Handle<Value> CreateExternalArrayBuffer(int32_t length, uint8_t *data) {
Handle<Object> buffer = Object::New();
buffer->SetHiddenValue(String::New(kArrayBufferMarkerPropName), True());
Persistent<Object> persistent_array = Persistent<Object>::New(buffer);
persistent_array.MakeWeak(data, ExternalArrayWeakCallback);
persistent_array.MarkIndependent();
buffer->SetIndexedPropertiesToExternalArrayData(
data, v8::kExternalByteArray, length);
buffer->Set(String::New("byteLength"), Int32::New(length), ReadOnly);
buffer->Set(String::New("address"), Int32::New(reinterpret_cast<uint32_t>(data)), ReadOnly);
return buffer;
}
static gboolean
gum_script_event_sink_drain (gpointer user_data)
{
GumScriptEventSink * self = GUM_SCRIPT_EVENT_SINK (user_data);
gpointer buffer = NULL;
guint len, size;
if (self->core == NULL)
return FALSE;
len = self->queue->len;
size = len * sizeof (GumEvent);
if (len != 0)
{
buffer = g_memdup (self->queue->data, size);
gum_spinlock_acquire (&self->lock);
g_array_remove_range (self->queue, 0, len);
gum_spinlock_release (&self->lock);
}
if (buffer != NULL)
{
GHashTable * frequencies = NULL;
if (!self->on_call_summary.IsEmpty ())
{
frequencies = g_hash_table_new (NULL, NULL);
GumCallEvent * ev = static_cast<GumCallEvent *> (buffer);
for (guint i = 0; i != len; i++)
{
if (ev->type == GUM_CALL)
{
gsize count = GPOINTER_TO_SIZE (
g_hash_table_lookup (frequencies, ev->target));
count++;
g_hash_table_insert (frequencies,
ev->target, GSIZE_TO_POINTER (count));
}
ev++;
}
}
ScriptScope scope (self->core->script);
if (frequencies != NULL)
{
Handle<Object> summary = Object::New ();
GHashTableIter iter;
g_hash_table_iter_init (&iter, frequencies);
gpointer target, count;
while (g_hash_table_iter_next (&iter, &target, &count))
{
summary->Set (_gum_script_pointer_new (self->core, target),
Number::New (GPOINTER_TO_SIZE (count)), ReadOnly);
}
g_hash_table_unref (frequencies);
Handle<Value> argv[] = { summary };
self->on_call_summary->Call (self->on_call_summary, 1, argv);
}
if (!self->on_receive.IsEmpty ())
{
V8::AdjustAmountOfExternalAllocatedMemory (size);
Handle<Object> data = Object::New ();
data->Set (String::New ("length"), Int32::New (size), ReadOnly);
data->SetIndexedPropertiesToExternalArrayData (buffer,
kExternalUnsignedByteArray, size);
Persistent<Object> persistent_data = Persistent<Object>::New (data);
persistent_data.MakeWeak (buffer, gum_script_event_sink_data_free);
persistent_data.MarkIndependent ();
Handle<Value> argv[] = { data };
self->on_receive->Call (self->on_receive, 1, argv);
}
else
{
g_free (buffer);
}
}
return TRUE;
}
Handle<Value> CreateExternalArray(const Arguments& args,
ExternalArrayType type,
size_t element_size) {
TryCatch try_catch;
ASSERT_PIN(element_size == 1 || element_size == 2 ||
element_size == 4 || element_size == 8, "CreateExternalArray");
// Currently, only the following constructors are supported:
// TypedArray(unsigned long length)
// TypedArray(ArrayBuffer buffer,
// optional unsigned long byteOffset,
// optional unsigned long length)
Handle<Object> buffer;
int32_t length;
int32_t byteLength;
int32_t byteOffset;
int32_t bufferLength;
if (args.Length() == 0) {
return ThrowException(
String::New("Array constructor must have at least one parameter."));
}
if (args[0]->IsObject() &&
(!args[0]->ToObject()->GetHiddenValue(String::New(kArrayBufferMarkerPropName)).IsEmpty()) ||
(IS_BINARY(args[0]))) {
if (!args[0]->ToObject()->GetHiddenValue(String::New(kArrayBufferMarkerPropName)).IsEmpty()) {
buffer = args[0]->ToObject();
bufferLength = convertToUint(buffer->Get(String::New("byteLength")), &try_catch);
if (try_catch.HasCaught())
return try_catch.Exception();
} else {
buffer = CreateExternalArrayBuffer(args[0])->ToObject();
bufferLength = convertToUint(buffer->Get(String::New("byteLength")), &try_catch);
if (try_catch.HasCaught())
return try_catch.Exception();
}
if (args.Length() < 2 || args[1]->IsUndefined()) {
byteOffset = 0;
} else {
byteOffset = convertToUint(args[1], &try_catch);
if (try_catch.HasCaught()) return try_catch.Exception();
if (byteOffset > bufferLength) {
return ThrowException(String::New("byteOffset out of bounds"));
}
if (byteOffset % element_size != 0) {
return ThrowException(
String::New("byteOffset must be multiple of element_size"));
}
}
if (args.Length() < 3 || args[2]->IsUndefined()) {
byteLength = bufferLength - byteOffset;
length = byteLength / element_size;
if (byteLength % element_size != 0) {
return ThrowException(
String::New("buffer size must be multiple of element_size"));
}
} else {
length = convertToUint(args[2], &try_catch);
if (try_catch.HasCaught())
return try_catch.Exception();
byteLength = length * element_size;
if (byteOffset + byteLength > bufferLength) {
return ThrowException(String::New("length out of bounds"));
}
}
} else {
length = convertToUint(args[0], &try_catch);
byteLength = length * element_size;
byteOffset = 0;
Handle<Value> result = CreateExternalArrayBuffer(byteLength);
if (!result->IsObject())
return result;
buffer = result->ToObject();
}
void* data = buffer->GetIndexedPropertiesExternalArrayData();
ASSERT_PIN(data != NULL, "CreateExternalArray data != NULL");
Handle<Object> array = Object::New();
array->SetIndexedPropertiesToExternalArrayData(
static_cast<uint8_t*>(data) + byteOffset, type, length);
array->Set(String::New("byteLength"), Int32::New(byteLength), ReadOnly);
array->Set(String::New("byteOffset"), Int32::New(byteOffset), ReadOnly);
array->Set(String::New("length"), Int32::New(length), ReadOnly);
array->Set(String::New("BYTES_PER_ELEMENT"), Int32::New(element_size));
array->Set(String::New("buffer"), buffer, ReadOnly);
return array;
}
