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src/cpu/sparc/vm/runtime_sparc.cpp@1d7922586cf6 (annotated)

src/cpu/sparc/vm/runtime_sparc.cpp

Tue, 24 Jul 2012 10:51:00 -0700

author

twisti

date

Tue, 24 Jul 2012 10:51:00 -0700

changeset 3969

1d7922586cf6

parent 2950

cba7b5c2d53f

child 4323

f0c2369fda5a

permissions

-rw-r--r--

7023639: JSR 292 method handle invocation needs a fast path for compiled code
6984705: JSR 292 method handle creation should not go through JNI
Summary: remove assembly code for JDK 7 chained method handles
Reviewed-by: jrose, twisti, kvn, mhaupt
Contributed-by: John Rose <john.r.rose@oracle.com>, Christian Thalinger <christian.thalinger@oracle.com>, Michael Haupt <michael.haupt@oracle.com>

duke@435	1	/*
never@2950	2	* Copyright (c) 1998, 2011, Oracle and/or its affiliates. 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	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
stefank@2314	25	#include "precompiled.hpp"
stefank@2314	26	#ifdef COMPILER2
stefank@2314	27	#include "asm/assembler.hpp"
stefank@2314	28	#include "assembler_sparc.inline.hpp"
stefank@2314	29	#include "classfile/systemDictionary.hpp"
stefank@2314	30	#include "code/vmreg.hpp"
stefank@2314	31	#include "interpreter/interpreter.hpp"
stefank@2314	32	#include "nativeInst_sparc.hpp"
stefank@2314	33	#include "opto/runtime.hpp"
stefank@2314	34	#include "runtime/interfaceSupport.hpp"
stefank@2314	35	#include "runtime/sharedRuntime.hpp"
stefank@2314	36	#include "runtime/stubRoutines.hpp"
stefank@2314	37	#include "runtime/vframeArray.hpp"
stefank@2314	38	#include "utilities/globalDefinitions.hpp"
stefank@2314	39	#include "vmreg_sparc.inline.hpp"
stefank@2314	40	#endif
duke@435	41
duke@435	42
duke@435	43	#define __ masm->
duke@435	44
duke@435	45	//------------------------------ generate_exception_blob ---------------------------
duke@435	46	// creates exception blob at the end
duke@435	47	// Using exception blob, this code is jumped from a compiled method.
duke@435	48	// (see emit_exception_handler in sparc.ad file)
duke@435	49	//
duke@435	50	// Given an exception pc at a call we call into the runtime for the
duke@435	51	// handler in this method. This handler might merely restore state
duke@435	52	// (i.e. callee save registers) unwind the frame and jump to the
duke@435	53	// exception handler for the nmethod if there is no Java level handler
duke@435	54	// for the nmethod.
duke@435	55	//
duke@435	56	// This code is entered with a jmp.
duke@435	57	//
duke@435	58	// Arguments:
duke@435	59	// O0: exception oop
duke@435	60	// O1: exception pc
duke@435	61	//
duke@435	62	// Results:
duke@435	63	// O0: exception oop
duke@435	64	// O1: exception pc in caller or ???
duke@435	65	// destination: exception handler of caller
duke@435	66	//
duke@435	67	// Note: the exception pc MUST be at a call (precise debug information)
duke@435	68	//
duke@435	69	void OptoRuntime::generate_exception_blob() {
duke@435	70	// allocate space for code
duke@435	71	ResourceMark rm;
duke@435	72	int pad = VerifyThread ? 256 : 0;// Extra slop space for more verify code
duke@435	73
duke@435	74	// setup code generation tools
duke@435	75	// Measured 8/7/03 at 256 in 32bit debug build (no VerifyThread)
duke@435	76	// Measured 8/7/03 at 528 in 32bit debug build (VerifyThread)
duke@435	77	CodeBuffer buffer("exception_blob", 600+pad, 512);
duke@435	78	MacroAssembler* masm = new MacroAssembler(&buffer);
duke@435	79
duke@435	80	int framesize_in_bytes = __ total_frame_size_in_bytes(0);
duke@435	81	int framesize_in_words = framesize_in_bytes / wordSize;
duke@435	82	int framesize_in_slots = framesize_in_bytes / sizeof(jint);
duke@435	83
duke@435	84	Label L;
duke@435	85
duke@435	86	int start = __ offset();
duke@435	87
duke@435	88	__ verify_thread();
twisti@1162	89	__ st_ptr(Oexception, G2_thread, JavaThread::exception_oop_offset());
twisti@1162	90	__ st_ptr(Oissuing_pc, G2_thread, JavaThread::exception_pc_offset());
duke@435	91
duke@435	92	// This call does all the hard work. It checks if an exception catch
duke@435	93	// exists in the method.
duke@435	94	// If so, it returns the handler address.
duke@435	95	// If the nmethod has been deoptimized and it had a handler the handler
duke@435	96	// address is the deopt blob unpack_with_exception entry.
duke@435	97	//
duke@435	98	// If no handler exists it prepares for stack-unwinding, restoring the callee-save
duke@435	99	// registers of the frame being removed.
duke@435	100	//
duke@435	101	__ save_frame(0);
duke@435	102
duke@435	103	__ mov(G2_thread, O0);
duke@435	104	__ set_last_Java_frame(SP, noreg);
duke@435	105	__ save_thread(L7_thread_cache);
duke@435	106
duke@435	107	// This call can block at exit and nmethod can be deoptimized at that
duke@435	108	// point. If the nmethod had a catch point we would jump to the
duke@435	109	// now deoptimized catch point and fall thru the vanilla deopt
duke@435	110	// path and lose the exception
duke@435	111	// Sure would be simpler if this call didn't block!
duke@435	112	__ call(CAST_FROM_FN_PTR(address, OptoRuntime::handle_exception_C), relocInfo::runtime_call_type);
duke@435	113	__ delayed()->mov(L7_thread_cache, O0);
duke@435	114
duke@435	115	// Set an oopmap for the call site. This oopmap will only be used if we
duke@435	116	// are unwinding the stack. Hence, all locations will be dead.
duke@435	117	// Callee-saved registers will be the same as the frame above (i.e.,
duke@435	118	// handle_exception_stub), since they were restored when we got the
duke@435	119	// exception.
duke@435	120
duke@435	121	OopMapSet *oop_maps = new OopMapSet();
duke@435	122	oop_maps->add_gc_map( __ offset()-start, new OopMap(framesize_in_slots, 0));
duke@435	123
duke@435	124	__ bind(L);
duke@435	125	__ restore_thread(L7_thread_cache);
duke@435	126	__ reset_last_Java_frame();
duke@435	127
duke@435	128	__ mov(O0, G3_scratch); // Move handler address to temp
duke@435	129	__ restore();
duke@435	130
twisti@1922	131	// Restore SP from L7 if the exception PC is a MethodHandle call site.
twisti@1922	132	__ lduw(Address(G2_thread, JavaThread::is_method_handle_return_offset()), O7);
twisti@1922	133	__ tst(O7);
twisti@1922	134	__ movcc(Assembler::notZero, false, Assembler::icc, L7_mh_SP_save, SP);
twisti@1922	135
duke@435	136	// G3_scratch contains handler address
duke@435	137	// Since this may be the deopt blob we must set O7 to look like we returned
duke@435	138	// from the original pc that threw the exception
duke@435	139
twisti@1162	140	__ ld_ptr(G2_thread, JavaThread::exception_pc_offset(), O7);
duke@435	141	__ sub(O7, frame::pc_return_offset, O7);
duke@435	142
duke@435	143
duke@435	144	assert(Assembler::is_simm13(in_bytes(JavaThread::exception_oop_offset())), "exception offset overflows simm13, following ld instruction cannot be in delay slot");
twisti@1162	145	__ ld_ptr(G2_thread, JavaThread::exception_oop_offset(), Oexception); // O0
duke@435	146	#ifdef ASSERT
twisti@1162	147	__ st_ptr(G0, G2_thread, JavaThread::exception_handler_pc_offset());
twisti@1162	148	__ st_ptr(G0, G2_thread, JavaThread::exception_pc_offset());
duke@435	149	#endif
duke@435	150	__ JMP(G3_scratch, 0);
duke@435	151	// Clear the exception oop so GC no longer processes it as a root.
twisti@1162	152	__ delayed()->st_ptr(G0, G2_thread, JavaThread::exception_oop_offset());
duke@435	153
duke@435	154	// -------------
duke@435	155	// make sure all code is generated
duke@435	156	masm->flush();
duke@435	157
duke@435	158	_exception_blob = ExceptionBlob::create(&buffer, oop_maps, framesize_in_words);
duke@435	159	}