vm/objects.hpp

   1 namespace factor
   2 {
   3
   4 // Special object count and identifiers must be kept in sync with:
   5 //   core/kernel/kernel.factor
   6 //   core/bootstrap/image/image.factor
   7
   8 static const cell special_object_count = 80;
   9
  10 enum special_object {
  11         OBJ_WALKER_HOOK = 3,       /* non-local exit hook, used by library only */
  12         OBJ_CALLCC_1,              /* used to pass the value in callcc1 */
  13
  14         ERROR_HANDLER_QUOT = 5,    /* quotation called when VM throws an error */
  15         OBJ_ERROR,                 /* a marker consed onto kernel errors */
  16
  17         OBJ_CELL_SIZE = 7,         /* sizeof(cell) */
  18         OBJ_CPU,                   /* CPU architecture */
  19         OBJ_OS,                    /* operating system name */
  20
  21         OBJ_ARGS = 10,             /* command line arguments */
  22         OBJ_STDIN,                 /* stdin FILE* handle */
  23         OBJ_STDOUT,                /* stdout FILE* handle */
  24
  25         OBJ_IMAGE = 13,            /* image path name */
  26         OBJ_EXECUTABLE,            /* runtime executable path name */
  27
  28         OBJ_EMBEDDED = 15,         /* are we embedded in another app? */
  29         OBJ_EVAL_CALLBACK,         /* used when Factor is embedded in a C app */
  30         OBJ_YIELD_CALLBACK,        /* used when Factor is embedded in a C app */
  31         OBJ_SLEEP_CALLBACK,        /* used when Factor is embedded in a C app */
  32
  33         OBJ_STARTUP_QUOT = 20,     /* startup quotation */
  34         OBJ_GLOBAL,                /* global namespace */
  35         OBJ_SHUTDOWN_QUOT,         /* shutdown quotation */
  36
  37         /* Quotation compilation in quotations.c */
  38         JIT_PROLOG = 23,
  39         JIT_PRIMITIVE_WORD,
  40         JIT_PRIMITIVE,
  41         JIT_WORD_JUMP,
  42         JIT_WORD_CALL,
  43         JIT_IF_WORD,
  44         JIT_IF,
  45         JIT_EPILOG,
  46         JIT_RETURN,
  47         JIT_PROFILING,
  48         JIT_PUSH_IMMEDIATE,
  49         JIT_DIP_WORD,
  50         JIT_DIP,
  51         JIT_2DIP_WORD,
  52         JIT_2DIP,
  53         JIT_3DIP_WORD,
  54         JIT_3DIP,
  55         JIT_EXECUTE,
  56         JIT_DECLARE_WORD,
  57
  58         /* External entry points */
  59         C_TO_FACTOR_WORD,
  60         LAZY_JIT_COMPILE_WORD,
  61         UNWIND_NATIVE_FRAMES_WORD,
  62         GET_FPU_STATE_WORD,
  63         SET_FPU_STATE_WORD,
  64         SIGNAL_HANDLER_WORD,
  65         LEAF_SIGNAL_HANDLER_WORD,
  66
  67         /* Incremented on every modify-code-heap call; invalidates call( inline
  68         caching */
  69         REDEFINITION_COUNTER = 49,
  70
  71         /* Callback stub generation in callbacks.c */
  72         CALLBACK_STUB = 50,
  73
  74         /* Polymorphic inline cache generation in inline_cache.c */
  75         PIC_LOAD = 51,
  76         PIC_TAG,
  77         PIC_TUPLE,
  78         PIC_CHECK_TAG,
  79         PIC_CHECK_TUPLE,
  80         PIC_HIT,
  81         PIC_MISS_WORD,
  82         PIC_MISS_TAIL_WORD,
  83
  84         /* Megamorphic cache generation in dispatch.c */
  85         MEGA_LOOKUP = 59,
  86         MEGA_LOOKUP_WORD,
  87         MEGA_MISS_WORD,
  88
  89         OBJ_UNDEFINED = 62,       /* default quotation for undefined words */
  90
  91         OBJ_STDERR = 63,          /* stderr FILE* handle */
  92
  93         OBJ_STAGE2 = 64,          /* have we bootstrapped? */
  94
  95         OBJ_CURRENT_THREAD = 65,
  96
  97         OBJ_THREADS = 66,
  98         OBJ_RUN_QUEUE = 67,
  99         OBJ_SLEEP_QUEUE = 68,
 100
 101         OBJ_VM_COMPILER = 69,     /* version string of the compiler we were built with */
 102
 103         OBJ_WAITING_CALLBACKS = 70,
 104 };
 105
 106 /* save-image-and-exit discards special objects that are filled in on startup
 107 anyway, to reduce image size */
 108 #define OBJ_FIRST_SAVE OBJ_STARTUP_QUOT
 109 #define OBJ_LAST_SAVE OBJ_STAGE2
 110
 111 inline static bool save_special_p(cell i)
 112 {
 113         return (i >= OBJ_FIRST_SAVE && i <= OBJ_LAST_SAVE);
 114 }
 115
 116 template<typename Iterator> void object::each_slot(Iterator &iter)
 117 {
 118         cell scan = (cell)this;
 119         cell payload_start = binary_payload_start();
 120         cell end = scan + payload_start;
 121
 122         scan += sizeof(cell);
 123
 124         while(scan < end)
 125         {
 126                 iter((cell *)scan);
 127                 scan += sizeof(cell);
 128         }
 129 }
 130
 131 }