From 189e3c0ada43e4adb00d601dfdd26cdc42cffb2d Mon Sep 17 00:00:00 2001 From: TSUYUSATO Kitsune Date: Thu, 17 Nov 2022 13:58:08 +0900 Subject: [PATCH] Add default cases for cache point finding function --- regexec.c | 94 +++++++++++++++++++++++++++++++++++-------------------- 1 file changed, 60 insertions(+), 34 deletions(-) diff --git a/regexec.c b/regexec.c index 16b155b8478532..f7c5d12133ff5b 100644 --- a/regexec.c +++ b/regexec.c @@ -234,10 +234,8 @@ onig_get_capture_tree(OnigRegion* region) #ifdef USE_CACHE_MATCH_OPT /* count number of jump-like opcodes for allocation of cache memory. */ -/* return -1 if we cannot optimize the regex matching by using cache. */ -static long count_num_cache_opcode(regex_t* reg, long* table_size) +static OnigPosition count_num_cache_opcode(regex_t* reg, long* num, long* table_size) { - long num = 0; UChar* p = reg->p; UChar* pend = p + reg->used; LengthType len; @@ -246,6 +244,9 @@ static long count_num_cache_opcode(regex_t* reg, long* table_size) long current_mem_num = 0; OnigEncoding enc = reg->enc; + *num = 0; + *table_size = 0; + while (p < pend) { switch (*p++) { case OP_FINISH: @@ -298,10 +299,10 @@ static long count_num_cache_opcode(regex_t* reg, long* table_size) break; case OP_ANYCHAR_STAR: case OP_ANYCHAR_ML_STAR: - num++; *table_size += 1; break; + *num += 1; *table_size += 1; break; case OP_ANYCHAR_STAR_PEEK_NEXT: case OP_ANYCHAR_ML_STAR_PEEK_NEXT: - p++; num++; *table_size += 1; break; + p++; *num += 1; *table_size += 1; break; case OP_WORD: case OP_NOT_WORD: @@ -334,7 +335,7 @@ static long count_num_cache_opcode(regex_t* reg, long* table_size) case OP_BACKREF_MULTI: case OP_BACKREF_MULTI_IC: case OP_BACKREF_WITH_LEVEL: - return NUM_CACHE_OPCODE_FAIL; + goto fail; case OP_MEMORY_START: case OP_MEMORY_START_PUSH: @@ -354,43 +355,43 @@ static long count_num_cache_opcode(regex_t* reg, long* table_size) break; case OP_PUSH: p += SIZE_RELADDR; - num++; + *num += 1; *table_size += 1; break; case OP_POP: break; case OP_PUSH_OR_JUMP_EXACT1: case OP_PUSH_IF_PEEK_NEXT: - p += SIZE_RELADDR + 1; num++; *table_size += 1; break; + p += SIZE_RELADDR + 1; *num += 1; *table_size += 1; break; case OP_REPEAT: case OP_REPEAT_NG: if (current_mem != -1) { // A nested OP_REPEAT is not yet supported. - return NUM_CACHE_OPCODE_FAIL; + goto fail; } GET_MEMNUM_INC(mem, p); p += SIZE_RELADDR; if (reg->repeat_range[mem].lower == 0) { - num++; + *num += 1; *table_size += 1; } - reg->repeat_range[mem].base_num = num; + reg->repeat_range[mem].base_num = *num; current_mem = mem; - current_mem_num = num; + current_mem_num = *num; break; case OP_REPEAT_INC: case OP_REPEAT_INC_NG: GET_MEMNUM_INC(mem, p); if (mem != current_mem) { // A lone or invalid OP_REPEAT_INC is found. - return NUM_CACHE_OPCODE_FAIL; + goto fail; } { - long inner_num = num - current_mem_num; + long inner_num = *num - current_mem_num; OnigRepeatRange *repeat_range = ®->repeat_range[mem]; repeat_range->inner_num = inner_num; - num -= inner_num; - num += inner_num * repeat_range->lower + (inner_num + 1) * (repeat_range->upper == 0x7fffffff ? 1 : repeat_range->upper - repeat_range->lower); + *num -= inner_num; + *num += inner_num * repeat_range->lower + (inner_num + 1) * (repeat_range->upper == 0x7fffffff ? 1 : repeat_range->upper - repeat_range->lower); if (repeat_range->lower < repeat_range->upper) { *table_size += 1; } @@ -401,7 +402,7 @@ static long count_num_cache_opcode(regex_t* reg, long* table_size) case OP_REPEAT_INC_SG: case OP_REPEAT_INC_NG_SG: // TODO: Support nested OP_REPEAT. - return NUM_CACHE_OPCODE_FAIL; + goto fail; case OP_NULL_CHECK_START: case OP_NULL_CHECK_END: case OP_NULL_CHECK_END_MEMST: @@ -420,33 +421,43 @@ static long count_num_cache_opcode(regex_t* reg, long* table_size) case OP_PUSH_ABSENT_POS: case OP_ABSENT_END: case OP_ABSENT: - return NUM_CACHE_OPCODE_FAIL; + goto fail; case OP_CALL: case OP_RETURN: - return NUM_CACHE_OPCODE_FAIL; + goto fail; case OP_CONDITION: - return NUM_CACHE_OPCODE_FAIL; + goto fail; case OP_STATE_CHECK_PUSH: case OP_STATE_CHECK_PUSH_OR_JUMP: case OP_STATE_CHECK: case OP_STATE_CHECK_ANYCHAR_STAR: case OP_STATE_CHECK_ANYCHAR_ML_STAR: - return NUM_CACHE_OPCODE_FAIL; + goto fail; case OP_SET_OPTION_PUSH: case OP_SET_OPTION: p += SIZE_OPTION; break; + + default: + goto bytecode_error; } } - return num; + return 0; + +fail: + *num = NUM_CACHE_OPCODE_FAIL; + return 0; + +bytecode_error: + return ONIGERR_UNDEFINED_BYTECODE; } -static void init_cache_index_table(regex_t* reg, OnigCacheIndex *table) +static OnigPosition init_cache_index_table(regex_t* reg, OnigCacheIndex *table) { UChar* pbegin; UChar* p = reg->p; @@ -558,7 +569,7 @@ static void init_cache_index_table(regex_t* reg, OnigCacheIndex *table) case OP_BACKREF_MULTI: case OP_BACKREF_MULTI_IC: case OP_BACKREF_WITH_LEVEL: - return; + goto unexpected_bytecode_error; case OP_MEMORY_START: case OP_MEMORY_START_PUSH: @@ -630,7 +641,7 @@ static void init_cache_index_table(regex_t* reg, OnigCacheIndex *table) case OP_REPEAT_INC_SG: case OP_REPEAT_INC_NG_SG: // TODO: support OP_REPEAT opcodes. - return; + goto unexpected_bytecode_error; case OP_NULL_CHECK_START: case OP_NULL_CHECK_END: case OP_NULL_CHECK_END_MEMST: @@ -649,28 +660,39 @@ static void init_cache_index_table(regex_t* reg, OnigCacheIndex *table) case OP_PUSH_ABSENT_POS: case OP_ABSENT_END: case OP_ABSENT: - return; + goto unexpected_bytecode_error; case OP_CALL: case OP_RETURN: - return; + goto unexpected_bytecode_error; case OP_CONDITION: - return; + goto unexpected_bytecode_error; case OP_STATE_CHECK_PUSH: case OP_STATE_CHECK_PUSH_OR_JUMP: case OP_STATE_CHECK: case OP_STATE_CHECK_ANYCHAR_STAR: case OP_STATE_CHECK_ANYCHAR_ML_STAR: - return; + goto unexpected_bytecode_error; case OP_SET_OPTION_PUSH: case OP_SET_OPTION: p += SIZE_OPTION; break; + + default: + goto bytecode_error; } } + + return 0; + +unexpected_bytecode_error: + return ONIGERR_UNEXPECTED_BYTECODE; + +bytecode_error: + return ONIGERR_UNDEFINED_BYTECODE; } #endif /* USE_MATCH_CACHE */ @@ -861,6 +883,7 @@ onig_region_copy(OnigRegion* to, const OnigRegion* from) (msa).enable_cache_match_opt = 0;\ (msa).num_fail = 0;\ (msa).num_cache_opcode = NUM_CACHE_OPCODE_UNINIT;\ + (msa).num_cache_table = 0;\ (msa).cache_index_table = (OnigCacheIndex *)0;\ (msa).match_cache = (uint8_t *)0;\ } while(0) @@ -3820,23 +3843,26 @@ match_at(regex_t* reg, const UChar* str, const UChar* end, #ifdef USE_CACHE_MATCH_OPT if (++msa->num_fail >= (long)(end - str) + 1 && msa->num_cache_opcode == NUM_CACHE_OPCODE_UNINIT) { - long table_size = 0; msa->enable_cache_match_opt = 1; if (msa->num_cache_opcode == NUM_CACHE_OPCODE_UNINIT) { - msa->num_cache_opcode = count_num_cache_opcode(reg, &table_size); + OnigPosition r = count_num_cache_opcode(reg, &msa->num_cache_opcode, &msa->num_cache_table); + if (r < 0) goto bytecode_error; } if (msa->num_cache_opcode == NUM_CACHE_OPCODE_FAIL || msa->num_cache_opcode == 0) { msa->enable_cache_match_opt = 0; goto fail_match_cache_opt; } if (msa->cache_index_table == NULL) { - OnigCacheIndex *table = (OnigCacheIndex *)xmalloc(table_size * sizeof(OnigCacheIndex)); + OnigCacheIndex *table = (OnigCacheIndex *)xmalloc(msa->num_cache_table * sizeof(OnigCacheIndex)); if (table == NULL) { return ONIGERR_MEMORY; } - init_cache_index_table(reg, table); + OnigPosition r = init_cache_index_table(reg, table); + if (r < 0) { + if (r == ONIGERR_UNEXPECTED_BYTECODE) goto unexpected_bytecode_error; + else goto bytecode_error; + } msa->cache_index_table = table; - msa->num_cache_table = table_size; } size_t len = (end - str) + 1; size_t match_cache_size8 = (size_t)msa->num_cache_opcode * len;