#include <stdio.h> #include <stdlib.h> #include <string.h> #include <inttypes.h> #include "wasm.h" #define own void print_frame(wasm_frame_t* frame) { printf("> %p @ 0x%zx = %"PRIu32".0x%zx\n", wasm_frame_instance(frame), wasm_frame_module_offset(frame), wasm_frame_func_index(frame), wasm_frame_func_offset(frame) ); } int main(int argc, const char* argv[]) { // Initialize. printf("Initializing...\n"); wasm_engine_t* engine = wasm_engine_new(); wasm_store_t* store = wasm_store_new(engine); // Load binary. printf("Loading binary...\n"); FILE* file = fopen("start.wasm", "r"); if (!file) { printf("> Error loading module!\n"); return 1; } fseek(file, 0L, SEEK_END); size_t file_size = ftell(file); fseek(file, 0L, SEEK_SET); wasm_byte_vec_t binary; wasm_byte_vec_new_uninitialized(&binary, file_size); if (fread(binary.data, file_size, 1, file) != 1) { printf("> Error loading module!\n"); return 1; } fclose(file); // Compile. printf("Compiling module...\n"); own wasm_module_t* module = wasm_module_new(store, &binary); if (!module) { printf("> Error compiling module!\n"); return 1; } wasm_byte_vec_delete(&binary); // Instantiate. printf("Instantiating module...\n"); own wasm_trap_t* trap = NULL; own wasm_instance_t* instance = wasm_instance_new(store, module, NULL, &trap); if (instance || !trap) { printf("> Error instantiating module, expected trap!\n"); return 1; } wasm_module_delete(module); // Print result. printf("Printing message...\n"); own wasm_name_t message; wasm_trap_message(trap, &message); printf("> %s\n", message.data); printf("Printing origin...\n"); own wasm_frame_t* frame = wasm_trap_origin(trap); if (frame) { print_frame(frame); wasm_frame_delete(frame); } else { printf("> Empty origin.\n"); } printf("Printing trace...\n"); own wasm_frame_vec_t trace; wasm_trap_trace(trap, &trace); if (trace.size > 0) { for (size_t i = 0; i < trace.size; ++i) { print_frame(trace.data[i]); } } else { printf("> Empty trace.\n"); } wasm_frame_vec_delete(&trace); wasm_trap_delete(trap); wasm_name_delete(&message); // Shut down. printf("Shutting down...\n"); wasm_store_delete(store); wasm_engine_delete(engine); // All done. printf("Done.\n"); return 0; }