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rose/hwlm: limit literals to eight bytes

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Rework HWLM to work over literals of eight bytes ("medium length"),
doing confirm in the Rose interpreter.
This commit is contained in:
Justin Viiret
2016-11-28 16:46:03 +11:00
committed by Matthew Barr
parent 5c9c540424
commit 07a6b6510c
19 changed files with 452 additions and 348 deletions
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16
src/rose/rose_build_matchers.h
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@@ -1,5 +1,5 @@
/*
* Copyright (c) 2016, Intel Corporation
* Copyright (c) 2016-2017, Intel Corporation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
@@ -44,15 +44,21 @@ namespace ue2 {
struct hwlmLiteral;
struct MatcherProto {
std::vector<hwlmLiteral> lits;
size_t history_required = 0;
};
/**
* \brief Build up a vector of literals for the given table.
* \brief Build up a vector of literals (and associated other data) for the
* given table.
*
* If max_offset is specified (and not ROSE_BOUND_INF), then literals that can
* only lead to a pattern match after max_offset may be excluded.
*/
std::vector<hwlmLiteral> fillHamsterLiteralList(const RoseBuildImpl &build,
rose_literal_table table, size_t max_len,
u32 max_offset = ROSE_BOUND_INF);
MatcherProto makeMatcherProto(const RoseBuildImpl &build,
rose_literal_table table, size_t max_len,
u32 max_offset = ROSE_BOUND_INF);
aligned_unique_ptr<HWLM> buildFloatingMatcher(const RoseBuildImpl &build,
size_t longLitLengthThreshold,