Bug Summary

File:jdk/src/java.desktop/share/native/libawt/java2d/Disposer.c
Warning:line 51, column 16
Value stored to 'clazz' during its initialization is never read

Annotated Source Code

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clang -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name Disposer.c -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 2 -mthread-model posix -fno-delete-null-pointer-checks -mframe-pointer=all -relaxed-aliasing -fmath-errno -fno-rounding-math -masm-verbose -mconstructor-aliases -munwind-tables -target-cpu x86-64 -dwarf-column-info -fno-split-dwarf-inlining -debugger-tuning=gdb -resource-dir /usr/lib/llvm-10/lib/clang/10.0.0 -I /home/daniel/Projects/java/jdk/build/linux-x86_64-server-fastdebug/support/modules_include/java.base -I /home/daniel/Projects/java/jdk/build/linux-x86_64-server-fastdebug/support/modules_include/java.base/linux -I /home/daniel/Projects/java/jdk/src/java.base/share/native/libjava -I /home/daniel/Projects/java/jdk/src/java.base/unix/native/libjava -I /home/daniel/Projects/java/jdk/src/hotspot/share/include -I /home/daniel/Projects/java/jdk/src/hotspot/os/posix/include -D LIBC=gnu -D _GNU_SOURCE -D _REENTRANT -D _LARGEFILE64_SOURCE -D LINUX -D DEBUG -D _LITTLE_ENDIAN -D ARCH="amd64" -D amd64 -D _LP64=1 -D __MEDIALIB_OLD_NAMES -D __USE_J2D_NAMES -D MLIB_NO_LIBSUNMATH -I /home/daniel/Projects/java/jdk/src/java.desktop/unix/native/libawt -I /home/daniel/Projects/java/jdk/src/java.desktop/share/native/libawt -I /home/daniel/Projects/java/jdk/src/java.desktop/share/native/common/awt/debug -I /home/daniel/Projects/java/jdk/src/java.desktop/unix/native/common/awt -I /home/daniel/Projects/java/jdk/build/linux-x86_64-server-fastdebug/support/headers/java.desktop -I /home/daniel/Projects/java/jdk/src/java.desktop/share/native/libawt/awt/image -I /home/daniel/Projects/java/jdk/src/java.desktop/share/native/libawt/awt/image/cvutils -I /home/daniel/Projects/java/jdk/src/java.desktop/unix/native/libawt/java2d -I /home/daniel/Projects/java/jdk/src/java.desktop/share/native/libawt/java2d -I /home/daniel/Projects/java/jdk/src/java.desktop/share/native/libawt/java2d/loops -I /home/daniel/Projects/java/jdk/src/java.desktop/share/native/libawt/java2d/pipe -I /home/daniel/Projects/java/jdk/build/linux-x86_64-server-fastdebug/support/headers/java.base -I /home/daniel/Projects/java/jdk/src/java.desktop/share/native/libawt/awt/medialib -I /home/daniel/Projects/java/jdk/src/java.desktop/share/native/common/awt/medialib -I /home/daniel/Projects/java/jdk/src/java.desktop/share/native/libmlib_image -I /home/daniel/Projects/java/jdk/src/java.desktop/unix/native/include -I /home/daniel/Projects/java/jdk/src/java.desktop/share/native/include -I /home/daniel/Projects/java/jdk/src/java.base/linux/native/libjava -I /home/daniel/Projects/java/jdk/src/java.base/unix/native/libjava -I /home/daniel/Projects/java/jdk/src/java.base/share/native/libjava -I /home/daniel/Projects/java/jdk/src/java.base/unix/native/include -I /home/daniel/Projects/java/jdk/src/java.base/share/native/include -D _FORTIFY_SOURCE=2 -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-10/lib/clang/10.0.0/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O3 -Wno-unused-parameter -Wno-unused -Wno-sign-compare -Wno-unused-result -Wno-maybe-uninitialized -Wno-format-nonliteral -Wno-parentheses -Wno-unused-value -Wno-unused-function -std=c99 -fdebug-compilation-dir /home/daniel/Projects/java/jdk/make -ferror-limit 19 -fmessage-length 0 -fvisibility default -stack-protector 1 -fgnuc-version=4.2.1 -fobjc-runtime=gcc -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-output=html -faddrsig -o /home/daniel/Projects/java/scan/2021-12-21-193737-8510-1 -x c /home/daniel/Projects/java/jdk/src/java.desktop/share/native/libawt/java2d/Disposer.c
1/*
2 * Copyright (c) 2002, 2013, 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25#include "jni_util.h"
26#include "Disposer.h"
27
28static jmethodID addRecordMID = NULL((void*)0);
29static jclass dispClass = NULL((void*)0);
30
31/*
32 * Class: sun_java2d_Disposer
33 * Method: initIDs
34 * Signature: ()V
35 */
36JNIEXPORT__attribute__((visibility("default"))) void JNICALL
37Java_sun_java2d_Disposer_initIDs(JNIEnv *env, jclass disposerClass)
38{
39 addRecordMID = (*env)->GetStaticMethodID(env, disposerClass, "addRecord",
40 "(Ljava/lang/Object;JJ)V");
41 if (addRecordMID != 0) {
42 dispClass = (*env)->NewGlobalRef(env, disposerClass);
43 }
44}
45
46JNIEXPORT__attribute__((visibility("default"))) void JNICALL
47Disposer_AddRecord(JNIEnv *env, jobject obj, GeneralDisposeFunc disposer, jlong pData) {
48
49 if (dispClass == NULL((void*)0)) {
50 /* Needed to initialize the Disposer class as it may be not yet referenced */
51 jclass clazz = (*env)->FindClass(env, "sun/java2d/Disposer");
Value stored to 'clazz' during its initialization is never read
52 if ((*env)->ExceptionCheck(env)) {
53 // If there's exception pending, we'll just return.
54 return;
55 }
56 }
57
58 (*env)->CallStaticVoidMethod(env, dispClass, addRecordMID,
59 obj, ptr_to_jlong(disposer)((jlong)(disposer)), pData);
60}
61
62/*
63 * Class: sun_java2d_DefaultDisposerRecord
64 * Method: invokeNativeDispose
65 * Signature: (JJ)V
66 */
67JNIEXPORT__attribute__((visibility("default"))) void JNICALL
68Java_sun_java2d_DefaultDisposerRecord_invokeNativeDispose(JNIEnv *env, jclass dispClass,
69 jlong disposer, jlong pData)
70{
71 if (disposer != 0 && pData != 0) {
72 GeneralDisposeFunc *disposeMethod = (GeneralDisposeFunc*)(jlong_to_ptr(disposer)((void*)(disposer)));
73 disposeMethod(env, pData);
74 }
75}