/* Copyright 2024 Google LLC

Licensed under the Apache License, Version 2.0 (the "License");

you may not use this file except in compliance with the License.

You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software

distributed under the License is distributed on an "AS IS" BASIS,

WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

See the License for the specific language governing permissions and

limitations under the License.

*/

#include "llama.h"

#include <iostream>

#include <setjmp.h>

#include <unistd.h>

const char *model_arch = "llama";

const char *gen_arch = "general.architecture";

jmp_buf fuzzing_jmp_buf;

struct llama_model_kv_override fuzz_kv_overrides[2];

extern "C" void __wrap_abort(void) { longjmp(fuzzing_jmp_buf, 1); }

extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {

  llama_backend_init();

  char filename[256];

  sprintf(filename, "/tmp/libfuzzer.%d", getpid());

  FILE *fp = fopen(filename, "wb");

  if (!fp) {

    return 0;

  }

  fwrite(data, size, 1, fp);

  fclose(fp);

  auto params = llama_model_params{};

  memset(&params, 0x0, sizeof(struct llama_model_params));

  params.use_mmap = false;

  params.progress_callback = [](float progress, void *ctx) {

    (void)ctx;

    return progress > 0.50;

  };

  fuzz_kv_overrides[0].tag = LLAMA_KV_OVERRIDE_TYPE_STR;

  strcpy(fuzz_kv_overrides[0].val_str, model_arch);

  std::strcpy(fuzz_kv_overrides[0].key, gen_arch);

  params.kv_overrides =

      (const struct llama_model_kv_override *)fuzz_kv_overrides;

  if (setjmp(fuzzing_jmp_buf) == 0) {

    auto *model = llama_load_model_from_file(filename, params);

    if (model != nullptr) {

      llama_free_model(model);

    }

  }

  llama_backend_free();

  unlink(filename);

  return 0;

}