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https://github.com/VectorCamp/vectorscan.git
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77fe1ef6e5
Rather that iterating over NFAAccept structures and testing individual bits in the state structure, iterate over the state vector and index into accept structures. Adds report list support to this path, unified with the report lists used for exception handling.
130 lines
4.5 KiB
C
130 lines
4.5 KiB
C
/*
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* Copyright (c) 2015-2016, Intel Corporation
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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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*
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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 Intel Corporation nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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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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/** \file
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* \brief LimEx NFA: native GPR runtime implementations.
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*/
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//#define DEBUG
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//#define DEBUG_INPUT
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//#define DEBUG_EXCEPTIONS
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#include "limex.h"
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#include "accel.h"
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#include "limex_internal.h"
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#include "nfa_internal.h"
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#include "ue2common.h"
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#include "util/bitutils.h"
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// Common code
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#define STATE_ON_STACK
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#define ESTATE_ON_STACK
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#include "limex_runtime.h"
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// Other implementation code from X-Macro impl.
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#define SIZE 32
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#define STATE_T u32
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#define ENG_STATE_T u32
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#define LOAD_FROM_ENG load_u32
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#include "limex_state_impl.h"
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#define INLINE_ATTR really_inline
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#include "limex_common_impl.h"
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////////////////////////////////////////////////////////////////////////////
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// LimEx NFA implementation code - general purpose registers
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////////////////////////////////////////////////////////////////////////////
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// Process exceptional states
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#define STATE_ON_STACK
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#define ESTATE_ON_STACK
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#define RUN_EXCEPTION_FN_ONLY
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#include "limex_exceptional.h"
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static really_inline
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int processExceptional32(u32 s, u32 estate, UNUSED u32 diffmask, u32 *succ,
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const struct LimExNFA32 *limex,
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const struct NFAException32 *exceptions, u64a offset,
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struct NFAContext32 *ctx, char in_rev, char flags) {
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assert(estate != 0); // guaranteed by calling macro
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if (estate == ctx->cached_estate) {
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DEBUG_PRINTF("using cached succ from previous state\n");
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*succ |= ctx->cached_esucc;
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if (ctx->cached_reports && (flags & CALLBACK_OUTPUT)) {
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DEBUG_PRINTF("firing cached reports from previous state\n");
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if (unlikely(limexRunReports(ctx->cached_reports, ctx->callback,
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ctx->context, offset)
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== MO_HALT_MATCHING)) {
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return PE_RV_HALT; // halt;
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}
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}
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return 0;
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}
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u32 orig_estate = estate; // for caching
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u32 local_succ = 0;
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struct proto_cache new_cache = {0, NULL};
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enum CacheResult cacheable = CACHE_RESULT;
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/* Note that only exception-states that consist of exceptions that _only_
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* set successors (not fire accepts or squash states) are cacheable. */
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do {
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u32 bit = findAndClearLSB_32(&estate);
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u32 idx = rank_in_mask32(limex->exceptionMask, bit);
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const struct NFAException32 *e = &exceptions[idx];
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if (!runException32(e, s, succ, &local_succ, limex, offset, ctx,
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&new_cache, &cacheable, in_rev, flags)) {
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return PE_RV_HALT;
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}
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} while (estate != 0);
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*succ |= local_succ;
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if (cacheable == CACHE_RESULT) {
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ctx->cached_estate = orig_estate;
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ctx->cached_esucc = local_succ;
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ctx->cached_reports = new_cache.reports;
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ctx->cached_br = new_cache.br;
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} else if (cacheable == DO_NOT_CACHE_RESULT_AND_FLUSH_BR_ENTRIES) {
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if (ctx->cached_br) {
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ctx->cached_estate = 0U;
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}
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}
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return 0;
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}
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// 32-bit models.
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#include "limex_runtime_impl.h"
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