6906727: UseCompressedOops: some card-marking fixes related to object arrays
Summary: Introduced a new write_ref_array(HeapWords* start, size_t count) method that does the requisite MemRegion range calculation so (some of the) clients of the erstwhile write_ref_array(MemRegion mr) do not need to worry. This removed all external uses of array_size(), which was also simplified and made private. Asserts were added to catch other possible issues. Further, less essential, fixes stemming from this investigation are deferred to CR 6904516 (to follow shortly in hs17).
Reviewed-by: kvn, coleenp, jmasa
/*
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* 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).
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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// NativeLookup provides an interface for finding DLL entry points for
// Java native functions.
class NativeLookup : AllStatic {
private:
// JNI name computation
static char* pure_jni_name(methodHandle method);
static char* long_jni_name(methodHandle method);
// Style specific lookup
static address lookup_style(methodHandle method, char* pure_name, const char* long_name, int args_size, bool os_style, bool& in_base_library, TRAPS);
static address lookup_base (methodHandle method, bool& in_base_library, TRAPS);
static address lookup_entry(methodHandle method, bool& in_base_library, TRAPS);
static address lookup_entry_prefixed(methodHandle method, bool& in_base_library, TRAPS);
public:
// Lookup native function. May throw UnsatisfiedLinkError.
static address lookup(methodHandle method, bool& in_base_library, TRAPS);
// Lookup native functions in base library.
static address base_library_lookup(const char* class_name, const char* method_name, const char* signature);
};