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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include <stdlib.h>
#include "jsapi-tests/tests.h"
#include "wasm/WasmBinaryFormat.h"
static bool WriteValidBytes(js::wasm::Encoder& encoder, bool* passed)
{
*passed = false;
if (!encoder.empty())
return true;
// These remain the same under LEB128 unsigned encoding
if (!encoder.writeVarU32(0x0) ||
!encoder.writeVarU32(0x1) ||
!encoder.writeVarU32(0x42))
{
return false;
}
// 0x01 0x80
if (!encoder.writeVarU32(0x80))
return false;
// 0x03 0x80
if (!encoder.writeVarU32(0x180))
return false;
if (encoder.empty())
return true;
if (encoder.currentOffset() != 7)
return true;
*passed = true;
return true;
}
BEGIN_TEST(testWasmLEB128_encoding)
{
using namespace js;
using namespace wasm;
Bytes bytes;
Encoder encoder(bytes);
bool passed;
if (!WriteValidBytes(encoder, &passed))
return false;
CHECK(passed);
size_t i = 0;
CHECK(bytes[i++] == 0x0);
CHECK(bytes[i++] == 0x1);
CHECK(bytes[i++] == 0x42);
CHECK(bytes[i++] == 0x80);
CHECK(bytes[i++] == 0x01);
CHECK(bytes[i++] == 0x80);
CHECK(bytes[i++] == 0x03);
if (i + 1 < bytes.length())
CHECK(bytes[i++] == 0x00);
return true;
}
END_TEST(testWasmLEB128_encoding)
BEGIN_TEST(testWasmLEB128_valid_decoding)
{
using namespace js;
using namespace wasm;
Bytes bytes;
if (!bytes.append(0x0) || !bytes.append(0x1) || !bytes.append(0x42))
return false;
if (!bytes.append(0x80) || !bytes.append(0x01))
return false;
if (!bytes.append(0x80) || !bytes.append(0x03))
return false;
{
// Fallible decoding
Decoder decoder(bytes);
uint32_t value;
CHECK(decoder.readVarU32(&value) && value == 0x0);
CHECK(decoder.readVarU32(&value) && value == 0x1);
CHECK(decoder.readVarU32(&value) && value == 0x42);
CHECK(decoder.readVarU32(&value) && value == 0x80);
CHECK(decoder.readVarU32(&value) && value == 0x180);
CHECK(decoder.done());
}
{
// Infallible decoding
Decoder decoder(bytes);
uint32_t value;
value = decoder.uncheckedReadVarU32();
CHECK(value == 0x0);
value = decoder.uncheckedReadVarU32();
CHECK(value == 0x1);
value = decoder.uncheckedReadVarU32();
CHECK(value == 0x42);
value = decoder.uncheckedReadVarU32();
CHECK(value == 0x80);
value = decoder.uncheckedReadVarU32();
CHECK(value == 0x180);
CHECK(decoder.done());
}
return true;
}
END_TEST(testWasmLEB128_valid_decoding)
BEGIN_TEST(testWasmLEB128_invalid_decoding)
{
using namespace js;
using namespace wasm;
Bytes bytes;
// Fill bits as per 28 encoded bits
if (!bytes.append(0x80) || !bytes.append(0x80) || !bytes.append(0x80) || !bytes.append(0x80))
return false;
// Test last valid values
if (!bytes.append(0x00))
return false;
for (uint8_t i = 0; i < 0x0F; i++) {
bytes[4] = i;
{
Decoder decoder(bytes);
uint32_t value;
CHECK(decoder.readVarU32(&value));
CHECK(value == uint32_t(i << 28));
CHECK(decoder.done());
}
{
Decoder decoder(bytes);
uint32_t value = decoder.uncheckedReadVarU32();
CHECK(value == uint32_t(i << 28));
CHECK(decoder.done());
}
}
// Test all invalid values of the same size
for (uint8_t i = 0x10; i < 0xF0; i++) {
bytes[4] = i;
Decoder decoder(bytes);
uint32_t value;
CHECK(!decoder.readVarU32(&value));
}
return true;
}
END_TEST(testWasmLEB128_invalid_decoding)
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