author | jrose |
Sun, 23 May 2010 01:38:26 -0700 | |
changeset 5688 | 9052dc91ea67 |
parent 4564 | 55dfb20908d0 |
child 5697 | 0cf7190475ee |
permissions | -rw-r--r-- |
1 | 1 |
/* |
5688 | 2 |
* Copyright 1997-2010 Sun Microsystems, Inc. All Rights Reserved. |
1 | 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 |
*/ |
|
24 |
||
25 |
#include "incls/_precompiled.incl" |
|
26 |
#include "incls/_bytecode.cpp.incl" |
|
27 |
||
28 |
// Implementation of Bytecode |
|
29 |
||
5688 | 30 |
bool Bytecode::check_must_rewrite(Bytecodes::Code code) const { |
31 |
assert(Bytecodes::can_rewrite(code), "post-check only"); |
|
1 | 32 |
|
33 |
// Some codes are conditionally rewriting. Look closely at them. |
|
5688 | 34 |
switch (code) { |
1 | 35 |
case Bytecodes::_aload_0: |
36 |
// Even if RewriteFrequentPairs is turned on, |
|
37 |
// the _aload_0 code might delay its rewrite until |
|
38 |
// a following _getfield rewrites itself. |
|
39 |
return false; |
|
40 |
||
41 |
case Bytecodes::_lookupswitch: |
|
42 |
return false; // the rewrite is not done by the interpreter |
|
43 |
||
44 |
case Bytecodes::_new: |
|
45 |
// (Could actually look at the class here, but the profit would be small.) |
|
46 |
return false; // the rewrite is not always done |
|
47 |
} |
|
48 |
||
49 |
// No other special cases. |
|
50 |
return true; |
|
51 |
} |
|
52 |
||
53 |
||
5688 | 54 |
#ifdef ASSERT |
55 |
||
56 |
void Bytecode::assert_same_format_as(Bytecodes::Code testbc, bool is_wide) const { |
|
57 |
Bytecodes::Code thisbc = Bytecodes::cast(byte_at(0)); |
|
58 |
if (thisbc == Bytecodes::_breakpoint) return; // let the assertion fail silently |
|
59 |
if (is_wide) { |
|
60 |
assert(thisbc == Bytecodes::_wide, "expected a wide instruction"); |
|
61 |
thisbc = Bytecodes::cast(byte_at(1)); |
|
62 |
if (thisbc == Bytecodes::_breakpoint) return; |
|
63 |
} |
|
64 |
int thisflags = Bytecodes::flags(testbc, is_wide) & Bytecodes::_all_fmt_bits; |
|
65 |
int testflags = Bytecodes::flags(thisbc, is_wide) & Bytecodes::_all_fmt_bits; |
|
66 |
if (thisflags != testflags) |
|
67 |
tty->print_cr("assert_same_format_as(%d) failed on bc=%d%s; %d != %d", |
|
68 |
(int)testbc, (int)thisbc, (is_wide?"/wide":""), testflags, thisflags); |
|
69 |
assert(thisflags == testflags, "expected format"); |
|
70 |
} |
|
71 |
||
72 |
void Bytecode::assert_index_size(int size, Bytecodes::Code bc, bool is_wide) { |
|
73 |
int have_fmt = (Bytecodes::flags(bc, is_wide) |
|
74 |
& (Bytecodes::_fmt_has_u2 | Bytecodes::_fmt_has_u4 | |
|
75 |
Bytecodes::_fmt_not_simple | |
|
76 |
// Not an offset field: |
|
77 |
Bytecodes::_fmt_has_o)); |
|
78 |
int need_fmt = -1; |
|
79 |
switch (size) { |
|
80 |
case 1: need_fmt = 0; break; |
|
81 |
case 2: need_fmt = Bytecodes::_fmt_has_u2; break; |
|
82 |
case 4: need_fmt = Bytecodes::_fmt_has_u4; break; |
|
83 |
} |
|
84 |
if (is_wide) need_fmt |= Bytecodes::_fmt_not_simple; |
|
85 |
if (have_fmt != need_fmt) { |
|
86 |
tty->print_cr("assert_index_size %d: bc=%d%s %d != %d", size, bc, (is_wide?"/wide":""), have_fmt, need_fmt); |
|
87 |
assert(have_fmt == need_fmt, "assert_index_size"); |
|
88 |
} |
|
89 |
} |
|
90 |
||
91 |
void Bytecode::assert_offset_size(int size, Bytecodes::Code bc, bool is_wide) { |
|
92 |
int have_fmt = Bytecodes::flags(bc, is_wide) & Bytecodes::_all_fmt_bits; |
|
93 |
int need_fmt = -1; |
|
94 |
switch (size) { |
|
95 |
case 2: need_fmt = Bytecodes::_fmt_bo2; break; |
|
96 |
case 4: need_fmt = Bytecodes::_fmt_bo4; break; |
|
97 |
} |
|
98 |
if (is_wide) need_fmt |= Bytecodes::_fmt_not_simple; |
|
99 |
if (have_fmt != need_fmt) { |
|
100 |
tty->print_cr("assert_offset_size %d: bc=%d%s %d != %d", size, bc, (is_wide?"/wide":""), have_fmt, need_fmt); |
|
101 |
assert(have_fmt == need_fmt, "assert_offset_size"); |
|
102 |
} |
|
103 |
} |
|
104 |
||
105 |
void Bytecode::assert_constant_size(int size, int where, Bytecodes::Code bc, bool is_wide) { |
|
106 |
int have_fmt = Bytecodes::flags(bc, is_wide) & (Bytecodes::_all_fmt_bits |
|
107 |
// Ignore any 'i' field (for iinc): |
|
108 |
& ~Bytecodes::_fmt_has_i); |
|
109 |
int need_fmt = -1; |
|
110 |
switch (size) { |
|
111 |
case 1: need_fmt = Bytecodes::_fmt_bc; break; |
|
112 |
case 2: need_fmt = Bytecodes::_fmt_bc | Bytecodes::_fmt_has_u2; break; |
|
113 |
} |
|
114 |
if (is_wide) need_fmt |= Bytecodes::_fmt_not_simple; |
|
115 |
int length = is_wide ? Bytecodes::wide_length_for(bc) : Bytecodes::length_for(bc); |
|
116 |
if (have_fmt != need_fmt || where + size != length) { |
|
117 |
tty->print_cr("assert_constant_size %d @%d: bc=%d%s %d != %d", size, where, bc, (is_wide?"/wide":""), have_fmt, need_fmt); |
|
118 |
} |
|
119 |
assert(have_fmt == need_fmt, "assert_constant_size"); |
|
120 |
assert(where + size == length, "assert_constant_size oob"); |
|
121 |
} |
|
122 |
||
123 |
void Bytecode::assert_native_index(Bytecodes::Code bc, bool is_wide) { |
|
124 |
assert((Bytecodes::flags(bc, is_wide) & Bytecodes::_fmt_has_nbo) != 0, "native index"); |
|
125 |
} |
|
126 |
||
127 |
#endif //ASSERT |
|
1 | 128 |
|
129 |
// Implementation of Bytecode_tableupswitch |
|
130 |
||
131 |
int Bytecode_tableswitch::dest_offset_at(int i) const { |
|
5688 | 132 |
return get_Java_u4_at(aligned_offset(1 + (3 + i)*jintSize)); |
1 | 133 |
} |
134 |
||
135 |
||
136 |
// Implementation of Bytecode_invoke |
|
137 |
||
138 |
void Bytecode_invoke::verify() const { |
|
139 |
Bytecodes::Code bc = adjusted_invoke_code(); |
|
140 |
assert(is_valid(), "check invoke"); |
|
5688 | 141 |
assert(method()->constants()->cache() != NULL, "do not call this from verifier or rewriter"); |
1 | 142 |
} |
143 |
||
144 |
||
145 |
symbolOop Bytecode_invoke::signature() const { |
|
146 |
constantPoolOop constants = method()->constants(); |
|
147 |
return constants->signature_ref_at(index()); |
|
148 |
} |
|
149 |
||
150 |
||
151 |
symbolOop Bytecode_invoke::name() const { |
|
152 |
constantPoolOop constants = method()->constants(); |
|
153 |
return constants->name_ref_at(index()); |
|
154 |
} |
|
155 |
||
156 |
||
157 |
BasicType Bytecode_invoke::result_type(Thread *thread) const { |
|
158 |
symbolHandle sh(thread, signature()); |
|
159 |
ResultTypeFinder rts(sh); |
|
160 |
rts.iterate(); |
|
161 |
return rts.type(); |
|
162 |
} |
|
163 |
||
164 |
||
165 |
methodHandle Bytecode_invoke::static_target(TRAPS) { |
|
166 |
methodHandle m; |
|
167 |
KlassHandle resolved_klass; |
|
168 |
constantPoolHandle constants(THREAD, _method->constants()); |
|
169 |
||
4564
55dfb20908d0
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
3261
diff
changeset
|
170 |
if (adjusted_invoke_code() == Bytecodes::_invokedynamic) { |
55dfb20908d0
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
3261
diff
changeset
|
171 |
LinkResolver::resolve_dynamic_method(m, resolved_klass, constants, index(), CHECK_(methodHandle())); |
55dfb20908d0
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
3261
diff
changeset
|
172 |
} else if (adjusted_invoke_code() != Bytecodes::_invokeinterface) { |
1 | 173 |
LinkResolver::resolve_method(m, resolved_klass, constants, index(), CHECK_(methodHandle())); |
174 |
} else { |
|
175 |
LinkResolver::resolve_interface_method(m, resolved_klass, constants, index(), CHECK_(methodHandle())); |
|
176 |
} |
|
177 |
return m; |
|
178 |
} |
|
179 |
||
180 |
||
181 |
int Bytecode_invoke::index() const { |
|
2570
ecc7862946d4
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
1
diff
changeset
|
182 |
// Note: Rewriter::rewrite changes the Java_u2 of an invokedynamic to a native_u4, |
ecc7862946d4
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
1
diff
changeset
|
183 |
// at the same time it allocates per-call-site CP cache entries. |
5688 | 184 |
Bytecodes::Code stdc = Bytecodes::java_code(code()); |
185 |
Bytecode* invoke = Bytecode_at(bcp()); |
|
186 |
if (invoke->has_index_u4(stdc)) |
|
187 |
return invoke->get_index_u4(stdc); |
|
2570
ecc7862946d4
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
1
diff
changeset
|
188 |
else |
5688 | 189 |
return invoke->get_index_u2_cpcache(stdc); |
1 | 190 |
} |
191 |
||
192 |
||
193 |
// Implementation of Bytecode_field |
|
194 |
||
195 |
void Bytecode_field::verify() const { |
|
196 |
Bytecodes::Code stdc = Bytecodes::java_code(code()); |
|
197 |
assert(stdc == Bytecodes::_putstatic || stdc == Bytecodes::_getstatic || |
|
198 |
stdc == Bytecodes::_putfield || stdc == Bytecodes::_getfield, "check field"); |
|
199 |
} |
|
200 |
||
201 |
||
202 |
bool Bytecode_field::is_static() const { |
|
203 |
Bytecodes::Code stdc = Bytecodes::java_code(code()); |
|
204 |
return stdc == Bytecodes::_putstatic || stdc == Bytecodes::_getstatic; |
|
205 |
} |
|
206 |
||
207 |
||
208 |
int Bytecode_field::index() const { |
|
5688 | 209 |
Bytecode* invoke = Bytecode_at(bcp()); |
210 |
return invoke->get_index_u2_cpcache(Bytecodes::_getfield); |
|
1 | 211 |
} |
212 |
||
213 |
||
214 |
// Implementation of Bytecodes loac constant |
|
215 |
||
216 |
int Bytecode_loadconstant::index() const { |
|
217 |
Bytecodes::Code stdc = Bytecodes::java_code(code()); |
|
5688 | 218 |
return stdc == Bytecodes::_ldc ? get_index_u1(stdc) : get_index_u2(stdc); |
1 | 219 |
} |
220 |
||
221 |
//------------------------------------------------------------------------------ |
|
222 |
// Non-product code |
|
223 |
||
224 |
#ifndef PRODUCT |
|
225 |
||
226 |
void Bytecode_lookupswitch::verify() const { |
|
227 |
switch (Bytecodes::java_code(code())) { |
|
228 |
case Bytecodes::_lookupswitch: |
|
229 |
{ int i = number_of_pairs() - 1; |
|
230 |
while (i-- > 0) { |
|
231 |
assert(pair_at(i)->match() < pair_at(i+1)->match(), "unsorted table entries"); |
|
232 |
} |
|
233 |
} |
|
234 |
break; |
|
235 |
default: |
|
236 |
fatal("not a lookupswitch bytecode"); |
|
237 |
} |
|
238 |
} |
|
239 |
||
240 |
void Bytecode_tableswitch::verify() const { |
|
241 |
switch (Bytecodes::java_code(code())) { |
|
242 |
case Bytecodes::_tableswitch: |
|
243 |
{ int lo = low_key(); |
|
244 |
int hi = high_key(); |
|
245 |
assert (hi >= lo, "incorrect hi/lo values in tableswitch"); |
|
246 |
int i = hi - lo - 1 ; |
|
247 |
while (i-- > 0) { |
|
248 |
// no special check needed |
|
249 |
} |
|
250 |
} |
|
251 |
break; |
|
252 |
default: |
|
253 |
fatal("not a tableswitch bytecode"); |
|
254 |
} |
|
255 |
} |
|
256 |
||
257 |
#endif |