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/* 
|| This file is part of Pike. For copyright information see COPYRIGHT. 
|| Pike is distributed under GPL, LGPL and MPL. See the file COPYING 
|| for more information. 
*/ 
 
/* 
 * Pike embedding API. 
 * 
 * Henrik Grubbström 2004-12-27 
 */ 
 
#include "module.h" 
#include "fdlib.h" 
#include "backend.h" 
#include "lex.h" 
#include "pike_types.h" 
#include "builtin_functions.h" 
#include "interpret.h" 
#include "pike_error.h" 
#include "pike_macros.h" 
#include "callback.h" 
#include "signal_handler.h" 
#include "threads.h" 
#include "dynamic_load.h" 
#include "gc.h" 
#include "cpp.h" 
#include "main.h" 
#include "operators.h" 
#include "rbtree.h" 
#include "constants.h" 
#include "version.h" 
#include "pike_rusage.h" 
#include "module_support.h" 
#include "opcodes.h" 
#include "pike_cpulib.h" 
#include "pike_embed.h" 
#include "pike_modules.h" 
 
#if defined(__linux__) && defined(HAVE_DLOPEN) && defined(HAVE_DLFCN_H) 
#include <dlfcn.h> 
#endif 
 
#include "las.h" 
 
#include <errno.h> 
#include <locale.h> 
 
#include "time_stuff.h" 
 
#ifdef HAVE_SYS_RESOURCE_H 
#include <sys/resource.h> 
#endif 
 
#ifdef TRY_USE_MMX 
#ifdef HAVE_MMX_H 
#include <mmx.h> 
#else 
#include <asm/mmx.h> 
#endif 
int try_use_mmx; 
#endif 
 
 
/* Define this to trace the execution of main(). */ 
/* #define TRACE_MAIN */ 
 
/* Define this for extra C-stack debug. */ 
/* #define STACK_DEBUG */ 
 
#ifdef PIKE_EXTRA_DEBUG 
#define TRACE_MAIN 
#define STACK_DEBUG 
#endif 
 
#ifdef TRACE_MAIN 
#define TRACE(X)      fprintf X 
#else /* !TRACE_MAIN */ 
#define TRACE(X) 
#endif /* TRACE_MAIN */ 
 
PMOD_EXPORT int debug_options=0; 
PMOD_EXPORT int runtime_options=0; 
PMOD_EXPORT int d_flag=0; 
PMOD_EXPORT int c_flag=0; 
PMOD_EXPORT int default_t_flag=0; 
PMOD_EXPORT int a_flag=0; 
PMOD_EXPORT int l_flag=0; 
PMOD_EXPORT int p_flag=0; 
 
int set_pike_debug_options(int bits, int mask) 
{ 
  return debug_options = (debug_options & ~mask) | (bits & mask); 
} 
 
int set_pike_runtime_options(int bits, int mask) 
{ 
  return runtime_options = (runtime_options & ~mask) | (bits & mask); 
} 
 
char **ARGV; 
const char *master_file = NULL; 
 
void init_pike(char **argv, const char *file) 
{ 
  init_pike_memory(); 
 
  init_rusage(); 
 
  /* Attempt to make sure stderr is unbuffered. */ 
  setvbuf(stderr, NULL, _IONBF, 0); 
 
#ifdef TRY_USE_MMX 
  TRACE((stderr, "Init MMX...\n")); 
  try_use_mmx=mmx_ok(); 
#endif 
 
#ifdef OWN_GETHRTIME 
/* initialize our own gethrtime conversion /Mirar */ 
  TRACE((stderr, "Init gethrtime...\n")); 
  own_gethrtime_init(); 
#endif 
 
  ARGV=argv; 
  master_file = file; 
 
  TRACE((stderr, "Main init...\n")); 
  fd_init(); 
  { 
    extern void init_node_s_blocks(void); 
    init_node_s_blocks(); 
    init_multiset(); 
    init_builtin_constants(); 
  } 
 
#ifdef HAVE_TZSET 
  tzset(); 
#endif /* HAVE_TZSET */ 
 
#ifdef LC_NUMERIC 
  setlocale(LC_NUMERIC, "C"); 
#endif 
#ifdef LC_CTYPE 
  setlocale(LC_CTYPE, ""); 
#endif 
#ifdef LC_TIME 
  setlocale(LC_TIME, "C"); 
#endif 
#ifdef LC_COLLATE 
  setlocale(LC_COLLATE, ""); 
#endif 
#ifdef LC_MESSAGES 
  setlocale(LC_MESSAGES, ""); 
#endif 
} 
 
static void (*pike_exit_cb)(int); 
 
void init_pike_runtime(void (*exit_cb)(int)) 
{ 
  JMP_BUF back; 
  int num; 
 
  pike_exit_cb = exit_cb; 
 
  TRACE((stderr, "Init C stack...\n")); 
 
  Pike_interpreter.stack_top = (char *)&exit_cb; 
 
  /* Adjust for anything already pushed on the stack. 
   * We align on a 64 KB boundary. 
   * Thus we at worst, lose 64 KB stack. 
   * 
   * We have to do it this way since some compilers don't like 
   * & and | on pointers, and casting to an integer type is 
   * too unsafe (consider 64-bit systems). 
   */ 
#if STACK_DIRECTION < 0 
  /* Equivalent with |= 0xffff */ 
  Pike_interpreter.stack_top += ~(PTR_TO_INT(Pike_interpreter.stack_top)) & 0xffff; 
#else /* STACK_DIRECTION >= 0 */ 
  /* Equivalent with &= ~0xffff */ 
  Pike_interpreter.stack_top -= PTR_TO_INT(Pike_interpreter.stack_top) & 0xffff; 
#endif /* STACK_DIRECTION < 0 */ 
 
#ifdef PROFILING 
  Pike_interpreter.stack_bottom=Pike_interpreter.stack_top; 
#endif 
 
#if defined(HAVE_GETRLIMIT) && defined(RLIMIT_STACK) 
  { 
    struct rlimit lim; 
    if(!getrlimit(RLIMIT_STACK, &lim)) 
    { 
#ifdef RLIM_INFINITY 
      if(lim.rlim_cur == RLIM_INFINITY) 
        lim.rlim_cur=1024*1024*32; 
#endif 
 
#ifdef Pike_INITIAL_STACK_SIZE 
      if(lim.rlim_cur > Pike_INITIAL_STACK_SIZE) 
        lim.rlim_cur=Pike_INITIAL_STACK_SIZE; 
#endif 
 
#if defined(__linux__) && defined(PIKE_THREADS) 
      /* This is a really really *stupid* limit in glibc 2.x 
       * which is not detectable since __pthread_initial_thread_bos 
       * went static. On a stupidity-scale from 1-10, this rates a 
       * solid 11. - Hubbe 
       */ 
      if(lim.rlim_cur > 2*1024*1024) lim.rlim_cur=2*1024*1024; 
#endif 
 
#if STACK_DIRECTION < 0 
      Pike_interpreter.stack_top -= lim.rlim_cur; 
#else /* STACK_DIRECTION >= 0 */ 
      Pike_interpreter.stack_top += lim.rlim_cur; 
#endif /* STACK_DIRECTION < 0 */ 
 
#if defined(__linux__) && defined(HAVE_DLOPEN) && defined(HAVE_DLFCN_H) && !defined(PPC) 
      { 
        char ** bos_location; 
        void *handle; 
        /* damn this is ugly -Hubbe */ 
        if((handle=dlopen(0, RTLD_LAZY))) 
        { 
          bos_location=dlsym(handle,"__pthread_initial_thread_bos"); 
 
          if(bos_location && *bos_location && 
             (*bos_location - Pike_interpreter.stack_top) *STACK_DIRECTION < 0) 
          { 
            Pike_interpreter.stack_top=*bos_location; 
          } 
 
          dlclose(handle); 
        } 
      } 
#else 
#ifdef HAVE_PTHREAD_INITIAL_THREAD_BOS 
      { 
        extern char * __pthread_initial_thread_bos; 
        /* Linux glibc threads are limited to a 4 Mb stack 
         * __pthread_initial_thread_bos is the actual limit 
         */ 
 
        if(__pthread_initial_thread_bos && 
           (__pthread_initial_thread_bos - Pike_interpreter.stack_top) *STACK_DIRECTION < 0) 
        { 
          Pike_interpreter.stack_top=__pthread_initial_thread_bos; 
        } 
      } 
#endif /* HAVE_PTHREAD_INITIAL_THREAD_BOS */ 
#endif /* __linux__ && HAVE_DLOPEN && HAVE_DLFCN_H && !PPC*/ 
 
#if STACK_DIRECTION < 0 
      Pike_interpreter.stack_top += 8192 * sizeof(char *); 
#else /* STACK_DIRECTION >= 0 */ 
      Pike_interpreter.stack_top -= 8192 * sizeof(char *); 
#endif /* STACK_DIRECTION < 0 */ 
 
 
#ifdef STACK_DEBUG 
      fprintf(stderr, "1: C-stack: 0x%08p - 0x%08p, direction:%d\n", 
              &exit_cb, Pike_interpreter.stack_top, STACK_DIRECTION); 
#endif /* STACK_DEBUG */ 
    } 
  } 
#else /* !HAVE_GETRLIMIT || !RLIMIT_STACK */ 
  /* 128 MB seems a bit extreme, most OS's seem to have their limit at ~8MB */ 
  Pike_interpreter.stack_top += STACK_DIRECTION * (1024*1024 * 8 - 8192 * (ptrdiff_t) sizeof(char *)); 
#ifdef STACK_DEBUG 
  fprintf(stderr, "2: C-stack: 0x%08p - 0x%08p, direction:%d\n", 
          &exit_cb, Pike_interpreter.stack_top, STACK_DIRECTION); 
#endif /* STACK_DEBUG */ 
#endif /* HAVE_GETRLIMIT && RLIMIT_STACK */ 
 
  TRACE((stderr, "Init time...\n")); 
  UPDATE_CURRENT_TIME(); 
 
  TRACE((stderr, "Init threads...\n")); 
  low_th_init(); 
 
  TRACE((stderr, "Init strings...\n")); 
  init_shared_string_table(); 
 
  TRACE((stderr, "Init interpreter...\n")); 
  init_interpreter(); 
 
  TRACE((stderr, "Init types...\n")); 
  init_types(); 
 
  TRACE((stderr, "Init opcodes...\n")); 
  init_opcodes(); 
 
  TRACE((stderr, "Init destruct...\n")); 
  low_init_object(); 
 
  TRACE((stderr, "Init programs...\n")); 
  init_program(); 
 
  TRACE((stderr, "Init objects...\n")); 
  init_object(); 
 
  if(SETJMP(back)) 
  { 
    if(throw_severity == THROW_EXIT) 
    { 
      num=throw_value.u.integer; 
    }else{ 
      call_handle_error(); 
      num=10; 
    } 
    UNSETJMP(back); 
 
    pike_do_exit(num); 
  } else { 
    back.severity=THROW_EXIT; 
 
    TRACE((stderr, "Init modules...\n")); 
    init_modules(); 
 
#ifdef TEST_MULTISET 
    /* A C-level testsuite for the low level stuff in multisets. */ 
    test_multiset(); 
#endif 
    UNSETJMP(back); 
  } 
} 
 
/* 
 * Support for limited number of instructions. 
 */ 
 
/* FIXME: Thread specific limit? */ 
static unsigned long instructions_left = 0; 
 
static void time_to_exit(struct callback *UNUSED(cb), void *UNUSED(tmp), void *UNUSED(ignored)) 
{ 
  if(!(instructions_left--)) 
  { 
    /* FIXME: Special THROW_* type? */ 
    push_int(0); 
    f_exit(1); 
  } 
} 
 
void set_pike_evaluator_limit(unsigned long num_instrs) 
{ 
  if (!num_instrs) return; 
  if (!instructions_left) { 
    add_to_callback(&evaluator_callbacks, time_to_exit, 0, 0); 
  } 
  instructions_left += num_instrs; 
} 
 
static struct callback_list post_master_callbacks; 
 
PMOD_EXPORT struct callback *add_post_master_callback(callback_func call, 
                                                      void *arg, 
                                                      callback_func free_func) 
{ 
  return add_to_callback(&post_master_callbacks, call, arg, free_func); 
} 
 
struct object *load_pike_master(void) 
{ 
  struct object *m; 
  TRACE((stderr, "Init master...\n")); 
 
  if ((m = master())) { 
    call_callback(& post_master_callbacks, 0); 
    free_callback_list(& post_master_callbacks); 
  } 
  return m; 
} 
 
#ifdef PROFILING 
#ifdef PIKE_DEBUG 
void gdb_break_on_pike_stack_record(long stack_size) 
{ 
  ; 
} 
#endif 
 
static unsigned int samples[8200]; 
long record; 
 
static void sample_stack(struct callback *cb,void *UNUSED(tmp),void *UNUSED(ignored)) 
{ 
  long stack_size=( ((char *)&cb) - Pike_interpreter.stack_bottom) * STACK_DIRECTION; 
  stack_size>>=10; 
  stack_size++; 
  if(stack_size<0) stack_size=0; 
  if(stack_size >= (long)NELEM(samples)) stack_size=NELEM(samples)-1; 
  samples[stack_size]++; 
#ifdef PIKE_DEBUG 
  if(stack_size > record) 
  { 
    gdb_break_on_pike_stack_record(stack_size); 
    record=stack_size; 
  } 
#endif 
} 
 
#endif 
 
void pike_enable_stack_profiling(void) 
{ 
#ifdef PROFILING 
  add_to_callback(&evaluator_callbacks, sample_stack, 0, 0); 
#endif 
} 
 
static struct callback_list exit_callbacks; 
 
PMOD_EXPORT struct callback *add_exit_callback(callback_func call, 
                                   void *arg, 
                                   callback_func free_func) 
{ 
  return add_to_callback(&exit_callbacks, call, arg, free_func); 
} 
 
void pike_do_exit(int num) 
{ 
  call_callback(&exit_callbacks, NULL); 
  free_callback_list(&exit_callbacks); 
 
  exit_modules(); 
 
  exit_pike_memory(); 
 
#ifdef PROFILING 
  { 
    int q; 
    for(q=0;q<(long)NELEM(samples);q++) 
      if(samples[q]) 
        fprintf(stderr,"STACK WAS %4d Kb %12u times\n",q-1,samples[q]); 
  } 
#endif 
 
#ifdef PIKE_DEBUG 
  /* For profiling */ 
  exit_opcodes(); 
#endif 
 
#ifdef INTERNAL_PROFILING 
  fprintf (stderr, "Evaluator callback calls: %lu\n", evaluator_callback_calls); 
#ifdef PIKE_THREADS 
  fprintf (stderr, "Thread yields: %lu\n", thread_yields); 
#endif 
  fprintf (stderr, "Main thread summary:\n"); 
  debug_print_rusage (stderr); 
#endif 
 
#ifdef PIKE_DEBUG 
  if (TYPEOF(svalue_int_zero) != T_INT || 
      SUBTYPEOF(svalue_int_zero) != NUMBER_NUMBER || 
      svalue_int_zero.u.integer != 0) 
    Pike_fatal ("svalue_int_zero has been changed.\n"); 
  if (TYPEOF(svalue_undefined) != T_INT || 
      SUBTYPEOF(svalue_undefined) != NUMBER_UNDEFINED || 
      svalue_undefined.u.integer != 0) 
    Pike_fatal ("svalue_undefined has been changed.\n"); 
  if (TYPEOF(svalue_int_one) != T_INT || 
      SUBTYPEOF(svalue_int_one) != NUMBER_NUMBER || 
      svalue_int_one.u.integer != 1) 
    Pike_fatal ("svalue_int_one has been changed.\n"); 
#endif 
 
  pike_exit_cb(num); 
} 
 
/* Some helper functions 
 */ 
 
void pike_push_argv(int argc, char **argv) 
{ 
  struct array *a; 
  int num; 
  a=allocate_array_no_init(argc,0); 
  for(num=0;num<argc;num++) 
  { 
    SET_SVAL(ITEM(a)[num], T_STRING, 0, string, make_shared_string(argv[num])); 
  } 
  a->type_field = BIT_STRING; 
  push_array(a); 
}