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comparison src/cpu/zero/vm/stubGenerator_zero.cpp @ 1010:354d3184f6b2

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6890308: integrate zero assembler hotspot changes Reviewed-by: never Contributed-by: gbenson@redhat.com
author never
date Tue, 13 Oct 2009 12:04:21 -0700
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children f9271ff9d324
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1009:03b336640699 1010:354d3184f6b2
1 /*
2 * Copyright 2003-2007 Sun Microsystems, Inc. All Rights Reserved.
3 * Copyright 2007, 2008 Red Hat, Inc.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
22 * have any questions.
23 *
24 */
25
26 #include "incls/_precompiled.incl"
27 #include "incls/_stubGenerator_zero.cpp.incl"
28
29 // Declaration and definition of StubGenerator (no .hpp file).
30 // For a more detailed description of the stub routine structure
31 // see the comment in stubRoutines.hpp
32
33 class StubGenerator: public StubCodeGenerator {
34 private:
35 // The call stub is used to call Java from C
36 static void call_stub(
37 JavaCallWrapper *call_wrapper,
38 intptr_t* result,
39 BasicType result_type,
40 methodOop method,
41 address entry_point,
42 intptr_t* parameters,
43 int parameter_words,
44 TRAPS) {
45 JavaThread *thread = (JavaThread *) THREAD;
46 ZeroStack *stack = thread->zero_stack();
47
48 // Make sure we have no pending exceptions
49 assert(!HAS_PENDING_EXCEPTION, "call_stub called with pending exception");
50
51 // Set up the stack if necessary
52 bool stack_needs_teardown = false;
53 if (stack->needs_setup()) {
54 size_t stack_used = thread->stack_base() - (address) &stack_used;
55 size_t stack_free = thread->stack_size() - stack_used;
56 size_t zero_stack_size = align_size_down(stack_free / 2, wordSize);
57
58 stack->setup(alloca(zero_stack_size), zero_stack_size);
59 stack_needs_teardown = true;
60 }
61
62 // Allocate and initialize our frame
63 thread->push_zero_frame(
64 EntryFrame::build(stack, parameters, parameter_words, call_wrapper));
65
66 // Make the call
67 Interpreter::invoke_method(method, entry_point, THREAD);
68
69 // Store result depending on type
70 if (!HAS_PENDING_EXCEPTION) {
71 switch (result_type) {
72 case T_INT:
73 *(jint *) result = *(jint *) stack->sp();
74 break;
75 case T_LONG:
76 *(jlong *) result = *(jlong *) stack->sp();
77 break;
78 case T_FLOAT:
79 *(jfloat *) result = *(jfloat *) stack->sp();
80 break;
81 case T_DOUBLE:
82 *(jdouble *) result = *(jdouble *) stack->sp();
83 break;
84 case T_OBJECT:
85 *(oop *) result = *(oop *) stack->sp();
86 break;
87 default:
88 ShouldNotReachHere();
89 }
90 }
91
92 // Unwind our frame
93 thread->pop_zero_frame();
94
95 // Tear down the stack if necessary
96 if (stack_needs_teardown)
97 stack->teardown();
98 }
99
100 // These stubs get called from some dumb test routine.
101 // I'll write them properly when they're called from
102 // something that's actually doing something.
103 static void fake_arraycopy_stub(address src, address dst, int count) {
104 assert(count == 0, "huh?");
105 }
106
107 void generate_arraycopy_stubs() {
108 // Call the conjoint generation methods immediately after
109 // the disjoint ones so that short branches from the former
110 // to the latter can be generated.
111 StubRoutines::_jbyte_disjoint_arraycopy = (address) fake_arraycopy_stub;
112 StubRoutines::_jbyte_arraycopy = (address) fake_arraycopy_stub;
113
114 StubRoutines::_jshort_disjoint_arraycopy = (address) fake_arraycopy_stub;
115 StubRoutines::_jshort_arraycopy = (address) fake_arraycopy_stub;
116
117 StubRoutines::_jint_disjoint_arraycopy = (address) fake_arraycopy_stub;
118 StubRoutines::_jint_arraycopy = (address) fake_arraycopy_stub;
119
120 StubRoutines::_jlong_disjoint_arraycopy = (address) fake_arraycopy_stub;
121 StubRoutines::_jlong_arraycopy = (address) fake_arraycopy_stub;
122
123 StubRoutines::_oop_disjoint_arraycopy = ShouldNotCallThisStub();
124 StubRoutines::_oop_arraycopy = ShouldNotCallThisStub();
125
126 StubRoutines::_checkcast_arraycopy = ShouldNotCallThisStub();
127 StubRoutines::_unsafe_arraycopy = ShouldNotCallThisStub();
128 StubRoutines::_generic_arraycopy = ShouldNotCallThisStub();
129
130 // We don't generate specialized code for HeapWord-aligned source
131 // arrays, so just use the code we've already generated
132 StubRoutines::_arrayof_jbyte_disjoint_arraycopy =
133 StubRoutines::_jbyte_disjoint_arraycopy;
134 StubRoutines::_arrayof_jbyte_arraycopy =
135 StubRoutines::_jbyte_arraycopy;
136
137 StubRoutines::_arrayof_jshort_disjoint_arraycopy =
138 StubRoutines::_jshort_disjoint_arraycopy;
139 StubRoutines::_arrayof_jshort_arraycopy =
140 StubRoutines::_jshort_arraycopy;
141
142 StubRoutines::_arrayof_jint_disjoint_arraycopy =
143 StubRoutines::_jint_disjoint_arraycopy;
144 StubRoutines::_arrayof_jint_arraycopy =
145 StubRoutines::_jint_arraycopy;
146
147 StubRoutines::_arrayof_jlong_disjoint_arraycopy =
148 StubRoutines::_jlong_disjoint_arraycopy;
149 StubRoutines::_arrayof_jlong_arraycopy =
150 StubRoutines::_jlong_arraycopy;
151
152 StubRoutines::_arrayof_oop_disjoint_arraycopy =
153 StubRoutines::_oop_disjoint_arraycopy;
154 StubRoutines::_arrayof_oop_arraycopy =
155 StubRoutines::_oop_arraycopy;
156 }
157
158 void generate_initial() {
159 // Generates all stubs and initializes the entry points
160
161 // entry points that exist in all platforms Note: This is code
162 // that could be shared among different platforms - however the
163 // benefit seems to be smaller than the disadvantage of having a
164 // much more complicated generator structure. See also comment in
165 // stubRoutines.hpp.
166
167 StubRoutines::_forward_exception_entry = ShouldNotCallThisStub();
168 StubRoutines::_call_stub_entry = (address) call_stub;
169 StubRoutines::_catch_exception_entry = ShouldNotCallThisStub();
170
171 // atomic calls
172 StubRoutines::_atomic_xchg_entry = ShouldNotCallThisStub();
173 StubRoutines::_atomic_xchg_ptr_entry = ShouldNotCallThisStub();
174 StubRoutines::_atomic_cmpxchg_entry = ShouldNotCallThisStub();
175 StubRoutines::_atomic_cmpxchg_ptr_entry = ShouldNotCallThisStub();
176 StubRoutines::_atomic_cmpxchg_long_entry = ShouldNotCallThisStub();
177 StubRoutines::_atomic_add_entry = ShouldNotCallThisStub();
178 StubRoutines::_atomic_add_ptr_entry = ShouldNotCallThisStub();
179 StubRoutines::_fence_entry = ShouldNotCallThisStub();
180
181 // amd64 does this here, sparc does it in generate_all()
182 StubRoutines::_handler_for_unsafe_access_entry =
183 ShouldNotCallThisStub();
184 }
185
186 void generate_all() {
187 // Generates all stubs and initializes the entry points
188
189 // These entry points require SharedInfo::stack0 to be set up in
190 // non-core builds and need to be relocatable, so they each
191 // fabricate a RuntimeStub internally.
192 StubRoutines::_throw_AbstractMethodError_entry =
193 ShouldNotCallThisStub();
194
195 StubRoutines::_throw_ArithmeticException_entry =
196 ShouldNotCallThisStub();
197
198 StubRoutines::_throw_NullPointerException_entry =
199 ShouldNotCallThisStub();
200
201 StubRoutines::_throw_NullPointerException_at_call_entry =
202 ShouldNotCallThisStub();
203
204 StubRoutines::_throw_StackOverflowError_entry =
205 ShouldNotCallThisStub();
206
207 // support for verify_oop (must happen after universe_init)
208 StubRoutines::_verify_oop_subroutine_entry =
209 ShouldNotCallThisStub();
210
211 // arraycopy stubs used by compilers
212 generate_arraycopy_stubs();
213 }
214
215 public:
216 StubGenerator(CodeBuffer* code, bool all) : StubCodeGenerator(code) {
217 if (all) {
218 generate_all();
219 } else {
220 generate_initial();
221 }
222 }
223 };
224
225 void StubGenerator_generate(CodeBuffer* code, bool all) {
226 StubGenerator g(code, all);
227 }
228
229 EntryFrame *EntryFrame::build(ZeroStack* stack,
230 const intptr_t* parameters,
231 int parameter_words,
232 JavaCallWrapper* call_wrapper) {
233 if (header_words + parameter_words > stack->available_words()) {
234 Unimplemented();
235 }
236
237 stack->push(0); // next_frame, filled in later
238 intptr_t *fp = stack->sp();
239 assert(fp - stack->sp() == next_frame_off, "should be");
240
241 stack->push(ENTRY_FRAME);
242 assert(fp - stack->sp() == frame_type_off, "should be");
243
244 stack->push((intptr_t) call_wrapper);
245 assert(fp - stack->sp() == call_wrapper_off, "should be");
246
247 for (int i = 0; i < parameter_words; i++)
248 stack->push(parameters[i]);
249
250 return (EntryFrame *) fp;
251 }