1 files changed, 88 insertions, 0 deletions
diff --git a/chromium/v8/third_party/wasm-api/example/start.cc b/chromium/v8/third_party/wasm-api/example/start.cc
new file mode 100644
index 00000000000..71d6fd25add
--- /dev/null
+++ b/chromium/v8/third_party/wasm-api/example/start.cc
@@ -0,0 +1,88 @@
+#include <iostream>
+#include <fstream>
+#include <cstdlib>
+#include <string>
+#include <cinttypes>
+
+#include "wasm.hh"
+
+
+void print_frame(const wasm::Frame* frame) {
+  std::cout << "> " << frame->instance();
+  std::cout << " @ 0x" << std::hex << frame->module_offset();
+  std::cout << " = " << frame->func_index();
+  std::cout << ".0x" << std::hex << frame->func_offset() << std::endl;
+}
+
+
+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("start.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;
+  wasm::own<wasm::Trap> trap;
+  auto instance = wasm::Instance::make(store, module.get(), nullptr, &trap);
+  if (instance || !trap) {
+    std::cout << "> Error instantiating module, expected trap!" << std::endl;
+    exit(1);
+  }
+
+  // Print result.
+  std::cout << "Printing message..." << std::endl;
+  std::cout << "> " << trap->message().get() << std::endl;
+
+  std::cout << "Printing origin..." << std::endl;
+  auto frame = trap->origin();
+  if (frame) {
+    print_frame(frame.get());
+  } else {
+    std::cout << "> Empty origin." << std::endl;
+  }
+
+  std::cout << "Printing trace..." << std::endl;
+  auto trace = trap->trace();
+  if (trace.size() > 0) {
+    for (size_t i = 0; i < trace.size(); ++i) {
+      print_frame(trace[i].get());
+    }
+  } else {
+    std::cout << "> Empty trace." << std::endl;
+  }
+
+  // Shut down.
+  std::cout << "Shutting down..." << std::endl;
+}
+
+
+int main(int argc, const char* argv[]) {
+  run();
+  std::cout << "Done." << std::endl;
+  return 0;
+}
+