test(c-api) Split the test suites (deprecated and wasm-c-api).

lib/c-api/tests/wasm_c_api/wasm-c-api/example/table.cc

@@ -0,0 +1,192 @@
+#include <iostream>
+#include <fstream>
+#include <cstdlib>
+#include <string>
+#include <cinttypes>
+
+#include "wasm.hh"
+
+
+// A function to be called from Wasm code.
+auto neg_callback(
+  const wasm::Val args[], wasm::Val results[]
+) -> wasm::own<wasm::Trap> {
+  std::cout << "Calling back..." << std::endl;
+  results[0] = wasm::Val(-args[0].i32());
+  return nullptr;
+}
+
+
+auto get_export_table(wasm::ownvec<wasm::Extern>& exports, size_t i) -> wasm::Table* {
+  if (exports.size() <= i || !exports[i]->table()) {
+    std::cout << "> Error accessing table export " << i << "!" << std::endl;
+    exit(1);
+  }
+  return exports[i]->table();
+}
+
+auto get_export_func(const wasm::ownvec<wasm::Extern>& exports, size_t i) -> const wasm::Func* {
+  if (exports.size() <= i || !exports[i]->func()) {
+    std::cout << "> Error accessing function export " << i << "!" << std::endl;
+    exit(1);
+  }
+  return exports[i]->func();
+}
+
+template<class T, class U>
+void check(T actual, U expected) {
+  if (actual != expected) {
+    std::cout << "> Error on result, expected " << expected << ", got " << actual << std::endl;
+    exit(1);
+  }
+}
+
+void check(bool success) {
+  if (! success) {
+    std::cout << "> Error, expected success" << std::endl;
+    exit(1);
+  }
+}
+
+auto call(
+  const wasm::Func* func, wasm::Val&& arg1, wasm::Val&& arg2
+) -> wasm::Val {
+  wasm::Val args[2] = {std::move(arg1), std::move(arg2)};
+  wasm::Val results[1];
+  if (func->call(args, results)) {
+    std::cout << "> Error on result, expected return" << std::endl;
+    exit(1);
+  }
+  return results[0].copy();
+}
+
+void check_trap(const wasm::Func* func, wasm::Val&& arg1, wasm::Val&& arg2) {
+  wasm::Val args[2] = {std::move(arg1), std::move(arg2)};
+  wasm::Val results[1];
+  if (! func->call(args, results)) {
+    std::cout << "> Error on result, expected trap" << std::endl;
+    exit(1);
+  }
+}
+
+void run() {
+  // Initialize.
+  std::cout << "Initializing..." << std::endl;
+  auto engine = wasm::Engine::make();
+  auto store_ = wasm::Store::make(engine.get());
+  auto store = store_.get();
+
+  // Load binary.
+  std::cout << "Loading binary..." << std::endl;
+  std::ifstream file("table.wasm");
+  file.seekg(0, std::ios_base::end);
+  auto file_size = file.tellg();
+  file.seekg(0);
+  auto binary = wasm::vec<byte_t>::make_uninitialized(file_size);
+  file.read(binary.get(), file_size);
+  file.close();
+  if (file.fail()) {
+    std::cout << "> Error loading module!" << std::endl;
+    exit(1);
+  }
+
+  // Compile.
+  std::cout << "Compiling module..." << std::endl;
+  auto module = wasm::Module::make(store, binary);
+  if (!module) {
+    std::cout << "> Error compiling module!" << std::endl;
+    exit(1);
+  }
+
+  // Instantiate.
+  std::cout << "Instantiating module..." << std::endl;
+  auto instance = wasm::Instance::make(store, module.get(), nullptr);
+  if (!instance) {
+    std::cout << "> Error instantiating module!" << std::endl;
+    exit(1);
+  }
+
+  // Extract export.
+  std::cout << "Extracting exports..." << std::endl;
+  auto exports = instance->exports();
+  size_t i = 0;
+  auto table = get_export_table(exports, i++);
+  auto call_indirect = get_export_func(exports, i++);
+  auto f = get_export_func(exports, i++);
+  auto g = get_export_func(exports, i++);
+
+  // Create external function.
+  std::cout << "Creating callback..." << std::endl;
+  auto neg_type = wasm::FuncType::make(
+    wasm::ownvec<wasm::ValType>::make(wasm::ValType::make(wasm::ValKind::I32)),
+    wasm::ownvec<wasm::ValType>::make(wasm::ValType::make(wasm::ValKind::I32))
+  );
+  auto h = wasm::Func::make(store, neg_type.get(), neg_callback);
+
+  // Try cloning.
+  assert(table->copy()->same(table));
+
+  // Check initial table.
+  std::cout << "Checking table..." << std::endl;
+  check(table->size(), 2u);
+  check(table->get(0) == nullptr);
+  check(table->get(1) != nullptr);
+  check_trap(call_indirect, wasm::Val::i32(0), wasm::Val::i32(0));
+  check(call(call_indirect, wasm::Val::i32(7), wasm::Val::i32(1)).i32(), 7);
+  check_trap(call_indirect, wasm::Val::i32(0), wasm::Val::i32(2));
+
+  // Mutate table.
+  std::cout << "Mutating table..." << std::endl;
+  check(table->set(0, g));
+  check(table->set(1, nullptr));
+  check(! table->set(2, f));
+  check(table->get(0) != nullptr);
+  check(table->get(1) == nullptr);
+  check(call(call_indirect, wasm::Val::i32(7), wasm::Val::i32(0)).i32(), 666);
+  check_trap(call_indirect, wasm::Val::i32(0), wasm::Val::i32(1));
+  check_trap(call_indirect, wasm::Val::i32(0), wasm::Val::i32(2));
+
+  // Grow table.
+  std::cout << "Growing table..." << std::endl;
+  check(table->grow(3));
+  check(table->size(), 5u);
+  check(table->set(2, f));
+  check(table->set(3, h.get()));
+  check(! table->set(5, nullptr));
+  check(table->get(2) != nullptr);
+  check(table->get(3) != nullptr);
+  check(table->get(4) == nullptr);
+  check(call(call_indirect, wasm::Val::i32(5), wasm::Val::i32(2)).i32(), 5);
+  check(call(call_indirect, wasm::Val::i32(6), wasm::Val::i32(3)).i32(), -6);
+  check_trap(call_indirect, wasm::Val::i32(0), wasm::Val::i32(4));
+  check_trap(call_indirect, wasm::Val::i32(0), wasm::Val::i32(5));
+
+  check(table->grow(2, f));
+  check(table->size(), 7u);
+  check(table->get(5) != nullptr);
+  check(table->get(6) != nullptr);
+
+  check(! table->grow(5));
+  check(table->grow(3));
+  check(table->grow(0));
+
+  // Create stand-alone table.
+  // TODO(wasm+): Once Wasm allows multiple tables, turn this into import.
+  std::cout << "Creating stand-alone table..." << std::endl;
+  auto tabletype = wasm::TableType::make(
+    wasm::ValType::make(wasm::ValKind::FUNCREF), wasm::Limits(5, 5));
+  auto table2 = wasm::Table::make(store, tabletype.get());
+  check(table2->size() == 5);
+  check(! table2->grow(1));
+  check(table2->grow(0));
+
+  // Shut down.
+  std::cout << "Shutting down..." << std::endl;
+}
+
+
+int main(int argc, const char* argv[]) {
+  run();
+  std::cout << "Done." << std::endl;
+  return 0;
+}