DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Mercurial (d8847129d134)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 * vim: set ts=8 sts=4 et sw=4 tw=99:
 */

#ifdef XP_UNIX
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>

#include "jsfriendapi.h"
#include "js/StructuredClone.h"
#include "jsapi-tests/tests.h"
#include "vm/ArrayBufferObject.h"

const char test_data[] = "1234567890ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
const char test_filename[] = "temp-bug945152_MappedArrayBuffer";

BEGIN_TEST(testMappedArrayBuffer_bug945152)
{
    TempFile test_file;
    FILE* test_stream = test_file.open(test_filename);
    CHECK(fputs(test_data, test_stream) != EOF);
    test_file.close();

    // Offset 0.
    CHECK(TestCreateObject(0, 12));

    // Aligned offset.
    CHECK(TestCreateObject(8, 12));

    // Unaligned offset.
    CHECK(CreateNewObject(11, 12) == nullptr);

    // Offset + length greater than file size.
    CHECK(CreateNewObject(8, sizeof(test_data) - 7) == nullptr);

    // Release the mapped content.
    CHECK(TestReleaseContents());

    // Neuter mapped array buffer.
    CHECK(TestNeuterObject());

    // Clone mapped array buffer.
    CHECK(TestCloneObject());

    // Steal mapped array buffer contents.
    CHECK(TestStealContents());

    // Transfer mapped array buffer contents.
    CHECK(TestTransferObject());

    test_file.remove();

    return true;
}

JSObject* CreateNewObject(const int offset, const int length)
{
    int fd = open(test_filename, O_RDONLY);
    void* ptr = JS_CreateMappedArrayBufferContents(fd, offset, length);
    close(fd);
    if (!ptr)
        return nullptr;
    JSObject* obj = JS_NewMappedArrayBufferWithContents(cx, length, ptr);
    if (!obj) {
        JS_ReleaseMappedArrayBufferContents(ptr, length);
        return nullptr;
    }
    return obj;
}

bool VerifyObject(JS::HandleObject obj, uint32_t offset, uint32_t length, const bool mapped)
{
    JS::AutoCheckCannotGC nogc;

    CHECK(obj);
    CHECK(JS_IsArrayBufferObject(obj));
    CHECK_EQUAL(JS_GetArrayBufferByteLength(obj), length);
    if (mapped)
        CHECK(JS_IsMappedArrayBufferObject(obj));
    else
        CHECK(!JS_IsMappedArrayBufferObject(obj));
    const char* data = reinterpret_cast<const char*>(JS_GetArrayBufferData(obj, nogc));
    CHECK(data);
    CHECK(memcmp(data, test_data + offset, length) == 0);

    return true;
}

bool TestCreateObject(uint32_t offset, uint32_t length)
{
    JS::RootedObject obj(cx, CreateNewObject(offset, length));
    CHECK(VerifyObject(obj, offset, length, true));

    return true;
}

bool TestReleaseContents()
{
    int fd = open(test_filename, O_RDONLY);
    void* ptr = JS_CreateMappedArrayBufferContents(fd, 0, 12);
    close(fd);
    if (!ptr)
        return false;
    JS_ReleaseMappedArrayBufferContents(ptr, 12);

    return true;
}

bool TestNeuterObject()
{
    JS::RootedObject obj(cx, CreateNewObject(8, 12));
    CHECK(obj);
    JS_NeuterArrayBuffer(cx, obj, ChangeData);
    CHECK(isNeutered(obj));

    return true;
}

bool TestCloneObject()
{
    JS::RootedObject obj1(cx, CreateNewObject(8, 12));
    CHECK(obj1);
    JSAutoStructuredCloneBuffer cloned_buffer;
    JS::RootedValue v1(cx, OBJECT_TO_JSVAL(obj1));
    const JSStructuredCloneCallbacks* callbacks = js::GetContextStructuredCloneCallbacks(cx);
    CHECK(cloned_buffer.write(cx, v1, callbacks, nullptr));
    JS::RootedValue v2(cx);
    CHECK(cloned_buffer.read(cx, &v2, callbacks, nullptr));
    JS::RootedObject obj2(cx, v2.toObjectOrNull());
    CHECK(VerifyObject(obj2, 8, 12, false));

    return true;
}

bool TestStealContents()
{
    JS::RootedObject obj(cx, CreateNewObject(8, 12));
    CHECK(obj);
    void* contents = JS_StealArrayBufferContents(cx, obj);
    CHECK(contents);
    CHECK(memcmp(contents, test_data + 8, 12) == 0);
    CHECK(isNeutered(obj));

    return true;
}

bool TestTransferObject()
{
    JS::RootedObject obj1(cx, CreateNewObject(8, 12));
    CHECK(obj1);
    JS::RootedValue v1(cx, OBJECT_TO_JSVAL(obj1));

    // Create an Array of transferable values.
    JS::AutoValueVector argv(cx);
    argv.append(v1);
    JS::RootedObject obj(cx, JS_NewArrayObject(cx, JS::HandleValueArray::subarray(argv, 0, 1)));
    CHECK(obj);
    JS::RootedValue transferable(cx, OBJECT_TO_JSVAL(obj));

    JSAutoStructuredCloneBuffer cloned_buffer;
    const JSStructuredCloneCallbacks* callbacks = js::GetContextStructuredCloneCallbacks(cx);
    CHECK(cloned_buffer.write(cx, v1, transferable, callbacks, nullptr));
    JS::RootedValue v2(cx);
    CHECK(cloned_buffer.read(cx, &v2, callbacks, nullptr));
    JS::RootedObject obj2(cx, v2.toObjectOrNull());
    CHECK(VerifyObject(obj2, 8, 12, true));
    CHECK(isNeutered(obj1));

    return true;
}

bool isNeutered(JS::HandleObject obj)
{
    JS::RootedValue v(cx);
    return JS_GetProperty(cx, obj, "byteLength", &v) && v.toInt32() == 0;
}

static void GC(JSContext* cx)
{
    JS_GC(JS_GetRuntime(cx));
    // Trigger another to wait for background finalization to end.
    JS_GC(JS_GetRuntime(cx));
}

END_TEST(testMappedArrayBuffer_bug945152)
#endif