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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*/
#include "jsfriendapi.h"
#include "jsapi-tests/tests.h"
BEGIN_TEST(testArrayBuffer_bug720949_steal)
{
static const unsigned NUM_TEST_BUFFERS = 2;
static const unsigned MAGIC_VALUE_1 = 3;
static const unsigned MAGIC_VALUE_2 = 17;
JS::RootedObject buf_len1(cx), buf_len200(cx);
JS::RootedObject tarray_len1(cx), tarray_len200(cx);
uint32_t sizes[NUM_TEST_BUFFERS] = { sizeof(uint32_t), 200 * sizeof(uint32_t) };
JS::HandleObject testBuf[NUM_TEST_BUFFERS] = { buf_len1, buf_len200 };
JS::HandleObject testArray[NUM_TEST_BUFFERS] = { tarray_len1, tarray_len200 };
// Single-element ArrayBuffer (uses fixed slots for storage)
CHECK(buf_len1 = JS_NewArrayBuffer(cx, sizes[0]));
CHECK(tarray_len1 = JS_NewInt32ArrayWithBuffer(cx, testBuf[0], 0, -1));
CHECK(JS_SetElement(cx, testArray[0], 0, MAGIC_VALUE_1));
// Many-element ArrayBuffer (uses dynamic storage)
CHECK(buf_len200 = JS_NewArrayBuffer(cx, 200 * sizeof(uint32_t)));
CHECK(tarray_len200 = JS_NewInt32ArrayWithBuffer(cx, testBuf[1], 0, -1));
for (unsigned i = 0; i < NUM_TEST_BUFFERS; i++) {
JS::HandleObject obj = testBuf[i];
JS::HandleObject view = testArray[i];
uint32_t size = sizes[i];
JS::RootedValue v(cx);
// Byte lengths should all agree
CHECK(JS_IsArrayBufferObject(obj));
CHECK_EQUAL(JS_GetArrayBufferByteLength(obj), size);
CHECK(JS_GetProperty(cx, obj, "byteLength", &v));
CHECK(v.isInt32(size));
CHECK(JS_GetProperty(cx, view, "byteLength", &v));
CHECK(v.isInt32(size));
// Modifying the underlying data should update the value returned through the view
{
JS::AutoCheckCannotGC nogc;
bool sharedDummy;
uint8_t* data = JS_GetArrayBufferData(obj, &sharedDummy, nogc);
CHECK(data != nullptr);
*reinterpret_cast<uint32_t*>(data) = MAGIC_VALUE_2;
}
CHECK(JS_GetElement(cx, view, 0, &v));
CHECK(v.isInt32(MAGIC_VALUE_2));
// Steal the contents
void* contents = JS_StealArrayBufferContents(cx, obj);
CHECK(contents != nullptr);
CHECK(JS_IsDetachedArrayBufferObject(obj));
// Transfer to a new ArrayBuffer
JS::RootedObject dst(cx, JS_NewArrayBufferWithContents(cx, size, contents));
CHECK(JS_IsArrayBufferObject(dst));
{
JS::AutoCheckCannotGC nogc;
bool sharedDummy;
(void) JS_GetArrayBufferData(obj, &sharedDummy, nogc);
}
JS::RootedObject dstview(cx, JS_NewInt32ArrayWithBuffer(cx, dst, 0, -1));
CHECK(dstview != nullptr);
CHECK_EQUAL(JS_GetArrayBufferByteLength(dst), size);
{
JS::AutoCheckCannotGC nogc;
bool sharedDummy;
uint8_t* data = JS_GetArrayBufferData(dst, &sharedDummy, nogc);
CHECK(data != nullptr);
CHECK_EQUAL(*reinterpret_cast<uint32_t*>(data), MAGIC_VALUE_2);
}
CHECK(JS_GetElement(cx, dstview, 0, &v));
CHECK(v.isInt32(MAGIC_VALUE_2));
}
return true;
}
END_TEST(testArrayBuffer_bug720949_steal)
// Varying number of views of a buffer, to test the detachment weak pointers
BEGIN_TEST(testArrayBuffer_bug720949_viewList)
{
JS::RootedObject buffer(cx);
// No views
buffer = JS_NewArrayBuffer(cx, 2000);
buffer = nullptr;
GC(cx);
// One view.
{
buffer = JS_NewArrayBuffer(cx, 2000);
JS::RootedObject view(cx, JS_NewUint8ArrayWithBuffer(cx, buffer, 0, -1));
void* contents = JS_StealArrayBufferContents(cx, buffer);
CHECK(contents != nullptr);
JS_free(nullptr, contents);
GC(cx);
CHECK(hasDetachedBuffer(view));
CHECK(JS_IsDetachedArrayBufferObject(buffer));
view = nullptr;
GC(cx);
buffer = nullptr;
GC(cx);
}
// Two views
{
buffer = JS_NewArrayBuffer(cx, 2000);
JS::RootedObject view1(cx, JS_NewUint8ArrayWithBuffer(cx, buffer, 0, -1));
JS::RootedObject view2(cx, JS_NewUint8ArrayWithBuffer(cx, buffer, 1, 200));
// Remove, re-add a view
view2 = nullptr;
GC(cx);
view2 = JS_NewUint8ArrayWithBuffer(cx, buffer, 1, 200);
// Detach
void* contents = JS_StealArrayBufferContents(cx, buffer);
CHECK(contents != nullptr);
JS_free(nullptr, contents);
CHECK(hasDetachedBuffer(view1));
CHECK(hasDetachedBuffer(view2));
CHECK(JS_IsDetachedArrayBufferObject(buffer));
view1 = nullptr;
GC(cx);
view2 = nullptr;
GC(cx);
buffer = nullptr;
GC(cx);
}
return true;
}
static void GC(JSContext* cx)
{
JS_GC(cx);
JS_GC(cx); // Trigger another to wait for background finalization to end
}
bool hasDetachedBuffer(JS::HandleObject obj) {
JS::RootedValue v(cx);
return JS_GetProperty(cx, obj, "byteLength", &v) && v.toInt32() == 0;
}
END_TEST(testArrayBuffer_bug720949_viewList)
BEGIN_TEST(testArrayBuffer_externalize)
{
if (!testWithSize(cx, 2)) // ArrayBuffer data stored inline in the object.
return false;
if (!testWithSize(cx, 2000)) // ArrayBuffer data stored out-of-line in a separate heap allocation.
return false;
return true;
}
bool testWithSize(JSContext* cx, size_t n)
{
JS::RootedObject buffer(cx, JS_NewArrayBuffer(cx, n));
CHECK(buffer != nullptr);
JS::RootedObject view(cx, JS_NewUint8ArrayWithBuffer(cx, buffer, 0, -1));
CHECK(view != nullptr);
void* contents = JS_ExternalizeArrayBufferContents(cx, buffer);
CHECK(contents != nullptr);
uint32_t actualLength;
CHECK(hasExpectedLength(cx, view, &actualLength));
CHECK(actualLength == n);
CHECK(!JS_IsDetachedArrayBufferObject(buffer));
CHECK(JS_GetArrayBufferByteLength(buffer) == uint32_t(n));
uint8_t* uint8Contents = static_cast<uint8_t*>(contents);
CHECK(*uint8Contents == 0);
uint8_t randomByte(rand() % UINT8_MAX);
*uint8Contents = randomByte;
JS::RootedValue v(cx);
CHECK(JS_GetElement(cx, view, 0, &v));
CHECK(v.toInt32() == randomByte);
view = nullptr;
GC(cx);
CHECK(JS_DetachArrayBuffer(cx, buffer));
GC(cx);
CHECK(*uint8Contents == randomByte);
JS_free(cx, contents);
GC(cx);
buffer = nullptr;
GC(cx);
return true;
}
static void GC(JSContext* cx)
{
JS_GC(cx);
JS_GC(cx); // Trigger another to wait for background finalization to end
}
static bool
hasExpectedLength(JSContext* cx, JS::HandleObject obj, uint32_t* len)
{
JS::RootedValue v(cx);
if (!JS_GetProperty(cx, obj, "byteLength", &v))
return false;
*len = v.toInt32();
return true;
}
END_TEST(testArrayBuffer_externalize)
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