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// Copyright 2019 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.
#include "src/regexp/regexp-bytecodes.h"
#include <cctype>
#include "src/utils/utils.h"
namespace v8 {
namespace internal {
void RegExpBytecodeDisassembleSingle(const byte* code_base, const byte* pc) {
int bytecode = *reinterpret_cast<const int32_t*>(pc) & BYTECODE_MASK;
PrintF("%s", RegExpBytecodeName(bytecode));
// Args and the bytecode as hex.
for (int i = 0; i < RegExpBytecodeLength(bytecode); i++) {
PrintF(", %02x", pc[i]);
}
PrintF(" ");
// Args as ascii.
for (int i = 1; i < RegExpBytecodeLength(bytecode); i++) {
unsigned char b = pc[i];
PrintF("%c", std::isprint(b) ? b : '.');
}
PrintF("\n");
}
void RegExpBytecodeDisassemble(const byte* code_base, int length,
const char* pattern) {
PrintF("[generated bytecode for regexp pattern: '%s']\n", pattern);
ptrdiff_t offset = 0;
while (offset < length) {
const byte* const pc = code_base + offset;
PrintF("%p %4" V8PRIxPTRDIFF " ", pc, offset);
RegExpBytecodeDisassembleSingle(code_base, pc);
offset += RegExpBytecodeLength(*pc);
}
}
} // namespace internal
} // namespace v8
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