/*

   +----------------------------------------------------------------------+

   | Copyright © The PHP Group and Contributors.                          |

   +----------------------------------------------------------------------+

   | This source file is subject to the Modified BSD License that is      |

   | bundled with this package in the file LICENSE, and is available      |

   | through the World Wide Web at <https://www.php.net/license/>.        |

   |                                                                      |

   | SPDX-License-Identifier: BSD-3-Clause                                |

   +----------------------------------------------------------------------+

   | Authors: Nikita Popov <nikic@php.net>                                |

   +----------------------------------------------------------------------+

 */

#include "fuzzer-execute-common.h"

int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {

  if (Size > MAX_SIZE) {

    /* Large inputs have a large impact on fuzzer performance,

     * but are unlikely to be necessary to reach new codepaths. */

    return 0;

  }

  zend_string *jit_option = ZSTR_INIT_LITERAL("opcache.jit", 1);

  /* First run without JIT to determine whether we bail out. We should not run JITed code if

   * we bail out here, as the JIT code may loop infinitely. */

  steps_left = MAX_STEPS;

  bailed_out = false;

  zend_alter_ini_entry_chars(

    jit_option, "off", sizeof("off")-1, PHP_INI_USER, PHP_INI_STAGE_RUNTIME);

  fuzzer_do_request_from_buffer(

    FILE_NAME, (const char *) Data, Size, /* execute */ 1, opcache_invalidate);

  if (!bailed_out) {

    steps_left = MAX_STEPS;

    zend_alter_ini_entry_chars(jit_option,

      "tracing", sizeof("tracing")-1, PHP_INI_USER, PHP_INI_STAGE_RUNTIME);

    zend_execute_ex = orig_execute_ex;

    /* Trace & compile */

    fuzzer_do_request_from_buffer(

      FILE_NAME, (const char *) Data, Size, /* execute */ 1, NULL);

    /* Execute trace */

    fuzzer_do_request_from_buffer(

      FILE_NAME, (const char *) Data, Size, /* execute */ 1, opcache_invalidate);

    zend_execute_ex = fuzzer_execute_ex;

  }

  zend_string_release(jit_option);

  return 0;

}

int LLVMFuzzerInitialize(int *argc, char ***argv) {

  char ini_buf[512];

  snprintf(ini_buf, sizeof(ini_buf),

    "opcache.validate_timestamps=0\n"

    "opcache.file_update_protection=0\n"

    "opcache.memory_consumption=1024\n"

    "opcache.jit_buffer_size=128M\n"

    "opcache.jit_hot_func=1\n"

    "opcache.jit_hot_loop=1\n"

    "opcache.jit_hot_return=1\n"

    "opcache.jit_hot_side_exit=1\n"

    "opcache.jit_max_root_traces=100000\n"

    "opcache.jit_max_side_traces=100000\n"

    "opcache.jit_max_exit_counters=100000\n"

    "opcache.protect_memory=1\n");

  create_file();

  fuzzer_init_php_for_execute(ini_buf);

  return 0;

}