Correctly pointer-align code cache payload.
R=jochen@chromium.org Review URL: https://codereview.chromium.org/912763002 Cr-Commit-Position: refs/heads/master@{#26541}
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@ -2475,7 +2475,7 @@ SnapshotData::SnapshotData(const SnapshotByteSink& sink,
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// Set header values.
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SetHeaderValue(kCheckSumOffset, Version::Hash());
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SetHeaderValue(kReservationsOffset, reservations.length());
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SetHeaderValue(kNumReservationsOffset, reservations.length());
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SetHeaderValue(kPayloadLengthOffset, payload.length());
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// Copy reservation chunk sizes.
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@ -2496,12 +2496,12 @@ bool SnapshotData::IsSane() {
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Vector<const SerializedData::Reservation> SnapshotData::Reservations() const {
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return Vector<const Reservation>(
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reinterpret_cast<const Reservation*>(data_ + kHeaderSize),
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GetHeaderValue(kReservationsOffset));
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GetHeaderValue(kNumReservationsOffset));
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}
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Vector<const byte> SnapshotData::Payload() const {
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int reservations_size = GetHeaderValue(kReservationsOffset) * kInt32Size;
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int reservations_size = GetHeaderValue(kNumReservationsOffset) * kInt32Size;
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const byte* payload = data_ + kHeaderSize + reservations_size;
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int length = GetHeaderValue(kPayloadLengthOffset);
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DCHECK_EQ(data_ + size_, payload + length);
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@ -2556,7 +2556,9 @@ SerializedCodeData::SerializedCodeData(const List<byte>& payload,
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int reservation_size = reservations.length() * kInt32Size;
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int num_stub_keys = stub_keys->length();
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int stub_keys_size = stub_keys->length() * kInt32Size;
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int size = kHeaderSize + reservation_size + stub_keys_size + payload.length();
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int payload_offset = kHeaderSize + reservation_size + stub_keys_size;
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int padded_payload_offset = POINTER_SIZE_ALIGN(payload_offset);
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int size = padded_payload_offset + payload.length();
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// Allocate backing store and create result data.
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AllocateData(size);
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@ -2568,7 +2570,7 @@ SerializedCodeData::SerializedCodeData(const List<byte>& payload,
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static_cast<uint32_t>(CpuFeatures::SupportedFeatures()));
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SetHeaderValue(kFlagHashOffset, FlagList::Hash());
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SetHeaderValue(kNumInternalizedStringsOffset, cs.num_internalized_strings());
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SetHeaderValue(kReservationsOffset, reservations.length());
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SetHeaderValue(kNumReservationsOffset, reservations.length());
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SetHeaderValue(kNumCodeStubKeysOffset, num_stub_keys);
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SetHeaderValue(kPayloadLengthOffset, payload.length());
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@ -2584,9 +2586,11 @@ SerializedCodeData::SerializedCodeData(const List<byte>& payload,
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CopyBytes(data_ + kHeaderSize + reservation_size,
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reinterpret_cast<byte*>(stub_keys->begin()), stub_keys_size);
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memset(data_ + payload_offset, 0, padded_payload_offset - payload_offset);
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// Copy serialized data.
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CopyBytes(data_ + kHeaderSize + reservation_size + stub_keys_size,
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payload.begin(), static_cast<size_t>(payload.length()));
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CopyBytes(data_ + padded_payload_offset, payload.begin(),
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static_cast<size_t>(payload.length()));
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}
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@ -2616,15 +2620,17 @@ Vector<const SerializedData::Reservation> SerializedCodeData::Reservations()
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const {
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return Vector<const Reservation>(
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reinterpret_cast<const Reservation*>(data_ + kHeaderSize),
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GetHeaderValue(kReservationsOffset));
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GetHeaderValue(kNumReservationsOffset));
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}
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Vector<const byte> SerializedCodeData::Payload() const {
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int reservations_size = GetHeaderValue(kReservationsOffset) * kInt32Size;
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int reservations_size = GetHeaderValue(kNumReservationsOffset) * kInt32Size;
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int code_stubs_size = GetHeaderValue(kNumCodeStubKeysOffset) * kInt32Size;
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const byte* payload =
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data_ + kHeaderSize + reservations_size + code_stubs_size;
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int payload_offset = kHeaderSize + reservations_size + code_stubs_size;
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int padded_payload_offset = POINTER_SIZE_ALIGN(payload_offset);
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const byte* payload = data_ + padded_payload_offset;
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DCHECK(IsAligned(reinterpret_cast<intptr_t>(payload), kPointerAlignment));
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int length = GetHeaderValue(kPayloadLengthOffset);
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DCHECK_EQ(data_ + size_, payload + length);
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return Vector<const byte>(payload, length);
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@ -2636,7 +2642,7 @@ int SerializedCodeData::NumInternalizedStrings() const {
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}
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Vector<const uint32_t> SerializedCodeData::CodeStubKeys() const {
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int reservations_size = GetHeaderValue(kReservationsOffset) * kInt32Size;
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int reservations_size = GetHeaderValue(kNumReservationsOffset) * kInt32Size;
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const byte* start = data_ + kHeaderSize + reservations_size;
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return Vector<const uint32_t>(reinterpret_cast<const uint32_t*>(start),
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GetHeaderValue(kNumCodeStubKeysOffset));
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@ -501,12 +501,13 @@ class SerializedData {
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protected:
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void SetHeaderValue(int offset, uint32_t value) {
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memcpy(reinterpret_cast<uint32_t*>(data_) + offset, &value, sizeof(value));
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uint32_t* address = reinterpret_cast<uint32_t*>(data_ + offset);
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memcpy(reinterpret_cast<uint32_t*>(address), &value, sizeof(value));
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}
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uint32_t GetHeaderValue(int offset) const {
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uint32_t value;
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memcpy(&value, reinterpret_cast<int*>(data_) + offset, sizeof(value));
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memcpy(&value, reinterpret_cast<int*>(data_ + offset), sizeof(value));
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return value;
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}
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@ -912,14 +913,16 @@ class SnapshotData : public SerializedData {
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private:
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bool IsSane();
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// The data header consists of int-sized entries:
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// The data header consists of uint32_t-sized entries:
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// [0] version hash
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// [1] number of reservation size entries
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// [2] payload length
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// ... reservations
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// ... serialized payload
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static const int kCheckSumOffset = 0;
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static const int kReservationsOffset = 1;
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static const int kPayloadLengthOffset = 2;
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static const int kHeaderSize = (kPayloadLengthOffset + 1) * kIntSize;
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static const int kNumReservationsOffset = kCheckSumOffset + kInt32Size;
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static const int kPayloadLengthOffset = kNumReservationsOffset + kInt32Size;
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static const int kHeaderSize = kPayloadLengthOffset + kInt32Size;
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};
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@ -957,7 +960,7 @@ class SerializedCodeData : public SerializedData {
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uint32_t SourceHash(String* source) const { return source->length(); }
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// The data header consists of int-sized entries:
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// The data header consists of uint32_t-sized entries:
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// [0] version hash
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// [1] source hash
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// [2] cpu features
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@ -966,18 +969,23 @@ class SerializedCodeData : public SerializedData {
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// [5] number of code stub keys
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// [6] number of reservation size entries
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// [7] payload length
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// [8] payload checksum part 1
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// [9] payload checksum part 2
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// ... reservations
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// ... code stub keys
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// ... serialized payload
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static const int kVersionHashOffset = 0;
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static const int kSourceHashOffset = 1;
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static const int kCpuFeaturesOffset = 2;
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static const int kFlagHashOffset = 3;
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static const int kNumInternalizedStringsOffset = 4;
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static const int kReservationsOffset = 5;
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static const int kNumCodeStubKeysOffset = 6;
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static const int kPayloadLengthOffset = 7;
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static const int kChecksum1Offset = 8;
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static const int kChecksum2Offset = 9;
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static const int kHeaderSize =
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POINTER_SIZE_ALIGN((kChecksum2Offset + 1) * kIntSize);
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static const int kSourceHashOffset = kVersionHashOffset + kInt32Size;
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static const int kCpuFeaturesOffset = kSourceHashOffset + kInt32Size;
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static const int kFlagHashOffset = kCpuFeaturesOffset + kInt32Size;
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static const int kNumInternalizedStringsOffset = kFlagHashOffset + kInt32Size;
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static const int kNumReservationsOffset =
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kNumInternalizedStringsOffset + kInt32Size;
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static const int kNumCodeStubKeysOffset = kNumReservationsOffset + kInt32Size;
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static const int kPayloadLengthOffset = kNumCodeStubKeysOffset + kInt32Size;
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static const int kChecksum1Offset = kPayloadLengthOffset + kInt32Size;
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static const int kChecksum2Offset = kChecksum1Offset + kInt32Size;
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static const int kHeaderSize = kChecksum2Offset + kInt32Size;
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};
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} } // namespace v8::internal
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