1 /*
 2  * Copyright (c) 2015, 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 
26 /*
27  *      Implementation of class StackStreamfactory and AbstractStackWalker
28  */
29 
30 #include <stdio.h>
31 #include <signal.h>
32 
33 #include "jni.h"
34 #include "jvm.h"
35 
36 #include "java_lang_StackStreamFactory.h"
37 #include "java_lang_StackStreamFactory_AbstractStackWalker.h"
38 
39 /*
40  * Class:     java_lang_StackStreamFactory
41  * Method:    checkStackWalkModes
42  * Signature: ()
43  */
44 JNIEXPORT jboolean JNICALL Java_java_lang_StackStreamFactory_checkStackWalkModes
45   (JNIEnv *env, jclass dummy)
46 {
47    return JVM_STACKWALK_FILL_CLASS_REFS_ONLY == java_lang_StackStreamFactory_FILL_CLASS_REFS_ONLY &&
48           JVM_STACKWALK_SHOW_HIDDEN_FRAMES == java_lang_StackStreamFactory_SHOW_HIDDEN_FRAMES &&
49           JVM_STACKWALK_FILL_LIVE_STACK_FRAMES == java_lang_StackStreamFactory_FILL_LIVE_STACK_FRAMES;
50 }
51 
52 /*
53  * Class:     java_lang_StackStreamFactory_AbstractStackWalker
54  * Method:    callStackWalk
55  * Signature: (JILjdk/internal/vm/ContinuationScope;Ljdk/internal/vm/Continuation;II[Ljava/lang/Object;)Ljava/lang/Object;
56  */
57 JNIEXPORT jobject JNICALL Java_java_lang_StackStreamFactory_00024AbstractStackWalker_callStackWalk
58   (JNIEnv *env, jobject stackstream, jlong mode, jint skipFrames, jobject contScope, jobject cont,
59    jint batchSize, jint startIndex, jobjectArray frames)
60 {
61     return JVM_CallStackWalk(env, stackstream, mode, skipFrames, contScope, cont,
62                              batchSize, startIndex, frames);
63 }
64 
65 /*
66  * Class:     java_lang_StackStreamFactory_AbstractStackWalker
67  * Method:    fetchStackFrames
68  * Signature: (JJII[Ljava/lang/Object;)I
69  */
70 JNIEXPORT jint JNICALL Java_java_lang_StackStreamFactory_00024AbstractStackWalker_fetchStackFrames
71   (JNIEnv *env, jobject stackstream, jlong mode, jlong anchor,
72    jint batchSize, jint startIndex, 
73    jobjectArray frames)
74 {
75     return JVM_MoreStackWalk(env, stackstream, mode, anchor, batchSize, 
76                              startIndex, frames);
77 }
78 
79 /*
80  * Class:     java_lang_StackStreamFactory_AbstractStackWalker
81  * Method:    setContinuation
82  * Signature: (J[Ljava/lang/Object;Ljdk/internal/vm/Continuation;)V
83  */
84 JNIEXPORT void JNICALL Java_java_lang_StackStreamFactory_00024AbstractStackWalker_setContinuation
85   (JNIEnv *env, jobject stackstream, jlong anchor, jobjectArray frames, jobject cont)
86 {
87   JVM_SetStackWalkContinuation(env, stackstream, anchor, frames, cont);
88 }