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src/cpu/x86/vm/interpreter_x86_32.cpp@b6aedd1acdc0 (annotated)

src/cpu/x86/vm/interpreter_x86_32.cpp

Thu, 07 Oct 2010 08:06:06 -0700

author

coleenp

date

Thu, 07 Oct 2010 08:06:06 -0700

changeset 2222

b6aedd1acdc0

parent 1907

c18cbe5936b8

child 2314

f95d63e2154a

permissions

-rw-r--r--

6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
Summary: min_stack_allowed is a compile time constant and Stack*Pages are settable
Reviewed-by: dholmes, kvn

duke@435	1	/*
trims@1907	2	* Copyright (c) 1997, 2010, 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
duke@435	25	#include "incls/_precompiled.incl"
duke@435	26	#include "incls/_interpreter_x86_32.cpp.incl"
duke@435	27
duke@435	28	#define __ _masm->
duke@435	29
duke@435	30	// Initialize the sentinel used to distinguish an interpreter return address.
duke@435	31	const int Interpreter::return_sentinel = 0xfeedbeed;
duke@435	32
duke@435	33	//------------------------------------------------------------------------------------------------------------------------
duke@435	34
duke@435	35	address AbstractInterpreterGenerator::generate_slow_signature_handler() {
duke@435	36	address entry = __ pc();
duke@435	37	// rbx,: method
duke@435	38	// rcx: temporary
duke@435	39	// rdi: pointer to locals
duke@435	40	// rsp: end of copied parameters area
never@739	41	__ mov(rcx, rsp);
duke@435	42	__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::slow_signature_handler), rbx, rdi, rcx);
duke@435	43	__ ret(0);
duke@435	44	return entry;
duke@435	45	}
duke@435	46
duke@435	47
duke@435	48	//
duke@435	49	// Various method entries (that c++ and asm interpreter agree upon)
duke@435	50	//------------------------------------------------------------------------------------------------------------------------
duke@435	51	//
duke@435	52	//
duke@435	53
duke@435	54	// Empty method, generate a very fast return.
duke@435	55
duke@435	56	address InterpreterGenerator::generate_empty_entry(void) {
duke@435	57
duke@435	58	// rbx,: methodOop
duke@435	59	// rcx: receiver (unused)
duke@435	60	// rsi: previous interpreter state (C++ interpreter) must preserve
duke@435	61	// rsi: sender sp must set sp to this value on return
duke@435	62
duke@435	63	if (!UseFastEmptyMethods) return NULL;
duke@435	64
duke@435	65	address entry_point = __ pc();
duke@435	66
duke@435	67	// If we need a safepoint check, generate full interpreter entry.
duke@435	68	Label slow_path;
duke@435	69	ExternalAddress state(SafepointSynchronize::address_of_state());
duke@435	70	__ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
duke@435	71	SafepointSynchronize::_not_synchronized);
duke@435	72	__ jcc(Assembler::notEqual, slow_path);
duke@435	73
duke@435	74	// do nothing for empty methods (do not even increment invocation counter)
duke@435	75	// Code: _return
duke@435	76	// _return
duke@435	77	// return w/o popping parameters
never@739	78	__ pop(rax);
never@739	79	__ mov(rsp, rsi);
duke@435	80	__ jmp(rax);
duke@435	81
duke@435	82	__ bind(slow_path);
duke@435	83	(void) generate_normal_entry(false);
duke@435	84	return entry_point;
duke@435	85	}
duke@435	86
duke@435	87	address InterpreterGenerator::generate_math_entry(AbstractInterpreter::MethodKind kind) {
duke@435	88
duke@435	89	// rbx,: methodOop
duke@435	90	// rcx: scratrch
duke@435	91	// rsi: sender sp
duke@435	92
duke@435	93	if (!InlineIntrinsics) return NULL; // Generate a vanilla entry
duke@435	94
duke@435	95	address entry_point = __ pc();
duke@435	96
duke@435	97	// These don't need a safepoint check because they aren't virtually
duke@435	98	// callable. We won't enter these intrinsics from compiled code.
duke@435	99	// If in the future we added an intrinsic which was virtually callable
duke@435	100	// we'd have to worry about how to safepoint so that this code is used.
duke@435	101
duke@435	102	// mathematical functions inlined by compiler
duke@435	103	// (interpreter must provide identical implementation
duke@435	104	// in order to avoid monotonicity bugs when switching
duke@435	105	// from interpreter to compiler in the middle of some
duke@435	106	// computation)
duke@435	107	//
duke@435	108	// stack: [ ret adr ] <-- rsp
duke@435	109	// [ lo(arg) ]
duke@435	110	// [ hi(arg) ]
duke@435	111	//
duke@435	112
duke@435	113	// Note: For JDK 1.2 StrictMath doesn't exist and Math.sin/cos/sqrt are
duke@435	114	// native methods. Interpreter::method_kind(...) does a check for
duke@435	115	// native methods first before checking for intrinsic methods and
duke@435	116	// thus will never select this entry point. Make sure it is not
duke@435	117	// called accidentally since the SharedRuntime entry points will
duke@435	118	// not work for JDK 1.2.
duke@435	119	//
duke@435	120	// We no longer need to check for JDK 1.2 since it's EOL'ed.
duke@435	121	// The following check existed in pre 1.6 implementation,
duke@435	122	// if (Universe::is_jdk12x_version()) {
duke@435	123	// __ should_not_reach_here();
duke@435	124	// }
duke@435	125	// Universe::is_jdk12x_version() always returns false since
duke@435	126	// the JDK version is not yet determined when this method is called.
duke@435	127	// This method is called during interpreter_init() whereas
duke@435	128	// JDK version is only determined when universe2_init() is called.
duke@435	129
duke@435	130	// Note: For JDK 1.3 StrictMath exists and Math.sin/cos/sqrt are
duke@435	131	// java methods. Interpreter::method_kind(...) will select
duke@435	132	// this entry point for the corresponding methods in JDK 1.3.
duke@435	133	// get argument
twisti@1861	134	__ fld_d(Address(rsp, 1*wordSize));
duke@435	135	switch (kind) {
duke@435	136	case Interpreter::java_lang_math_sin :
duke@435	137	__ trigfunc('s');
duke@435	138	break;
duke@435	139	case Interpreter::java_lang_math_cos :
duke@435	140	__ trigfunc('c');
duke@435	141	break;
duke@435	142	case Interpreter::java_lang_math_tan :
duke@435	143	__ trigfunc('t');
duke@435	144	break;
duke@435	145	case Interpreter::java_lang_math_sqrt:
duke@435	146	__ fsqrt();
duke@435	147	break;
duke@435	148	case Interpreter::java_lang_math_abs:
duke@435	149	__ fabs();
duke@435	150	break;
duke@435	151	case Interpreter::java_lang_math_log:
duke@435	152	__ flog();
duke@435	153	// Store to stack to convert 80bit precision back to 64bits
duke@435	154	__ push_fTOS();
duke@435	155	__ pop_fTOS();
duke@435	156	break;
duke@435	157	case Interpreter::java_lang_math_log10:
duke@435	158	__ flog10();
duke@435	159	// Store to stack to convert 80bit precision back to 64bits
duke@435	160	__ push_fTOS();
duke@435	161	__ pop_fTOS();
duke@435	162	break;
duke@435	163	default :
duke@435	164	ShouldNotReachHere();
duke@435	165	}
duke@435	166
duke@435	167	// return double result in xmm0 for interpreter and compilers.
duke@435	168	if (UseSSE >= 2) {
never@739	169	__ subptr(rsp, 2*wordSize);
duke@435	170	__ fstp_d(Address(rsp, 0));
duke@435	171	__ movdbl(xmm0, Address(rsp, 0));
never@739	172	__ addptr(rsp, 2*wordSize);
duke@435	173	}
duke@435	174
duke@435	175	// done, result in FPU ST(0) or XMM0
never@739	176	__ pop(rdi); // get return address
never@739	177	__ mov(rsp, rsi); // set sp to sender sp
duke@435	178	__ jmp(rdi);
duke@435	179
duke@435	180	return entry_point;
duke@435	181	}
duke@435	182
duke@435	183
duke@435	184	// Abstract method entry
duke@435	185	// Attempt to execute abstract method. Throw exception
duke@435	186	address InterpreterGenerator::generate_abstract_entry(void) {
duke@435	187
duke@435	188	// rbx,: methodOop
duke@435	189	// rcx: receiver (unused)
duke@435	190	// rsi: previous interpreter state (C++ interpreter) must preserve
duke@435	191
duke@435	192	// rsi: sender SP
duke@435	193
duke@435	194	address entry_point = __ pc();
duke@435	195
duke@435	196	// abstract method entry
duke@435	197
jrose@1145	198	// pop return address, reset last_sp to NULL
jrose@1145	199	__ empty_expression_stack();
jrose@1145	200	__ restore_bcp(); // rsi must be correct for exception handler (was destroyed)
jrose@1145	201	__ restore_locals(); // make sure locals pointer is correct as well (was destroyed)
jrose@1145	202
duke@435	203	// throw exception
duke@435	204	__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodError));
duke@435	205	// the call_VM checks for exception, so we should never return here.
duke@435	206	__ should_not_reach_here();
duke@435	207
duke@435	208	return entry_point;
duke@435	209	}
duke@435	210
jrose@1145	211
jrose@1145	212	// Method handle invoker
jrose@1145	213	// Dispatch a method of the form java.dyn.MethodHandles::invoke(...)
jrose@1145	214	address InterpreterGenerator::generate_method_handle_entry(void) {
jrose@1145	215	if (!EnableMethodHandles) {
jrose@1145	216	return generate_abstract_entry();
jrose@1145	217	}
jrose@1145	218
jrose@1145	219	address entry_point = MethodHandles::generate_method_handle_interpreter_entry(_masm);
jrose@1145	220
jrose@1145	221	return entry_point;
jrose@1145	222	}
jrose@1145	223
jrose@1145	224
duke@435	225	// This method tells the deoptimizer how big an interpreted frame must be:
duke@435	226	int AbstractInterpreter::size_activation(methodOop method,
duke@435	227	int tempcount,
duke@435	228	int popframe_extra_args,
duke@435	229	int moncount,
duke@435	230	int callee_param_count,
duke@435	231	int callee_locals,
duke@435	232	bool is_top_frame) {
duke@435	233	return layout_activation(method,
duke@435	234	tempcount,
duke@435	235	popframe_extra_args,
duke@435	236	moncount,
duke@435	237	callee_param_count,
duke@435	238	callee_locals,
duke@435	239	(frame*) NULL,
duke@435	240	(frame*) NULL,
duke@435	241	is_top_frame);
duke@435	242	}
duke@435	243
duke@435	244	void Deoptimization::unwind_callee_save_values(frame* f, vframeArray* vframe_array) {
duke@435	245
duke@435	246	// This code is sort of the equivalent of C2IAdapter::setup_stack_frame back in
duke@435	247	// the days we had adapter frames. When we deoptimize a situation where a
duke@435	248	// compiled caller calls a compiled caller will have registers it expects
duke@435	249	// to survive the call to the callee. If we deoptimize the callee the only
duke@435	250	// way we can restore these registers is to have the oldest interpreter
duke@435	251	// frame that we create restore these values. That is what this routine
duke@435	252	// will accomplish.
duke@435	253
duke@435	254	// At the moment we have modified c2 to not have any callee save registers
duke@435	255	// so this problem does not exist and this routine is just a place holder.
duke@435	256
duke@435	257	assert(f->is_interpreted_frame(), "must be interpreted");
duke@435	258	}