46 lines
1.2 KiB
C++
46 lines
1.2 KiB
C++
// Copyright 2019 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "regexp/regexp-bytecodes.h"
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#include <cctype>
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namespace v8 {
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namespace internal {
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void RegExpBytecodeDisassembleSingle(const byte* code_base, const byte* pc) {
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PrintF("%s", RegExpBytecodeName(*pc));
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// Args and the bytecode as hex.
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for (int i = 0; i < RegExpBytecodeLength(*pc); i++) {
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PrintF(", %02x", pc[i]);
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}
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PrintF(" ");
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// Args as ascii.
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for (int i = 1; i < RegExpBytecodeLength(*pc); i++) {
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unsigned char b = pc[i];
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PrintF("%c", std::isprint(b) ? b : '.');
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}
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PrintF("\n");
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}
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void RegExpBytecodeDisassemble(const byte* code_base, int length,
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const char* pattern) {
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PrintF("[generated bytecode for regexp pattern: '%s']\n", pattern);
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ptrdiff_t offset = 0;
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while (offset < length) {
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const byte* const pc = code_base + offset;
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PrintF("%p %4" V8PRIxPTRDIFF " ", pc, offset);
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RegExpBytecodeDisassembleSingle(code_base, pc);
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offset += RegExpBytecodeLength(*pc);
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}
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}
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} // namespace internal
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} // namespace v8
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