+};
+
+class ciCallTypeData : public CallTypeData {
+public:
+  ciCallTypeData(DataLayout* layout) : CallTypeData(layout) {}
+
+  ciTypeStackSlotEntries* args() const { return (ciTypeStackSlotEntries*)CallTypeData::args(); }
+  ciReturnTypeEntry* ret() const { return (ciReturnTypeEntry*)CallTypeData::ret(); }
+
+  void translate_from(const ProfileData* data) {
+    if (has_arguments()) {
+      args()->translate_type_data_from(data->as_CallTypeData()->args());
+    }
+    if (has_return()) {
+      ret()->translate_type_data_from(data->as_CallTypeData()->ret());
+    }
+  }
+
+  intptr_t argument_type(int i) const {
+    assert(has_arguments(), "no arg type profiling data");
+    return args()->type(i);
+  }
+
+  ciKlass* valid_argument_type(int i) const {
+    assert(has_arguments(), "no arg type profiling data");
+    return args()->valid_type(i);
+  }
+
+  intptr_t return_type() const {
+    assert(has_return(), "no ret type profiling data");
+    return ret()->type();
+  }
+
+  ciKlass* valid_return_type() const {
+    assert(has_return(), "no ret type profiling data");
+    return ret()->valid_type();
+  }
+
+  ProfilePtrKind argument_ptr_kind(int i) const {
+    return args()->ptr_kind(i);
+  }
+
+  ProfilePtrKind return_ptr_kind() const {
+    return ret()->ptr_kind();
+  }
+
+#ifndef PRODUCT
+  void print_data_on(outputStream* st, const char* extra = NULL) const;
+#endif
+};
+
+class ciReceiverTypeData : public ReceiverTypeData {
+public:
+  ciReceiverTypeData(DataLayout* layout) : ReceiverTypeData(layout) {};
+
+  void set_receiver(uint row, ciKlass* recv) {
+    assert((uint)row < row_limit(), "oob");
+    set_intptr_at(receiver0_offset + row * receiver_type_row_cell_count,
+                  (intptr_t) recv);
+  }
+
+  ciKlass* receiver(uint row) const {
+    assert((uint)row < row_limit(), "oob");
+    ciKlass* recv = (ciKlass*)intptr_at(receiver0_offset + row * receiver_type_row_cell_count);
+    assert(recv == NULL || recv->is_klass(), "wrong type");
+    return recv;
+  }
+
+  // Copy & translate from oop based ReceiverTypeData
+  virtual void translate_from(const ProfileData* data) {
+    translate_receiver_data_from(data);
+  }
+  void translate_receiver_data_from(const ProfileData* data);
+#ifndef PRODUCT
+  void print_data_on(outputStream* st, const char* extra = NULL) const;
+  void print_receiver_data_on(outputStream* st) const;
+#endif
+};
+
+class ciVirtualCallData : public VirtualCallData {
+  // Fake multiple inheritance...  It's a ciReceiverTypeData also.
+  ciReceiverTypeData* rtd_super() const { return (ciReceiverTypeData*) this; }
+
+public:
+  ciVirtualCallData(DataLayout* layout) : VirtualCallData(layout) {};
+
+  void set_receiver(uint row, ciKlass* recv) {
+    rtd_super()->set_receiver(row, recv);
+  }
+
+  ciKlass* receiver(uint row) {
+    return rtd_super()->receiver(row);
+  }
+
+  // Copy & translate from oop based VirtualCallData
+  virtual void translate_from(const ProfileData* data) {
+    rtd_super()->translate_receiver_data_from(data);
+  }
+#ifndef PRODUCT
+  void print_data_on(outputStream* st, const char* extra = NULL) const;
+#endif
+};
+
+class ciVirtualCallTypeData : public VirtualCallTypeData {
+private:
+  // Fake multiple inheritance...  It's a ciReceiverTypeData also.
+  ciReceiverTypeData* rtd_super() const { return (ciReceiverTypeData*) this; }
+public:
+  ciVirtualCallTypeData(DataLayout* layout) : VirtualCallTypeData(layout) {}
+
+  void set_receiver(uint row, ciKlass* recv) {
+    rtd_super()->set_receiver(row, recv);
+  }
+
+  ciKlass* receiver(uint row) const {
+    return rtd_super()->receiver(row);
+  }
+
+  ciTypeStackSlotEntries* args() const { return (ciTypeStackSlotEntries*)VirtualCallTypeData::args(); }
+  ciReturnTypeEntry* ret() const { return (ciReturnTypeEntry*)VirtualCallTypeData::ret(); }
+
+  // Copy & translate from oop based VirtualCallData
+  virtual void translate_from(const ProfileData* data) {
+    rtd_super()->translate_receiver_data_from(data);
+    if (has_arguments()) {
+      args()->translate_type_data_from(data->as_VirtualCallTypeData()->args());
+    }
+    if (has_return()) {
+      ret()->translate_type_data_from(data->as_VirtualCallTypeData()->ret());
+    }
+  }
+
+  intptr_t argument_type(int i) const {
+    assert(has_arguments(), "no arg type profiling data");
+    return args()->type(i);
+  }
+
+  ciKlass* valid_argument_type(int i) const {
+    assert(has_arguments(), "no arg type profiling data");
+    return args()->valid_type(i);
+  }
+
+  intptr_t return_type() const {
+    assert(has_return(), "no ret type profiling data");
+    return ret()->type();
+  }
+
+  ciKlass* valid_return_type() const {
+    assert(has_return(), "no ret type profiling data");
+    return ret()->valid_type();
+  }
+
+  ProfilePtrKind argument_ptr_kind(int i) const {
+    return args()->ptr_kind(i);
+  }
+
+  ProfilePtrKind return_ptr_kind() const {
+    return ret()->ptr_kind();
+  }
+
+#ifndef PRODUCT
+  void print_data_on(outputStream* st, const char* extra = NULL) const;
+#endif
+};
+
+
+class ciRetData : public RetData {
+public:
+  ciRetData(DataLayout* layout) : RetData(layout) {};
+};
+
+class ciBranchData : public BranchData {
+public:
+  ciBranchData(DataLayout* layout) : BranchData(layout) {};
+};
+
+class ciArrayData : public ArrayData {
+public:
+  ciArrayData(DataLayout* layout) : ArrayData(layout) {};
+};
+
+class ciMultiBranchData : public MultiBranchData {
+public:
+  ciMultiBranchData(DataLayout* layout) : MultiBranchData(layout) {};
+};
+
+class ciArgInfoData : public ArgInfoData {
+public:
+  ciArgInfoData(DataLayout* layout) : ArgInfoData(layout) {};
+};
+
+class ciParametersTypeData : public ParametersTypeData {
+public:
+  ciParametersTypeData(DataLayout* layout) : ParametersTypeData(layout) {}
+
+  virtual void translate_from(const ProfileData* data) {
+    parameters()->translate_type_data_from(data->as_ParametersTypeData()->parameters());
+  }
+
+  ciTypeStackSlotEntries* parameters() const { return (ciTypeStackSlotEntries*)ParametersTypeData::parameters(); }
+
+  ciKlass* valid_parameter_type(int i) const {
+    return parameters()->valid_type(i);
+  }
+
+  ProfilePtrKind parameter_ptr_kind(int i) const {
+    return parameters()->ptr_kind(i);
+  }
+
+#ifndef PRODUCT
+  void print_data_on(outputStream* st, const char* extra = NULL) const;
+#endif
+};
+
+class ciSpeculativeTrapData : public SpeculativeTrapData {
+public:
+  ciSpeculativeTrapData(DataLayout* layout) : SpeculativeTrapData(layout) {}
+
+  virtual void translate_from(const ProfileData* data);
+
+  ciMethod* method() const {
+    return (ciMethod*)intptr_at(speculative_trap_method);
+  }
+
+  void set_method(ciMethod* m) {
+    set_intptr_at(speculative_trap_method, (intptr_t)m);
+  }
+
+#ifndef PRODUCT
+  void print_data_on(outputStream* st, const char* extra = NULL) const;
+#endif
+};
+
+// ciMethodData
+//
+// This class represents a MethodData* in the HotSpot virtual
+// machine.
+
+class ciMethodData : public ciMetadata {
+  CI_PACKAGE_ACCESS
+  friend class ciReplay;
+
+private:
+  // Size in bytes
+  int _data_size;
+  int _extra_data_size;
+
+  // Data entries
+  intptr_t* _data;
+
+  // Cached hint for data_before()
+  int _hint_di;
+
+  // Is data attached?  And is it mature?
+  enum { empty_state, immature_state, mature_state };
+  u_char _state;
+
+  // Set this true if empty extra_data slots are ever witnessed.
+  u_char _saw_free_extra_data;
+
+  // Support for interprocedural escape analysis
+  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
+
+  // Maturity of the oop when the snapshot is taken.
+  int _current_mileage;
+
+  // These counters hold the age of MDO in tiered. In tiered we can have the same method
+  // running at different compilation levels concurrently. So, in order to precisely measure
+  // its maturity we need separate counters.
+  int _invocation_counter;
+  int _backedge_counter;
+
+  // Coherent snapshot of original header.
+  MethodData _orig;
+
+  // Area dedicated to parameters. NULL if no parameter profiling for
+  // this method.
+  DataLayout* _parameters;
+  int parameters_size() const {
+    return _parameters == NULL ? 0 : parameters_type_data()->size_in_bytes();
+  }
+
+  ciMethodData(MethodData* md);
+  ciMethodData();
+
+  // Accessors
+  int data_size() const { return _data_size; }
+  int extra_data_size() const { return _extra_data_size; }
+  intptr_t * data() const { return _data; }
+
+  MethodData* get_MethodData() const {
+    return (MethodData*)_metadata;
+  }
+
+  const char* type_string()                      { return "ciMethodData"; }
+
+  void print_impl(outputStream* st);
+
+  DataLayout* data_layout_at(int data_index) const {
+    assert(data_index % sizeof(intptr_t) == 0, "unaligned");
+    return (DataLayout*) (((address)_data) + data_index);
+  }
+
+  bool out_of_bounds(int data_index) {
+    return data_index >= data_size();
+  }
+
+  // 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;
+  }
+  ciProfileData* 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() { return 0; }
+
+  ciArgInfoData *arg_info() const;
+
+  address data_base() const {
+    return (address) _data;
+  }
+
+  void load_extra_data();
+  ciProfileData* bci_to_extra_data(int bci, ciMethod* m, bool& two_free_slots);
+
+  void dump_replay_data_type_helper(outputStream* out, int round, int& count, ProfileData* pdata, ByteSize offset, ciKlass* k);
+  template<class T> void dump_replay_data_call_type_helper(outputStream* out, int round, int& count, T* call_type_data);
+  template<class T> void dump_replay_data_receiver_type_helper(outputStream* out, int round, int& count, T* call_type_data);
+  void dump_replay_data_extra_data_helper(outputStream* out, int round, int& count);
+
+public:
+  bool is_method_data() const { return true; }
+
+  bool is_empty()  { return _state == empty_state; }
+  bool is_mature() { return _state == mature_state; }
+
+  int creation_mileage() { return _orig.creation_mileage(); }
+  int current_mileage()  { return _current_mileage; }
+
+  int invocation_count() { return _invocation_counter; }
+  int backedge_count()   { return _backedge_counter;   }
+
+#if INCLUDE_RTM_OPT
+  // return cached value
+  int rtm_state() {
+    if (is_empty()) {
+      return NoRTM;
+    } else {
+      return get_MethodData()->rtm_state();
+    }
+  }
+#endif
+
+  // Transfer information about the method to MethodData*.
+  // would_profile means we would like to profile this method,
+  // meaning it's not trivial.
+  void set_would_profile(bool p);
+  // Also set the numer of loops and blocks in the method.
+  // Again, this is used to determine if a method is trivial.
+  void set_compilation_stats(short loops, short blocks);
+  // If the compiler finds a profiled type that is known statically
+  // for sure, set it in the MethodData
+  void set_argument_type(int bci, int i, ciKlass* k);
+  void set_parameter_type(int i, ciKlass* k);
+  void set_return_type(int bci, ciKlass* k);
+
+  void load_data();
+
+  // Convert a dp (data pointer) to a di (data index).
+  int dp_to_di(address dp) {
+    return dp - ((address)_data);
+  }
+
+  // Get the data at an arbitrary (sort of) data index.
+  ciProfileData* data_at(int data_index);
+
+  // Walk through the data in order.
+  ciProfileData* first_data() { return data_at(first_di()); }
+  ciProfileData* next_data(ciProfileData* current);
+  bool is_valid(ciProfileData* current) { return current != NULL; }
+
+  DataLayout* extra_data_base() const  { return data_layout_at(data_size()); }
+  DataLayout* args_data_limit() const  { return data_layout_at(data_size() + extra_data_size() -
+                                                               parameters_size()); }
+
+  // Get the data at an arbitrary bci, or NULL if there is none. If m
+  // is not NULL look for a SpeculativeTrapData if any first.
+  ciProfileData* bci_to_data(int bci, ciMethod* m = NULL);
+
+  uint overflow_trap_count() const {
+    return _orig.overflow_trap_count();
+  }
+  uint overflow_recompile_count() const {
+    return _orig.overflow_recompile_count();
+  }
+  uint decompile_count() const {
+    return _orig.decompile_count();
+  }
+  uint trap_count(int reason) const {
+    return _orig.trap_count(reason);
+  }
+  uint trap_reason_limit() const { return _orig.trap_reason_limit(); }
+  uint trap_count_limit()  const { return _orig.trap_count_limit(); }
+
+  // Helpful query functions that decode trap_state.
+  int has_trap_at(ciProfileData* data, int reason);
+  int has_trap_at(int bci, ciMethod* m, int reason) {
+    assert((m != NULL) == Deoptimization::reason_is_speculate(reason), "inconsistent method/reason");
+    return has_trap_at(bci_to_data(bci, m), reason);
+  }
+  int trap_recompiled_at(ciProfileData* data);
+  int trap_recompiled_at(int bci, ciMethod* m) {
+    return trap_recompiled_at(bci_to_data(bci, m));
+  }
+
+  void clear_escape_info();
+  bool has_escape_info();
+  void update_escape_info();
+
+  void set_eflag(MethodData::EscapeFlag f);
+  void clear_eflag(MethodData::EscapeFlag f);
+  bool eflag_set(MethodData::EscapeFlag f) const;
+
+  void set_arg_local(int i);
+  void set_arg_stack(int i);
+  void set_arg_returned(int i);
+  void set_arg_modified(int arg, uint val);
+
+  bool is_arg_local(int i) const;
+  bool is_arg_stack(int i) const;
+  bool is_arg_returned(int i) const;
+  uint arg_modified(int arg) const;
+
+  ciParametersTypeData* parameters_type_data() const {
+    return _parameters != NULL ? new ciParametersTypeData(_parameters) : NULL;
+  }
+
+  // Code generation helper
+  ByteSize offset_of_slot(ciProfileData* data, ByteSize slot_offset_in_data);
+  int      byte_offset_of_slot(ciProfileData* data, ByteSize slot_offset_in_data) { return in_bytes(offset_of_slot(data, slot_offset_in_data)); }
+
+#ifndef PRODUCT
+  // printing support for method data
+  void print();
+  void print_data_on(outputStream* st);
+#endif
+  void dump_replay_data(outputStream* out);
+};
+
+#endif // SHARE_VM_CI_CIMETHODDATA_HPP