vm/errors.cpp

   1 #include "master.hpp"
   2
   3 namespace factor
   4 {
   5
   6 void factorvm::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 factorvm::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 factorvm::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 factorvm::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 factorvm::type_error(cell type, cell tagged)
  80 {
  81         general_error(ERROR_TYPE,tag_fixnum(type),tagged,NULL);
  82 }
  83
  84 void factorvm::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 factorvm::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 factorvm::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 factorvm::signal_error(int signal, stack_frame *native_stack)
 117 {
 118         general_error(ERROR_SIGNAL,tag_fixnum(signal),F,native_stack);
 119 }
 120
 121 void factorvm::divide_by_zero_error()
 122 {
 123         general_error(ERROR_DIVIDE_BY_ZERO,F,F,NULL);
 124 }
 125
 126 void factorvm::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 factorvm::primitive_call_clear()
 132 {
 133         throw_impl(dpop(),stack_chain->callstack_bottom,this);
 134 }
 135
 136 PRIMITIVE(call_clear)
 137 {
 138         PRIMITIVE_GETVM()->primitive_call_clear();
 139 }
 140
 141 /* For testing purposes */
 142 inline void factorvm::primitive_unimplemented()
 143 {
 144         not_implemented_error();
 145 }
 146
 147 PRIMITIVE(unimplemented)
 148 {
 149         PRIMITIVE_GETVM()->primitive_unimplemented();
 150 }
 151
 152 void factorvm::memory_signal_handler_impl()
 153 {
 154         memory_protection_error(signal_fault_addr,signal_callstack_top);
 155 }
 156
 157 void memory_signal_handler_impl()
 158 {
 159         SIGNAL_VM_PTR()->memory_signal_handler_impl();
 160 }
 161
 162 void factorvm::misc_signal_handler_impl()
 163 {
 164         signal_error(signal_number,signal_callstack_top);
 165 }
 166
 167 void misc_signal_handler_impl()
 168 {
 169         SIGNAL_VM_PTR()->misc_signal_handler_impl();
 170 }
 171
 172 void factorvm::fp_signal_handler_impl()
 173 {
 174         fp_trap_error(signal_fpu_status,signal_callstack_top);
 175 }
 176
 177 void fp_signal_handler_impl()
 178 {
 179         SIGNAL_VM_PTR()->fp_signal_handler_impl();
 180 }
 181
 182 }