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1 : /* src/vm/method.hpp - method functions header
2 :
3 : Copyright (C) 1996-2013
4 : CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
5 :
6 : This file is part of CACAO.
7 :
8 : This program is free software; you can redistribute it and/or
9 : modify it under the terms of the GNU General Public License as
10 : published by the Free Software Foundation; either version 2, or (at
11 : your option) any later version.
12 :
13 : This program is distributed in the hope that it will be useful, but
14 : WITHOUT ANY WARRANTY; without even the implied warranty of
15 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 : General Public License for more details.
17 :
18 : You should have received a copy of the GNU General Public License
19 : along with this program; if not, write to the Free Software
20 : Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 : 02110-1301, USA.
22 :
23 : */
24 :
25 :
26 : #ifndef METHOD_HPP_
27 : #define METHOD_HPP_ 1
28 :
29 : #include "config.h" // for ENABLE_JAVASE, etc
30 :
31 : #include <stdint.h> // for uint16_t, int32_t
32 :
33 : #include "vm/global.hpp" // for java_handle_bytearray_t, etc
34 : #include "vm/references.hpp" // for classref_or_classinfo
35 : #include "vm/types.hpp" // for s4, u2, u1
36 : #include "vm/utf8.hpp" // for Utf8String
37 :
38 : class BreakpointTable;
39 : class Mutex;
40 : struct builtintable_entry;
41 : struct classbuffer;
42 : struct classinfo;
43 : struct codeinfo;
44 : struct lineinfo;
45 : struct localvarinfo;
46 : struct method_assumption;
47 : struct method_worklist;
48 : struct methoddesc;
49 : struct methodinfo;
50 : struct raw_exception_entry;
51 : struct stack_map_t;
52 : struct vftbl_t;
53 :
54 : namespace cacao {
55 : struct ClassBuffer;
56 : struct DescriptorPool;
57 : }
58 :
59 :
60 : #if defined(ENABLE_REPLACEMENT)
61 : // Initial value for the hit countdown field of each method.
62 : #define METHOD_INITIAL_HIT_COUNTDOWN 1000
63 : #endif
64 :
65 :
66 : /* methodinfo *****************************************************************/
67 :
68 : struct methodinfo { /* method structure */
69 : Mutex *mutex; /* we need this in jit's locking */
70 : s4 flags; /* ACC flags */
71 : Utf8String name; /* name of method */
72 : Utf8String descriptor; /* JavaVM descriptor string of method */
73 : #if defined(ENABLE_JAVASE)
74 : Utf8String signature; /* Signature attribute */
75 : stack_map_t *stack_map; /* StackMapTable attribute */
76 : #endif
77 :
78 : methoddesc *parseddesc; /* parsed descriptor */
79 :
80 : classinfo *clazz; /* class, the method belongs to */
81 : s4 vftblindex; /* index of method in virtual function */
82 : /* table (if it is a virtual method) */
83 : s4 maxstack; /* maximum stack depth of method */
84 : s4 maxlocals; /* maximum number of local variables */
85 : s4 jcodelength; /* length of JavaVM code */
86 : u1 *jcode; /* pointer to JavaVM code */
87 :
88 : s4 rawexceptiontablelength; /* exceptiontable length */
89 : raw_exception_entry *rawexceptiontable; /* the exceptiontable */
90 :
91 : u2 thrownexceptionscount; /* number of exceptions attribute */
92 : classref_or_classinfo *thrownexceptions; /* except. a method may throw */
93 :
94 : u2 linenumbercount; /* number of linenumber attributes */
95 : lineinfo *linenumbers; /* array of lineinfo items */
96 :
97 : #if defined(ENABLE_JAVASE) && defined(ENABLE_JVMTI)
98 : uint16_t localvarcount; /* number of local variable attributes */
99 : localvarinfo* localvars; /* array of localvarinfo items */
100 : #endif
101 :
102 : u1 *stubroutine; /* stub for compiling or calling natives */
103 : codeinfo *code; /* current code of this method */
104 :
105 : #if defined(ENABLE_LSRA)
106 : s4 maxlifetimes; /* helper for lsra */
107 : #endif
108 :
109 : methodinfo *overwrites; /* method that is directly overwritten */
110 : method_assumption *assumptions; /* list of assumptions about this method */
111 :
112 : BreakpointTable* breakpoints; /* breakpoints in this method */
113 :
114 : #if defined(ENABLE_REPLACEMENT)
115 : s4 hitcountdown; /* decreased for each hit */
116 : #endif
117 :
118 : #if defined(ENABLE_DEBUG_FILTER)
119 : u1 filtermatches; /* flags indicating which filters the method matches */
120 : #endif
121 :
122 : #if defined(ENABLE_ESCAPE)
123 : u1 *paramescape;
124 : #endif
125 : };
126 :
127 : /* method_assumption ***********************************************************
128 :
129 : This struct is used for registering assumptions about methods.
130 :
131 : *******************************************************************************/
132 :
133 : struct method_assumption {
134 : method_assumption *next;
135 : methodinfo *context;
136 : };
137 :
138 :
139 : /* method_worklist *************************************************************
140 :
141 : List node used for method worklists.
142 :
143 : *******************************************************************************/
144 :
145 : struct method_worklist {
146 : method_worklist *next;
147 : methodinfo *m;
148 : };
149 :
150 :
151 : /* raw_exception_entry ********************************************************/
152 :
153 : /* exception table entry read by the loader */
154 :
155 : struct raw_exception_entry { /* exceptiontable entry in a method */
156 : classref_or_classinfo catchtype; /* catchtype of exc. (0 == catchall) */
157 : u2 startpc; /* start pc of guarded area (inclusive) */
158 : u2 endpc; /* end pc of guarded area (exklusive) */
159 : u2 handlerpc; /* pc of exception handler */
160 : };
161 :
162 :
163 : /* lineinfo *******************************************************************/
164 :
165 : struct lineinfo {
166 : u2 start_pc;
167 : u2 line_number;
168 : };
169 :
170 :
171 : /* localvarinfo ***************************************************************/
172 :
173 : struct localvarinfo {
174 : uint16_t start_pc;
175 : uint16_t length;
176 : Utf8String name;
177 : Utf8String descriptor;
178 : uint16_t index;
179 : };
180 :
181 :
182 : /* global variables ***********************************************************/
183 :
184 : extern methodinfo *method_java_lang_reflect_Method_invoke;
185 :
186 :
187 : /* inline functions ***********************************************************/
188 :
189 0 : inline static bool method_is_builtin(methodinfo* m)
190 : {
191 0 : return m->flags & ACC_METHOD_BUILTIN;
192 : }
193 :
194 :
195 : /* function prototypes ********************************************************/
196 :
197 : void method_init(void);
198 :
199 : bool method_load(cacao::ClassBuffer& cb, methodinfo *m, cacao::DescriptorPool& descpool);
200 : void method_free(methodinfo *m);
201 : bool method_canoverwrite(methodinfo *m, methodinfo *old);
202 :
203 : methodinfo *method_new_builtin(builtintable_entry *bte);
204 :
205 : methodinfo *method_vftbl_lookup(vftbl_t *vftbl, methodinfo* m);
206 :
207 : int32_t method_get_parametercount(methodinfo *m);
208 : java_handle_objectarray_t *method_get_parametertypearray(methodinfo *m);
209 : java_handle_objectarray_t *method_get_exceptionarray(methodinfo *m);
210 : classinfo *method_returntype_get(methodinfo *m);
211 :
212 : void method_add_assumption_monomorphic(methodinfo *m, methodinfo *caller);
213 : void method_break_assumption_monomorphic(methodinfo *m, method_worklist **wl);
214 :
215 : s4 method_count_implementations(methodinfo *m, classinfo *c, methodinfo **found);
216 :
217 : java_handle_bytearray_t *method_get_annotations(methodinfo *m);
218 : java_handle_bytearray_t *method_get_parameterannotations(methodinfo *m);
219 : java_handle_bytearray_t *method_get_annotationdefault(methodinfo *m);
220 :
221 : #if !defined(NDEBUG)
222 : void method_printflags(methodinfo *m);
223 : void method_print(methodinfo *m);
224 : void method_println(methodinfo *m);
225 : void method_methodref_print(constant_FMIref *mr);
226 : void method_methodref_println(constant_FMIref *mr);
227 : #endif
228 :
229 :
230 : namespace cacao {
231 :
232 : // forward declaration
233 : class OStream;
234 :
235 : cacao::OStream& operator<<(cacao::OStream &OS, const struct methodinfo &m);
236 :
237 : } // end namespace cacao
238 :
239 : #endif // METHOD_HPP_
240 :
241 :
242 : /*
243 : * These are local overrides for various environment variables in Emacs.
244 : * Please do not remove this and leave it at the end of the file, where
245 : * Emacs will automagically detect them.
246 : * ---------------------------------------------------------------------
247 : * Local variables:
248 : * mode: c++
249 : * indent-tabs-mode: t
250 : * c-basic-offset: 4
251 : * tab-width: 4
252 : * End:
253 : * vim:noexpandtab:sw=4:ts=4:
254 : */
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