Adding upstream version 86.0.1.upstream/86.0.1upstream

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

1 files changed, 198 insertions, 0 deletions

diff --git a/js/src/wasm/WasmSerialize.h b/js/src/wasm/WasmSerialize.h
new file mode 100644
index 0000000000..5c86f617a0
--- /dev/null
+++ b/js/src/wasm/WasmSerialize.h
@@ -0,0 +1,198 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: set ts=8 sts=2 et sw=2 tw=80:
+ *
+ * Copyright 2015 Mozilla Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef wasm_serialize_h
+#define wasm_serialize_h
+
+#include <type_traits>
+
+#include "js/Vector.h"
+
+namespace js {
+namespace wasm {
+
+// Factor out common serialization, cloning and about:memory size-computation
+// functions for reuse when serializing wasm and asm.js modules.
+
+static inline uint8_t* WriteBytes(uint8_t* dst, const void* src,
+                                  size_t nbytes) {
+  if (nbytes) {
+    memcpy(dst, src, nbytes);
+  }
+  return dst + nbytes;
+}
+
+static inline const uint8_t* ReadBytes(const uint8_t* src, void* dst,
+                                       size_t nbytes) {
+  if (nbytes) {
+    memcpy(dst, src, nbytes);
+  }
+  return src + nbytes;
+}
+
+static inline const uint8_t* ReadBytesChecked(const uint8_t* src,
+                                              size_t* remain, void* dst,
+                                              size_t nbytes) {
+  if (*remain < nbytes) {
+    return nullptr;
+  }
+  memcpy(dst, src, nbytes);
+  *remain -= nbytes;
+  return src + nbytes;
+}
+
+template <class T>
+static inline uint8_t* WriteScalar(uint8_t* dst, T t) {
+  memcpy(dst, &t, sizeof(t));
+  return dst + sizeof(t);
+}
+
+template <class T>
+static inline const uint8_t* ReadScalar(const uint8_t* src, T* dst) {
+  memcpy(dst, src, sizeof(*dst));
+  return src + sizeof(*dst);
+}
+
+template <class T>
+static inline const uint8_t* ReadScalarChecked(const uint8_t* src,
+                                               size_t* remain, T* dst) {
+  if (*remain < sizeof(*dst)) {
+    return nullptr;
+  }
+  memcpy(dst, src, sizeof(*dst));
+  *remain -= sizeof(*dst);
+  return src + sizeof(*dst);
+}
+
+template <class T, size_t N>
+static inline size_t SerializedVectorSize(
+    const mozilla::Vector<T, N, SystemAllocPolicy>& vec) {
+  size_t size = sizeof(uint32_t);
+  for (size_t i = 0; i < vec.length(); i++) {
+    size += vec[i].serializedSize();
+  }
+  return size;
+}
+
+template <class T, size_t N>
+static inline uint8_t* SerializeVector(
+    uint8_t* cursor, const mozilla::Vector<T, N, SystemAllocPolicy>& vec) {
+  cursor = WriteScalar<uint32_t>(cursor, vec.length());
+  for (size_t i = 0; i < vec.length(); i++) {
+    cursor = vec[i].serialize(cursor);
+  }
+  return cursor;
+}
+
+template <class T, size_t N>
+static inline const uint8_t* DeserializeVector(
+    const uint8_t* cursor, mozilla::Vector<T, N, SystemAllocPolicy>* vec) {
+  uint32_t length;
+  cursor = ReadScalar<uint32_t>(cursor, &length);
+  if (!vec->resize(length)) {
+    return nullptr;
+  }
+  for (size_t i = 0; i < vec->length(); i++) {
+    if (!(cursor = (*vec)[i].deserialize(cursor))) {
+      return nullptr;
+    }
+  }
+  return cursor;
+}
+
+template <class T, size_t N>
+static inline size_t SizeOfVectorExcludingThis(
+    const mozilla::Vector<T, N, SystemAllocPolicy>& vec,
+    MallocSizeOf mallocSizeOf) {
+  size_t size = vec.sizeOfExcludingThis(mallocSizeOf);
+  for (const T& t : vec) {
+    size += t.sizeOfExcludingThis(mallocSizeOf);
+  }
+  return size;
+}
+
+template <class T, size_t N>
+static inline size_t SerializedPodVectorSize(
+    const mozilla::Vector<T, N, SystemAllocPolicy>& vec) {
+  return sizeof(uint32_t) + vec.length() * sizeof(T);
+}
+
+template <class T, size_t N>
+static inline uint8_t* SerializePodVector(
+    uint8_t* cursor, const mozilla::Vector<T, N, SystemAllocPolicy>& vec) {
+  // This binary format must not change without taking into consideration the
+  // constraints in Assumptions::serialize.
+
+  cursor = WriteScalar<uint32_t>(cursor, vec.length());
+  cursor = WriteBytes(cursor, vec.begin(), vec.length() * sizeof(T));
+  return cursor;
+}
+
+template <class T, size_t N>
+static inline const uint8_t* DeserializePodVector(
+    const uint8_t* cursor, mozilla::Vector<T, N, SystemAllocPolicy>* vec) {
+  uint32_t length;
+  cursor = ReadScalar<uint32_t>(cursor, &length);
+  if (!vec->initLengthUninitialized(length)) {
+    return nullptr;
+  }
+  cursor = ReadBytes(cursor, vec->begin(), length * sizeof(T));
+  return cursor;
+}
+
+template <class T, size_t N>
+static inline const uint8_t* DeserializePodVectorChecked(
+    const uint8_t* cursor, size_t* remain,
+    mozilla::Vector<T, N, SystemAllocPolicy>* vec) {
+  uint32_t length;
+  cursor = ReadScalarChecked<uint32_t>(cursor, remain, &length);
+  if (!cursor || !vec->initLengthUninitialized(length)) {
+    return nullptr;
+  }
+  cursor = ReadBytesChecked(cursor, remain, vec->begin(), length * sizeof(T));
+  return cursor;
+}
+
+template <class T>
+inline size_t SerializableRefPtr<T>::serializedSize() const {
+  return (*this)->serializedSize();
+}
+
+template <class T>
+inline uint8_t* SerializableRefPtr<T>::serialize(uint8_t* cursor) const {
+  return (*this)->serialize(cursor);
+}
+
+template <class T>
+inline const uint8_t* SerializableRefPtr<T>::deserialize(
+    const uint8_t* cursor) {
+  auto* t = js_new<std::remove_const_t<T>>();
+  *this = t;
+  return t->deserialize(cursor);
+}
+
+template <class T>
+inline size_t SerializableRefPtr<T>::sizeOfExcludingThis(
+    mozilla::MallocSizeOf mallocSizeOf) const {
+  return (*this)->sizeOfExcludingThis(mallocSizeOf);
+}
+
+}  // namespace wasm
+}  // namespace js
+
+#endif  // wasm_serialize_h