mirror of
https://github.com/VectorCamp/vectorscan.git
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060defe6c4
Move report preconditions (bounds, exhaustion, etc) into program instructions and use a more direct path to the user match callback than the adaptor functions. Report handling has been moved to new file src/report.h. Reporting from EOD now uses the same instructions as normal report handling, rather than its own. Jump target tracking in rose_build_bytecode.cpp has been cleaned up.
532 lines
18 KiB
C
532 lines
18 KiB
C
/*
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* Copyright (c) 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 Runtime functions to do with reports, inlined into callers.
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*/
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#ifndef REPORT_H
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#define REPORT_H
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#include "hs_internal.h"
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#include "hs_runtime.h"
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#include "scratch.h"
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#include "ue2common.h"
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#include "nfa/callback.h"
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#include "nfa/nfa_internal.h"
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#include "rose/runtime.h"
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#include "som/som_runtime.h"
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#include "util/exhaust.h"
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#include "util/fatbit.h"
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#include "util/internal_report.h"
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static really_inline
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int satisfiesMinLength(u64a min_len, u64a from_offset,
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u64a to_offset) {
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assert(min_len);
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if (from_offset == HS_OFFSET_PAST_HORIZON) {
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DEBUG_PRINTF("SOM beyond horizon\n");
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return 1;
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}
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DEBUG_PRINTF("match len=%llu, min len=%llu\n", to_offset - from_offset,
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min_len);
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return to_offset - from_offset >= min_len;
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}
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enum DedupeResult {
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DEDUPE_CONTINUE, //!< Continue with match, not a dupe.
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DEDUPE_SKIP, //!< Don't report this match, dupe or delayed due to SOM.
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DEDUPE_HALT //!< User instructed us to stop matching.
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};
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static really_inline
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enum DedupeResult dedupeCatchup(const struct RoseEngine *rose,
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const struct internal_report *ri,
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struct hs_scratch *scratch, u64a offset,
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u64a from_offset, u64a to_offset,
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const char do_som) {
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DEBUG_PRINTF("offset=%llu, match=[%llu,%llu], dkey=%u, do_som=%d\n", offset,
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from_offset, to_offset, ri->dkey, do_som);
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DEBUG_PRINTF("report type=%u, quashSom=%d\n", ri->type, ri->quashSom);
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const u32 dkey = ri->dkey;
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if (!do_som && dkey == MO_INVALID_IDX) {
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DEBUG_PRINTF("nothing to do\n");
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return DEDUPE_CONTINUE;
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}
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struct match_deduper *deduper = &scratch->deduper;
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if (offset != deduper->current_report_offset) {
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assert(deduper->current_report_offset == ~0ULL ||
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deduper->current_report_offset < offset);
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if (offset == deduper->current_report_offset + 1) {
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fatbit_clear(deduper->log[offset % 2]);
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} else {
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fatbit_clear(deduper->log[0]);
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fatbit_clear(deduper->log[1]);
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}
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if (do_som && flushStoredSomMatches(scratch, offset)) {
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return DEDUPE_HALT;
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}
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deduper->current_report_offset = offset;
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}
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if (dkey != MO_INVALID_IDX) {
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const u32 dkeyCount = rose->dkeyCount;
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const s32 offset_adj = ri->offsetAdjust;
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if (ri->type == EXTERNAL_CALLBACK || ri->quashSom) {
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DEBUG_PRINTF("checking dkey %u at offset %llu\n", dkey, to_offset);
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assert(offset_adj == 0 || offset_adj == -1);
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if (fatbit_set(deduper->log[to_offset % 2], dkeyCount, dkey)) {
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/* we have already raised this report at this offset, squash
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* dupe match. */
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DEBUG_PRINTF("dedupe\n");
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return DEDUPE_SKIP;
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}
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} else if (do_som) {
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/* SOM external event */
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DEBUG_PRINTF("checking dkey %u at offset %llu\n", dkey, to_offset);
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assert(offset_adj == 0 || offset_adj == -1);
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u64a *starts = deduper->som_start_log[to_offset % 2];
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if (fatbit_set(deduper->som_log[to_offset % 2], dkeyCount, dkey)) {
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starts[dkey] = MIN(starts[dkey], from_offset);
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} else {
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starts[dkey] = from_offset;
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}
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DEBUG_PRINTF("starts[%u]=%llu\n", dkey, starts[dkey]);
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if (offset_adj) {
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deduper->som_log_dirty |= 1;
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} else {
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deduper->som_log_dirty |= 2;
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}
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return DEDUPE_SKIP;
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}
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}
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return DEDUPE_CONTINUE;
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}
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static really_inline
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enum DedupeResult dedupeCatchupSom(const struct RoseEngine *rose,
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const struct internal_report *ri,
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struct hs_scratch *scratch, u64a offset,
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u64a from_offset, u64a to_offset) {
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DEBUG_PRINTF("offset=%llu, match=[%llu,%llu], dkey=%u\n", offset,
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from_offset, to_offset, ri->dkey);
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DEBUG_PRINTF("report type=%u, quashSom=%d\n", ri->type, ri->quashSom);
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struct match_deduper *deduper = &scratch->deduper;
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if (offset != deduper->current_report_offset) {
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assert(deduper->current_report_offset == ~0ULL ||
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deduper->current_report_offset < offset);
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if (offset == deduper->current_report_offset + 1) {
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fatbit_clear(deduper->log[offset % 2]);
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} else {
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fatbit_clear(deduper->log[0]);
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fatbit_clear(deduper->log[1]);
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}
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if (flushStoredSomMatches(scratch, offset)) {
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return DEDUPE_HALT;
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}
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deduper->current_report_offset = offset;
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}
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const u32 dkey = ri->dkey;
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if (dkey != MO_INVALID_IDX) {
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const u32 dkeyCount = rose->dkeyCount;
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const s32 offset_adj = ri->offsetAdjust;
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if (ri->quashSom) {
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DEBUG_PRINTF("checking dkey %u at offset %llu\n", dkey, to_offset);
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assert(offset_adj == 0 || offset_adj == -1);
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if (fatbit_set(deduper->log[to_offset % 2], dkeyCount, dkey)) {
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/* we have already raised this report at this offset, squash
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* dupe match. */
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DEBUG_PRINTF("dedupe\n");
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return DEDUPE_SKIP;
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}
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} else {
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/* SOM external event */
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DEBUG_PRINTF("checking dkey %u at offset %llu\n", dkey, to_offset);
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assert(offset_adj == 0 || offset_adj == -1);
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u64a *starts = deduper->som_start_log[to_offset % 2];
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if (fatbit_set(deduper->som_log[to_offset % 2], dkeyCount, dkey)) {
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starts[dkey] = MIN(starts[dkey], from_offset);
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} else {
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starts[dkey] = from_offset;
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}
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DEBUG_PRINTF("starts[%u]=%llu\n", dkey, starts[dkey]);
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if (offset_adj) {
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deduper->som_log_dirty |= 1;
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} else {
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deduper->som_log_dirty |= 2;
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}
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return DEDUPE_SKIP;
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}
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}
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return DEDUPE_CONTINUE;
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}
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static really_inline
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int roseAdaptor_i(u64a offset, ReportID id, struct hs_scratch *scratch,
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char is_simple, char do_som) {
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assert(id != MO_INVALID_IDX); // Should never get an invalid ID.
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assert(scratch);
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assert(scratch->magic == SCRATCH_MAGIC);
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struct core_info *ci = &scratch->core_info;
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const struct RoseEngine *rose = ci->rose;
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DEBUG_PRINTF("internal report %u\n", id);
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const struct internal_report *ri = getInternalReport(rose, id);
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assert(isExternalReport(ri)); /* only external reports should reach here */
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s32 offset_adj = ri->offsetAdjust;
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u64a to_offset = offset;
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u64a from_offset = 0;
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u32 flags = 0;
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#ifndef RELEASE_BUILD
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if (offset_adj) {
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// alert testing tools that we've got adjusted matches
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flags |= HS_MATCH_FLAG_ADJUSTED;
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}
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#endif
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DEBUG_PRINTF("internal match at %llu: IID=%u type=%hhu RID=%u "
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"offsetAdj=%d\n", offset, id, ri->type, ri->onmatch,
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offset_adj);
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if (unlikely(can_stop_matching(scratch))) { /* ok - we are from rose */
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DEBUG_PRINTF("pre broken - halting\n");
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return MO_HALT_MATCHING;
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}
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if (!is_simple && ri->hasBounds) {
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assert(ri->minOffset || ri->minLength || ri->maxOffset < MAX_OFFSET);
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assert(ri->minOffset <= ri->maxOffset);
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if (offset < ri->minOffset || offset > ri->maxOffset) {
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DEBUG_PRINTF("match fell outside valid range %llu !: [%llu,%llu]\n",
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offset, ri->minOffset, ri->maxOffset);
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return ROSE_CONTINUE_MATCHING_NO_EXHAUST;
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}
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}
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if (!is_simple && unlikely(isExhausted(ci->exhaustionVector, ri->ekey))) {
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DEBUG_PRINTF("ate exhausted match\n");
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return MO_CONTINUE_MATCHING;
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}
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if (ri->type == EXTERNAL_CALLBACK) {
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from_offset = 0;
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} else if (do_som) {
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from_offset = handleSomExternal(scratch, ri, to_offset);
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}
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to_offset += offset_adj;
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assert(from_offset == HS_OFFSET_PAST_HORIZON || from_offset <= to_offset);
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if (do_som && ri->minLength) {
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if (!satisfiesMinLength(ri->minLength, from_offset, to_offset)) {
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return ROSE_CONTINUE_MATCHING_NO_EXHAUST;
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}
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if (ri->quashSom) {
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from_offset = 0;
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}
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}
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DEBUG_PRINTF(">> reporting match @[%llu,%llu] for sig %u ctxt %p <<\n",
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from_offset, to_offset, ri->onmatch, ci->userContext);
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int halt = 0;
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enum DedupeResult dedupe_rv = dedupeCatchup(rose, ri, scratch, offset,
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from_offset, to_offset, do_som);
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switch (dedupe_rv) {
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case DEDUPE_HALT:
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halt = 1;
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goto exit;
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case DEDUPE_SKIP:
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halt = 0;
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goto exit;
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case DEDUPE_CONTINUE:
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break;
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}
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halt = ci->userCallback((unsigned int)ri->onmatch, from_offset, to_offset,
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flags, ci->userContext);
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exit:
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if (halt) {
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DEBUG_PRINTF("callback requested to terminate matches\n");
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ci->broken = BROKEN_FROM_USER;
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return MO_HALT_MATCHING;
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}
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if (!is_simple && ri->ekey != END_EXHAUST) {
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markAsMatched(ci->exhaustionVector, ri->ekey);
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return MO_CONTINUE_MATCHING;
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} else {
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return ROSE_CONTINUE_MATCHING_NO_EXHAUST;
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}
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}
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/**
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* \brief Deliver the given report to the user callback.
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*
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* Assumes all preconditions (bounds, exhaustion etc) have been checked and
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* that dedupe catchup has been done.
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*/
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static really_inline
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int roseDeliverReport(u64a offset, ReportID id, struct hs_scratch *scratch,
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char is_exhaustible) {
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assert(id != MO_INVALID_IDX); // Should never get an invalid ID.
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assert(scratch);
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assert(scratch->magic == SCRATCH_MAGIC);
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struct core_info *ci = &scratch->core_info;
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const struct RoseEngine *rose = ci->rose;
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DEBUG_PRINTF("internal report %u\n", id);
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const struct internal_report *ri = getInternalReport(rose, id);
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assert(isExternalReport(ri)); /* only external reports should reach here */
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const s32 offset_adj = ri->offsetAdjust;
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u32 flags = 0;
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#ifndef RELEASE_BUILD
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if (offset_adj) {
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// alert testing tools that we've got adjusted matches
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flags |= HS_MATCH_FLAG_ADJUSTED;
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}
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#endif
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DEBUG_PRINTF("internal match at %llu: IID=%u type=%hhu RID=%u "
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"offsetAdj=%d\n", offset, id, ri->type, ri->onmatch,
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offset_adj);
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assert(!can_stop_matching(scratch));
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assert(!ri->hasBounds ||
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(offset >= ri->minOffset && offset <= ri->maxOffset));
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assert(ri->type == EXTERNAL_CALLBACK);
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assert(!ri->minLength);
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assert(!ri->quashSom);
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assert(ri->ekey == INVALID_EKEY ||
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!isExhausted(ci->exhaustionVector, ri->ekey));
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u64a from_offset = 0;
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u64a to_offset = offset + offset_adj;
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DEBUG_PRINTF(">> reporting match @[%llu,%llu] for sig %u ctxt %p <<\n",
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from_offset, to_offset, ri->onmatch, ci->userContext);
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int halt = ci->userCallback((unsigned int)ri->onmatch, from_offset,
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to_offset, flags, ci->userContext);
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if (halt) {
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DEBUG_PRINTF("callback requested to terminate matches\n");
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ci->broken = BROKEN_FROM_USER;
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return MO_HALT_MATCHING;
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}
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if (is_exhaustible) {
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assert(ri->ekey != INVALID_EKEY);
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markAsMatched(ci->exhaustionVector, ri->ekey);
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return MO_CONTINUE_MATCHING;
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} else {
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return ROSE_CONTINUE_MATCHING_NO_EXHAUST;
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}
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}
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static really_inline
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int roseSomAdaptor_i(u64a from_offset, u64a to_offset, ReportID id,
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struct hs_scratch *scratch, char is_simple) {
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assert(id != MO_INVALID_IDX); // Should never get an invalid ID.
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assert(scratch);
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assert(scratch->magic == SCRATCH_MAGIC);
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u32 flags = 0;
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struct core_info *ci = &scratch->core_info;
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const struct RoseEngine *rose = ci->rose;
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const struct internal_report *ri = getInternalReport(rose, id);
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/* internal events should be handled by rose directly */
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assert(ri->type == EXTERNAL_CALLBACK);
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DEBUG_PRINTF("internal match at %llu: IID=%u type=%hhu RID=%u "
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"offsetAdj=%d\n", to_offset, id, ri->type, ri->onmatch,
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ri->offsetAdjust);
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if (unlikely(can_stop_matching(scratch))) {
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DEBUG_PRINTF("pre broken - halting\n");
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return MO_HALT_MATCHING;
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}
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if (!is_simple && ri->hasBounds) {
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assert(ri->minOffset || ri->minLength || ri->maxOffset < MAX_OFFSET);
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if (to_offset < ri->minOffset || to_offset > ri->maxOffset) {
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DEBUG_PRINTF("match fell outside valid range %llu !: [%llu,%llu]\n",
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to_offset, ri->minOffset, ri->maxOffset);
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return MO_CONTINUE_MATCHING;
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}
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}
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int halt = 0;
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if (!is_simple && unlikely(isExhausted(ci->exhaustionVector, ri->ekey))) {
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DEBUG_PRINTF("ate exhausted match\n");
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goto exit;
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}
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u64a offset = to_offset;
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to_offset += ri->offsetAdjust;
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assert(from_offset == HS_OFFSET_PAST_HORIZON || from_offset <= to_offset);
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if (!is_simple && ri->minLength) {
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if (!satisfiesMinLength(ri->minLength, from_offset, to_offset)) {
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return MO_CONTINUE_MATCHING;
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}
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if (ri->quashSom) {
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from_offset = 0;
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}
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}
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DEBUG_PRINTF(">> reporting match @[%llu,%llu] for sig %u ctxt %p <<\n",
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from_offset, to_offset, ri->onmatch, ci->userContext);
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#ifndef RELEASE_BUILD
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if (ri->offsetAdjust != 0) {
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// alert testing tools that we've got adjusted matches
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flags |= HS_MATCH_FLAG_ADJUSTED;
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}
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#endif
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enum DedupeResult dedupe_rv =
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dedupeCatchupSom(rose, ri, scratch, offset, from_offset, to_offset);
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switch (dedupe_rv) {
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case DEDUPE_HALT:
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halt = 1;
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goto exit;
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case DEDUPE_SKIP:
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halt = 0;
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goto exit;
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case DEDUPE_CONTINUE:
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break;
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}
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halt = ci->userCallback((unsigned int)ri->onmatch, from_offset, to_offset,
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flags, ci->userContext);
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if (!is_simple) {
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markAsMatched(ci->exhaustionVector, ri->ekey);
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}
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exit:
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if (halt) {
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DEBUG_PRINTF("callback requested to terminate matches\n");
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ci->broken = BROKEN_FROM_USER;
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return MO_HALT_MATCHING;
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}
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return MO_CONTINUE_MATCHING;
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}
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/**
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* \brief Deliver the given SOM report to the user callback.
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*
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* Assumes all preconditions (bounds, exhaustion etc) have been checked and
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* that dedupe catchup has been done.
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*/
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static really_inline
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int roseDeliverSomReport(u64a from_offset, u64a to_offset, ReportID id,
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struct hs_scratch *scratch, char is_exhaustible) {
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assert(id != MO_INVALID_IDX); // Should never get an invalid ID.
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assert(scratch);
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assert(scratch->magic == SCRATCH_MAGIC);
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|
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u32 flags = 0;
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|
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struct core_info *ci = &scratch->core_info;
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const struct RoseEngine *rose = ci->rose;
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const struct internal_report *ri = getInternalReport(rose, id);
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|
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assert(isExternalReport(ri)); /* only external reports should reach here */
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|
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DEBUG_PRINTF("internal match at %llu: IID=%u type=%hhu RID=%u "
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"offsetAdj=%d\n", to_offset, id, ri->type, ri->onmatch,
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ri->offsetAdjust);
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|
|
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assert(!can_stop_matching(scratch));
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|
assert(!ri->hasBounds ||
|
|
(to_offset >= ri->minOffset && to_offset <= ri->maxOffset));
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|
assert(ri->ekey == INVALID_EKEY ||
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!isExhausted(ci->exhaustionVector, ri->ekey));
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|
|
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to_offset += ri->offsetAdjust;
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|
assert(from_offset == HS_OFFSET_PAST_HORIZON || from_offset <= to_offset);
|
|
|
|
assert(!ri->minLength ||
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|
satisfiesMinLength(ri->minLength, from_offset, to_offset));
|
|
assert(!ri->quashSom || from_offset == 0);
|
|
|
|
DEBUG_PRINTF(">> reporting match @[%llu,%llu] for sig %u ctxt %p <<\n",
|
|
from_offset, to_offset, ri->onmatch, ci->userContext);
|
|
|
|
#ifndef RELEASE_BUILD
|
|
if (ri->offsetAdjust != 0) {
|
|
// alert testing tools that we've got adjusted matches
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|
flags |= HS_MATCH_FLAG_ADJUSTED;
|
|
}
|
|
#endif
|
|
|
|
int halt = ci->userCallback((unsigned int)ri->onmatch, from_offset,
|
|
to_offset, flags, ci->userContext);
|
|
|
|
if (halt) {
|
|
DEBUG_PRINTF("callback requested to terminate matches\n");
|
|
ci->broken = BROKEN_FROM_USER;
|
|
return MO_HALT_MATCHING;
|
|
}
|
|
|
|
if (is_exhaustible) {
|
|
assert(ri->ekey != INVALID_EKEY);
|
|
markAsMatched(ci->exhaustionVector, ri->ekey);
|
|
return MO_CONTINUE_MATCHING;
|
|
} else {
|
|
return ROSE_CONTINUE_MATCHING_NO_EXHAUST;
|
|
}
|
|
}
|
|
|
|
#endif // REPORT_H
|