| File: | jdk/src/hotspot/share/jfr/recorder/checkpoint/jfrMetadataEvent.cpp |
| Warning: | line 63, column 31 Value stored to 'byte_arr_klass' during its initialization is never read |
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| 1 | /* |
| 2 | * Copyright (c) 2016, 2021, Oracle and/or its affiliates. All rights reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| 13 | * accompanied this code). |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License version |
| 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 18 | * |
| 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| 20 | * or visit www.oracle.com if you need additional information or have any |
| 21 | * questions. |
| 22 | * |
| 23 | */ |
| 24 | |
| 25 | #include "precompiled.hpp" |
| 26 | #include "jfr/jni/jfrJavaSupport.hpp" |
| 27 | #include "jfr/jni/jfrUpcalls.hpp" |
| 28 | #include "jfr/recorder/checkpoint/jfrMetadataEvent.hpp" |
| 29 | #include "jfr/recorder/repository/jfrChunkWriter.hpp" |
| 30 | #include "jfr/recorder/jfrEventSetting.inline.hpp" |
| 31 | #include "oops/klass.inline.hpp" |
| 32 | #include "oops/oop.inline.hpp" |
| 33 | #include "oops/typeArrayOop.inline.hpp" |
| 34 | #include "runtime/interfaceSupport.inline.hpp" |
| 35 | #include "runtime/thread.inline.hpp" |
| 36 | #include "utilities/exceptions.hpp" |
| 37 | |
| 38 | static jbyteArray metadata_blob = NULL__null; |
| 39 | static u8 metadata_id = 0; |
| 40 | static u8 last_metadata_id = 0; |
| 41 | |
| 42 | static void check_internal_types() { |
| 43 | static bool visible = false; |
| 44 | if (!visible && JfrEventSetting::is_internal_types_visible()) { |
| 45 | JavaThread* const jt = JavaThread::current(); |
| 46 | DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_native(jt))JfrJavaSupport::check_java_thread_in_native(jt); |
| 47 | // can safepoint here |
| 48 | ThreadInVMfromNative transition(jt); |
| 49 | visible = JfrUpcalls::unhide_internal_types(jt); |
| 50 | } |
| 51 | } |
| 52 | |
| 53 | static void write_metadata_blob(JfrChunkWriter& chunkwriter, JavaThread* thread) { |
| 54 | assert(chunkwriter.is_valid(), "invariant")do { if (!(chunkwriter.is_valid())) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/jfr/recorder/checkpoint/jfrMetadataEvent.cpp" , 54, "assert(" "chunkwriter.is_valid()" ") failed", "invariant" ); ::breakpoint(); } } while (0); |
| 55 | assert(thread != NULL, "invariant")do { if (!(thread != __null)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/jfr/recorder/checkpoint/jfrMetadataEvent.cpp" , 55, "assert(" "thread != __null" ") failed", "invariant"); :: breakpoint(); } } while (0); |
| 56 | assert(metadata_blob != NULL, "invariant")do { if (!(metadata_blob != __null)) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/jfr/recorder/checkpoint/jfrMetadataEvent.cpp" , 56, "assert(" "metadata_blob != __null" ") failed", "invariant" ); ::breakpoint(); } } while (0); |
| 57 | DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(thread))JfrJavaSupport::check_java_thread_in_vm(thread); |
| 58 | const typeArrayOop arr = (typeArrayOop)JfrJavaSupport::resolve_non_null(metadata_blob); |
| 59 | assert(arr != NULL, "invariant")do { if (!(arr != __null)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/jfr/recorder/checkpoint/jfrMetadataEvent.cpp" , 59, "assert(" "arr != __null" ") failed", "invariant"); ::breakpoint (); } } while (0); |
| 60 | const int length = arr->length(); |
| 61 | const Klass* const k = arr->klass(); |
| 62 | assert(k != NULL && k->is_array_klass(), "invariant")do { if (!(k != __null && k->is_array_klass())) { ( *g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/jfr/recorder/checkpoint/jfrMetadataEvent.cpp" , 62, "assert(" "k != __null && k->is_array_klass()" ") failed", "invariant"); ::breakpoint(); } } while (0); |
| 63 | const TypeArrayKlass* const byte_arr_klass = TypeArrayKlass::cast(k); |
Value stored to 'byte_arr_klass' during its initialization is never read | |
| 64 | const jbyte* const data_address = arr->byte_at_addr(0); |
| 65 | chunkwriter.write_unbuffered(data_address, length); |
| 66 | } |
| 67 | |
| 68 | void JfrMetadataEvent::write(JfrChunkWriter& chunkwriter) { |
| 69 | assert(chunkwriter.is_valid(), "invariant")do { if (!(chunkwriter.is_valid())) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/jfr/recorder/checkpoint/jfrMetadataEvent.cpp" , 69, "assert(" "chunkwriter.is_valid()" ") failed", "invariant" ); ::breakpoint(); } } while (0); |
| 70 | check_internal_types(); |
| 71 | if (last_metadata_id == metadata_id && chunkwriter.has_metadata()) { |
| 72 | return; |
| 73 | } |
| 74 | JavaThread* const jt = JavaThread::current(); |
| 75 | DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_native(jt))JfrJavaSupport::check_java_thread_in_native(jt); |
| 76 | // can safepoint here |
| 77 | ThreadInVMfromNative transition(jt); |
| 78 | // header |
| 79 | const int64_t metadata_offset = chunkwriter.reserve(sizeof(u4)); |
| 80 | chunkwriter.write<u8>(EVENT_METADATA); // ID 0 |
| 81 | // time data |
| 82 | chunkwriter.write(JfrTicks::now()); |
| 83 | chunkwriter.write((u8)0); // duration |
| 84 | chunkwriter.write(metadata_id); // metadata id |
| 85 | write_metadata_blob(chunkwriter, jt); // payload |
| 86 | // fill in size of metadata descriptor event |
| 87 | const int64_t size_written = chunkwriter.current_offset() - metadata_offset; |
| 88 | chunkwriter.write_padded_at_offset((u4)size_written, metadata_offset); |
| 89 | chunkwriter.set_last_metadata_offset(metadata_offset); |
| 90 | last_metadata_id = metadata_id; |
| 91 | } |
| 92 | |
| 93 | void JfrMetadataEvent::update(jbyteArray metadata) { |
| 94 | JavaThread* thread = JavaThread::current(); |
| 95 | DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(thread))JfrJavaSupport::check_java_thread_in_vm(thread); |
| 96 | if (metadata_blob != NULL__null) { |
| 97 | JfrJavaSupport::destroy_global_jni_handle(metadata_blob); |
| 98 | } |
| 99 | const oop new_desc_oop = JfrJavaSupport::resolve_non_null(metadata); |
| 100 | assert(new_desc_oop != NULL, "invariant")do { if (!(new_desc_oop != __null)) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/jfr/recorder/checkpoint/jfrMetadataEvent.cpp" , 100, "assert(" "new_desc_oop != __null" ") failed", "invariant" ); ::breakpoint(); } } while (0); |
| 101 | metadata_blob = (jbyteArray)JfrJavaSupport::global_jni_handle(new_desc_oop, thread); |
| 102 | ++metadata_id; |
| 103 | } |