Mercurial > hg > truffle
diff src/share/vm/prims/jvm.cpp @ 12281:4f9a42c33738
8022887: Assertion hit while using class and redefining it with RedefineClasses simultaneously
Summary: Need to refetch each method from InstanceKlass after all safepoints. Removed leaky PreviousVersionInfo code.
Reviewed-by: dcubed, sspitsyn
author | coleenp |
---|---|
date | Fri, 20 Sep 2013 09:30:02 -0400 |
parents | ba9dacff9c9d |
children | 0f37d1badced |
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--- a/src/share/vm/prims/jvm.cpp Thu Sep 19 08:47:46 2013 +0200 +++ b/src/share/vm/prims/jvm.cpp Fri Sep 20 09:30:02 2013 -0400 @@ -1835,16 +1835,27 @@ } JVM_END -JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly)) -{ - JVMWrapper("JVM_GetClassDeclaredMethods"); +static bool select_method(methodHandle method, bool want_constructor) { + if (want_constructor) { + return (method->is_initializer() && !method->is_static()); + } else { + return (!method->is_initializer() && !method->is_overpass()); + } +} + +static jobjectArray get_class_declared_methods_helper( + JNIEnv *env, + jclass ofClass, jboolean publicOnly, + bool want_constructor, + Klass* klass, TRAPS) { + JvmtiVMObjectAllocEventCollector oam; // Exclude primitive types and array types if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) { // Return empty array - oop res = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), 0, CHECK_NULL); + oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL); return (jobjectArray) JNIHandles::make_local(env, res); } @@ -1855,87 +1866,67 @@ Array<Method*>* methods = k->methods(); int methods_length = methods->length(); + + // Save original method_idnum in case of redefinition, which can change + // the idnum of obsolete methods. The new method will have the same idnum + // but if we refresh the methods array, the counts will be wrong. + ResourceMark rm(THREAD); + GrowableArray<int>* idnums = new GrowableArray<int>(methods_length); int num_methods = 0; - int i; - for (i = 0; i < methods_length; i++) { + for (int i = 0; i < methods_length; i++) { methodHandle method(THREAD, methods->at(i)); - if (!method->is_initializer() && !method->is_overpass()) { + if (select_method(method, want_constructor)) { if (!publicOnly || method->is_public()) { + idnums->push(method->method_idnum()); ++num_methods; } } } // Allocate result - objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), num_methods, CHECK_NULL); + objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL); objArrayHandle result (THREAD, r); - int out_idx = 0; - for (i = 0; i < methods_length; i++) { - methodHandle method(THREAD, methods->at(i)); - if (!method->is_initializer() && !method->is_overpass()) { - if (!publicOnly || method->is_public()) { - oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL); - result->obj_at_put(out_idx, m); - ++out_idx; + // Now just put the methods that we selected above, but go by their idnum + // in case of redefinition. The methods can be redefined at any safepoint, + // so above when allocating the oop array and below when creating reflect + // objects. + for (int i = 0; i < num_methods; i++) { + methodHandle method(THREAD, k->method_with_idnum(idnums->at(i))); + if (method.is_null()) { + // Method may have been deleted and seems this API can handle null + // Otherwise should probably put a method that throws NSME + result->obj_at_put(i, NULL); + } else { + oop m; + if (want_constructor) { + m = Reflection::new_constructor(method, CHECK_NULL); + } else { + m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL); } + result->obj_at_put(i, m); } } - assert(out_idx == num_methods, "just checking"); + return (jobjectArray) JNIHandles::make_local(env, result()); } + +JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly)) +{ + JVMWrapper("JVM_GetClassDeclaredMethods"); + return get_class_declared_methods_helper(env, ofClass, publicOnly, + /*want_constructor*/ false, + SystemDictionary::reflect_Method_klass(), THREAD); +} JVM_END JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly)) { JVMWrapper("JVM_GetClassDeclaredConstructors"); - JvmtiVMObjectAllocEventCollector oam; - - // Exclude primitive types and array types - if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) - || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) { - // Return empty array - oop res = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0 , CHECK_NULL); - return (jobjectArray) JNIHandles::make_local(env, res); - } - - instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); - - // Ensure class is linked - k->link_class(CHECK_NULL); - - Array<Method*>* methods = k->methods(); - int methods_length = methods->length(); - int num_constructors = 0; - - int i; - for (i = 0; i < methods_length; i++) { - methodHandle method(THREAD, methods->at(i)); - if (method->is_initializer() && !method->is_static()) { - if (!publicOnly || method->is_public()) { - ++num_constructors; - } - } - } - - // Allocate result - objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), num_constructors, CHECK_NULL); - objArrayHandle result(THREAD, r); - - int out_idx = 0; - for (i = 0; i < methods_length; i++) { - methodHandle method(THREAD, methods->at(i)); - if (method->is_initializer() && !method->is_static()) { - if (!publicOnly || method->is_public()) { - oop m = Reflection::new_constructor(method, CHECK_NULL); - result->obj_at_put(out_idx, m); - ++out_idx; - } - } - } - assert(out_idx == num_constructors, "just checking"); - return (jobjectArray) JNIHandles::make_local(env, result()); + return get_class_declared_methods_helper(env, ofClass, publicOnly, + /*want_constructor*/ true, + SystemDictionary::reflect_Constructor_klass(), THREAD); } JVM_END