Janis Danisevskis | 112c9cc | 2016-03-31 13:35:25 +0100 | [diff] [blame] | 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) |
Elliott Hughes | 3435c42 | 2020-12-04 13:18:28 -0800 | [diff] [blame] | 92 | sljit_free_code(functions->executable_funcs[i], NULL); |
Janis Danisevskis | 112c9cc | 2016-03-31 13:35:25 +0100 | [diff] [blame] | 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 | |
Elliott Hughes | 4e19c8e | 2022-04-15 15:11:02 -0700 | [diff] [blame] | 138 | if (startsize == 0 || maxsize == 0 || maxsize > SIZE_MAX - STACK_GROWTH_RATE) |
Janis Danisevskis | 112c9cc | 2016-03-31 13:35:25 +0100 | [diff] [blame] | 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); |
Elliott Hughes | 2dbd7d2 | 2020-06-03 14:32:37 -0700 | [diff] [blame] | 148 | if (jit_stack->stack == NULL) |
| 149 | { |
| 150 | jit_stack->memctl.free(jit_stack, jit_stack->memctl.memory_data); |
| 151 | return NULL; |
| 152 | } |
Janis Danisevskis | 112c9cc | 2016-03-31 13:35:25 +0100 | [diff] [blame] | 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 |
| 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 |
| 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* |
| 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 |
| 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 */ |