233 lines
7.0 KiB
C
233 lines
7.0 KiB
C
/*************************************************
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* Perl-Compatible Regular Expressions *
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*************************************************/
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/* PCRE is a library of functions to support regular expressions whose syntax
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and semantics are as close as possible to those of the Perl 5 language.
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Written by Philip Hazel
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Original API code Copyright (c) 1997-2012 University of Cambridge
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New API code Copyright (c) 2016 University of Cambridge
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-----------------------------------------------------------------------------
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of the University of Cambridge nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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-----------------------------------------------------------------------------
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*/
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#ifndef INCLUDED_FROM_PCRE2_JIT_COMPILE
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#error This file must be included from pcre2_jit_compile.c.
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#endif
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/*************************************************
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* Free JIT read-only data *
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*************************************************/
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void
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PRIV(jit_free_rodata)(void *current, void *allocator_data)
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{
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#ifndef SUPPORT_JIT
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(void)current;
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(void)allocator_data;
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#else /* SUPPORT_JIT */
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void *next;
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SLJIT_UNUSED_ARG(allocator_data);
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while (current != NULL)
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{
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next = *(void**)current;
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SLJIT_FREE(current, allocator_data);
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current = next;
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}
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#endif /* SUPPORT_JIT */
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}
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/*************************************************
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* Free JIT compiled code *
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*************************************************/
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void
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PRIV(jit_free)(void *executable_jit, pcre2_memctl *memctl)
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{
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#ifndef SUPPORT_JIT
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(void)executable_jit;
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(void)memctl;
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#else /* SUPPORT_JIT */
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executable_functions *functions = (executable_functions *)executable_jit;
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void *allocator_data = memctl;
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int i;
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for (i = 0; i < JIT_NUMBER_OF_COMPILE_MODES; i++)
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{
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if (functions->executable_funcs[i] != NULL)
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sljit_free_code(functions->executable_funcs[i], NULL);
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PRIV(jit_free_rodata)(functions->read_only_data_heads[i], allocator_data);
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}
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SLJIT_FREE(functions, allocator_data);
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#endif /* SUPPORT_JIT */
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}
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/*************************************************
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* Free unused JIT memory *
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*************************************************/
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PCRE2_EXP_DEFN void PCRE2_CALL_CONVENTION
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pcre2_jit_free_unused_memory(pcre2_general_context *gcontext)
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{
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#ifndef SUPPORT_JIT
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(void)gcontext; /* Suppress warning */
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#else /* SUPPORT_JIT */
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SLJIT_UNUSED_ARG(gcontext);
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sljit_free_unused_memory_exec();
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#endif /* SUPPORT_JIT */
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}
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/*************************************************
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* Allocate a JIT stack *
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*************************************************/
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PCRE2_EXP_DEFN pcre2_jit_stack * PCRE2_CALL_CONVENTION
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pcre2_jit_stack_create(size_t startsize, size_t maxsize,
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pcre2_general_context *gcontext)
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{
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#ifndef SUPPORT_JIT
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(void)gcontext;
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(void)startsize;
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(void)maxsize;
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return NULL;
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#else /* SUPPORT_JIT */
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pcre2_jit_stack *jit_stack;
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if (startsize == 0 || maxsize == 0 || maxsize > SIZE_MAX - STACK_GROWTH_RATE)
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return NULL;
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if (startsize > maxsize)
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startsize = maxsize;
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startsize = (startsize + STACK_GROWTH_RATE - 1) & ~(STACK_GROWTH_RATE - 1);
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maxsize = (maxsize + STACK_GROWTH_RATE - 1) & ~(STACK_GROWTH_RATE - 1);
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jit_stack = PRIV(memctl_malloc)(sizeof(pcre2_real_jit_stack), (pcre2_memctl *)gcontext);
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if (jit_stack == NULL) return NULL;
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jit_stack->stack = sljit_allocate_stack(startsize, maxsize, &jit_stack->memctl);
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if (jit_stack->stack == NULL)
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{
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jit_stack->memctl.free(jit_stack, jit_stack->memctl.memory_data);
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return NULL;
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}
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return jit_stack;
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#endif
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}
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/*************************************************
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* Assign a JIT stack to a pattern *
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*************************************************/
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PCRE2_EXP_DEFN void PCRE2_CALL_CONVENTION
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pcre2_jit_stack_assign(pcre2_match_context *mcontext, pcre2_jit_callback callback,
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void *callback_data)
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{
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#ifndef SUPPORT_JIT
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(void)mcontext;
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(void)callback;
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(void)callback_data;
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#else /* SUPPORT_JIT */
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if (mcontext == NULL) return;
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mcontext->jit_callback = callback;
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mcontext->jit_callback_data = callback_data;
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#endif /* SUPPORT_JIT */
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}
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/*************************************************
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* Free a JIT stack *
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*************************************************/
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PCRE2_EXP_DEFN void PCRE2_CALL_CONVENTION
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pcre2_jit_stack_free(pcre2_jit_stack *jit_stack)
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{
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#ifndef SUPPORT_JIT
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(void)jit_stack;
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#else /* SUPPORT_JIT */
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if (jit_stack != NULL)
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{
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sljit_free_stack((struct sljit_stack *)(jit_stack->stack), &jit_stack->memctl);
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jit_stack->memctl.free(jit_stack, jit_stack->memctl.memory_data);
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}
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#endif /* SUPPORT_JIT */
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}
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/*************************************************
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* Get target CPU type *
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*************************************************/
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const char*
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PRIV(jit_get_target)(void)
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{
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#ifndef SUPPORT_JIT
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return "JIT is not supported";
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#else /* SUPPORT_JIT */
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return sljit_get_platform_name();
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#endif /* SUPPORT_JIT */
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}
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/*************************************************
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* Get size of JIT code *
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*************************************************/
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size_t
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PRIV(jit_get_size)(void *executable_jit)
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{
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#ifndef SUPPORT_JIT
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(void)executable_jit;
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return 0;
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#else /* SUPPORT_JIT */
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sljit_uw *executable_sizes = ((executable_functions *)executable_jit)->executable_sizes;
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SLJIT_COMPILE_ASSERT(JIT_NUMBER_OF_COMPILE_MODES == 3, number_of_compile_modes_changed);
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return executable_sizes[0] + executable_sizes[1] + executable_sizes[2];
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#endif
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}
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/* End of pcre2_jit_misc.c */
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