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 "precompiled.hpp"
26 #include "asm/assembler.hpp"
27 #include "interpreter/bytecodeHistogram.hpp"
28 #include "interpreter/interpreter.hpp"
29 #include "interpreter/interpreterGenerator.hpp"
30 #include "interpreter/interpreterRuntime.hpp"
31 #include "interpreter/templateTable.hpp"
32 #include "oops/arrayOop.hpp"
33 #include "oops/methodDataOop.hpp"
34 #include "oops/methodOop.hpp"
35 #include "oops/oop.inline.hpp"
36 #include "prims/jvmtiExport.hpp"
37 #include "prims/jvmtiThreadState.hpp"
38 #include "prims/methodHandles.hpp"
39 #include "runtime/arguments.hpp"
40 #include "runtime/deoptimization.hpp"
41 #include "runtime/frame.inline.hpp"
42 #include "runtime/sharedRuntime.hpp"
43 #include "runtime/stubRoutines.hpp"
44 #include "runtime/synchronizer.hpp"
45 #include "runtime/timer.hpp"
46 #include "runtime/vframeArray.hpp"
47 #include "utilities/debug.hpp"
48 #ifdef COMPILER1
49 #include "c1/c1_Runtime1.hpp"
50 #endif
51
52 #define __ _masm->
53
54 // Initialize the sentinel used to distinguish an interpreter return address.
55 const int Interpreter::return_sentinel = 0xfeedbeed;
56
57 //------------------------------------------------------------------------------------------------------------------------
58
59 address AbstractInterpreterGenerator::generate_slow_signature_handler() {
60 address entry = __ pc();
61 // rbx,: method
62 // rcx: temporary
63 // rdi: pointer to locals
64 // rsp: end of copied parameters area
65 __ mov(rcx, rsp);
66 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::slow_signature_handler), rbx, rdi, rcx);
67 __ ret(0);
68 return entry;
69 }
70
71
72 //
73 // Various method entries (that c++ and asm interpreter agree upon)
74 //------------------------------------------------------------------------------------------------------------------------
75 //
76 //
77
78 // Empty method, generate a very fast return.
79
80 address InterpreterGenerator::generate_empty_entry(void) {
81
82 // rbx,: methodOop
83 // rcx: receiver (unused)
84 // rsi: previous interpreter state (C++ interpreter) must preserve
85 // rsi: sender sp must set sp to this value on return
86
87 if (!UseFastEmptyMethods) return NULL;
88
89 address entry_point = __ pc();
90
91 // If we need a safepoint check, generate full interpreter entry.
92 Label slow_path;
93 ExternalAddress state(SafepointSynchronize::address_of_state());
94 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
95 SafepointSynchronize::_not_synchronized);
96 __ jcc(Assembler::notEqual, slow_path);
97
98 // do nothing for empty methods (do not even increment invocation counter)
99 // Code: _return
100 // _return
101 // return w/o popping parameters
102 __ pop(rax);
103 __ mov(rsp, rsi);
104 __ jmp(rax);
105
106 __ bind(slow_path);
107 (void) generate_normal_entry(false);
108 return entry_point;
109 }
110
111 address InterpreterGenerator::generate_math_entry(AbstractInterpreter::MethodKind kind) {
112
113 // rbx,: methodOop
114 // rcx: scratrch
115 // rsi: sender sp
116
117 if (!InlineIntrinsics) return NULL; // Generate a vanilla entry
118
119 address entry_point = __ pc();
120
121 // These don't need a safepoint check because they aren't virtually
122 // callable. We won't enter these intrinsics from compiled code.
123 // If in the future we added an intrinsic which was virtually callable
124 // we'd have to worry about how to safepoint so that this code is used.
125
126 // mathematical functions inlined by compiler
127 // (interpreter must provide identical implementation
128 // in order to avoid monotonicity bugs when switching
129 // from interpreter to compiler in the middle of some
130 // computation)
131 //
132 // stack: [ ret adr ] <-- rsp
133 // [ lo(arg) ]
134 // [ hi(arg) ]
135 //
136
137 // Note: For JDK 1.2 StrictMath doesn't exist and Math.sin/cos/sqrt are
138 // native methods. Interpreter::method_kind(...) does a check for
139 // native methods first before checking for intrinsic methods and
140 // thus will never select this entry point. Make sure it is not
141 // called accidentally since the SharedRuntime entry points will
142 // not work for JDK 1.2.
143 //
144 // We no longer need to check for JDK 1.2 since it's EOL'ed.
145 // The following check existed in pre 1.6 implementation,
146 // if (Universe::is_jdk12x_version()) {
147 // __ should_not_reach_here();
148 // }
149 // Universe::is_jdk12x_version() always returns false since
150 // the JDK version is not yet determined when this method is called.
151 // This method is called during interpreter_init() whereas
152 // JDK version is only determined when universe2_init() is called.
153
154 // Note: For JDK 1.3 StrictMath exists and Math.sin/cos/sqrt are
155 // java methods. Interpreter::method_kind(...) will select
156 // this entry point for the corresponding methods in JDK 1.3.
157 // get argument
158 __ fld_d(Address(rsp, 1*wordSize));
159 switch (kind) {
160 case Interpreter::java_lang_math_sin :
161 __ trigfunc('s');
162 break;
163 case Interpreter::java_lang_math_cos :
164 __ trigfunc('c');
165 break;
166 case Interpreter::java_lang_math_tan :
167 __ trigfunc('t');
168 break;
169 case Interpreter::java_lang_math_sqrt:
170 __ fsqrt();
171 break;
172 case Interpreter::java_lang_math_abs:
173 __ fabs();
174 break;
175 case Interpreter::java_lang_math_log:
176 __ flog();
177 // Store to stack to convert 80bit precision back to 64bits
178 __ push_fTOS();
179 __ pop_fTOS();
180 break;
181 case Interpreter::java_lang_math_log10:
182 __ flog10();
183 // Store to stack to convert 80bit precision back to 64bits
184 __ push_fTOS();
185 __ pop_fTOS();
186 break;
187 default :
188 ShouldNotReachHere();
189 }
190
191 // return double result in xmm0 for interpreter and compilers.
192 if (UseSSE >= 2) {
193 __ subptr(rsp, 2*wordSize);
194 __ fstp_d(Address(rsp, 0));
195 __ movdbl(xmm0, Address(rsp, 0));
196 __ addptr(rsp, 2*wordSize);
197 }
198
199 // done, result in FPU ST(0) or XMM0
200 __ pop(rdi); // get return address
201 __ mov(rsp, rsi); // set sp to sender sp
202 __ jmp(rdi);
203
204 return entry_point;
205 }
206
207
208 // Abstract method entry
209 // Attempt to execute abstract method. Throw exception
210 address InterpreterGenerator::generate_abstract_entry(void) {
211
212 // rbx,: methodOop
213 // rcx: receiver (unused)
214 // rsi: previous interpreter state (C++ interpreter) must preserve
215
216 // rsi: sender SP
217
218 address entry_point = __ pc();
219
220 // abstract method entry
221
222 // pop return address, reset last_sp to NULL
223 __ empty_expression_stack();
224 __ restore_bcp(); // rsi must be correct for exception handler (was destroyed)
225 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed)
226
227 // throw exception
228 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodError));
229 // the call_VM checks for exception, so we should never return here.
230 __ should_not_reach_here();
231
232 return entry_point;
233 }
234
235
236 // Method handle invoker
237 // Dispatch a method of the form java.dyn.MethodHandles::invoke(...)
238 address InterpreterGenerator::generate_method_handle_entry(void) {
239 if (!EnableMethodHandles) {
240 return generate_abstract_entry();
241 }
242
243 address entry_point = MethodHandles::generate_method_handle_interpreter_entry(_masm);
244
245 return entry_point;
246 }
247
248
249 // This method tells the deoptimizer how big an interpreted frame must be:
250 int AbstractInterpreter::size_activation(methodOop method,
251 int tempcount,
252 int popframe_extra_args,
253 int moncount,
254 int callee_param_count,
255 int callee_locals,
256 bool is_top_frame) {
257 return layout_activation(method,
258 tempcount,
259 popframe_extra_args,
260 moncount,
261 callee_param_count,
262 callee_locals,
263 (frame*) NULL,
264 (frame*) NULL,
265 is_top_frame);
266 }
267
268 void Deoptimization::unwind_callee_save_values(frame* f, vframeArray* vframe_array) {
269
270 // This code is sort of the equivalent of C2IAdapter::setup_stack_frame back in
271 // the days we had adapter frames. When we deoptimize a situation where a
272 // compiled caller calls a compiled caller will have registers it expects
273 // to survive the call to the callee. If we deoptimize the callee the only
274 // way we can restore these registers is to have the oldest interpreter
275 // frame that we create restore these values. That is what this routine
276 // will accomplish.
277
278 // At the moment we have modified c2 to not have any callee save registers
279 // so this problem does not exist and this routine is just a place holder.
280
281 assert(f->is_interpreted_frame(), "must be interpreted");
282 }