Thu, 25 Sep 2008 12:50:51 -0700
6744783: HotSpot segfaults if given -XX options with an empty string argument
Reviewed-by: kamg, kvn
Contributed-by: volker.simonis@gmail.com
1 /*
2 * Copyright 1997-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
25 #include "incls/_precompiled.incl"
26 #include "incls/_stubRoutines.cpp.incl"
29 // Implementation of StubRoutines - for a description
30 // of how to extend it, see the header file.
32 // Class Variables
34 BufferBlob* StubRoutines::_code1 = NULL;
35 BufferBlob* StubRoutines::_code2 = NULL;
37 address StubRoutines::_call_stub_return_address = NULL;
38 address StubRoutines::_call_stub_entry = NULL;
40 address StubRoutines::_catch_exception_entry = NULL;
41 address StubRoutines::_forward_exception_entry = NULL;
42 address StubRoutines::_throw_AbstractMethodError_entry = NULL;
43 address StubRoutines::_throw_IncompatibleClassChangeError_entry = NULL;
44 address StubRoutines::_throw_ArithmeticException_entry = NULL;
45 address StubRoutines::_throw_NullPointerException_entry = NULL;
46 address StubRoutines::_throw_NullPointerException_at_call_entry = NULL;
47 address StubRoutines::_throw_StackOverflowError_entry = NULL;
48 address StubRoutines::_handler_for_unsafe_access_entry = NULL;
49 jint StubRoutines::_verify_oop_count = 0;
50 address StubRoutines::_verify_oop_subroutine_entry = NULL;
51 address StubRoutines::_atomic_xchg_entry = NULL;
52 address StubRoutines::_atomic_xchg_ptr_entry = NULL;
53 address StubRoutines::_atomic_store_entry = NULL;
54 address StubRoutines::_atomic_store_ptr_entry = NULL;
55 address StubRoutines::_atomic_cmpxchg_entry = NULL;
56 address StubRoutines::_atomic_cmpxchg_ptr_entry = NULL;
57 address StubRoutines::_atomic_cmpxchg_long_entry = NULL;
58 address StubRoutines::_atomic_add_entry = NULL;
59 address StubRoutines::_atomic_add_ptr_entry = NULL;
60 address StubRoutines::_fence_entry = NULL;
61 address StubRoutines::_d2i_wrapper = NULL;
62 address StubRoutines::_d2l_wrapper = NULL;
64 jint StubRoutines::_fpu_cntrl_wrd_std = 0;
65 jint StubRoutines::_fpu_cntrl_wrd_24 = 0;
66 jint StubRoutines::_fpu_cntrl_wrd_64 = 0;
67 jint StubRoutines::_fpu_cntrl_wrd_trunc = 0;
68 jint StubRoutines::_mxcsr_std = 0;
69 jint StubRoutines::_fpu_subnormal_bias1[3] = { 0, 0, 0 };
70 jint StubRoutines::_fpu_subnormal_bias2[3] = { 0, 0, 0 };
72 // Compiled code entry points default values
73 // The dafault functions don't have separate disjoint versions.
74 address StubRoutines::_jbyte_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy);
75 address StubRoutines::_jshort_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy);
76 address StubRoutines::_jint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy);
77 address StubRoutines::_jlong_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy);
78 address StubRoutines::_oop_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy);
79 address StubRoutines::_jbyte_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy);
80 address StubRoutines::_jshort_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy);
81 address StubRoutines::_jint_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy);
82 address StubRoutines::_jlong_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy);
83 address StubRoutines::_oop_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy);
85 address StubRoutines::_arrayof_jbyte_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy);
86 address StubRoutines::_arrayof_jshort_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy);
87 address StubRoutines::_arrayof_jint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy);
88 address StubRoutines::_arrayof_jlong_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy);
89 address StubRoutines::_arrayof_oop_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy);
90 address StubRoutines::_arrayof_jbyte_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy);
91 address StubRoutines::_arrayof_jshort_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy);
92 address StubRoutines::_arrayof_jint_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy);
93 address StubRoutines::_arrayof_jlong_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy);
94 address StubRoutines::_arrayof_oop_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy);
96 address StubRoutines::_checkcast_arraycopy = NULL;
97 address StubRoutines::_unsafe_arraycopy = NULL;
98 address StubRoutines::_generic_arraycopy = NULL;
100 // Initialization
101 //
102 // Note: to break cycle with universe initialization, stubs are generated in two phases.
103 // The first one generates stubs needed during universe init (e.g., _handle_must_compile_first_entry).
104 // The second phase includes all other stubs (which may depend on universe being initialized.)
106 extern void StubGenerator_generate(CodeBuffer* code, bool all); // only interface to generators
108 void StubRoutines::initialize1() {
109 if (_code1 == NULL) {
110 ResourceMark rm;
111 TraceTime timer("StubRoutines generation 1", TraceStartupTime);
112 _code1 = BufferBlob::create("StubRoutines (1)", code_size1);
113 if( _code1 == NULL) vm_exit_out_of_memory1(code_size1, "CodeCache: no room for %s", "StubRoutines (1)");
114 CodeBuffer buffer(_code1->instructions_begin(), _code1->instructions_size());
115 StubGenerator_generate(&buffer, false);
116 }
117 }
120 #ifdef ASSERT
121 typedef void (*arraycopy_fn)(address src, address dst, int count);
123 // simple tests of generated arraycopy functions
124 static void test_arraycopy_func(address func, int alignment) {
125 int v = 0xcc;
126 int v2 = 0x11;
127 jlong lbuffer[2];
128 jlong lbuffer2[2];
129 address buffer = (address) lbuffer;
130 address buffer2 = (address) lbuffer2;
131 unsigned int i;
132 for (i = 0; i < sizeof(lbuffer); i++) {
133 buffer[i] = v; buffer2[i] = v2;
134 }
135 // do an aligned copy
136 ((arraycopy_fn)func)(buffer, buffer2, 0);
137 for (i = 0; i < sizeof(lbuffer); i++) {
138 assert(buffer[i] == v && buffer2[i] == v2, "shouldn't have copied anything");
139 }
140 // adjust destination alignment
141 ((arraycopy_fn)func)(buffer, buffer2 + alignment, 0);
142 for (i = 0; i < sizeof(lbuffer); i++) {
143 assert(buffer[i] == v && buffer2[i] == v2, "shouldn't have copied anything");
144 }
145 // adjust source alignment
146 ((arraycopy_fn)func)(buffer + alignment, buffer2, 0);
147 for (i = 0; i < sizeof(lbuffer); i++) {
148 assert(buffer[i] == v && buffer2[i] == v2, "shouldn't have copied anything");
149 }
150 }
151 #endif
154 void StubRoutines::initialize2() {
155 if (_code2 == NULL) {
156 ResourceMark rm;
157 TraceTime timer("StubRoutines generation 2", TraceStartupTime);
158 _code2 = BufferBlob::create("StubRoutines (2)", code_size2);
159 if( _code2 == NULL) vm_exit_out_of_memory1(code_size2, "CodeCache: no room for %s", "StubRoutines (2)");
160 CodeBuffer buffer(_code2->instructions_begin(), _code2->instructions_size());
161 StubGenerator_generate(&buffer, true);
162 }
164 #ifdef ASSERT
166 #define TEST_ARRAYCOPY(type) \
167 test_arraycopy_func( type##_arraycopy(), sizeof(type)); \
168 test_arraycopy_func( type##_disjoint_arraycopy(), sizeof(type)); \
169 test_arraycopy_func(arrayof_##type##_arraycopy(), sizeof(HeapWord)); \
170 test_arraycopy_func(arrayof_##type##_disjoint_arraycopy(), sizeof(HeapWord))
172 // Make sure all the arraycopy stubs properly handle zeros
173 TEST_ARRAYCOPY(jbyte);
174 TEST_ARRAYCOPY(jshort);
175 TEST_ARRAYCOPY(jint);
176 TEST_ARRAYCOPY(jlong);
178 #undef TEST_ARRAYCOPY
180 #endif
181 }
184 void stubRoutines_init1() { StubRoutines::initialize1(); }
185 void stubRoutines_init2() { StubRoutines::initialize2(); }
187 //
188 // Default versions of arraycopy functions
189 //
191 static void gen_arraycopy_barrier(oop* dest, size_t count) {
192 assert(count != 0, "count should be non-zero");
193 BarrierSet* bs = Universe::heap()->barrier_set();
194 assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt");
195 bs->write_ref_array(MemRegion((HeapWord*)dest, (HeapWord*)(dest + count)));
196 }
198 JRT_LEAF(void, StubRoutines::jbyte_copy(jbyte* src, jbyte* dest, size_t count))
199 #ifndef PRODUCT
200 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy
201 #endif // !PRODUCT
202 assert(count != 0, "count should be non-zero");
203 Copy::conjoint_bytes_atomic(src, dest, count);
204 JRT_END
206 JRT_LEAF(void, StubRoutines::jshort_copy(jshort* src, jshort* dest, size_t count))
207 #ifndef PRODUCT
208 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy
209 #endif // !PRODUCT
210 assert(count != 0, "count should be non-zero");
211 Copy::conjoint_jshorts_atomic(src, dest, count);
212 JRT_END
214 JRT_LEAF(void, StubRoutines::jint_copy(jint* src, jint* dest, size_t count))
215 #ifndef PRODUCT
216 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy
217 #endif // !PRODUCT
218 assert(count != 0, "count should be non-zero");
219 Copy::conjoint_jints_atomic(src, dest, count);
220 JRT_END
222 JRT_LEAF(void, StubRoutines::jlong_copy(jlong* src, jlong* dest, size_t count))
223 #ifndef PRODUCT
224 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path long/double array copy
225 #endif // !PRODUCT
226 assert(count != 0, "count should be non-zero");
227 Copy::conjoint_jlongs_atomic(src, dest, count);
228 JRT_END
230 JRT_LEAF(void, StubRoutines::oop_copy(oop* src, oop* dest, size_t count))
231 #ifndef PRODUCT
232 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
233 #endif // !PRODUCT
234 assert(count != 0, "count should be non-zero");
235 Copy::conjoint_oops_atomic(src, dest, count);
236 gen_arraycopy_barrier(dest, count);
237 JRT_END
239 JRT_LEAF(void, StubRoutines::arrayof_jbyte_copy(HeapWord* src, HeapWord* dest, size_t count))
240 #ifndef PRODUCT
241 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy
242 #endif // !PRODUCT
243 assert(count != 0, "count should be non-zero");
244 Copy::arrayof_conjoint_bytes(src, dest, count);
245 JRT_END
247 JRT_LEAF(void, StubRoutines::arrayof_jshort_copy(HeapWord* src, HeapWord* dest, size_t count))
248 #ifndef PRODUCT
249 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy
250 #endif // !PRODUCT
251 assert(count != 0, "count should be non-zero");
252 Copy::arrayof_conjoint_jshorts(src, dest, count);
253 JRT_END
255 JRT_LEAF(void, StubRoutines::arrayof_jint_copy(HeapWord* src, HeapWord* dest, size_t count))
256 #ifndef PRODUCT
257 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy
258 #endif // !PRODUCT
259 assert(count != 0, "count should be non-zero");
260 Copy::arrayof_conjoint_jints(src, dest, count);
261 JRT_END
263 JRT_LEAF(void, StubRoutines::arrayof_jlong_copy(HeapWord* src, HeapWord* dest, size_t count))
264 #ifndef PRODUCT
265 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path int/float array copy
266 #endif // !PRODUCT
267 assert(count != 0, "count should be non-zero");
268 Copy::arrayof_conjoint_jlongs(src, dest, count);
269 JRT_END
271 JRT_LEAF(void, StubRoutines::arrayof_oop_copy(HeapWord* src, HeapWord* dest, size_t count))
272 #ifndef PRODUCT
273 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
274 #endif // !PRODUCT
275 assert(count != 0, "count should be non-zero");
276 Copy::arrayof_conjoint_oops(src, dest, count);
277 gen_arraycopy_barrier((oop *) dest, count);
278 JRT_END