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 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 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]); 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 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 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 return jit_stack; 149 150 #endif 151 } 152 153 154 /************************************************* 155 * Assign a JIT stack to a pattern * 156 *************************************************/ 157 158 PCRE2_EXP_DEFN void PCRE2_CALL_CONVENTION 159 pcre2_jit_stack_assign(pcre2_match_context *mcontext, pcre2_jit_callback callback, 160 void *callback_data) 161 { 162 #ifndef SUPPORT_JIT 163 (void)mcontext; 164 (void)callback; 165 (void)callback_data; 166 #else /* SUPPORT_JIT */ 167 168 if (mcontext == NULL) return; 169 mcontext->jit_callback = callback; 170 mcontext->jit_callback_data = callback_data; 171 172 #endif /* SUPPORT_JIT */ 173 } 174 175 176 /************************************************* 177 * Free a JIT stack * 178 *************************************************/ 179 180 PCRE2_EXP_DEFN void PCRE2_CALL_CONVENTION 181 pcre2_jit_stack_free(pcre2_jit_stack *jit_stack) 182 { 183 #ifndef SUPPORT_JIT 184 (void)jit_stack; 185 #else /* SUPPORT_JIT */ 186 if (jit_stack != NULL) 187 { 188 sljit_free_stack((struct sljit_stack *)(jit_stack->stack), &jit_stack->memctl); 189 jit_stack->memctl.free(jit_stack, jit_stack->memctl.memory_data); 190 } 191 #endif /* SUPPORT_JIT */ 192 } 193 194 195 /************************************************* 196 * Get target CPU type * 197 *************************************************/ 198 199 const char* 200 PRIV(jit_get_target)(void) 201 { 202 #ifndef SUPPORT_JIT 203 return "JIT is not supported"; 204 #else /* SUPPORT_JIT */ 205 return sljit_get_platform_name(); 206 #endif /* SUPPORT_JIT */ 207 } 208 209 210 /************************************************* 211 * Get size of JIT code * 212 *************************************************/ 213 214 size_t 215 PRIV(jit_get_size)(void *executable_jit) 216 { 217 #ifndef SUPPORT_JIT 218 (void)executable_jit; 219 return 0; 220 #else /* SUPPORT_JIT */ 221 sljit_uw *executable_sizes = ((executable_functions *)executable_jit)->executable_sizes; 222 SLJIT_COMPILE_ASSERT(JIT_NUMBER_OF_COMPILE_MODES == 3, number_of_compile_modes_changed); 223 return executable_sizes[0] + executable_sizes[1] + executable_sizes[2]; 224 #endif 225 } 226 227 /* End of pcre2_jit_misc.c */ 228
