author | coleenp |
Sat, 01 Sep 2012 13:25:18 -0400 | |
changeset 13728 | 882756847a04 |
parent 7397 | 5b173b4ca846 |
child 14477 | 95e66ea71f71 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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||
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#include "precompiled.hpp" |
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#include "ci/ciMetadata.hpp" |
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#include "ci/ciMethodData.hpp" |
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#include "ci/ciUtilities.hpp" |
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#include "memory/allocation.inline.hpp" |
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#include "memory/resourceArea.hpp" |
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#include "runtime/deoptimization.hpp" |
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#include "utilities/copy.hpp" |
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// ciMethodData |
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// ------------------------------------------------------------------ |
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// ciMethodData::ciMethodData |
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// |
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ciMethodData::ciMethodData(MethodData* md) : ciMetadata(md) { |
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assert(md != NULL, "no null method data"); |
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Copy::zero_to_words((HeapWord*) &_orig, sizeof(_orig) / sizeof(HeapWord)); |
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_data = NULL; |
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_data_size = 0; |
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_extra_data_size = 0; |
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_current_mileage = 0; |
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_invocation_counter = 0; |
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_backedge_counter = 0; |
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_state = empty_state; |
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_saw_free_extra_data = false; |
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// Set an initial hint. Don't use set_hint_di() because |
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// first_di() may be out of bounds if data_size is 0. |
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_hint_di = first_di(); |
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// Initialize the escape information (to "don't know."); |
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_eflags = _arg_local = _arg_stack = _arg_returned = 0; |
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} |
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// ------------------------------------------------------------------ |
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// ciMethodData::ciMethodData |
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// |
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// No MethodData*. |
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ciMethodData::ciMethodData() : ciMetadata(NULL) { |
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Copy::zero_to_words((HeapWord*) &_orig, sizeof(_orig) / sizeof(HeapWord)); |
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_data = NULL; |
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_data_size = 0; |
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_extra_data_size = 0; |
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_current_mileage = 0; |
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_invocation_counter = 0; |
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_backedge_counter = 0; |
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_state = empty_state; |
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_saw_free_extra_data = false; |
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// Set an initial hint. Don't use set_hint_di() because |
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// first_di() may be out of bounds if data_size is 0. |
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_hint_di = first_di(); |
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// Initialize the escape information (to "don't know."); |
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_eflags = _arg_local = _arg_stack = _arg_returned = 0; |
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} |
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void ciMethodData::load_data() { |
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MethodData* mdo = get_MethodData(); |
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if (mdo == NULL) return; |
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// To do: don't copy the data if it is not "ripe" -- require a minimum # |
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// of invocations. |
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// Snapshot the data -- actually, take an approximate snapshot of |
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// the data. Any concurrently executing threads may be changing the |
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// data as we copy it. |
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Copy::disjoint_words((HeapWord*) mdo, |
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(HeapWord*) &_orig, |
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sizeof(_orig) / HeapWordSize); |
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Arena* arena = CURRENT_ENV->arena(); |
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_data_size = mdo->data_size(); |
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_extra_data_size = mdo->extra_data_size(); |
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int total_size = _data_size + _extra_data_size; |
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_data = (intptr_t *) arena->Amalloc(total_size); |
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Copy::disjoint_words((HeapWord*) mdo->data_base(), (HeapWord*) _data, total_size / HeapWordSize); |
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// Traverse the profile data, translating any oops into their |
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// ci equivalents. |
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ResourceMark rm; |
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ciProfileData* ci_data = first_data(); |
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ProfileData* data = mdo->first_data(); |
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while (is_valid(ci_data)) { |
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ci_data->translate_from(data); |
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ci_data = next_data(ci_data); |
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data = mdo->next_data(data); |
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} |
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// Note: Extra data are all BitData, and do not need translation. |
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_current_mileage = MethodData::mileage_of(mdo->method()); |
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_invocation_counter = mdo->invocation_count(); |
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_backedge_counter = mdo->backedge_count(); |
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_state = mdo->is_mature()? mature_state: immature_state; |
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_eflags = mdo->eflags(); |
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_arg_local = mdo->arg_local(); |
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_arg_stack = mdo->arg_stack(); |
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_arg_returned = mdo->arg_returned(); |
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} |
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void ciReceiverTypeData::translate_receiver_data_from(ProfileData* data) { |
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for (uint row = 0; row < row_limit(); row++) { |
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Klass* k = data->as_ReceiverTypeData()->receiver(row); |
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if (k != NULL) { |
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ciKlass* klass = CURRENT_ENV->get_klass(k); |
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set_receiver(row, klass); |
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} |
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} |
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} |
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// Get the data at an arbitrary (sort of) data index. |
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ciProfileData* ciMethodData::data_at(int data_index) { |
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if (out_of_bounds(data_index)) { |
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return NULL; |
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} |
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DataLayout* data_layout = data_layout_at(data_index); |
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switch (data_layout->tag()) { |
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case DataLayout::no_tag: |
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default: |
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ShouldNotReachHere(); |
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return NULL; |
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case DataLayout::bit_data_tag: |
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return new ciBitData(data_layout); |
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case DataLayout::counter_data_tag: |
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return new ciCounterData(data_layout); |
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case DataLayout::jump_data_tag: |
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return new ciJumpData(data_layout); |
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case DataLayout::receiver_type_data_tag: |
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return new ciReceiverTypeData(data_layout); |
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case DataLayout::virtual_call_data_tag: |
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return new ciVirtualCallData(data_layout); |
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case DataLayout::ret_data_tag: |
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return new ciRetData(data_layout); |
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case DataLayout::branch_data_tag: |
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return new ciBranchData(data_layout); |
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case DataLayout::multi_branch_data_tag: |
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return new ciMultiBranchData(data_layout); |
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case DataLayout::arg_info_data_tag: |
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return new ciArgInfoData(data_layout); |
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}; |
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} |
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// Iteration over data. |
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ciProfileData* ciMethodData::next_data(ciProfileData* current) { |
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int current_index = dp_to_di(current->dp()); |
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int next_index = current_index + current->size_in_bytes(); |
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ciProfileData* next = data_at(next_index); |
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return next; |
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} |
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// Translate a bci to its corresponding data, or NULL. |
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ciProfileData* ciMethodData::bci_to_data(int bci) { |
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ciProfileData* data = data_before(bci); |
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for ( ; is_valid(data); data = next_data(data)) { |
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if (data->bci() == bci) { |
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set_hint_di(dp_to_di(data->dp())); |
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return data; |
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} else if (data->bci() > bci) { |
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break; |
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} |
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} |
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// bci_to_extra_data(bci) ... |
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DataLayout* dp = data_layout_at(data_size()); |
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DataLayout* end = data_layout_at(data_size() + extra_data_size()); |
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for (; dp < end; dp = MethodData::next_extra(dp)) { |
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if (dp->tag() == DataLayout::no_tag) { |
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_saw_free_extra_data = true; // observed an empty slot (common case) |
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return NULL; |
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} |
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if (dp->tag() == DataLayout::arg_info_data_tag) { |
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break; // ArgInfoData is at the end of extra data section. |
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} |
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if (dp->bci() == bci) { |
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assert(dp->tag() == DataLayout::bit_data_tag, "sane"); |
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return new ciBitData(dp); |
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} |
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} |
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return NULL; |
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} |
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// Conservatively decode the trap_state of a ciProfileData. |
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int ciMethodData::has_trap_at(ciProfileData* data, int reason) { |
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typedef Deoptimization::DeoptReason DR_t; |
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int per_bc_reason |
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= Deoptimization::reason_recorded_per_bytecode_if_any((DR_t) reason); |
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if (trap_count(reason) == 0) { |
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// Impossible for this trap to have occurred, regardless of trap_state. |
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// Note: This happens if the MDO is empty. |
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return 0; |
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} else if (per_bc_reason == Deoptimization::Reason_none) { |
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// We cannot conclude anything; a trap happened somewhere, maybe here. |
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return -1; |
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} else if (data == NULL) { |
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// No profile here, not even an extra_data record allocated on the fly. |
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// If there are empty extra_data records, and there had been a trap, |
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// there would have been a non-null data pointer. If there are no |
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// free extra_data records, we must return a conservative -1. |
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if (_saw_free_extra_data) |
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return 0; // Q.E.D. |
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else |
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return -1; // bail with a conservative answer |
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} else { |
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return Deoptimization::trap_state_has_reason(data->trap_state(), per_bc_reason); |
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} |
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} |
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int ciMethodData::trap_recompiled_at(ciProfileData* data) { |
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if (data == NULL) { |
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return (_saw_free_extra_data? 0: -1); // (see previous method) |
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} else { |
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return Deoptimization::trap_state_is_recompiled(data->trap_state())? 1: 0; |
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} |
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} |
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void ciMethodData::clear_escape_info() { |
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VM_ENTRY_MARK; |
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MethodData* mdo = get_MethodData(); |
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if (mdo != NULL) { |
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mdo->clear_escape_info(); |
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ArgInfoData *aid = arg_info(); |
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int arg_count = (aid == NULL) ? 0 : aid->number_of_args(); |
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for (int i = 0; i < arg_count; i++) { |
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set_arg_modified(i, 0); |
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} |
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} |
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_eflags = _arg_local = _arg_stack = _arg_returned = 0; |
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} |
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// copy our escape info to the MethodData* if it exists |
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void ciMethodData::update_escape_info() { |
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VM_ENTRY_MARK; |
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MethodData* mdo = get_MethodData(); |
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if ( mdo != NULL) { |
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mdo->set_eflags(_eflags); |
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mdo->set_arg_local(_arg_local); |
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mdo->set_arg_stack(_arg_stack); |
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mdo->set_arg_returned(_arg_returned); |
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int arg_count = mdo->method()->size_of_parameters(); |
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for (int i = 0; i < arg_count; i++) { |
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mdo->set_arg_modified(i, arg_modified(i)); |
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} |
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} |
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} |
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void ciMethodData::set_compilation_stats(short loops, short blocks) { |
267 |
VM_ENTRY_MARK; |
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MethodData* mdo = get_MethodData(); |
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if (mdo != NULL) { |
270 |
mdo->set_num_loops(loops); |
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mdo->set_num_blocks(blocks); |
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} |
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} |
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void ciMethodData::set_would_profile(bool p) { |
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VM_ENTRY_MARK; |
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MethodData* mdo = get_MethodData(); |
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if (mdo != NULL) { |
279 |
mdo->set_would_profile(p); |
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} |
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281 |
} |
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bool ciMethodData::has_escape_info() { |
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return eflag_set(MethodData::estimated); |
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} |
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void ciMethodData::set_eflag(MethodData::EscapeFlag f) { |
1 | 288 |
set_bits(_eflags, f); |
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} |
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void ciMethodData::clear_eflag(MethodData::EscapeFlag f) { |
1 | 292 |
clear_bits(_eflags, f); |
293 |
} |
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bool ciMethodData::eflag_set(MethodData::EscapeFlag f) const { |
1 | 296 |
return mask_bits(_eflags, f) != 0; |
297 |
} |
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void ciMethodData::set_arg_local(int i) { |
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300 |
set_nth_bit(_arg_local, i); |
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301 |
} |
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void ciMethodData::set_arg_stack(int i) { |
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304 |
set_nth_bit(_arg_stack, i); |
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305 |
} |
|
306 |
||
307 |
void ciMethodData::set_arg_returned(int i) { |
|
308 |
set_nth_bit(_arg_returned, i); |
|
309 |
} |
|
310 |
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void ciMethodData::set_arg_modified(int arg, uint val) { |
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ArgInfoData *aid = arg_info(); |
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if (aid == NULL) |
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return; |
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assert(arg >= 0 && arg < aid->number_of_args(), "valid argument number"); |
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aid->set_arg_modified(arg, val); |
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} |
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318 |
|
1 | 319 |
bool ciMethodData::is_arg_local(int i) const { |
320 |
return is_set_nth_bit(_arg_local, i); |
|
321 |
} |
|
322 |
||
323 |
bool ciMethodData::is_arg_stack(int i) const { |
|
324 |
return is_set_nth_bit(_arg_stack, i); |
|
325 |
} |
|
326 |
||
327 |
bool ciMethodData::is_arg_returned(int i) const { |
|
328 |
return is_set_nth_bit(_arg_returned, i); |
|
329 |
} |
|
330 |
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uint ciMethodData::arg_modified(int arg) const { |
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ArgInfoData *aid = arg_info(); |
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if (aid == NULL) |
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return 0; |
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assert(arg >= 0 && arg < aid->number_of_args(), "valid argument number"); |
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return aid->arg_modified(arg); |
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337 |
} |
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338 |
|
1 | 339 |
ByteSize ciMethodData::offset_of_slot(ciProfileData* data, ByteSize slot_offset_in_data) { |
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// Get offset within MethodData* of the data array |
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ByteSize data_offset = MethodData::data_offset(); |
1 | 342 |
|
343 |
// Get cell offset of the ProfileData within data array |
|
344 |
int cell_offset = dp_to_di(data->dp()); |
|
345 |
||
346 |
// Add in counter_offset, the # of bytes into the ProfileData of counter or flag |
|
347 |
int offset = in_bytes(data_offset) + cell_offset + in_bytes(slot_offset_in_data); |
|
348 |
||
349 |
return in_ByteSize(offset); |
|
350 |
} |
|
351 |
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ciArgInfoData *ciMethodData::arg_info() const { |
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// Should be last, have to skip all traps. |
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354 |
DataLayout* dp = data_layout_at(data_size()); |
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DataLayout* end = data_layout_at(data_size() + extra_data_size()); |
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for (; dp < end; dp = MethodData::next_extra(dp)) { |
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if (dp->tag() == DataLayout::arg_info_data_tag) |
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return new ciArgInfoData(dp); |
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359 |
} |
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360 |
return NULL; |
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|
361 |
} |
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|
362 |
|
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363 |
|
1 | 364 |
// Implementation of the print method. |
365 |
void ciMethodData::print_impl(outputStream* st) { |
|
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366 |
ciMetadata::print_impl(st); |
1 | 367 |
} |
368 |
||
369 |
#ifndef PRODUCT |
|
370 |
void ciMethodData::print() { |
|
371 |
print_data_on(tty); |
|
372 |
} |
|
373 |
||
374 |
void ciMethodData::print_data_on(outputStream* st) { |
|
375 |
ResourceMark rm; |
|
376 |
ciProfileData* data; |
|
377 |
for (data = first_data(); is_valid(data); data = next_data(data)) { |
|
378 |
st->print("%d", dp_to_di(data->dp())); |
|
379 |
st->fill_to(6); |
|
380 |
data->print_data_on(st); |
|
381 |
} |
|
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382 |
st->print_cr("--- Extra data:"); |
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383 |
DataLayout* dp = data_layout_at(data_size()); |
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384 |
DataLayout* end = data_layout_at(data_size() + extra_data_size()); |
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385 |
for (; dp < end; dp = MethodData::next_extra(dp)) { |
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386 |
if (dp->tag() == DataLayout::no_tag) continue; |
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387 |
if (dp->tag() == DataLayout::bit_data_tag) { |
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388 |
data = new BitData(dp); |
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|
389 |
} else { |
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|
390 |
assert(dp->tag() == DataLayout::arg_info_data_tag, "must be BitData or ArgInfo"); |
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391 |
data = new ciArgInfoData(dp); |
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|
392 |
dp = end; // ArgInfoData is at the end of extra data section. |
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|
393 |
} |
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|
394 |
st->print("%d", dp_to_di(data->dp())); |
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|
395 |
st->fill_to(6); |
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|
396 |
data->print_data_on(st); |
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|
397 |
} |
1 | 398 |
} |
399 |
||
400 |
void ciReceiverTypeData::print_receiver_data_on(outputStream* st) { |
|
401 |
uint row; |
|
402 |
int entries = 0; |
|
403 |
for (row = 0; row < row_limit(); row++) { |
|
404 |
if (receiver(row) != NULL) entries++; |
|
405 |
} |
|
406 |
st->print_cr("count(%u) entries(%u)", count(), entries); |
|
407 |
for (row = 0; row < row_limit(); row++) { |
|
408 |
if (receiver(row) != NULL) { |
|
409 |
tab(st); |
|
410 |
receiver(row)->print_name_on(st); |
|
411 |
st->print_cr("(%u)", receiver_count(row)); |
|
412 |
} |
|
413 |
} |
|
414 |
} |
|
415 |
||
416 |
void ciReceiverTypeData::print_data_on(outputStream* st) { |
|
417 |
print_shared(st, "ciReceiverTypeData"); |
|
418 |
print_receiver_data_on(st); |
|
419 |
} |
|
420 |
||
421 |
void ciVirtualCallData::print_data_on(outputStream* st) { |
|
422 |
print_shared(st, "ciVirtualCallData"); |
|
423 |
rtd_super()->print_receiver_data_on(st); |
|
424 |
} |
|
425 |
#endif |