1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/js/src/jsapi-tests/testArrayBuffer.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,162 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
1.5 + * vim: set ts=8 sts=4 et sw=4 tw=99:
1.6 + */
1.7 +
1.8 +#include "jsfriendapi.h"
1.9 +
1.10 +#include "jsapi-tests/tests.h"
1.11 +
1.12 +BEGIN_TEST(testArrayBuffer_bug720949_steal)
1.13 +{
1.14 + static const unsigned NUM_TEST_BUFFERS = 2;
1.15 + static const unsigned MAGIC_VALUE_1 = 3;
1.16 + static const unsigned MAGIC_VALUE_2 = 17;
1.17 +
1.18 + JS::RootedObject buf_len1(cx), buf_len200(cx);
1.19 + JS::RootedObject tarray_len1(cx), tarray_len200(cx);
1.20 +
1.21 + uint32_t sizes[NUM_TEST_BUFFERS] = { sizeof(uint32_t), 200 * sizeof(uint32_t) };
1.22 + JS::HandleObject testBuf[NUM_TEST_BUFFERS] = { buf_len1, buf_len200 };
1.23 + JS::HandleObject testArray[NUM_TEST_BUFFERS] = { tarray_len1, tarray_len200 };
1.24 +
1.25 + // Single-element ArrayBuffer (uses fixed slots for storage)
1.26 + CHECK(buf_len1 = JS_NewArrayBuffer(cx, sizes[0]));
1.27 + CHECK(tarray_len1 = JS_NewInt32ArrayWithBuffer(cx, testBuf[0], 0, -1));
1.28 +
1.29 + JS_SetElement(cx, testArray[0], 0, MAGIC_VALUE_1);
1.30 +
1.31 + // Many-element ArrayBuffer (uses dynamic storage)
1.32 + CHECK(buf_len200 = JS_NewArrayBuffer(cx, 200 * sizeof(uint32_t)));
1.33 + CHECK(tarray_len200 = JS_NewInt32ArrayWithBuffer(cx, testBuf[1], 0, -1));
1.34 +
1.35 + for (unsigned i = 0; i < NUM_TEST_BUFFERS; i++) {
1.36 + JS::HandleObject obj = testBuf[i];
1.37 + JS::HandleObject view = testArray[i];
1.38 + uint32_t size = sizes[i];
1.39 + JS::RootedValue v(cx);
1.40 +
1.41 + // Byte lengths should all agree
1.42 + CHECK(JS_IsArrayBufferObject(obj));
1.43 + CHECK_EQUAL(JS_GetArrayBufferByteLength(obj), size);
1.44 + JS_GetProperty(cx, obj, "byteLength", &v);
1.45 + CHECK_SAME(v, INT_TO_JSVAL(size));
1.46 + JS_GetProperty(cx, view, "byteLength", &v);
1.47 + CHECK_SAME(v, INT_TO_JSVAL(size));
1.48 +
1.49 + // Modifying the underlying data should update the value returned through the view
1.50 + uint8_t *data = JS_GetStableArrayBufferData(cx, obj);
1.51 + CHECK(data != nullptr);
1.52 + *reinterpret_cast<uint32_t*>(data) = MAGIC_VALUE_2;
1.53 + CHECK(JS_GetElement(cx, view, 0, &v));
1.54 + CHECK_SAME(v, INT_TO_JSVAL(MAGIC_VALUE_2));
1.55 +
1.56 + // Steal the contents
1.57 + void *contents = JS_StealArrayBufferContents(cx, obj);
1.58 + CHECK(contents != nullptr);
1.59 + CHECK(data != nullptr);
1.60 +
1.61 + // Check that the original ArrayBuffer is neutered
1.62 + CHECK_EQUAL(JS_GetArrayBufferByteLength(obj), 0);
1.63 + CHECK(JS_GetProperty(cx, obj, "byteLength", &v));
1.64 + CHECK_SAME(v, INT_TO_JSVAL(0));
1.65 + CHECK(JS_GetProperty(cx, view, "byteLength", &v));
1.66 + CHECK_SAME(v, INT_TO_JSVAL(0));
1.67 + CHECK(JS_GetProperty(cx, view, "byteOffset", &v));
1.68 + CHECK_SAME(v, INT_TO_JSVAL(0));
1.69 + CHECK(JS_GetProperty(cx, view, "length", &v));
1.70 + CHECK_SAME(v, INT_TO_JSVAL(0));
1.71 + CHECK_EQUAL(JS_GetArrayBufferByteLength(obj), 0);
1.72 + v = JSVAL_VOID;
1.73 + JS_GetElement(cx, obj, 0, &v);
1.74 + CHECK_SAME(v, JSVAL_VOID);
1.75 +
1.76 + // Transfer to a new ArrayBuffer
1.77 + JS::RootedObject dst(cx, JS_NewArrayBufferWithContents(cx, size, contents));
1.78 + CHECK(JS_IsArrayBufferObject(dst));
1.79 + data = JS_GetStableArrayBufferData(cx, obj);
1.80 +
1.81 + JS::RootedObject dstview(cx, JS_NewInt32ArrayWithBuffer(cx, dst, 0, -1));
1.82 + CHECK(dstview != nullptr);
1.83 +
1.84 + CHECK_EQUAL(JS_GetArrayBufferByteLength(dst), size);
1.85 + data = JS_GetStableArrayBufferData(cx, dst);
1.86 + CHECK(data != nullptr);
1.87 + CHECK_EQUAL(*reinterpret_cast<uint32_t*>(data), MAGIC_VALUE_2);
1.88 + CHECK(JS_GetElement(cx, dstview, 0, &v));
1.89 + CHECK_SAME(v, INT_TO_JSVAL(MAGIC_VALUE_2));
1.90 + }
1.91 +
1.92 + return true;
1.93 +}
1.94 +END_TEST(testArrayBuffer_bug720949_steal)
1.95 +
1.96 +// Varying number of views of a buffer, to test the neutering weak pointers
1.97 +BEGIN_TEST(testArrayBuffer_bug720949_viewList)
1.98 +{
1.99 + JS::RootedObject buffer(cx);
1.100 +
1.101 + // No views
1.102 + buffer = JS_NewArrayBuffer(cx, 2000);
1.103 + buffer = nullptr;
1.104 + GC(cx);
1.105 +
1.106 + // One view.
1.107 + {
1.108 + buffer = JS_NewArrayBuffer(cx, 2000);
1.109 + JS::RootedObject view(cx, JS_NewUint8ArrayWithBuffer(cx, buffer, 0, -1));
1.110 + void *contents = JS_StealArrayBufferContents(cx, buffer);
1.111 + CHECK(contents != nullptr);
1.112 + JS_free(nullptr, contents);
1.113 + GC(cx);
1.114 + CHECK(isNeutered(view));
1.115 + CHECK(isNeutered(buffer));
1.116 + view = nullptr;
1.117 + GC(cx);
1.118 + buffer = nullptr;
1.119 + GC(cx);
1.120 + }
1.121 +
1.122 + // Two views
1.123 + {
1.124 + buffer = JS_NewArrayBuffer(cx, 2000);
1.125 +
1.126 + JS::RootedObject view1(cx, JS_NewUint8ArrayWithBuffer(cx, buffer, 0, -1));
1.127 + JS::RootedObject view2(cx, JS_NewUint8ArrayWithBuffer(cx, buffer, 1, 200));
1.128 +
1.129 + // Remove, re-add a view
1.130 + view2 = nullptr;
1.131 + GC(cx);
1.132 + view2 = JS_NewUint8ArrayWithBuffer(cx, buffer, 1, 200);
1.133 +
1.134 + // Neuter
1.135 + void *contents = JS_StealArrayBufferContents(cx, buffer);
1.136 + CHECK(contents != nullptr);
1.137 + JS_free(nullptr, contents);
1.138 +
1.139 + CHECK(isNeutered(view1));
1.140 + CHECK(isNeutered(view2));
1.141 + CHECK(isNeutered(buffer));
1.142 +
1.143 + view1 = nullptr;
1.144 + GC(cx);
1.145 + view2 = nullptr;
1.146 + GC(cx);
1.147 + buffer = nullptr;
1.148 + GC(cx);
1.149 + }
1.150 +
1.151 + return true;
1.152 +}
1.153 +
1.154 +static void GC(JSContext *cx)
1.155 +{
1.156 + JS_GC(JS_GetRuntime(cx));
1.157 + JS_GC(JS_GetRuntime(cx)); // Trigger another to wait for background finalization to end
1.158 +}
1.159 +
1.160 +bool isNeutered(JS::HandleObject obj) {
1.161 + JS::RootedValue v(cx);
1.162 + return JS_GetProperty(cx, obj, "byteLength", &v) && v.toInt32() == 0;
1.163 +}
1.164 +
1.165 +END_TEST(testArrayBuffer_bug720949_viewList)
