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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /js/src/vm/BytecodeIterator.h | |
parent | Initial commit. (diff) | |
download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'js/src/vm/BytecodeIterator.h')
-rw-r--r-- | js/src/vm/BytecodeIterator.h | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/js/src/vm/BytecodeIterator.h b/js/src/vm/BytecodeIterator.h new file mode 100644 index 0000000000..afc84e0451 --- /dev/null +++ b/js/src/vm/BytecodeIterator.h @@ -0,0 +1,85 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- + * vim: set ts=8 sts=2 et sw=2 tw=80: + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef vm_BytecodeIterator_h +#define vm_BytecodeIterator_h + +#include "vm/BytecodeLocation.h" + +namespace js { + +class BytecodeIterator { + BytecodeLocation current_; + + public: + inline explicit BytecodeIterator(const JSScript* script); + + explicit BytecodeIterator(BytecodeLocation loc) : current_(loc) {} + + BytecodeIterator& operator=(const BytecodeIterator&) = default; + + bool operator==(const BytecodeIterator& other) const { + return other.current_ == current_; + } + + bool operator!=(const BytecodeIterator& other) const { + return !(other.current_ == current_); + } + + const BytecodeLocation& operator*() const { return current_; } + + const BytecodeLocation* operator->() const { return ¤t_; } + + // Pre-increment + BytecodeIterator& operator++() { + current_ = current_.next(); + return *this; + } + + // Post-increment + BytecodeIterator operator++(int) { + BytecodeIterator previous(*this); + current_ = current_.next(); + return previous; + } +}; + +// Given a JSScript, allow the construction of a range based for-loop +// that will visit all script locations in that script. +class AllBytecodesIterable { + const JSScript* script_; + + public: + explicit AllBytecodesIterable(const JSScript* script) : script_(script) {} + + BytecodeIterator begin(); + BytecodeIterator end(); +}; + +// Construct a range based iterator that will visit all bytecode locations +// between two given bytecode locations. +// `beginLoc_` is the bytecode location where the iterator will start, and +// `endLoc_` is the bytecode location where the iterator will end. +class BytecodeLocationRange { + BytecodeLocation beginLoc_; + BytecodeLocation endLoc_; + + public: + explicit BytecodeLocationRange(BytecodeLocation beginLoc, + BytecodeLocation endLoc) + : beginLoc_(beginLoc), endLoc_(endLoc) { +#ifdef DEBUG + MOZ_ASSERT(beginLoc.hasSameScript(endLoc)); +#endif + } + + BytecodeIterator begin(); + BytecodeIterator end(); +}; + +} // namespace js + +#endif |