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comparison test/runtime/InitialThreadOverflow/invoke.cxx @ 12144:d8e99408faad

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8009062: poor performance of JNI AttachCurrentThread after fix for 7017193 Summary: don't re-evaluate stack bounds for main thread before install guard page Reviewed-by: coleenp, dholmes, dlong
author dsamersoff
date Thu, 29 Aug 2013 21:48:23 +0400
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12142:76482cbba706 12144:d8e99408faad
1 /*
2 * Copyright (c) 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.
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 #include <assert.h>
25 #include <jni.h>
26
27 #include <pthread.h>
28
29 JavaVM* jvm;
30
31 void *
32 floobydust (void *p) {
33 JNIEnv *env;
34
35 jvm->AttachCurrentThread((void**)&env, NULL);
36
37 jclass class_id = env->FindClass ("DoOverflow");
38 assert (class_id);
39
40 jmethodID method_id = env->GetStaticMethodID(class_id, "printIt", "()V");
41 assert (method_id);
42
43 env->CallStaticVoidMethod(class_id, method_id, NULL);
44
45 jvm->DetachCurrentThread();
46 }
47
48 int
49 main (int argc, const char** argv) {
50 JavaVMOption options[1];
51 options[0].optionString = (char*) "-Xss320k";
52
53 JavaVMInitArgs vm_args;
54 vm_args.version = JNI_VERSION_1_2;
55 vm_args.ignoreUnrecognized = JNI_TRUE;
56 vm_args.options = options;
57 vm_args.nOptions = 1;
58
59 JNIEnv* env;
60 jint result = JNI_CreateJavaVM(&jvm, (void**)&env, &vm_args);
61 assert(result >= 0);
62
63 pthread_t thr;
64 pthread_create(&thr, NULL, floobydust, NULL);
65 pthread_join(thr, NULL);
66
67 floobydust(NULL);
68
69 return 0;
70 }