1 /*
2 * Copyright 2003-2007 Sun Microsystems, Inc. All Rights Reserved.
3 * Copyright 2007, 2008, 2010 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 zero_stack_size = stack->suggest_size(thread);
55 stack->setup(alloca(zero_stack_size), zero_stack_size);
56 stack_needs_teardown = true;
57 }
58
59 // Allocate and initialize our frame
60 EntryFrame *frame =
61 EntryFrame::build(parameters, parameter_words, call_wrapper, THREAD);
62
63 if (!HAS_PENDING_EXCEPTION) {
64 // Push the frame
65 thread->push_zero_frame(frame);
66
67 // Make the call
68 Interpreter::invoke_method(method, entry_point, THREAD);
69
70 // Store the result
71 if (!HAS_PENDING_EXCEPTION) {
72 switch (result_type) {
73 case T_INT:
74 *(jint *) result = *(jint *) stack->sp();
75 break;
76 case T_LONG:
77 *(jlong *) result = *(jlong *) stack->sp();
78 break;
79 case T_FLOAT:
80 *(jfloat *) result = *(jfloat *) stack->sp();
81 break;
82 case T_DOUBLE:
83 *(jdouble *) result = *(jdouble *) stack->sp();
84 break;
85 case T_OBJECT:
86 *(oop *) result = *(oop *) stack->sp();
87 break;
88 default:
89 ShouldNotReachHere();
90 }
91 }
92
93 // Unwind the frame
94 thread->pop_zero_frame();
95 }
96
97 // Tear down the stack if necessary
98 if (stack_needs_teardown)
99 stack->teardown();
100 }
101
102 // These stubs get called from some dumb test routine.
103 // I'll write them properly when they're called from
104 // something that's actually doing something.
105 static void fake_arraycopy_stub(address src, address dst, int count) {
106 assert(count == 0, "huh?");
107 }
108
109 void generate_arraycopy_stubs() {
110 // Call the conjoint generation methods immediately after
111 // the disjoint ones so that short branches from the former
112 // to the latter can be generated.
113 StubRoutines::_jbyte_disjoint_arraycopy = (address) fake_arraycopy_stub;
114 StubRoutines::_jbyte_arraycopy = (address) fake_arraycopy_stub;
115
116 StubRoutines::_jshort_disjoint_arraycopy = (address) fake_arraycopy_stub;
117 StubRoutines::_jshort_arraycopy = (address) fake_arraycopy_stub;
118
119 StubRoutines::_jint_disjoint_arraycopy = (address) fake_arraycopy_stub;
120 StubRoutines::_jint_arraycopy = (address) fake_arraycopy_stub;
121
122 StubRoutines::_jlong_disjoint_arraycopy = (address) fake_arraycopy_stub;
123 StubRoutines::_jlong_arraycopy = (address) fake_arraycopy_stub;
124
125 StubRoutines::_oop_disjoint_arraycopy = ShouldNotCallThisStub();
126 StubRoutines::_oop_arraycopy = ShouldNotCallThisStub();
127
128 StubRoutines::_checkcast_arraycopy = ShouldNotCallThisStub();
129 StubRoutines::_unsafe_arraycopy = ShouldNotCallThisStub();
130 StubRoutines::_generic_arraycopy = ShouldNotCallThisStub();
131
132 // We don't generate specialized code for HeapWord-aligned source
133 // arrays, so just use the code we've already generated
134 StubRoutines::_arrayof_jbyte_disjoint_arraycopy =
135 StubRoutines::_jbyte_disjoint_arraycopy;
136 StubRoutines::_arrayof_jbyte_arraycopy =
137 StubRoutines::_jbyte_arraycopy;
138
139 StubRoutines::_arrayof_jshort_disjoint_arraycopy =
140 StubRoutines::_jshort_disjoint_arraycopy;
141 StubRoutines::_arrayof_jshort_arraycopy =
142 StubRoutines::_jshort_arraycopy;
143
144 StubRoutines::_arrayof_jint_disjoint_arraycopy =
145 StubRoutines::_jint_disjoint_arraycopy;
146 StubRoutines::_arrayof_jint_arraycopy =
147 StubRoutines::_jint_arraycopy;
148
149 StubRoutines::_arrayof_jlong_disjoint_arraycopy =
150 StubRoutines::_jlong_disjoint_arraycopy;
151 StubRoutines::_arrayof_jlong_arraycopy =
152 StubRoutines::_jlong_arraycopy;
153
154 StubRoutines::_arrayof_oop_disjoint_arraycopy =
155 StubRoutines::_oop_disjoint_arraycopy;
156 StubRoutines::_arrayof_oop_arraycopy =
157 StubRoutines::_oop_arraycopy;
158 }
159
160 void generate_initial() {
161 // Generates all stubs and initializes the entry points
162
163 // entry points that exist in all platforms Note: This is code
164 // that could be shared among different platforms - however the
165 // benefit seems to be smaller than the disadvantage of having a
166 // much more complicated generator structure. See also comment in
167 // stubRoutines.hpp.
168
169 StubRoutines::_forward_exception_entry = ShouldNotCallThisStub();
170 StubRoutines::_call_stub_entry = (address) call_stub;
171 StubRoutines::_catch_exception_entry = ShouldNotCallThisStub();
172
173 // atomic calls
174 StubRoutines::_atomic_xchg_entry = ShouldNotCallThisStub();
175 StubRoutines::_atomic_xchg_ptr_entry = ShouldNotCallThisStub();
176 StubRoutines::_atomic_cmpxchg_entry = ShouldNotCallThisStub();
177 StubRoutines::_atomic_cmpxchg_ptr_entry = ShouldNotCallThisStub();
178 StubRoutines::_atomic_cmpxchg_long_entry = ShouldNotCallThisStub();
179 StubRoutines::_atomic_add_entry = ShouldNotCallThisStub();
180 StubRoutines::_atomic_add_ptr_entry = ShouldNotCallThisStub();
181 StubRoutines::_fence_entry = ShouldNotCallThisStub();
182
183 // amd64 does this here, sparc does it in generate_all()
184 StubRoutines::_handler_for_unsafe_access_entry =
185 ShouldNotCallThisStub();
186 }
187
188 void generate_all() {
189 // Generates all stubs and initializes the entry points
190
191 // These entry points require SharedInfo::stack0 to be set up in
192 // non-core builds and need to be relocatable, so they each
193 // fabricate a RuntimeStub internally.
194 StubRoutines::_throw_AbstractMethodError_entry =
195 ShouldNotCallThisStub();
196
197 StubRoutines::_throw_ArithmeticException_entry =
198 ShouldNotCallThisStub();
199
200 StubRoutines::_throw_NullPointerException_entry =
201 ShouldNotCallThisStub();
202
203 StubRoutines::_throw_NullPointerException_at_call_entry =
204 ShouldNotCallThisStub();
205
206 StubRoutines::_throw_StackOverflowError_entry =
207 ShouldNotCallThisStub();
208
209 // support for verify_oop (must happen after universe_init)
210 StubRoutines::_verify_oop_subroutine_entry =
211 ShouldNotCallThisStub();
212
213 // arraycopy stubs used by compilers
214 generate_arraycopy_stubs();
215 }
216
217 public:
218 StubGenerator(CodeBuffer* code, bool all) : StubCodeGenerator(code) {
219 if (all) {
220 generate_all();
221 } else {
222 generate_initial();
223 }
224 }
225 };
226
227 void StubGenerator_generate(CodeBuffer* code, bool all) {
228 StubGenerator g(code, all);
229 }
230
231 EntryFrame *EntryFrame::build(const intptr_t* parameters,
232 int parameter_words,
233 JavaCallWrapper* call_wrapper,
234 TRAPS) {
235
236 ZeroStack *stack = ((JavaThread *) THREAD)->zero_stack();
237 stack->overflow_check(header_words + parameter_words, CHECK_NULL);
238
239 stack->push(0); // next_frame, filled in later
240 intptr_t *fp = stack->sp();
241 assert(fp - stack->sp() == next_frame_off, "should be");
242
243 stack->push(ENTRY_FRAME);
244 assert(fp - stack->sp() == frame_type_off, "should be");
245
246 stack->push((intptr_t) call_wrapper);
247 assert(fp - stack->sp() == call_wrapper_off, "should be");
248
249 for (int i = 0; i < parameter_words; i++)
250 stack->push(parameters[i]);
251
252 return (EntryFrame *) fp;
253 }