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view test/runtime/6929067/invoke.c @ 1960:878b57474103
6978187: G1: assert(ParallelGCThreads> 1 || n_yielded() == _hrrs->occupied()) strikes again
Summary: An evacuation failure while copying the roots caused an object, A, to be forwarded to itself. During the subsequent RSet updating a reference to A was processed causing the reference to be added to the RSet of A's heap region. As a result of adding to the remembered set we ran into the issue described in 6930581 - the sparse table expanded and the RSet scanning code walked the cards in one instance of RHashTable (_cur) while the occupied() counts the cards in the expanded table (_next).
Reviewed-by: tonyp, iveresov
author | johnc |
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date | Tue, 16 Nov 2010 14:07:33 -0800 |
parents | 3b3d12e645e7 |
children |
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#include <assert.h> #include <jni.h> #include <alloca.h> #include <pthread.h> union env_union { void *void_env; JNIEnv *jni_env; }; union env_union tmp; JNIEnv* env; JavaVM* jvm; JavaVMInitArgs vm_args; JavaVMOption options[1]; jclass class_id; jmethodID method_id; jint result; long product(unsigned long n, unsigned long m) { if (m == 1) { return n; } else { int *p = alloca(sizeof (int)); *p = n; return product (n, m-1) + *p; } } void * floobydust (void *p) { (*jvm)->AttachCurrentThread(jvm, &tmp.void_env, NULL); env = tmp.jni_env; class_id = (*env)->FindClass (env, "T"); assert (class_id); method_id = (*env)->GetStaticMethodID (env, class_id, "printIt", "()V"); assert (method_id); (*env)->CallStaticVoidMethod (env, class_id, method_id, NULL); (*jvm)->DetachCurrentThread(jvm); printf("%ld\n", product(5000,5000)); (*jvm)->AttachCurrentThread(jvm, &tmp.void_env, NULL); env = tmp.jni_env; class_id = (*env)->FindClass (env, "T"); assert (class_id); method_id = (*env)->GetStaticMethodID (env, class_id, "printIt", "()V"); assert (method_id); (*env)->CallStaticVoidMethod (env, class_id, method_id, NULL); (*jvm)->DetachCurrentThread(jvm); printf("%ld\n", product(5000,5000)); return NULL; } int main (int argc, const char** argv) { options[0].optionString = "-Xss320k"; vm_args.version = JNI_VERSION_1_2; vm_args.ignoreUnrecognized = JNI_TRUE; vm_args.options = options; vm_args.nOptions = 1; result = JNI_CreateJavaVM (&jvm, &tmp.void_env, &vm_args); assert (result >= 0); env = tmp.jni_env; floobydust (NULL); pthread_t thr; pthread_create (&thr, NULL, floobydust, NULL); pthread_join (thr, NULL); return 0; }