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/* -*- c -*- 
|| 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. 
*/ 
 
#include "module.h" 
#include "pike_error.h" 
#include "interpret.h" 
#include "pike_embed.h" 
#include "module_support.h" 
#include "builtin_functions.h" 
#include "gc.h" 
#include "opcodes.h" 
#include "bignum.h" 
 
DECLARATIONS 
 
/*! @module Debug 
 */ 
 
/*! @decl int(0..) map_all_objects(function(object:void) cb) 
 *! 
 *! Call cb for all objects that currently exist. The callback will 
 *! not be called with destructed objects as it's argument. 
 *! 
 *! Objects might be missed if @[cb] creates new objects or destroys 
 *! old ones. 
 *! 
 *! This function is only intended to be used for debug purposes. 
 *! 
 *! @returns 
 *!   The total number of objects 
 *! 
 *! @seealso 
 *!   @[next_object()], @[find_all_clones()] 
 */ 
PIKEFUN int(0..) map_all_objects(function(object:void) cb) 
{ 
    struct object *o = first_object; 
    INT32 total = 0; 
 
    while( o ) 
    { 
        struct object *next = o->next; 
        if( o->prog ) 
        { 
            ref_push_object( o ); 
            safe_apply_svalue( Pike_sp-2, 1, 1 ); 
            pop_stack(); 
        } 
        total++; 
        o = next; 
    } 
    RETURN total; 
} 
 
/*! @decl array(object) find_all_clones(program p, @ 
 *!                                     int(0..1)|void include_subclasses) 
 *! 
 *!   Return an array with all objects that are clones of @[p]. 
 *! 
 *! @param p 
 *!   Program that the objects should be a clone of. 
 *! 
 *! @param include_subclasses 
 *!   If true, include also objects that are clones of programs 
 *!   that have inherited @[p]. Note that this adds significant 
 *!   overhead. 
 *! 
 *! This function is only intended to be used for debug purposes. 
 *! 
 *! @seealso 
 *!   @[map_all_objects()] 
 */ 
PIKEFUN array(object) find_all_clones(program|function prog, 
                                      int(0..1)|void include_subclasses) 
{ 
  struct object *o = first_object; 
  struct program *p = program_from_svalue(prog); 
 
  if (!p) { 
    SIMPLE_ARG_TYPE_ERROR("Debug.find_all_clones", 1, "program"); 
  } 
 
  if (include_subclasses && !include_subclasses->u.integer) { 
    include_subclasses = NULL; 
  } 
 
  BEGIN_AGGREGATE_ARRAY(10) { 
 
    for (o = first_object; o; o = o->next) { 
      if (o->prog == p) { 
        ref_push_object(o); 
        DO_AGGREGATE_ARRAY(120); 
        continue; 
      } 
      if (include_subclasses && o->prog && 
          (o->prog->num_inherits > p->num_inherits)) { 
        int e; 
        /* Check if o->prog has inherited p. */ 
        if (o->prog->storage_needed < p->storage_needed) continue; 
        for (e = o->prog->num_inherits + 1 - p->num_inherits; e-- > 1;) { 
          if (o->prog->inherits[e].prog == p) { 
            /* Found. */ 
            ref_push_object(o); 
            DO_AGGREGATE_ARRAY(120); 
            break; 
          } 
        } 
      } 
    } 
 
  } END_AGGREGATE_ARRAY; 
} 
 
/*! @decl int refs(string|array|mapping|multiset|function|object|program o) 
 *! 
 *!   Return the number of references @[o] has. 
 *! 
 *!   It is mainly meant for debugging the Pike runtime, but can also be 
 *!   used to control memory usage. 
 *! 
 *! @note 
 *!   Note that the number of references will always be at least one since 
 *!   the value is located on the stack when this function is executed. 
 *! 
 *! @seealso 
 *!   @[next()], @[prev()] 
 */ 
PIKEFUN int refs(string|array|mapping|multiset|function|object|program o) 
{ 
  if(!REFCOUNTED_TYPE(TYPEOF(*o))) 
    SIMPLE_ARG_TYPE_ERROR("refs", 1, 
                          "array|mapping|multiset|object|" 
                          "function|program|string|type"); 
  RETURN o->u.refs[0]; 
} 
 
/*! @decl object next_object(object o) 
 *! @decl object next_object() 
 *! 
 *!   Returns the next object from the list of all objects. 
 *! 
 *!   All objects are stored in a linked list. 
 *! 
 *! @returns 
 *!   If no arguments have been given @[next_object()] will return the first 
 *!   object from the list. 
 *! 
 *!   If @[o] has been specified the object after @[o] on the list will be 
 *!   returned. 
 *! 
 *! @note 
 *!   This function is not recomended to use. 
 *! 
 *! @seealso 
 *!   @[destruct()] 
 */ 
PIKEFUN object next_object(void|object o) 
{ 
  if (!o) 
    o = first_object; 
  else 
    o = Pike_sp[-args].u.object->next; 
 
  while(o && !o->prog) o=o->next; 
 
  pop_n_elems(args); 
  if(o) 
    ref_push_object(o); 
  else 
    push_int(0); 
} 
 
/*! @decl mixed next(mixed x) 
 *! 
 *!   Find the next object/array/mapping/multiset/program or string. 
 *! 
 *!   All objects, arrays, mappings, multisets, programs and strings are 
 *!   stored in linked lists inside Pike. This function returns the next 
 *!   item on the corresponding list. It is mainly meant for debugging 
 *!   the Pike runtime, but can also be used to control memory usage. 
 *! 
 *! @seealso 
 *!   @[next_object()], @[prev()] 
 */ 
PIKEFUN mixed next(mixed x) 
rawtype tOr6(tFunc(tStr,tStr), 
             tFunc(tObj,tObj), 
             tFunc(tMapping,tMapping), 
             tFunc(tMultiset,tMultiset), 
             tFunc(tPrg(tObj),tPrg(tObj)), 
             tFunc(tArray,tArray)); 
{ 
  struct svalue tmp = *x; 
  switch(TYPEOF(tmp)) 
  { 
  case T_OBJECT: 
    tmp.u.object=tmp.u.object->next; 
    while(tmp.u.object && !tmp.u.object->prog) 
      tmp.u.object=tmp.u.object->next; 
    break; 
  case T_ARRAY:   tmp.u.array=tmp.u.array->next; break; 
  case T_MAPPING: tmp.u.mapping=tmp.u.mapping->next; break; 
  case T_MULTISET:tmp.u.multiset=tmp.u.multiset->next; break; 
  case T_PROGRAM: tmp.u.program=tmp.u.program->next; break; 
  case T_STRING:  tmp.u.string=next_pike_string(tmp.u.string); break; 
  default: 
    SIMPLE_ARG_TYPE_ERROR("next", 1, 
                          "object|array|mapping|multiset|program|string"); 
  } 
 
  if(tmp.u.refs) 
    assign_svalue(Pike_sp-1, &tmp); 
  else 
  { 
    pop_stack(); 
    push_int(0); 
  } 
} 
 
/*! @decl mixed prev(mixed x) 
 *! 
 *!   Find the previous object/array/mapping/multiset or program. 
 *! 
 *!   All objects, arrays, mappings, multisets and programs are 
 *!   stored in linked lists inside Pike. This function returns the previous 
 *!   item on the corresponding list. It is mainly meant for debugging 
 *!   the Pike runtime, but can also be used to control memory usage. 
 *! 
 *! @note 
 *!   Unlike @[next()] this function does not work on strings. 
 *! 
 *! @seealso 
 *!   @[next_object()], @[next()] 
 */ 
PIKEFUN mixed prev(mixed x) 
rawtype tOr5(tFunc(tObj,tObj), 
             tFunc(tMapping,tMapping), 
             tFunc(tMultiset,tMultiset), 
             tFunc(tPrg(tObj),tPrg(tObj)), 
             tFunc(tArray,tArray)); 
{ 
  struct svalue tmp = *x; 
  switch(TYPEOF(tmp)) 
  { 
  case T_OBJECT: 
    tmp.u.object=tmp.u.object->prev; 
    while(tmp.u.object && !tmp.u.object->prog) 
      tmp.u.object=tmp.u.object->prev; 
    break; 
  case T_ARRAY:   tmp.u.array=tmp.u.array->prev; break; 
  case T_MAPPING: tmp.u.mapping=tmp.u.mapping->prev; break; 
  case T_MULTISET:tmp.u.multiset=tmp.u.multiset->prev; break; 
  case T_PROGRAM: tmp.u.program=tmp.u.program->prev; break; 
  default: 
    SIMPLE_ARG_TYPE_ERROR("prev", 1, "object|array|mapping|multiset|program"); 
  } 
  if(tmp.u.refs) 
    assign_svalue(Pike_sp-1, &tmp); 
  else 
  { 
    pop_stack(); 
    push_int(0); 
  } 
} 
 
#ifdef PIKE_DEBUG 
/* This function is for debugging *ONLY* 
 * do not document please. /Hubbe 
 */ 
PIKEFUN int leak(array|mapping|multiset|object|function|program|string|type val) 
  export; 
{ 
  INT32 i; 
 
  if(!REFCOUNTED_TYPE(TYPEOF(*val))) 
    SIMPLE_ARG_TYPE_ERROR("leak", 1, 
                          "array|mapping|multiset|object|" 
                          "function|program|string|type"); 
 
  add_ref(val->u.dummy); 
  i = val->u.refs[0]; 
  RETURN i; 
} 
 
/*! @decl int(0..) debug(int(0..) level) 
 *! 
 *!   Set the run-time debug level. 
 *! 
 *! @returns 
 *!   The old debug level will be returned. 
 *! 
 *! @note 
 *!   This function is only available if the Pike runtime has been compiled 
 *!   with RTL debug. 
 */ 
PIKEFUN int(0..) debug(int(0..) d) 
  export; 
{ 
  pop_n_elems(args); 
  push_int(d_flag); 
  d_flag = d; 
} 
 
/*! @decl int(0..) optimizer_debug(int(0..) level) 
 *! 
 *!   Set the optimizer debug level. 
 *! 
 *! @returns 
 *!   The old optimizer debug level will be returned. 
 *! 
 *! @note 
 *!   This function is only available if the Pike runtime has been compiled 
 *!   with RTL debug. 
 */ 
PIKEFUN int(0..) optimizer_debug(int(0..) l) 
  export; 
{ 
  pop_n_elems(args); 
  push_int(l_flag); 
  l_flag = l; 
} 
 
/*! @decl int(0..) assembler_debug(int(0..) level) 
 *! 
 *!   Set the assembler debug level. 
 *! 
 *! @returns 
 *!   The old assembler debug level will be returned. 
 *! 
 *! @note 
 *!   This function is only available if the Pike runtime has been compiled 
 *!   with RTL debug. 
 */ 
PIKEFUN int(0..) assembler_debug(int(0..) l) 
  export; 
{ 
  pop_n_elems(args); 
  push_int(a_flag); 
  a_flag = l; 
} 
 
/*! @decl void dump_program_tables(program p, int(0..)|void indent) 
 *! 
 *! Dumps the internal tables for the program @[p] on stderr. 
 *! 
 *! @param p 
 *!   Program to dump. 
 *! 
 *! @param indent 
 *!   Number of spaces to indent the output. 
 */ 
PIKEFUN void dump_program_tables(program p, int(0..)|void indent) 
{ 
  dump_program_tables(p, indent?indent->u.integer:0); 
} 
 
/*! @decl mixed locate_references(string|array|mapping| @ 
 *!                              multiset|function|object| @ 
 *!                              program|type o) 
 *! @belongs Debug 
 *! 
 *!   This function is mostly intended for debugging. It will search through 
 *!   all data structures in Pike looking for @[o] and print the 
 *!   locations on stderr. @[o] can be anything but @expr{int@} or 
 *!   @expr{float@}. 
 *! 
 *! @note 
 *!   This function only exists if the Pike runtime has been compiled 
 *!   with RTL debug. 
 */ 
PIKEFUN mixed locate_references(mixed o) 
  rawtype tFunc(tSetvar(1,tMix),tVar(1)); 
{ 
  locate_references(o); 
} 
 
/*! @decl mixed describe(mixed x) 
 *! @belongs Debug 
 *! 
 *!   Prints out a description of the thing @[x] to standard error. 
 *!   The description contains various internal info associated with 
 *!   @[x]. 
 *! 
 *! @note 
 *!   This function only exists if the Pike runtime has been compiled 
 *!   with RTL debug. 
 */ 
PIKEFUN mixed describe(mixed x) 
  rawtype tFunc(tSetvar(1,tMix),tVar(1)); 
{ 
  debug_describe_svalue(debug_malloc_pass(&Pike_sp[-1])); 
} 
 
/*! @decl void gc_set_watch(array|multiset|mapping|object|function|program|string x) 
 *! @belongs Debug 
 *! 
 *!   Sets a watch on the given thing, so that the gc will print a 
 *!   message whenever it's encountered. Intended to be used together 
 *!   with breakpoints to debug the garbage collector. 
 *! 
 *! @note 
 *!   This function only exists if the Pike runtime has been compiled 
 *!   with RTL debug. 
 */ 
PIKEFUN void gc_set_watch(array|multiset|mapping|object|function|program|string x) 
{ 
  gc_watch(&Pike_sp[-1]); 
} 
 
/*! @decl void dump_backlog() 
 *! @belongs Debug 
 *! 
 *!   Dumps the 1024 latest executed opcodes, along with the source 
 *!   code lines, to standard error. The backlog is only collected on 
 *!   debug level 1 or higher, set with @[_debug] or with the @tt{-d@} 
 *!   argument on the command line. 
 *! 
 *! @note 
 *!   This function only exists if the Pike runtime has been compiled 
 *!   with RTL debug. 
 */ 
PIKEFUN void dump_backlog() 
{ 
  dump_backlog(); 
} 
 
#ifdef YYDEBUG 
 
/*! @decl int(0..) compiler_trace(int(0..) level) 
 *! 
 *!   Set the compiler trace level. 
 *! 
 *! @returns 
 *!   The old compiler trace level will be returned. 
 *! 
 *! @note 
 *!   This function is only available if the Pike runtime has been compiled 
 *!   with RTL debug. 
 */ 
PIKEFUN int(0..) compiler_trace(int(0..) yyd) 
  export; 
{ 
  extern int yydebug; 
  pop_n_elems(args); 
  push_int(yydebug); 
  yydebug = yyd; 
} 
 
#endif /* YYDEBUG */ 
 
/*! @decl void disassemble(function fun) 
 *! 
 *!   Disassemble a Pike function to @[Stdio.stderr]. 
 *! 
 *! @note 
 *!   This function is only available if the Pike runtime 
 *!   has been compiled with debug enabled. 
 */ 
PIKEFUN void disassemble(function fun) 
{ 
  if ((TYPEOF(*fun) != T_FUNCTION) || 
      (SUBTYPEOF(*fun) == FUNCTION_BUILTIN)) { 
    WERR("Disassembly only supported for functions implemented in Pike.\n"); 
  } else if (!fun->u.object->prog) { 
    WERR("Function in destructed object.\n"); 
  } else { 
    int f = SUBTYPEOF(*fun); 
    struct reference *ptr = PTR_FROM_INT(fun->u.object->prog, f); 
    struct program *p = PROG_FROM_PTR(fun->u.object->prog, ptr); 
    struct identifier *id = p->identifiers + ptr->identifier_offset; 
    if (id->func.offset >= 0) { 
      struct pike_string *tripples = 
        p->strings[read_program_data(p->program + id->func.offset, -1)]; 
      switch(tripples->size_shift) { 
#define CASE(SHIFT)                                     \ 
        case SHIFT:                                     \ 
          {                                             \ 
            PIKE_CONCAT(p_wchar, SHIFT) *str =          \ 
              PIKE_CONCAT(STR, SHIFT)(tripples);        \ 
            int i=0;                                    \ 
            while(i < tripples->len) {                  \ 
              WERR("@@@ %d: %s, %d, %d\n",              \ 
                      i/3,                              \ 
                      instrs[*str - F_OFFSET].          \ 
                      name,                             \ 
                      str[1], str[2]);                  \ 
              str += 3;                                 \ 
              i += 3;                                   \ 
            }                                           \ 
          }                                             \ 
          break 
        CASE(0); 
        CASE(1); 
        CASE(2); 
#undef CASE 
      } 
    } else { 
      WERR("Prototype.\n"); 
    } 
  } 
} 
 
#endif /* PIKE_DEBUG */ 
 
#ifdef DEBUG_MALLOC 
 
/*! @decl void reset_dmalloc() 
 *! 
 *! @note 
 *!   Only available when compiled with dmalloc. 
 */ 
PIKEFUN void reset_dmalloc() 
{ 
  reset_debug_malloc(); 
} 
 
extern char * dynamic_location(const char *file, INT_TYPE line); 
extern char * dmalloc_default_location; 
 
/*! @decl void dmalloc_set_name() 
 *! 
 *! @note 
 *!   Only available when compiled with dmalloc. 
 */ 
PIKEFUN void dmalloc_set_name() 
{ 
  dmalloc_default_location=0; 
} 
 
/*! @decl void dmalloc_set_name(string filename, int(1..) linenumber) 
 *! 
 *! @note 
 *!   Only available when compiled with dmalloc. 
 */ 
PIKEFUN void dmalloc_set_name(string filename, int(1..) linenumber) 
{ 
  dmalloc_default_location = dynamic_location(filename->str, linenumber); 
} 
 
extern void list_open_fds(void); 
 
/*! @decl void list_open_fds() 
 *! 
 *! @note 
 *!   Only available when compiled with dmalloc. 
 */ 
PIKEFUN void list_open_fds() 
{ 
  list_open_fds(); 
} 
 
/*! @decl void dump_dmalloc_locations(string|array|mapping| @ 
 *!                                   multiset|function|object| @ 
 *!                                   program|type o) 
 *! 
 *! @note 
 *!   Only available when compiled with dmalloc. 
 */ 
PIKEFUN void dump_dmalloc_locations(string|array|mapping|multiset|function|object|program|type o) 
{ 
  if(!REFCOUNTED_TYPE(TYPEOF(*o))) 
    SIMPLE_ARG_TYPE_ERROR("refs", 1, 
                          "array|mapping|multiset|object|" 
                          "function|program|string|type"); 
  debug_malloc_dump_references (o->u.refs, 2, 1, 0); 
} 
#endif /* DEBUG_MALLOC */ 
 
/*! @decl mapping(string:int) get_program_layout(program p) 
 *! Returns a mapping which describes the layout of compiled machine 
 *! code in the program @expr{p@}. The indices of the returned mapping 
 *! are function names, the values the starting address of the compiled 
 *! function. The total size of the program code is stored with index 
 *! @expr{0@}. 
 */ 
PIKEFUN mapping get_program_layout(program p) { 
  size_t i; 
  struct mapping *m = allocate_mapping(64); 
 
  if(p->flags & PROGRAM_FINISHED) { 
    for (i = 0; i < p->num_identifier_references; i++) { 
      struct reference *ref = p->identifier_references + i; 
      struct identifier *id = ID_FROM_PTR(p, ref); 
 
      if ((id->identifier_flags & IDENTIFIER_TYPE_MASK) 
            == IDENTIFIER_PIKE_FUNCTION 
          && !ref->inherit_offset) { 
        PIKE_OPCODE_T *pc = p->program + id->func.offset; 
        struct svalue sv; 
 
        ulongest_to_svalue_no_free(&sv, (UINT64)PTR_TO_INT(pc)); 
 
        mapping_string_insert(m, id->name, &sv); 
        free_svalue(&sv); 
      } 
    } 
 
    { 
      struct svalue key, value; 
 
      SET_SVAL(key, PIKE_T_INT, NUMBER_NUMBER, integer, 0); 
      SET_SVAL(value, PIKE_T_INT, NUMBER_NUMBER, integer, 
               p->num_program * sizeof(PIKE_OPCODE_T)); 
      mapping_insert(m, &key, &value); 
    } 
  } 
 
  RETURN m; 
} 
 
/*! @decl int(0..) map_all_programs(function(program:void) cb) 
 *! 
 *! Call cb for all programs that currently exist. 
 *! 
 *! Programs might be missed if @[cb] creates new programs. 
 *! 
 *! This function is only intended to be used for debug purposes. 
 *! 
 *! @returns 
 *!   The total number of programs 
 *! 
 *! @seealso 
 *!   @[map_all_objects()] 
 */ 
PIKEFUN int(0..) map_all_programs(function(program:void) cb) 
{ 
  struct program *p = first_program; 
  INT32 total = 0; 
 
 
  while( p ) 
  { 
    struct program *next; 
 
    if (p->flags & PROGRAM_FINISHED) { 
      add_ref(p); 
      ref_push_program( p ); 
      safe_apply_svalue( Pike_sp-2, 1, 1 ); 
      pop_stack(); 
      total++; 
      next = p->next; 
      sub_ref(p); 
    } else next = p->next; 
    p = next; 
  } 
  RETURN total; 
} 
 
/*! @endmodule 
 */ 
 
PIKE_MODULE_INIT 
{ 
  INIT; 
#ifdef PIKE_DEBUG 
  ADD_INT_CONSTANT("HAVE_DEBUG", 1, 0); 
#endif 
} 
 
PIKE_MODULE_EXIT 
{ 
  EXIT; 
}