Adding upstream version 115.7.0esr.upstream/115.7.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 46 insertions, 0 deletions

diff --git a/js/src/irregexp/imported/regexp-bytecodes.cc b/js/src/irregexp/imported/regexp-bytecodes.cc
new file mode 100644
index 0000000000..829bea9180
--- /dev/null
+++ b/js/src/irregexp/imported/regexp-bytecodes.cc
@@ -0,0 +1,46 @@
+// 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 "irregexp/imported/regexp-bytecodes.h"
+
+#include <cctype>
+
+
+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