vm/errors.cpp

   1 #include "master.hpp"
   2
   3 namespace factor
   4 {
   5
   6 void fatal_error(const char *msg, cell tagged)
   7 {
   8         std::cout << "fatal_error: " << msg;
   9         std::cout << ": " << std::hex << tagged << std::dec;
  10         std::cout << std::endl;
  11         exit(1);
  12 }
  13
  14 void critical_error(const char *msg, cell tagged)
  15 {
  16         std::cout << "You have triggered a bug in Factor. Please report.\n";
  17         std::cout << "critical_error: " << msg;
  18         std::cout << ": " << std::hex << tagged << std::dec;
  19         std::cout << std::endl;
  20         current_vm()->factorbug();
  21 }
  22
  23 void out_of_memory()
  24 {
  25         std::cout << "Out of memory\n\n";
  26         current_vm()->dump_generations();
  27         exit(1);
  28 }
  29
  30 void factor_vm::throw_error(cell error)
  31 {
  32         /* If the error handler is set, we rewind any C stack frames and
  33         pass the error to user-space. */
  34         if(!current_gc && to_boolean(special_objects[ERROR_HANDLER_QUOT]))
  35         {
  36                 /* If error was thrown during heap scan, we re-enable the GC */
  37                 gc_off = false;
  38
  39                 /* Reset local roots */
  40                 data_roots.clear();
  41                 bignum_roots.clear();
  42                 code_roots.clear();
  43
  44                 /* If we had an underflow or overflow, data or retain stack
  45                 pointers might be out of bounds */
  46                 ctx->fix_stacks();
  47
  48                 ctx->push(error);
  49
  50                 unwind_native_frames(special_objects[ERROR_HANDLER_QUOT],
  51                         ctx->callstack_top);
  52         }
  53         /* Error was thrown in early startup before error handler is set, just
  54         crash. */
  55         else
  56         {
  57                 std::cout << "You have triggered a bug in Factor. Please report.\n";
  58                 std::cout << "early_error: ";
  59                 print_obj(error);
  60                 std::cout << std::endl;
  61                 factorbug();
  62         }
  63 }
  64
  65 void factor_vm::general_error(vm_error_type error, cell arg1, cell arg2)
  66 {
  67         throw_error(allot_array_4(special_objects[OBJ_ERROR],
  68                 tag_fixnum(error),arg1,arg2));
  69 }
  70
  71 void factor_vm::type_error(cell type, cell tagged)
  72 {
  73         general_error(ERROR_TYPE,tag_fixnum(type),tagged);
  74 }
  75
  76 void factor_vm::not_implemented_error()
  77 {
  78         general_error(ERROR_NOT_IMPLEMENTED,false_object,false_object);
  79 }
  80
  81 void factor_vm::memory_protection_error(cell addr)
  82 {
  83         /* Retain and call stack underflows are not supposed to happen */
  84
  85         if(ctx->datastack_seg->underflow_p(addr))
  86                 general_error(ERROR_DATASTACK_UNDERFLOW,false_object,false_object);
  87         else if(ctx->datastack_seg->overflow_p(addr))
  88                 general_error(ERROR_DATASTACK_OVERFLOW,false_object,false_object);
  89         else if(ctx->retainstack_seg->underflow_p(addr))
  90                 general_error(ERROR_RETAINSTACK_UNDERFLOW,false_object,false_object);
  91         else if(ctx->retainstack_seg->overflow_p(addr))
  92                 general_error(ERROR_RETAINSTACK_OVERFLOW,false_object,false_object);
  93         else if(ctx->callstack_seg->underflow_p(addr))
  94                 general_error(ERROR_CALLSTACK_OVERFLOW,false_object,false_object);
  95         else if(ctx->callstack_seg->overflow_p(addr))
  96                 general_error(ERROR_CALLSTACK_UNDERFLOW,false_object,false_object);
  97         else
  98                 general_error(ERROR_MEMORY,from_unsigned_cell(addr),false_object);
  99 }
 100
 101 void factor_vm::signal_error(cell signal)
 102 {
 103         general_error(ERROR_SIGNAL,from_unsigned_cell(signal),false_object);
 104 }
 105
 106 void factor_vm::divide_by_zero_error()
 107 {
 108         general_error(ERROR_DIVIDE_BY_ZERO,false_object,false_object);
 109 }
 110
 111 void factor_vm::fp_trap_error(unsigned int fpu_status)
 112 {
 113         general_error(ERROR_FP_TRAP,tag_fixnum(fpu_status),false_object);
 114 }
 115
 116 /* For testing purposes */
 117 void factor_vm::primitive_unimplemented()
 118 {
 119         not_implemented_error();
 120 }
 121
 122 void factor_vm::memory_signal_handler_impl()
 123 {
 124         scrub_return_address();
 125         memory_protection_error(signal_fault_addr);
 126 }
 127
 128 void memory_signal_handler_impl()
 129 {
 130         current_vm()->memory_signal_handler_impl();
 131 }
 132
 133 void factor_vm::misc_signal_handler_impl()
 134 {
 135         scrub_return_address();
 136         signal_error(signal_number);
 137 }
 138
 139 void misc_signal_handler_impl()
 140 {
 141         current_vm()->misc_signal_handler_impl();
 142 }
 143
 144 void factor_vm::fp_signal_handler_impl()
 145 {
 146         /* Clear pending exceptions to avoid getting stuck in a loop */
 147         set_fpu_state(get_fpu_state());
 148
 149         scrub_return_address();
 150         fp_trap_error(signal_fpu_status);
 151 }
 152
 153 void fp_signal_handler_impl()
 154 {
 155         current_vm()->fp_signal_handler_impl();
 156 }
 157
 158 }