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src/share/vm/prims/jvmtiClassFileReconstituter.hpp@f008d3631bd1 (annotated)

src/share/vm/prims/jvmtiClassFileReconstituter.hpp

Wed, 08 Oct 2008 08:10:51 -0700

author

ksrini

date

Wed, 08 Oct 2008 08:10:51 -0700

changeset 823

f008d3631bd1

parent 435

a61af66fc99e

child 1907

c18cbe5936b8

permissions

-rw-r--r--

6755845: JVM_FindClassFromBoot triggers assertions
Summary: Fixes assertions caused by one jvm_entry calling another, solved by refactoring code and modified gamma test.
Reviewed-by: dholmes, xlu

duke@435	1	/*
duke@435	2	* Copyright 2005-2006 Sun Microsystems, Inc. All Rights Reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25
duke@435	26	class JvmtiConstantPoolReconstituter : public StackObj {
duke@435	27	private:
duke@435	28	int _cpool_size;
duke@435	29	SymbolHashMap* _symmap;
duke@435	30	SymbolHashMap* _classmap;
duke@435	31	constantPoolHandle _cpool;
duke@435	32	instanceKlassHandle _ikh;
duke@435	33	jvmtiError _err;
duke@435	34
duke@435	35	protected:
duke@435	36	instanceKlassHandle ikh() { return _ikh; };
duke@435	37	constantPoolHandle cpool() { return _cpool; };
duke@435	38
duke@435	39	u2 symbol_to_cpool_index(symbolOop sym) {
duke@435	40	return _symmap->symbol_to_value(sym);
duke@435	41	}
duke@435	42
duke@435	43	u2 class_symbol_to_cpool_index(symbolOop sym) {
duke@435	44	return _classmap->symbol_to_value(sym);
duke@435	45	}
duke@435	46
duke@435	47	public:
duke@435	48	// Calls to this constructor must be proceeded by a ResourceMark
duke@435	49	// and a HandleMark
duke@435	50	JvmtiConstantPoolReconstituter(instanceKlassHandle ikh){
duke@435	51	set_error(JVMTI_ERROR_NONE);
duke@435	52	_ikh = ikh;
duke@435	53	_cpool = constantPoolHandle(Thread::current(), ikh->constants());
duke@435	54	_symmap = new SymbolHashMap();
duke@435	55	_classmap = new SymbolHashMap();
duke@435	56	_cpool_size = _cpool->hash_entries_to(_symmap, _classmap);
duke@435	57	if (_cpool_size == 0) {
duke@435	58	set_error(JVMTI_ERROR_OUT_OF_MEMORY);
duke@435	59	} else if (_cpool_size < 0) {
duke@435	60	set_error(JVMTI_ERROR_INTERNAL);
duke@435	61	}
duke@435	62	}
duke@435	63
duke@435	64	~JvmtiConstantPoolReconstituter() {
duke@435	65	if (_symmap != NULL) {
duke@435	66	os::free(_symmap);
duke@435	67	_symmap = NULL;
duke@435	68	}
duke@435	69	if (_classmap != NULL) {
duke@435	70	os::free(_classmap);
duke@435	71	_classmap = NULL;
duke@435	72	}
duke@435	73	}
duke@435	74
duke@435	75
duke@435	76	void set_error(jvmtiError err) { _err = err; }
duke@435	77	jvmtiError get_error() { return _err; }
duke@435	78
duke@435	79	int cpool_size() { return _cpool_size; }
duke@435	80
duke@435	81	void copy_cpool_bytes(unsigned char *cpool_bytes) {
duke@435	82	if (cpool_bytes == NULL) {
duke@435	83	assert(cpool_bytes != NULL, "cpool_bytes pointer must not be NULL");
duke@435	84	return;
duke@435	85	}
duke@435	86	cpool()->copy_cpool_bytes(cpool_size(), _symmap, cpool_bytes);
duke@435	87	}
duke@435	88	};
duke@435	89
duke@435	90
duke@435	91	class JvmtiClassFileReconstituter : public JvmtiConstantPoolReconstituter {
duke@435	92	private:
duke@435	93	size_t _buffer_size;
duke@435	94	u1* _buffer;
duke@435	95	u1* _buffer_ptr;
duke@435	96	Thread* _thread;
duke@435	97
duke@435	98	enum {
duke@435	99	// initial size should be power of two
duke@435	100	initial_buffer_size = 1024
duke@435	101	};
duke@435	102
duke@435	103	inline Thread* thread() { return _thread; }
duke@435	104
duke@435	105	void write_class_file_format();
duke@435	106	void write_field_infos();
duke@435	107	void write_method_infos();
duke@435	108	void write_method_info(methodHandle method);
duke@435	109	void write_code_attribute(methodHandle method);
duke@435	110	void write_exceptions_attribute(constMethodHandle const_method);
duke@435	111	void write_synthetic_attribute();
duke@435	112	void write_class_attributes();
duke@435	113	void write_source_file_attribute();
duke@435	114	void write_source_debug_extension_attribute();
duke@435	115	u2 line_number_table_entries(methodHandle method);
duke@435	116	void write_line_number_table_attribute(methodHandle method, u2 num_entries);
duke@435	117	void write_stackmap_table_attribute(methodHandle method, int stackmap_table_len);
duke@435	118	u2 inner_classes_attribute_length();
duke@435	119	void write_inner_classes_attribute(int length);
duke@435	120	void write_signature_attribute(u2 generic_signaure_index);
duke@435	121	void write_attribute_name_index(const char* name);
duke@435	122	void write_annotations_attribute(const char* attr_name, typeArrayHandle annos);
duke@435	123
duke@435	124	address writeable_address(size_t size);
duke@435	125	void write_u1(u1 x);
duke@435	126	void write_u2(u2 x);
duke@435	127	void write_u4(u4 x);
duke@435	128	void write_u8(u8 x);
duke@435	129
duke@435	130	public:
duke@435	131	// Calls to this constructor must be proceeded by a ResourceMark
duke@435	132	// and a HandleMark
duke@435	133	JvmtiClassFileReconstituter(instanceKlassHandle ikh) :
duke@435	134	JvmtiConstantPoolReconstituter(ikh) {
duke@435	135	_buffer_size = initial_buffer_size;
duke@435	136	_buffer = _buffer_ptr = NEW_RESOURCE_ARRAY(u1, _buffer_size);
duke@435	137	_thread = Thread::current();
duke@435	138	write_class_file_format();
duke@435	139	};
duke@435	140
duke@435	141	size_t class_file_size() { return _buffer_ptr - _buffer; }
duke@435	142
duke@435	143	u1* class_file_bytes() { return _buffer; }
duke@435	144
duke@435	145	static void copy_bytecodes(methodHandle method, unsigned char* bytecodes);
duke@435	146	};