1 /*
2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "incls/_precompiled.incl"
26 #include "incls/_interpreter_x86_32.cpp.incl"
27
28 #define __ _masm->
29
30 // Initialize the sentinel used to distinguish an interpreter return address.
31 const int Interpreter::return_sentinel = 0xfeedbeed;
32
33 //------------------------------------------------------------------------------------------------------------------------
34
35 address AbstractInterpreterGenerator::generate_slow_signature_handler() {
36 address entry = __ pc();
37 // rbx,: method
38 // rcx: temporary
39 // rdi: pointer to locals
40 // rsp: end of copied parameters area
41 __ mov(rcx, rsp);
42 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::slow_signature_handler), rbx, rdi, rcx);
43 __ ret(0);
44 return entry;
45 }
46
47
48 //
49 // Various method entries (that c++ and asm interpreter agree upon)
50 //------------------------------------------------------------------------------------------------------------------------
51 //
52 //
53
54 // Empty method, generate a very fast return.
55
56 address InterpreterGenerator::generate_empty_entry(void) {
57
58 // rbx,: methodOop
59 // rcx: receiver (unused)
60 // rsi: previous interpreter state (C++ interpreter) must preserve
61 // rsi: sender sp must set sp to this value on return
62
63 if (!UseFastEmptyMethods) return NULL;
64
65 address entry_point = __ pc();
66
67 // If we need a safepoint check, generate full interpreter entry.
68 Label slow_path;
69 ExternalAddress state(SafepointSynchronize::address_of_state());
70 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
71 SafepointSynchronize::_not_synchronized);
72 __ jcc(Assembler::notEqual, slow_path);
73
74 // do nothing for empty methods (do not even increment invocation counter)
75 // Code: _return
76 // _return
77 // return w/o popping parameters
78 __ pop(rax);
79 __ mov(rsp, rsi);
80 __ jmp(rax);
81
82 __ bind(slow_path);
83 (void) generate_normal_entry(false);
84 return entry_point;
85 }
86
87 address InterpreterGenerator::generate_math_entry(AbstractInterpreter::MethodKind kind) {
88
89 // rbx,: methodOop
90 // rcx: scratrch
91 // rsi: sender sp
92
93 if (!InlineIntrinsics) return NULL; // Generate a vanilla entry
94
95 address entry_point = __ pc();
96
97 // These don't need a safepoint check because they aren't virtually
98 // callable. We won't enter these intrinsics from compiled code.
99 // If in the future we added an intrinsic which was virtually callable
100 // we'd have to worry about how to safepoint so that this code is used.
101
102 // mathematical functions inlined by compiler
103 // (interpreter must provide identical implementation
104 // in order to avoid monotonicity bugs when switching
105 // from interpreter to compiler in the middle of some
106 // computation)
107 //
108 // stack: [ ret adr ] <-- rsp
109 // [ lo(arg) ]
110 // [ hi(arg) ]
111 //
112
113 // Note: For JDK 1.2 StrictMath doesn't exist and Math.sin/cos/sqrt are
114 // native methods. Interpreter::method_kind(...) does a check for
115 // native methods first before checking for intrinsic methods and
116 // thus will never select this entry point. Make sure it is not
117 // called accidentally since the SharedRuntime entry points will
118 // not work for JDK 1.2.
119 //
120 // We no longer need to check for JDK 1.2 since it's EOL'ed.
121 // The following check existed in pre 1.6 implementation,
122 // if (Universe::is_jdk12x_version()) {
123 // __ should_not_reach_here();
124 // }
125 // Universe::is_jdk12x_version() always returns false since
126 // the JDK version is not yet determined when this method is called.
127 // This method is called during interpreter_init() whereas
128 // JDK version is only determined when universe2_init() is called.
129
130 // Note: For JDK 1.3 StrictMath exists and Math.sin/cos/sqrt are
131 // java methods. Interpreter::method_kind(...) will select
132 // this entry point for the corresponding methods in JDK 1.3.
133 // get argument
134 __ fld_d(Address(rsp, 1*wordSize));
135 switch (kind) {
136 case Interpreter::java_lang_math_sin :
137 __ trigfunc('s');
138 break;
139 case Interpreter::java_lang_math_cos :
140 __ trigfunc('c');
141 break;
142 case Interpreter::java_lang_math_tan :
143 __ trigfunc('t');
144 break;
145 case Interpreter::java_lang_math_sqrt:
146 __ fsqrt();
147 break;
148 case Interpreter::java_lang_math_abs:
149 __ fabs();
150 break;
151 case Interpreter::java_lang_math_log:
152 __ flog();
153 // Store to stack to convert 80bit precision back to 64bits
154 __ push_fTOS();
155 __ pop_fTOS();
156 break;
157 case Interpreter::java_lang_math_log10:
158 __ flog10();
159 // Store to stack to convert 80bit precision back to 64bits
160 __ push_fTOS();
161 __ pop_fTOS();
162 break;
163 default :
164 ShouldNotReachHere();
165 }
166
167 // return double result in xmm0 for interpreter and compilers.
168 if (UseSSE >= 2) {
169 __ subptr(rsp, 2*wordSize);
170 __ fstp_d(Address(rsp, 0));
171 __ movdbl(xmm0, Address(rsp, 0));
172 __ addptr(rsp, 2*wordSize);
173 }
174
175 // done, result in FPU ST(0) or XMM0
176 __ pop(rdi); // get return address
177 __ mov(rsp, rsi); // set sp to sender sp
178 __ jmp(rdi);
179
180 return entry_point;
181 }
182
183
184 // Abstract method entry
185 // Attempt to execute abstract method. Throw exception
186 address InterpreterGenerator::generate_abstract_entry(void) {
187
188 // rbx,: methodOop
189 // rcx: receiver (unused)
190 // rsi: previous interpreter state (C++ interpreter) must preserve
191
192 // rsi: sender SP
193
194 address entry_point = __ pc();
195
196 // abstract method entry
197
198 // pop return address, reset last_sp to NULL
199 __ empty_expression_stack();
200 __ restore_bcp(); // rsi must be correct for exception handler (was destroyed)
201 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed)
202
203 // throw exception
204 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodError));
205 // the call_VM checks for exception, so we should never return here.
206 __ should_not_reach_here();
207
208 return entry_point;
209 }
210
211
212 // Method handle invoker
213 // Dispatch a method of the form java.dyn.MethodHandles::invoke(...)
214 address InterpreterGenerator::generate_method_handle_entry(void) {
215 if (!EnableMethodHandles) {
216 return generate_abstract_entry();
217 }
218
219 address entry_point = MethodHandles::generate_method_handle_interpreter_entry(_masm);
220
221 return entry_point;
222 }
223
224
225 // This method tells the deoptimizer how big an interpreted frame must be:
226 int AbstractInterpreter::size_activation(methodOop method,
227 int tempcount,
228 int popframe_extra_args,
229 int moncount,
230 int callee_param_count,
231 int callee_locals,
232 bool is_top_frame) {
233 return layout_activation(method,
234 tempcount,
235 popframe_extra_args,
236 moncount,
237 callee_param_count,
238 callee_locals,
239 (frame*) NULL,
240 (frame*) NULL,
241 is_top_frame);
242 }
243
244 void Deoptimization::unwind_callee_save_values(frame* f, vframeArray* vframe_array) {
245
246 // This code is sort of the equivalent of C2IAdapter::setup_stack_frame back in
247 // the days we had adapter frames. When we deoptimize a situation where a
248 // compiled caller calls a compiled caller will have registers it expects
249 // to survive the call to the callee. If we deoptimize the callee the only
250 // way we can restore these registers is to have the oldest interpreter
251 // frame that we create restore these values. That is what this routine
252 // will accomplish.
253
254 // At the moment we have modified c2 to not have any callee save registers
255 // so this problem does not exist and this routine is just a place holder.
256
257 assert(f->is_interpreted_frame(), "must be interpreted");
258 }