1 files changed, 308 insertions, 0 deletions
diff --git a/fluent-bit/lib/wasm-micro-runtime-WAMR-1.2.2/samples/wasm-c-api/src/hostref.c b/fluent-bit/lib/wasm-micro-runtime-WAMR-1.2.2/samples/wasm-c-api/src/hostref.c
new file mode 100644
index 000000000..219c862d6
--- /dev/null
+++ b/fluent-bit/lib/wasm-micro-runtime-WAMR-1.2.2/samples/wasm-c-api/src/hostref.c
@@ -0,0 +1,308 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <inttypes.h>
+
+#include "wasm_c_api.h"
+
+#define own
+
+
+// A function to be called from Wasm code.
+own wasm_trap_t* callback(
+  const wasm_val_vec_t* args, wasm_val_vec_t* results
+) {
+  printf("Calling back...\n> ");
+  printf("> %p\n",
+    args->data[0].of.ref ? wasm_ref_get_host_info(args->data[0].of.ref) : NULL);
+  wasm_val_copy(&results->data[0], &args->data[0]);
+  return NULL;
+}
+
+
+wasm_func_t* get_export_func(const wasm_extern_vec_t* exports, size_t i) {
+  if (exports->size <= i || !wasm_extern_as_func(exports->data[i])) {
+    printf("> Error accessing function export %zu!\n", i);
+    exit(1);
+  }
+  return wasm_extern_as_func(exports->data[i]);
+}
+
+wasm_global_t* get_export_global(const wasm_extern_vec_t* exports, size_t i) {
+  if (exports->size <= i || !wasm_extern_as_global(exports->data[i])) {
+    printf("> Error accessing global export %zu!\n", i);
+    exit(1);
+  }
+  return wasm_extern_as_global(exports->data[i]);
+}
+
+wasm_table_t* get_export_table(const wasm_extern_vec_t* exports, size_t i) {
+  if (exports->size <= i || !wasm_extern_as_table(exports->data[i])) {
+    printf("> Error accessing table export %zu!\n", i);
+    exit(1);
+  }
+  return wasm_extern_as_table(exports->data[i]);
+}
+
+
+own wasm_ref_t* call_v_r(const wasm_func_t* func) {
+  printf("call_v_r... "); fflush(stdout);
+  wasm_val_t rs[] = { WASM_INIT_VAL };
+  wasm_val_vec_t args = WASM_EMPTY_VEC;
+  wasm_val_vec_t results = WASM_ARRAY_VEC(rs);
+  wasm_trap_t *trap = wasm_func_call(func, &args, &results);
+  if (trap) {
+      printf("> Error calling function!\n");
+      wasm_trap_delete(trap);
+      exit(1);
+  }
+  printf("okay\n");
+  return rs[0].of.ref;
+}
+
+void call_r_v(const wasm_func_t* func, wasm_ref_t* ref) {
+  printf("call_r_v... "); fflush(stdout);
+  wasm_val_t vs[1] = { WASM_REF_VAL(ref) };
+  wasm_val_vec_t args = WASM_ARRAY_VEC(vs);
+  wasm_val_vec_t results = WASM_EMPTY_VEC;
+  wasm_trap_t *trap = wasm_func_call(func, &args, &results);
+  if (trap) {
+      printf("> Error calling function!\n");
+      wasm_trap_delete(trap);
+      exit(1);
+  }
+  printf("okay\n");
+}
+
+own wasm_ref_t* call_r_r(const wasm_func_t* func, wasm_ref_t* ref) {
+  printf("call_r_r... "); fflush(stdout);
+  wasm_val_t vs[1] = { WASM_REF_VAL(ref) };
+  wasm_val_t rs[1] = { WASM_INIT_VAL };
+  wasm_val_vec_t args = WASM_ARRAY_VEC(vs);
+  wasm_val_vec_t results = WASM_ARRAY_VEC(rs);
+  wasm_trap_t *trap = wasm_func_call(func, &args, &results);
+  if (trap) {
+      printf("> Error calling function!\n");
+      wasm_trap_delete(trap);
+      exit(1);
+  }
+  printf("okay\n");
+  return rs[0].of.ref;
+}
+
+void call_ir_v(const wasm_func_t* func, int32_t i, wasm_ref_t* ref) {
+  printf("call_ir_v... "); fflush(stdout);
+  wasm_val_t vs[2] = { WASM_I32_VAL(i), WASM_REF_VAL(ref) };
+  wasm_val_vec_t args = WASM_ARRAY_VEC(vs);
+  wasm_val_vec_t results = WASM_EMPTY_VEC;
+  wasm_trap_t *trap = wasm_func_call(func, &args, &results);
+  if (trap) {
+      printf("> Error calling function!\n");
+      wasm_trap_delete(trap);
+      exit(1);
+  }
+  printf("okay\n");
+}
+
+own wasm_ref_t* call_i_r(const wasm_func_t* func, int32_t i) {
+  printf("call_i_r... "); fflush(stdout);
+  wasm_val_t vs[1] = { WASM_I32_VAL(i) };
+  wasm_val_t rs[1] = { WASM_INIT_VAL };
+  wasm_val_vec_t args = WASM_ARRAY_VEC(vs);
+  wasm_val_vec_t results = WASM_ARRAY_VEC(rs);
+  wasm_trap_t *trap = wasm_func_call(func, &args, &results);
+  if (trap) {
+      printf("> Error calling function!\n");
+      wasm_trap_delete(trap);
+      exit(1);
+  }
+  printf("okay\n");
+  return rs[0].of.ref;
+}
+
+void check(own wasm_ref_t* actual, const wasm_ref_t* expected) {
+  if (actual != expected &&
+      !(actual && expected && wasm_ref_same(actual, expected))) {
+    printf("> Error reading reference, expected %p, got %p\n",
+      expected ? wasm_ref_get_host_info(expected) : NULL,
+      actual ? wasm_ref_get_host_info(actual) : NULL);
+    exit(1);
+  }
+  // if (actual) wasm_ref_delete(actual);
+}
+
+
+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");
+#if WASM_ENABLE_AOT != 0 && WASM_ENABLE_INTERP == 0
+  FILE* file = fopen("hostref.aot", "rb");
+#else
+  FILE* file = fopen("hostref.wasm", "rb");
+#endif
+  if (!file) {
+    printf("> Error loading module!\n");
+    return 1;
+  }
+
+  int ret = fseek(file, 0L, SEEK_END);
+  if (ret == -1) {
+    printf("> Error loading module!\n");
+    fclose(file);
+    return 1;
+  }
+
+  long file_size = ftell(file);
+  if (file_size == -1) {
+    printf("> Error loading module!\n");
+    fclose(file);
+    return 1;
+  }
+
+  ret = fseek(file, 0L, SEEK_SET);
+  if (ret == -1) {
+    printf("> Error loading module!\n");
+    fclose(file);
+    return 1;
+  }
+
+  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");
+    fclose(file);
+    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);
+
+  // Create external callback function.
+  printf("Creating callback...\n");
+  own wasm_functype_t* callback_type = wasm_functype_new_1_1(
+    wasm_valtype_new(WASM_ANYREF), wasm_valtype_new(WASM_ANYREF));
+  own wasm_func_t* callback_func =
+    wasm_func_new(store, callback_type, callback);
+
+  wasm_functype_delete(callback_type);
+
+  // Instantiate.
+  printf("Instantiating module...\n");
+  wasm_extern_t* externs[] = { wasm_func_as_extern(callback_func) };
+  wasm_extern_vec_t imports = WASM_ARRAY_VEC(externs);
+  own wasm_instance_t* instance =
+    wasm_instance_new(store, module, &imports, NULL);
+  if (!instance) {
+    printf("> Error instantiating module!\n");
+    return 1;
+  }
+
+  wasm_func_delete(callback_func);
+  wasm_module_delete(module);
+
+  // Extract export.
+  printf("Extracting exports...\n");
+  own wasm_extern_vec_t exports;
+  wasm_instance_exports(instance, &exports);
+  size_t i = 0;
+  wasm_global_t* global = get_export_global(&exports, i++);
+  wasm_table_t* table = get_export_table(&exports, i++);
+  wasm_func_t* global_set = get_export_func(&exports, i++);
+  wasm_func_t* global_get = get_export_func(&exports, i++);
+  wasm_func_t* table_set = get_export_func(&exports, i++);
+  wasm_func_t* table_get = get_export_func(&exports, i++);
+  wasm_func_t* func_call = get_export_func(&exports, i++);
+
+  wasm_instance_delete(instance);
+
+  // Create host references.
+  printf("Creating host references...\n");
+  own wasm_ref_t* host1 = wasm_foreign_as_ref(wasm_foreign_new(store));
+  own wasm_ref_t* host2 = wasm_foreign_as_ref(wasm_foreign_new(store));
+  wasm_ref_set_host_info(host1, (void*)1);
+  wasm_ref_set_host_info(host2, (void*)2);
+
+  // Some sanity checks.
+  check(NULL, NULL);
+  wasm_ref_t *host1_cp = wasm_ref_copy(host1);
+  wasm_ref_t *host2_cp = wasm_ref_copy(host2);
+  check(host1_cp, host1);
+  check(host2_cp, host2);
+  wasm_ref_delete(host1_cp);
+  wasm_ref_delete(host2_cp);
+
+  own wasm_val_t val;
+  val.kind = WASM_ANYREF;
+  val.of.ref = wasm_ref_copy(host1);
+  wasm_ref_t *ref_cp = wasm_ref_copy(val.of.ref);
+  check(ref_cp, host1);
+  check(val.of.ref, host1);
+  wasm_ref_delete(val.of.ref);
+  wasm_ref_delete(ref_cp);
+
+  // Interact.
+  printf("Accessing global...\n");
+  check(call_v_r(global_get), NULL);
+  call_r_v(global_set, host1);
+  check(call_v_r(global_get), host1);
+  call_r_v(global_set, host2);
+  check(call_v_r(global_get), host2);
+  call_r_v(global_set, NULL);
+  check(call_v_r(global_get), NULL);
+
+  wasm_global_get(global, &val);
+  assert(val.kind == WASM_ANYREF);
+  assert(val.of.ref == NULL);
+  val.of.ref = host2;
+  wasm_global_set(global, &val);
+  wasm_global_get(global, &val);
+  assert(val.kind == WASM_ANYREF);
+  assert(val.of.ref == host2);
+
+  printf("Accessing table...\n");
+  check(call_i_r(table_get, 0), NULL);
+  check(call_i_r(table_get, 1), NULL);
+  call_ir_v(table_set, 0, host1);
+  call_ir_v(table_set, 1, host2);
+  check(call_i_r(table_get, 0), host1);
+  check(call_i_r(table_get, 1), host2);
+  call_ir_v(table_set, 0, NULL);
+  check(call_i_r(table_get, 0), NULL);
+
+  check(wasm_table_get(table, 2), NULL);
+  wasm_table_set(table, 2, host1);
+  check(call_i_r(table_get, 2), host1);
+  check(wasm_table_get(table, 2), host1);
+
+  printf("Accessing function...\n");
+  check(call_r_r(func_call, NULL), NULL);
+  check(call_r_r(func_call, host1), host1);
+  check(call_r_r(func_call, host2), host2);
+
+  wasm_ref_delete(host1);
+  wasm_ref_delete(host2);
+
+  wasm_extern_vec_delete(&exports);
+
+  // Shut down.
+  printf("Shutting down...\n");
+  wasm_store_delete(store);
+  wasm_engine_delete(engine);
+
+  // All done.
+  printf("Done.\n");
+  return 0;
+}