vm/errors.cpp

   1 #include "master.hpp"
   2
   3 namespace factor
   4 {
   5
   6 void factor_vm::out_of_memory()
   7 {
   8         print_string("Out of memory\n\n");
   9         dump_generations();
  10         exit(1);
  11 }
  12
  13 void fatal_error(const char* msg, cell tagged)
  14 {
  15         print_string("fatal_error: "); print_string(msg);
  16         print_string(": "); print_cell_hex(tagged); nl();
  17         exit(1);
  18 }
  19
  20 void factor_vm::critical_error(const char* msg, cell tagged)
  21 {
  22         print_string("You have triggered a bug in Factor. Please report.\n");
  23         print_string("critical_error: "); print_string(msg);
  24         print_string(": "); print_cell_hex(tagged); nl();
  25         factorbug();
  26 }
  27
  28 void factor_vm::throw_error(cell error, stack_frame *callstack_top)
  29 {
  30         /* If the error handler is set, we rewind any C stack frames and
  31         pass the error to user-space. */
  32         if(userenv[BREAK_ENV] != F)
  33         {
  34                 /* If error was thrown during heap scan, we re-enable the GC */
  35                 gc_off = false;
  36
  37                 /* Reset local roots */
  38                 gc_locals.clear();
  39                 gc_bignums.clear();
  40
  41                 /* If we had an underflow or overflow, stack pointers might be
  42                 out of bounds */
  43                 fix_stacks();
  44
  45                 dpush(error);
  46
  47                 /* Errors thrown from C code pass NULL for this parameter.
  48                 Errors thrown from Factor code, or signal handlers, pass the
  49                 actual stack pointer at the time, since the saved pointer is
  50                 not necessarily up to date at that point. */
  51                 if(callstack_top)
  52                 {
  53                         callstack_top = fix_callstack_top(callstack_top,
  54                                 stack_chain->callstack_bottom);
  55                 }
  56                 else
  57                         callstack_top = stack_chain->callstack_top;
  58
  59                 throw_impl(userenv[BREAK_ENV],callstack_top,this);
  60         }
  61         /* Error was thrown in early startup before error handler is set, just
  62         crash. */
  63         else
  64         {
  65                 print_string("You have triggered a bug in Factor. Please report.\n");
  66                 print_string("early_error: ");
  67                 print_obj(error);
  68                 nl();
  69                 factorbug();
  70         }
  71 }
  72
  73 void factor_vm::general_error(vm_error_type error, cell arg1, cell arg2, stack_frame *callstack_top)
  74 {
  75         throw_error(allot_array_4(userenv[ERROR_ENV],
  76                 tag_fixnum(error),arg1,arg2),callstack_top);
  77 }
  78
  79 void factor_vm::type_error(cell type, cell tagged)
  80 {
  81         general_error(ERROR_TYPE,tag_fixnum(type),tagged,NULL);
  82 }
  83
  84 void factor_vm::not_implemented_error()
  85 {
  86         general_error(ERROR_NOT_IMPLEMENTED,F,F,NULL);
  87 }
  88
  89 /* Test if 'fault' is in the guard page at the top or bottom (depending on
  90 offset being 0 or -1) of area+area_size */
  91 bool factor_vm::in_page(cell fault, cell area, cell area_size, int offset)
  92 {
  93         int pagesize = getpagesize();
  94         area += area_size;
  95         area += offset * pagesize;
  96
  97         return fault >= area && fault <= area + pagesize;
  98 }
  99
 100 void factor_vm::memory_protection_error(cell addr, stack_frame *native_stack)
 101 {
 102         if(in_page(addr, ds_bot, 0, -1))
 103                 general_error(ERROR_DS_UNDERFLOW,F,F,native_stack);
 104         else if(in_page(addr, ds_bot, ds_size, 0))
 105                 general_error(ERROR_DS_OVERFLOW,F,F,native_stack);
 106         else if(in_page(addr, rs_bot, 0, -1))
 107                 general_error(ERROR_RS_UNDERFLOW,F,F,native_stack);
 108         else if(in_page(addr, rs_bot, rs_size, 0))
 109                 general_error(ERROR_RS_OVERFLOW,F,F,native_stack);
 110         else if(in_page(addr, nursery.end, 0, 0))
 111                 critical_error("allot_object() missed GC check",0);
 112         else
 113                 general_error(ERROR_MEMORY,allot_cell(addr),F,native_stack);
 114 }
 115
 116 void factor_vm::signal_error(int signal, stack_frame *native_stack)
 117 {
 118         general_error(ERROR_SIGNAL,tag_fixnum(signal),F,native_stack);
 119 }
 120
 121 void factor_vm::divide_by_zero_error()
 122 {
 123         general_error(ERROR_DIVIDE_BY_ZERO,F,F,NULL);
 124 }
 125
 126 void factor_vm::fp_trap_error(unsigned int fpu_status, stack_frame *signal_callstack_top)
 127 {
 128         general_error(ERROR_FP_TRAP,tag_fixnum(fpu_status),F,signal_callstack_top);
 129 }
 130
 131 inline void factor_vm::primitive_call_clear()
 132 {
 133         throw_impl(dpop(),stack_chain->callstack_bottom,this);
 134 }
 135
 136 PRIMITIVE_FORWARD(call_clear)
 137
 138 /* For testing purposes */
 139 inline void factor_vm::primitive_unimplemented()
 140 {
 141         not_implemented_error();
 142 }
 143
 144 PRIMITIVE_FORWARD(unimplemented)
 145
 146 void factor_vm::memory_signal_handler_impl()
 147 {
 148         memory_protection_error(signal_fault_addr,signal_callstack_top);
 149 }
 150
 151 void memory_signal_handler_impl()
 152 {
 153         SIGNAL_VM_PTR()->memory_signal_handler_impl();
 154 }
 155
 156 void factor_vm::misc_signal_handler_impl()
 157 {
 158         signal_error(signal_number,signal_callstack_top);
 159 }
 160
 161 void misc_signal_handler_impl()
 162 {
 163         SIGNAL_VM_PTR()->misc_signal_handler_impl();
 164 }
 165
 166 void factor_vm::fp_signal_handler_impl()
 167 {
 168         fp_trap_error(signal_fpu_status,signal_callstack_top);
 169 }
 170
 171 void fp_signal_handler_impl()
 172 {
 173         SIGNAL_VM_PTR()->fp_signal_handler_impl();
 174 }
 175
 176 }