1 /*************************************************
2 * Perl-Compatible Regular Expressions *
3 *************************************************/
4
5 /* PCRE is a library of functions to support regular expressions whose syntax
6 and semantics are as close as possible to those of the Perl 5 language.
7
8 Written by Philip Hazel
9 Original API code Copyright (c) 1997-2012 University of Cambridge
10 New API code Copyright (c) 2016 University of Cambridge
11
12 -----------------------------------------------------------------------------
13 Redistribution and use in source and binary forms, with or without
14 modification, are permitted provided that the following conditions are met:
15
16 * Redistributions of source code must retain the above copyright notice,
17 this list of conditions and the following disclaimer.
18
19 * Redistributions in binary form must reproduce the above copyright
20 notice, this list of conditions and the following disclaimer in the
21 documentation and/or other materials provided with the distribution.
22
23 * Neither the name of the University of Cambridge nor the names of its
24 contributors may be used to endorse or promote products derived from
25 this software without specific prior written permission.
26
27 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
28 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
31 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37 POSSIBILITY OF SUCH DAMAGE.
38 -----------------------------------------------------------------------------
39 */
40
41
42 #ifndef INCLUDED_FROM_PCRE2_JIT_COMPILE
43 #error This file must be included from pcre2_jit_compile.c.
44 #endif
45
46
47
48 /*************************************************
49 * Free JIT read-only data *
50 *************************************************/
51
52 void
PRIV(jit_free_rodata)53 PRIV(jit_free_rodata)(void *current, void *allocator_data)
54 {
55 #ifndef SUPPORT_JIT
56 (void)current;
57 (void)allocator_data;
58 #else /* SUPPORT_JIT */
59 void *next;
60
61 SLJIT_UNUSED_ARG(allocator_data);
62
63 while (current != NULL)
64 {
65 next = *(void**)current;
66 SLJIT_FREE(current, allocator_data);
67 current = next;
68 }
69
70 #endif /* SUPPORT_JIT */
71 }
72
73 /*************************************************
74 * Free JIT compiled code *
75 *************************************************/
76
77 void
PRIV(jit_free)78 PRIV(jit_free)(void *executable_jit, pcre2_memctl *memctl)
79 {
80 #ifndef SUPPORT_JIT
81 (void)executable_jit;
82 (void)memctl;
83 #else /* SUPPORT_JIT */
84
85 executable_functions *functions = (executable_functions *)executable_jit;
86 void *allocator_data = memctl;
87 int i;
88
89 for (i = 0; i < JIT_NUMBER_OF_COMPILE_MODES; i++)
90 {
91 if (functions->executable_funcs[i] != NULL)
92 sljit_free_code(functions->executable_funcs[i], NULL);
93 PRIV(jit_free_rodata)(functions->read_only_data_heads[i], allocator_data);
94 }
95
96 SLJIT_FREE(functions, allocator_data);
97
98 #endif /* SUPPORT_JIT */
99 }
100
101
102 /*************************************************
103 * Free unused JIT memory *
104 *************************************************/
105
106 PCRE2_EXP_DEFN void PCRE2_CALL_CONVENTION
pcre2_jit_free_unused_memory(pcre2_general_context * gcontext)107 pcre2_jit_free_unused_memory(pcre2_general_context *gcontext)
108 {
109 #ifndef SUPPORT_JIT
110 (void)gcontext; /* Suppress warning */
111 #else /* SUPPORT_JIT */
112 SLJIT_UNUSED_ARG(gcontext);
113 sljit_free_unused_memory_exec();
114 #endif /* SUPPORT_JIT */
115 }
116
117
118
119 /*************************************************
120 * Allocate a JIT stack *
121 *************************************************/
122
123 PCRE2_EXP_DEFN pcre2_jit_stack * PCRE2_CALL_CONVENTION
pcre2_jit_stack_create(size_t startsize,size_t maxsize,pcre2_general_context * gcontext)124 pcre2_jit_stack_create(size_t startsize, size_t maxsize,
125 pcre2_general_context *gcontext)
126 {
127 #ifndef SUPPORT_JIT
128
129 (void)gcontext;
130 (void)startsize;
131 (void)maxsize;
132 return NULL;
133
134 #else /* SUPPORT_JIT */
135
136 pcre2_jit_stack *jit_stack;
137
138 if (startsize < 1 || maxsize < 1)
139 return NULL;
140 if (startsize > maxsize)
141 startsize = maxsize;
142 startsize = (startsize + STACK_GROWTH_RATE - 1) & ~(STACK_GROWTH_RATE - 1);
143 maxsize = (maxsize + STACK_GROWTH_RATE - 1) & ~(STACK_GROWTH_RATE - 1);
144
145 jit_stack = PRIV(memctl_malloc)(sizeof(pcre2_real_jit_stack), (pcre2_memctl *)gcontext);
146 if (jit_stack == NULL) return NULL;
147 jit_stack->stack = sljit_allocate_stack(startsize, maxsize, &jit_stack->memctl);
148 if (jit_stack->stack == NULL)
149 {
150 jit_stack->memctl.free(jit_stack, jit_stack->memctl.memory_data);
151 return NULL;
152 }
153 return jit_stack;
154
155 #endif
156 }
157
158
159 /*************************************************
160 * Assign a JIT stack to a pattern *
161 *************************************************/
162
163 PCRE2_EXP_DEFN void PCRE2_CALL_CONVENTION
pcre2_jit_stack_assign(pcre2_match_context * mcontext,pcre2_jit_callback callback,void * callback_data)164 pcre2_jit_stack_assign(pcre2_match_context *mcontext, pcre2_jit_callback callback,
165 void *callback_data)
166 {
167 #ifndef SUPPORT_JIT
168 (void)mcontext;
169 (void)callback;
170 (void)callback_data;
171 #else /* SUPPORT_JIT */
172
173 if (mcontext == NULL) return;
174 mcontext->jit_callback = callback;
175 mcontext->jit_callback_data = callback_data;
176
177 #endif /* SUPPORT_JIT */
178 }
179
180
181 /*************************************************
182 * Free a JIT stack *
183 *************************************************/
184
185 PCRE2_EXP_DEFN void PCRE2_CALL_CONVENTION
pcre2_jit_stack_free(pcre2_jit_stack * jit_stack)186 pcre2_jit_stack_free(pcre2_jit_stack *jit_stack)
187 {
188 #ifndef SUPPORT_JIT
189 (void)jit_stack;
190 #else /* SUPPORT_JIT */
191 if (jit_stack != NULL)
192 {
193 sljit_free_stack((struct sljit_stack *)(jit_stack->stack), &jit_stack->memctl);
194 jit_stack->memctl.free(jit_stack, jit_stack->memctl.memory_data);
195 }
196 #endif /* SUPPORT_JIT */
197 }
198
199
200 /*************************************************
201 * Get target CPU type *
202 *************************************************/
203
204 const char*
PRIV(jit_get_target)205 PRIV(jit_get_target)(void)
206 {
207 #ifndef SUPPORT_JIT
208 return "JIT is not supported";
209 #else /* SUPPORT_JIT */
210 return sljit_get_platform_name();
211 #endif /* SUPPORT_JIT */
212 }
213
214
215 /*************************************************
216 * Get size of JIT code *
217 *************************************************/
218
219 size_t
PRIV(jit_get_size)220 PRIV(jit_get_size)(void *executable_jit)
221 {
222 #ifndef SUPPORT_JIT
223 (void)executable_jit;
224 return 0;
225 #else /* SUPPORT_JIT */
226 sljit_uw *executable_sizes = ((executable_functions *)executable_jit)->executable_sizes;
227 SLJIT_COMPILE_ASSERT(JIT_NUMBER_OF_COMPILE_MODES == 3, number_of_compile_modes_changed);
228 return executable_sizes[0] + executable_sizes[1] + executable_sizes[2];
229 #endif
230 }
231
232 /* End of pcre2_jit_misc.c */
233