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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
commit36d22d82aa202bb199967e9512281e9a53db42c9 (patch)
tree105e8c98ddea1c1e4784a60a5a6410fa416be2de /js/src/irregexp/imported/regexp-bytecodes.h
parentInitial commit. (diff)
downloadfirefox-esr-upstream.tar.xz
firefox-esr-upstream.zip
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--js/src/irregexp/imported/regexp-bytecodes.h257
1 files changed, 257 insertions, 0 deletions
diff --git a/js/src/irregexp/imported/regexp-bytecodes.h b/js/src/irregexp/imported/regexp-bytecodes.h
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+++ b/js/src/irregexp/imported/regexp-bytecodes.h
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+// Copyright 2011 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef V8_REGEXP_REGEXP_BYTECODES_H_
+#define V8_REGEXP_REGEXP_BYTECODES_H_
+
+#include "irregexp/RegExpShim.h"
+
+namespace v8 {
+namespace internal {
+
+// Maximum number of bytecodes that will be used (next power of 2 of actually
+// defined bytecodes).
+// All slots between the last actually defined bytecode and maximum id will be
+// filled with BREAKs, indicating an invalid operation. This way using
+// BYTECODE_MASK guarantees no OOB access to the dispatch table.
+constexpr int kRegExpPaddedBytecodeCount = 1 << 6;
+constexpr int BYTECODE_MASK = kRegExpPaddedBytecodeCount - 1;
+// The first argument is packed in with the byte code in one word, but so it
+// has 24 bits, but it can be positive and negative so only use 23 bits for
+// positive values.
+const unsigned int MAX_FIRST_ARG = 0x7fffffu;
+const int BYTECODE_SHIFT = 8;
+static_assert(1 << BYTECODE_SHIFT > BYTECODE_MASK);
+
+// The list of bytecodes, in format: V(Name, Code, ByteLength).
+// TODO(pthier): Argument offsets of bytecodes should be easily accessible by
+// name or at least by position.
+// TODO(jgruber): More precise types (e.g. int32/uint32 instead of value32).
+#define BYTECODE_ITERATOR(V) \
+ V(BREAK, 0, 4) /* bc8 */ \
+ V(PUSH_CP, 1, 4) /* bc8 pad24 */ \
+ V(PUSH_BT, 2, 8) /* bc8 pad24 offset32 */ \
+ V(PUSH_REGISTER, 3, 4) /* bc8 reg_idx24 */ \
+ V(SET_REGISTER_TO_CP, 4, 8) /* bc8 reg_idx24 offset32 */ \
+ V(SET_CP_TO_REGISTER, 5, 4) /* bc8 reg_idx24 */ \
+ V(SET_REGISTER_TO_SP, 6, 4) /* bc8 reg_idx24 */ \
+ V(SET_SP_TO_REGISTER, 7, 4) /* bc8 reg_idx24 */ \
+ V(SET_REGISTER, 8, 8) /* bc8 reg_idx24 value32 */ \
+ V(ADVANCE_REGISTER, 9, 8) /* bc8 reg_idx24 value32 */ \
+ V(POP_CP, 10, 4) /* bc8 pad24 */ \
+ V(POP_BT, 11, 4) /* bc8 pad24 */ \
+ V(POP_REGISTER, 12, 4) /* bc8 reg_idx24 */ \
+ V(FAIL, 13, 4) /* bc8 pad24 */ \
+ V(SUCCEED, 14, 4) /* bc8 pad24 */ \
+ V(ADVANCE_CP, 15, 4) /* bc8 offset24 */ \
+ /* Jump to another bytecode given its offset. */ \
+ /* Bit Layout: */ \
+ /* 0x00 - 0x07: 0x10 (fixed) Bytecode */ \
+ /* 0x08 - 0x1F: 0x00 (unused) Padding */ \
+ /* 0x20 - 0x3F: Address of bytecode to jump to */ \
+ V(GOTO, 16, 8) /* bc8 pad24 addr32 */ \
+ /* Check if offset is in range and load character at given offset. */ \
+ /* Bit Layout: */ \
+ /* 0x00 - 0x07: 0x11 (fixed) Bytecode */ \
+ /* 0x08 - 0x1F: Offset from current position */ \
+ /* 0x20 - 0x3F: Address of bytecode when load is out of range */ \
+ V(LOAD_CURRENT_CHAR, 17, 8) /* bc8 offset24 addr32 */ \
+ /* Load character at given offset without range checks. */ \
+ /* Bit Layout: */ \
+ /* 0x00 - 0x07: 0x12 (fixed) Bytecode */ \
+ /* 0x08 - 0x1F: Offset from current position */ \
+ V(LOAD_CURRENT_CHAR_UNCHECKED, 18, 4) /* bc8 offset24 */ \
+ V(LOAD_2_CURRENT_CHARS, 19, 8) /* bc8 offset24 addr32 */ \
+ V(LOAD_2_CURRENT_CHARS_UNCHECKED, 20, 4) /* bc8 offset24 */ \
+ V(LOAD_4_CURRENT_CHARS, 21, 8) /* bc8 offset24 addr32 */ \
+ V(LOAD_4_CURRENT_CHARS_UNCHECKED, 22, 4) /* bc8 offset24 */ \
+ V(CHECK_4_CHARS, 23, 12) /* bc8 pad24 uint32 addr32 */ \
+ /* Check if current character is equal to a given character */ \
+ /* Bit Layout: */ \
+ /* 0x00 - 0x07: 0x19 (fixed) Bytecode */ \
+ /* 0x08 - 0x0F: 0x00 (unused) Padding */ \
+ /* 0x10 - 0x1F: Character to check */ \
+ /* 0x20 - 0x3F: Address of bytecode when matched */ \
+ V(CHECK_CHAR, 24, 8) /* bc8 pad8 uint16 addr32 */ \
+ V(CHECK_NOT_4_CHARS, 25, 12) /* bc8 pad24 uint32 addr32 */ \
+ V(CHECK_NOT_CHAR, 26, 8) /* bc8 pad8 uint16 addr32 */ \
+ V(AND_CHECK_4_CHARS, 27, 16) /* bc8 pad24 uint32 uint32 addr32 */ \
+ /* Checks if the current character combined with mask (bitwise and) */ \
+ /* matches a character (e.g. used when two characters in a disjunction */ \
+ /* differ by only a single bit */ \
+ /* Bit Layout: */ \
+ /* 0x00 - 0x07: 0x1c (fixed) Bytecode */ \
+ /* 0x08 - 0x0F: 0x00 (unused) Padding */ \
+ /* 0x10 - 0x1F: Character to match against (after mask aplied) */ \
+ /* 0x20 - 0x3F: Bitmask bitwise and combined with current character */ \
+ /* 0x40 - 0x5F: Address of bytecode when matched */ \
+ V(AND_CHECK_CHAR, 28, 12) /* bc8 pad8 uint16 uint32 addr32 */ \
+ V(AND_CHECK_NOT_4_CHARS, 29, 16) /* bc8 pad24 uint32 uint32 addr32 */ \
+ V(AND_CHECK_NOT_CHAR, 30, 12) /* bc8 pad8 uint16 uint32 addr32 */ \
+ V(MINUS_AND_CHECK_NOT_CHAR, 31, \
+ 12) /* bc8 pad8 base::uc16 base::uc16 base::uc16 addr32 */ \
+ V(CHECK_CHAR_IN_RANGE, 32, 12) /* bc8 pad24 base::uc16 base::uc16 addr32 */ \
+ V(CHECK_CHAR_NOT_IN_RANGE, 33, \
+ 12) /* bc8 pad24 base::uc16 base::uc16 addr32 */ \
+ /* Checks if the current character matches any of the characters encoded */ \
+ /* in a bit table. Similar to/inspired by boyer moore string search */ \
+ /* Bit Layout: */ \
+ /* 0x00 - 0x07: 0x22 (fixed) Bytecode */ \
+ /* 0x08 - 0x1F: 0x00 (unused) Padding */ \
+ /* 0x20 - 0x3F: Address of bytecode when bit is set */ \
+ /* 0x40 - 0xBF: Bit table */ \
+ V(CHECK_BIT_IN_TABLE, 34, 24) /* bc8 pad24 addr32 bits128 */ \
+ V(CHECK_LT, 35, 8) /* bc8 pad8 base::uc16 addr32 */ \
+ V(CHECK_GT, 36, 8) /* bc8 pad8 base::uc16 addr32 */ \
+ V(CHECK_NOT_BACK_REF, 37, 8) /* bc8 reg_idx24 addr32 */ \
+ V(CHECK_NOT_BACK_REF_NO_CASE, 38, 8) /* bc8 reg_idx24 addr32 */ \
+ V(CHECK_NOT_BACK_REF_NO_CASE_UNICODE, 39, 8) \
+ V(CHECK_NOT_BACK_REF_BACKWARD, 40, 8) /* bc8 reg_idx24 addr32 */ \
+ V(CHECK_NOT_BACK_REF_NO_CASE_BACKWARD, 41, 8) /* bc8 reg_idx24 addr32 */ \
+ V(CHECK_NOT_BACK_REF_NO_CASE_UNICODE_BACKWARD, 42, 8) \
+ V(CHECK_NOT_REGS_EQUAL, 43, 12) /* bc8 regidx24 reg_idx32 addr32 */ \
+ V(CHECK_REGISTER_LT, 44, 12) /* bc8 reg_idx24 value32 addr32 */ \
+ V(CHECK_REGISTER_GE, 45, 12) /* bc8 reg_idx24 value32 addr32 */ \
+ V(CHECK_REGISTER_EQ_POS, 46, 8) /* bc8 reg_idx24 addr32 */ \
+ V(CHECK_AT_START, 47, 8) /* bc8 pad24 addr32 */ \
+ V(CHECK_NOT_AT_START, 48, 8) /* bc8 offset24 addr32 */ \
+ /* Checks if the current position matches top of backtrack stack */ \
+ /* Bit Layout: */ \
+ /* 0x00 - 0x07: 0x31 (fixed) Bytecode */ \
+ /* 0x08 - 0x1F: 0x00 (unused) Padding */ \
+ /* 0x20 - 0x3F: Address of bytecode when current matches tos */ \
+ V(CHECK_GREEDY, 49, 8) /* bc8 pad24 addr32 */ \
+ /* Advance character pointer by given offset and jump to another bytecode.*/ \
+ /* Bit Layout: */ \
+ /* 0x00 - 0x07: 0x32 (fixed) Bytecode */ \
+ /* 0x08 - 0x1F: Number of characters to advance */ \
+ /* 0x20 - 0x3F: Address of bytecode to jump to */ \
+ V(ADVANCE_CP_AND_GOTO, 50, 8) /* bc8 offset24 addr32 */ \
+ V(SET_CURRENT_POSITION_FROM_END, 51, 4) /* bc8 idx24 */ \
+ /* Checks if current position + given offset is in range. */ \
+ /* Bit Layout: */ \
+ /* 0x00 - 0x07: 0x34 (fixed) Bytecode */ \
+ /* 0x08 - 0x1F: Offset from current position */ \
+ /* 0x20 - 0x3F: Address of bytecode when position is out of range */ \
+ V(CHECK_CURRENT_POSITION, 52, 8) /* bc8 idx24 addr32 */ \
+ /* Combination of: */ \
+ /* LOAD_CURRENT_CHAR, CHECK_BIT_IN_TABLE and ADVANCE_CP_AND_GOTO */ \
+ /* Emitted by RegExpBytecodePeepholeOptimization. */ \
+ /* Bit Layout: */ \
+ /* 0x00 - 0x07 0x35 (fixed) Bytecode */ \
+ /* 0x08 - 0x1F Load character offset from current position */ \
+ /* 0x20 - 0x3F Number of characters to advance */ \
+ /* 0x40 - 0xBF Bit Table */ \
+ /* 0xC0 - 0xDF Address of bytecode when character is matched */ \
+ /* 0xE0 - 0xFF Address of bytecode when no match */ \
+ V(SKIP_UNTIL_BIT_IN_TABLE, 53, 32) \
+ /* Combination of: */ \
+ /* CHECK_CURRENT_POSITION, LOAD_CURRENT_CHAR_UNCHECKED, AND_CHECK_CHAR */ \
+ /* and ADVANCE_CP_AND_GOTO */ \
+ /* Emitted by RegExpBytecodePeepholeOptimization. */ \
+ /* Bit Layout: */ \
+ /* 0x00 - 0x07 0x36 (fixed) Bytecode */ \
+ /* 0x08 - 0x1F Load character offset from current position */ \
+ /* 0x20 - 0x2F Number of characters to advance */ \
+ /* 0x30 - 0x3F Character to match against (after mask applied) */ \
+ /* 0x40 - 0x5F: Bitmask bitwise and combined with current character */ \
+ /* 0x60 - 0x7F Minimum number of characters this pattern consumes */ \
+ /* 0x80 - 0x9F Address of bytecode when character is matched */ \
+ /* 0xA0 - 0xBF Address of bytecode when no match */ \
+ V(SKIP_UNTIL_CHAR_AND, 54, 24) \
+ /* Combination of: */ \
+ /* LOAD_CURRENT_CHAR, CHECK_CHAR and ADVANCE_CP_AND_GOTO */ \
+ /* Emitted by RegExpBytecodePeepholeOptimization. */ \
+ /* Bit Layout: */ \
+ /* 0x00 - 0x07 0x37 (fixed) Bytecode */ \
+ /* 0x08 - 0x1F Load character offset from current position */ \
+ /* 0x20 - 0x2F Number of characters to advance */ \
+ /* 0x30 - 0x3F Character to match */ \
+ /* 0x40 - 0x5F Address of bytecode when character is matched */ \
+ /* 0x60 - 0x7F Address of bytecode when no match */ \
+ V(SKIP_UNTIL_CHAR, 55, 16) \
+ /* Combination of: */ \
+ /* CHECK_CURRENT_POSITION, LOAD_CURRENT_CHAR_UNCHECKED, CHECK_CHAR */ \
+ /* and ADVANCE_CP_AND_GOTO */ \
+ /* Emitted by RegExpBytecodePeepholeOptimization. */ \
+ /* Bit Layout: */ \
+ /* 0x00 - 0x07 0x38 (fixed) Bytecode */ \
+ /* 0x08 - 0x1F Load character offset from current position */ \
+ /* 0x20 - 0x2F Number of characters to advance */ \
+ /* 0x30 - 0x3F Character to match */ \
+ /* 0x40 - 0x5F Minimum number of characters this pattern consumes */ \
+ /* 0x60 - 0x7F Address of bytecode when character is matched */ \
+ /* 0x80 - 0x9F Address of bytecode when no match */ \
+ V(SKIP_UNTIL_CHAR_POS_CHECKED, 56, 20) \
+ /* Combination of: */ \
+ /* LOAD_CURRENT_CHAR, CHECK_CHAR, CHECK_CHAR and ADVANCE_CP_AND_GOTO */ \
+ /* Emitted by RegExpBytecodePeepholeOptimization. */ \
+ /* Bit Layout: */ \
+ /* 0x00 - 0x07 0x39 (fixed) Bytecode */ \
+ /* 0x08 - 0x1F Load character offset from current position */ \
+ /* 0x20 - 0x3F Number of characters to advance */ \
+ /* 0x40 - 0x4F Character to match */ \
+ /* 0x50 - 0x5F Other Character to match */ \
+ /* 0x60 - 0x7F Address of bytecode when either character is matched */ \
+ /* 0x80 - 0x9F Address of bytecode when no match */ \
+ V(SKIP_UNTIL_CHAR_OR_CHAR, 57, 20) \
+ /* Combination of: */ \
+ /* LOAD_CURRENT_CHAR, CHECK_GT, CHECK_BIT_IN_TABLE, GOTO and */ \
+ /* and ADVANCE_CP_AND_GOTO */ \
+ /* Emitted by RegExpBytecodePeepholeOptimization. */ \
+ /* Bit Layout: */ \
+ /* 0x00 - 0x07 0x3A (fixed) Bytecode */ \
+ /* 0x08 - 0x1F Load character offset from current position */ \
+ /* 0x20 - 0x2F Number of characters to advance */ \
+ /* 0x30 - 0x3F Character to check if it is less than current char */ \
+ /* 0x40 - 0xBF Bit Table */ \
+ /* 0xC0 - 0xDF Address of bytecode when character is matched */ \
+ /* 0xE0 - 0xFF Address of bytecode when no match */ \
+ V(SKIP_UNTIL_GT_OR_NOT_BIT_IN_TABLE, 58, 32)
+
+#define COUNT(...) +1
+static constexpr int kRegExpBytecodeCount = BYTECODE_ITERATOR(COUNT);
+#undef COUNT
+
+// Just making sure we assigned values above properly. They should be
+// contiguous, strictly increasing, and start at 0.
+// TODO(jgruber): Do not explicitly assign values, instead generate them
+// implicitly from the list order.
+static_assert(kRegExpBytecodeCount == 59);
+
+#define DECLARE_BYTECODES(name, code, length) \
+ static constexpr int BC_##name = code;
+BYTECODE_ITERATOR(DECLARE_BYTECODES)
+#undef DECLARE_BYTECODES
+
+static constexpr int kRegExpBytecodeLengths[] = {
+#define DECLARE_BYTECODE_LENGTH(name, code, length) length,
+ BYTECODE_ITERATOR(DECLARE_BYTECODE_LENGTH)
+#undef DECLARE_BYTECODE_LENGTH
+};
+
+inline constexpr int RegExpBytecodeLength(int bytecode) {
+ DCHECK(base::IsInRange(bytecode, 0, kRegExpBytecodeCount - 1));
+ return kRegExpBytecodeLengths[bytecode];
+}
+
+static constexpr const char* const kRegExpBytecodeNames[] = {
+#define DECLARE_BYTECODE_NAME(name, ...) #name,
+ BYTECODE_ITERATOR(DECLARE_BYTECODE_NAME)
+#undef DECLARE_BYTECODE_NAME
+};
+
+inline constexpr const char* RegExpBytecodeName(int bytecode) {
+ DCHECK(base::IsInRange(bytecode, 0, kRegExpBytecodeCount - 1));
+ return kRegExpBytecodeNames[bytecode];
+}
+
+void RegExpBytecodeDisassembleSingle(const byte* code_base, const byte* pc);
+void RegExpBytecodeDisassemble(const byte* code_base, int length,
+ const char* pattern);
+
+} // namespace internal
+} // namespace v8
+
+#endif // V8_REGEXP_REGEXP_BYTECODES_H_