Improve invalid UTF character reading in JIT.
This commit is contained in:
Zoltán Herczeg
parent
3fce7c75e9
commit
7035170527
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@ -485,7 +485,7 @@ typedef struct compiler_common {
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jump_list *getucdtype;
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#if PCRE2_CODE_UNIT_WIDTH == 8
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jump_list *utfreadchar;
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jump_list *utfreadchar_invalid_precise;
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jump_list *utfreadnewline_invalid;
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jump_list *utfreadtype8;
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jump_list *utfpeakcharback;
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#endif
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@ -3464,8 +3464,8 @@ if (common->utf)
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}
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#define READ_CHAR_UPDATE_STR_PTR 0x1
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#define READ_CHAR_UPDATE_STR_PTR_INVALID 0x2
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#define READ_CHAR_UPDATE_STR_PTR_PRECISE (READ_CHAR_UPDATE_STR_PTR | READ_CHAR_UPDATE_STR_PTR_INVALID)
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#define READ_CHAR_UTF8_NEWLINE 0x2
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#define READ_CHAR_NEWLINE (READ_CHAR_UPDATE_STR_PTR | READ_CHAR_UTF8_NEWLINE)
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#define READ_CHAR_VALID_UTF 0x4
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static void read_char(compiler_common *common, sljit_u32 min, sljit_u32 max,
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@ -3501,8 +3501,8 @@ if (common->utf)
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{
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jump = CMP(SLJIT_LESS, TMP1, 0, SLJIT_IMM, 0x80);
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if (options & READ_CHAR_UPDATE_STR_PTR_INVALID)
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add_jump(compiler, &common->utfreadchar_invalid_precise, JUMP(SLJIT_FAST_CALL));
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if (options & READ_CHAR_UTF8_NEWLINE)
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add_jump(compiler, &common->utfreadnewline_invalid, JUMP(SLJIT_FAST_CALL));
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else
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add_jump(compiler, &common->utfreadchar_invalid, JUMP(SLJIT_FAST_CALL));
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@ -3999,6 +3999,7 @@ of the character (>= 0xc0). Return char value in TMP1. STR_PTR is
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undefined for invalid characters. */
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DEFINE_COMPILER;
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sljit_s32 i;
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sljit_s32 has_cmove = sljit_has_cpu_feature(SLJIT_HAS_CMOV);
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struct sljit_jump *jump;
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struct sljit_jump *buffer_end_close;
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struct sljit_label *three_byte_entry;
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@ -4045,11 +4046,25 @@ jump = JUMP(SLJIT_NOT_ZERO);
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three_byte_entry = LABEL();
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OP2(SLJIT_SUB, TMP1, 0, TMP1, 0, SLJIT_IMM, 0x2d800);
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exit_invalid[3] = CMP(SLJIT_LESS, TMP1, 0, SLJIT_IMM, 0x800);
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if (has_cmove)
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{
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OP2(SLJIT_SUB | SLJIT_SET_LESS, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, 0x800);
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CMOV(SLJIT_LESS, TMP1, SLJIT_IMM, INVALID_UTF_CHAR - 0xd800);
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exit_invalid[3] = NULL;
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}
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else
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exit_invalid[3] = CMP(SLJIT_LESS, TMP1, 0, SLJIT_IMM, 0x800);
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OP2(SLJIT_ADD, TMP1, 0, TMP1, 0, SLJIT_IMM, 0xd800);
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OP2(SLJIT_SUB, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
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exit_invalid[4] = CMP(SLJIT_LESS, TMP1, 0, SLJIT_IMM, 0x800);
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if (has_cmove)
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{
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OP2(SLJIT_SUB | SLJIT_SET_LESS, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, 0x800);
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CMOV(SLJIT_LESS, TMP1, SLJIT_IMM, INVALID_UTF_CHAR);
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exit_invalid[4] = NULL;
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}
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else
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exit_invalid[4] = CMP(SLJIT_LESS, TMP1, 0, SLJIT_IMM, 0x800);
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sljit_emit_fast_return(compiler, RETURN_ADDR, 0);
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JUMPHERE(jump);
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@ -4062,7 +4077,14 @@ OP2(SLJIT_OR, TMP1, 0, TMP1, 0, TMP2, 0);
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exit_invalid[5] = CMP(SLJIT_GREATER_EQUAL, TMP2, 0, SLJIT_IMM, 0x40);
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OP2(SLJIT_SUB, TMP1, 0, TMP1, 0, SLJIT_IMM, 0xc10000);
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exit_invalid[6] = CMP(SLJIT_GREATER_EQUAL, TMP1, 0, SLJIT_IMM, 0x100000);
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if (has_cmove)
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{
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OP2(SLJIT_SUB | SLJIT_SET_GREATER_EQUAL, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, 0x100000);
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CMOV(SLJIT_GREATER_EQUAL, TMP1, SLJIT_IMM, INVALID_UTF_CHAR - 0x10000);
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exit_invalid[6] = NULL;
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}
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else
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exit_invalid[6] = CMP(SLJIT_GREATER_EQUAL, TMP1, 0, SLJIT_IMM, 0x100000);
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OP2(SLJIT_ADD, TMP1, 0, TMP1, 0, SLJIT_IMM, 0x10000);
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sljit_emit_fast_return(compiler, RETURN_ADDR, 0);
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@ -4108,7 +4130,7 @@ OP1(SLJIT_MOV, TMP1, 0, SLJIT_IMM, INVALID_UTF_CHAR);
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sljit_emit_fast_return(compiler, RETURN_ADDR, 0);
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}
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static void do_utfreadchar_invalid_precise(compiler_common *common)
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static void do_utfreadnewline_invalid(compiler_common *common)
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{
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/* Slow decoding a UTF-8 character. TMP1 contains the first byte
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of the character (>= 0xc0). Return char value in TMP1. */
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@ -4118,7 +4140,7 @@ struct sljit_jump *buffer_end_close;
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struct sljit_label *two_byte_entry;
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struct sljit_label *three_byte_entry;
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struct sljit_label *exit_invalid_label;
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struct sljit_jump *exit_invalid[12];
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struct sljit_jump *exit_invalid[10];
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sljit_emit_fast_enter(compiler, RETURN_ADDR, 0);
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@ -4163,51 +4185,45 @@ jump = JUMP(SLJIT_NOT_ZERO);
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three_byte_entry = LABEL();
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OP2(SLJIT_SUB, TMP1, 0, TMP1, 0, SLJIT_IMM, 0x2d800);
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exit_invalid[4] = CMP(SLJIT_LESS, TMP1, 0, SLJIT_IMM, 0x800);
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OP2(SLJIT_ADD, TMP1, 0, TMP1, 0, SLJIT_IMM, 0xd800);
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OP2(SLJIT_SUB, TMP1, 0, TMP1, 0, SLJIT_IMM, 0x20000);
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OP2(SLJIT_SUB, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
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exit_invalid[5] = CMP(SLJIT_LESS, TMP1, 0, SLJIT_IMM, 0x800);
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/* Range between 0xd800 - 0xdfff is not checked. */
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exit_invalid[4] = CMP(SLJIT_LESS, TMP1, 0, SLJIT_IMM, 0x800);
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sljit_emit_fast_return(compiler, RETURN_ADDR, 0);
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JUMPHERE(jump);
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/* Four-byte sequence. */
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/* No four byte long newline. */
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OP1(MOV_UCHAR, TMP2, 0, SLJIT_MEM1(STR_PTR), IN_UCHARS(-1));
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OP2(SLJIT_SHL, TMP1, 0, TMP1, 0, SLJIT_IMM, 6);
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OP2(SLJIT_SUB, TMP2, 0, TMP2, 0, SLJIT_IMM, 0x80);
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OP2(SLJIT_OR, TMP1, 0, TMP1, 0, TMP2, 0);
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exit_invalid[6] = CMP(SLJIT_GREATER_EQUAL, TMP2, 0, SLJIT_IMM, 0x40);
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exit_invalid[5] = CMP(SLJIT_GREATER_EQUAL, TMP2, 0, SLJIT_IMM, 0x40);
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OP2(SLJIT_SUB, TMP1, 0, TMP1, 0, SLJIT_IMM, 0xc10000);
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exit_invalid[7] = CMP(SLJIT_GREATER_EQUAL, TMP1, 0, SLJIT_IMM, 0x100000);
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OP2(SLJIT_ADD, TMP1, 0, TMP1, 0, SLJIT_IMM, 0x10000);
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OP1(SLJIT_MOV, TMP1, 0, SLJIT_IMM, INVALID_UTF_CHAR);
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sljit_emit_fast_return(compiler, RETURN_ADDR, 0);
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JUMPHERE(buffer_end_close);
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OP2(SLJIT_SUB, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(2));
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exit_invalid[8] = CMP(SLJIT_GREATER, STR_PTR, 0, STR_END, 0);
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exit_invalid[6] = CMP(SLJIT_GREATER, STR_PTR, 0, STR_END, 0);
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/* Two-byte sequence. */
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OP1(MOV_UCHAR, TMP2, 0, SLJIT_MEM1(STR_PTR), IN_UCHARS(-1));
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OP2(SLJIT_SHL, TMP1, 0, TMP1, 0, SLJIT_IMM, 6);
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OP2(SLJIT_SUB, TMP2, 0, TMP2, 0, SLJIT_IMM, 0x80);
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OP2(SLJIT_OR, TMP1, 0, TMP1, 0, TMP2, 0);
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exit_invalid[9] = CMP(SLJIT_GREATER_EQUAL, TMP2, 0, SLJIT_IMM, 0x40);
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exit_invalid[7] = CMP(SLJIT_GREATER_EQUAL, TMP2, 0, SLJIT_IMM, 0x40);
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OP2(SLJIT_AND | SLJIT_SET_Z, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, 0x800);
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JUMPTO(SLJIT_ZERO, two_byte_entry);
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/* Three-byte sequence. */
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exit_invalid[10] = CMP(SLJIT_GREATER_EQUAL, STR_PTR, 0, STR_END, 0);
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exit_invalid[8] = CMP(SLJIT_GREATER_EQUAL, STR_PTR, 0, STR_END, 0);
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OP1(MOV_UCHAR, TMP2, 0, SLJIT_MEM1(STR_PTR), IN_UCHARS(0));
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OP2(SLJIT_SHL, TMP1, 0, TMP1, 0, SLJIT_IMM, 6);
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OP2(SLJIT_SUB, TMP2, 0, TMP2, 0, SLJIT_IMM, 0x80);
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OP2(SLJIT_OR, TMP1, 0, TMP1, 0, TMP2, 0);
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exit_invalid[11] = CMP(SLJIT_GREATER_EQUAL, TMP2, 0, SLJIT_IMM, 0x40);
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exit_invalid[9] = CMP(SLJIT_GREATER_EQUAL, TMP2, 0, SLJIT_IMM, 0x40);
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/* One will be substracted from STR_PTR later. */
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OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(2));
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@ -4216,19 +4232,17 @@ OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(2));
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CMPTO(SLJIT_LESS, TMP1, 0, SLJIT_IMM, 0x30000, three_byte_entry);
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exit_invalid_label = LABEL();
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sljit_set_label(exit_invalid[4], exit_invalid_label);
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sljit_set_label(exit_invalid[5], exit_invalid_label);
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sljit_set_label(exit_invalid[6], exit_invalid_label);
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sljit_set_label(exit_invalid[8], exit_invalid_label);
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sljit_set_label(exit_invalid[9], exit_invalid_label);
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sljit_set_label(exit_invalid[7], exit_invalid_label);
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OP2(SLJIT_SUB, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
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exit_invalid_label = LABEL();
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sljit_set_label(exit_invalid[2], exit_invalid_label);
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sljit_set_label(exit_invalid[5], exit_invalid_label);
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sljit_set_label(exit_invalid[7], exit_invalid_label);
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sljit_set_label(exit_invalid[10], exit_invalid_label);
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sljit_set_label(exit_invalid[11], exit_invalid_label);
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sljit_set_label(exit_invalid[4], exit_invalid_label);
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sljit_set_label(exit_invalid[8], exit_invalid_label);
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sljit_set_label(exit_invalid[9], exit_invalid_label);
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OP1(SLJIT_MOV, TMP1, 0, SLJIT_IMM, INVALID_UTF_CHAR);
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sljit_emit_fast_return(compiler, RETURN_ADDR, 0);
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@ -4717,7 +4731,7 @@ if ((overall_options & PCRE2_FIRSTLINE) != 0)
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mainloop = LABEL();
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/* Continual stores does not cause data dependency. */
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OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_SP), common->match_end_ptr, STR_PTR, 0);
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read_char(common, common->nlmin, common->nlmax, NULL, READ_CHAR_UPDATE_STR_PTR_PRECISE);
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read_char(common, common->nlmin, common->nlmax, NULL, READ_CHAR_NEWLINE);
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check_newlinechar(common, common->nltype, &newline, TRUE);
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CMPTO(SLJIT_LESS, STR_PTR, 0, STR_END, 0, mainloop);
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JUMPHERE(end);
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@ -6347,7 +6361,7 @@ move_back(common, NULL, FALSE);
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loop = LABEL();
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common->ff_newline_shortcut = loop;
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read_char(common, common->nlmin, common->nlmax, NULL, READ_CHAR_UPDATE_STR_PTR_PRECISE);
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read_char(common, common->nlmin, common->nlmax, NULL, READ_CHAR_NEWLINE);
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lastchar = CMP(SLJIT_GREATER_EQUAL, STR_PTR, 0, STR_END, 0);
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if (common->nltype == NLTYPE_ANY || common->nltype == NLTYPE_ANYCRLF)
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foundcr = CMP(SLJIT_EQUAL, TMP1, 0, SLJIT_IMM, CHAR_CR);
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@ -7272,7 +7286,7 @@ if (context->sourcereg == -1)
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OP1(SLJIT_MOV_U16, TMP1, 0, SLJIT_MEM1(STR_PTR), -context->length);
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else
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#endif
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OP1(SLJIT_MOV_U8, TMP1, 0, SLJIT_MEM1(STR_PTR), -context->length);
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OP1(MOV_UCHAR, TMP1, 0, SLJIT_MEM1(STR_PTR), -context->length);
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#elif PCRE2_CODE_UNIT_WIDTH == 16
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#if defined SLJIT_UNALIGNED && SLJIT_UNALIGNED
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if (context->length >= 4)
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@ -8633,11 +8647,14 @@ switch(type)
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if (common->utf && HAS_EXTRALEN(*cc)) length += GET_EXTRALEN(*cc);
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#endif
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if (common->mode == PCRE2_JIT_COMPLETE && check_str_ptr
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&& (type == OP_CHAR || !char_has_othercase(common, cc) || char_get_othercase_bit(common, cc) != 0))
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if (check_str_ptr && common->mode != PCRE2_JIT_COMPLETE)
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detect_partial_match(common, backtracks);
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if (type == OP_CHAR || !char_has_othercase(common, cc) || char_get_othercase_bit(common, cc) != 0)
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{
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OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(length));
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add_jump(compiler, backtracks, CMP(SLJIT_GREATER, STR_PTR, 0, STR_END, 0));
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if (length > 1 || (check_str_ptr && common->mode == PCRE2_JIT_COMPLETE))
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add_jump(compiler, backtracks, CMP(SLJIT_GREATER, STR_PTR, 0, STR_END, 0));
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context.length = IN_UCHARS(length);
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context.sourcereg = -1;
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@ -8647,8 +8664,6 @@ switch(type)
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return byte_sequence_compare(common, type == OP_CHARI, cc, &context, backtracks);
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}
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if (check_str_ptr)
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detect_partial_match(common, backtracks);
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#ifdef SUPPORT_UNICODE
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if (common->utf)
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{
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@ -8658,26 +8673,28 @@ switch(type)
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#endif
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c = *cc;
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if (type == OP_CHAR || !char_has_othercase(common, cc))
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{
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read_char(common, c, c, NULL, 0);
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add_jump(compiler, backtracks, CMP(SLJIT_NOT_EQUAL, TMP1, 0, SLJIT_IMM, c));
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return cc + length;
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}
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SLJIT_ASSERT(type == OP_CHARI && char_has_othercase(common, cc));
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if (check_str_ptr && common->mode == PCRE2_JIT_COMPLETE)
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add_jump(compiler, backtracks, CMP(SLJIT_GREATER_EQUAL, STR_PTR, 0, STR_END, 0));
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oc = char_othercase(common, c);
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read_char(common, c < oc ? c : oc, c > oc ? c : oc, NULL, 0);
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bit = c ^ oc;
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if (is_powerof2(bit))
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{
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OP2(SLJIT_OR, TMP1, 0, TMP1, 0, SLJIT_IMM, bit);
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add_jump(compiler, backtracks, CMP(SLJIT_NOT_EQUAL, TMP1, 0, SLJIT_IMM, c | bit));
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return cc + length;
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}
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jump[0] = CMP(SLJIT_EQUAL, TMP1, 0, SLJIT_IMM, c);
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add_jump(compiler, backtracks, CMP(SLJIT_NOT_EQUAL, TMP1, 0, SLJIT_IMM, oc));
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JUMPHERE(jump[0]);
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SLJIT_ASSERT(!is_powerof2(c ^ oc));
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if (sljit_has_cpu_feature(SLJIT_HAS_CMOV))
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{
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OP2(SLJIT_SUB | SLJIT_SET_Z, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, oc);
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CMOV(SLJIT_EQUAL, TMP1, SLJIT_IMM, c);
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add_jump(compiler, backtracks, CMP(SLJIT_NOT_EQUAL, TMP1, 0, SLJIT_IMM, c));
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}
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else
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{
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jump[0] = CMP(SLJIT_EQUAL, TMP1, 0, SLJIT_IMM, c);
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add_jump(compiler, backtracks, CMP(SLJIT_NOT_EQUAL, TMP1, 0, SLJIT_IMM, oc));
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JUMPHERE(jump[0]);
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}
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return cc + length;
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case OP_NOT:
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@ -13732,10 +13749,10 @@ if (common->utfreadchar != NULL)
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set_jumps(common->utfreadchar, LABEL());
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do_utfreadchar(common);
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}
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if (common->utfreadchar_invalid_precise != NULL)
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if (common->utfreadnewline_invalid != NULL)
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{
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set_jumps(common->utfreadchar_invalid_precise, LABEL());
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do_utfreadchar_invalid_precise(common);
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set_jumps(common->utfreadnewline_invalid, LABEL());
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do_utfreadnewline_invalid(common);
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}
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if (common->utfreadtype8 != NULL)
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{
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@ -1757,7 +1757,7 @@ static int regression_tests(void)
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#if defined SUPPORT_UNICODE && (defined SUPPORT_PCRE2_8 || defined SUPPORT_PCRE2_16)
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static int check_invalid_utf_result(int pattern_index, char *type, int result,
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static int check_invalid_utf_result(int pattern_index, const char *type, int result,
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int match_start, int match_end, PCRE2_SIZE *ovector)
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{
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if (match_start < 0) {
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@ -1926,6 +1926,15 @@ static struct invalid_utf8_regression_test_case invalid_utf8_regression_test_cas
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{ PCRE2_UTF | PCRE2_MULTILINE, CI, 1, 0, 0, 5, 6, { "^\\W", NULL }, " \xf2\xbf\xbf\x0a#"},
|
||||
{ PCRE2_UTF | PCRE2_MULTILINE, CI, 1, 0, 0, 3, 4, { "^\\W", NULL }, " \xef\x0a#"},
|
||||
{ PCRE2_UTF | PCRE2_MULTILINE, CI, 1, 0, 0, 4, 5, { "^\\W", NULL }, " \xef\xbf\x0a#"},
|
||||
{ PCRE2_UTF | PCRE2_MULTILINE, CI, 1, 0, 0, 5, 6, { "^\\W", NULL }, " \x85#\xc2\x85#"},
|
||||
{ PCRE2_UTF | PCRE2_MULTILINE, CI, 1, 0, 0, 7, 8, { "^\\W", NULL }, " \xe2\x80\xf8\xe2\x80\xa8#"},
|
||||
|
||||
{ PCRE2_UTF | PCRE2_FIRSTLINE, CI, 0, 0, 0, -1, -1, { "#", NULL }, "\xe2\x80\xf8\xe2\x80\xa8#"},
|
||||
{ PCRE2_UTF | PCRE2_FIRSTLINE, CI, 0, 0, 0, 3, 4, { "#", NULL }, "\xe2\x80\xf8#\xe2\x80\xa8#"},
|
||||
{ PCRE2_UTF | PCRE2_FIRSTLINE, CI, 0, 0, 0, -1, -1, { "#", NULL }, "abcd\xc2\x85#"},
|
||||
{ PCRE2_UTF | PCRE2_FIRSTLINE, CI, 0, 0, 0, 1, 2, { "#", NULL }, "\x85#\xc2\x85#"},
|
||||
{ PCRE2_UTF | PCRE2_FIRSTLINE, CI, 0, 0, 0, 5, 6, { "#", NULL }, "\xef,\x80,\xf8#\x0a"},
|
||||
{ PCRE2_UTF | PCRE2_FIRSTLINE, CI, 0, 0, 0, -1, -1, { "#", NULL }, "\xef,\x80,\xf8\x0a#"},
|
||||
|
||||
{ 0, 0, 0, 0, 0, 0, 0, { NULL, NULL }, NULL }
|
||||
};
|
||||
|
|
|
|||
Loading…
Reference in New Issue