Mercurial > hg > truffle
diff test/runtime/InitialThreadOverflow/invoke.cxx @ 12144:d8e99408faad
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 |
parents | |
children |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/test/runtime/InitialThreadOverflow/invoke.cxx Thu Aug 29 21:48:23 2013 +0400 @@ -0,0 +1,70 @@ +/* + * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +#include <assert.h> +#include <jni.h> + +#include <pthread.h> + +JavaVM* jvm; + +void * +floobydust (void *p) { + JNIEnv *env; + + jvm->AttachCurrentThread((void**)&env, NULL); + + jclass class_id = env->FindClass ("DoOverflow"); + assert (class_id); + + jmethodID method_id = env->GetStaticMethodID(class_id, "printIt", "()V"); + assert (method_id); + + env->CallStaticVoidMethod(class_id, method_id, NULL); + + jvm->DetachCurrentThread(); +} + +int +main (int argc, const char** argv) { + JavaVMOption options[1]; + options[0].optionString = (char*) "-Xss320k"; + + JavaVMInitArgs vm_args; + vm_args.version = JNI_VERSION_1_2; + vm_args.ignoreUnrecognized = JNI_TRUE; + vm_args.options = options; + vm_args.nOptions = 1; + + JNIEnv* env; + jint result = JNI_CreateJavaVM(&jvm, (void**)&env, &vm_args); + assert(result >= 0); + + pthread_t thr; + pthread_create(&thr, NULL, floobydust, NULL); + pthread_join(thr, NULL); + + floobydust(NULL); + + return 0; +}