third_party/wasm2c/src/test-binary-reader.cc

   1 /*
   2  * Copyright 2018 WebAssembly Community Group participants
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #include "gtest/gtest.h"
  18
  19 #include "wabt/binary-reader-nop.h"
  20 #include "wabt/binary-reader.h"
  21 #include "wabt/leb128.h"
  22 #include "wabt/opcode.h"
  23
  24 using namespace wabt;
  25
  26 namespace {
  27
  28 struct BinaryReaderError : BinaryReaderNop {
  29   bool OnError(const Error& error) override {
  30     first_error = error;
  31     return true;  // Error handled.
  32   }
  33
  34   Error first_error;
  35 };
  36
  37 }  // End of anonymous namespace
  38
  39 TEST(BinaryReader, DisabledOpcodes) {
  40   // Use the default features.
  41   ReadBinaryOptions options;
  42
  43   // Loop through all opcodes.
  44   for (uint32_t i = 0; i < static_cast<uint32_t>(Opcode::Invalid); ++i) {
  45     Opcode opcode(static_cast<Opcode::Enum>(i));
  46     if (opcode.IsEnabled(options.features)) {
  47       continue;
  48     }
  49
  50     // Use a shorter name to make the clang-formatted table below look nicer.
  51     std::vector<uint8_t> b = opcode.GetBytes();
  52     assert(b.size() <= 3);
  53     b.resize(3);
  54
  55     uint8_t data[] = {
  56         0x00, 0x61, 0x73, 0x6d, 0x01, 0x00, 0x00, 0x00,  // magic + version
  57         0x01, 0x04, 0x01, 0x60, 0x00, 0x00,  // type section: 1 type, (func)
  58         0x03, 0x02, 0x01, 0x00,              // func section: 1 func, type 0
  59         0x0a, 0x07, 0x01, 0x05, 0x00,        // code section: 1 func, 0 locals
  60         b[0], b[1], b[2],  // The instruction, padded with zeroes
  61         0x0b,              // end
  62     };
  63     const size_t size = sizeof(data);
  64
  65     BinaryReaderError reader;
  66     Result result = ReadBinary(data, size, &reader, options);
  67     EXPECT_EQ(Result::Error, result);
  68
  69     // This relies on the binary reader checking whether the opcode is allowed
  70     // before reading any further data needed by the instruction.
  71     const std::string& message = reader.first_error.message;
  72     EXPECT_EQ(0u, message.find("unexpected opcode"))
  73         << "Got error message: " << message;
  74   }
  75 }